COMPOSITIONS, KITS, AND METHODS FOR ALTERING THE COLOR OF KERATINOUS FIBERS

RELATED APPLICATION

[001] The application claims priority to U.S. Provisional Application No. 63/071 ,569 filed August 28, 2020.

TECHNICAL FIELD

[002] The present disclosure relates to compositions for altering the color of hair comprising a buffer system, a hair color base that comprises a buffer system, hair coloraltering compositions comprising a buffer system or hair color base comprising a buffer system, and kits and methods for altering the color of keratinous fibers such as hair.

BACKGROUND

[003] Changing or enhancing the appearance of hair is very popular with consumers, including for example changing hair color and/or imparting various properties, for example, shine and conditioning of the hair. Hair coloring typically involves bleaching, lightening, and/or changing the hair color through oxidative dyes, direct dyes, and/or pigments providing a different shade or color, and/or lifting the color of the hair.

[004] Hair lightening processes, or lifting the color of hair, generally require the use of compositions that comprise at least one oxidizing agent to lighten the color of dark hair to lighter shades. When colorants or dye compounds such as oxidation dye precursors and/or direct dyes are present in these compositions, such compositions can change or deposit color while lightening the color of hair at the same time. Conventional hair coloring products are permanent dye compositions comprising oxidation dye precursors, which are also known as primary intermediates or couplers. These oxidation dye precursors are colorless or weakly colored compounds which, when combined with oxidizing agents, give rise to colored complexes by a process of oxidative condensation. [005] Variation in tone height before and after the application of a hair color-altering composition is typically evaluated when lightening or lifting the color of the hair. The degree or level of lightening or lift is determined by the variation. “Tone” refers to the “finish” of a shade, including is degree of warmth or coolness and is based on the classification of natural shades, one tone separating each shade from the shade immediately following or preceding it. Tone heights or levels typically range from 1 (black) to 10 (light blonde), one unit generally corresponding to one tone. Accordingly, the higher the tone number, the lighter the shade and the greater the degree of lift.

[006] Hair lightening or color lifting compositions may require one or more alkalizing agent, such as ammonia, an ammonia gas-generating compound, an amine, and/or ammonium-based compound. The alkalizing agent causes the hair shaft to swell, thus allowing small oxidative dye molecules to penetrate the cuticle and cortex before the oxidation condensation process is completed. The resulting larger-sized colored complexes from the oxidative reaction are then trapped inside the hair fiber, thereby permanently altering the color of the hair. While such hair dyeing and/or color lifting compositions can effectively alter the color of hair, these compositions can damage the hair fibers and/or irritate the scalp due to excessively high levels of alkalinity.

[007] Such damage and/or irritation can be exacerbated by processing time. Typical processing times can range from thirty (30) minutes to as much as forty-five (45) minutes or more. The greater the processing time, the lighter the hair result and/or the more intense the color application. However, as the processing time increases, typically more damage to the hair and/or irritation to the scalp results. There is, therefore, a need for compositions and methods that can lift the color of hair and/or deposit color onto hair in an efficient and/or improved manner, while preventing excess damage to the hair and/or scalp irritation.

[008] Use of new and additional ingredients and novel combinations of ingredients are continuously sought in attempts to mitigate or avoid hair damage and/or scalp irritation, as well as to improve the cosmetic performance of hair color lifting and hair dyeing compositions. While achieving desired safety and performance objectives, however, the choice of ingredients or combinations of ingredients frequently pose difficulties insofar as they cannot be detrimental to other cosmetic attributes. Ingredient combinations must be considered for attributes such as, ease and uniformity of application, rheology or viscosity properties, stability of the compositions, and/or color deposit and target shade formation, while weighing potential disadvantages such as increased damage and/or a less healthy look to the hair.

[009] Thus, an objective of the present disclosure is to provide novel compositions for altering the color of hair by lifting or lightening the color of the hair, and optionally depositing color onto the hair, that require less processing time thereby minimizing the damage to the hair and overall minimizing other adverse effects. SUMMARY

[0010] The present disclosure relates to compositions and methods for altering the color of hair using a buffer system that provides reduced processing times in methods for altering the color of the hair. While typical processing times are about thirty minutes to forty-five minutes, processing times of the subject compositions and methods are significantly reduced, ranging from about five to twenty minutes. As a result, the subject compositions and methods avoid and/or mitigate damage of the hair and/or scalp during lightening of the hair while at the same time, providing a much more efficient, faster processing time. In various embodiments, the compositions and methods described allow one to achieve a desired level of color lift in tone within reduced processing times. In further embodiments, the compositions and methods allow one to additionally deposit color onto hair within reduced processing times.

[0011] Advantageously, the subject compositions and methods can be utilized in a plethora of hair altering compositions, including for non-limiting example, those with resorcinol, resorcinol derivatives, and resorcinol-free dye compositions. Reduced processing time advantages are provided according to various embodiments of the subject compositions and methods with good deposit, lift, performance, and minimal to no damage to the hair.

[0012] In some embodiments, the disclosure relates to a hair color base comprising a buffer system, wherein the buffer system comprises from about 0.1 % to about 10% of ammonium hydroxide, from about 0.1% to about 5% ammonium bicarbonate, and optionally, from about 0.01% to about 5% monoethanolamine, all amounts by weight, relative to the total weight of the hair color base. The hair color base may optionally comprise at least one colorant component. In further embodiments, the disclosure relates to a hair color composition comprising a buffer system or a hair color base comprising a buffer system, an oxidizing component, and optionally one or more colorant compounds.

[0013] In further embodiments, the disclosure relates to methods of altering the color of the hair, for example coloring, lightening, and/or lifting the tone of the hair, using a hair color base comprising a buffer system according to the disclosure. For example, methods may comprise contacting the hair with a composition for lifting the color of hair for a sufficient period of time to achieve a desired level of lift of the color of the hair, wherein the composition is formed from mixing a hair color base comprising a buffer system with an oxidizing component, wherein the buffer system comprises about 0.1% to about 10% of ammonium hydroxide; about 0.1% to about 5% ammonium bicarbonate; and optionally, about 0.01 % to about 5% monoethanolamine, all amounts by weight, relative to the total weight of the hair color base.

[0014] The disclosure also relates to hair color compositions comprising a hair color base comprising a buffer system, wherein the buffer system comprises from about 0.1% to about 10% of ammonium hydroxide, from about 0.1% to about 5% ammonium bicarbonate, and optionally, from about 0.01% to about 5% monoethanolamine, wherein the amount of ammonium hydroxide is greater than or equal to the amount of ammonium bicarbonate, based on the total weight of the buffer system; from about 25% to about 45% of one or more surfactant; from about 0.1 % to about 20% of at least one fatty compound or oil; and optionally at least one hair colorant; wherein the amounts are by weight, relative to the total weight of the hair color composition.

[0015] In still further embodiments, the disclosure relates to a multi-compartment kit for altering the color of the hair, comprising (i) a first compartment comprising a hair color base comprising a buffer system, wherein the buffer system comprises about 0.1 % to about 10% of ammonium hydroxide, about 0.1 % to about 5% ammonium bicarbonate; and optionally, about 0.01% to about 5% monoethanolamine, wherein the hair color base optionally comprises a colorant compound; and (ii) a second compartment comprising an oxidizing composition comprising at least one oxidizing agent.

BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are incorporated herein and constitute part of this specification, illustrate exemplary embodiments of the invention, and, together with the general description given above and the description provided herein, serve to explain features of the invention.

[0017] FIG. 1 is a graph showing processing times for hair treated with a composition according to the instant disclosure and hair treated with a comparative (benchmark) composition.

[0018] FIG. 2 is a graph demonstrating processing time variations as a function of ratio and/or amount of alkalizing agents of the subject composition and method. [0019] FIG. 3 is a graph showing the effect of the optional monoethanolamine in the alkaline system (ammonium bicarbonate to ammonium hydroxide).

[0020] FIG. 4 is a graph comparing the lift and reaction control of inventive hair color altering compositions according to the disclosure compared to a comparative hair color altering composition on natural level 3 hair.

[0021] FIG. 5 is a graph comparing the lift and reaction control of inventive hair color altering compositions according to the disclosure compared to a comparative hair color altering composition on natural level 6 hair.

[0022] FIG. 6 is a graph comparing the lift and reaction control of inventive hair color altering compositions according to the disclosure compared to a comparative hair color altering composition on natural level 9 hair.

DETAILED DESCRIPTION

[0023] It has been surprisingly and unexpectedly discovered that hair buffer systems according to the disclosure significantly decreases processing time for hair lightening and/or coloring treatments, thereby minimizing the amount of time hair is exposed to the lightening/coloring treatment and thus associated damage to the hair. At the same time, the buffer systems used with lightening/hair coloring treatments was found to improve hair color, lightening, and/or lifting effects in the decreased processing time. For example, the composition provides good uniformity of lift along the fiber between the tip and the root of the hair (also called the “selectivity” of lightening), while decreased processing time mitigates damage to the hair and/or scalp.

[0024] The compositions and methods according to the disclosure provide for dyeing or altering hair color in reduced processing times compared to traditional compositions and methods, preferably ranging from 5 to 25 minutes, such as from 5 to 20 minutes, from 5 to 15 minutes, or from 5 to 10 minutes. The hair color base, hair color altering compositions, and methods use a buffer system comprising ammonium hydroxide, ammonium bicarbonate, and optionally monoethanolamine. The hair color altering compositions, when processed for 5 to 25 minutes or less on the hair, have been found to have the same or substantially the same deposit, lift, and performance as compared to traditional systems that typically process at about 30 minutes or more. The compositions and methods according to the disclosure may be used in combination with resorcinol, resorcinol derivatives, and resorcinol-free dye compositions. [0025] Altering or lifting the color of hair can be achieved with minimal damage to the hair using the reduced processing time compositions and methods of the present disclosure, and particularly, using a buffer system or hair color base comprising a buffer system as described herein. Moreover, it was surprisingly and unexpectedly discovered that by using the compositions of the present disclosure, it was possible to achieve acceptable lift to the color of the hair that corresponds to an increase in tone height in an amount ranging from 0.5 to 4, such as from about 1 to about 3, or from about 1 .5 to about 2.5, in processing times ranging from 5 to 20 minutes, while minimizing damage to the hair.

[0026] Moreover, when the hair color compositions of the present disclosure additionally contain colorant/dye compounds, it was surprisingly and unexpectedly discovered that the compositions can also deposit color effectively and comparably to, if not better than, traditional permanent alkaline commercial hair dyes, while maintaining a significantly reduced process time, and thus, the compositions and processes of the present disclosure can provide for improved color visibility and better color coverage, with less damage to the hair.

[0027] The buffer systems or hair color base compositions according to the disclosure may be mixed with an oxidizing component for lifting or lightening the composition of the hair as described herein. When the hair color composition or hair color base additionally contains a colorant compound, the resulting composition is also used for depositing color onto hair. In at least some embodiments, hair color altering compositions have a unique, non-drip consistency or rheology and yet spreads easily on the hair while imparting other advantages to the hair such as conditioning, a healthy appearance, decreased processing time, shine, and/or less damage to the hair.

[0028] Thus, the present disclosure relates to buffer systems and hair color base compositions comprising the buffer systems, and to compositions for altering the color of the hair comprising the buffer systems or hair color base comprising the buffer systems with decreased processing time and increased reaction control. Kits and methods of altering the color of the hair are also disclosed.

Hair Color Base

[0029] Hair color bases according to the disclosure can be used in compositions and methods for altering the color of the hair. The hair color bases according to the disclosure comprise a buffer system, as well as other components useful in compositions for altering the color of the hair.

Buffer System

[0030] The buffer system comprises ammonium hydroxide, ammonium bicarbonate, and optionally monoethanolamine. It has surprisingly and unexpectedly been found that hair color bases comprising a buffer system according to the disclosure provide compositions and methods that can lift the color of hair and/or deposit color onto hair in an efficient manner, resulting in a reduced processing time. In various embodiments, a plateau effect of the change in hair color is seen after about 5 to about 20 minutes, demonstrating the end of the processing time providing a controlled alteration in the color of the hair.

[0031] The buffer system comprises ammonium hydroxide in an amount ranging from about 0.1 % to about 10%, such as, for example, about 0.5% to about 8%, about 1% to about 7%, about 2% to about 6%, or about 2.5% to about 5% by weight, relative to the weight of the hair color base. In various embodiments, the buffer system comprises ammonium hydroxide in an amount ranging from about 1 % to about 5%, about 1% to about 4%, about 1 % to about 3.75%, about 1 % to about 3%, or about 1% to about 2% by weight, relative to the weight of the hair color base. In further embodiments, the buffer system comprises ammonium hydroxide in an amount ranging from about 2% to about 5%, about 2% to about 4%, about 2% to about 3.75%, or about 2% to about 3% by weight, relative to the weight of the hair color base. In further embodiments, the buffer system comprises ammonium hydroxide in an amount ranging from about 2.5% to about 4.5%, about 3% to about 4.25%, about 3.25% to about 4%, or about 3.5% to about 3.75% by weight, relative to the weight of the hair color base. In still further embodiments, the buffer system comprises ammonium hydroxide in an amount ranging from about 3% to about 7%, about 3.5% to about 6.5%, about 3.75% to about 6.25%, about 4% to about 6%, about 4.25% to about 5.75%, or about 4.5% to about 5.5% by weight, relative to the weight of the hair color base. In some embodiments, the buffer system comprises ammonium hydroxide in an amount of about 1%, about 1.1%, about 1.2%, about 1.3%, about 1.4%, about 1.5%, about 1.6%, about 1.7%, about 1.8%, about 1.9%, about 2%, about 2.1 %, about 2.2%, about 2.3%, about 2.4%, about 2.5%, about 2.6%, about 2.7%, about 2.8%, about 2.9%, about 3%, about 3.1 %, about 3.2%, about 3.3%, about 3.4%, about 3.5%, about 3.6%, about 3.7%, about 3.8%, about 3.9%, about 4%, about 4.1 %, about 4.2%, about 4.3%, about 4.4%, about 4.5%, about 4.6%, about 4.7%, about 4.8%, about 4.9%, about 5%, about 5.1 %, about 5.2%, about 5.3%, about 5.4%, or about 5.5% by weight, relative to the weight of the hair color base, including all ranges and subranges using any of the foregoing as upper or lower limits.

[0032] The buffer system comprises ammonium bicarbonate in an amount ranging from about 0.01 % to about 5% of ammonium bicarbonate, such as, for example, about 0.1 % to about 4%, about 0.5% to about 3.5%, about 0.7% to about 3%, about 0.8% to about 2.5%, about 0.9% to about 2%, or about 1 % to about 1 .75% by weight, relative to the weight of the hair color base. In various embodiments, the buffer system comprises ammonium bicarbonate in an amount ranging from about 0.1% to about 2.5%, about 0.5% to about 2%, about 0.75% to about 1.5%, or about 0.85% to about 1.25% by weight, relative to the weight of the hair color base. In further embodiments, the buffer system comprises ammonium bicarbonate in an amount ranging from about 0.5% to about 3%, about 0.75% to about 2%, or about 1 % to about 1 .75% by weight, relative to the weight of the hair color base. In still further embodiments, the buffer system comprises ammonium bicarbonate in an amount ranging from about 1% to about 4%, about 1 .25% to about 3%, or about 1 .5% to about 2% by weight, relative to the weight of the hair color base. In some embodiments, the buffer system comprises ammonium bicarbonate in an amount of about 0.5%, about 0.6%, about 0.7%, about 0.8%, about 0.9%, about 1%, about 1.1%, about 1.2%, about 1.3%, about 1.4%, about 1.5%, about 1.6%, about 1.7%, about 1.8%, about 1.9%, about 2%, about 2.1%, about 2.2%, about 2.3%, about 2.4%, or about 2.5% by weight, relative to the weight of the hair color base, including all ranges and subranges using any of the foregoing as upper or lower limits.

[0033] If present, the buffer system comprises monoethanolamine in an amount ranging from about 0.01% to about 5%, such as about 0.1% to about 5%, or about 0.5% to about 5% by weight, relative to the weight of the hair color base. In various embodiments, the buffer system comprises monoethanolamine in an amount ranging from about 0.1% to about 1.5%, about 0.2% to about 1.25%, about 0.3% to about 1%, or about 0.4% to about 0.8% by weight, relative to the weight of the hair color base. In further embodiments, the buffer system comprises monoethanolamine in an amount ranging from about 0.1% to about 3%, about 0.25% to about 2.5%, about 0.3% to about 2%, about 0.4% to about 1 .5%, or about 0.5% to about 1 .25% by weight, relative to the weight of the hair color base. In some embodiments, the buffer system comprises monoethanolamine in an amount less than about 1%, such as less than about 0.75% by weight, relative to the weight of the hair color base. In still further embodiments, the buffer system comprises monoethanolamine in an amount ranging from about 3% to about 5%, about 3.5% to about 5%, or about 4% to about 5% by weight, relative to the weight of the hair color base. In some embodiments, the buffer system comprises monoethanolamine in an amount of about 0.5%, about 0.6%, about 0.7%, about 0.8%, about 0.9%, about 1%, about 1.1 %, about 1.2%, about 1.3%, about 1.4%, about 1.5%, about 1.6%, about 1.7%, about 1.8%, about 1.9%, about 2%, about 2.1%, about 2.2%, about 2.3%, about 2.4%, about 2.5%, about 2.6%, about 2.7%, about 2.8%, about 2.9%, about 3%, about 3.1%, about 3.2%, about 3.3%, about 3.4%, about 3.5%, about 3.6%, about 3.7%, about 3.8%, about 3.9%, about 4%, about 4.1%, about 4.2%, about 4.3%, about 4.4%, about 4.5%, about 4.6%, about 4.7%, about 4.8%, about 4.9%, or about 5% by weight, relative to the weight of the hair color base, including all ranges and subranges using any of the foregoing as upper or lower limits. In one preferred embodiment, the buffer system comprises from about 0.01% to about 3%, preferably about 0.05% to about 2.5%, more about preferably 0.1% to about 2%, most preferably about 0.5% to about 1 .5% monoethanolamine by weight, relative to the weight of the hair color base.

[0034] In various embodiments, the amount of ammonium hydroxide in the buffer system and/or hair color base is greater than the amount of ammonium bicarbonate. For example, in various embodiments the buffer system and/or hair color base comprise at least about 2 times more ammonium hydroxide than ammonium bicarbonate, such as at least about 2.5 times more ammonium hydroxide than ammonium bicarbonate. In further embodiments, the amount of ammonium hydroxide in the buffer system and/or hair color base is greater than the amount of ammonium bicarbonate, which in turn is greater than the amount of monoethanolamine.

[0035] It has been surprisingly discovered that the buffering capacity of the buffer systems is most efficient for at least some hair color base compositions when the buffer system comprises certain weight ratio ranges of ammonium bicarbonate to ammonium hydroxide, and/or ammonium bicarbonate to ammonium hydroxide to optional monoethanolamine. Therefore, in at least certain embodiments, the weight ratio of ammonium bicarbonate to ammonium hydroxide in the buffer system and/or hair color base may be less than or equal to about 1 , such as less than or equal to about 0.75, or less than or equal to about 0.5, for example may be about 0.4, about 0.39, about 0.38, about 0.37, about 0.36, about 0.35, about 0.34, about 0.33, about 0.32, about 0.31 , about 0.3, about 0.29, about 0.28, about 0.27, about 0.26, or about 0.25. In certain embodiments, the buffer system and/or hair color base may comprise ammonium bicarbonate and ammonium hydroxide in a weight ratio of ammonium bicarbonate:ammonium hydroxide ranging from about 1 :1 to about 1 :5, from about 1 :1.1 to about 1 :3, from about 1 :1 .5 to about 1 :4, from about 1 :1 .75 to about 1 :3.5, from about 1 :2 to about 1 :3.25, or from about 1 :2.5 to about 1 :3. In other embodiments, the weight ratio of ammonium bicarbonate to ammonium hydroxide in the buffer system and/or hair color base may range from about 1 :2.6 to about 1 :3, about 1 :2.7 to about 1 :3, about 1 :2.8 to about 1 :3, or about 1 :2.9 to about 1 :3, or may be about 1 :2.6, about 1 :2.7, about 1 :2.8, about 1 :2.9, or about 1 :3.

[0036] If monoethanolamine is present, the buffer system and/or hair color base may comprise amounts of monoethanolamine, ammonium bicarbonate, and ammonium hydroxide such that the buffer system and/or hair color base has a weight ratio of monoethanolamine:(ammonium bicarbonate + ammonium hydroxide) ranging from about 1 :>1 to about 1 :20 or from about 1 :2 to 1 :5, such as, for example about 1 :6 to about 6:1 , about 1 :5.5 to about 5.5:1 , about 1 :5 to about 5:1 , about 1 :4 to about 4:1 , about 1 :3 to about 3:1 , about 1 :2.5 to about 2.5:1 , about 1 :2 to about 2:1 , about 1 :1 .5 to about 1.5:1 , or about 1 :1.3 to about 1.3:1 , such as, for example, about 1 :5.4 or about 1 .27:1 . In some embodiments, the hair color altering composition has a weight ratio of monoethanolamine:(ammonium bicarbonate + ammonium hydroxide) ranging from about 1 :7 to about 1 .6:1 , or about 1 :6 to about 1 .3:1 .

[0037] In at least certain embodiments, it is preferable to prepare a buffer system or hair color base comprising a buffer system where the molar ratio of ammonium hydroxide to ammonium bicarbonate ranges from about 0.3 to about 2, such as, for example from about 0.4 to about 1 .75 or about 0.5 to about 1 .5. In other embodiments, it is preferable to prepare a buffer system or hair color base comprising a buffer system where the molar ratio of ammonium hydroxide to ammonium bicarbonate ranges from about 0.75 to about 1.75, such as, for example from about 1 to about 1.5, about 1.1 to about 1.4, about 1.2 to about 1.3, or about 1.25 to about 1.3. For example, the buffer system or hair color base comprising a buffer system where the molar ratio of ammonium hydroxide to ammonium bicarbonate is about 1 , about 1.1 , about 1.15, about 1.2, about 1.25, about 1.3, about 1.35, about 1.4, about 1.45, or about 1.5. In a particularly preferred embodiment, the molar ratio of ammonium hydroxide to ammonium bicarbonate ranges from about 1 .25 to about 1 .3.

[0038] In various exemplary and non-limiting embodiments, the hair color base comprises, based on the total weight of the hair color base, from about 0.5% to about 5%, preferably from about 0.75% to about 4.5%, about 1% to about 4%, or about 1 .25% to about 3.75% of ammonium hydroxide; from about 0.1% to about 2.5%, preferably from about 0.2% to about 2.25%, about 0.25% to about 2%, about 0.3% to about 1 .9%, or about 0.4% to about 1.8% of ammonium bicarbonate; and optionally, from about 0.1 % to about 5%, such as from about 0.5% to about 2.5% of monoethanolamine. In a further exemplary and non-limiting embodiment, the hair color base comprises, based on the total weight of the hair color base, from about 0.5% to about 5%, preferably from about 0.75% to about 4.5%, about 1 % to about 4%, or about 1 .25% to about 3.75% of ammonium hydroxide; from about 0.1% to about 2.5%, preferably from about 0.2% to about 2.25%, about 0.25% to about 2%, about 0.3% to about 1 .9%, or about 0.4% to about 1.8% of ammonium bicarbonate; and optionally, from about 0.1% to about 5%, such as from about 0.5% to about 2.5% of monoethanolamine, wherein the hair color base has a weight ratio of ammonium bicarbonate to ammonium hydroxide ranging from about 1 :2.6 to about 1 :3, about 1 :2.7 to about 1 :3, about 1 :2.8 to about 1 :3, or about 1 :2.9 to about 1 :3, or is about 1 :2.6, about 1 :2.7, about 1 :2.8, about 1 :2.9, or about 1 :3, and/or a molar ratio of ammonium hydroxide to ammonium bicarbonate ranging from about 1 to about 1.5, about 1.1 to about 1.4, about 1.2 to about 1.3, or about 1.25 to about 1 .3.

