Kit for dyeing and/or bleaching keratin fibers comprising an alkaline agent, an oxidizing agent, and an openable and closable airtight container

The present invention relates to a process for dyeing the hair, in mousse form, using a composition comprising oxidation dye precursors, and to a composition in mousse form.

Among the methods for dyeing human keratin fibres, such as the hair, mention may be made of oxidation dyeing or permanent dyeing. More particularly, this dyeing method uses one or more oxidation dyes, usually one or more oxidation bases optionally combined with one or more couplers.

In general, oxidation bases are chosen from ortho- or para-phenylenediamines, ortho- or para-aminophenols and heterocyclic compounds. These oxidation bases are colourless or weakly coloured compounds, which, when combined with oxidizing products, can give access to coloured species.

The shades obtained with these oxidation bases are often varied by combining them with one or more couplers, these couplers being chosen especially from aromatic meta-diamines, meta-aminophenols, meta-diphenols and certain heterocyclic compounds, such as indole compounds.

The variety of molecules used as oxidation bases and couplers allows a wide range of colours to be obtained.

Permanent dyeing processes thus consist in using with the dye composition an aqueous composition comprising at least one oxidizing agent such as hydrogen peroxide, under alkaline pH conditions in the vast majority of cases. The alkaline agent conventionally used is aqueous ammonia or other alkaline agents, such as alkanolamines.

Dye compositions may be in various forms, such as lotions, gels, emulsions, creams or mousses. Colouring mousses or foams are pleasant to use, but they often lack of grey hair coverage and have poor fastness over time. Rapid disappearance of the mousse after application or non-uniform application along the fibres may be observed, for example.

Coloring mousses to be formed in shaker have been proposed but quality and quantity of the mousse is not sufficient.

There is a real, constant need to develop oxidation dye compositions in the form of mousses that are easy to prepare and to apply, quality of the foam, especially in terms of volume and quantity (and which remain sufficiently stable over time while at the same time imparting efficient dyeing properties.

This aim and others are achieved by the present invention, one subject of which is thus a kit for dyeing and/or bleaching human keratin fibers, such as the hair, comprising :

- a first composition comprising at least an alkaline agent,

- a second composition comprising at least an oxidizing agent,

- at least one of the first and second compositions containing :

a) at least one associative polymer,

b) at least one anionic surfactant,

c) at least one amphoteric surfactant,

d) at least one non ionic surfactant,

an openable and closable airtight container into which the first and second compositions are charged so as to form a foam by shaking,

wherein the mixture of the first and second composition comprises a total amount of surfactants of at least 4% by weight, relative to the total weight of said mixture.

The invention also relates to a process for dyeing and/or bleaching human keratin fibres using this kit.

The present invention also provides a method for treating keratin fibres, especially dyeing and/or bleaching keratin fibres, which includes the following steps (i) to (iv): i) charging all of a first composition containing an alkali agent, a second composition containing an oxidizing agent into a main body of an openable and closable airtight container,

a) at least one of the first and second compositions containing :

b) at least one associative polymer,

c) at least one anionic surfactant,

d) at least one amphoteric surfactant,

e) at least one non ionic surfactant,

wherein the mixture of the first and second composition comprises a total amount of surfactants of at least 4% by weight, relative to the total weight of said mixture,

ii) hermetically sealing the airtight container,

iii) forming foam by shaking the airtight container, and iv) taking out the formed foam from the airtight container and applying the foam to keratin fibres.

After being introduced in the container, the first and second compositions of the invention are stirred and form an homogeneous and copious foam that is easy to take from the container, and particularly pleasant to apply. It has a light, airy texture, which makes it particularly pleasant to use.

The qualities of the mousse are sufficiently long-lasting to enable uniform application of the dye product, without running. The resulting foam composition makes it possible to conserve particularly efficient dyeing properties such as the colour strength, intensity, the resistance to external agents (shampoos, perspiration, light) and the selectivity.

Other characteristics and advantages of the invention will emerge more clearly on reading the description and the examples that follow.

In the text hereinbelow, unless otherwise indicated, the limits of a range of values are included in that range. The term "at least one" associated with an ingredient of the composition means "one or more".

The human keratin fibers treated via the process according to the invention are preferably the hair.

According to a preferred embodiment, the first composition contains at least one dye precursor and/or at least one direct dye, preferably at least one dye precursor.

Alkaline agent

The first composition comprises one or more alkaline agent(s). This agent may be chosen from mineral or organic or hybrid alkaline agents, or mixtures thereof.

The mineral alkaline agent(s) are preferably chosen from aqueous ammonia, alkali metal carbonates or bicarbonates such as sodium or potassium carbonates and sodium or potassium bicarbonates, sodium hydroxide or potassium hydroxide, or mixtures thereof.

The organic alkaline agent(s) are preferably chosen from organic amines with a pKb at 25°C of less than 12, preferably less than 10 and even more advantageously less than 6. It should be noted that it is the pKb corresponding to the function of highest basicity.

Hybrid compounds that may be mentioned include the salts of the amines mentioned previously with acids such as carbonic acid or hydrochloric acid. The organic alkaline agent(s) are chosen, for example, from alkanolamines, oxyethylenated and/or oxypropylenated ethylenediamines, amino acids and the compounds of formula (VI) below:

^RX \ / ^RZ

^ N - W - N ( ^Vl )

Ry ^x Rt

in which W is a C1-C6 alkylene residue optionally substituted with a hydroxyl group or a C-I-C6 alkyl radical; Rx, Ry, Rz and Rt, which may be identical or different, represent a hydrogen atom or a C1-C6 alkyl, C1-C6 hydroxyalkyl or C1-C6 aminoalkyl radical.

Examples of such amines that may be mentioned include 1 ,3-diaminopropane, 1 ,3-diamino-2-propanol, spermine and spermidine.

The term "alkanolamine" means an organic amine comprising a primary, secondary or tertiary amine function, and one or more linear or branched C-i-Cs alkyl groups bearing one or more hydroxyl radicals.

Alkanolamines such as monoalkanolamines, dialkanolamines or trialkanolamines comprising from one to three identical or different C1-C4 hydroxyalkyl radicals are in particular suitable for performing the invention.

Among compounds of this type, mention may be made of monoethanolamine, diethanolamine, triethanolamine, monoisopropanolamine, diisopropanolamine, N- dimethylaminoethanolamine, 2-amino-2-methyl-1-propanol, triisopropanolamine, 2- amino-2-methyl-1 ,3-propanediol, 3-amino-1 ,2-propanediol, 3-dimethylamino-1 ,2- propanediol and tris(hydroxymethylamino)methane.

More particularly, the amino acids that may be used are of natural or synthetic origin, in their L, D or racemic form, and comprise at least one acid function chosen more particularly from carboxylic acid, sulfonic acid, phosphonic acid or phosphoric acid functions. The amino acids may be in neutral or ionic form.

As amino acids that may be used in the present invention, mention may be made especially of aspartic acid, glutamic acid, alanine, arginine, ornithine, citrulline, asparagine, carnitine, cysteine, glutamine, glycine, histidine, lysine, isoleucine, leucine, methionine, N-phenylalanine, proline, serine, taurine, threonine, tryptophan, tyrosine and valine.

Advantageously, the amino acids are basic amino acids comprising an additional amine function optionally included in a ring or in a ureido function.

Such basic amino acids are preferably chosen from those corresponding to formula (VII) below: NH ₉

/

R— CH ₂ CH _X (VII)

CO ₂ H

in which R denotes a roup chosen from:

-(CH ₂ ) ₂ NH ₂ -(CH ₂ ) ₂ NHCONH ₂

The compounds corresponding to formula (VII) are histidine, lysine, arginine, ornithine and citrulline.

The organic amine may also be chosen from organic amines of heterocyclic type. Besides histidine that has already been mentioned in the amino acids, mention may be made in particular of pyridine, piperidine, imidazole, triazole, tetrazole and benzimidazole.

The organic amine may also be chosen from amino acid dipeptides. As amino acid dipeptides that may be used in the present invention, mention may be made especially of carnosine, anserine and baleine.

The organic amine is chosen from compounds comprising a guanidine function. As amines of this type that may be used in the present invention, besides arginine, which has already been mentioned as an amino acid, mention may be made especially of creatine, creatinine, 1 ,1 -dimethylguanidine, 1 ,1 - diethylguanidine, glycocyamine, metformin, agmatine, N-amidinoalanine, 3- guanidinopropionic acid, 4-guanidinobutyric acid and 2- ([amino(imino)methyl]amino)ethane-1 -sulfonic acid.

Mention may be made in particular of the use of guanidine carbonate or monoethanolamine hydrochloride as hybrid compounds.

The first composition of the invention preferably contains one or more alkanolamines and/or one or more basic amino acids, more advantageously one more alkanolamines. More preferentially still, the organic amine monoethanolamine. According to one particular embodiment, the first composition of the invention comprises as alkaline agent one or more alkanolamines. Preferably, the alkanolamine is ethanolamine (or monoethanolamine).

In one variant of the invention, the first composition of the invention comprises as alkaline agent one or more alkanolamines (preferably ethanolamine) and aqueous ammonia. In this variant, the alkanolamine(s) are present in predominant amount relative to the aqueous ammonia.

Advantageously, the first composition according to the invention has a content of alkaline agent(s) ranging from 0.01 % to 30% by weight, preferably from 0.1 % to 20% by weight and better still from 1 % to 10% by weight relative to the weight of said composition.

Dyes

According to a preferred embodiment, the first composition contains at least one dye precursor and/or at least one direct dye, preferably at least one dye precursor. Oxidation bases and couplers may be used as oxidation dye precursors.

By way of example, the oxidation bases are chosen from para- phenylenediamines, bis(phenyl)alkylenediamines, para-aminophenols, ortho- aminophenols and heterocyclic bases, and the addition salts thereof.

Among the para-phenylenediamines that may be mentioned, for example, are para-phenylenediamine, para-tolylenediamine, 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, Ν,Ν-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-fluoro-para-phenylenediamine, 2-isopropyl-para-phenylenediamine, Ν-(β- hydroxypropyl)-para-phenylenediamine, 2-hydroxymethyl-para-phenylenediamine, N,N-dimethyl-3-methyl-para-phenylenediamine, N,N-(ethyl-p-hydroxyethyl)-para- phenylenediamine, N-(p,y-dihydroxypropyl)-para-phenylenediamine, N-(4'- aminophenyl)-para-phenylenediamine, N-phenyl-para-phenylenediamine, 2-β- hydroxyethyloxy-para-phenylenediamine, 2-p-acetylaminoethyloxy-para- phenylenediamine, N-(p-methoxyethyl)-para-phenylenediamine, 4- aminophenylpyrrolidine, 2-thienyl-para-phenylenediamine, 2-p-hydroxyethylamino-5- aminotoluene, 3-hydroxy-1 -(4'-aminophenyl)pyrrolidine, and the addition salts thereof with an acid.

Among the para-phenylenediamines mentioned above, para-phenylenediamine, para-tolylenediamine, 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, are particularly preferred.

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, 1 ,8-bis(2,5-diaminophenoxy)-3,6-dioxaoctane, and the addition salts thereof.

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.

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 heterocyclic bases that may be mentioned, for example, are pyridine derivatives, pyrimidine derivatives and pyrazole derivatives.

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. Other pyridine oxidation bases that are useful in the present invention are the 3- aminopyrazolo[1 ,5-a]pyridine oxidation bases or 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 and 3-aminopyrazolo[1 ,5-a]pyridin-7-ol, and the addition salts thereof.

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.

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 -(p-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- ie f-butyl-1 -methylpyrazole, 4,5-diamino-1 -ie f-butyl-3-methylpyrazole, 4,5-diamino-1 - (p-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-hydroxymethyl- pyrazole, 4,5-diamino-3-hydroxymethyl-1 -methylpyrazole, 4,5-diamino-3- hydroxymethyl-1 -isopropylpyrazole, 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-l -methylpyrazole, and their addition salts. 4,5-diamino-1 -(p- methoxyethyl)pyrazole may also be used.

