SIRICHANDRA CAROLINE (FR)
| WO2020065849A1 | 2020-04-02 |
| US8501210B2 | 2013-08-06 | |||
| KR20160055990A | 2016-05-19 | |||
| JP2015157794A | 2015-09-03 | |||
| KR20200081036A | 2020-07-07 | |||
| JP2016060716A | 2016-04-25 | |||
| KR101580809B1 | 2015-12-29 | |||
| KR101580809B1 | 2015-12-29 |
DATABASE GNPD [online] MINTEL; 31 May 2011 (2011-05-31), ANONYMOUS: "Eyes Rescue Total Perfection Eye Contour Serum", XP055830521, retrieved from https://www.gnpd.com/sinatra/recordpage/1549027/ Database accession no. 1549027
DATABASE GNPD [online] MINTEL; 4 December 2006 (2006-12-04), ANONYMOUS: "Outdoor Meetings, Wintertime Face Cream", XP055830520, retrieved from https://www.gnpd.com/sinatra/recordpage/621455/ Database accession no. 621455
COSMETIC TECHNOLOGY, vol. 14, no. 5, 2011, pages 17 - 21
| CLAIMS [Claim 1] A cosmetic composition comprising: (i) at least one Tamarindus indica seed polysaccharide; (ii) at least one amino acid or one amino acid derivative; and (iii) water. [Claim 2] The composition as claimed in claim 1, characterized in that the Tamarindus indica seed polysaccharide(s) are present in an amount ranging from 0.05% to 10% by weight, preferably from 0.1% to 5% by weight, more preferentially from 0.5% to 3% by weight, more preferentially still from 1% to 2.5% by weight, with respect to the total weight of the composition. [Claim 3] The composition as claimed in either one of the preceding claims, characterized in that the amino acid(s) are chosen from trimethylglycine (betaine), proline and their mixtures, more preferentially trimethylglycine (betaine). [Claim 4] The composition as claimed in any one of the preceding claims, characterized in that the amino acid(s) or amino acid derivative(s) are present in a content ranging from 0.1% to 30% by weight, preferably from 1% to 25% by weight, more preferentially from 5% to 20% by weight, with respect to the total weight of the composition. [Claim 5] The composition as claimed in any one of the preceding claims, characterized in that it comprises at least one polyol. [Claim 6] The composition as claimed in claim 5, characterized in that the polyol(s) are chosen from diglycerol, glycerol, propane-1, 3 -diol, octane- 1,2-diol and their mixtures, preferably from glycerol, propane-1, 3 -diol and their mixtures, better still glycerol. [Claim 7] The composition as claimed in either one of claims 5 and 6, characterized in that the polyol(s) are present in a content ranging from 5% to 40% by weight, more preferentially from 7% to 35% by weight, even better still from 7% to 30% by weight, with respect to the total weight of the composition. [Claim 8] The composition as claimed in any one of the preceding claims, characterized in that the water is present in a total amount of between 40% and 90% by weight, better still of between 50% and 80% by weight, even better still of between 50% and 75% by weight, with respect to the total weight of the composition. [Claim 9] The composition as claimed in any one of the preceding claims, characterized in that it is provided in the form of a liquid aqueous gel. [Claim 10] The use of a composition as defined in any one of claims 1 to 9 for the cosmetic treatment of keratin materials, in particular for moisturizing keratin materials, preferably the skin. [Claim 11] A method for the cosmetic treatment of keratin materials, such as the skin, in particular for moisturizing keratin materials, comprising a first stage of mixing: - a composition A) comprising at least one Tamarindus indica seed polysaccharide and water; and - a composition B) comprising at least one amino acid or one amino acid derivative as defined in claim 3, then comprising a second stage of application of said mixture to keratin materials, in order to form a gel on the keratin materials without the help of a support. [Claim 12] The method as claimed in claim 11, characterized in that the compositions A) and B) are mixed according to a 1 : 1 ratio. [Claim 13] The method as claimed in either one of claims 11 and 12, characterized in that the mixture of the compositions A) and B) is applied to keratin materials after a leave-on time of less than or equal to 5 minutes, preferably of less than or equal to 3 minutes, more preferentially of less than or equal to 2 minutes. [Claim 14] The method as claimed in any one of claims 11 to 13, characterized in that the gel formed on keratin materials after application of the mixture of the compositions A) and B) is a cohesive aqueous gel at ambient temperature. [Claim 15] The method as claimed in claim 14, characterized in that, after application of the mixture of the compositions A) and B) to the keratin materials, the cohesive aqueous gel is formed at the end of a period of time of less than or equal to 30 minutes, preferably of less than or equal to 20 minutes, more preferentially of less than or equal to 15 minutes. [Claim 16] A multicompartment kit comprising: (i) a first compartment comprising the composition A) as defined in claim 11; and (ii) a second compartment comprising the composition B) as defined in claim 11. |
Title: COMPOSITION COMPRISING AT LEAST ONE TAMARINDUS INDICA SEED POLYSACCHARIDE
[0001] The present invention relates to a cosmetic composition of keratin materials, such as the skin, in particular for moisturizing keratin materials, comprising at least one Tamarindus indica seed polysaccharide, at least one amino acid or one amino acid derivative and water.