[0039] In various embodiments, the hair color base comprises, based on the total weight of the hair color base, from about 0.5% to about 3%, preferably from about 0.75% to about 2.5%, about 1 % to about 2.25%, about 1 .25% to about 2%, or about 1.25% to about 1.75% of ammonium hydroxide; from about 0.2% to about 1.5%, preferably from about 0.25% to about 1 %, about 0.3% to about 0.9%, about 0.35% to about 0.75%, or about 0.1 % to about 0.9% of ammonium bicarbonate; and optionally, from about 0.1% to about 5%, such as from about 0.5% to about 2.5% of monoethanolamine. In a further exemplary and non-limiting embodiment, the hair color base comprises, based on the total weight of the hair color base, from about 0.5% to about 3%, preferably from about 0.75% to about 2.5%, about 1% to about 2.25%, about 1.25% to about 2%, or about 1.25% to about 1.75% of ammonium hydroxide; from about 0.2% to about 1.5%, preferably from about 0.25% to about 1%, about 0.3% to about 0.9%, about 0.35% to about 0.75%, or about 0.1% to about 0.9% of ammonium bicarbonate; and optionally, from about 0.1% to about 5%, such as from about 0.5% to about 2.5% of monoethanolamine, wherein the hair color base has a weight ratio of ammonium bicarbonate to ammonium hydroxide ranging from about 1 :2.6 to about 1 :3, about 1 :2.7 to about 1 :3, about 1 :2.8 to about 1 :3, or about 1 :2.9 to about 1 :3, or is about 1 :2.6, about 1 :2.7, about 1 :2.8, about 1 :2.9, or about 1 :3, and/or a molar ratio of ammonium hydroxide to ammonium bicarbonate ranging from about 1 to about 1.5, about 1 .1 to about 1 .4, about 1 .2 to about 1 .3, or about 1 .25 to about 1 .3.

[0040] In a further exemplary and non-limiting embodiment, the hair color base comprises, based on the total weight of the hair color base, from about 1 % to about 4%, preferably from about 1 .25% to about 3.5%, about 1 .5% to about 3%, about 1 .75% to about 2.5%, or about 2% to about 2.5% of ammonium hydroxide; from about 0.2% to about 2.5%, preferably from about 0.3% to about 2%, about 0.4% to about 1 .5%, about 0.5% to about 1.25%, or about 0.5% to about 1% of ammonium bicarbonate; and optionally, from about 0.1 % to about 5%, such as from about 0.5% to about 2.5% of monoethanolamine. In a further exemplary and non-limiting embodiment, the hair color base comprises, based on the total weight of the hair color base, from about 1 % to about 4%, preferably from about 1 .25% to about 3.5%, about 1 .5% to about 3%, about 1 .75% to about 2.5%, or about 2% to about 2.5% of ammonium hydroxide; from about 0.2% to about 2.5%, preferably from about 0.3% to about 2%, about 0.4% to about 1.5%, about 0.5% to about 1.25%, or about 0.5% to about 1% of ammonium bicarbonate; and optionally, from about 0.1% to about 5%, such as from about 0.5% to about 2.5% of monoethanolamine, wherein the hair color base has a weight ratio of ammonium bicarbonate to ammonium hydroxide ranging from about 1 :2.6 to about 1 :3, about 1 :2.7 to about 1 :3, about 1 :2.8 to about 1 :3, or about 1 :2.9 to about 1 :3, or is about 1 :2.6, about 1 :2.7, about 1 :2.8, about 1 :2.9, or about 1 :3, and/or a molar ratio of ammonium hydroxide to ammonium bicarbonate ranging from about 1 to about 1.5, about 1 .1 to about 1 .4, about 1 .2 to about 1 .3, or about 1 .25 to about 1 .3.

[0041] In a further exemplary and non-limiting embodiment, the hair color base comprises, based on the total weight of the hair color base, from about 1 .2% to about 5%, preferably from about 1 .5% to about 4.5%, about 1 .75% to about 4%, about 2% to about 3.5%, or about 2.25% to about 3.25% of ammonium hydroxide; from about 0.5% to about 3.5%, preferably from about 0.5% to about 2.5%, about 0.5% to about 2%, about 0.75% to about 1 .5%, or about 0.75% to about 1 .25% of ammonium bicarbonate; and optionally, from about 0.1% to about 5%, such as from about 0.5% to about 2.5% of monoethanolamine. In a further exemplary and non-limiting embodiment, the hair color base comprises, based on the total weight of the hair color base, from about 1 .2% to about 5%, preferably from about 1 .5% to about 4.5%, about 1 .75% to about 4%, about 2% to about 3.5%, or about 2.25% to about 3.25% of ammonium hydroxide; from about 0.5% to about 3.5%, preferably from about 0.5% to about 2.5%, about 0.5% to about 2%, about 0.75% to about 1.5%, or about 0.75% to about 1.25% of ammonium bicarbonate; and optionally, from about 0.1% to about 5%, such as from about 0.5% to about 2.5% of monoethanolamine, wherein the hair color base has a weight ratio of ammonium bicarbonate to ammonium hydroxide ranging from about 1 :2.6 to about 1 :3, about 1 :2.7 to about 1 :3, about 1 :2.8 to about 1 :3, or about 1 :2.9 to about 1 :3, or is about 1 :2.6, about 1 :2.7, about 1 :2.8, about 1 :2.9, or about 1 :3, and/or a molar ratio of ammonium hydroxide to ammonium bicarbonate ranging from about 1 to about 1.5, about 1 .1 to about 1 .4, about 1 .2 to about 1 .3, or about 1 .25 to about 1 .3.

[0042] In a further exemplary and non-limiting embodiment, the hair color base comprises, based on the total weight of the hair color base, from about 2% to about 5%, preferably from about 2.5% to about 4.75%, about 2.75% to about 4.5%, about 3% to about 4.25%, or about 3.25% to about 4% of ammonium hydroxide; from about 0.5% to about 3.5%, preferably from about 0.75% to about 3%, about 0.75% to about 2.5%, or about 1 % to about 1.5% of ammonium bicarbonate; and optionally, from about 0.1% to about 5%, such as from about 0.5% to about 2.5% of monoethanolamine. In a further exemplary and non-limiting embodiment, the hair color base comprises, based on the total weight of the hair color base, from about 2% to about 5%, preferably from about 2.5% to about 4.75%, about 2.75% to about 4.5%, about 3% to about 4.25%, or about 3.25% to about 4% of ammonium hydroxide; from about 0.5% to about 3.5%, preferably from about 0.75% to about 3%, about 0.75% to about 2.5%, or about 1% to about 1 .5% of ammonium bicarbonate; and optionally, from about 0.1% to about 5%, such as from about 0.5% to about 2.5% of monoethanolamine, wherein the hair color base has a weight ratio of ammonium bicarbonate to ammonium hydroxide ranging from about 1 :2.6 to about 1 :3, about 1 :2.7 to about 1 :3, about 1 :2.8 to about 1 :3, or about 1 :2.9 to about 1 :3, or is about 1 :2.6, about 1 :2.7, about 1 :2.8, about 1 :2.9, or about 1 :3, and/or a molar ratio of ammonium hydroxide to ammonium bicarbonate ranging from about 1 to about 1 .5, about 1 .1 to about 1 .4, about 1 .2 to about 1 .3, or about 1 .25 to about 1 .3. [0043] In a still further exemplary and non-limiting embodiment, the hair color base comprises, based on the total weight of the hair color base, from about 3% to about 6.5%, preferably from about 3.5% to about 6.25%, about 3.75% to about 6%, about 4% to about 6%, about 4% to about 5.75%, or about 4.5% to about 5.5% of ammonium hydroxide; from about 0.5% to about 3.5%, preferably from about 0.75% to about 3%, about 1% to about 2.5%, about 1.25% to about 2.25%, or about 1.5% to about 2% of ammonium bicarbonate; and optionally, from about 0.1% to about 5%, such as from about 0.5% to about 2.5% of monoethanolamine. In a further exemplary and nonlimiting embodiment, the hair color base comprises, based on the total weight of the hair color base, from about 3% to about 6.5%, preferably from about 3.5% to about 6.25%, about 3.75% to about 6%, about 4% to about 6%, about 4% to about 5.75%, or about 4.5% to about 5.5% of ammonium hydroxide; from about 0.5% to about 3.5%, preferably from about 0.75% to about 3%, about 1 % to about 2.5%, about 1.25% to about 2.25%, or about 1.5% to about 2% of ammonium bicarbonate; and optionally, from about 0.1% to about 5%, such as from about 0.5% to about 2.5% of monoethanolamine, wherein the hair color base has a weight ratio of ammonium bicarbonate to ammonium hydroxide ranging from about 1 :2.6 to about 1 :3, about 1 :2.7 to about 1 :3, about 1 :2.8 to about 1 :3, or about 1 :2.9 to about 1 :3, or is about 1 :2.6, about 1 :2.7, about 1 :2.8, about 1 :2.9, or about 1 :3, and/or a molar ratio of ammonium hydroxide to ammonium bicarbonate ranging from about 1 to about 1.5, about 1.1 to about 1 .4, about 1 .2 to about 1 .3, or about 1 .25 to about 1 .3.

[0044] For example, the hair color base may include about 2.75% to about 3% ammonium hydroxide, about 0.75% to about 1 .25% ammonium bicarbonate, and optionally from about 0.5% to about 1 % monoethanolamine, all weights based on the total weight of the hair color base. Preferably, the hair color base has a weight ratio of ammonium bicarbonate to ammonium hydroxide ranging from about 1 :2.5 to about 1 :3, such as about 1 :2.7 to about 1 :2.9, and/or a molar ratio of ammonium hydroxide to ammonium bicarbonate ranging from about 1 to about 1 .5, such as about 1 .25 to about 1.3.

[0045] In a further example, the hair color base may include about 3.25% to about 3.75% ammonium hydroxide, about 1% to about 1.5% ammonium bicarbonate, and optionally from about 0.5% to about 1 % monoethanolamine, all weights based on the total weight of the hair color base. Preferably, the hair color base has a weight ratio of ammonium bicarbonate to ammonium hydroxide ranging from about 1 :2.5 to about 1 :3, such as about 1 :2.7 to about 1 :2.9, and/or a molar ratio of ammonium hydroxide to ammonium bicarbonate ranging from about 1 to about 1 .5, such as about 1 .25 to about

1.3.

[0046] In a further example, the hair color base may include about 4.75% to about 5.25% ammonium hydroxide, about 1.5% to about 2% ammonium bicarbonate, and optionally from about 0.5% to about 1 % monoethanolamine, all weights based on the total weight of the hair color base. Preferably, the hair color base has a weight ratio of ammonium bicarbonate to ammonium hydroxide ranging from about 1 :2.5 to about 1 :3, such as about 1 :2.7 to about 1 :2.9, and/or a molar ratio of ammonium hydroxide to ammonium bicarbonate ranging from about 1 to about 1 .5, such as about 1 .25 to about

1.3.

[0047] In yet a further example, the hair color base may include about 2% to about 2.5% ammonium hydroxide, about 0.5% to about 1 % ammonium bicarbonate, and optionally from about 0.5% to about 1 % monoethanolamine, all weights based on the total weight of the hair color base. Preferably, the hair color base has a weight ratio of ammonium bicarbonate to ammonium hydroxide ranging from about 1 :2.5 to about 1 :3, such as about 1 :2.7 to about 1 :2.9, and/or a molar ratio of ammonium hydroxide to ammonium bicarbonate ranging from about 1 to about 1 .5, such as about 1 .25 to about

1.3.

[0048] In a still further example, the hair color base may include about 1 .25% to about 1.75% ammonium hydroxide, about 0.1% to about 0.9% ammonium bicarbonate, and optionally from about 0.5% to about 1 % monoethanolamine, all weights based on the total weight of the hair color base. Preferably, the hair color base has a weight ratio of ammonium bicarbonate to ammonium hydroxide ranging from about 1 :2.5 to about 1 :3, such as about 1 :2.7 to about 1 :2.9, and/or a molar ratio of ammonium hydroxide to ammonium bicarbonate ranging from about 1 to about 1 .5, such as about 1 .25 to about

1.3.

[0049] The components of the buffer system and hair color base may be chosen to maintain an alkaline pH of the hair color base and/or hair color-altering composition. Thus, according to one embodiment, the pH of the hair color base ranges from about 8 to about 11. In some embodiments, the pH of the hair color base may range from about 8.5 to about 10, such as from about 8.5 to about 9.5, about 9.0 to about 9.5, or about 9.2 to about 9.5. When additional components such as a colorant is present, the pH of the hair color base may vary within the above range according to the type of colorant included therein.

[0050] It has also been surprisingly and unexpectedly found that, at least in accordance with some hair color base and/or hair color-altering compositions, buffering capacity of the disclosed buffer system plateaus and does not increase with increasing ammonium bicarbonate concentrations. Therefore, in at least certain embodiments, the hair color base does not include ammonium bicarbonate in an amount greater than about 3%, for example the amount of ammonium bicarbonate is not greater than about 2.75%, not greater than about 2.5%, not greater than about 2.25%, not greater than about 2%, not greater than about 1 .75%, not greater than about 1 .5%, not greater than about 1 .25%, not greater than about 1 %, or not greater than about 0.75% by weight, relative to the total weight of the hair color base.

[0051] In further embodiments, the hair color base does not include ammonium hydroxide in an amount greater than about 5%, for example the amount of ammonium hydroxide is not greater than about 4.5%, not greater than about 4%, not greater than about 3.75%, not greater than about 3.5%, not greater than about 3.25%, not greater than about 3%, not greater than about 2.75%, not greater than about 2.5%, not greater than about 2.25%, not greater than about 2%, not greater than about 1 .75%, or not greater than about 1 .5% by weight, relative to the total weight of the hair color base.

[0052] In still further embodiments, the effect of optionally including a small amount of monoethanolamine may be useful for neutralization of the buffer system, but in small amounts relative to the total amount of ammonium bicarbonate and ammonium hydroxide. However, at least in accordance with some hair color base and/or hair coloraltering compositions, increasing amounts of monoethanolamine has been found to decrease the buffering effect of the ammonium bicarbonate on the system. Therefore, in at least certain embodiments, the hair color base does not include monoethanolamine in an amount greater than about 3% or greater than about 2.5%, for example the amount of monoethanolamine is, in certain embodiments, not greater than about 2.25%, not greater than about 2%, not greater than about 1 .75%, not greater than about 1 .5%, not greater than about 1.25%, not greater than about 1%, or not greater than about 0.75% by weight, relative to the total weight of the hair color base.

Additional Components [0053] The hair color base may optionally comprise additional components, including, but not limited to, colorants, solvents, nonionic surfactants, fatty substances, rheology modifiers, cationic polymers, and/or auxiliary components, but the skilled person will choose such components with care to maintain a pH of the hair color base and/or the degree of lift imparted within an acceptable variation.

Colorant

[0054] The hair color base according to the disclosure may optionally comprise at least one colorant compound, or as an alternate embodiment, one or more colorants may be present in a separate composition that is mixed with the hair color base before use.

[0055] In various embodiments, the at least one colorant may be chosen from oxidation dyes, direct dyes, pigments, or mixtures thereof.

[0056] The oxidation dyes are generally chosen from one or more oxidation bases optionally combined with one or more couplers. By way of example, the oxidation bases are chosen from para-phenylenediamines, bis(phenyl)alkylenediamines, paraaminophenols, ortho-aminophenols, meta-aminophenols, and heterocyclic bases, and the addition salts thereof.

[0057] Among the para-phenylenediamines that may be mentioned, for example, are para-phenylenediamine, para-toluenediamine (toluene-2,5-diamine), 2-chloro-para- phenylenediamine, 2,3-dimethyl-para-phenylenediamine, 2,6-dimethyl-para- phenylenediamine, 2,6-diethyl-para-phenylenediamine, 2,5-dimethyl-para- phenylenediamine, N,N-dimethyl-para-phenylenediamine, N,N-diethyl-para- phenylenediamine, N,N-dipropyl-para-phenylenediamine, 4-amino-N,N-diethyl-3- methylaniline, N,N-bis(P-hydroxyethyl)-para-phenylenediamine, 4-N,N-bis(P- hydroxyethyl)amino-2-methylaniline, 4-N,N-bis(P-hydroxyethyl)amino-2-chloroaniline, 2-

P-hydroxyethyl-para-phenylenediamine, 2-methoxymethyl-para-phenylenediamine, 2- fluoro-para-phenylenediamine, 2-isopropyl-para-phenylenediamine, N-(P- hydroxypropyl)-para-phenylenediamine, 2-hydroxymethyl-para-phenylenediamine, N,N- dimethyl-3-methyl-para-phenylenediamine, N-ethyl-N-(P-hydroxyethyl)-para- phenylenediamine, N-(P,Y-dihydroxypropyl)-para-phenylenediamine, N-(4'- aminophenyl)-para-phenylenediamine, N-phenyl-para-phenylenediamine, 2-p- hydroxyethyloxy-para-phenylenediamine, 2-p-acetylaminoethyloxy-para- phenylenediamine, N-(P-methoxyethyl)-para-phenylenediamine, 4- aminophenylpyrrolidine, 2-thienyl-para-phenylenediamine, 2-p-hydroxyethylamino-5- aminotoluene and 3-hydroxy-1 -(4'-aminophenyl)pyrrolidine, hydroxypropyl bis(n- hydroxyethyl-p-phenylenediamine, and the addition salts thereof with an acid. [0058] Among the para-phenylenediamines mentioned above, paraphenylenediamine, para-toluenediamine, 2-isopropyl-para-phenylenediamine, 2-p- hydroxyethyl-para-phenylenediamine, 2-p-hydroxyethyloxy-para-phenylenediamine, 2,6- dimethyl-para-phenylenediamine, 2,6-diethyl-para-phenylenediamine, 2,3-dimethyl- para-phenylenediamine, N,N-bis(P-hydroxyethyl)-para-phenylenediamine, 2-chloro- para-phenylenediamine and 2-p-acetylaminoethyloxy-para-phenylenediamine, and the addition salts thereof with an acid, may be chosen.

[0059] Among the bis(phenyl)alkylenediamines that may be mentioned, for example, are N,N'-bis(P-hydroxyethyl)-N,N'-bis(4'-aminophenyl)-1 ,3-diaminopropanol, N,N'-bis(P- hydroxyethyl)-N,N'-bis(4'-aminophenyl)ethylenediamine, N,N'-bis(4- aminophenyl)tetramethylenediamine, N,N'-bis(P-hydroxyethyl)-N,N'-bis(4- aminophenyl)tetramethylenediamine, N,N'-bis(4- methylaminophenyl)tetramethylenediamine, N,N'-bis(ethyl)-N,N'-bis(4'-amino-3'- methylphenyl)ethylenediamine and 1 ,8-bis(2,5-diaminophenoxy)-3,6-dioxaoctane, and the addition salts thereof.

[0060] Among the para-aminophenols that may be mentioned, for example, are para-aminophenol, 4-amino-3-methylphenol, 4-amino-3-fluorophenol, 4-amino-3- chlorophenol, 4-amino-3-hydroxymethylphenol, 4-amino-2-methylphenol, 4-amino-2- hydroxymethylphenol, 4-amino-2-methoxymethylphenol, 4-amino-2-aminomethylphenol, 4-amino-2-(P-hydroxyethylaminomethyl)phenol and 4-amino-2-fluorophenol, and the addition salts thereof with an acid.

[0061] Among the ortho-aminophenols that may be mentioned, for example, are 2- aminophenol, 2-amino-5-methylphenol, 2-amino-6-methylphenol and 5-acetamido-2- aminophenol, and the addition salts thereof. Among the meta-aminophenols, 3- aminophenol and salts thereof, may be mentioned.

[0062] Among the heterocyclic bases that may be mentioned, for example, are pyridine derivatives, pyrimidine derivatives and pyrazole derivatives.

[0063] Among the pyridine derivatives that may be mentioned are the compounds described, for example, in patents GB 1 026 978 and GB 1 153 196, for instance 2,5- diaminopyridine, 2-(4-methoxyphenyl)amino-3-aminopyridine and 3,4-diaminopyridine, and the addition salts thereof.

[0064] Other pyridine oxidation bases that are useful in the present disclosure are the 3-aminopyrazolo[1 ,5-a]pyridine oxidation bases or the addition salts thereof described, for example, in patent application FR 2 801 308. Examples that may be mentioned include pyrazolo[1 ,5-a]pyrid-3-ylamine, 2-acetylaminopyrazolo[1 ,5-a]pyrid-3- ylamine, 2-morpholin-4-ylpyrazolo[1 ,5-a]pyrid-3-ylamine, 3-aminopyrazolo[1 ,5- a]pyridine-2-carboxylic acid, 2-methoxypyrazolo[1 ,5-a]pyrid-3-ylamine, (3- aminopyrazolo[1 ,5-a]pyrid-7-yl)methanol, 2-(3-aminopyrazolo[1 ,5-a]pyrid-5-yl)ethanol, 2-(3-aminopyrazolo[1 ,5-a]pyrid-7-yl)ethanol, (3-aminopyrazolo[1 ,5-a]pyrid-2-yl)methanol, 3,6-diaminopyrazolo[1 ,5-a]pyridine, 3,4-diaminopyrazolo[1 ,5-a]pyridine, pyrazolo[1 ,5- a]pyridine-3,7-diamine, 7-morpholin-4-ylpyrazolo[1 ,5-a]pyrid-3-ylamine, pyrazolo[1 ,5- a]pyridine-3,5-diamine, 5-morpholin-4-ylpyrazolo[1 ,5-a]pyrid-3-ylamine, 2-[(3- aminopyrazolo[1 ,5-a]pyrid-5-yl)(2-hydroxyethyl)amino]ethanol, 2-[(3-aminopyrazolo[1 ,5- a]pyrid-7-yl)(2-hydroxyethyl)amino]ethanol, 3-aminopyrazolo[1 ,5-a]pyridin-5-ol , 3- aminopyrazolo[1 ,5-a]pyridin-4-ol, 3-aminopyrazolo[1 ,5-a]pyridin-6-ol , 3- aminopyrazolo[1 ,5-a]pyridin-7-ol, 2-a-hydroxyethoxy-3-amino-pyrazolo[1 ,5-a]pyridine; 2- (4-dimethylpyperazinium-1 -yl)-3-amino-pyrazolo[1 ,5-a]pyridine; hydroxyethoxy aminopryazolopyridine, and the addition salts thereof.