A 4,5-diaminopyrazole will preferably be used, and even more preferentially 4,5- diamino-1 -(p-hydroxyethyl)pyrazole and/or a salt thereof.

Pyrazole derivatives that may also be mentioned include diamino-N,N-dihydro- pyrazolopyrazolones 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-(pyrrolidin-1 -yl)-1 ,2- dihydropyrazol-3-one, 4-amino-5-(3-dimethylaminopyrrolidin-1 -yl)-1 ,2-diethyl-1 ,2- dihydropyrazol-3-one, 2,3-diamino-6-hydroxy-6,7-dihydro-1 H,5H-pyrazolo[1 ,2- a]pyrazol-1 -one. 2,3-Diamino-6,7-dihydro-1 H,5H-pyrazolo[1 ,2-a]pyrazol-1 -one and/or a salt thereof will preferably 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 will preferentially be used as heterocyclic bases.

Among the couplers that may be used in the first composition of the invention, mention may be made especially of meta-phenylenediamines, meta-aminophenols, meta-diphenols, naphthalene-based couplers and heterocyclic couplers, and also the addition salts thereof.

Mention may be made, for example, of 1 ,3-dihydroxybenzene, 1 ,3-dihydroxy-2- methylbenzene, 4-chloro-1 ,3-dihydroxybenzene, 2,4-diamino-1 -^-hydroxyethyloxy)- benzene, 2-amino-4-^-hydroxyethylamino)-1 -methoxybenzene, 1 ,3-diaminobenzene, 1 ,3-bis(2,4-diaminophenoxy)propane, 3-ureidoaniline, 3-ureido-1 -dimethylamino- benzene, sesamol, 1 ^-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-dimethoxy- pyridine, 1 -N-^-hydroxyethyl)amino-3,4-methylenedioxybenzene, 2,6-bis^-hydroxy- ethylamino)toluene, 6-hydroxyindoline, 2,6-dihydroxy-4-methylpyridine, 1 -H-3-methyl- pyrazol-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 and 6-methylpyrazolo[1 ,5- a]-benzimidazole, the addition salts thereof with an acid, and mixtures thereof.

The addition salts of the oxidation bases and couplers are especially chosen from the addition salts with an acid such as the hydrochlorides, hydrobromides, sulfates, citrates, succinates, tartrates, lactates, tosylates, benzenesulfonates, phosphates and acetates.

The oxidation base(s) are each generally present in an amount of from 0.0001 % to 10% by weight relative to the total weight of the first composition, and preferably from 0.005% to 5% by weight relative to the total weight of the first composition.

The coupler(s) each generally represent from 0.0001 % to 10% by weight relative to the total weight of the first composition, and preferably from 0.005% to 5% by weight relative to the total weight of the first composition.

The first composition according to the invention may contain cationic or nonionic synthetic or natural direct dyes.

Examples of particularly suitable direct dyes that may be mentioned include nitrobenzene dyes; azo direct dyes; azomethine direct dyes; methine direct dyes; azacarbocyanin direct dyes, for instance tetraazacarbocyanins (tetraazapentamethines); quinone and in particular anthraquinone, naphthoquinone or benzoquinone direct dyes; azine direct dyes; xanthene direct dyes; triarylmethane direct dyes; indoamine direct dyes; indigoid direct dyes; phthalocyanine direct dyes, porphyrin direct dyes and natural direct dyes, alone or as mixtures. In particular, mention may be made of direct dyes from among: azo; methine; carbonyl; azine; nitro (hetero)aryl; tri(hetero)arylmethane; porphyrin; phthalocyanine and natural direct dyes, alone or as mixtures.

When they are present, the direct dye(s) more particularly represent from 0.0001 % to 10% by weight and preferably from 0.005% to 5% by weight of the total weight of the first composition.

Oxidizing agent(s)

The second composition according to the invention also comprises one or more izing agent(s). The oxidizing agents are chosen, for example, from hydrogen peroxide, urea peroxide, alkali metal bromates or ferricyanides, peroxygenated salts, for instance persulfates, perborates, peracids and precursors thereof and percarbonates of alkali metals or alkaline-earth metals. Advantageously, the oxidizing agent is hydrogen peroxide.

The content of oxidizing agent(s) more particularly represents from 0.1 % to 50% by weight, preferably from 0.5% to 30% by weight and more preferably 5% to 20% relative to the weight of the second composition. The first and/or second composition of the invention comprises one or more associative polymer(s).

Associative polymers

For the purposes of the present invention, the term "associative polymers" means water-soluble polymers that are capable, in an aqueous medium, of reversibly combining with each other or with other molecules.

Their chemical structure comprises at least one hydrophilic region and at least one hydrophobic region characterized by at least one C8-C30 fatty chain.

The associative polymers according to the invention may be of anionic, cationic, amphoteric or nonionic type.

Associative polymers of anionic type:

Among these, mention may be made of:

- (A) those comprising at least one hydrophilic unit and at least one fatty-chain allyl ether unit, more particularly those whose hydrophilic unit is formed by an ethylenic unsaturated anionic monomer, more particularly a vinylcarboxylic acid and most particularly an acrylic acid or a methacrylic acid or mixtures thereof, the fatty- chain allyl ether unit of which corresponds to the monomer of formula (I) below:

CH ₂ = C ' CH ₂ O B _n R(l)

in which R' denotes H or CH3, B denotes an ethylenoxy radical, n is zero or denotes an integer ranging from 1 to 100, R denotes a hydrocarbon-based radical chosen from alkyl, arylalkyi, aryl, alkylaryl and cycloalkyi radicals, comprising from 8 to 30 carbon atoms, preferably 10 to 24 and even more particularly from 12 to 18 carbon atoms. The unit of formula (I) that is more particularly preferred is a unit in which R' denotes H, n is equal to 10, and R denotes a stearyl radical (Cis). Anionic associative polymers of this type are described and prepared, according to an emulsion polymerization process, in patent EP-0 216 479.

Among these anionic associative polymers, those that are particularly preferred according to the invention are polymers formed from 20% to 60% by weight of acrylic acid and/or of methacrylic acid, from 5% to 60% by weight of lower alkyl (meth)acrylates, from 2% to 50% by weight of fatty-chain allyl ether of formula (I), and from 0 to 1 % by weight of a crosslinking agent which is a well-known copolymerizable unsaturated polyethylenic monomer, for instance diallyl phthalate, allyl (meth)acrylate, divinylbenzene, (poly)ethylene glycol dimethacrylate or methylenebisacrylamide.

Among the latter polymers, the ones that are most particularly preferred are crosslinked terpolymers of methacrylic acid, of ethyl acrylate, of polyethylene glycol (10 EO) stearyl ether (Steareth 10), especially those sold by the company Allied

Colloids under the names Salcare SC 80® and Salcare SC 90®, which are aqueous emulsions containing 30% of a crosslinked terpolymer of methacrylic acid, of ethyl acrylate and of steareth-10 allyl ether (40/50/10).

-(B) polymers comprising at least one hydrophilic unit of unsaturated olefinic carboxylic acid type, and at least one hydrophobic unit of the type such as a (C10-C30) alkyl ester of an unsaturated carboxylic acid.

These polymers are preferably chosen from those in which the hydrophilic unit of unsaturated olefinic carboxylic acid type corresponds to the monomer of formula (I I) below:

CH ^~ C— C— OH (I I)

² I I I

R-l O

in which Ri denotes H or CH3 or C2H5, i.e. acrylic acid, methacrylic acid or ethacrylic acid units, and whose hydrophobic unit of the type such as a (C10-C30) alkyl ester of an unsaturated carboxylic acid corresponds to the monomer of formula (I II) below:

CH ^~ C— C— OR, ( M l)

² I I I ³ '

R ₂ O

in which R2 denotes H or CH3 or C2H5 (i.e. acrylate, methacrylate or ethacrylate units) and preferably H (acrylate units) or CH3 (methacrylate units), R3 denoting a C10- C30 and preferably C12-C22 alkyl radical. (Cio-C3o)alkyl esters of unsaturated carboxylic acids in accordance with the invention comprise, for example, 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.

Anionic polymers of this type are described and prepared, for example, according to patents US 3 915 921 and US 4 509 949.

Among the anionic associative polymers of this type that will be used more particularly are polymers formed from a monomer mixture comprising:

(i) essentially acrylic acid,

(ii) an ester of formula (III) described above and in which R2 denotes H or CH3, R3 denoting an alkyl radical containing from 12 to 22 carbon atoms,

(iii) and a crosslinking agent, which is a well-known copolymerizable polyethylenic unsaturated monomer, for instance diallyl phthalate, allyl (meth)acrylate, divinylbenzene, (poly)ethylene glycol dimethacrylate or methylenebisacrylamide.

Among the anionic associative polymers of this type, use will be made more particularly of those formed 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 alternatively those formed from 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 such as those described previously.

Among the said above polymers, those most particularly preferred according to the present invention are the products sold by the company Goodrich under the trade names Pemulen TR1 ®, Pemulen TR2® and Carbopol 1382®, and even more preferentially Pemulen TR1 ®, and the product sold by the company SEPPIC under the name Coatex SX®. -(C) maleic anhydride/C3o-C38 a-olefin/alkyl maleate terpolymers, such as the product (maleic anhydride/C3o-C38 a-olefin/isopropyl maleate) sold under the name Performa V 1608® by the company Newphase Technologies. -(D) acrylic terpolymers comprising:

(a) about 20% to 70% by weight of a carboxylic acid containing α,β- monoethylenic unsaturation,

(b) about 20% to 80% by weight of a non-surfactant monomer containing α,β-monoethylenic unsaturation other than (a),

(c) about 0.5% to 60% by weight of a nonionic monourethane which is the product of reaction of a monohydric surfactant with a monoisocyanate containing monoethylenic unsaturation,

such as those described in patent application EP-A-0 173 109 and more particularly the terpolymer described in Example 3, namely a methacrylic acid/methyl acrylate/behenyl alcohol dimethyl-meta-isopropenylbenzylisocyanate ethoxylated (40 EO) terpolymer, as an aqueous 25% dispersion.

- (E) copolymers comprising among their monomers a carboxylic acid containing α,β-monoethylenic unsaturation and an ester of a carboxylic acid containing α,β-monoethylenic unsaturation and of an oxyalkylenated fatty alcohol.

Preferentially, these compounds also comprise as monomer an ester of an α,β- monoethylenically unsaturated carboxylic acid and of a C1-C4 alcohol.

An example of a compound of this type that may be mentioned is Aculyn 22® sold by the company Rohm & Haas, which is a methacrylic acid/ethyl acrylate/oxyalkylenated stearyl methacrylate terpolymer.

- (F) associative polymers comprising at least one ethylenically unsaturated monomer bearing a sulfonic group, in free or partially or totally neutralized form and comprising at least one hydrophobic part.

Among the polymers of this type, mention may be made more especially of:

- crosslinked or non-crosslinked, neutralized or non-neutralized copolymers comprising from 15% to 60% by weight of AMPS (2-acrylamido-2- methylpropanesulfonic acid or salt) units and from 40% to 85% by weight of (Cs- Ci6)alkyl (meth)acrylate units relative to the polymer, such as those described in patent application EP-A-750 899; - terpolymers comprising from 10 mol% to 90 mol% of acrylamide units, from 0.1 mol% to 10 mol% of AMPS units and from 5 mol% to 80 mol% of n-(C ₆ - C8)alkylacrylamide units, such as those described in patent US 5 089 578;

- copolymers of totally neutralized AMPS and of dodecyl methacrylate, and also copolymers of AMPS and of n-dodecylmethacrylamide, which are non-crosslinked and crosslinked;

- copolymers formed from AMPS units and from steareth-25 methacrylate units, such as Aristoflex HMS sold by the company Clariant. In these anionic associative polymers, the compounds of families (B) and (E) will preferably be used.