[0002] Another subject matter of the present invention is a method for the cosmetic treatment of keratin materials, such as the skin, in particular for moisturizing keratin materials, comprising a first stage of mixing a composition A) comprising at least one Tamarindus indica seed polysaccharide and water; and a composition B) comprising at least one amino acid or one amino acid derivative, then comprising a second stage of application of said mixture to keratin materials, in order to form a gel on the keratin materials without the help of a support.
[0003] Another subject matter of the present invention is a multicompartment kit comprising, in a first compartment, the composition A) comprising at least one Tamarindus indica seed polysaccharide and water; and, in a second compartment, the composition B) comprising at least one amino acid or one amino acid derivative.
Technical field
[0004] The skin, which is a protective and exchange barrier with the environment, is both strong and fragile, it may lose its suppleness and its capacity to retain water decreases, then causing skin dryness.
[0005] The face is one of the surfaces of the body most exposed to external attacks, such as pollution, the sun and variations in temperature. This daily exposure very often results in a premature alteration to the appearance of the skin, which can become dull, become drained or also precociously exhibit wrinkles.
[0006] In order to better combat these attacks, there exist today numerous care methods which are targeted at limiting the impacts on the skin of the face by moisturizing it or by applying to it, for example, one or more cosmetic active principles. [0007] Conventionally, products of beauty mask type are well known in the cosmetics field. They can be provided in the form of a powder to be hydrated, of a gel, of an emulsion, of impregnated fabrics, of hydrogels or of a paste. Various formulations of this mask type are thus described in the literature, for example in "Cosmetic and Toiletry Formulations", Second edition, Ernest W. Flick, 1992.
[0008] These beauty masks consist of films which form upon application to the treated skin and which, after drying with a certain leave-on time, are removed by rinsing or by peeling, i.e. by pulling off, or by pilling, with the formation of more or less large pills, in particular masks based on synthetic polymers, such as polyvinylpyrrolidone or polyvinyl alcohol, or on natural polymers, such as, for example, alginates combined with calcium ions or clays.
[0009] However, the masks having a presentation form of powder to be hydrated or paste type do not provide a feeling of freshness or of moisturizing which is immediate and of long duration. Some masks are also rinsed off, thus removing a good part of the benefits contributed by the active principles present in the masks.
[0010] Furthermore, the masks having a presentation form of impregnated fabric type provide a feeling of freshness on application and good moisturizing. However, these masks involve the use of a unique format not fitting each of the face morphologies. Thus, the distribution of the moisturizing active principles is not homogeneous over the whole of the face, in particular around the mouth, the eyes and the nose.
[0011] The polysaccharide resulting from Tamarindus indica seeds is much used in cosmetics for its moisturizing properties and is known for improving the elasticity of the skin (Cosmetic Technology, Vol. 14(5), pages 17-21, 2011).
[0012] The patent KR101580809 describes a method for the manufacture of cosmetic patches in the gel form comprising a mixture of two compositions, one comprising the gum from tamarind seeds and the other comprising alcohols. However, this composition is not sufficiently fluid to be applied directly to the face and then to solidify to form the mask directly on the face at ambient temperature without use of a mold or of a support. Thus, the method as described does not make possible a homogeneous distribution of the moisturizing active principles over the whole of the face. [0013] The need thus remains to develop cosmetic compositions, in particular for moisturizing keratin materials, which are devoid of the abovementioned disadvantages.