[0065] More particularly oxidation bases that are useful in the present disclosure are selected from 3-aminopyrazolo-[1 ,5-a]-pyridines and optionally substituted on carbon atom 2 by: one (di)(Ci-C6)(alkyl)amino group wherein said alkyl group can be substituted by at least one hydroxy, amino, imidazolium group;

(a) one heterocycloalkyl group containing from 5 to 7 members chain, and from 1 to 3 heteroatomes, potentially cationic, potentially substituted by one or more (Ci-Ce)alkyl, such as di(Ci-C4)alkylpiperazinium; or

(b) one (Ci-Ce)alkoxy potentially substituted by one or more hydroxy groups such as a-hydroxyalkoxy, and the addition salts thereof.

[0066] Among the pyrimidine derivatives that may be mentioned are the compounds described, for example, in the patents DE 2359399; JP 88-169571 ; JP 05-63124; EP 0770375 or patent application WO 96/15765, such as 2,4,5,6-tetraaminopyrimidine, 4- hydroxy-2,5,6-triaminopyrimidine, 2-hydroxy-4,5,6-triaminopyrimidine, 2,4-dihydroxy- 5.6-diaminopyrimidine, 2,5,6-triaminopyrimidine and their addition salts and their tautomeric forms, when a tautomeric equilibrium exists.

[0067] Among the pyrazole derivatives that may be mentioned are the compounds described in the patents DE 3843892, DE 4133957 and patent applications WO 94/08969, WO 94/08970, FR-A-2 733 749 and DE 195 43 988, such as 4,5-diamino-1 - methylpyrazole, 4,5-diamino-1 -(0-hydroxyethyl)pyrazole, 3,4-diaminopyrazole, 4,5- diamino-1 -(4'-chlorobenzyl)pyrazole, 4,5-diamino-1 ,3-dimethylpyrazole, 4,5-diamino-3- methyl-1 -phenylpyrazole, 4,5-diamino-1 -methyl-3-phenylpyrazole, 4-amino-1 ,3- dimethyl-5-hydrazinopyrazole, 1 -benzyl-4,5-diamino-3-methylpyrazole, 4,5-diamino-3- tert-butyl-1 -methylpyrazole, 4,5-diamino-1 -tert-butyl-3-methylpyrazole, 4,5-diamino-1 -(0- hydroxyethyl)-3-methylpyrazole, 4,5-diamino-1 -ethyl-3-methylpyrazole, 4,5-diamino-1 - ethyl-3-(4'-methoxyphenyl)pyrazole, 4,5-diamino-1 -ethyl-3-hydroxymethylpyrazole, 4,5- diamino-3-hydroxymethyl-1 -methylpyrazole, 4,5-diamino-3-hydroxymethyl-1 -isopropyl- pyrazole, 4,5-diamino-3-methyl-1 -isopropylpyrazole, 4-amino-5-(2'-aminoethyl)amino- 1 ,3-dimethylpyrazole, 3,4,5-triaminopyrazole, 1 -methyl-3,4,5-triaminopyrazole, 3,5- diamino-1 -methyl-4-methylaminopyrazole, 3,5-diamino-4-(P-hydroxyethyl)amino-1 - methylpyrazole, and the addition salts thereof. 4,5-Diamino-1 -(0-methoxyethyl)pyrazole may also be used. According to some embodiments, 2,3-diaminodihydropyrazolo pyrazolone dimethosulfonate may also be used. Optionally, a 4,5-diaminopyrazole may be used, for example 4,5-diamino-1 -(0-hydroxyethyl)pyrazole and/or a salt thereof.

[0068] Pyrazole derivatives that may also be mentioned include diamino-N,N- dihydropyrazolopyrazolones and especially those described in patent application FR-A- 2 886 136, such as the following compounds and the addition salts thereof: 2,3-diamino-

6.7-dihydro-1 H,5H-pyrazolo[1 ,2-a]pyrazol-1 -one, 2-amino-3-ethylamino-6,7-dihydro-

1 H,5H-pyrazolo[1 ,2-a]pyrazol-1 -one, 2-amino-3-isopropylamino-6,7-dihydro-1 H,5H- pyrazolo[1 ,2-a]pyrazol-1 -one, 2-amino-3-(pyrrolidin-1 -yl)-6,7-dihydro- 1 H,5H- pyrazolo[1 ,2-a]pyrazol-1 -one, 4,5-diamino-1 ,2-dimethyl-1 ,2-dihydropyrazol-3-one, 4,5- diamino-1 ,2-diethyl- 1 ,2-dihydropyrazol-3-one, 4,5-diamino-1 ,2-di-(2-hydroxyethyl)-1 ,2- dihydropyrazol-3-one, 2-amino-3-(2-hydroxyethyl)amino-6,7-dihydro-1 H,5H- pyrazolo[1 ,2-a]pyrazol-1 -one, 2-amino-3-dimethylamino-6,7-dihydro-1 H,5H- pyrazolo[1 ,2-a]pyrazol-1 -one, 2,3-diamino-5,6,7,8-tetrahydro-1 H,6H-pyridazino[1 ,2- a]pyrazol-1 -one, 4-amino-1 ,2-diethyl-5-(py rrol idin- 1 -yl)-1 ,2-dihydropyrazol-3-one, 4- amino-5-(3-dimethylaminopyrrolidin-1 -yl)-1 ,2-diethyl- 1 ,2-dihydropyrazol-3-one, and 2,3- diamino-6-hydroxy-6,7-dihydro-1 H,5H-pyrazolo[1 ,2-a]pyrazol-1 -one. For example, 2,3- Diamino-6,7-dihydro-1 H,5H-pyrazolo[1 ,2-a]pyrazol-1 -one and/or a salt thereof may be used.

[0069] According to some embodiments, 2,3-diaminodihydropyrazolo pyrazolone dimethosulfonate may be used. 4,5-Diamino-1 -(P-hydroxyethyl)pyrazole and/or 2,3- diamino-6,7-dihydro-1 H,5H-pyrazolo[1 ,2-a]pyrazol-1 -one and/or a salt thereof may be used as heterocyclic bases.

[0070] Compositions according to the invention may optionally comprise one or more couplers advantageously chosen from those conventionally used in the dyeing or coloring of keratin fibers, e.g. hair. Among these couplers, mention may be made especially of meta-phenylenediamines, meta-aminophenols, meta-diphenols, naphthalene-based couplers and heterocyclic couplers, and also the addition salts thereof.

[0071] Mention may be made, for example, of 2-methyl-5-aminophenol, 5-N-(B- hydroxyethyl)amino-2-methylphenol, 3-aminophenol, 5-amino-6-chloro-o-cresol (3- amino-2-chloro-6-methylphenol), 1 ,3-dihydroxybenzene, 1 ,3-dihydroxy-2-methyl- benzene, 4-chloro-1 ,3-dihydroxybenzene, 2,4-diamino-1 -(B-hydroxyethyloxy)benzene (2,4 diaminophenoxyethanol HCL), 2-amino-4-(B-hydroxyethylamino)-1 -methoxy- benzene (2-methyl-5-hydroxyethylaminophenol), 1 ,3-diaminobenzene, 1 ,3-bis(2,4- diaminophenoxy)propane, 3-ureidoaniline, 3-ureido-1 -dimethylaminobenzene, sesamol, 1 -B-hydroxyethylamino-3,4-methylenedioxybenzene, a-naphthol, 2-methyl-1 -naphthol, 6-hydroxyindole, 4-hydroxyindole, 4-hydroxy-N-methylindole, 2-amino-3- hydroxypyridine, 6-hydroxybenzomorpholine, 3,5-diamino-2,6-dimethoxypyridine, 1 -N- (B-hydroxyethyl)amino-3,4-methylenedioxybenzene, 2,6-bis(B-hydroxyethylamino)- toluene, 6-hydroxyindoline, 2,6-dihydroxy-4-methylpyridine, 1 -H-3-methylpyrazol-5-one, 1 -phenyl-3-methylpyrazol-5-one, 2,6-dimethylpyrazolo[1 ,5-b]- 1 ,2,4-triazole, 2,6- dimethyl[3,2-c]-1 ,2,4-triazole, 4-amino-2-hydroxytoluene, 2-methylresorcinol, 4- chlororesorcinol, and 6-methylpyrazolo[1 ,5-a]benzimidazole, the addition salts thereof with an acid, or mixtures thereof.

[0072] In general, the addition salts of the oxidation bases and couplers that may be used in the context of the invention are especially selected from the addition salts with an acid such as the hydrochlorides, hydrobromides, sulfates, citrates, succinates, tartrates, lactates, tosylates, benzenesulfonates, phosphates and acetates. [0073] The oxidation base(s) may, for example, represent from 0.001% to 10% by weight relative to the total weight of the composition, such as from 0.005% to 5% by weight relative to the total weight of the composition.

[0074] The coupler(s), if they are present, each advantageously represent from 0.001 % to 10% by weight relative to the total weight of the composition, such as from 0.005% to 5% by weight relative to the total weight of the composition.

[0075] Compositions according to the invention may optionally comprise b) one or more synthetic or natural direct dyes, chosen from anionic and nonionic species, e.g. cationic or nonionic species, either as sole dyes or in addition to the oxidation dye(s).

[0076] Examples of suitable direct dyes that may be mentioned include azo direct dyes; (poly)methine dyes such as cyanins, hemicyanins and styryls; carbonyl dyes; azine dyes; nitro(hetero)aryl dyes; tri(hetero)arylmethane dyes; porphyrin dyes; phthalocyanin dyes, and natural direct dyes, alone or as mixtures.

[0077] In various embodiments, direct dyes are cationic direct dyes. Mention may be made of the hydrazono cationic dyes of formulas (Va) and (V’a), the azo cationic dyes (Via) and (Vl’a) and the diazo cationic dyes (Vila) below: in which formulas (Va), (V’a), (Via), (Vl’a) and (Vila):

• Het ⁺ represents a cationic heteroaryl radical, optionally bearing an endocyclic cationic charge, such as imidazolium, indolium or pyridinium, optionally substituted preferentially with one or more (Ci-Cs) alkyl groups such as methyl;

• Ar ⁺ representing an aryl radical, such as phenyl or naphthyl, bearing an exocyclic cationic charge, preferentially ammonium, particularly tri(Ci- C8)alkylammonium such as trimethylammonium;

• Ar represents an aryl group, especially phenyl, which is optionally substituted, preferentially with one or more electron-donating groups such as i) optionally substituted (Ci-C8)alkyl, ii) optionally substituted (Ci-C8)alkoxy, ill) (di)(Ci- C8)(alkyl)amino optionally substituted on the alkyl group(s) with a hydroxyl group, iv) aryl(Ci-C8)alkylamino, v) optionally substituted /V-(Ci-C8)alkyl-/V- aryl(Ci-C8)alkylamino or alternatively Ar represents a julolidine group;

• Ar’ is an optionally substituted divalent (hetero)arylene group such as phenylene, particularly para-phenylene, or naphthalene, which are optionally substituted, preferentially with one or more groups (Ci-C8)alkyl, hydroxyl or (Ci-C8)alkoxy;

• Ar” is an optionally substituted (hetero)aryl group such as phenyl or pyrazolyl, which are optionally substituted, preferentially with one or more groups (Ci- Cs)alkyl, hydroxyl, (di)(Ci-C8)(alkyl)amino, (Ci-C8)alkoxy or phenyl;

• R ^a and R ^b , which may be identical or different, represent a hydrogen atom or a group (Ci-C8)alkyl, which is optionally substituted, preferentially with a hydroxyl group; or alternatively the substituent R ^a with a substituent of Het ⁺ and/or R ^b with a substituent of Ar and/or R ^a with R ^b form, together with the atoms that bear them, a (hetero)cycloalkyl; particularly, R ^a and R ^b represent a hydrogen atom or a group (Ci-C4)alkyl, which is optionally substituted with a hydroxyl group;

• An ^_ represents an anionic counter-ion such as mesylate or halide.

[0078] In particular, mention may be made of the azo and hydrazono cationic dyes bearing an endocyclic cationic charge of formulae (Va), (V’a) and (Via) as defined previously. More particularly those of formulae (Va), (V’a) and (Via) derived from the dyes described in patent applications WO 95/15144, WO 95/01772 and EP-714954.

[0079] In various embodiments, the cationic part is derived from the following derivatives:

formulae (V-1 ) and (VI-1 ) with:

- R ¹ representing a (C1-C4) alkyl group such as methyl;

- R ² and R ³ , which are identical or different, represent a hydrogen atom or a (C1-

C4)alkyl group, such as methyl; and

- R ⁴ represents a hydrogen atom or an electron-donating group such as optionally substituted (Ci-C8)alkyl, optionally substituted (Ci-C8)alkoxy, or (di)(Ci- C8)(alkyl)amino optionally substituted on the alkyl group(s) with a hydroxyl group; particularly, R ⁴ is a hydrogen atom,

- Z represents a CH group or a nitrogen atom, preferentially CH;

- An ^_ represents an anionic counter-ion such as mesylate or halide.

[0080] In various embodiments, the dye of formulae (Va-1 ) and (Vla-1 ) is chosen from Basic Red 51 , Basic Yellow 87 and Basic Orange 31 or derivatives thereof:

[0081] Among the natural direct dyes that may be used according to the invention, mention may be made of lawsone, juglone, alizarin, purpurin, carminic acid, kermesic acid, purpurogallin, protocatechaldehyde, indigo, isatin, curcumin, spinulosin, apigenidin and orceins. Extracts or decoctions containing these natural dyes and in particular henna-based poultices or extracts may also be used.

[0082] When present, the direct dye(s) may, for example, be present in an amount ranging from 0.001% to 10% by weight, such as from 0.005% to 5% by weight of the total weight of the composition.

Solvents

[0083] The hair color base according to the disclosure may comprise a cosmetically acceptable solvent, for example as a dye support when a hair dye composition is contemplated. The cosmetically acceptable solvent can comprise water or a mixture of water and at least one cosmetically acceptable organic solvent.

[0084] As examples of organic solvents, non-limiting mentions can be made of monoalcohols and polyols such as ethyl alcohol, isopropyl alcohol, propyl alcohol, benzyl alcohol, and phenylethyl alcohol, or glycols or glycol ethers such as, for example, monomethyl, monoethyl and monobutyl ethers of ethylene glycol, propylene glycol or ethers thereof such as, for example, monomethyl ether of propylene glycol, butylene glycol, hexylene glycol, dipropylene glycol as well as alkyl ethers of diethylene glycol, for example monoethyl ether or monobutyl ether of diethylene glycol.

[0085] Other suitable examples of organic solvents are ethylene glycol, propylene glycol, butylene glycol, hexylene glycol, propane diol, and glycerin. The organic solvents for use according to the present disclosure can be volatile or non-volatile compounds.

[0086] When present, the organic solvent may be employed according to the present disclosure in an amount ranging from about 0.1 % to about 25% by weight, such as from about 1 % to about 15% by weight, or such as from about 2% to about 8% by weight, or such as from about 3% to about 7% by weight, or such as about 4% to 6% by weight, based on the total weight of the hair color base. For example, the hair color base may include 0.6% of a carbomer (4% solution).

[0087] In various exemplary embodiments, the cosmetically acceptable solvent may be employed according to the present disclosure in an amount ranging from about 1% to about 60% by weight, or such as from about 5% to about 30% by weight, such as from about 5% to about 25% by weight, or such as from about 5% to about 20% by weight, based on the total weight of the hair color base.

Nonionic Surfactant

[0088] The hair color base according to the disclosure can also further comprise at least one nonionic surfactant. Alternatively, one or more nonionic surfactants may be present in a separate composition that is mixed with the hair color base before use.

[0089] In general, nonionic surfactants having a Hydrophilic-Lipophilic Balance (HLB) of from 8 to 20, may be used in the present disclosure. Including at least one nonionic surfactant may help stabilize the hair color base and/or hair color composition when oxidative dye precursors are present in the composition. Thus, in certain embodiments, when colorant compounds such as oxidative dye precursors are present, at least one nonionic surfactant may also be present.

[0090] By way of example only, nonionic surfactants useful in the hair color bases of the present disclosure may be chosen from those disclosed in McCutcheon's "Detergents and Emulsifiers," North American Edition (1986), published by Allured Publishing Corporation; and McCutcheon's "Functional Materials," North American Edition (1992); both of which are incorporated by reference herein in their entirety. [0091] Examples of nonionic surfactants useful herein include, but are not limited to, alkoxylated derivatives of the following: fatty alcohols, alkyl phenols, fatty acids, fatty acid esters and fatty acid amides, wherein the alkyl chain is in the C12-C50 range, for example in the C16-C40 range, or in the C24 to C40 range, and having from about 1 to about 110 alkoxy groups. The alkoxy groups are selected from the group consisting of C2-C6 oxides and their mixtures, with ethylene oxide, propylene oxide, and their mixtures being useful examples. The alkyl chain may be linear, branched, saturated, or unsaturated. Of these alkoxylated non-ionic surfactants, the alkoxylated alcohols may be chosen, such as ethoxylated alcohols and propoxylated alcohols. The alkoxylated alcohols may be used alone or in mixtures thereof. The alkoxylated alcohols may also be used in mixtures with those alkoxylated materials disclosed herein-above.

[0092] Other representative examples of such ethoxylated fatty alcohols include laureth-3 (a lauryl ethoxylate having an average degree of ethoxylation of 3), laureth-23 (a lauryl ethoxylate having an average degree of ethoxylation of 23), ceteth-10 (a cetyl alcohol ethoxylate having an average degree of ethoxylation of 10) steareth-10 (a stearyl alcohol ethoxylate having an average degree of ethoxylation of 10), and steareth-2 (a stearyl alcohol ethoxylate having an average degree of ethoxylation of 2), steareth-20 (a stearyl alcohol ethoxylate having an average degree of ethoxylation of 20), steareth-100 (a stearyl alcohol ethoxylate having an average degree of ethoxylation of 100), beheneth-5 (a behenyl alcohol ethoxylate having an average degree of ethoxylation of 5), beheneth-10 (a behenyl alcohol ethoxylate having an average degree of ethoxylation of 10), and other derivatives and mixtures of the preceding.

[0093] Also available commercially are Brij® nonionic surfactants from Croda, Inc., Edison, N.J. Typically, Brij® is the condensation products of aliphatic alcohols with from about 1 to about 54 moles of ethylene oxide, the alkyl chain of the alcohol being typically a linear chain and having from about 8 to about 22 carbon atoms, for example, Brij® 72 (i.e., Steareth-2) and Brij® 76 (i.e., Steareth-10).

[0094] Also useful herein as nonionic surfactants are alkyl glycosides, which are the condensation products of long chain alcohols, e.g. C8-C30 alcohols, with sugar or starch polymers. These compounds can be represented by the formula (S)n -O-R wherein S is a sugar moiety such as glucose, fructose, mannose, galactose, and the like; n is an integer of from about 1 to about 1000, and R is a Cs-Cso alkyl group. Examples of long chain alcohols from which the alkyl group can be derived include decyl alcohol, cetyl alcohol, stearyl alcohol, lauryl alcohol, myristyl alcohol, oleyl alcohol, and the like. Examples of these surfactants are alkyl polyglucosides wherein S is a glucose moiety, R is a C8-C20 alkyl group, and n is an integer of from about 1 to about 9. Commercially available examples of these surfactants include decyl polyglucoside (available as APG® 325 CS) and lauryl polyglucoside (available as APG® 600 CS and 625 CS), all the above-identified polyglucosides APG® are available from BASF Corp. Also useful herein are sucrose ester surfactants such as sucrose cocoate and sucrose laurate.

[0095] Other nonionic surfactants suitable for use according to the present disclosure are glyceryl esters and polyglyceryl esters, including but not limited to, glyceryl monoesters, such as glyceryl monoesters of C16-C22 saturated, unsaturated and branched chain fatty acids such as glyceryl oleate, glyceryl monostearate, glyceryl monoisostearate, glyceryl monopalmitate, glyceryl monobehenate, or mixtures thereof, and polyglyceryl esters of C16-C22 saturated, unsaturated and branched chain fatty acids, such as polyglyceryl-4 isostearate, polyglyceryl-3 oleate, polyglyceryl-2 sesquioleate, triglyceryl diisostearate, diglyceryl monooleate, tetraglyceryl monooleate, or mixtures thereof.

[0096] Also useful herein as nonionic surfactants are sorbitan esters, e.g. sorbitan esters of C16-C22 saturated, unsaturated and branched chain fatty acids. Because of the manner in which they are typically manufactured, these sorbitan esters usually comprise mixtures of mono-, di-, tri-, etc. esters. Representative examples of suitable sorbitan esters include sorbitan monooleate (e.g., SPAN® 80), sorbitan sesquioleate (e.g., Arlacel® 83 from Croda, Inc., Edison, N.J.), sorbitan monoisostearate (e.g., GRILL® 6 from Croda, Inc., Edison, N.J.), sorbitan stearates (e.g., SPAN® 60), sorbitan trioleate (e.g., SPAN® 85), sorbitan tristearate (e.g., SPAN® 65), sorbitan dipalmitates (e.g., SPAN® 40), and sorbitan isostearate. Sorbitan monoisostearate and sorbitan sesquioleate may be used as emulsifiers.

[0097] Also suitable for use herein are alkoxylated derivatives of glyceryl esters, sorbitan esters, and alkyl polyglycosides, wherein the alkoxy groups is selected from the group consisting of C2-C6 oxides and their mixtures, such as ethoxylated or propoxylated derivatives of these materials. Nonlimiting examples of commercially available ethoxylated materials include TWEEN® (ethoxylated sorbitan mono-, di- and/or tri-esters of C12 to C18 fatty acids with an average degree of ethoxylation of from about 2 to about 20). According to some embodiments TWEEN®-21 (polyoxyethylene (4) sorbitan monolaurate) may be used. [0098] Nonionic surfactants may be those formed from a fatty alcohol, a fatty acid, or a glyceride with a C4 to C36 carbon chain, such as a C12 to C18 carbon chain, or a C16 to C18 carbon chain, derivatized to yield an HLB of at least 8. HLB is understood to mean the balance between the size and strength of the hydrophilic group and the size and strength of the lipophilic group of the surfactant. Such derivatives can be polymers such as ethoxylates, propoxylates, polyglucosides, polyglycerins, polylactates, polyglycolates, polysorbates, and others that would be apparent to one of ordinary skill in the art. Such derivatives may also be mixed polymers of the above, such as ethoxylate/propoxylate species, where the total HLB is optionally greater than or equal to 8. In various embodiments, the nonionic surfactants contain ethoxylate in a molar content of from 10- 25, such as from 10-20 moles.

[0099] When present, the surfactant will typically be present in the hair color base in an amount of from about 0.1% to about 45% by weight, such as from about 0.5% to 25% by weight, from about 1% to about 12% by weight, or from about 5% to about 9% by weight, based on the total weight of the hair color base.

Fatty Substances

[00100] The hair color base according to the disclosure may comprise at least one fatty substance. Alternatively, one or more fatty substances may be present in a separate composition that is mixed with the hair color base before use.

[00101] "Fatty substance" means an organic compound insoluble in water at normal temperature (25 °C) and at atmospheric pressure (750 mmHg) (solubility below 5% and such as below 1 % and further such as below 0.1%). Fatty substances have in their structure a chain of at least two siloxane groups or at least one hydrocarbon chain having at least 6 carbon atoms. Moreover, fatty substances are generally soluble in organic solvents in the same conditions of temperature and pressure, for example in chloroform, ethanol, benzene, or decamethylcyclopentasiloxane.