Associative polymers of cationic type

Among these, mention may be made of:

-(Α') cationic associative polyurethanes, the family of which has been described by the Applicant in French patent application No. 00/09609; it may be represented by the general formula (la) below:

R-X-(P)n-[L-(Y) _m ] _r -L'-(P')p-X'-R' (la)

in which:

o R and R', which may be identical or different, represent a hydrophobic group or a hydrogen atom;

o X and X', which may be identical or different, represent a group comprising an amine function optionally bearing a hydrophobic group, or alternatively a group L";

o L, L' and L", which may be identical or different, represent a group derived from a diisocyanate;

o P and P', which may be identical or different, represent a group comprising an amine function optionally bearing a hydrophobic group;

o Y represents a hydrophilic group;

o r is an integer between 1 and 100 inclusive, preferably between 1 and 50 inclusive and in particular between 1 and 25 inclusive; o n, m and p are each, independently of each other, between 0 and 1000 inclusive;

the molecule containing at least one protonated or quaternized amine function and at least one hydrophobic group.

In one preferred embodiment of these polyurethanes, the only hydrophobic groups are the groups R and R' at the chain ends.

One preferred family of cationic associative polyurethanes is the one corresponding to formula (la) described above and in which:

o R and R' both independently represent a hydrophobic group, o X and X' each represent a group L",

o n and p are integers that are between 1 and 1000 inclusive, and o L, L', L", P, P', Y and m have the meaning given above.

Another preferred family of cationic associative polyurethanes is the one corresponding to formula (la) above in which:

o The fact that n and p are 0 means that these polymers do not comprise units derived from a monomer containing an amine function, incorporated into the polymer during the polycondensation.

o The protonated amine functions of these polyurethanes result from the hydrolysis of excess isocyanate functions, at the chain end, followed by alkylation of the primary amine functions formed with alkylating agents containing a hydrophobic group, i.e. compounds of the type RQ or R'Q, in which R and R' are as defined above and Q denotes a leaving group such as a halide, a sulfate, etc.

Yet another preferred family of cationic associative polyurethanes is the one corresponding to formula (la) above in which:

o R and R' both independently represent a hydrophobic group, o X and X' both independently represent a group comprising a quaternary amine, o n and p are zero, and

o L, L', Y and m have the meaning given above.

The number-average molecular mass of the cationic associative polyurethanes is preferably between 400 and 500 000, in particular between 1000 and 400 000 and ideally between 1000 and 300 000.

The expression "hydrophobic group" means a radical or polymer containing a saturated or unsaturated, linear or branched hydrocarbon-based chain, which may contain one or more heteroatoms such as P, O, N or S, or a radical containing a perfluoro or silicone chain. When the hydrophobic group denotes a hydrocarbon- based radical, it comprises at least 10 carbon atoms, preferably from 10 to 30 carbon atoms, in particular from 12 to 30 carbon atoms and more preferably from 18 to 30 carbon atoms.

Preferentially, the hydrocarbon-based group is derived from a monofunctional compound.

By way of example, the hydrophobic group may be derived from a fatty alcohol such as stearyl alcohol, dodecyl alcohol or decyl alcohol. It may also denote a hydrocarbon-based polymer, for instance polybutadiene.

When X and/or X' denote(s) a group comprising a tertiary or quaternary amine, X and/ ' may represent one of the following formulae:

^■ for X

f _{or X} .

in which:

o R2 represents a linear or branched alkylene radical containing from 1 to 20 carbon atoms, optionally comprising a saturated or unsaturated ring, or an arylene radical, one or more of the carbon atoms possibly being replaced with a heteroatom chosen from N, S, O and P; o Ri and R3, which may be identical or different, represent a linear or branched C1-C30 alkyl or alkenyl radical or an aryl radical, at least one of the carbon atoms possibly being replaced with a heteroatom chosen from N, S, O and P;

o A ^" is a physiologically acceptable anionic counterion such as a halide, for instance chloride or bromide, or mesylate.

The groups L, L' and L" represent a group of formula:

— Z-C -NH-R ₄ -NH-C -Z—

O

in which:

o Z represents -0-, -S- or -NH-; and

o R ₄ represents a linear or branched alkylene radical containing from 1 to 20 carbon atoms, optionally comprising a saturated or unsaturated ring, or an arylene radical, one or more of the carbon atoms possibly being replaced with a heteroatom chosen from N, S, O and P.

The groups P and P' comprising an amine function may represent at least one he following formulae:

or — R ₅ -CH-R ₇ — or

N

I ^ ^— CH ^— K-

^R io I

1 or Ώ

or — R,-CH-R ₇ — I L·

+io

Rg— N— Rg A

Rfi in which:

o R5 and R7 have the same meanings as R2 defined above;

o R6, Re and R9 have the same meanings as Ri and R3 defined above;

o R10 represents a linear or branched, optionally unsaturated alkylene group possibly containing one or more heteroatoms chosen from N, O, S and P; and

o A ^" is a physiologically acceptable anionic counterion such as a halide, for instance chloride or bromide, or mesylate.

As regards the meaning of Y, the term "hydrophilic group" means a polymeric or non-polymeric water-soluble group.

By way of example, when it is not a polymer, mention may be made of ethylene glycol, diethylene glycol and propylene glycol.

When it is a hydrophilic polymer, in accordance with one preferred embodiment, mention may be made, for example, of polyethers, sulfonated polyesters, sulfonated polyamides or a mixture of these polymers. The hydrophilic compound is preferentially a polyether and especially a poly(ethylene oxide) or poly(propylene oxide).

The cationic associative polyurethanes of formula (la) that may be used according to the invention are formed from diisocyanates and from various compounds bearing functions containing a labile hydrogen. The functions containing a labile hydrogen may be alcohol, primary or secondary amine or thiol functions, giving, after reaction with the diisocyanate functions, polyurethanes, polyureas and polythioureas, respectively. The term "polyurethanes in the present invention" encompasses these three types of polymer, namely polyurethanes per se, polyureas and polythioureas, and also copolymers thereof.

A first type of compound involved in the preparation of the polyurethane of formula (la) is a compound comprising at least one unit bearing an amine function. This compound may be multifunctional, but the compound is preferentially difunctional, that is to say that, according to one preferential embodiment, this compound comprises two labile hydrogen atoms borne, for example, by a hydroxyl, primary amine, secondary amine or thiol function. A mixture of multifunctional and difunctional compounds in which the percentage of multifunctional compounds is low may also be used.

As mentioned above, this compound may comprise more than one unit containing an amine function. In this case, it is a polymer bearing a repetition of the unit containing an amine function.

Compounds of this type may be represented by one of the following formulae: HZ-(P) _n -ZH,

or

HZ-(P') _p -ZH

in which Z, P, Ρ', n and p are as defined above.

Examples of compounds containing an amine function that may be mentioned include N-methyldiethanolamine, N-tert-butyldiethanolamine and N- sulfoethyldiethanolamine.

The second compound included in the preparation of the polyurethane of formula (la) is a diisocyanate corresponding to the formula:

0=C=N-R ₄ -N=C=0

in which R ₄ is as defined above.

By way of example, mention may be made of methylenediphenyl diisocyanate, methylenecyclohexane diisocyanate, isophorone diisocyanate, tolylene diisocyanate, naphthalene diisocyanate, butane diisocyanate and hexane diisocyanate.

A third compound involved in the preparation of the polyurethane of formula (la) is a hydrophobic compound intended to form the terminal hydrophobic groups of the polymer of formula (la).

This compound is formed from a hydrophobic group and a function containing a labile hydrogen, for example a hydroxyl, primary or secondary amine, or thiol function.

By way of example, this compound may be a fatty alcohol such as, in particular, stearyl alcohol, dodecyl alcohol or decyl alcohol. When this compound comprises a polymer chain, it may be, for example, D-hydroxylated hydrogenated polybutadiene.

The hydrophobic group of the polyurethane of formula (la) may also result from the quaternization reaction of the tertiary amine of the compound comprising at least one tertiary amine unit. Thus, the hydrophobic group is introduced via the quaternizing agent. This quaternizing agent is a compound of the type RQ or R'Q, in which R and R' are as defined above and Q denotes a leaving group such as a halide, a sulfate, etc. The cationic associative polyurethane may also comprise a hydrophilic block. This block is provided by a fourth type of compound involved in the preparation of the polymer. This compound may be multifunctional. It is preferably difunctional. It is also possible to have a mixture in which the percentage of multifunctional compound is low.

The functions containing a labile hydrogen are alcohol, primary or secondary amine or thiol functions. This compound may be a polymer terminated at the chain ends with one of these functions containing a labile hydrogen.

By way of example, when it is not a polymer, mention may be made of ethylene glycol, diethylene glycol and propylene glycol.

When it is a hydrophilic polymer, mention may be made, for example, of polyethers, sulfonated polyesters and sulfonated polyamides, or a mixture of these polymers. The hydrophilic compound is preferentially a polyether and especially a poly(ethylene oxide) or poly(propylene oxide).

The hydrophilic group termed Y in formula (la) is optional. Specifically, the units containing a quaternary amine or protonated function may suffice to provide the solubility or water-dispersibility required for this type of polymer in an aqueous solution.

Although the presence of a hydrophilic group Y is optional, cationic associative polyurethanes comprising such a group are, however, preferred.

- (Β') quaternized cellulose derivatives.

The quaternized cellulose derivatives are, in particular:

- i) quaternized celluloses modified with groups comprising at least one fatty chain, such as linear or branched alkyl, linear or branched arylalkyl or linear or branched alkylaryl groups comprising at least 8 carbon atoms, or mixtures thereof;

- ii) quaternized hydroxyethylcelluloses modified with groups comprising at least one fatty chain, such as linear or branched alkyl, linear or branched arylalkyl or linear or branched alkylaryl groups comprising at least 8 carbon atoms, or mixtures thereof;

- iii) the hydroxyethylcelluloses of formula (lb):

in which formula (lb):

o R and R', which may be identical or different, represent an ammonium group such as R _a RbR _c N ⁺ -, Q ^" in which R _a , Rb and R _c , which may be identical or different, represent a hydrogen atom or a linear or branched

C1-C30 and preferentially C1-C20 alkyl group, such as methyl or dodecyl; and o Q ^" represents an anionic counterion such as a halide, for instance a chloride or bromide;

o n, x and y, which may be identical or different, represent an integer between 1 and 10 000.

The alkyl radicals borne by the above quaternized celluloses i) or hydroxyethylcelluloses ii) preferably comprise from 8 to 30 carbon atoms. The aryl radicals preferably denote phenyl, benzyl, naphthyl or anthryl groups.

Examples of quaternized alkylhydroxyethylcelluloses containing C8-C30 fatty chains that may be indicated include the products Quatrisoft LM 200®, Quatrisoft LM- X529-18-A®, Quatrisoft LM-X529-18B® (C12 alkyl) and Quatrisoft LM-X529-8® (Cie alkyl) sold by the company Amerchol and the products Crodacel QM®, Crodacel QL® (C12 alkyl) and Crodacel QS® (Cis alkyl) sold by the company Croda.

Mention may also be made of the hydroxyethylcelluloses of formula (lb) in which R represents a trimethylammonium halide and R' represents a dimethyldodecylammonium halide, more preferentially R represents trimethylammonium chloride (CH3)3N ⁺ CI ^" and R' represents dimethyldodecylammonium chloride (CH3)2(Ci2H25)N ⁺ CI ^" . Polymers of this type are known under the trade name softCAT Polymer SL®, such as SL-100 and SL-60.

More particularly, the polymers of formula (lb) are those whose viscosity is between 2000 and 3000 cPs inclusive. Preferentially, the viscosity is between 2700 and 2800 cPs inclusive. Typically, softCAT Polymer SL-5 has a viscosity of 2500 cPs, softCAT Polymer SL-30 has a viscosity of 2700 cPs, softCAT Polymer SL-60 has a viscosity of 2700 cPs and softCAT Polymer SL-100 has a viscosity of 2800 cPs. (C)- Cationic polyvinyllactams, the family of which has been described by the Applicant in French patent application No. 01/01 106.