Disclosure of the invention
[0014] Thus, the aim of the present invention is to provide a cosmetic composition which is easy to apply to the face, making it possible to form a moisturizing mask or patch directly on the face and making it possible to homogeneously moisturize all the regions of the face, particularly the area around the eyes and the mouth.
[0015] This aim is achieved with the present invention, a subject matter of which is a cosmetic composition comprising:
(i) at least one Tamarindus indica seed polysaccharide;
(ii) at least one amino acid or one amino acid derivative; and
(iii) water.
[0016] The present invention also relates to a method for the cosmetic treatment of keratin materials, such as the skin, in particular for moisturizing keratin materials, comprising a first stage of mixing:
- a composition A) comprising at least one Tamarindus indica seed polysaccharide and water; and
- a composition B) comprising at least one amino acid or one amino acid derivative, then comprising a second stage of application of said mixture to keratin materials, in order to form a gel on the keratin materials without the help of a support.
[0017] The present invention also relates to a multicompartment kit comprising:
(i) a first compartment comprising a composition A as described above; and
(ii) a second compartment comprising a composition B as described above.
[0018] Thus, it has been demonstrated that the cosmetic composition as described above makes it possible to form a moisturizing patch or mask in the form of a gel directly on keratin materials, such as the face, without the use of a mold or of a support. The composition according to the invention, after being applied to the face, solidifies on the face in order to form a moisturizing patch or mask in the form of a cohesive aqueous gel. This cohesive aqueous gel can thus be removed without rinsing the keratin materials.
[0019] Furthermore, the composition according to the invention is easily applied to all the regions of the face, using a finger or a brush, for example. The mask thus formed makes it possible to homogeneously moisturize all the regions of the face, in particular the dry regions, such as the areas around the eyes and the mouth. The composition according to the invention thus makes it possible to target regions inaccessible by conventional fabric masks, such as the areas around the eyes and the mouth.
[0020] Furthermore, the composition according to the invention can be applied in the form of a patch in order to specifically target certain regions of the face, in particular dry regions, such as the areas around the eyes and the mouth. The term “patch” is understood to mean a small device intended to be applied to the skin at specific regions of the skin, such as certain regions of the face.
[0021] The invention is not limited to the examples illustrated. The characteristics of the various examples can in particular be combined within alternative forms which are not illustrated.
[0022] The expression "at least one" means one or more.
[0023] The term "keratin materials" according to the invention is understood to mean the skin of the body, face and/or area around the eyes, the lips, the nails, the mucus membranes, the eyelashes, the eyebrows, the body hairs, the scalp and/or the hair, or any other cutaneous region of the body. More particularly, the keratin materials according to the invention are the scalp, the hair and/or the skin.
[0024] Preferably, the keratin materials according to the invention are the skin.
[0025] The term "the skin" is understood to mean all of the skin of the body, and preferably the skin of the face, neckline, neck, arms and forearms, indeed more preferably still the skin of the face, in particular of the forehead, nose, cheeks, chin and area around the eyes.
[0026] The expression "homogeneous" means a uniform distribution of the composition over the keratin materials of the user, in particular the face.
[0027] The term "liquid" is understood to mean a composition which flows when the container which contains it at ambient temperature (25°C) is tilted.
[0028] All the compositions according to the present invention are cosmetic compositions. The term "cosmetic" is understood to mean a composition compatible with the skin, the mucus membranes and the superficial body growths. [0029] Preferably, the composition according to the invention is a cosmetic composition for the treatment of keratin materials, such as the skin, preferably for moisturizing the skin.
[0030] Preferably, the method for the cosmetic treatment of keratin materials is a method for moisturizing the keratin materials, in particular the skin.
[0031] Tamarindus indica seed polysaccharide:
[0032] The composition according to the invention comprises at least one Tamarindus indica seed polysaccharide.
[0033] The tamarind tree seed polysaccharide, the INCI name of which is Tamarindus Indica Seed Polysaccharide, is mainly used as food additive and is also a thickener which can be used for cosmetics. It is a complex polysaccharide comprising, for example, as active ingredients, glucose, xylose and/or galactose.