[00102] Fatty substances are, for example, chosen from alkanes, fatty alcohols, esters of fatty acid, esters of fatty alcohol, oils such as mineral, vegetable, animal and synthetic nonsilicone oils, non-silicone waxes, silicones, or mixtures thereof.

[00103] When present, the fatty compounds and/or oils will typically be present in the hair color base in an amount ranging from about 0.05% to about 30% by weight, such as from about 0.1% to 20% by weight, from about 1% to about 12% by weight, or from about 5% to about 9% by weight, based on the total weight of the hair color base. [00104] In some embodiments, the alcohols and esters have at least one linear or branched, saturated or unsaturated hydrocarbon group, comprising 6 to 30 carbon atoms, optionally substituted, for example, with at least one hydroxyl group (for example 1 to 4). If they are unsaturated, these compounds can have one to three, conjugated or unconjugated, carboncarbon double bonds.

[00105] With regard to the alkanes, in some embodiments, these have from 6 to 16 carbon atoms and are linear or branched, optionally cyclic. As examples, alkanes can be chosen from hexane and dodecane, isoparaffins such as isohexadecane, isododecane, and isodecane.

[00106] Non-limiting examples of non-silicone oils according to the disclosure, include: hydrocarbon oils of animal origin, such as perhydrosqualene; hydrocarbon oils of vegetable origin, such as liquid triglycerides of fatty acids having from 6 to 30 carbon atoms such as oleic acid, triglycerides of heptanoic or octanoic acids, or for example sunflower oil, maize oil, soya oil, cucurbit oil, grapeseed oil, sesame oil, hazelnut oil, apricot oil, macadamia oil, arara oil, sunflower oil, castor oil, avocado oil, triglycerides of caprylic/capric acids such as those sold by the company Stearineries Dubois or those sold under the names MIGLYOL® 810, 812 and 818 by the company Dynamit Nobel, jojoba oil, shea butter oil; hydrocarbons with more than 16 carbon atoms, linear or branched, of mineral or synthetic origin, such as paraffin oils, petroleum jelly, liquid paraffin, polydecenes, hydrogenated polyisobutene such as Parleam® fluorinated, partially hydrocarbon oils; as fluorinated oils, non-limiting examples include perfluoromethylcyclopentane and perfluoro-1 ,3-dimethylcyclohexane, sold under the names "FLUTEC® PC1" and "FLUTEC® PC3" by the company F2 Chemicals Ltd.; perfluoro-1 ,2- dimethylcyclobutane; perfluoroalkanes such as dodecafluoropentane and tetradecafluorohexane, sold under the names "PF 5050®" and "PF 5060®" by the 3M Company, or bromoperfluorooctyl sold under the name "FORALKYL®" by the company Atochem; nonafluoro-methoxybutane and nonafluoroethoxyisobutane; derivatives of perfluoromorpholine, such as 4-trifluoromethyl perfluoromorpholine sold under the name "PF 5052®" by the 3M Company.

[00107] The fatty alcohols usable as fatty substances according to the disclosure include, but are not limited to, non-alkoxylated, saturated or unsaturated, linear or branched, and have from 6 to 30 carbon atoms and more particularly from 8 to 30 carbon atoms. For example, cetyl alcohol, stearyl alcohol and their mixture (cetearyl alcohol), octyldodecanol, 2-butyloctanol, 2- hexyldecanol, 2-undecylpentadecanol, oleic alcohol or linoleic alcohol may be chosen.

[00108] The exemplary non-silicone wax or waxes that can be used in the composition of the disclosure are chosen from paraffin wax, carnauba wax, candelilla wax, and Alfa wax, paraffin wax, ozokerite, vegetable waxes such as olive wax, rice wax, hydrogenated jojoba wax or absolute waxes of flowers such as the essential wax of blackcurrant flower sold by the company BERTIN (France), animal waxes such as beeswaxes, or modified beeswaxes (cerabellina); other waxes or waxy raw materials usable according to the disclosure are, for example, marine waxes such as that sold by the company SOPHIM under reference M82, waxes of polyethylene or of polyolefins in general.

[00109] The exemplary fatty acid esters are the esters of saturated or unsaturated, linear or branched Ci-C ₂₆ aliphatic mono- or polyacids and of saturated or unsaturated, linear or branched Ci-C ₂₆ aliphatic mono- or polyalcohols, the total number of carbons of the esters being, for example, greater than or equal to 10.

[00110] Among the monoesters, non-limiting mentions can be made of dihydroabietyl behenate; octyldodecyl behenate; isocetyl behenate; cetyl lactate; Ci ₂ -Ci ₅ alkyl lactate; isostearyl lactate; lauryl lactate; linoleyl lactate; oleyl lactate; (iso)stearyl octanoate; isocetyl octanoate; octyl octanoate; cetyl octanoate; decyl oleate; isocetyl isostearate; isocetyl laurate; isocetyl stearate; isodecyl octanoate; isodecyl oleate; isononyl isononanoate; isostearyl palmitate; methyl acetyl ricinoleate; myristyl stearate; octyl isononanoate; 2-ethylhexyl isononate; octyl palmitate; octyl pelargonate; octyl stearate; octyldodecyl erucate; oleyl erucate; ethyl and isopropyl palmitates, ethyl-2-hexyl palmitate, 2-octyldecyl palmitate, alkyl myristates such as isopropyl, butyl, cetyl, 2-octyldodecyl, mirystyl, stearyl myristate, hexyl stearate, butyl stearate, isobutyl stearate; dioctyl malate, hexyl laurate, and 2-hexyldecyl laurate.

[00111] Further non-limiting mentions of esters can be made of the esters of C4-C ₂₂ di- or tricarboxylic acids and of CrC ₂₂ alcohols and the esters of mono-, di- or tricarboxylic acids and of C2-C ₂₆ di-, tri-, tetra- or pentahydroxy alcohols.

[00112] Even further non-limiting examples of esters include: diethyl sebacate; diisopropyl sebacate; diisopropyl adipate; di-n-propyl adipate; dioctyl adipate; diisostearyl adipate; dioctyl maleate; glyceryl undecylenate; octyldodecyl stearoyl stearate; pentaerythrityl monoricinoleate; pentaerythrityl tetraisononanoate; pentaerythrityl tetrapelargonate; pentaerythrityl tetraisostearate; pentaerythrityl tetraoctanoate; propylene glycol dicaprylate; propylene glycol dicaprate, tridecyl erucate; triisopropyl citrate; triisotearyl citrate; glyceryl trilactate; glyceryl trioctanoate; trioctyldodecyl citrate; trioleyl citrate, propylene glycol dioctanoate; neopentyl glycol diheptanoate; diethylene glycol diisanonate; and polyethylene glycol distearates.

[00113] Among the esters mentioned above, exemplary esters include ethyl, isopropyl, myristyl, cetyl, stearyl palmitates, ethyl-2-hexyl palmitate, 2-octyldecyl palmitate, alkyl myristates such as isopropyl, butyl, cetyl, 2-octyldodecyl myristate, hexyl stearate, butyl stearate, isobutyl stearate; dioctyl malate, hexyl laurate, 2-hexyldecyl laurate and isononyl isononanate, cetyl octanoate.

[00114] The composition can also comprise, as fatty ester, esters and di-esters of sugars of C ₆ -C ₃ o, such as Ci ₂ -C ₂₂ , fatty acids. "Sugar" as used in the disclosure means oxygen-containing hydrocarbon compounds that possess several alcohol functions, with or without aldehyde or ketone functions, and having at least 4 carbon atoms. These sugars can be monosaccharides, oligosaccharides, or polysaccharides.

[00115] As suitable sugars, non-limiting examples include sucrose, glucose, galactose, ribose, fucose, maltose, fructose, mannose, arabinose, xylose, lactose, and their derivatives, for example alkylated, such as methylated derivatives, e.g. methylglucose.

[00116] The esters of sugars and of fatty acids can, for example, be chosen from the esters or mixtures of esters of sugars described previously and of linear or branched, saturated or unsaturated C ₆ -C ₃ o, such as C12-C22, fatty acids. If they are unsaturated, these compounds can have one to three, conjugated or unconjugated, carbon-carbon double bonds.

[00117] The esters according to at least one embodiment can also be chosen from mono-, di-, tri- and tetra-esters, polyesters or mixtures thereof. These esters can be for example oleate, laurate, palmitate, myristate, behenate, cocoate, stearate, linoleate, linolenate, caprate, arachidonates, or mixtures thereof such as the oleo-palmitate, oleo-stearate, palmito-stearate mixed esters.

[00118] For example, the mono- and di-esters can be used, and such as the mono- or dioleate, stearate, behenate, oleopalmitate, linoleate, linolenate, oleostearate, of sucrose, of glucose or of methylglucose. Non-limiting mention can be made of the product sold under the name GLUCATE® DO by the company Amerchol, which is a dioleate of methylglucose.

[00119] Exemplary esters or of mixtures of esters of sugar of fatty acid include: the products sold under the names Crodesta™ F160, F140, F110, F90, F70, SL40 by the company Croda, Inc., Edison, N.J., denoting respectively the palmito-stearates of sucrose formed from 73% of monoester and 27% of di- and tri-ester, from 61% of monoester and 39% of di-, tri-, and tetraester, from 52% of monoester and 48% of di-, tri-, and tetra-ester, from 45% of monoester and 55% of di-, tri-, and tetra-ester, from 39% of monoester and 61% of di-, tri-, and tetra-ester, and the mono-laurate of sucrose; the products sold under the name Ryoto Sugar Esters for example with the reference B370 and corresponding to the behenate of sucrose formed from 20% of monoester and 80% of di-triester-polyester; sucrose mono-di-palmito-stearate marketed by the company Evonik under the name TEGOSOFT® PSE.

[00120] The silicones usable in the composition of the present disclosure include but are not limited to volatile or non-volatile, cyclic, linear or branched silicones, modified or not with organic groups.

[00121] The silicones usable according to the disclosure can be in the form of oils, waxes, resins or gums. In some embodiments, a mixture C30-45 alkyldimethylsilyl polypropylsilsesquioxane, available as SW-8005 C30 resin wax available from DOW CORNING®, and paraffin and may be included in the hair color base. [00122] In some embodiments, the silicone is chosen from the polydialkylsiloxanes, such as the polydimethylsiloxanes (PDMS), and the organo-modified polysiloxanes having at least one functional group selected from the poly(alkoxylated) groups, the amine groups and the alkoxy groups.

[00123] The organopolysiloxanes are defined in more detail in the work of Walter NOLL "Chemistry and Technology of Silicones" (1968), Academic Press. They can be volatile or nonvolatile.

[00124] When they are volatile, the silicones are, for example, chosen from those with a boiling point between 60°C. and 260°C, and for further examples, chosen from: cyclic polydialkylsiloxanes having from 3 to 7, such as from 4 to 5 silicon atoms. It can be, for example, the octamethylcyclotetrasiloxane marketed under the name VOLATILE SILICONE® 7207 by UNION CARBIDE or SILBIONE® 70045 V2 by RHODIA, the decamethylcyclopentasiloxane marketed under the name VOLATILE SILICONE® 7158 by UNION CARBIDE, and SILBIONE® 70045 V5 by RHODIA, or mixtures thereof.

[00125] Non-limiting mentions can also be made of the cyclocopolymers of the dimethylsiloxanes/methylalkylsiloxane type, such as SILICONE VOLATILE® FZ 3109 marketed by the company UNION CARBIDE, of the formula I:

CH ₃ CH ₃ with D'': - Si - O - witli D': - Si - O -

[00126] Non-limiting mentions can further be made of the mixtures of cyclic polydialkylsiloxanes with organic compounds derived from silicon, such as the mixture of octamethylcyclotetrasiloxane and tetratrimethylsilylpentaerythritol (50/50) and the mixture of octamethylcyclotetrasiloxane and oxy-1 ,r-(hexa-2,2,2',2',3,3'-trimethylsilyloxy) bisneopentane.

[00127] Other suitable volatile silicones include the linear volatile polydialkylsiloxanes having 2 to 9 silicon atoms and with a viscosity less than or equal to 5 x 10 ^-6 m ² /s at 25°C. An example is decamethyltetrasiloxane, marketed under the name "Toray SH 200 Fluid" by the company DOW CORNING®. Silicones included in this class are also described in the article published in Cosmetics and Toiletries, Vol. 91 , Jan. 76, p. 27-32--TODD BYERS "Volatile Silicone fluids for cosmetics".

[00128] Even further non-limiting mentions can be made of non-volatile polydialkylsiloxanes, gums and resins of polydialkylsiloxanes, polyorganosiloxanes modified with the aforementioned organofunctional groups, or mixtures thereof.

[00129] These silicones are, for example, chosen from the polydialkylsiloxanes, such as the polydimethylsiloxanes with trimethylsilyl end groups. The viscosity of the silicones is measured at 25°C according to standard ASTM 445 Appendix C.

[00130] Among these polydialkylsiloxanes, mention can be made of, non-exhaustively, the following commercial products: the SILBIONE® oils of series 47 and 70 047 or the MIRASIL® oils marketed by RHODIA, for example the oil 70 047 V 500 000; the oils of the MIRASIL® series marketed by the company RHODIA; the oils of the 200 series from the company DOW CORNING such as DC200; the VISCASIL® oils from GENERAL ELECTRIC and certain oils of the SF series (SF 96, SF 18) from GENERAL ELECTRIC.

[00131] Non-limiting mention can also be made of the polydimethylsiloxanes with dimethylsilanol end groups known under the name of dimethiconol (CTFA), such as the oils of the 48 series from the company RHODIA.

[00132] In this class of polydialkylsiloxanes, non-limiting mentions can be made of the products marketed under the names "ABIL WAX® 9800 and 9801" by the company Evonik, which are polydialkyl (C1-C20) siloxanes.

[00133] The silicone gums usable according to the disclosure are, for example, polydialkylsiloxanes, such as polydimethylsiloxanes with high number-average molecular weights between 200,000 and 1 ,000,000 used alone or mixed in a solvent. This solvent can be chosen from the volatile silicones, the polydimethylsiloxane (PDMS) oils, the polyphenylmethylsiloxane (PPMS) oils, the isoparaffins, the polyisobutylenes, methylene chloride, pentane, dodecane, tridecane, or mixtures thereof.

[00134] Products usable according to the disclosure are, for example, mixtures such as mixtures formed from a chain end hydroxylated polydimethylsiloxane, or dimethiconol (CTFA) and a cyclic polydimethylsiloxane also called cyclomethicone (CTFA), such as the product Q2 1401 marketed by the company DOW CORNING; mixtures of a polydimethylsiloxane gum and a cyclic silicone such as the product SF 1214 Silicone Fluid from the company GENERAL ELECTRIC, said product being a gum SF 30 corresponding to a dimethicone, having a numberaverage molecular weight of 500,000, dissolved in the oil SF 1202 Silicone Fluid corresponding to decamethylcyclopentasiloxane; mixtures of two PDMS of different viscosities, for example, of a PDMS gum and a PDMS oil, such as the product SF 1236 from the company GENERAL ELECTRIC. The product SF 1236 is a mixture of a gum SE 30 as defined above having a viscosity of 20 m ² /s and an oil SF 96 with a viscosity of 5 x 10 ^-6 m ² /s. This product, for example, has 15% of gum SE 30 and 85% of oil SF 96.

[00135] The organopolysiloxane resins usable according to the disclosure include but are not limited to crosslinked siloxane systems containing the units: R ₂ SiO2/ ₂ , R ₃ SiOi/ ₂ , RSiO ₃ /2, and/or SiO ₄ /2, in which R represents an alkyl having 1 to 16 carbon atoms. For example, R denotes a C1-C4 lower alkyl group such as methyl.

[00136] Among these resins, non-limiting mention can be made of the product marketed under the name "DOW CORNING 593" or those marketed under the names "SILICONE FLUID SS 4230 and SS 4267" by the company GENERAL ELECTRIC, which are silicones of dimethyl/trimethyl siloxane structure.

[00137] Non-limiting mention can also be made of the resins of the trimethylsiloxysilicate type, such as those marketed under the names X22-4914, X21 -5034 and X21 -5037 by the company SHIN-ETSU.

[00138] The organomodified silicones usable according to the disclosure include but are not limited to silicones as defined previously, having in their structure at least one organofunctional group fixed by a hydrocarbon group.

[00139] In addition to the silicones described above, the organomodified silicones can be polydiaryl siloxanes, such as polydiphenylsiloxanes, and polyalkyl-arylsiloxanes functionalized by the aforementioned organofunctional groups.

[00140] The polyalkarylsiloxanes are, for example, chosen from the polydimethyl/methylphenylsiloxanes, the polydimethyl/diphenylsiloxanes, linear and/or branched, with viscosity ranging from 1 x 10' ⁵ to 5 x 10 ² m ² /s at 250.

[00141] Among these polyalkarylsiloxanes, non-limiting mentins can be made of the products marketed under the following names: the SILBIONE® oils of series 70 641 from RHODIA; the oils of the series RHODORSIL® 70 633 and 763 from RHODIA; the oil DOW CORNING 556 COSMETIC GRADE FLUID from DOW CORNING; the silicones of the PK series from BAYER such as the product PK20; the silicones of the series PN, PH from BAYER such as the products PN1000 and PH1000; certain oils of the SF series from GENERAL ELECTRIC such as SF 1023, SF 1154, SF 1250, or SF 1265.

[00142] Among the organomodified silicones, non-limiting mention can be made of the polyorganosiloxanes having: polyoxyethylene and/or polyoxypropylene groups optionally with C6-C24 alkyl groups such as the products called dimethicone copolyol marketed by the company DOW CORNING under the name DC 1248 or the oils SILWET® L 722, L 7500, L 77, L 711 from the company UNION CARBIDE and the alkyl (Ci2)-methicone copolyol marketed by the company DOW CORNING under the name Q2 5200; substituted or unsubstituted amine groups such as the products marketed under the name GP 4 Silicone Fluid and GP 7100 by the company Genesee Polymers, or the products marketed under the names Q2 8220 and DOW CORNING 929 or 939 by the company DOW CORNING. The substituted amine groups are, for example, Ci-C ₄ aminoalkyl groups; alkoxylated groups, such as the product marketed under the name "SILICONE COPOLYMER F-755" by SWS SILICONES and ABIL WAX® 2428, 2434 and 2440 by the company Evonik.

[00143] For example, the fatty substance is chosen from compounds that are liquid or pasty at room temperature and at atmospheric pressure. For further example, the fatty substance is a compound that is liquid at a temperature of 25 °C and at atmospheric pressure.

[00144] The fatty substance is, for example, chosen from alkanes, fatty alcohols, esters of fatty acid, esters of fatty alcohol, hydrocarbons, silicones, non-silicone oils, and non-silicone waxes. The non-silicone oils may be selected from mineral, vegetable and synthetic oils.

[00145] According to at least one embodiment, the fatty substance is chosen from liquid paraffin, polydecenes, liquid esters of fatty acids and of fatty alcohols, or mixtures thereof. In some embodiments, the fatty substance is chosen from alkanes, hydrocarbons and silicones.

[00146] The liquid fatty substances are advantageously chosen from Ce-Ci6 alkanes, non-silicone oils of plant, mineral or synthetic origin, liquid fatty alcohols, liquid fatty acids and liquid esters of a fatty acid and/or of a fatty alcohol, or mixtures thereof. In various embodiments, the liquid fatty substance is chosen from liquid petroleum jelly, Ce-Ci6 alkanes, polydecenes, liquid esters of a fatty acid and/or of a fatty alcohol, and liquid fatty alcohols, or mixtures thereof.

[00147] One liquid fatty substance for use according to the present disclosure is mineral oil, which may be commercially available from the supplier Sonneborn under the tradename Kaydol® Heavy White Mineral Oil, from the supplier Exxonmobil Chemical under the tradename Primol™ 352, from Sonneborn under the tradename Blandol, from Armedsa under the tradename Aemoil M-302CG, or from Exxonmobil Chemical under the tradename Marcol 82.

[00148] According to some embodiments, a hair color base may include mineral oil and/or cetearyl alcohol as fatty substances. For example, the hair color base may include from about 2% to about 15% mineral oil, such as about 3% to about 7%, about 4% to about 6%, or about 5%, or such as about 8% to about 15%, about 10% to about 13%, or about 1 1% to about 12% mineral oil by weight, based on the total weight of the hair color base. The hair color base may include from about 2% to about 15% cetearyl alcohol, such as about 3% to about 7%, about 4% to about 6%, or about 5%, or such as about 8% to about 15%, about 10% to about 13%, or about 11% to about 12% cetearyl alcohol by weight, based on the total weight of the hair color base. In some embodiments, the hair color base may include approximately equal amounts of mineral oil and cetearyl alcohol.

[00149] In certain embodiments, the at least one fatty substance has a viscosity of about 50 mm ² /s or less at 40 °C (kinematic viscosity as measured by the ASTM D 445 method in units of mm ² /s at 40 ^q C). In other embodiments, the at least one fatty substance has a viscosity of greater than about 50 mm ² /s at 40 ^q C, and may be chosen from oils such as mineral oil (kinematic viscosity as measured by the ASTM D445 method in units of mm ² /s at 40 °C).

Rheology Modifiers

[00150] The hair color base may include at least one rheology modifier. Alternatively, one or more rheology modifiers may be present in a separate composition that is mixed with the hair color base before use.

[00151] In at least one embodiment, the rheology modifier is an acrylic polymer. When present, the at least one acrylic polymer may, for example, be selected from crosslinked copolymers of (meth)acrylic acid and/or (C1 -C6)alkyl esters and from acrylic associative polymers.

[00152] The expression "acrylic polymer" is understood, for the purposes of the present disclosure, to mean a polymer that results from the polymerization of one or more monomers.

[00153] The acrylic polymer of the present disclosure may also belong to a group of compounds known as acrylic thickening polymers.

[00154] The expression "thickening polymer" is understood, for the purposes of the present disclosure, to mean a polymer having, in solution or in dispersion containing 1% by weight of active material in water or in ethanol at 25 °C, a viscosity greater than 0.2 poise at a shear rate of 1 s’ ¹ . The viscosity can be measured with a HAAKE RS600 viscometer from THERMO ELECTRON. This viscometer is a controlled-stress viscometer with cone-plate geometry (for example having a diameter of 60 mm).

[00155] As used herein, the term "(meth)acrylic" acid and "(meth)acrylate" are meant to include the corresponding methyl derivatives of acrylic acid and the corresponding alkyl acrylate. For example, "(meth)acrylic)" acid refers to acrylic acid and/or methacrylic acid, and "(meth)acrylate" refers to alkyl acrylate and/or alkyl methacrylate.

[00156] In certain embodiments, the acrylic polymer of the present disclosure is selected from crosslinked copolymers of methacrylic acid and of a C1-C6 alkyl ester wherein the C1-C6 alkyl ester is a C1-C6 alkyl acrylate.

[00157] Methacrylic acid may be present in amounts ranging from 20% to 80% by weight, more particularly from 25% to 70% by weight, such as from 35% to 65% by weight, relative to the total weight of the copolymer. [00158] The alkyl acrylate may be present in amounts ranging from 15% to 80% by weight, such as from 25% to 75% by weight or from 35% to 65% by weight relative to the total weight of the copolymer. It may be chosen especially from methyl acrylate, ethyl acrylate and butyl acrylate and more particularly ethyl acrylate.