The said polymers comprise:

-a) at least one monomer of vinyllactam or alkylvinyllactam type;

-b) at least one monomer of structure (lc) or (lie) below:

in which formulae (lc) and (lie):

o X denotes an oxygen atom or a radical NR6,

o Ri and R6 denote, independently of each other, a hydrogen atom or a linear or branched C1-C5 alkyl radical,

o R2 denotes a linear or branched C1-C4 alkyl radical, o R3, R ₄ and R5 denote, independently of each other, a hydrogen atom, a linear or branched C1-C30 alkyl radical or a radical of formula (III c):

(Y ₂ )— (CH ₂ -CH(R ₇ )-O) _x — R ₈ (II lc)

- Y, Yi and Y2 denote, independently of each other, a linear or branched C2-C16 alkylene radical,

- R7 denotes a hydrogen atom or a linear or branched C1-C4 alkyl radical or a linear or branched C1-C4 hydroxyalkyl radical,

- Re denotes a hydrogen atom or a linear or branched C1-C30 alkyl radical,

o p, q and r denote, independently of each other, either the value 0 or the value 1 ,

o m and n denote, independently of each other, an integer ranging from 0 to 100 inclusive,

o x denotes an integer ranging from 1 to 100 inclusive, o Z denotes an anionic counterion of an organic or mineral acid, such as a halide, for instance chloride or bromide, or mesylate;

with the proviso that: - at least one of the substituents R3, R ₄ , R5 or Re denotes a linear or branched C9-C30 alkyl radical,

- if m or n is other than zero, then q is equal to 1 ,

- if m or n is equal to zero, then p or q is equal to 0.

The cationic poly(vinyllactam) polymers according to the invention may be crosslinked or noncrosslinked and may also be block polymers.

Preferably, the counterion Z ^" of the monomers of formula (lc) is chosen from halide ions, phosphate ions, the methosulfate ion and the tosylate ion.

Preferably, R3, R ₄ and R5 denote, independently of each other, a hydrogen atom or a linear or branched C1-C30 alkyl radical.

More preferentially, the monomer b) is a monomer of formula (lc) for which, even more preferentially, m and n are equal to 0.

The vinyllactam or alkylvinyllactam monomer is preferably a compound of structure (IVc):

CH( ₉ )= C( ₁₀ )- N-^O

( ^C ¾

in which:

o s denotes an integer ranging from 3 to 6,

o R9 denotes a hydrogen atom or a linear or branched C1-C5 alkyl radical,

o R10 denotes a hydrogen atom or a linear or branched C1-C5 alkyl radical,

with the proviso that at least one of the radicals R9 and R10 denotes a hydrogen atom.

Even more preferentially, the monomer (IVc) is vinylpyrrolidone.

The cationic poly(vinyllactam) polymers according to the invention may also contain one or more additional monomers, preferably cationic or nonionic monomers.

As compounds that are more particularly preferred according to the invention, mention may be made of the following terpolymers comprising at least:

a) one monomer of formula (IVc), b) one monomer of formula (lc) in which p=1 , q=0, R3 and R ₄ denote, independently of each other, a hydrogen atom or a C1-C5 alkyl radical and R5 denotes a linear or branched Cg-C2 ₄ alkyl radical, and

c) one monomer of formula (lie) in which R3 and R ₄ denote, independently of each other, a hydrogen atom or a linear or branched C1-C5 alkyl radical.

Even more preferentially, terpolymers comprising, by weight, 40% to 95% of monomer (a), 0.1 % to 55% of monomer (c) and 0.25% to 50% of monomer (b) will be used.

Such polymers are described in patent application WO 00/68282, the content of which forms an integral part of the invention.

As cationic poly(vinyllactam) polymers according to the invention, vinylpyrrolidone/dimethylaminopropylmethacrylamide/dodecyldi methylmethacrylamido- propylammonium tosylate terpolymers, vinylpyrrolidone/dimethylaminopropylmethacrylamide/cocoyldim ethylmethacrylamido- propylammonium tosylate terpolymers, vinylpyrrolidone/dimethylaminopropylmethacrylamide/lauryldim ethylmethacrylamido- propylammonium tosylate or chloride terpolymers are used in particular. The vinylpyrrolidone/dimethylaminopropylmethacrylamide/lauryldim ethylmethylacrylamido propylammonium chloride terpolymer is sold by the company ISP under the names Styleze W10 and Styleze W20L.

The weight-average molecular mass of the cationic poly(vinyllactam) polymers according to the present invention is preferably between 500 and 20 000 000. It is more particularly between 200 000 and 2 000 000 and even more preferentially between 400 000 and 800 000.

Associative polymers of nonionic type

According to the invention, they are preferentially chosen from:

-(1 ) celluloses modified with groups comprising at least one fatty chain;

examples that may be mentioned include:

- hydroxyethylcelluloses modified with groups comprising at least one fatty chain, such as linear or branched alkyl, linear or branched arylalkyl or linear or branched alkylaryl groups, or mixtures thereof, and in which the linear or branched alkyl groups are preferably C8-C22, for instance the product Natrosol Plus Grade 330 CS® (C16 alkyl) sold by the company Aqualon, the product Polysurf 67 CS (cetylhydroxyethylcellulose) sold by the company Ashland or the product Bermocoll EHM 100® sold by the company Berol Nobel,

- hydroxyethylcelluloses modified with alkylphenyl polyalkylene glycol ether groups, such as the product Amercell Polymer HM-1500® (polyethylene glycol (15) nonylphenyl ether) sold by the company Amerchol,

- hydroxypropylmethylcelluloses modified with linear or branched C8-C22 alkyl groups, for instance the product Sangelose 60L (INCI name: hydroxypropyl methylcellulose stearoxy ether) sold by the company Daido Chemical, -(2) hydroxypropyl guars modified with groups comprising at least one fatty chain, such as the product Esaflor HM 22® (C22 alkyl chain) sold by the company Lamberti, and the products RE210-18® (C14 alkyl chain) and RE205-1 ® (C20 alkyl chain) sold by the company Rhone-Poulenc, -(3) copolymers of vinylpyrrolidone and of fatty-chain hydrophobic monomers; examples that may be mentioned include:

the products Antaron V216® and Ganex V216® (vinylpyrrolidone/hexadecene copolymer) sold by the company ISP.

the products Antaron V220® and Ganex V220® (vinylpyrrolidone/eicosene copolymer) sold by the company ISP,

-(4) copolymers of C1-C6 alkyl methacrylates or acrylates and of amphiphilic monomers comprising at least one fatty chain, for instance the oxyethylenated methyl acrylate/stearyl acrylate copolymer sold by the company Goldschmidt under the name Antil 208®,

-(5) copolymers of hydrophilic methacrylates or acrylates and of hydrophobic monomers comprising at least one fatty chain, for instance the polyethylene glycol methacrylate/lauryl methacrylate copolymer,

-(6) polyurethane polyethers comprising in their chain both hydrophilic blocks usually of polyoxyethylenated nature and hydrophobic blocks, which may be aliphatic sequences alone and/or cycloaliphatic and/or aromatic sequences, -(7) polymers with an aminoplast ether backbone containing at least one fatty chain, such as the Pure Thix® compounds sold by the company Sud-Chemie.

Preferably, the polyurethane polyethers comprise at least two hydrocarbon- based lipophilic chains containing from 6 to 30 carbon atoms, separated by a hydrophilic block, the hydrocarbon-based chains possibly being pendent chains or chains at the end of the hydrophilic block. In particular, it is possible for one or more pendent chains to be included. In addition, the polymer may comprise a hydrocarbon- based chain at one end or at both ends of a hydrophilic block.

The polyurethane polyethers may be multiblock, in particular in triblock form.

The hydrophobic blocks may be at each end of the chain (for example: triblock copolymer containing a hydrophilic central block) or distributed both at the ends and in the chain (for example multiblock copolymer). These same polymers may also be graft polymers or star polymers.

The nonionic fatty-chain polyurethane polyethers may be triblock copolymers in which the hydrophilic block is a polyoxyethylenated chain comprising from 50 to 1000 oxyethylene groups. The nonionic polyurethane polyethers comprise a urethane bond between the hydrophilic blocks, whence arises the name.

By extension, also included among the nonionic fatty-chain polyurethane polyethers are those in which the hydrophilic blocks are linked to the lipophilic blocks via other chemical bonds.

As examples of nonionic fatty-chain polyurethane polyethers that may be used in the invention, it is also possible to use Rheolate 205® containing a urea function, sold by the company Rheox, or Rheolate® 208, 204 or 212, and also Acrysol RM 184®.

Mention may also be made of the product Elfacos T210® containing a CM-U alkyl chain, and the product Elfacos T212® containing a Cie alkyl chain, from Akzo.

The product DW 1206B® from Rohm & Haas containing a C20 alkyl chain and a urethane bond, sold at a solids content of 20% in water, may also be used.

It is also possible to use solutions or dispersions of these polymers, especially in water or in aqueous-alcoholic medium. Examples of such polymers that may be mentioned are Rheolate® 255, Rheolate® 278 and Rheolate® 244 sold by the company Rheox. The products DW 1206F and DW 1206J sold by the company Rohm & Haas may also be used. Mention may also be made of Luvigel Star (polyurethane-39) sold by the company BASF, which is a copolymer of PEG-140 and of hexamethylene diisocyanate terminated with C12-14 pareth-10, C16-18 pareth-1 1 and C18-20 pareth-1 1.

The polyurethane polyethers that may be used according to the invention are in particular those described in the article by G. Fonnum, J. Bakke and Fk. Hansen - Colloid Polym. Sci. 271 , 380-389 (1993).

Even more particularly, according to the invention, it is preferred to use a polyurethane polyether that may be obtained by polycondensation of at least three compounds comprising:

(i) at least one polyethylene glycol comprising from 150 to 180 mol of ethylene oxide,

(ii) stearyl alcohol or decyl alcohol and

(iii) at least one diisocyanate.

Such polyurethane polyethers are sold especially by the company Rohm & Haas under the names Aculyn 46® and Aculyn 44® [Aculyn 46® is a polycondensate of polyethylene glycol containing 150 or 180 mol of ethylene oxide, of stearyl alcohol and of methylenebis(4-cyclohexyl isocyanate) (SMDI), at 15% by weight in a matrix of maltodextrin (4%) and water (81 %); Aculyn 44® is a polycondensate of polyethylene glycol containing 150 or 180 mol of ethylene oxide, of decyl alcohol and of methylenebis(4-cyclohexyl isocyanate) (SMDI), at 35% by weight in a mixture of propylene glycol (39%) and water (26%)].

Associative polymers of amphoteric type

The amphoteric associative polymers are preferably chosen from those comprising at least one non-cyclic cationic unit. Even more particularly, the ones that are preferred are those prepared from or comprising 1 to 20 mol%, preferably 1 .5 to 15 mol% and even more particularly 1 .5 to 6 mol% of fatty-chain monomer relative to the total number of moles of monomers.

The amphoteric associative polymers that are preferred according to the invention comprise or are prepared by copolymerizing:

1 ) at least one monomer of formula (XIX) or (XX): A-

in which Ri and R2, which may be identical or different, represent a hydrogen atom or a methyl radical, R3, R ₄ and R5, which may be identical or different, represent a linear or branched alkyl radical containing from 1 to 30 carbon atoms,

Z represents an NH group or an oxygen atom,

n is an integer from 2 to 5,

A ^" is an anion derived from an organic or mineral acid, such as a methosulfate anion or a halide such as chloride or bromide;

2) at least one monomer of formula (XXI):

R ₆ — CH =CR ₇ — COOH

(XXI)

in which R6 and R7, which may be identical or different, represent a hydrogen atom or a methyl radical;

and

3) at least one monomer of formula (XXII):

R6 ^— CH=CR ₇ — COXR ₈ (XXII)

in which R6 and R7, which may be identical or different, represent a hydrogen atom or a methyl radical, X denotes an oxygen or nitrogen atom and Rs denotes a linear or branched alkyl radical containing from 1 to 30 carbon atoms; at least one of the monomers of formula (XIX), (XX), (XXI) or (XXII) comprising at least one fatty chain.