[0034] The composition according to the invention can comprise one or more Tamarindus indica seed polysaccharides in an amount ranging from 0.05% to 10% by weight, preferably from 0.1% to 5% by weight, more preferentially from 0.5% to 3% by weight, more preferentially still from 1% to 2.5% by weight, with respect to the total weight of the composition.
[0035] Amino acid or amino acid derivative
[0036] The composition according to the invention comprises at least one amino acid or one amino acid derivative.
[0037] The term “ amino acid" is understood to mean, within the meaning of the invention, organic compounds having two functional groups: both a carboxyl -COOH or carboxylate group and an amine -NH2 group, it being possible for the amine group to be optionally methylated, that is to say in the -NR2 or N + R 3 form, where at least one R = CH 3 .
[0038] The amino acids or amino acid derivatives according to the invention can correspond to any compound chosen from synthetic or natural and modified or unmodified amino acids, their salts, their enantiomers, synthetic or natural oligomers or polymers comprising at least two amino acids, their salts and their mixtures.
[0039] Mention may in particular be made, as amino acids which can be used in the present invention, of alanine, glycine, trimethylglycine (betaine), isoleucine, methionine, proline, tyrosine, valine, cysteine, phenylalanine, tryptophan, glutamine, arginine and their mixtures.
[0040] The amino acid derivatives can also be chosen from:
- modified amino acids, in particular: N-acylamino acids, the acyl group comprising from 10 to 30 carbon atoms, preferably from 12 to 22 carbon atoms, such as, for example, amino acids, which are preferably non-polycarboxylic and/or water-insoluble (solubility of less than 1% at pH 7 and at 25°C), substituted by a lauroyl, myristoyl, palmitoyl, stearoyl, behenoyl, olivoyl or cocoyl group, such as, for example, lauroyl-L- lysine; amino acids substituted by a carboxyalkyl group, in particular a carboxymethyl group, such as carboxymethylcysteine,
- synthetic or natural oligomers or polymers comprising at least two amino acids. They can be homopolymers or copolymers of natural or modified amino acids.
[0041] Mention may be made, as homopolymers, of polylysines, poly-P-alanines or polyaspartic acids.
[0042] Mention may also be made, as amino acid oligomers or polymers, of proteins or protein hydrolyzates, such as soybean (glycine) proteins, such as, for example, the glycine soya protein dispersion sold under the reference Eleseryl HGP LS 9874 by Laboratoires Serobiologiques, or silk proteins, such as the silk protein powder sold by Croda.
[0043] Preferably, the composition comprises at least one amino acid chosen from trimethylglycine (betaine), proline and their mixtures, more preferentially trimethylglycine (betaine).
[0044] Trimethylglycine, also known as "glycine betaine" or "betaine", is a quaternary amino acid. At neutral pH, the compound exists in the form of a zwitterionic compound, forming a salt between the quaternary ammonium functional group and the carboxyl functional group of the molecule. In the presence of strong acids, it will form acid addition salts, for example hydrochloride. The compound was originally isolated from sugar beet.
[0045] Mention may be made, by way of example, of the trimethylglycine sold by Danisco under the trade name Genencare OSMS BA (INCI name: Betaine).
[0046] The composition according to the invention can comprise one or more amino acids or amino acid derivatives in a content ranging from 0.1% to 30% by weight, preferably from 1% to 25% by weight, more preferentially from 5% to 20% by weight, with respect to the total weight of the composition.
[0047] Polyols
[0048] The composition according to the invention can comprise at least one polyol. [0049] The term "polyol", within the meaning of the present invention, is understood to mean an organic compound constituted of a hydrocarbon chain optionally interrupted by one or more oxygen atoms and carrying at least two free hydroxyl (-OH) groups carried by different carbon atoms, it being possible for this compound to be cyclic or acyclic, linear or branched and saturated or unsaturated.
[0050] More particularly, the polyol(s) comprise from 2 to 30 hydroxyl groups, more preferentially from 2 to 10 hydroxyl groups, more preferentially still from 2 to 3 hydroxyl groups.
[0051] The polyol(s) are preferably chosen from di glycerol, glycerol, propylene glycol, propane-1, 3-diol, 1,3-butylene glycol, pentane- 1,2-diol, octane- 1,2-diol, dipropylene glycol, hexylene glycol, ethylene glycol, polyethylene glycols, sorbitol, sugars, such as glucose, and their mixtures.