[00159] This copolymer may be partially or totally/substantially crosslinked with at least one standard polyethylenically unsaturated crosslinking agent, for instance polyalkenyl ethers of sucrose or of polyols, diallyl phthalates, divinylbenzene, allyl (meth)acrylate, ethylene glycol di(meth)acrylate, methylenebisacrylamide, trimethylolpropane tri(meth)acrylate, diallyl itaconate, diallyl fumarate, diallyl maleate, zinc (meth)acrylate, and castor oil or polyol derivatives manufactured from unsaturated carboxylic acids. The content of crosslinking agent generally ranges from 0.01% to 5% by weight, such as from 0.03% to 3% by weight or from 0.05% to 1% by weight, relative to the total weight of the copolymer.

[00160] In certain embodiments, the crosslinked copolymer of methacrylic acid and of a C1- C6 alkyl acrylate is slightly cross-linked. As used herein, the term “slightly crosslinked” refers to a partially crosslinked three-dimensional polymeric network.

[00161] In other certain embodiments, the crosslinked copolymer of methacrylic acid and of a C1-C6 alkyl acrylate is alkali-swellable. As used herein, the term “alkali-swellable” as it pertains to the acrylic polymer of the present disclosure refers to a polymer that when introduced to a solution, imparts little or no viscosity, but upon adjusting the pH to mildly acidic, neutral, or mildly basic conditions, a measurable increase in viscosity is observed, i.e., adding an alkali or neutralizing agent to a solution containing an alkali swellable polymer results in the development of viscosity.

[00162] The term “alkali-swellable” as used herein may also refer to the expansion of the polymer molecules upon neutralization as a result of charge repulsion of the anionic carboxylate groups of the polymer.

[00163] According to one form, the crosslinked copolymer of the invention may especially be in the form of a dispersion of particles in water.

[00164] One acrylic polymer of the present disclosure may be chosen from a crosslinked (meth)acrylic acid/ethyl acrylate copolymer, a cross-linked anionic acrylate polymer, or mixtures thereof.

[00165] According to one form, the acrylic polymer of the present disclosure selected from a crosslinked (meth)acrylic acid/ethyl acrylate copolymer and a cross-linked anionic acrylate polymer copolymer may especially be in the form of a dispersion in water. The mean size of the copolymer particles in the dispersion generally ranges from 10 to 500 nm, such as from 20 to 200 nm or from 50 to 150 nm.

[00166] In certain embodiments, the crosslinked (meth)acrylic acid/ethyl acrylate copolymer is a crosslinked methacrylic acid/ethyl acrylate copolymer, also known as an acrylates copolymer in aqueous dispersion, an example of which is a slightly cross-linked, alkali- swellable acrylate polymer known by the INCI name acrylates copolymer and commercially available from the supplier Lubrizol, under the trade name Carbopol® Aqua SF-1 as an aqueous dispersion comprising about 30% by weight of total solids or active material. Carbopol® Aqua SF-1 has a carboxyl functionality in its protonated form. This copolymer belongs to a class of synthetic rheology modifiers that include carboxyl functional alkali-swellable and alkali-soluble thickeners (ASTs). These thickener polymers are prepared from the free-radical polymerization of acrylic acid alone or in combination with other ethylenically unsaturated monomers. The polymers can be synthesized by solvent/precipitation as well as emulsion polymerization techniques.

[00167] Other suitable crosslinked (meth)acrylic acid/ethyl acrylate copolymers may be chosen from a crosslinked copolymer of methacrylic acid and of ethyl acrylate as an aqueous dispersion containing 38% active material, commercially available from the company Coatex under the name Viscoatex™ 538C or a crosslinked copolymer of acrylic acid and of ethyl acrylate as an aqueous dispersion containing 28% active material, commercially available from the company Rohm and Haas and sold under the name Aculyn™ 33.

[00168] In other embodiments, the acrylic polymer of the present disclosure is a cross-linked anionic acrylate polymer. The cross-linked anionic acrylate polymer may be contained in an aqueous dispersion comprising about 32% by weight of total solids. Examples of the crosslinked anionic acrylate polymer of the present disclosure include, but are not limited to, the polymer known by the INCI name acrylates crosspolymer-4 and commercially available from the supplier Lubrizol, under the tradename Carbopol® Aqua SF-2, as an aqueous dispersion comprising about 32% by weight of total solids or active material. Acrylates Crosspolymer-4 may also be described as a copolymer of acrylic acid, methacrylic acid or one of its simple esters, crosslinked with trimethylolpropane triacrylate.

[00169] In certain other embodiments, the acrylic polymer of the present disclosure is selected from acrylic associative polymers, also known as acryic associative thickeners. The expression "associative thickener" is understood according to the invention to mean an amphiphilic thickener comprising both hydrophilic units and hydrophobic units, in particular comprising at least one C8-C30 fatty chain and at least one hydrophilic unit.

[00170] Acrylic associative thickeners that may be used according to the invention are acrylic associative polymers selected from: (i) nonionic amphiphilic polymers comprising at least one fatty chain and at least one hydrophilic unit; (ii) anionic amphiphilic polymers comprising at least one hydrophilic unit and at least one fatty-chain unit; (iii) cationic amphiphilic polymers comprising at least one hydrophilic unit and at least one fatty-chain unit; (iv) amphoteric amphiphilic polymers comprising at least one hydrophilic unit and at least one fatty-chain unit; the fatty chains containing from 10 to 30 carbon atoms. [00171] Acrylic associative polymers may be chosen from acrylic anionic amphiphilic polymers such as those comprising at least one hydrophilic unit of unsaturated olefinic carboxylic acid type, and at least one hydrophobic unit of (C10-C30) alkyl ester of an unsaturated carboxylic acid type. They may be chosen from those in which the hydrophilic unit of unsaturated olefinic carboxylic acid type corresponds to the monomer of formula (II) below: in which formula R1 denotes H or CH3 or C2H5, i.e. acrylic acid, methacrylic acid or ethacrylic acid units, and the hydrophobic unit of which, of (C10-C30)alkyl ester of an unsaturated carboxylic acid type, corresponds to the monomer of formula (III) below: in which formula R1 denotes H or CH3 or C2H5 (i.e. acrylate, methacrylate or ethacrylate units) and preferably H (acrylate units) or CH3 (methacrylate units), R2 denoting a C10-C30 and preferably C12-C22 alkyl radical.

[00172] For example, (C10-C30) alkyl esters of unsaturated carboxylic acids according to the invention include lauryl acrylate, stearyl acrylate, decyl acrylate, isodecyl acrylate and dodecyl acrylate, and the corresponding methacrylates, lauryl methacrylate, stearyl methacrylate, decyl methacrylate, isodecyl methacrylate, and dodecyl methacrylate.

[00173] Anionic amphiphilic polymers of this type are disclosed and prepared, for example, according to the U.S. Pat. No. 3,915,921 and U.S. Pat. No. 4,509,949.

[00174] The anionic amphiphilic polymers that can be used in the context of the present disclosure may more particularly denote polymers formed from a mixture of monomers comprising:

(i) acrylic acid and one or more esters of formula (IV) below: in which R1 denotes H or CH3, R2 denoting an alkyl radical having from 12 to 22 carbon atoms, and a crosslinking agent, such as, for example, those constituted of from 95% to 60% by weight of acrylic acid (hydrophilic unit), 4% to 40% by weight of C10- C30 alkyl acrylate (hydrophobic unit), and 0 to 6% by weight of crosslinking polymerizable monomer, or 98% to 96% by weight of acrylic acid (hydrophilic unit), 1% to 4% by weight of C10-C30 alkyl acrylate (hydrophobic unit) and 0.1% to 0.6% by weight of crosslinking polymerizable monomer; and

(ii) essentially acrylic acid and lauryl methacrylate, such as the product formed from 66% by weight of acrylic acid and 34% by weight of lauryl methacrylate.

[00175] The crosslinking agent may be a monomer containing a group with at least one other polymerizable group whose unsaturated bonds are not conjugated relative to one another. Mention may be made in particular of polyallyl ethers such as, in particular, polyallyl sucrose and polyallyl pentaerythritol.

[00176] Among said polymers above, the products sold by the company Goodrich under the trade names Pemulen™ TR1 , Pemulen™ TR2, Carbopol® 1382, and the product sold by the company Coatex under the name Coatex SX®, may be chosen.

[00177] Thus, in some embodiments, the acrylic polymer of the present disclosure is selected from an acrylate polymer contained in an aqueous dispersion comprising about 30% by weight of active material. This acrylate polymer may be slightly cross-linked and alkali-swellable.

[00178] In other embodiments, the acrylic polymer of the present disclosure is selected from a cross-linked anionic acrylate polymer contained in an aqueous dispersion comprising about 32% by weight of active material.

[00179] In yet other embodiments, the acrylic polymer of the present disclosure is chosen from a slightly cross-linked, alkali-swellable acrylate polymer contained in an aqueous dispersion comprising about 30% by weight of active material, a cross-linked anionic acrylate polymer contained in an aqueous dispersion from comprising about 32% by weight of active material, or mixtures thereof. [00180] In some other embodiments, the acrylic polymer of the present disclosure is chosen from acrylic associative polymers, in particular, acrylic anionic amphiphilic polymers which can be selected from those comprising at least one hydrophilic unit of unsaturated olefinic carboxylic acid type, and at least one hydrophobic unit of (C10-C30) alkyl ester of an unsaturated carboxylic acid type.

[00181] In certain embodiments, the at least one acrylic polymer of the present disclosure may be a carbomer (4% solution) employed in an amount of from about 0.2% to about 1% by weight, such as from about 0.3% to about 0.0% by weight, from about 0.4% to about 0.8% by weight, or from about 0.5% to about 0.7%, such as at about 0.6% by weight, based on the total weight of the hair color base.

[00182] Thickening agents and rheology modifying polymers other than the abovedescribed acrylic polymers may be added, for example polymeric thickeners and/or non- polymeric thickeners. The polymeric thickener can be chosen from ionic or non-ionic, associative or non-associative polymers. Exemplary polymeric thickeners include various native gums. Representative non-polymeric thickening agents include oxyethylenated molecules and especially ethoxylated alkyl or acyl derivatives of polyols. These polymers can be modified physically or chemically.

[00183] When present, the at least one rheology modifier or thickening agent may be used in an amount of greater than 0% to about 15% by weight, such as from about 0.1 % to about 10% by weight, or from about 1% to about 5% by weight, based on the total weight of the hair color base.

Cationic Polymers

[00184] The compositions according to the present disclosure can also comprise at least one cationic polymer. The cationic polymer may be chosen from cationic associative polymers comprising, in their structure, a pendent or terminal hydrophobic chain, for example of alkyl or alkenyl type, containing from 10 to 30 carbon atoms.

[00185] The at least one cationic polymer of the compositions can also be chosen from the following:

(1 ) homopolymers and copolymers derived from acrylic or methacrylic esters or amides, examples of which are: copolymers of acrylamide and of dimethylaminoethyl acrylate quaternized with dimethyl sulfate or with a dimethyl halide, such as the product sold under the name HERCOFLOC by the company Hercules; the copolymers of acrylamide and of methacryloyloxyethyltrimethyl-ammonium chloride described, for example, in EP 80 976 and sold under the name BINA QUAT P 100 by the company Ciba Geigy; the copolymer of acrylamide and of methacryloyloxyethyltrimethylammonium methosulfate sold under the name RETEN by the company Hercules; quaternized or non-quaternized vinylpyrrolidone/ dialkylaminoalkyl acrylate or acrylate copolymers, such as the products sold under the name GAFQUAT by the company ISP, for instance GAFQUAT 734 or GAFQUAT 755, or alternatively the products known as COPOLYMER 845, 958 and 937, dimethylaminoethyl acrylate/ vinylcaprolactam/ vinylpyrrolidone terpolymers, such as the product sold under the name GAFFIX VC 713 by the company ISP; vinylpyrrolidone/methacrylamidopropyldimethylamine copolymers sold, for example, under the name STYLEZE CC 10 by ISP; quaternized vinylpyrrolidone/ dimethylaminopropylmethacrylamide copolymers such as the product sold under the name GAFQUAT HS 100 by the company ISP, and crosslinked polymers of methacryloyloxy(Ci-C4)alkyltri(Ci-C4)alkylammonium salts such as the polymers obtained by homopolymerization of dimethylaminoethyl acrylate quaternized with methyl chloride, or by copolymerization of acrylamide with dimethylaminoethyl acrylate quaternized with methyl chloride, the homo- or copolymerization being followed by crosslinking with a compound containing olefinic unsaturation, such as methylenebisacrylamide.

[00186] In at least one embodiment, a crosslinked acrylamide/ methacryloyloxyethyltrimethylammonium chloride copolymer (20/80 by weight) in the form of a dispersion containing 50% by weight of the copolymer in mineral oil can be used. This dispersion is sold under the name SALCARE® SC 92 by the company Ciba. In some embodiments, a crosslinked methacryloyloxyethyltrimethylammonium chloride homopolymer containing about 50% by weight of the homopolymer in mineral oil or in a liquid ester can be used. These dispersions are sold under the names SALCARE® SC 95 and SALCARE® SC 96 by the company Ciba.

[00187] Other examples are cellulose ether derivatives comprising quaternary ammonium groups, such as the polymers sold under the names JR (JR 400, JR 125, JR 30M) or LR (LR 400, LR 30M) by the company Union Carbide Corporation.

[00188] (2) Copolymers of cellulose or cellulose derivatives grafted with a water- soluble quaternary ammonium monomer, such as hydroxymethyl-, hydroxyethyl- or hydroxy-propylcelluloses grafted, for instance, with a methacryloylethyltrimethylammonium, methacrylamidopropyltrimethylammonium or dimethyldiallylammonium salt. These are sold under the name CELQUAT L 200 and CELQUAT H 100 by the company National Starch.

[00189] (3) Non-cellulose cationic polysaccharides, such as guar gums containing trialkylammonium cationic groups. Such products are sold, for example, under the trade names JAGUAR C13S, JAGUAR C15, JAGUAR C17 and JAGUAR 0162 by the company Meyhall.

[00190] (4) Polymers of piperazinyl units and of divalent alkylene or hydroxyalkylene radicals.

[00191] (5) Water-soluble polyamino amides prepared, for example, by polycondensation of an acidic compound with a polyamine; these polyamino amides can be crosslinked with an epihalohydrin, a diepoxide, a dianhydride, an unsaturated dianhydride, a bis-unsaturated derivative, a bis-halohydrin, a bis-azetidinium, a bis- haloacyldiamine, a bis-alkyl halide or alternatively with an oligomer resulting from the reaction of a difunctional compound which is reactive with a bis-halohydrin, a bis- azetidinium, a bis-haloacyldiamine, a bis-alkyl halide, an epihalohydrin, a diepoxide or a bis-unsaturated derivative; the crosslinking agent being used in an amount ranging from 0.025 to 0.35 mol per amine group of the polyamino amide; these polyamino amides can be alkylated or, if they contain at least one tertiary amine function, they can be quaternized. Exemplary mention may be made of the adipic acid/dimethylaminohydroxypropyl/diethylenetriamine polymers sold under the name CARTARETINE F, F4 or F8 by the company Sandoz.

[00192] (6) The polymers obtained by reaction of at least one polyalkylene polyamine containing two primary amine groups and at least one secondary amine group with a dicarboxylic acid chosen from diglycolic acid and saturated Cs-Cs aliphatic dicarboxylic acids. The molar ratio between the polyalkylene polyamine and the dicarboxylic acid ranges from 0.8:1 to 1.4:1 ; the polyamino amide resulting therefrom is reacted with epichlorohydrin in a molar ratio of epichlorohydrin relative to the secondary amine group of the polyamino amide ranging from 0.5:1 to 1.8:1. Polymers of this type are sold, for example, under the name HERCOSETT 57, PD 170 or DELSETTE 101 by the company Hercules.

[00193] (7) Cyclopolymers of alkyldiallylamine and of dialkyldiallylammonium, such as for example: dimethyldiallylammonium chloride homopolymer sold under the name MERQUAT® 100 and MERQUAT® 280 by the company Nalco (and its homologues of low weight-average molecular mass) and the copolymers of diallyldimethylammonium chloride and of acrylamide, sold under the name MERQUAT® 550.

[00194] (8) Quaternary diammonium polymers.

[00195] (9) Polyquaternary ammonium polymers; examples that may be mentioned include the products MIRAPOL A 15, MIRAPOL AD1 , MIRAPOL AZ1 and MIRAPOL 175 sold by the company Miranol.

[00196] (10) Quaternary polymers of vinylpyrrolidone and of vinylimidazole, for instance the products sold under the names LUVIQUAT FC 905, FC 550 and FC 370 by the company BASF.

[00197] (11 ) Vinylamide homopolymers or copolymers, such as partially hydrolysed vinylamide homopolymers such as poly(vinylamine/vinylamide)s.

[00198] (12) Cationic polyurethane derivatives, for example those of elastic nature formed from the reaction: (a1 ) of at least one cationic unit resulting from at least one tertiary or quaternary amine bearing at least two reactive functions containing labile hydrogen; (a2) of at least one mixture of at least two different nonionic units bearing at least two reactive functions containing labile hydrogen, for instance chosen from hydroxyl groups, primary or secondary amine groups, and thiol groups; and (b) of at least one compound comprising at least two isocyanate functions.

[00199] (13) Other cationic polymers that may be used in the context of the disclosure include, for example, cationic proteins or cationic protein hydrolysates, polyalkyleneimines, such as polyethyleneimines, polymers containing vinylpyridine or vinylpyridinium units, and chitin derivatives.

[00200] Particularly useful cationic polymers in the present disclosure include, but are not limited to, polyquaternium 4, polyquaternium 6, polyquaternium 7, polyquaternium 10, polyquaternium 11 , polyquaternium 16, polyquaternium 22, polyquaternium 28, polyquaternium 32, polyquaternium-46, polyquaternium-51 , polyquaternium-52, polyquaternium- 53, polyquaternium-54, polyquaternium-55, polyquaternium-56, polyquaternium-57, polyquaternium-58, polyquaternium-59, polyquaternium-60, polyquaternium-63, polyquaternium- 64, polyquaternium-65, polyquaternium-66, polyquaternium-67, polyquaternium-70, polyquaternium-73, polyquaternium-74, polyquaternium-75, polyquaternium-76, polyquaternium- 77, polyquaternium-78, polyquaternium-79, polyquaternium-80, polyquaternium-81 , polyquaternium-82, polyquaternium-84, polyquaternium-85, polyquaternium-86, polyquaternium- 87, polyquaternium-90, polyquaternium-91 , polyquaternium-92, polyquaternium-94, and guar hydroxypropyltrimonium chloride. [00201] Useful cationic polymers include POLYMER JR-125, POLYMER JR-400, Polymer JR-30M hydroxyethyl cellulosic polymers (polyquaternium 10) available from AMERCHOL; JAGUAR C® 13-S, guar hydroxypropyltrimonium chloride, available from Rhodia; and MERQUAT® 100 and 280, a dimethyl dialkyl ammonium chloride (polyquaternium 6) available from Nalco.

[00202] When present, the cationic polymer may be present in an amount of greater than 0% to about 5%, such as from about 0.25% to about 3% by weight, or from about 0.5% to about 1 .5% by weight, based on the total weight of the hair color base.

Auxiliary Components

[00203] The hair color base according to the disclosure can comprise any auxiliary or additional component suitable for use in cosmetic compositions, and in particular suitable for hair coloring or lightening compositions. Alternatively, one or more auxiliary or additional component may be present in a separate composition that is mixed with the hair color base before use.

[00204] Such components may include, but are not limited to, silicone compounds, thickening agents or rheology modifiers other than described above, anionic, cationic, nonionic, amphoteric or zwitterionic surfactants or mixtures thereof, anionic, cationic, nonionic, amphoteric or zwitterionic polymers or mixtures, film forming agents or polymers, humectants and moisturizing agents, fatty substances, emulsifying agents other than fatty substances, fillers, structuring agents, propellants, shine agents, conditioning agents, antioxidants or reducing agents, penetrants, sequestrants, fragrances, buffers, dispersants, conditioning agents, for instance volatile or non-volatile, modified or unmodified silicones, ceramides, preserving agents, opacifiers, sunscreen agents, pH adjusters, and antistatic agents. Acids, for example citric acid, can affect the pH of the system resulting in loss of lift. As such, optional auxiliary or additional components will be chosen so as to minimize any detrimental effect to the advantages of the hair color bases and compositions described herein.

[00205] According to some embodiments the antistatic agent may include a hexadimethrine chloride polymer. In various embodiments, the sequestering agents may include ethylenediaminetetraacetic acid (EDTA) or its conjugate base.

[00206] Typically, the foregoing optional components may be present in amounts up to about 25%, such as about 0.1% to about 20%, or about 1% to about 10%, by weight of the hair color base, when present, although different amounts are also contemplated. Hair Color Altering Composition

[00207] The disclosure also relates to compositions for altering the color of hair. The hair color altering compositions comprise a buffer system or hair color base according to the disclosure, and an oxidizing component. Accordingly, hair color altering compositions according to the disclosure comprise ammonium hydroxide, ammonium bicarbonate, at least one oxidizing component, and optionally monoethanolamine.

[00208] In various embodiments, hair color altering compositions may be prepared by mixing a buffer system or hair color base according to the disclosure with an oxidizing component. For example, a hair color base comprising a buffer system according to the disclosure may be mixed with an oxidizing component in a ratio of hair color base:oxidizing component ranging from about 1 :1 to about 1 :10, such as from about 1 :1 to about 1 :4, from about 1 :1 to about 1 :3, or from about 1 :1 to about 1 :2. The mixing ratio of hair color base to oxidizing component may be, for example, about 1 :1 , about 1 :2, about 1 :3, or about 1 :4.

Oxidizing Component

[00209] The hair color composition according to the disclosure comprises at least one oxidizing component. The oxidizing component may be an oxidizing agent, or may be a composition comprising an oxidizing agent (“oxidizing composition”), which terms are used interchangeably in some instances herein, without intending to be limiting.

Oxidizing Agents

[00210] The oxidizing agent may be, for example, chosen from peroxides, persulfates, perborates, percarbonates, alkali metal bromates, ferricyanides, peroxygenated salts, or a mixture thereof. Oxidizing agents that may also be used include at least one redox enzyme such as laccases, peroxidases, and 2-electron oxidoreductases, such as uricase, where appropriate in the presence of their respective donor or co-factor. Oxygen in the air may also be an oxidizing component.

[00211] In certain embodiments, the oxidizing agent is hydrogen peroxide. In various embodiments the hydrogen peroxide may be present in an aqueous solution whose titer may range from 1 to 40 volumes, such as from 5 to 40 volumes, from 5 to 30 volumes, or from 5 to 20 volumes. In certain embodiments, the oxidizing component is a 20V, 30V, or 40V hydrogen peroxide oxidizing composition. [00212] In other embodiments, the oxidizing agent is a persulfate and/or a monopersulfate such as, for example, potassium persulfate, sodium persulfate, ammonium persulfate, as well as mixtures thereof. In some embodiments, the oxidizing agents are chosen from hydrogen peroxide, potassium persulfate, sodium persulfate, or mixtures thereof.