The monomers of formulae (XIX) and (XX) according to the present invention are preferably chosen from the group formed by: - dimethylaminoethyl methacrylate, dimethylaminoethyl acrylate,

- diethylaminoethyl methacrylate, diethylaminoethyl acrylate,

- dimethylaminopropyl methacrylate, dimethylaminopropyl acrylate,

- dimethylaminopropylmethacrylamide, dimethylaminopropylacrylamide,

these monomers optionally being quaternized, for example with a C1-C4 alkyl halide or a C1-C4 dialkyl sulfate.

More particularly, the monomer of formula (XIX) is chosen from acrylamidopropyltrimethylammonium chloride and methacrylamidopropyltrimethylammonium chloride.

The monomers of formula (XXI) are preferably chosen from the group formed by acrylic acid, methacrylic acid, crotonic acid and 2-methylcrotonic acid. More particularly, the monomer of formula (XXI) is acrylic acid.

The monomers of formula (XXII) are preferably chosen from the group formed from C12-C22 and more particularly C16-C18 alkyl acrylates or methacrylates.

The monomers constituting the fatty-chain amphoteric polymers of the invention are preferably already neutralized and/or quaternized.

The ratio of the number of cationic charges/anionic charges is preferably equal to about 1 .

The amphoteric associative polymers preferably comprise from 1 mol% to 10 mol% of the monomer comprising a fatty chain (monomer of formula (XIX), (XX) or (XXII)), and preferably from 1 .5 mol% to 6 mol%.

The weight-average molecular weights of the amphoteric associative polymers according to the invention may range from 500 to 50 000 000 and are preferably between 10 000 and 5 000 000.

The amphoteric associative polymers may also contain other monomers such as nonionic monomers and in particular such as C1-C4 alkyl acrylates or methacrylates.

Amphoteric associative polymers according to the invention are described and prepared, for example, in patent application WO 98/44012.

Among the amphoteric associative polymers, the ones that are preferred are acrylic acid/(meth)acrylamidopropyltrimethylammonium chloride/stearyl methacrylate terpolymers.

In a first variant of the invention, the associative polymers are chosen from those of families (1 ), (6), (E), (B) and (Β'). In one preferred embodiment according to the present invention, the associative polymers are chosen from those of nonionic or cationic type and even more particularly from non ionic associative polymers, as described above and more specifically from non ionic cellulose derivatives.

The associative polymer(s) may be present in an amount ranging from 0.01 % to

10% by weight, preferably in an amount ranging from 0.01 % to 5% by weight and better still in a content ranging from 0.1 % to 3% by weight relative to the total weight of the first and/or second composition. Amphoteric or zwitterionic surfactant(s)

The amphoteric or zwitterionic surfactant(s) that may be used in the present invention may especially be optionally quaternized, secondary or tertiary aliphatic amine derivatives, in which the aliphatic group is a linear or branched chain containing from 8 to 22 carbon atoms, the said amine derivatives containing at least one anionic group such as, for example, a carboxylate, sulfonate, sulfate, phosphate or phosphonate group. In particular, mention may be made of (C8-C2o)alkylbetaines, sulfobetaines, (C8-C20 alkyl)amido(C3-8 alkyl)betaines or (C8-C20 alkyl)amido(C6-C8 alkyl)sulfobetaines. Among the optionally quaternized, secondary or tertiary aliphatic amine derivatives that can be used, as defined above, mention may also be made of the compounds having the respective structures (VIII) and (VIM') below:

Ra-CONHCH2CH2- N+(Rb)(Rc)(CH2COO-) (VIII) in which:

Ra represents a C10-C30 alkyl or alkenyl group derived from an acid

Ra-COOH, preferably present in hydrolysed coconut oil, a heptyl, nonyl or undecyl group,

Rb represents a β-hydroxyethyl group, and

Rc represents a carboxymethyl group; and

Ra'-CONHCH2CH2-N(B)(B') (VIM') in which:

B represents -CH2CH2OX', B' represents with z = 1 or 2,

X' represents the group -CH ₂ -COOH, CH ₂ -COOZ\ -CH ₂ CH ₂ -COOH, -CH ₂ CH ₂ - COOZ', or a hydrogen atom,

Y' represents -COOH, -COOZ', the group -CH ₂ -CHOH-S0 ₃ H or -CH ₂ -CHOH- SOsZ',

Z' represents an ion derived from an alkali metal or alkaline-earth metal, such as sodium, an ammonium ion or an ion derived from an organic amine,

Ra' represents a C10-C30 alkyl or alkenyl group of an acid Ra'-COOH preferably present in coconut oil or in hydrolysed linseed oil, an alkyl group, especially a C17 alkyl group, and its iso form, or an unsaturated C17 group.

These compounds are classified in the CTFA dictionary, 5th edition, 1993, under the names disodium cocoamphodiacetate, disodium lauroamphodiacetate, disodium caprylamphodiacetate, disodium capryloamphodiacetate, disodium cocoamphodipropionate, disodium lauroamphodipropionate, disodium caprylamphodipropionate, disodium capryloamphodipropionate, lauroamphodipropionic acid and cocoamphodipropionic acid.

By way of example, mention may be made of the cocoamphodiacetate sold by the company Rhodia under the trade name Miranol ^® C2M Concentrate.

Among the amphoteric or zwitterionic surfactants mentioned above, use is preferably made of betaines comprising at least one saturated or unsaturated C8-C30 fatty chain and in particular the compounds of formula (A):

Ri-(CONH)x-Ai- N+(R ₂ )(R ₃ )-A ₂ -Z (A)

with

x denoting 0 or 1 ,

Ai and A ₂ denoting, independently of one another, a linear or branched

C1-C10 alkylene radical optionally substituted with a hydroxyl radical,

Ri denoting a linear or branched C6-C30 alkyl or alkenyl radical, R ₂ and R3 denoting, independently of one another, a linear or branched C1-C4 alkyl radical,

Z denoting a C0 ₂ ^" group or an SO3 ^" group.

Preferably, R ₂ and R3 denote a methyl radical.

The amphoteric surfactant(s) of betaine type used in the compositions according to the present invention may especially be (Cs- ₂ o)a Iky I betaines, (Cs- 2o)alkylsulfobetaines, (Cs- ₂ o alkyl)amido(C _2- 8 alkyl)betaines or (Cs- ₂ o alkyl)amido(C6-8 alkyl)sulfobetaines. Among the amphoteric surfactants mentioned above that are preferably used are (C ₃ -2o alkyl)betaines and (C ₃ -2o alkyl)amido(C2-8 alkyl)betaines, and mixtures thereof.

More particularly, the amphoteric surfactants of betaine type are selected from cocoylbetaine and cocamidopropylbetaine.

Preferably, the first composition contains at least one amphoteric and/or zwitterionic surfactants, preferably chosen from surfactants of betaine type, preferably (C ₃ -2o alkyl)betaines and (C ₃ -2o alkyl)amido(C2-8 alkyl)betaines, and mixtures thereof, more preferably selected from cocoylbetaine and cocamidopropylbetaine..

The amount of amphoteric and/or zwitterionic surfactants in the first and/or second composition, preferably in the first composition of the kit of the invention preferably ranges from 0.1 to 15%, by weight, preferably from 0,5 to 10% by weight and better still from 1 to 5% by weight relative to the total weight of the first and/or second composition.

Anionic surfactants

The term "anionic surfactant" means a surfactant comprising, as ionic or ionizable groups, only anionic groups. These anionic groups are preferably chosen from the following groups: C0 ₂ H, C0 ₂ ^" , S0 ₃ H, S0 ₃ ^" , OS0 ₃ H, OS0 ₃ ^" , H ₂ P0 ₃ , HP0 ₃ ^" , P0 ₃ ² -, H2PO2, H PO2, H PO2-, PO2-, POH, PO ^" .

As examples of anionic surfactants that may be used in the composition according to the invention, mention may be made of alkyi sulfates, alkyi ether sulfates, alkylamido ether sulfates, alkylaryl polyether sulfates, monoglyceride sulfates, alkyi sulfonates, alkylamide sulfonates, alkylaryl sulfonates, alpha-olefin sulfonates, paraffin sulfonates, alkyi sulfosuccinates, alkyi ether sulfosuccinates, alkylamide sulfosuccinates, alkyi sulfoacetates, acyl sarcosinates, acyl glutamates, alkyi sulfosuccinamates, acyl isethionates and N-acyltaurates, salts of alkyi monoesters of polyglycoside-polycarboxylic acids, acyl lactylates, D-galactoside- uronic acid salts, alkyi ether carboxylic acid salts, alkylaryl ether carboxylic acid salts, alkylamido ether carboxylic acid salts; and the corresponding non-salified forms of all these compounds; the alkyi and acyl groups of all these compounds comprising from 6 to 24 carbon atoms and the aryl group denoting a phenyl group.

These compounds may be oxyethylenated and then preferably comprise from 1 to 50 ethylene oxide units. The salts of Ce-24 alkyi monoesters of polyglycoside-polycarboxylic acids may be chosen from Ce-24 alkyi polyglycoside citrates, Ce-24 alkyi polyglycoside tartrates and Ce-24 alkyi polyglycoside sulfosuccinates.

When the anionic surfactant(s) (ii) are in salt form, they may be chosen from alkali metal salts such as the sodium or potassium salt and preferably the sodium salt, the ammonium salts, the amine salts and in particular amino alcohol salts or the alkaline-earth metal salts such as the magnesium salt.

Examples of amino alcohol salts that may especially be mentioned include monoethanolamine, diethanolamine and triethanolamine salts, monoisopropanolamine, diisopropanolamine or triisopropanolamine salts, 2-amino- 2-methyl-1 -propanol salts, 2-amino-2-methyl-1 ,3-propanediol salts and tris(hydroxymethyl)aminomethane salts.

Alkali metal or alkaline-earth metal salts and in particular the sodium or magnesium salts are preferably used.

Among the anionic surfactants, it is preferred, according to the invention, to use alkyi sulfate salts and alkyi ether sulfate salts and mixtures thereof.

In one preferred embodiment, the first composition comprises at least one anionic surfactant, preferably chosen from alkyi sulfate salts and alkyi ether sulfate salts and mixtures thereof.

The amount of anionic surfactants in the first and/or second composition, preferably in the first composition of the kit of the invention preferably ranges from 0,01 to 10%, by weight, preferably from 0,05 to 5% by weight and better still from 0.1 to 1 % by weight relative to the total weight of the first and/or second composition.

Nonionic surfactants

The nonionic surfactants may be chosen from monooxyalkylenated or polyoxyalkylenated, monoglycerolated or polyglycerolated nonionic surfactants. The oxyalkylene units are more particularly oxyethylene or oxypropylene units, or a combination thereof, preferably oxyethylene units.

Examples of oxyalkylenated nonionic surfactants that may be mentioned include:

• oxyalkylenated (C8-C24)alkylphenols,

• saturated or unsaturated, linear or branched, oxyalkylenated C8-C30 alcohols, · saturated or unsaturated, linear or branched, oxyalkylenated C8-C30 amides, • esters of saturated or unsaturated, linear or branched, C8-C30 acids and of polyethylene glycols,

• polyoxyethylenated esters of saturated or unsaturated, linear or branched, Cs- C30 acids and of sorbitol,

· saturated or unsaturated, oxyethylenated plant oils, such as oxyethylenated (40 or 60 EO) hydrogenated castor oil

• condensates of ethylene oxide and/or of propylene oxide, inter alia, alone or as mixtures.

The surfactants contain a number of moles of ethylene oxide and/or of propylene oxide of between 1 and 100, preferably between 2 and 50 and preferably between 2 and 30.

The oxyalkylenated nonionic surfactants are preferably chosen from oxyethylenated C8-C30 alcohols comprising from 1 to 100 mol of ethylene oxide; polyoxyethylenated esters of linear or branched, saturated or unsaturated C8-C30 acids and of sorbitol comprising from 1 to 100 mol of ethylene oxide.