[0052] More preferentially, the polyol(s) are chosen from diglycerol, glycerol, propane-1, 3-diol, octane- 1,2-diol and their mixtures, more preferentially still from glycerol, propane-1, 3-diol and their mixtures, better still glycerol.
[0053] Preferably, the polyol(s) are present in a total amount of greater than or equal to 5% by weight, more preferentially of greater than or equal to 7% by weight, better still of greater than or equal to 10% by weight, with respect to the total weight of the composition.
[0054] The composition can comprise one or more polyols in a content ranging from 5% to 40% by weight, more preferentially from 7% to 35% by weight, even better still from 7% to 30% by weight, with respect to the total weight of the composition.
[0055] Water:
[0056] The composition according to the invention comprises water.
[0057] The composition according to the invention can comprise water in a content of greater than or equal to 40% by weight, with respect to the total weight of the composition, preferably of greater than or equal to 50% by weight, more preferentially of greater than or equal to 60% by weight, with respect to the total weight of the composition.
[0058] By preference, the composition according to the invention comprises water in a total amount of between 40% and 90% by weight, better still of between 50% and 80% by weight, even better still of between 50% and 75% by weight, with respect to the total weight of the composition.
[0059] Organic solvents:
[0060] The composition according to the invention can also comprise one or more organic solvents other than the abovementioned polyols.
[0061] Mention may be made, as organic solvent, for example, of lower C1-C4 alkanols, such as ethanol and isopropanol; polyol ethers, such as propylene glycol monomethyl ether or diethylene glycol monoethyl ether and monomethyl ether, and also aromatic alcohols, such as benzyl alcohol or phenoxyethanol, and their mixtures.
[0062] Preferably, the composition comprises one or more organic solvents chosen from lower C1-C4 alkanols, more preferentially ethanol.
[0063] When they are present, the organic solvents are present in proportions preferably of between 0.1% and 20% by weight inclusively, with respect to the total weight of the composition, and more preferentially between 1% and 10% by weight, with respect to the total weight of the composition.
[0064] Additive
[0065] The composition according to the invention can also comprise one or more additional cosmetic and dermatological active principles.
[0066] The composition according to the invention can additionally comprise cosmetic adjuvants, according to their hydrophilic or lipophilic nature, such as opacifiers, preservatives, sunscreens, fillers, suspending agents, sequestering agents, fragrances, colorants, deodorant active principles, desquamating agents, antimicrobial agents, moisturizing agents, soothing agents, antioxidants, astringent agents, antiaging agents, antiwrinkle agents, softeners, stabilizers, vitamins or any other ingredient habitually used in cosmetics for this type of application, and their mixtures.
[0067] Of course, a person skilled in the art will take care to choose this or these optional additional compounds so that the advantageous properties intrinsically attached to the cosmetic composition in accordance with the invention are not, or not substantially, detrimentally affected by the envisaged addition(s).
[0068] Preferably, the composition comprises a “ physiologically acceptable medium". The term "physiologically acceptable medium" is understood to mean a medium which is suitable for the topical administration of a composition and which is compatible with all human keratin materials, such as the skin, the lips, the nails, the mucus membranes, the eyelashes, the eyebrows, the scalp and/or the hair, or any other cutaneous region of the body.
[0069] According to the invention, a physiologically acceptable medium is preferentially a cosmetically acceptable medium, that is to say a medium without odor or unpleasant appearance and which is entirely compatible with the topical administration route.
[0070] More particularly, the composition is suitable for topical administration, that is to say for administration by application at the surface of the keratin material under consideration, such as the skin under consideration.
[0071] This composition is in particular intended for topical application to the face and/or the body.
[0072] In particular, the composition is applied to the regions of the face, in particular the T region (forehead, nose, cheeks, chin).
[0073] Preferably, the composition according to the invention is used to moisturize, to increase the elasticity of keratin materials, such as the skin, in particular the skin of the face and/or of the body, and/or to prevent, reduce and/or treat a detrimental change in the skin.
[0074] Presentation form
[0075] The composition according to the invention is preferentially provided in the form of a liquid aqueous gel at ambient temperature (25°C) before application to keratin materials.