Oxidizing Compositions

[00213] When the oxidizing component is an oxidizing composition, the oxidizing agent may, in various embodiments, be present in an amount of from about 0.05% to about 50% by weight, such as from about 0.1% to about 30% by weight, from about 0.1 % to about 20% by weight, about 1 % to about 20%, about 1% to about 15%, about 1% to about 12%, about 3% to about 20%, about 3% to about 15%, about 3% to about 12%, about 5% to about 20%, about 5% to about 15%, about 5% to about 12%, about 7% to about 20%, about 7% to about 15%, about 7% to about 12%, about 9% to about 20%, about 9% to about 15%, or about 9% to about 12% by weight, based on the total weight of the oxidizing composition. The total amount of oxidizing agent in the oxidizing composition is preferably at least about 7%, at least about 8%, at least about 9%, at least about 10%, at least about 11 %, or at least about 11 .5%, such as at 8% to about 12%, about 9% to about 12%, about 10% to about 12%, about 11 % to about 12%, or is about 9%, about 10%, about 1 1%, or about 12%, or about 1 % to about 10% by weight, based on the total weight of the oxidizing composition.

[00214] The oxidizing composition can contain at least one solvent, for example water, organic solvents, or mixtures thereof. Suitable organic solvents for use in the oxidizing composition, alone or in mixture with water, include but are not limited to ethanol, isopropyl alcohol, propanol, benzyl alcohol, phenyl ethyl alcohol, glycols and glycol ethers, such as propylene glycol, hexylene glycol, ethylene glycol monomethyl, monoethyl or monobutyl ether, propylene glycol and its ethers, such as propylene glycol monomethyl ether, butylene glycol, dipropylene glycol, diethylene glycol alkyl ethers, such as diethylene glycol monoethyl ether and monobutyl ether, ethylene glycol, propylene glycol, butylene glycol, hexylene glycol, propane diol, glycerin, hydrocarbons such as straight chain hydrocarbons, mineral oil, polybutene, hydrogenated polyisobutene, hydrogenated polydecene, polydecene, squalane, petrolatum, isoparaffins, or mixtures thereof. [00215] The organic solvents for use according to the present disclosure can be volatile or non-volatile compounds. The organic solvent may, for example, be present in an amount ranging from about 0.5% to about 70% by weight, such as from about 2% to about 60% by weight, such as from about 5 to about 50% by weight, relative to the total weight of the oxidizing composition.

[00216] The oxidizing composition may optionally include at least one non-ionic surfactant. Non-limiting classes of nonionic surfactants include esters of polyols with fatty acids and alkoxylated derivatives thereof, alkylpolyglucosides, sucrose esters, alkoxylated ethers of fatty acids and glucose or alkylglucose, esters of fatty acids and glucose or alkylglucose, sorbitol esters of fatty acids and alkoxylated derivatives thereof, alkoxylated fatty alcohols (for example, ethoxylated fatty alcohols), alkanolamides, or mixtures thereof.

[00217] For example, the oxidizing composition may comprise at least one alkoxylated, e.g. ethoxylated, fatty alcohol or derivative thereof, having a carbon chain of C5 or greater, such as, for example, C8 or greater, C10 or greater, and C12 or greater. The at least one fatty alcohol may be chosen from, for example, C9-C11 alcohols, C12-C13 alcohols, C12-C15 alcohols, C12-C16 alcohols, or C14-C15 alcohols, or may be chosen from arachidyl alcohol, behenyl alcohol, caprylic alcohol, cetearyl alcohol, cetyl alcohol, coconut alcohol, decyl alcohol, hydrogenated tallow alcohol, jojoba alcohol, lauryl alcohol, myristyl alcohol, oleyl alcohol, palm alcohol, palm kernel alcohol, stearyl alcohol, tallow alcohol, and tridecyl alcohol. Non-limiting examples of alkoxylated fatty alcohols include Non-limiting examples of the at least one alkoxylated fatty alcohol include ceteareth-2, ceteareth-3, ceteareth-4, ceteareth-5, ceteareth-6, ceteareth-7, ceteareth-8, ceteareth-9, ceteareth-10, ceteareth-1 1 , ceteareth-12, ceteareth-13, ceteareth-14, ceteareth-15, ceteareth-16, ceteareth-17, ceteareth-18, ceteareth-20, ceteareth-22, ceteareth-23, ceteareth-24, ceteareth-25, ceteareth-27, ceteareth-28, ceteareth-29, ceteareth-30, ceteareth-33, ceteareth-34, ceteareth-40, ceteareth-50, ceteareth-55, ceteareth-60, ceteareth-80, ceteareth-100, laureth-1 , laureth-2, laureth-3, laureth-4, laureth-5, laureth-6, laureth-7, laureth-8, laureth-9, laureth-10, laureth-11 , laureth-12, laureth-13, laureth-14, laureth-15, laureth-16, laureth- 20, laureth-23, laureth-25, laureth-30, laureth-40, deceth-3, deceth-5, oleth-5, oleth-30, steareth-2, steareth-10, steareth-20, steareth-100, cetylsteareth-12, ceteareth-5, ceteareth-5, polyglyceryl 4-lauryl ether, polyglyceryl 4-oleyl ether, polyglyceryl 2-oleyl ether, polyglyceryl 2-cetyl ether, polyglyceryl 6-cetyl ether, polyglyceryl 6-oleylcetyl ether, polyglyceryl 6-octadecyl ether, C9-C1 1 pareth-3, C9-C11 pareth-6, C11 -C15 pareth-3, C1 1 -C15 pareth-5, C11 -C15 pareth-12, C11 -C15 pareth-20, C12-C15 pareth- 9, C12-C15 pareth-12, and C22-C24 pareth-33, or mixtures thereof. Optionally, the at least one fatty alcohol may be chosen as a mixture or compound with the non- alkoxylated fatty alcohol. For example, the non-ionic surfactant may comprise ceteareth-25 and cetearyl alcohol.

[00218] As a further example, the oxidizing composition may comprise at least one alkyl glycoside, which are the condensation products of long chain alcohols, e.g. C8- C30 alcohols, with sugar or starch polymers. These compounds can be represented by the formula (S)n — O — R wherein S is a sugar moiety such as glucose, fructose, mannose, galactose, and the like; n is an integer of from about 1 to about 1000, and R is a C8-C30 alkyl group. Examples of long chain alcohols from which the alkyl group can be derived include decyl alcohol, cetyl alcohol, stearyl alcohol, lauryl alcohol, myristyl alcohol, oleyl alcohol, and the like. Preferred examples of these surfactants are alkyl polyglucosides wherein S is a glucose moiety, R is a C8-C20 alkyl group, and n is an integer of from about 1 to about 9. Commercially available examples of these surfactants include decyl polyglucoside and lauryl polyglucoside. Also useful herein are sucrose ester surfactants such as sucrose cocoate and sucrose laurate.

[00219] As a still further example, glyceryl esters and polyglyceryl esters may be chosen, such as glyceryl monoesters, preferably glyceryl monoesters of C16-C22 saturated, unsaturated and branched chain fatty acids such as glyceryl oleate, glyceryl monostearate, glyceryl monoisostearate, glyceryl monopalmitate, glyceryl monobehenate, and mixtures thereof, and polyglyceryl esters of C16-C22 saturated, unsaturated and branched chain fatty acids, such as polyglyceryl-4 isostearate, polyglyceryl-oleate, polyglyceryl-2 sesquioleate, triglyceryl diisostearate, diglyceryl monooleate, tetraglyceryl monooleate, or mixtures thereof.

[00220] Also useful herein as nonionic surfactants are sorbitan esters. Preferable are sorbitan esters of C16-C22 saturated, unsaturated and branched chain fatty acids. Because of the manner in which they are typically manufactured, these sorbitan esters usually comprise mixtures of mono-, di-, tri-, etc. esters. Representative examples of suitable sorbitan esters include sorbitan monooleate, sorbitan sesquioleate, sorbitan monoisostearate, sorbitan stearates, sorbitan trioleate, sorbitan tristearate, sorbitan dipalmitates, and sorbitan isostearate. [00221] If present, the amount of non-ionic surfactant may range from about 0.1% to about 10%, such as about 1 % to about 10%, about 1 % to about 8%, about 1% to about 6%, or about 2% to about 4% by weight, relative to the total weight of the oxidizing composition. In certain embodiments, the amount of non-ionic surfactant ranges from about 0.1% to about 6%, about 0.1% to about 5%, about 0.1% to about 4%, about 0.1% to about 3%, 0.5% to about 6%, about 0.5% to about 5%, about 0.5% to about 4%, about 0.5% to about 3%, about 1% to about 6%, about 1% to about 5%, about 1% to about 4%, about 1% to about 3%, about 1.5% to about 6%, about 1.5% to about 5%, about 1 .5% to about 4%, about 1 .5% to about 3%, about 2% to about 6%, about 2% to about 5%, about 2% to about 4%, about 2% to about 3%, or about 2.5% to about 3.5% by weight, based on the total weight of the oxidizing composition.

[00222] The oxidizing compositions may optionally include other components typically used in oxidizing compositions, such as, for example, rheology-modifying agents, chelants, fatty substances, ceramides, pH adjusting agents, preservatives, fragrances, surfactants other than non-ionic surfactants, etc.

[00223] The oxidizing composition may be in the form of a powder, gel, liquid, foam, lotion, cream, mousse, or emulsion. In certain embodiments the oxidizing composition is aqueous and is in the form of a liquid, cream, or emulsion. In other embodiments, the oxidizing composition is anhydrous or substantially anhydrous.

[00224] The pH of the oxidizing composition can range from about 2 to about 12, such as from about 6 to about 11 , and it may be adjusted to the desired value using acidifying/alkalizing agents that are well known in the art. In certain embodiments, the pH of the oxidizing composition is above 7. In other embodiments the pH of the oxidizing composition may be below 7, such as from about 2 to about 6, or from about 3 to about 5.

Buffer Systems

[00225] The hair color altering compositions comprise buffer systems according to the disclosure. The buffer systems may be employed directly in the hair color altering compositions, or may be present in the hair color altering compositions as part of a hair color base comprising one or more additional components, according to the disclosure.

[00226] Typically, the components of the buffer systems according to the disclosure may be present in the hair color altering compositions in the same amounts as described for the hair color base, or in higher or lower amounts. For example, the hair color altering composition may comprise from about 0.1% to about 10% of ammonium hydroxide, preferably about 0.5% to about 8%, more preferably from about 0.75% to about 5%, most preferably from about 1% to about 4%; from about 0.1% to about 5% of ammonium bicarbonate, preferably about 0.2% to about 4%, more preferably from about 0.3% to about 2%, most preferably from about 0.5% to about 1.25%; and optionally, from about 0.01% to about 5% of monoethanolamine, preferably from about 0.1 % to about 3%, more preferably from about 0.25% to about 2.5%, most preferably from about 0.5% to about 1.25%, wherein all amounts are by weight, based on the total weight of the hair color altering composition.

[00227] As a further example, each of the ammonium hydroxide, ammonium bicarbonate, and optionally monoethanolamine may be present in the hair color altering composition in approximately 1/2 the amount(s) described herein for the hair color base, when the hair color altering composition is prepared by mixing a buffer system or hair color base composition with an oxidizing component at a ratio of (buffer system or hair color base comprising the buffer system):oxidizing component of about 1 :1 , may be present in 1/3 the amount(s) described for the hair color base (mixing ratio of about 1 :2), may be present in 1/4 the amount(s) described for the hair color base (mixing ratio of about 1 :3), may be present in 1/5 the amount(s) described for the hair color base (mixing ratio of about 1 :4), and so on.

[00228] In various embodiments, the weight ratio of ammonium bicarbonate to ammonium hydroxide in the hair color altering composition may be less than or equal to about 1 , such as less than or equal to about 0.75, or less than or equal to about 0.5, for example may be about 0.4, about 0.39, about 0.38, about 0.37, about 0.36, about 0.35, about 0.34, about 0.33, about 0.32, about 0.31 , about 0.3, about 0.29, about 0.28, about 0.27, about 0.26, or about 0.25. In certain embodiments, the hair color altering composition may comprise ammonium bicarbonate and ammonium hydroxide in a weight ratio of ammonium bicarbonate:ammonium hydroxide ranging from about 1 :1 to about 1 :5, from about 1 :1.1 to about 1 :3, from about 1 :1.5 to about 1 :4, from about 1 :1 .75 to about 1 :3.5, from about 1 :2 to about 1 :3.25, or from about 1 :2.5 to about 1 :3. In other embodiments, the weight ratio of ammonium bicarbonate to ammonium hydroxide in the hair color altering composition may range from about 1 :2.6 to about 1 :3, about 1 :2.7 to about 1 :3, about 1 :2.8 to about 1 :3, or about 1 :2.9 to about 1 :3, or may be about 1 :2.6, about 1 :2.7, about 1 :2.8, about 1 :2.9, or about 1 :3. [00229] If monoethanolamine is present, the hair color altering composition may comprise amounts of monoethanolamine, ammonium bicarbonate, and ammonium hydroxide such that the hair color altering composition has a weight ratio of monoethanolamine:(ammonium bicarbonate + ammonium hydroxide) ranging from about 1 :>1 to about 1 :20 or from about 1 :2 to 1 :5, such as, for example about 1 :6 to about 6:1 , about 1 :5.5 to about 5.5:1 , about 1 :5 to about 5:1 , about 1 :4 to about 4:1 , about 1 :3 to about 3:1 , about 1 :2.5 to about 2.5:1 , about 1 :2 to about 2:1 , about 1 :1 .5 to about 1.5:1 , or about 1 :1.3 to about 1.3:1 , such as, for example, about 1 :5.4 or about 1 .27:1 . In some embodiments, the hair color altering composition has a weight ratio of monoethanolamine:(ammonium bicarbonate + ammonium hydroxide) ranging from about 1 :7 to about 1 .6:1 , or about 1 :6 to about 1 .3:1 .

[00230] In various embodiments, hair color altering compositions have a molar ratio of ammonium hydroxide to ammonium bicarbonate from about 0.3 to about 2, such as, for example from about 0.4 to about 1 .75 or about 0.5 to about 1 .5. In other embodiments, hair color altering compositions have a molar ratio of ammonium hydroxide to ammonium bicarbonate from about 0.75 to about 1 .75, such as, for example from about 1 to about 1 .5, about 1 .1 to about 1 .4, about 1 .2 to about 1 .3, or about 1 .25 to about 1 .3. For example, the hair color altering compositions may have a molar ratio of ammonium hydroxide to ammonium bicarbonate of about 1 , about 1.1 , about 1.15, about 1 .2, about 1.25, about 1.3, about 1.35, about 1.4, about 1.45, or about 1.5. In a particularly preferred embodiment, the molar ratio of ammonium hydroxide to ammonium bicarbonate ranges from about 1 .25 to about 1 .3.

Additional Components

[00231] The hair color altering compositions may optionally comprise any of the additional components described above for the hair color base compositions, including, but not limited to, colorants, solvents, nonionic surfactants, fatty substances, rheology modifiers, cationic polymers, and/or auxiliary components. Such additional components may be present in the hair color altering compositions as part of the hair color altering compositions, or may be present in the hair color altering compositions as part of a hair color base that is added to the hair color altering composition.

[00232] The amounts of each such additional component may be present in the hair color altering composition in the same amounts as described herein when present in the hair color base, or in higher or lower amounts. For example, each of the expressly described colorants, solvents, nonionic surfactants, fatty substances, rheology modifiers, cationic polymers, and/or auxiliary components may be present in approximately 1/2 the amount(s) as described for the hair color base when the hair color altering composition is prepared by mixing a buffer system or hair color base composition with an oxidizing component at a ratio of (buffer system or hair color base comprising the buffer system) :oxidizing component of about 1 :1 , may be present in 1/3 the amount(s) described for the hair color base (mixing ratio of about 1 :2), may be present in 1/4 the amount(s) described for the hair color base (mixing ratio of about 1 :3), may be present in 1/5 the amount(s) described for the hair color base (mixing ratio of about 1 :4), and so on.

[00233] The pH of the hair color altering composition may, in at least certain embodiments, be the same or substantially the same as the pH of the hair color base, for example prior to mixing the hair color base and oxidizing component. In some embodiments, the pH of the hair color altering composition may range from about 8.5 to about 10, or such as from about 8.5 to about 9.5, about 9.0 to about 9.5, or about 9.2 to about 9.5. When a colorant is present, the pH of hair color altering composition may vary within the above range according to the type of colorant included therein. If the pH is below about 8.5, the hair color altering composition may produce an insufficient amount of lift or alteration of color. If the pH is above about 10, the hair color altering composition may unnecessarily damage hair.

[00234] The hair color altering compositions can, in some embodiments, be prepared by combining a hair color base comprising a buffer system according to the disclosure with an oxidizing component. In further embodiments, the hair color altering compositions can be prepared by combining a buffer system according to the disclosure with an oxidizing component according to the disclosure. In yet further embodiments, the hair color altering compositions can be prepared by combining (i) a buffer system according to the disclosure, (ii) a composition comprising at least one component chosen from colorants, solvents, nonionic surfactants, fatty substances, rheology modifiers, cationic polymers, and auxiliary components as described herein, and (iii) an oxidizing component.

[00235] In still further embodiments, the hair color altering compositions can be prepared by combining a hair color base according to the disclosure with an oxidizing component, where the hair color base comprises at least one component chosen from colorants, solvents, nonionic surfactants, fatty substances, rheology modifiers, cationic polymers, and auxiliary components as described herein. In further embodiments, the hair color altering compositions can be prepared by combining a hair color base comprising a buffer system according to the disclosure with an oxidizing component, where the hair color base comprises at least one colorant and at least one solvent. In yet further embodiments, the hair color altering compositions can be prepared by combining (i) a buffer system according to the disclosure, (ii) a composition comprising at least one component chosen from colorants, solvents, nonionic surfactants, fatty substances, rheology modifiers, cationic polymers, and auxiliary components as described herein, and (iii) an oxidizing composition comprising at least one oxidizing agent and at least one solvent.

[00236] In yet further embodiments, the hair color altering compositions can be prepared by combining a hair color base comprising a buffer system according to the disclosure with an oxidizing composition comprising hydrogen peroxide, where the hair color base comprises at least one component chosen from colorants, solvents, nonionic surfactants, fatty substances, rheology modifiers, cationic polymers, and auxiliary components as described herein. In further embodiments, the hair color altering compositions can be prepared by combining a hair color base comprising a buffer system according to the disclosure with an oxidizing composition comprising hydrogen peroxide, where the hair color base comprises at least one colorant and at least one solvent. In yet further embodiments, the hair color altering compositions can be prepared by combining (i) a buffer system according to the disclosure, (ii) a composition comprising at least one component chosen from colorants, solvents, nonionic surfactants, fatty substances, rheology modifiers, cationic polymers, and auxiliary components as described herein, and (iii) an oxidizing composition comprising hydrogen peroxide.

[00237] In some embodiments, hair color altering compositions according to the disclosure comprise ammonium hydroxide, ammonium bicarbonate, at least one oxidizing component, at least one colorant compound, at least one solvent, optionally monoethanolamine, and optionally at least one other component suitable for use in cosmetic compositions, and in particular for hair coloring or lightening compositions.

[00238] In further embodiments, hair color altering compositions comprise, based on the total weight of the hair color altering composition, from about 0.25% to about 1 .5%, preferably from about 0.3% to about 1 .25%, about 0.5% to about 1 .2%, about 0.6% to about 1%, or about 0.5% to about 1% of ammonium hydroxide; from about 0.1% to about 0.75%, preferably from about 0.1% to about 0.5%, about 0.1% to about 0.4%, or about 0.15% to about 0.35% of ammonium bicarbonate; optionally, from about 0.005% to about 2.5%, preferably from about 0.05% to about 1 .5%, about 0.1% to about 1 .25%, about 0.25% to about 0.75%, or about 0.25% to about 0.5% of monoethanolamine; at least one oxidizing component; and optionally at least one colorant compound. In a further exemplary and non-limiting embodiment, the hair color altering composition comprises, based on the total weight of the hair color altering composition, from about 0.25% to about 1 .5%, preferably from about 0.3% to about 1 .25%, about 0.5% to about 1.2%, about 0.6% to about 1 %, or about 0.5% to about 1% of ammonium hydroxide; from about 0.1% to about 0.75%, preferably from about 0.1% to about 0.5%, about 0.1 % to about 0.4%, or about 0.15% to about 0.35% of ammonium bicarbonate; optionally, from about 0.005% to about 2.5%, preferably from about 0.05% to about 1.5%, about 0.1 % to about 1.25%, about 0.25% to about 0.75%, or about 0.25% to about 0.5% of monoethanolamine; at least one oxidizing component; and optionally at least one colorant compound, wherein the hair color altering composition has a weight ratio of ammonium bicarbonate to ammonium hydroxide ranging from about 1 :2.6 to about 1 :3, about 1 :2.7 to about 1 :3, about 1 :2.8 to about 1 :3, or about 1 :2.9 to about 1 :3, or is about 1 :2.6, about 1 :2.7, about 1 :2.8, about 1 :2.9, or about 1 :3, and/or a molar ratio of ammonium hydroxide to ammonium bicarbonate ranging from about 1 to about 1 .5, about 1 .1 to about 1 .4, about 1 .2 to about 1 .3, or about 1 .25 to about 1 .3.

[00239] In further embodiments, hair color altering compositions comprise, based on the total weight of the hair color altering composition, from about 0.5% to about 2%, preferably from about 0.6% to about 1 .75%, about 0.75% to about 1 .5%, about 0.75% to about 1 .25%, or about 1 % to about 1 .25% of ammonium hydroxide; from about 0.1% to about 1 .25%, preferably from about 0.1% to about 1 %, about 0.2% to about 0.8%, about 0.25% to about 0.75%, or about 0.25% to about 0.5% of ammonium bicarbonate; optionally, from about 0.005% to about 2.5%, preferably from about 0.05% to about 1.5%, about 0.1 % to about 1.25%, about 0.25% to about 0.75%, or about 0.25% to about 0.5% of monoethanolamine; at least one oxidizing component; and optionally at least one colorant compound. In a further exemplary and non-limiting embodiment, the hair color altering composition comprises, based on the total weight of the hair color altering composition, from about 0.5% to about 2%, preferably from about 0.6% to about 1 .75%, about 0.75% to about 1 .5%, about 0.75% to about 1 .25%, or about 1 % to about 1 .25% of ammonium hydroxide; from about 0.1 % to about 1 .25%, preferably from about 0.1 % to about 1%, about 0.2% to about 0.8%, about 0.25% to about 0.75%, or about 0.25% to about 0.5% of ammonium bicarbonate; optionally, from about 0.005% to about 2.5%, preferably from about 0.05% to about 1.5%, about 0.1% to about 1.25%, about 0.25% to about 0.75%, or about 0.25% to about 0.5% of monoethanolamine; at least one oxidizing component; and optionally at least one colorant compound, wherein the hair color altering composition has a weight ratio of ammonium bicarbonate to ammonium hydroxide ranging from about 1 :2.6 to about 1 :3, about 1 :2.7 to about 1 :3, about 1 :2.8 to about 1 :3, or about 1 :2.9 to about 1 :3, or is about 1 :2.6, about 1 :2.7, about 1 :2.8, about 1 :2.9, or about 1 :3, and/or a molar ratio of ammonium hydroxide to ammonium bicarbonate ranging from about 1 to about 1.5, about 1.1 to about 1.4, about 1 .2 to about 1 .3, or about 1 .25 to about 1 .3.