As examples of monoglycerolated or polyglycerolated nonionic surfactants, monoglycerolated or polyglycerolated C8-C40 alcohols are preferably used.

In particular, the monoglycerolated or polyglycerolated C8-C40 alcohols correspond to the following formula:

RO-[CH ₂ -CH(CH ₂ OH)-0] _m -H

in which R represents a linear or branched C8-C40 and preferably C8-C30 alkyl or alkenyl radical, and m represents a number ranging from 1 to 30 and preferably from 1 to 10.

As examples of compounds that are suitable in the context of the invention, mention may be made of lauryl alcohol containing 4 mol of glycerol (INCI name: Polyglyceryl-4 Lauryl Ether), lauryl alcohol containing 1 .5 mol of glycerol, oleyl alcohol containing 4 mol of glycerol (INCI name: Polyglyceryl-4 Oleyl Ether), oleyl alcohol containing 2 mol of glycerol (INCI name: Polyglyceryl-2 Oleyl Ether), cetearyl alcohol containing 2 mol of glycerol, cetearyl alcohol containing 6 mol of glycerol, oleocetyl alcohol containing 6 mol of glycerol, and octadecanol containing 6 mol of glycerol.

The alcohol may represent a mixture of alcohols in the same way that the value of m represents a statistical value, which means that, in a commercial product, several species of polyglycerolated fatty alcohols may coexist in the form of a mixture. Among the monoglycerolated or polyglycerolated alcohols, it is more particularly preferred to use the Cs/Cio alcohol containing 1 mol of glycerol, the C10/C12 alcohol containing 1 mol of glycerol and the C12 alcohol containing 1.5 mol of glycerol.

Nonionic surfactants that may also be mentioned include non-oxyethylenated fatty acid esters of sorbitan, fatty acid esters of sucrose, optionally oxyalkylenated alkylpolyglycosides, alkylglucoside esters, derivatives of N-alkylglucamine and of N- acylmethylglucamine, aldobionamides and amine oxides.

Mention may also be made of nonionic surfactants of alkyl(poly)glycoside type, represented especially by the following general formula: RiO-(R20)t-(G) _v

in which:

- Ri represents a linear or branched alkyl or alkenyl radical comprising 6 to 24 carbon atoms and especially 8 to 18 carbon atoms, or an alkylphenyl radical whose linear or branched alkyl radical comprises 6 to 24 carbon atoms and especially 8 to 18 carbon atoms;

- R2 represents an alkylene radical comprising 2 to 4 carbon atoms,

- G represents a sugar unit comprising 5 to 6 carbon atoms,

- 1 denotes a value ranging from 0 to 10 and preferably 0 to 4,

- v denotes a value ranging from 1 to 15 and preferably 1 to 4.

Preferably, the alkylpolyglycoside surfactants are compounds of the formula described above in which:

- Ri denotes a linear or branched, saturated or unsaturated alkyl radical comprising from 8 to 18 carbon atoms,

- R2 represents an alkylene radical comprising 2 to 4 carbon atoms,

- 1 denotes a value ranging from 0 to 3 and preferably equal to 0,

- G denotes glucose, fructose or galactose, preferably glucose;

- the degree of polymerization, i.e. the value of v, possibly ranging from 1 to 15 and preferably from 1 to 4; the mean degree of polymerization more particularly being between 1 and 2.

The glucoside bonds between the sugar units are generally of 1 -6 or 1 -4 type and preferably of 1 -4 type. Preferably, the alkyl(poly)glycoside surfactant is an C8/C16 alkyl(poly)glycosides 1 ,4, and especially decyl glucosides and caprylyl/capryl glucosides, are most particularly preferred.

Among the commercial products, mention may be made of the products sold by the company COGNIS under the names PLANTAREN® (600 CS/U, 1200 and 2000) or PLANTACARE® (818, 1200 and 2000); the products sold by the company SEPPIC under the names ORAMIX CG 1 10 and ORAMIX NS 10; the products sold by the company BASF under the name LUTENSOL GD 70, or else the products sold by the company CHEM Y under the name AG10 LK.

Preferably, use is made of C8/C16-alkyl(poly)glycosides 1 ,4, especially as an aqueous 53% solution, such as those sold by Cognis under the reference

Plantacare® 818 UP.

Among the non ionic surfactants, it is preferred, according to the invention, to use alkyl(poly)glycoside such as quoted above, preferably C8/C16 alkyl(poly)glycosides 1 ,4, saturated or unsaturated, oxyethylenated plant oils, such as oxyethylenated (40 or 60 EO) hydrogenated castor oil, and mixture thereof.

According to a preferred embodiment, the first composition contains at least one non ionic surfactant, preferably chosen from saturated or unsaturated, oxyethylenated plant oils, such as oxyethylenated (40 or 60 EO) hydrogenated castor oil, and mixture thereof.

According to a preferred embodiment, the second composition contains at least one non ionic surfactant, preferably chosen from alkyl(poly)glycoside such as quoted above, preferably C8/C16 alkyl(poly)glycosides 1 ,4 and mixture thereof.

The amount of non ionic surfactants in the first and/or second composition of the kit of the invention preferably ranges from 0,5 to 20%, by weight, preferably from 1 to 15% by weight and better still from 1 .5 to 10% by weight relative to the total weight of the first and/or second composition.

According to one particular embodiment, the first composition of kit of the invention comprises one or more amphoteric surfactants, one or more nonionic surfactants and one or more anionic surfactants. According to this embodiment, the nonionic surfactant is preferably chosen from oxyethylenated fatty alcohols and oxyethylenated plant oils, which may be saturated or unsaturated. The anionic surfactant is chosen from alkyl sulfates and alkyl ether sulfates. The amphoteric surfactant is chosen from Cs-2o alkyl)betaines and (Cs-2o alkyl)amido(C2-8 alkyl)betaines, and mixtures thereof, more preferably selected from cocoylbetaine and cocamidopropylbetaine..

The total amount of surfactants (i.e. anionic, non ionic, amphoteric or zwitterionic, and cationic if present) present in the first and second compositions (i.e. in the mixture of first and second compositions) is at least 4% by weight, relative to the total weight of said mixture, preferably at least 5%, and more preferably of at least 6% by weight of the total weight of said mixture.

The total amount of surfactants in the first and second composition preferably ranges from 4% to 30% by weight, preferably from 4.5% to 20% by weight and better still from 5% to 10% by weight, relative to the total weight of the first and second composition.

The first and second compositions may also contain various adjuvants conventionally used in compositions for dyeing or lightening the hair, such as cationic surfactants, anionic, cationic or nonionic polymers differents from the associative polymers above described, or mixtures thereof; antioxidants; penetrants; sequestrants; fragrances; dispersants; film-forming agents; ceramides; preserving agents; opacifiers.

The above adjuvants are generally present in an amount for each of them of between 0.01 % and 20% by weight relative to the weight of the first and/or second composition.

Preferentially, the first and/or second composition according to the invention comprises one or more polymer chosen from amphoteric polymers, cationic polymers and mixture thereof, distinct from the associative polymers.

The term "cationic polymer" means any polymer comprising cationic groups and/or groups that can be ionized to cationic groups. Preferably, the cationic polymer is hydrophilic or amphiphilic. The preferred cationic polymers are chosen from those that contain units comprising primary, secondary, tertiary and/or quaternary amine groups that may either form part of the main polymer chain or may be borne by a side substituent directly connected thereto.

The cationic polymers that may be used preferably have a weight-average molar mass (Mw) of between 500 and 5 <10 ⁶ approximately and preferably between 10 ³ and 3x10 ⁶ approximately.

Among the cationic polymers, mention may be made more particularly of:

(1 ) homopolymers or copolymers derived from acrylic or methacrylic esters or amides and comprising at least one of the units of the following formulae:

in which:

- R3, which may be identical or different, denote a hydrogen atom or a CH3 radical; - A, which may be identical or different, represent a linear or branched divalent alkyl group of 1 to 6 carbon atoms, preferably 2 or 3 carbon atoms, or a hydroxyalkyi group of 1 to 4 carbon atoms;

- R4, R5 and R6, which may be identical or different, represent an alkyl group containing from 1 to 18 carbon atoms or a benzyl radical, preferably an alkyl group containing from 1 to 6 carbon atoms;

- R1 and R2, which may be identical or different, represent a hydrogen atom or an alkyl group containing from 1 to 6 carbon atoms, preferably methyl or ethyl;

- X denotes an anion derived from a mineral or organic acid, such as a methosulfate anion or a halide such as chloride or bromide.

The copolymers of family (1 ) may also contain one or more units derived from comonomers that may be selected from the family of acrylamides, methacrylamides, diacetone acrylamides, acrylamides and methacrylamides substituted on the nitrogen with lower (C1-C4) alkyls, acrylic or methacrylic acids or esters thereof, vinyllactams such as vinylpyrrolidone or vinylcaprolactam, and vinyl esters. (2) Cationic polysaccharides, especially cationic celluloses and galactomannan gums. Among the cationic polysaccharides, mention may be made more particularly of cellulose ether derivatives comprising quaternary ammonium groups, cationic cellulose copolymers or cellulose derivatives grafted with a water-soluble quaternary ammonium monomer and cationic galactomannan gums.

(3) Polymers formed from piperazinyl units and divalent alkylene or hydroxyalkylene radicals containing straight or branched chains, optionally interrupted with oxygen, sulfur or nitrogen atoms or with aromatic or heterocyclic rings, and also the oxidation and/or quaternization products of these polymers.

(4) Water-soluble polyamino amides prepared in particular 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 proportions ranging from 0.025 to 0.35 mol per amine group of the polyamino amide; these polyamino amides can be alkylated or, if they comprise one or more tertiary amine functions, they can be quaternized.

(5) Polyamino amide derivatives resulting from the condensation of polyalkylene polyamines with polycarboxylic acids followed by alkylation with bifunctional agents. Mention may be made, for example, of adipic acid/dialkylaminohydroxyalkyldialkylenetriamine polymers in which the alkyl radical comprises from 1 to 4 carbon atoms and preferably denotes methyl, ethyl or propyl.

(6) Polymers obtained by reacting a polyalkylene polyamine comprising two primary amine groups and at least one secondary amine group with a dicarboxylic acid chosen from diglycolic acid and saturated aliphatic dicarboxylic acids containing from 3 to 8 carbon atoms; the mole ratio between the polyalkylene polyamine and the dicarboxylic acid preferably being between 0.8:1 and 1 .4:1 ; the resulting polyamino amide being reacted with epichlorohydrin in a mole ratio of epichlorohydrin relative to the secondary amine group of the polyamino amide preferably of between 0.5:1 and 1 .8:1. (7) Cyclopolymers of alkyldiallylamine or of dialkyldiallylammonium, such as the homopolymers or copolymers containing, as main constituent of the chain, units corresponding to formula (I) or (II):

(CH ₂ )k (CH ₂ )k

\ / \

-(CH ₂ )t- CR 12 C(R ₁₂ )- CR ₁₂ C(R ₁₂ )-

H ₂ C H ₂ C

CH ₂ CH

(I) N+ (II)

Y- 3 / ^N

0 1 10

in which:

- k and t are equal to 0 or 1 , the sum k + t being equal to 1 ;

- R12 denotes a hydrogen atom or a methyl radical;

- R10 and R1 1 , independently of each other, denote a C1 -C6 alkyl group, a hydroxyl(C1 -C5)alkyl group, a C1 -C4 amidoalkyl group; or alternatively R10 and R1 1 may denote, together with the nitrogen atom to which they are attached, an heterocyclic group such as piperidinyl or morpholinyl; R10 and R1 1 , independently of each other, preferably denote a C1 -C4 alkyl group;

- Y ^" is an anion such as bromide, chloride, acetate, borate, citrate, tartrate, bisulfate, bisulfite, sulfate or phosphate.

Mention may be made more particularly of the dimethyldiallylammonium salt (for example chloride) homopolymer sold for example under the name MERQUAT 100 by the company Nalco, and the copolymers of diallyldimethylammonium salts (for example chloride) and of acrylamide, sold especially under the name MERQUAT 550 or MERQUAT 7SPR.