[0076] Preferably, once applied to keratin materials, such as the skin, the composition according to the invention becomes a cohesive aqueous gel at ambient temperature (25°C). [0077] The term “ liquid aqueous geV is understood to mean that the composition is sufficiently fluid to be easily applied to keratin materials, such as the skin, in particular the face.
[0078] The term “ cohesive aqueous ger is understood to mean that the composition solidifies to form the mask directly on keratin materials, such as the skin, in particular the face, once the composition in the form of a liquid aqueous gel is applied to said keratin materials.
[0079] Preferably, the composition according to the invention is provided first of all in the form of a liquid aqueous gel before becoming a cohesive aqueous gel once applied to keratin materials, such as the skin, in particular the face, after a few minutes. [0080] The composition according to the invention advantageously has a viscosity suitable, on the one hand, for being taken up with the finger or the brush and for homogeneous spreading over keratin materials, such as the skin, by the user at the time of application and, on the other hand, for persistence on keratin materials, such as the skin, during the leave-on time without undesirable running.
[0081] The composition has a viscosity advantageously varying from 100 centipoises to 3000 centipoises at 25°C during application. The composition according to the invention solidifies after a few minutes.
[0082] This measurement is carried out using a rheometer (Rheomat RM180 from Lamy) employing a suitable spindle (spindle 2, 3 or 4) depending on the texture of the composition. The viscosity is measured at 24 h, at ambient temperature (25°C) and at atmospheric pressure.
[0083] A person skilled in the art can choose the appropriate presentation form, and also its method of preparation, on the basis of his general knowledge, taking into account, on the one hand, the nature of the constituents used, in particular their solubility in the support, and, on the other hand, the application envisaged for the composition.
[0084] In a preferred embodiment of the invention, the composition according to the invention exhibits a pH of between 4 and 7, preferably a pH between 4 and 6.
[0085] According to a preferred embodiment, the composition according to the invention comprises at least one Tamarindus indica seed polysaccharide, at least one amino acid chosen from trimethylglycine (betaine), proline and their mixtures and optionally one or more polyols chosen from diglycerol, glycerol, propane-1, 3 -diol, octane- 1,2-diol and their mixtures.
[0086] According to a preferred embodiment, the composition according to the invention comprises at least one Tamarindus indica seed polysaccharide, trimethylglycine (betaine) and optionally one or more polyols chosen from glycerol, propane-1, 3 -diol and their mixtures.
[0087] The present invention also relates to the use of a composition as defined above for the cosmetic treatment of keratin materials, in particular for moisturizing keratin materials, preferably the skin.
[0088] Cosmetic treatment method
[0089] The present invention also relates to a method for the cosmetic treatment of keratin materials, such as the skin, in which a composition as defined above is applied to said keratin materials.
[0090] The present invention also relates to a method for the cosmetic treatment of keratin materials, such as the skin, in particular for moisturizing keratin materials, comprising a first stage of mixing:
- a composition A) comprising at least one Tamarindus indica seed polysaccharide as defined above and water; and
- a composition B) comprising at least one amino acid or one amino acid derivative as defined above, then comprising a second stage of application of said mixture to keratin materials, in order to form a gel on the keratin materials without the help of a support.
[0091] Preferably, the Tamarindus indica seed polysaccharide(s) are present in an amount ranging from 0.1% to 10% by weight, preferably from 0.5% to 7% by weight, more preferentially from 1% to 5% by weight, with respect to the total weight of the composition A).
[0092] The composition A) can also comprise at least one amino acid or one amino acid derivative. The composition A) can comprise one or more amino acids or amino acid derivatives in a content ranging from 0.5% to 30% by weight, preferably from 1% to 25% by weight, more preferentially from 2% to 20% by weight, with respect to the total weight of the composition A). [0093] The composition B) can comprise one or more amino acids or amino acid derivatives in a content ranging from 0.5% to 30% by weight, preferably from 1% to 25% by weight, more preferentially from 2% to 20% by weight, with respect to the total weight of the composition B).
[0094] The composition A) and/or the composition B) can comprise one or more polyols as described above.
[0095] Preferably, the composition A) comprises one or more polyols in a content ranging from 1% to 50% by weight, more preferentially ranging from 3% to 40% by weight, better still ranging from 3% to 30% by weight, with respect to the total weight of the composition A).