[00240] In further embodiments, hair color altering compositions comprise, based on the total weight of the hair color altering composition, from about 0.6% to about 2.5%, preferably from about 0.7% to about 2.25%, about 0.8% to about 2%, about 1% to about 1 .8%, or about 1 .2% to about 1 .7% of ammonium hydroxide; from about 0.25% to about 1.75%, preferably from about 0.25% to about 1.25%, about 0.25% to about 1 %, about 0.4% to about 0.75%, or about 0.35% to about 0.7% of ammonium bicarbonate; optionally, from about 0.005% to about 2.5%, preferably from about 0.05% to about 1.5%, about 0.1 % to about 1.25%, about 0.25% to about 0.75%, or about 0.25% to about 0.5% of monoethanolamine; at least one oxidizing component; and optionally at least one colorant compound. In a further exemplary and non-limiting embodiment, the hair color altering composition comprises, based on the total weight of the hair color altering composition, from about 0.6% to about 2.5%, preferably from about 0.7% to about 2.25%, about 0.8% to about 2%, about 1% to about 1 .8%, or about 1 .2% to about 1 .7% of ammonium hydroxide; from about 0.25% to about 1 .75%, preferably from about 0.25% to about 1 .25%, about 0.25% to about 1 %, about 0.4% to about 0.75%, or about 0.35% to about 0.7% of ammonium bicarbonate; optionally, from about 0.005% to about 2.5%, preferably from about 0.05% to about 1.5%, about 0.1% to about 1.25%, about 0.25% to about 0.75%, or about 0.25% to about 0.5% of monoethanolamine; at least one oxidizing component; and optionally at least one colorant compound, wherein the hair color altering composition has a weight ratio of ammonium bicarbonate to ammonium hydroxide ranging from about 1 :2.6 to about 1 :3, about 1 :2.7 to about 1 :3, about 1 :2.8 to about 1 :3, or about 1 :2.9 to about 1 :3, or is about 1 :2.6, about 1 :2.7, about 1 :2.8, about 1 :2.9, or about 1 :3, and/or a molar ratio of ammonium hydroxide to ammonium bicarbonate ranging from about 1 to about 1.5, about 1.1 to about 1.4, about 1 .2 to about 1 .3, or about 1 .25 to about 1 .3.

[00241] In a further exemplary and non-limiting embodiment, the hair color altering composition comprises, based on the total weight of the hair color altering composition, from about 1% to about 2.5%, preferably from about 1.25% to about 2.5%, about 1.3% to about 2.25%, about 1 .5% to about 2.3%, or about 1 .7% to about 2% of ammonium hydroxide; from about 0.25% to about 1 .75%, preferably from about 0.3% to about 1 .5%, about 0.35% to about 1 .25%, or about 0.5% to about 0.75% of ammonium bicarbonate; optionally, from about 0.005% to about 2.5%, preferably from about 0.05% to about 1.5%, about 0.1 % to about 1.25%, about 0.25% to about 0.75%, or about 0.25% to about 0.5% of monoethanolamine; at least one oxidizing component; and optionally at least one colorant compound. In a further exemplary and non-limiting embodiment, the hair color altering composition comprises, based on the total weight of the hair color altering composition, from about 1% to about 2.5%, preferably from about 1.25% to about 2.5%, about 1 .3% to about 2.25%, about 1 .5% to about 2.3%, or about 1 .7% to about 2% of ammonium hydroxide; from about 0.25% to about 1.75%, preferably from about 0.3% to about 1 .5%, about 0.35% to about 1 .25%, or about 0.5% to about 0.75% of ammonium bicarbonate; optionally, from about 0.005% to about 2.5%, preferably from about 0.05% to about 1.5%, about 0.1% to about 1.25%, about 0.25% to about 0.75%, or about 0.25% to about 0.5% of monoethanolamine; at least one oxidizing component; and optionally at least one colorant compound, wherein the hair color altering composition has a weight ratio of ammonium bicarbonate to ammonium hydroxide ranging from about 1 :2.6 to about 1 :3, about 1 :2.7 to about 1 :3, about 1 :2.8 to about 1 :3, or about 1 :2.9 to about 1 :3, or is about 1 :2.6, about 1 :2.7, about 1 :2.8, about 1 :2.9, or about 1 :3, and/or a molar ratio of ammonium hydroxide to ammonium bicarbonate ranging from about 1 to about 1.5, about 1.1 to about 1.4, about 1.2 to about 1 .3, or about 1 .25 to about 1 .3.

[00242] In a still further exemplary and non-limiting embodiment, the hair color altering composition comprises, based on the total weight of the hair color altering composition, from about 1 .5% to about 3.25%, preferably from about 1 .75% to about 3.2%, about 1 .85% to about 3%, about 2% to about 3%, about 2% to about 2.75%, or about 2.25% to about 2.75% of ammonium hydroxide; from about 0.25% to about 1 .75%, preferably from about 0.3% to about 1.5%, about 0.5% to about 1.25%, about 0.7% to about 1.25%, or about 0.75% to about 1% of ammonium bicarbonate; optionally, from about 0.005% to about 2.5%, preferably from about 0.05% to about 1 .5%, about 0.1% to about 1.25%, about 0.25% to about 0.75%, or about 0.25% to about 0.5% of monoethanolamine; at least one oxidizing component; and optionally at least one colorant compound. In a further exemplary and non-limiting embodiment, the hair color altering composition comprises, based on the total weight of the hair color altering composition, from about 1 .5% to about 3.25%, preferably from about 1 .75% to about 3.2%, about 1 .85% to about 3%, about 2% to about 3%, about 2% to about 2.75%, or about 2.25% to about 2.75% of ammonium hydroxide; from about 0.25% to about 1 .75%, preferably from about 0.3% to about 1 .5%, about 0.5% to about 1 .25%, about 0.7% to about 1 .25%, or about 0.75% to about 1% of ammonium bicarbonate; optionally, from about 0.005% to about 2.5%, preferably from about 0.05% to about 1 .5%, about 0.1 % to about 1.25%, about 0.25% to about 0.75%, or about 0.25% to about 0.5% of monoethanolamine; at least one oxidizing component; and optionally at least one colorant compound, wherein the hair color altering composition has a weight ratio of ammonium bicarbonate to ammonium hydroxide ranging from about 1 :2.6 to about 1 :3, about 1 :2.7 to about 1 :3, about 1 :2.8 to about 1 :3, or about 1 :2.9 to about 1 :3, or is about 1 :2.6, about 1 :2.7, about 1 :2.8, about 1 :2.9, or about 1 :3, and/or a molar ratio of ammonium hydroxide to ammonium bicarbonate ranging from about 1 to about 1.5, about 1 .1 to about 1 .4, about 1 .2 to about 1 .3, or about 1 .25 to about 1 .3.

[00243] In further embodiments, hair color altering compositions comprise, based on the total weight of the hair color altering composition, from about 0.1% to about 1 %, preferably from about 0.2% to about 1.25%, about 0.3% to about 1 %, about 0.4% to about 0.7%, or about 0.3% to about 0.6% of ammonium hydroxide; from about 0.05% to about 0.5%, preferably from about 0.1% to about 0.4%, about 0.1% to about 0.3%, about 0.1% to about 0.25%, or about 0.1% to about 0.2% of ammonium bicarbonate; optionally, from about 0.003% to about 1 .75%, preferably from about 0.03% to about 1%, about 0.05% to about 0.75%, about 0.1% to about 0.5%, or about 0.1% to about 0.3% of monoethanolamine; at least one oxidizing component; and optionally at least one colorant compound. In a further exemplary and non-limiting embodiment, the hair color altering composition comprises, based on the total weight of the hair color altering composition, from about 0.4% to about 1.75%, preferably from about 0.5% to about 1 .5%, about 0.6% to about 1 .4%, about 0.7% to about 1 .3%, or about 0.75% to about 1.2% of ammonium hydroxide; from about 0.1% to about 1.2%, preferably from about 0.1 % to about 1%, about 0.2% to about 0.75%, about 0.25% to about 0.75%, or about 0.25% to about 0.5% of ammonium bicarbonate; optionally, from about 0.003% to about 1 .75%, preferably from about 0.03% to about 1 %, about 0.05% to about 0.75%, about 0.1 % to about 0.5%, or about 0.1% to about 0.3% of monoethanolamine; at least one oxidizing component; and optionally at least one colorant compound, wherein the hair color altering composition has a weight ratio of ammonium bicarbonate to ammonium hydroxide ranging from about 1 :2.6 to about 1 :3, about 1 :2.7 to about 1 :3, about 1 :2.8 to about 1 :3, or about 1 :2.9 to about 1 :3, or is about 1 :2.6, about 1 :2.7, about 1 :2.8, about 1 :2.9, or about 1 :3, and/or a molar ratio of ammonium hydroxide to ammonium bicarbonate ranging from about 1 to about 1.5, about 1.1 to about 1.4, about 1.2 to about 1 .3, or about 1 .25 to about 1 .3.

[00244] In further embodiments, hair color altering compositions comprise, based on the total weight of the hair color altering composition, from about 0.3% to about 1.4%, preferably from about 0.4% to about 1.2%, about 0.5% to about 1.1%, about 0.5% to about 1 %, or about 0.5% to about 0.9% of ammonium hydroxide; from about 0.05% to about 1 %, preferably from about 0.1% to about 0.75%, about 0.1% to about 0.6%, or about 0.1% to about 0.5% of ammonium bicarbonate; optionally, from about 0.003% to about 1.75%, preferably from about 0.03% to about 1 %, about 0.05% to about 0.75%, about 0.1% to about 0.5%, or about 0.1% to about 0.3% of monoethanolamine; at least one oxidizing component; and optionally at least one colorant compound. In a further exemplary and non-limiting embodiment, the hair color altering composition comprises, based on the total weight of the hair color altering composition, from about 0.3% to about 1.4%, preferably from about 0.4% to about 1.2%, about 0.5% to about 1.1 %, about 0.5% to about 1 %, or about 0.5% to about 0.9% of ammonium hydroxide; from about 0.05% to about 1 %, preferably from about 0.1% to about 0.75%, about 0.1% to about 0.6%, or about 0.1 % to about 0.5% of ammonium bicarbonate; optionally, from about 0.003% to about 1 .75%, preferably from about 0.03% to about 1 %, about 0.05% to about 0.75%, about 0.1% to about 0.5%, or about 0.1% to about 0.3% of monoethanolamine; at least one oxidizing component; and optionally at least one colorant compound, wherein the hair color altering composition has a weight ratio of ammonium bicarbonate to ammonium hydroxide ranging from about 1 :2.6 to about 1 :3, about 1 :2.7 to about 1 :3, about 1 :2.8 to about 1 :3, or about 1 :2.9 to about 1 :3, or is about 1 :2.6, about 1 :2.7, about 1 :2.8, about 1 :2.9, or about 1 :3, and/or a molar ratio of ammonium hydroxide to ammonium bicarbonate ranging from about 1 to about 1.5, about 1 .1 to about 1 .4, about 1 .2 to about 1 .3, or about 1 .25 to about 1 .3. [00245] In further embodiments, hair color altering compositions comprise, based on the total weight of the hair color altering composition, from about 0.4% to about 1 .75%, preferably from about 0.5% to about 1 .5%, about 0.6% to about 1 .4%, about 0.7% to about 1 .3%, or about 0.75% to about 1 .2% of ammonium hydroxide; from about 0.1 % to about 1 .2%, preferably from about 0.1% to about 1%, about 0.2% to about 0.75%, about 0.25% to about 0.75%, or about 0.25% to about 0.5% of ammonium bicarbonate; optionally, from about 0.003% to about 1 .75%, preferably from about 0.03% to about 1%, about 0.05% to about 0.75%, about 0.1% to about 0.5%, or about 0.1% to about 0.3% of monoethanolamine; at least one oxidizing component; and optionally at least one colorant compound. In a further exemplary and non-limiting embodiment, the hair color altering composition comprises, based on the total weight of the hair color altering composition, from about 0.4% to about 1.75%, preferably from about 0.5% to about 1 .5%, about 0.6% to about 1 .4%, about 0.7% to about 1 .3%, or about 0.75% to about 1.2% of ammonium hydroxide; from about 0.1% to about 1.2%, preferably from about 0.1 % to about 1%, about 0.2% to about 0.75%, about 0.25% to about 0.75%, or about 0.25% to about 0.5% of ammonium bicarbonate; optionally, from about 0.003% to about 1 .75%, preferably from about 0.03% to about 1 %, about 0.05% to about 0.75%, about 0.1 % to about 0.5%, or about 0.1% to about 0.3% of monoethanolamine; at least one oxidizing component; and optionally at least one colorant compound, wherein the hair color altering composition has a weight ratio of ammonium bicarbonate to ammonium hydroxide ranging from about 1 :2.6 to about 1 :3, about 1 :2.7 to about 1 :3, about 1 :2.8 to about 1 :3, or about 1 :2.9 to about 1 :3, or is about 1 :2.6, about 1 :2.7, about 1 :2.8, about 1 :2.9, or about 1 :3, and/or a molar ratio of ammonium hydroxide to ammonium bicarbonate ranging from about 1 to about 1.5, about 1.1 to about 1.4, about 1.2 to about 1 .3, or about 1 .25 to about 1 .3.

[00246] In a further exemplary and non-limiting embodiment, the hair color altering composition comprises, based on the total weight of the hair color altering composition, from about 0.5% to about 1.75%, preferably from about 0.6% to about 1.6%, about 0.9% to about 1.5%, about 1% to about 1.4%, or about 1.1% to about 1.3% of ammonium hydroxide; from about 0.1% to about 1.2%, preferably from about 0.25% to about 1%, about 0.25% to about 0.75%, or about 0.3% to about 0.5% of ammonium bicarbonate; optionally, from about 0.003% to about 1.75%, preferably from about 0.03% to about 1%, about 0.05% to about 0.75%, about 0.1% to about 0.5%, or about 0.1 % to about 0.3% of monoethanolamine; at least one oxidizing component; and optionally at least one colorant compound. In a further exemplary and non-limiting embodiment, the hair color altering composition comprises, based on the total weight of the hair color altering composition, from about 0.5% to about 1.75%, preferably from about 0.6% to about 1.6%, about 0.9% to about 1.5%, about 1% to about 1.4%, or about 1.1 % to about 1.3% of ammonium hydroxide; from about 0.1% to about 1.2%, preferably from about 0.25% to about 1%, about 0.25% to about 0.75%, or about 0.3% to about 0.5% of ammonium bicarbonate; optionally, from about 0.003% to about 1 .75%, preferably from about 0.03% to about 1%, about 0.05% to about 0.75%, about 0.1% to about 0.5%, or about 0.1% to about 0.3% of monoethanolamine; at least one oxidizing component; and optionally at least one colorant compound, wherein the hair color altering composition has a weight ratio of ammonium bicarbonate to ammonium hydroxide ranging from about 1 :2.6 to about 1 :3, about 1 :2.7 to about 1 :3, about 1 :2.8 to about 1 :3, or about 1 :2.9 to about 1 :3, or is about 1 :2.6, about 1 :2.7, about 1 :2.8, about 1 :2.9, or about 1 :3, and/or a molar ratio of ammonium hydroxide to ammonium bicarbonate ranging from about 1 to about 1.5, about 1.1 to about 1.4, about 1.2 to about 1 .3, or about 1 .25 to about 1 .3.

[00247] In a still further exemplary and non-limiting embodiment, the hair color altering composition comprises, based on the total weight of the hair color altering composition, from about 1% to about 2.25% of ammonium hydroxide, preferably from about 1 .25% to about 2.1%, about 1.4% to about 2%, about 1.5% to about 1.9%, or about 1.5% to about 1.8% of ammonium hydroxide; from about 0.1 % to about 1.2%, preferably from about 0.25% to about 1 %, about 0.3% to about 1%, about 0.4% to about 0.8%, or about 0.4% to about 0.7% of ammonium bicarbonate; optionally, from about 0.003% to about 1 .75%, preferably from about 0.03% to about 1 %, about 0.05% to about 0.75%, about 0.1 % to about 0.5%, or about 0.1% to about 0.3% of monoethanolamine; at least one oxidizing component; and optionally at least one colorant compound. In a further exemplary and non-limiting embodiment, the hair color altering composition comprises, based on the total weight of the hair color altering composition, from about 3% to about 6.5%, preferably from about 3.5% to about 6.25%, about 3.75% to about 6%, about 4% to about 6%, about 4% to about 5.75%, or about 4.5% to about 5.5% of ammonium hydroxide; from about 0.5% to about 3.5%, preferably from about 0.75% to about 3%, about 1% to about 2.5%, about 1.25% to about 2.25%, or about 1.5% to about 2% of ammonium bicarbonate; optionally, from about 0.003% to about 1 .75%, preferably from about 0.03% to about 1 %, about 0.05% to about 0.75%, about 0.1% to about 0.5%, or about 0.1% to about 0.3% of monoethanolamine; at least one oxidizing component; and optionally at least one colorant compound, wherein the hair color altering composition has a weight ratio of ammonium bicarbonate to ammonium hydroxide ranging from about 1 :2.6 to about 1 :3, about 1 :2.7 to about 1 :3, about 1 :2.8 to about 1 :3, or about 1 :2.9 to about 1 :3, or is about 1 :2.6, about 1 :2.7, about 1 :2.8, about 1 :2.9, or about 1 :3, and/or a molar ratio of ammonium hydroxide to ammonium bicarbonate ranging from about 1 to about 1.5, about 1.1 to about 1.4, about 1.2 to about 1.3, or about 1.25 to about 1 .3.

[00248] For example, the hair color altering composition may include at least one oxidizing component, about 1 .25% to about 1 .5% ammonium hydroxide, about 0.3% to about 0.75% ammonium bicarbonate, and optionally from about 0.1 % to about 0.5% monoethanolamine, all weights based on the total weight of the hair color altering composition. Preferably, the hair color altering composition has a weight ratio of ammonium bicarbonate to ammonium hydroxide ranging from about 1 :2.5 to about 1 :3, such as about 1 :2.7 to about 1 :2.9, and/or a molar ratio of ammonium hydroxide to ammonium bicarbonate ranging from about 1 to about 1 .5, such as about 1 .25 to about 1.3.

[00249] In a further example, the hair color altering composition may include at least one oxidizing component, about 1 .6% to about 1.9% ammonium hydroxide, about 0.5% to about 0.75% ammonium bicarbonate, and optionally from about 0.1 % to about 0.5% monoethanolamine, all weights based on the total weight of the hair color altering composition. Preferably, the hair color altering composition has a weight ratio of ammonium bicarbonate to ammonium hydroxide ranging from about 1 :2.5 to about 1 :3, such as about 1 :2.7 to about 1 :2.9, and/or a molar ratio of ammonium hydroxide to ammonium bicarbonate ranging from about 1 to about 1 .5, such as about 1 .25 to about 1.3.

[00250] In a still further example, the hair color altering composition may include at least one oxidizing component, about 2.3% to about 2.8% ammonium hydroxide, about 0.75% to about 1% ammonium bicarbonate, and optionally from about 0.1 % to about 0.5% monoethanolamine, all weights based on the total weight of the hair color altering composition. Preferably, the hair color altering composition has a weight ratio of ammonium bicarbonate to ammonium hydroxide ranging from about 1 :2.5 to about 1 :3, such as about 1 :2.7 to about 1 :2.9, and/or a molar ratio of ammonium hydroxide to ammonium bicarbonate ranging from about 1 to about 1 .5, such as about 1 .25 to about

1.3.

[00251] As a further example, the hair color altering composition may include at least one oxidizing component, about 0.85% to about 1 % ammonium hydroxide, about 0.25% to about 0.5% ammonium bicarbonate, and optionally from about 0.1 % to about 0.5% monoethanolamine, all weights based on the total weight of the hair color altering composition. Preferably, the hair color altering composition has a weight ratio of ammonium bicarbonate to ammonium hydroxide ranging from about 1 :2.5 to about 1 :3, such as about 1 :2.7 to about 1 :2.9, and/or a molar ratio of ammonium hydroxide to ammonium bicarbonate ranging from about 1 to about 1 .5, such as about 1 .25 to about

1.3.

[00252] In a still further example, the hair color altering composition may include at least one oxidizing component, about 1% to about 1.3% ammonium hydroxide, about 0.3% to about 0.5% ammonium bicarbonate, and optionally from about 0.1% to about 0.5% monoethanolamine, all weights based on the total weight of the hair color altering composition. Preferably, the hair color altering composition has a weight ratio of ammonium bicarbonate to ammonium hydroxide ranging from about 1 :2.5 to about 1 :3, such as about 1 :2.7 to about 1 :2.9, and/or a molar ratio of ammonium hydroxide to ammonium bicarbonate ranging from about 1 to about 1 .5, such as about 1 .25 to about

1.3.

[00253] In a further example, the hair color altering composition may include at least one oxidizing component, about 1 .5% to about 1 .75% ammonium hydroxide, about 0.5% to about 0.75% ammonium bicarbonate, and optionally from about 0.1% to about 0.5% monoethanolamine, all weights based on the total weight of the hair color altering composition. Preferably, the hair color altering composition has a weight ratio of ammonium bicarbonate to ammonium hydroxide ranging from about 1 :2.5 to about 1 :3, such as about 1 :2.7 to about 1 :2.9, and/or a molar ratio of ammonium hydroxide to ammonium bicarbonate ranging from about 1 to about 1 .5, such as about 1 .25 to about

1.3.

[00254] As a further example, the hair color altering composition may include at least one oxidizing component, at least one colorant compound, about 1 .25% to about 1 .5% ammonium hydroxide, about 0.3% to about 0.75% ammonium bicarbonate, and optionally from about 0.1% to about 0.5% monoethanolamine, all weights based on the total weight of the hair color altering composition. Preferably, the hair color altering composition has a weight ratio of ammonium bicarbonate to ammonium hydroxide ranging from about 1 :2.5 to about 1 :3, such as about 1 :2.7 to about 1 :2.9, and/or a molar ratio of ammonium hydroxide to ammonium bicarbonate ranging from about 1 to about 1 .5, such as about 1 .25 to about 1 .3.

[00255] In a further example, the hair color altering composition may include at least one oxidizing component, at least one colorant compound, about 1.6% to about 1.9% ammonium hydroxide, about 0.5% to about 0.75% ammonium bicarbonate, and optionally from about 0.1% to about 0.5% monoethanolamine, all weights based on the total weight of the hair color altering composition. Preferably, the hair color altering composition has a weight ratio of ammonium bicarbonate to ammonium hydroxide ranging from about 1 :2.5 to about 1 :3, such as about 1 :2.7 to about 1 :2.9, and/or a molar ratio of ammonium hydroxide to ammonium bicarbonate ranging from about 1 to about 1 .5, such as about 1 .25 to about 1 .3.

[00256] In a still further example, the hair color altering composition may include at least one oxidizing component, at least one colorant compound, about 2.3% to about 2.8% ammonium hydroxide, about 0.75% to about 1 % ammonium bicarbonate, and optionally from about 0.1% to about 0.5% monoethanolamine, all weights based on the total weight of the hair color altering composition. Preferably, the hair color altering composition has a weight ratio of ammonium bicarbonate to ammonium hydroxide ranging from about 1 :2.5 to about 1 :3, such as about 1 :2.7 to about 1 :2.9, and/or a molar ratio of ammonium hydroxide to ammonium bicarbonate ranging from about 1 to about 1 .5, such as about 1 .25 to about 1 .3.