(8) Quaternary diammonium polymers comprising repeating units of formula:

R 13 R 15

N+ -A. - N+- B, (II I)

R X- R ^16 X-

14

in which:

- R13, R14, R15 and R16, which may be identical or different, represent aliphatic, alicyclic or arylaliphatic radicals comprising from 1 to 20 carbon atoms, or C1 -C12 hydroxyalkylaliphatic radicals, or else R13, R14, R15 and R16, together or separately, constitute, with the nitrogen atoms to which they are attached, heterocycles optionally comprising a second non- nitrogen heteroatom,

or else R13, R14, R15 and R16 represent a linear or branched C1-C6 alkyl radical substituted with a nitrile, ester, acyl, amide or -CO-0-R17-D or -CO-NH-R17-D group in which R17 is an alkylene and D is a quaternary ammonium group;

- A1 and B1 represent divalent polymethylene groups comprising from 2 to 20 carbon atoms, linear or branched, saturated or unsaturated, and which may contain, linked to or intercalated in the main chain, one or more aromatic rings or one or more oxygen or sulfur atoms or sulfoxide, sulfone, disulfide, amino, alkylamino, hydroxyl, quaternary ammonium, ureido, amide or ester groups, and

- X ^" denotes an anion derived from a mineral or organic acid;

it being understood that A1 , R13 and R15 can form, with the two nitrogen atoms to which they are attached, a piperazine ring;

in addition, if A1 denotes a linear or branched, saturated or unsaturated alkylene or hydroxyalkylene radical, B1 may also denote a group (CH2) _n -CO-D-OC-(CH2) - wherein n and p, which may be identical or different, denote an integer from 2 to 20, and wherein D denotes:

a) a glycol residue of formula -O-Z-O-, in which Z denotes a linear or branched hydrocarbon-based radical, or a group corresponding to one of the following formulae: -(CH2-CH ₂ -0)x-CH2-CH ₂ - and -[CH ₂ -CH(CH3)-0]y-CH2-CH(CH ₃ )-, where x and y denote an integer from 1 to 4, representing a defined and unique degree of polymerization or any number from 1 to 4 representing an average degree of polymerization;

b) a bis-secondary diamine residue such as a piperazine derivative;

c) a bis-primary diamine residue of formula: -NH-Y-NH-, where Y denotes a linear or branched hydrocarbon-based radical, or else the divalent radical -CH2-CH2-S-S-CH2-CH2-;

d) a ureylene group of formula: -NH-CO-NH-;

Preferably, X ^" is an anion such as chloride or bromide. These polymers have a number-average molar mass (Mn) generally of between 1000 and 100 000.

Mention may be made more particularly of polymers that are composed of repeating units corresponding to the formula: - (CH ₂ ) _p — (IV)

X ^"

in which R1 , R2, R3 and R4, which may be identical or different, denote an alkyl or hydroxyalkyl radical containing from 1 to 4 carbon atoms, n and p are integers ranging from 2 to 20, and X ^" is an anion derived from an organic or mineral acid. A particularly preferred compound of formula (IV) is that for which R1 , R2, R3 and R4 represent a methyl radical and n = 3, p = 6 and X = CI, known as Hexadimethrine chloride according to the I NCI (CTFA) nomenclature.

(9) Polyquaternary ammonium polymers comprising units of formula (V):

— N+ - (CH ₂ ) _r - NH - CO - (CH ₂ ) _q - CO - NH (CH ₂ ) _S - N+ - A—

R19 (V) R ₂₁

χ- in which:

- R18, R19, R20 and R21 , which may be identical or different, represent a hydrogen atom or a methyl, ethyl, propyl, β-hydroxyethyl, β-hydroxypropyl or -CH2CH2(OCH2CH2) OH group, in which p is equal to 0 or to an integer between 1 and 6, with the proviso that R18, R19, R20 and R21 do not simultaneously represent a hydrogen atom,

- r and s, which may be identical or different, are integers between 1 and 6,

- q is equal to 0 or to an integer between 1 and 34,

- X- denotes an anion such as a halide,

- A denotes a dihalide radical or preferably represents -CH2-CH2-O-CH2-CH2-.

(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.

(1 1 ) Polyamines such as Polyquart® H sold by Cognis, referred to under the name Polyethylene glycol (15) tallow polyamine in the CTFA dictionary.

(12) Polymers comprising in their structure:

(a) one or more units corresponding to formula (A) below: CH^— CH- NH ₂ (A)

(b) optionally, one or more units corresponding to formula (B) below:

CH ₅ — CH

(B)

NH— C-H In other words, these polymers may be chosen especially from homopolymers or copolymers comprising one or more units derived from vinylamine and optionally one or more units derived from vinylformamide.

Preferably, these cationic polymers are chosen from polymers comprising, in their structure, from 5 mol% to 100 mol% of units corresponding to formula (A) and from 0 to 95 mol% of units corresponding to formula (B), preferentially from 10 mol% to 100 mol% of units corresponding to formula (A) and from 0 to 90 mol% of units corresponding to formula (B).

The weight-average molecular mass of the said polymer, measured by light scattering, may range from 1000 to 3 000 000 g/mol, preferably from 10 000 to 1 000 000 g/mol and more particularly from 100 000 to 500 000 g/mol.

Other cationic polymers that may be used in the context of the invention are cationic proteins or cationic protein hydrolysates, polyalkyleneimines, in particular polyethyleneimines, polymers comprising vinylpyridine or vinylpyridinium units, condensates of polyamines and of epichlorohydrin, quaternary polyureylenes and chitin derivatives.

Preferably, the cationic polymers are chosen from the polymers of families (1 ), (2), (7) (8) and (10) mentioned above, preferably families (8) and (9).

Among the cationic polymers mentioned above, the ones that may preferably be used are cationic cyclopolymers, in particular dimethyldiallylammonium salt (for example chloride) homopolymers or copolymers, sold under the names Merquat 100, Merquat 550 and Merquat S by the company Nalco, hexadimethrine chloride and mixtures thereof. It is also possible to use amphoteric polymers, which may preferably be chosen from amphoteric polymers comprising a repetition of: (i) one or more units derived from a monomer of (meth)acrylamide type,

(ii) one or more units derived from a monomer of (meth)acrylamidoalkyltrialkylammonium type, and

(iii) one or more units derived from an acidic monomer of (meth)acrylic acid type.

Preferably, the units derived from a monomer of (meth)acrylamide type (i) are units of str ture (la) below:

in which Ri denotes H or CH3 and R2 is chosen from an amino, dimethylamino, tert- butylamino, dodecylamino or -NH-CI-bOH radical.

Preferably, the said amphoteric polymer comprises a repetition of only one unit of formula (la).

The unit derived from a monomer of (meth)acrylamide type of formula (la) in which Ri denotes H and R2 is an amino radical (N H2) is particularly preferred. It corresponds to the acrylamide monomer per se.

Preferably, the units derived from a monomer (meth)acrylamidoalkyltrialkylammonium type (ii) are units of structure (I la) below:

in which:

- R3 denotes H or CH3,

- R ₄ denotes a group (Chb with k being an integer ranging from 1 to 6 and preferably from 2 to 4;

- R5, R6 and R7, which may be identical or different, denote an alkyl group containing from 1 to 4 carbon atoms;

- Y ^" is an anion such as bromide, chloride, acetate, borate, citrate, tartrate, bisulfate, bisulfite, sulfate or phosphate.

Preferably, the said amphoteric polymer comprises a repetition of only one unit of formula (I la).

Among these units derived from a monomer of (meth)acrylamidoalkyltrialkylammonium type of formula (I la), the ones that are preferred are those derived from the methacrylamidopropyltrimethylammonium chloride monomer, for which R3 denotes a methyl radical, k is equal to 3, R5, R6 and R7 denote a methyl radical, and Y ^" denotes a chloride anion.

Preferably, the units derived from a monomer of (meth)acrylic acid type (iii) are units of formula (Ilia):

in which Re denotes H or CH3 and R9 denotes a hydroxyl radical or a -NH-C(CH ₃ )2-CH2-S0 ₃ H radical.

The preferred units of formula (Ilia) correspond to the acrylic acid, methacrylic acid and 2-acrylamino-2-methylpropanesulfonic acid monomers.

Preferably, the unit derived from a monomer of (meth)acrylic acid type of formula (Ilia) is that derived from acrylic acid, for which Re denotes a hydrogen atom and R9 denotes a hydroxyl radical.

The acidic monomer(s) of (meth)acrylic acid type may be non-neutralized or partially or totally neutralized with an organic or mineral base.

Preferably, the said amphoteric polymer comprises a repetition of only one unit of formula (Ilia).

According to a preferred embodiment of the invention, the amphoteric polymer(s) of this type comprise at least 30 mol% of units derived from a monomer of (meth)acrylamide type (i). Preferably, they comprise from 30 mol% to 70 mol% and more preferably from 40 mol% to 60 mol% of units derived from a monomer of (meth)acrylamide type. The content of units derived from a monomer of (meth)acrylamidoalkyltrialkylammonium type (ii) may advantageously be from 10 mol% to 60 mol% and preferentially from 20 mol% to 55 mol%.

The content of units derived from an acidic monomer of (meth)acrylic acid type (iii) may advantageously be from 1 mol% to 20 mol% and preferentially from 5 mol% to 15 mol%.

According to a particularly preferred embodiment of the invention, the amphoteric polymer of this type comprises:

- from 30 mol% to 70 mol% and more preferably from 40 mol% to 60 mol% of units derived from a monomer of (meth)acrylamide type (i),

- from 10 mol% to 60 mol% and preferentially from 20 mol% to 55 mol% of units derived from a monomer of (meth)acrylamidoalkyltrialkylammonium type (ii), and

- from 1 mol% to 20 mol% and preferentially from 5 mol% to 15 mol% of units derived from a monomer of (meth)acrylic acid type (iii).

Amphoteric polymers of this type may also comprise additional units, other than the units derived from a monomer of (meth)acrylamide type, of (meth)acrylamidoalkyltrialkylammonium type and of (meth)acrylic acid type as described above.

However, according to a preferred embodiment of the invention, the said amphoteric polymers consist solely of units derived from monomers (i) of (meth)acrylamide type, (ii) of (meth)acrylamidoalkyltrialkylammonium type and (iii) of (meth)acrylic acid type. As examples of amphoteric polymers that are particularly preferred, mention may be made of acrylamide/methacrylamidopropyltrimethylammonium chloride/acrylic acid terpolymers. Such polymers are listed in the CTFA Dictionary (International Cosmetic Ingredient Dictionary) under the name Polyquaternium 53. Corresponding products are especially sold under the names Merquat 2003 and Merquat 2003 PR by the company Nalco.

As another type of preferred amphoteric polymer that may be used, mention may also be made of copolymers based on (meth)acrylic acid and on a dialkyldiallylammonium salt, such as copolymers of (meth)acrylic acid and of dimethyldiallylammonium chloride. An example that may be mentioned is Merquat 280 sold by the company Nalco. The first and/or second composition according to the invention may comprise the cationic and/or amphoteric polymers in an amount of between 0.01 % and 5% by weight, especially from 0.05% to 3% by weight and preferentially from 0.1 % to 2% by weight, relative to the total weight of the first and/or second composition. According to a specific embodiment, the second composition contains at least a cationic and/or amphoteric polymer, preferably at least a cationic polymer, preferably chosen from cationic cyclopolymers, in particular dimethyldiallylammonium salt (for example chloride) homopolymers or copolymers. Compositions according to the invention may comprise water and/or one or more organic solvents.