[0096] Preferably, the composition B) comprises one or more polyols in a content ranging from 5% to 70% by weight, more preferentially from 10% to 65% by weight, even better still from 15% to 63% by weight, with respect to the total weight of the composition B).
[0097] The composition B) can comprise water.
[0098] Preferably, the water is present at a content of greater than or equal to 50% by weight, with respect to the total weight of the composition A), more preferentially of greater than or equal to 60% by weight, better still of greater than or equal to 65% by weight, even better still of greater than or equal to 70% by weight, with respect to the total weight of the composition A).
[0099] The composition B) according to the invention can comprise water in a total amount of inclusively between 5% and 60% by weight, preferably of between 10% and 50% by weight, more preferentially between 15% and 45% by weight, more particularly still between 20% and 40% by weight, with respect to the total weight of the composition B).
[0100] The composition A) and the composition B) of the present invention are preferably liquids or in the powder form.
[0101] According to a preferred embodiment, the method for the cosmetic treatment of keratin materials as defined above is characterized in that it comprises a first stage of mixing:
(i) a composition A) comprising at least one Tamarindus indica seed polysaccharide, water and optionally at least one polyol, in which the polyol(s) are chosen from propane-1, 3 -diol, octane- 1,2-diol and their mixtures; and
(ii) a composition B) comprising at least one amino acid chosen from trimethylglycine (betaine), proline and their mixtures, and optionally at least one polyol, in which the polyol(s) are chosen from diglycerol, glycerol, propane-1, 3 -diol, octane- 1 ,2-diol and their mixtures, better still glycerol, propane-1, 3 -diol and their mixtures; then a second stage of application of said mixture to keratin materials, in order to form a gel on the keratin materials without the help of a support.
[0102] According to a preferred embodiment, the method for the cosmetic treatment of keratin materials as defined above is characterized in that it comprises a first stage of mixing:
(i) a composition A) comprising at least one Tamarindus indica seed polysaccharide, water and optionally at least one polyol, in which the polyol(s) are chosen from propane-1, 3 -diol, octane- 1,2-diol and their mixtures; and
(ii) a composition B) comprising trimethylglycine (betaine) and optionally at least one polyol, in which the polyol(s) are chosen from glycerol, propane-1, 3 -diol and their mixtures; then a second stage of application of said mixture to keratin materials, in order to form a gel on the keratin materials without the help of a support.
[0103] Preferably, the compositions A) and B) are mixed according to a 1 : 1 ratio. [0104] Preferably, before the application to keratin materials, such as the skin, the mixture of the compositions A) and B) is a liquid aqueous gel.
[0105] After the stage of mixing the compositions A) and B), said mixture is applied to keratin materials, such as the skin.
[0106] The mixture of the compositions A) and B) can be applied using the finger, a brush or any other means making possible homogeneous application to keratin materials, in particular the skin.
[0107] Preferably, the mixture of the compositions A) and B) is applied to the skin of the face, in particular of the forehead, nose, cheeks, chin and area around the eyes.
[0108] According to a preferred embodiment, the mixture of the compositions A) and B), i.e. the composition according to the invention, is applied to keratin materials after a leave-on time of less than or equal to 5 minutes, preferably of less than or equal to 3 minutes, more preferentially of less than or equal to 2 minutes. [0109] After application of the mixture of the compositions A) and B) to keratin materials, such as the skin, a cohesive aqueous gel is formed on the skin at ambient temperature (25°C).
[0110] According to a preferred embodiment, the gel formed on keratin materials after application of the mixture of the compositions A) and B) is a cohesive aqueous gel at ambient temperature (25°C).
[0111] According to a preferred embodiment, subsequent to the application of the mixture of the compositions A) and B) to the keratin materials, the cohesive aqueous gel is formed at the end of a period of time of less than or equal to 30 minutes, preferably of less than or equal to 20 minutes, more preferentially of less than or equal to 15 minutes. [0112] Preferably, the cohesive aqueous gel resulting from the mixture of the compositions A) and B), once applied to keratin materials, retains its gel structure until it is removed by the user.