[00257] As a further example, the hair color altering composition may include at least one oxidizing component, at least one colorant compound, about 0.85% to about 1% ammonium hydroxide, about 0.25% to about 0.5% ammonium bicarbonate, and optionally from about 0.1% to about 0.5% monoethanolamine, all weights based on the total weight of the hair color altering composition. Preferably, the hair color altering composition has a weight ratio of ammonium bicarbonate to ammonium hydroxide ranging from about 1 :2.5 to about 1 :3, such as about 1 :2.7 to about 1 :2.9, and/or a molar ratio of ammonium hydroxide to ammonium bicarbonate ranging from about 1 to about 1 .5, such as about 1 .25 to about 1 .3.

[00258] In a still further example, the hair color altering composition may include at least one oxidizing component, at least one colorant compound, about 1% to about 1 .3% ammonium hydroxide, about 0.3% to about 0.5% ammonium bicarbonate, and optionally from about 0.1% to about 0.5% monoethanolamine, all weights based on the total weight of the hair color altering composition. Preferably, the hair color altering composition has a weight ratio of ammonium bicarbonate to ammonium hydroxide ranging from about 1 :2.5 to about 1 :3, such as about 1 :2.7 to about 1 :2.9, and/or a molar ratio of ammonium hydroxide to ammonium bicarbonate ranging from about 1 to about 1 .5, such as about 1 .25 to about 1 .3.

[00259] In a further example, the hair color altering composition may include at least one oxidizing component, at least one colorant compound, about 1 .5% to about 1 .75% ammonium hydroxide, about 0.5% to about 0.75% ammonium bicarbonate, and optionally from about 0.1% to about 0.5% monoethanolamine, all weights based on the total weight of the hair color altering composition. Preferably, the hair color altering composition has a weight ratio of ammonium bicarbonate to ammonium hydroxide ranging from about 1 :2.5 to about 1 :3, such as about 1 :2.7 to about 1 :2.9, and/or a molar ratio of ammonium hydroxide to ammonium bicarbonate ranging from about 1 to about 1 .5, such as about 1 .25 to about 1 .3.

Methods for Altering the Color of Hair

[00260] As described above, a buffer system or hair color base may be mixed with an oxidizing component, e.g. at the time of or immediately before it is to be applied to the hair, such as up to about 30 minutes before, up to about 20 minutes before, or up to about 10 minutes before, for example about 1 to about 20 minutes before. The term “mixed” and all variations of this term as used herein refers to contacting or combining or reconstituting or dissolving or dispersing or blending or shaking the hair color base with the oxidizing component. It can also mean introducing the hair color base to the oxidizing component or vice versa. It may also mean placing the hair color base in the same vessel or container as the oxidizing component. A colorant compound may optionally be present in the buffer system, hair color base, and/or oxidizing component.

[00261] In some embodiments, a hair color base according to the disclosure can be mixed or combined with an oxidizing component in a ratio by weight of from about 1 :1 to about 1 :10, such as from about 1 :1 to about 1 :4, such as from about 1 :1 to about 1 :3, or from about 1 :1 to about 1 :2, such as, for example about 1 :1 , about 1 :2, about 1 :3, or about 1 :4.

[00262] Thus, methods or processes for lifting or altering the color of keratin fibers, in particular human hair, in accordance with the disclosure comprise contacting a hair color altering composition comprising the buffer system or hair color base according to the disclosure, an oxidizing component, and optionally a colorant, with the keratin fibers such as hair.

[00263] In at least certain embodiments, the hair color base and/or hair color altering composition may exhibit low odor, and/or may not have an unpleasant sensation on the scalp, and thus be more pleasant for the consumer. Additionally, the hair color base and/or hair color altering composition may be easy to apply, for example with a standard bowl and brush or bottle.

[00264] Upon application of the hair color altering composition, and after an optional resting time (leave-on or “processing” time) on the hair, for example, ranging from about 1 to about 60 minutes, such as from about 5 to about 45 minutes, from about 5 to about 20 minutes, from about 10 to about 20 minutes, or about 20 minutes, the hair is rinsed. In various embodiments, the hair color altering composition is not left on the hair more than 25 minutes, for example not more than 20 minutes, not more than 15 minutes, or not more than 10 minutes. The hair may further be optionally washed with shampoo, rinsed again, optionally washed with a hair conditioning composition, and/or rinsed again, then dried. The shampoo and hair conditioning composition can be any conventional hair shampoo and conditioner products.

[00265] The temperature that the process of lifting or altering the color of hair is carried out at is generally between room temperature and 80 ^Q C, for example between room temperature and 60 ^Q C.

[00266] It has been surprisingly discovered that the application of the hair color base and/or hair color composition onto keratin fibers such as hair results in satisfactory lifting or lightening of the color of the keratin fibers, while minimizing damage to the fibers compared to commercial or conventional hair color compositions which are typically left on the hair from 30 to 45 minutes or more. The coloring obtained using the compositions and process of the present disclosure may also be durable or wash/fade resistant.

[00267] The lifting of the color of the hair is evaluated by the tone height or level which describes the degree or level of lift or lightening. The tone heights range from 1 (black) to 10 (light blond), one unit corresponding to one tone; the higher the number, the lighter the shade or the greater the degree of lift.

[00268] It was surprisingly and unexpectedly discovered that by using the compositions and processes of the present disclosure on hair, the color of the hair was sufficiently lightened such that the degree of lift (increase in tone height) ranged from 0.5 to 4.5, such as up to 2, from 1 to 4, from 1 .5 to 2.5, from 2 to 2.5, or about 2. For example, when the starting tone height before treating the hair is 5, and the tone height after treating the hair is 7.5, then the degree of lift or increase in tone height is 2.5. At the same time, the hair treated with the buffer systems or hair color bases and compositions did not feel as rough and did not visually appear to be as damaged as hair treated with conventional dyeing or lifting compositions, indicating less damage to the hair fiber compared to conventional hair coloring compositions, e.g. not comprising the hair color base or buffer systems according to the disclosure.

[00269] According to various embodiments, the process and compositions may be used on hair that has not been previously artificially dyed or pigmented. In further embodiments, the process and composition disclosed herein may be also used on hair that has been previously artificially dyed or pigmented.

Kits

[00270] A further embodiment of the disclosure includes hair dye kits or multicompartment devices comprising one or more separate compartments or containers, wherein each compartment or container separately contains a buffer system, a hair color base, an oxidizing component, and optionally at least one additional composition.

[00271] For example, in one embodiment, a kit comprises (i) a first compartment containing a hair color base comprising a buffer system according to the disclosure, and optionally a colorant compound, and (ii) a second compartment containing one or more oxidizing components.

[00272] In a further embodiment, a kit comprises (i) a first compartment containing a buffer system according to the disclosure, and (ii) a second compartment containing one or more oxidizing components.

[00273] In yet another embodiment, a kit comprises (i) a first compartment containing a hair color base comprising a buffer system according to the disclosure, (ii) a second compartment containing one or more oxidizing components, and (iii) a third compartment containing a composition comprising at least one component chosen from surfactants, fatty compounds, colorant compounds, solvents, or mixtures thereof.

[00274] Other than in the operating examples, or where otherwise indicated, all numbers expressing quantities of components and/or reaction conditions are to be understood as being modified in all instances by the term "about" which encompasses + 10%, ± 9%, ± 8%, ± 7%, + 6%, ± 5%, ± 4%, + 3%, ± 2%, or + 1%. All numbers expressing quantities of components are given by weight, relative to the total weight of the composition in which the component is present, unless otherwise indicated.

[00275] "At least one" as used herein means one or more and thus includes individual components as well as mixtures/combinations.

[00276] "Keratin fibers" include, but are not limited to, human hair. In one specific embodiment, the terms “keratin fibers,” “hair,” and the like exclude eyelashes.

[00277] The term “substantially anhydrous” as used herein means that the referenced composition is free or substantially free of water, for example, no more than 5% by weight, or no more than 2% by weight, or no more than 1% by weight, based on the weight of the oxidizing composition. It should be noted that this refers for example to bound water, such as the water of crystallization of the salts or traces of water absorbed by the raw materials used in the preparation of the compositions according to the disclosure. In some embodiments, the phrases “anhydrous or substantially anhydrous,” or “free or substantially free of water,” mean that the composition has no added water, but small or very small amounts of water may be present as a residual constituent of the various component(s) added to the compositions.

[00278] All numbers expressing pH values are to be understood as being modified by the term “about,” and as encompassing readings using a pH meter having a variation of up to + 10%, such as up to + 9%, up to + 8%, up to + 7%, up to + 6%, up to + 5%, up to + 4%, up to + 3%, up to + 2%, or up to + 1%, which a skilled person will recognize relates to the inherent variation in pH meters.

[00279] The term “altering the color” or “color-altering” as used herein may refer lifting or lightening the color of hair. It can also refer to dyeing or coloring hair or depositing color onto the hair. In certain instances, it refers to lifting or lightening the color of hair and depositing color onto the hair at the same time.

[00280] “Formed from,” as used herein, means obtained from chemical reaction of, wherein “chemical reaction,” includes spontaneous chemical reactions and induced chemical reactions. As used herein, the phrase “formed from”, is open ended and does not limit the components of the composition to those listed, e.g., as component (i) and component (ii). Furthermore, the phrase “formed from” does not limit the order of adding components to the composition or require that the listed components (e.g., components (i) and (ii)) be added to the composition before any other components. [00281] “Hydrocarbons,” as used herein, include alkanes, alkenes, and alkynes, wherein the alkanes comprise at least one carbon, and the alkenes and alkynes each comprise at least two carbons; further wherein the hydrocarbons may be chosen from linear hydrocarbons, branched hydrocarbons, and cyclic hydrocarbons; further wherein the hydrocarbons may optionally be substituted; and further wherein the hydrocarbons may optionally further comprise at least one heteroatom intercalated in the hydrocarbon chain.

[00282] “Silicone compound,” as used herein, includes, for example, silica, silanes, silazanes, siloxanes, and organosiloxanes; and refers to a compound comprising at least one silicon; wherein the silicone compound may be chosen from linear silicone compounds, branched silicone compounds, and cyclic silicone compounds; further wherein the silicone compound may optionally be substituted; and further wherein the silicone compound may optionally further comprise at least one heteroatom intercalated in the silicone chain, wherein the at least one heteroatom is different from the at least one silicon.

[00283] “Substituted," as used herein, means comprising at least one substituent. Non-limiting examples of substituents include atoms, such as oxygen atoms and nitrogen atoms, as well as functional groups, such as hydroxyl groups, ether groups, alkoxy groups, acyloxyalkyl groups, oxyalkylene groups, polyoxyalkylene groups, carboxylic acid groups, amine groups, acylamino groups, amide groups, halogen containing groups, ester groups, thiol groups, sulphonate groups, thiosulphate groups, siloxane groups, and polysiloxane groups. The substituent(s) may be further substituted. [00284] "Polymers," as defined herein, include homopolymers and copolymers formed from at least two different types of monomers.

[00285] Notwithstanding that the numerical ranges and parameters setting forth the broad scope of the disclosure are approximations, unless otherwise indicated the numerical values set forth in the specific examples are reported as precisely as possible. Any numerical value, however, inherently contains certain errors necessarily resulting from the standard deviation found in their respective testing measurements. The examples that follow serve to illustrate embodiments of the present disclosure without, however, being limiting in nature.

EXAMPLES [00286] Implementation of the present disclosure is demonstrated by way of the following non-limiting examples.

[00287] In the Examples, ammonium hydroxide was added as an aqueous composition having 41 .2% active material, by weight; ammonium thiolactate was added as a composition having 58% active material, by weight; laureth-5 carboxylic acid was added as a composition having 90% active material, by weight; alcohol (denatured) was added as a composition having 93.2% active material, by weight; deceth-3 was added as an aqueous composition having 90% active material, by weight; and PEG-4 rapeseedamide was added as an aqueous composition having 92.4% active material.

[00288] In the Examples below, all amounts are given by weight of active material, relative to the total weight of the composition in which they are present.

Example 1 - Inventive Hair Color Base Compositions

[00289] The inventive hair color base compositions in Table 1 were prepared. Each of compositions 1 A-1 F was liquid, and had a pH greater than 10.

TABLE 1

1 : Colorants include p-phenylenediamine, hydroxybenzomorpholine, N-N-bis(2-hydroxyethyl)-p- phenylenediamine sulfate, 2-methyl-resorcinol, 2,4-diaminophenoxyethanol HCI, and m- aminophenol

2: Colorants include p-phenylenediamine, 6-hydroxyindole, hydroxybenzomorpholine, m- aminophenol, and 2,4-diaminophenoxyethanol HCI

Example 2 - Comparative Hair Color Base Compositions

[00290] The comparative hair color base compositions in Table 2 were prepared. Each of compositions C1 -C3 was liquid, and had a pH greater than 10. Comparative Examples C1 and C2 do not include ammonium bicarbonate in the buffer, and all three comparative compositions have a higher amount of monoethanolamine.

TABLE 2

Example 3 - Inventive and Comparative Hair Color Altering Compositions

[00291] Inventive hair color altering compositions 1 B’-1 F’ were prepared by mixing equal amounts of each of hair color base compositions 1 B-1 F with an aqueous 20V hydrogen peroxide oxidizing composition. Comparative hair color altering compositions C1 ’-C3’ were prepared by mixing equal amounts of each of hair color base compositions C1 -C3 with an aqueous 20V hydrogen peroxide oxidizing composition.

TABLE 3 - Hair Color Altering Compositions

[00292] The pH of each of hair color altering compositions 1 B’-1 F’ and C1 ’-C3’ was above 7.

Example 4 - Comparative Testing

[00293] Testing was carried out to assess the lift and processing effects imparted to hair treated with inventive and comparative hair color altering compositions. [00294] Three grams of each of hair color altering compositions 1 B’-1 F’, C2’, and C3’ was applied to separate 1 gram locks of hair (undamaged, not previously color-treated, 90% gray). The compositions were left on the locks for a processing time of 30 minutes on a hot plate set at a temperature of 27°C, after which the locks were rinsed, shampooed, rinsed again, and dried.

Example 4-1 - Lift and Processing Time: Inventive and Comparative Compositions

[00295] The lift achieved with a representative inventive composition based on 113’ 1 C’, and 1 D’ (composition 1X’) and comparative composition C2’ was measured over time, to evaluate the impact of buffer systems according to the disclosure. The change in L value (AL) was determined using a Minolta CM2600d spectrocolorimeter (specular components included, 10 degrees angle, illuminant D65) in the CIE L*a*b* system, where AL at any point in time is calculated by subtracting the L value at that point in time from the initial L value. According to the CIE L*a*b* system, the greater the value of L, the lighter the color. Conversely, the lower the value of L, the darker the color. The results are set forth in Table 4-1 .

TABLE 4-1

[00296] As can be seen in Table 4-1 , inventive hair color altering composition 1X’ was significantly more effective in lightening the color of the hair over time. In particular, composition 1X’ achieved considerable lightening after only 5 minutes, compared to composition C2’, which trend continued at all time points up to 30 minutes. As Table 4- 1 shows, composition 1X’ achieved a greater lightening effect after 10 minutes than composition C2’ achieved after 30 minutes. The results of this comparison are shown graphically in Figure 1 .

[00297] This Example demonstrates that hair color altering compositions comprising buffer systems or hair color bases comprising buffer systems according to the disclosure provide improved lift over a shorter processing times than hair color altering compositions not comprising buffer systems or hair color bases according to the disclosure.

Example 4-2 - Lift and Processing Time: Different Levels of Buffering Components

[00298] The lift achieved with each of inventive compositions 1X’, 1 E’, and 1 F’ was measured over time, where each composition has different levels of ammonium bicarbonate and ammonium hydroxide. The change in L value (AL) was determined as above. The results are set forth in Table 4-2.

TABLE 4-2

[00299] As seen in Table 4-2, although significant increase in lift over time is imparted by hair color altering composition 1X’ compared to hair color altering composition 1 F’, only slight differences were seen in lift over time imparted by hair color altering composition 1 E’ compared to 1X’. The results of this comparison are shown graphically in Figure 2.

[00300] Notably, each of inventive hair color altering compositions 1X’, 1 E’, and 1 F’ achieved a level of lift at 10 minutes (1 X’ and 1 E’) or 15 minutes (1 F’) comparable to that achieved by comparative hair color altering composition C2’ (Table 4-1 ) at 30 minutes.

[00301] This Example further confirms that hair color altering compositions comprising buffer systems or hair color bases comprising buffer systems according to the disclosure provide improved lift over a shorter processing times than hair color altering compositions not comprising buffer systems or hair color bases according to the disclosure, and also demonstrates that buffering capacity imparted to hair color altering compositions according to the disclosure to some extent plateaus in certain combinations of ranges of ammonium bicarbonate and ammonium hydroxide, with increasing amounts not leading to significant increase in lift over time.

Example 4-3 - Evaluation of Monoethanolamine on Processing

[00302] The lift achieved with each of inventive hair color altering composition 1X’ and comparative hair color altering composition C3’ was measured over time, to evaluate the impact of the amount of monoethanolamine on the lift and processing. The change in L value (AL) was determined as above. The results are set forth in Table 4-3.

TABLE 4-3 [00303] As seen in Table 4-3 and Figure 3, the reaction of composition 1X’ plateaus over time, leading to controlled reaction time and color deposit, whereas the reaction of composition C3’ accelerates too quickly, resulting in less controlled reaction and deposit. This reaction acceleration leads to over processing of the hair over the time studied.

[00304] This Example demonstrates that the buffering effect in the hair color altering compositions of buffer systems containing monoethanolamine decreases at higher amounts of monoethanolamine, such as in composition C3’.

Example 5 - Inventive Hair Color Base Compositions

[00305] The inventive hair color base compositions in Table 5-1 were prepared.

TABLE 5-1

1 : Colorants include p-phenylenediamine, hydroxybenzomorpholine, N-N-bis(2-hydroxyethyl)-p- phenylenediamine sulfate, m-aminophenol, 2-methyl-resorcinol, and 2,4- diaminophenoxyethanol HCI

2: Colorants include p-phenylenediamine, p-aminophenol, 6-hydroxyindole, hydroxybenzomorpholine, N-N-bis(2-hydroxyethyl)-p-phenylenediamine sulfate, m-aminophenol, 2-methyl-resorcinol, and 2,4-diaminophenoxyethanol HCI

3: Colorants include p-phenylenediamine, p-aminophenol, 6-hydroxyindole, hydroxybenzomorpholine, N-N-bis(2-hydroxyethyl)-p-phenylenediamine sulfate, 2-methyl- resorcinol, and 2,4-diaminophenoxyethanol HCI

4: Colorants include p-aminophenol, 2-amino-3-hydroxypyridine, 6-hydroxyindole, hydroxybenzomorpholine, m-aminophenol, 2-methyl-resorcinol, 2,4-diaminophenoxyethanol HCI, and toluene-2,5-diamine

[00306] The inventive hair color base compositions in Table 5-2 were prepared.

TABLE 5-2

1 : Colorants include toluene-2,5-diamine, p-aminophenol, m-aminophenol, hydroxybenzomorpholine, 2,4-diaminophenoxyethanol HCI, 2-amino-3-hydroxypyridine, and 6-hydroxyindole 2: Colorants include toluene-2,5-diamine, p-aminophenol, m-aminophenol, hydroxybenzomorpholine, 2-amino-3-hydroxypyridine, and 6-hydroxyindole

3: Colorants include toluene-2,5-diamine, m-aminophenol, hydroxybenzomorpholine, 2,4- diaminophenoxyethanol HCI, and 6-hydroxyindole

4: Colorants include toluene-2,5-diamine, p-aminophenol, N-N-bis(2-hydroxyethyl)-p-phenylene- diamine sulfate, m-aminophenol, hydroxybenzomorpholine, 2,4-diaminophenoxyethanol HCI, and 6-hydroxyindole

5: Colorants include toluene-2,5-diamine, p-aminophenol, m-aminophenol, hydroxybenzomorpholine, 2-amino-3-hydroxypyridine, 4-amino-2-hydroxytoluene, and 6-hydroxyindole 6: Colorants include toluene-2,5-diamine, p-aminophenol, m-aminophenol, hydroxybenzomorpholine, 2,4-diaminophenoxyethanol HCI, 2-methyl-5-hydroxyethylaminophenol, 4-amino-2- hydroxytoluene, and 6-hydroxyindole

[00307] Hair color base compositions 5A-5L were combined with an aqueous 20V hydrogen peroxide oxidizing composition at a mix ratio of 1 :1 , to provide hair color altering compositions 5A’-5L’ according to the disclosure.

[00308] Hair color altering compositions 5A’-5L’ were each applied to two sections of heads of hair (different heads of hair for each composition) having different tone levels and different amounts of gray. The first section was allowed to process under ambient conditions for 10 minutes and the second section was allowed to process under ambient conditions for 15 minutes. A third section of each of the heads of hair was treated with composition C1 ’ and allowed to process under ambient conditions for 30 minutes. Once processing time ended, the hair was rinsed, shampooed, rinsed again, and dried.

[00309] Visual inspection of the hair after it was dried showed that hair color altering compositions 5A’-5L’ provided comparable or improved hair coloration effects after both 10 and 15 minutes compared to that provided by composition C1 ’ after 30 minutes.

Example 6 - Comparative Testing

[00310] Testing was carried out to assess the lift imparted to hair treated with inventive and comparative hair color altering compositions, as well as control of the reactions with hair color altering compositions according to the disclosure. [00311] Inventive hair color altering composition 5X’ was prepared by mixing equal amounts of a hair color base composition representative of inventive hair color base compositions 5A, 5B, 5C, and 5E with an aqueous 20V hydrogen peroxide oxidizing composition, and inventive hair color altering composition 5Y’ was prepared by mixing equal amounts of a hair color base composition representative of inventive hair color base compositions 5D and 5F-5L with an aqueous 20V hydrogen peroxide oxidizing composition.

[00312] Equal amounts of hair color altering compositions 5X’, 5Y’, and C1 ’ were applied to three different groups of locks of hair. The first group of locks was natural level 3, the second was natural level 6, and the third was natural level 9. The compositions were left on the locks for a processing time of 30 minutes, after which the locks were rinsed, shampooed, rinsed again, and dried.

[00313] As can be seen in Figures 4 (natural level 3), 5 (natural level 6), and 6 (natural level 9), hair color altering compositions 5X’ and 5Y’ according to the disclosure provide improved lift over a shorter processing times than hair color altering composition C1 ’ not according to the disclosure. Thus, inventive hair color altering compositions 5X’ and 5Y’ provide good change in tone in less time, while at the same time reducing the likelihood of over processing and damage to the hair or scalp.

[00314] The above Examples 1 -6 demonstrate that hair color altering compositions comprising a buffer system according to the disclosure, or comprising a hair color base comprising a buffer system according to the disclosure, result in faster processing time and more controlled reaction, with comparable or improved alteration of hair color. Faster processing time and more controlled reaction contribute to less damage and more controlled color deposition/lightening, thereby reducing the risk of over processing and damaging the hair.

[00315] It will be apparent to those skilled in the art that various modifications and variations can be made in the delivery system, composition and methods of the invention without departing from the spirit or scope of the invention.