Examples of organic solvents that may be mentioned include linear or branched and preferably saturated monoalcohols or diols, comprising 2 to 10 carbon atoms, such as ethanol, isopropanol, hexylene glycol (2-methyl-2,4-pentanediol), neopentyl glycol and 3-methyl-1 ,5-pentanediol, butylene glycol, dipropylene glycol and propylene glycol; aromatic alcohols such as benzyl alcohol or phenylethyl alcohol; polyols containing more than two hydroxyl functions, such as glycerol; polyol ethers, for instance ethylene glycol monomethyl, monoethyl or monobutyl ether, propylene glycol or ethers thereof, for instance propylene glycol monomethyl ether; and also diethylene glycol alkyl ethers, especially C1-C4 alkyl ethers, for instance diethylene glycol monoethyl ether or monobutyl ether, alone or as a mixture.

The organic solvents, when they are present, generally represent between 1 % and 40% by weight relative to the total weight of the dye composition, and preferably between 5% and 30% by weight relative to the total weight of the first and/or second compositions.

The first and/or second compositions are preferably aqueous. In this case, each composition preferably comprises from 30% to 95% by weight of water, better still from 40% to 90% by weight of water and even better still from 50% to 85% by weight of water relative to the total weight of the first and/or second composition.

According to a specific embodiment of the invention, the first composition of the kit of the invention comprises

- at least an alkaline agent,

a) at least one associative polymer, preferably chosen from nonionic associative polymers, more especially from non ionic cellulose derivatives. b) at least one anionic surfactant, preferably chosen from alkyl sulfate salts and alkyl ether sulfate salts and mixtures thereof,

c) at least one amphoteric surfactant, preferably chosen from surfactants of betaine type, preferably (Cs-2o alkyl)betaines and (Cs-2o alkyl)amido(C2-8 alkyl)betaines, and mixtures thereof, more preferably selected from cocoylbetaine and cocamidopropylbetaine,

d) optionnally at least one non ionic surfactant, preferably chosen from saturated or unsaturated, oxyethylenated plant oils, such as oxyethylenated (40 or 60 EO) hydrogenated castor oil, and mixture thereof.

and the second composition comprises :

at least an oxidizing agent,

at least a non ionic surfactant, preferably chosen from alkyl(poly)glycoside, preferably C8/C16 alkyl(poly)glycosides 1 ,4, and

optionally at least one amphoteric and/or one cationic polymer.

Airtight Container

The airtight container may be in any form as long as foam of the contents can be prepared by shaking the container. For example, the airtight container may be composed of a main body of container and a hermetical sealing lid, wherein the main body of container and the hermetical sealing lid may be separable or inseparable (for example, the main body and the lid may be connected each other via hinge etc. in order to open and close the lid without separation of the lid from the main body of the airtight container). Preferably, the airtight container comprises a main body and a separable sealing lid.

It is preferable that the lid does not contain any orifice, especially dispensing orifice. Preferably, the dispensing orifice is directly in contact with the inner space of the body of the container, i.e. the inner space of the body of the container is directly accessible by the user

Preferably, the dispensing orifice is defined by a part of the body of the container, for example the neck of the body. In view of productivity, the main body of a container has preferably cylindrical shape with one of the bottom surfaces being open, and an anti-tip leg may be mounted on the other bottom surface. Examples of the cylindrical shape include columnar shape, conical shape, and double conical shape. Radius from the central axis to at least a part of the side of the cylindrical shaped main body of the container is preferably 2.5 to 6 cm, more preferably 3 to 5.5 cm, and even more preferably 3 to 5 cm, in order to be easy to hold and shake with one hand, and in view of the volume of a foamed hair dye. Also, considering that the foamed hair dye is preferably scooped out by a hand, from the viewpoint of easily putting the hand into the container and easily opening and closing of the lid, the inner circumference of the opening is preferably 3 to 10 cm, more preferably 5 to 7 cm. The height of the main body of a container is preferably 5 to 22 cm, more preferably 7 to 15 cm.

When the hair dye is foamed to the utmost limit, the volume of the foamed hair dye becomes equal to the capacity of the airtight container. Therefore, the whole capacity of the airtight container, i.e., total volume of the main body and volume part of the hermetical sealing lid, is preferably 100 to 300 ml_, more preferably 150 to 250 ml_, and even more preferably 200 to 225 mL. Also, a ratio of the capacity of the airtight container (i.e., the total volume of the main body and volume part of the hermetical sealing lid) to the volume of the liquid mixture (the capacity of the airtight container/the volume of the liquid mixture), is preferably 3 to 10, more preferably 4 to 9, and even more preferably 5 to 8, from the viewpoint of preparing foam which is easily spread from the root to the tip of the hair, is hard to be dripped, and is easily formed by shaking. The hermetical sealing lid may be an outer lid which fits the container from outside or an inner lid which fits the inside of the container. Also, the shape of the hermetical sealing lid may be convex or concave shape toward the outside, or planar shape.

An embodiment of an airtight container in which the hermetical sealing lid is in a dome shape is shown in FIG. 1 . Also, as another embodiment, the airtight container may be in multiplex-structured shape where the main body is composed of two or more, preferably two members. The main body of a container is used as multiplex-structured shape in the process of distribution, storage, etc., whereas upon use, one or more of the members is used as a hermetically sealed lid. In this case, the volume of the overall container can be reduced in the process of distribution, storage, etc., while the capacity of the airtight container to be described later can be increased upon application. Also, the airtight container may have expandable and contractible means toward the depth direction. It should be noted that the capacity of an airtight container having the "expandable and contractible means" refers to a volume of the container when it is maximally expanded.

The material of the main body of a container and the hermeticai sealing lid is not particularly limited as long as it is capable of hermetically sealing with no leaks of the liquid mixture and has enough durability against shaking for forming foam, and examples thereof include plastic and paper.

The container is preferentially made of a thermoplastic material.

The airtight container, into which each composition is charged and hermetically sealed, is shaking with a hand, which can be gloved, in order to provide the liquid mixture of each agent in the state of uniform foam. Moreover, as described above, it preferably has a reasonable capacity. Accordingly, in order to prevent an airtight container from slipping out even when a small-handed user shakes the container while grabbing it with hand, the airtight container may have anti-slip means toward both the longitudinal and transverse directions on the surface thereof. The anti-slip means may have concave and/or convex shapes on the surface of the container, preferably convex shapes which provide easy grip to the pad of the finger when it is held. According to a preferred embodiment, the first and second compositions are stored separately in the kit. Each composition may be stored in for example in a tube, a sachet.

The first composition and the second composition may be packed inside the container of the kit or separately from the container in the kit.

Each composition may be in the form of a gel, a cream or a liquid. According to a specific embodiment, the first composition in the form of a gel and the second composition is in the form of a liquid. The first composition may have a viscosity at 25°C and atmospheric pressure, ranging from 300 mPa.s to 4000 mPa.s. The second composition may have a viscosity at 25°C and atmospheric pressure, ranging from 40 mPa.s to 700 mPa.s. The viscosity is measured using Rheomat RM 180 rheometer at 25° C, at a shear rate of 200 s ^"1 (using a M2 or M3 spindle).

Method or treating keratin fibers

The invention also relates to a method for treating human keratin fibres, especially a method for dyeing and/or bleaching keratin fibers, using the kit as above described. The first and second composition according to the kit of the invention are used to bleach and/or dye keratin fibres, especially the hair by performing the following steps : i) charging all of a first composition containing an alkali agent, a second composition containing an oxidizing agent into a main body of an openable and closable airtight container,

a) at least one of the first and second compositions containing :

b) at least one associative polymer,

c) at least one anionic surfactant,

d) at least one amphoteric surfactant,

e) at least one non ionic surfactant,

wherein the mixture of the first and second composition comprises a total amount of surfactants of at least 4% by weight, relative to the total weight of said mixture ,

ii) hermetically sealing the airtight container,

iii) forming foam by shaking the airtight container, and

iv) taking out the formed foam from the airtight container and applying the foam to keratin fibres.

In this method, the first and second compositions, the associative polymer, the anionic surfactant, the amphoteric surfactant, the non ionic surfactant and the airtight container are such as those described previously, including the preferred embodiments above mentioned.

Step i) : Each first and second composition may be charged in any order, or may be charged at the same time According to an embodiment, the second composition is poured in the container then the first composition is poured in the container. The first and second compositions are contact with each other after these compositions are charged into an airtight container; however, mixing of these agents is not essential at this stage.

After the charge, these agents may be mixed by stirring in advance before hermetically sealing the container in the step (ii), alternatively, these agents may be mixed at the same time as the foam is formed by shaking in the below mentioned step (iii). According to a specific embodiment, the compositions are not mixed prior shaking, i.e. the compositions are directly shaked after having been charged in the container, and the mixture of the two compositions is formed through shaking.

There may be about several minutes to 10 minutes interval between completion of the step (i) and starting the subsequent step. However, considering that the reaction derived from oxidation dye proceeds, it is preferable to immediately and sequentially proceed all the way to the step (iv) of applying the foam to the hair upon completion of the step (i). Step (ii) : the airtight container is hermetically sealed by mounting a hermetical sealing lid on the main body of the airtight container after charging all of the compositions into the main body of the airtight container. The lid is mounted so that the content is not spilled off during shaking in the below mentioned step (iii), and when the container has its own sealing mechanism, it may be sealed in accordance with the mechanism.

Step (iii) : This is a step in which foam is formed by shaking the airtight container. Although each of the compositions which have been charged in the step (i) may be mixed in advance, from the viewpoint of simplifying the operation, the compositions are preferably mixed at the same time by shaking. Although a tool may be used as means of shaking, the airtight container is preferably shaken by a hand. Although it may be shaken by one hand, from the viewpoint of securely and firmly holding the airtight container, it is preferably shaken by both hands.

Upon completion of the step (iii), the hermetical sealing lid is opened and the process proceeds to the step (iv). Step (iv) : This is a step in which the formed foam is taken out of the airtight container and applied to the hair. The foam may be applied to the whole hair or a part of the hair, in short, where to apply the foam may be decided depending on the purpose of hair dyeing and on the amount of the liquid mixture used for hair dyeing.

When taking out the formed foam from the inside of the airtight container, the foam may be transferred to another container using some means. In that case, after being transferred to a different container, the foam will be applied to the hair by some means. Alternatively, it may be also possible to scoop the foam out of the inside of the airtight container using a tool such as a comb or brush and then apply it to the hair using the tool. Alternatively, it may also be possible to scoop the foam out of the inside of the airtight container with a hand and then directly apply the scooped foam on the hand to the hair. Using a hand is preferred because the operation of applying the foam and spreading it on the hair is easy, and because splashing the foam due to excessive amount of application per one operation can be prevented, and moreover, increasing a frequency of scooping motions caused by scooping a too little amount per one operation can be prevented.

The pH of the foam which is applied on keratin fibers is generally between 3 and 12 and preferably between 5 and 1 1 . Preferably, between 7 and 1 1 limits included.

It may be adjusted to the desired value by means of acidifying or basifying agents usually used in the dyeing of keratin fibres, and in particular the alkaline agents of the invention mentioned above.

The foam may be applied to wet or dry human keratin fibres for a time that is sufficient to develop the desired coloration and/or bleaching. The dyeing and /or bleaching process is generally performed at room temperature (between 15 and 25°C) and up to temperatures that may be as high as 60°C to 80°C.

The foam may be re-foamed on the hair. The re-foaming may be performed by infusing gas or using a tool such as a vibrator and brush, or by using fingers, among these, it is preferably performed by using fingers.

After a leave-on time of from one minute to one hour and preferably from 5 minutes to 30 minutes, the human keratin fibres are rinsed with water, and optionally washed with a shampoo and then rinsed with water.

The examples that follow serve to illustrate the invention without, however, being limiting in nature. EXAMPLES

The following compositions are prepared (the amounts are expressed in g% of active material):

At the time of use, composition B is poured in the shaker first then composition A is added to it. The lid of the shaker is tightly closed and then shaken vigorously till the liquid stop moving.. The lid of shaker is then opened and foam generated is applied on hair with hand using gloves. The foam is homogeneous and copious. The foam is applied uniformly starting from covering the regrowth on roots and then spreading the foam to the lengths. Allow foam to develop color for 20 minutes and then rinsed the color thoroughly.

An intense and sparingly selective color is obtained on the hair.