[0113] Preferably, the cohesive aqueous gel resulting from the mixture of the compositions A) and B) is left on the keratin materials, in particular the skin, for a period of time of greater than or equal to 10 minutes, more preferentially of greater than or equal to 20 minutes, more preferentially still of greater than or equal to 30 minutes, better still of greater than or equal to 1 h.
[0114] The gel resulting from the mixture of the compositions A) and B) confers a good sensation of moisturizing of the skin during application. The gel formed on keratin materials is easily removed without rinsing in the form of a cohesive film.
[0115] The cosmetic treatment method as described above can be repeated several times, after a leave-on time varying from 1 minute to several weeks.
[0116] The present invention also relates to a multicompartment kit comprising:
(i) a first compartment comprising a composition A as described above; and
(ii) a second compartment comprising a composition B as described above.
[0117] The present invention will now be described more specifically by means of examples, which are in no way limiting of the scope of the invention. However, the examples make it possible to support specific characteristics, alternative forms and preferred embodiments of the invention. Examples
[0118] In the examples, the temperature is given in degrees Celsius and corresponds to ambient temperature (20-25°C), unless otherwise indicated, and the pressure is atmospheric pressure at sea level, unless otherwise indicated. [0119] Example 1
[0120] The following compositions 1 to 6 were prepared according to the process below:
- The composition A) is prepared from Tamarindus indica seed polysaccharide dispersed in water with vigorous stirring (for example, using a rotor/stator sold by VMI) at 25°C for 20 minutes;
- The composition B) is subsequently prepared by mixing the various compounds mentioned below in water at 25°C with stirring with a magnetic bar;
- 10 g of the composition A) are mixed with 10 g of the composition B).
[0121] The composition (A) and the composition (B) are mixed according to a 1 :1 ratio.
[0122] The mixture is stirred manually for 20 seconds before being poured into a Petri dish and will mark the t = 0.
[0123] [Table 1] [0124] [Table 2]
[0126] The appearance of the gel obtained in the Petri dish was evaluated at 30 minutes for each composition 1 to 6. The results of this study are described in detail in table 3 below.
[0127] [Table 3]
[0128] The appearance of the gel resulting from the mixture of the compositions A and B in a 1 : 1 ratio was evaluated at t = 30 min according to the following grading scale (the gradings are carried out on a scale from 1 to 6): - if the gel exhibits a grade strictly of less than 4, the aqueous gel is fluid. It flows when the Petri dish is tilted and it does not solidify at the end of 30 minutes.
- if the gel exhibits a grade ranging from 4 to 5, the aqueous gel is in the form of a liquid aqueous gel easily applicable by a user to the skin, in particular the face. It becomes a cohesive aqueous gel at the end of 30 minutes or less. This cohesive aqueous gel is elastic.
- if the gel exhibits a grade equal to 6, the aqueous gel is very solid and nonelastic. It is difficult to apply to the face by a user.
[0129] The compositions having a grade strictly of less than 4 or equal to 6 after a time t of 30 minutes in the Petri dish are regarded as nonusable in leave-on mask application.
[0130] The compositions having a grade equal to 4 or 5 after a time t of 30 minutes in the Petri dish are regarded as usable in leave-on mask application.
[0131] Thus, the compositions 1 to 4 according to the invention comprising an amino acid or amino acid derivative, such as trimethylglycine (betaine), exhibit a gel suitable for being used in the mask form.
[0132] The comparative compositions 5 and 6 are liquids and do not exhibit a gel appearance usable in the mask form.
[0133] The compositions 1 to 4 according to the invention can be applied easily to keratin materials, such as the skin, in particular to the face, so as to have a uniform distribution of the composition over all the regions of the face, before solidifying to form directly the mask on the face. Thus, the compositions according to the invention make it possible to homogeneously moisturize all the regions of the face, in particular the areas around the eyes and the mouth.
[0134] Furthermore, the application of the compositions according to the invention to the skin does not require rinsing when the mask is removed from the face.
[0135] Example 2
[0136] The following composition 7 was prepared according to the process described in example 1. [0137] [Table 4] [0138] (1) Sold under the trade name Xilogel HS by Indena
[0139] The gel obtained with the composition 7 according to the invention is a liquid aqueous gel which is applied uniformly to the face before forming a cohesive aqueous gel.
[0140] The composition 7 according to the invention confers a good sensation of moisturizing of the skin during application and over time.
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