A hair coloring process comprising the application of a coloring composition followed by the application of a (poly)carbodiimide compound and a specific polymer

Abstract

Title: Hair coloring process comprising the application of a coloring composition followed by the application of a (poly)carbodiimide compound and a particular polymer. The present invention relates to a hair coloring process comprising: a) the application to the hair of at least one coloring composition C comprising at least one coloring agent selected from direct dyes, oxidation dye precursors, and mixtures thereof, and optionally at least one chemical oxidizing agent; then b) the application of at least one composition T comprising: (1) at least one (poly)carbodiimide compound; (2) at least one polymer comprising at least one reactive group selected from carboxylic acids; and (3) optionally at least one silicone.

Description

Title of the invention: A hair coloring process comprising the application of a coloring composition followed by the application of a (poly)carbodiimide compound and a particular polymer

[0001] The present invention relates to a hair coloring process comprising the application of at least one coloring composition C comprising at least one particular coloring agent and then the application of at least one composition T comprising at least one (poly)carbodiimide compound, at least one particular polymer and optionally at least one silicone. technical field

[0002] In the field of hair keratin fiber coloring, it is already known to color hair keratin fibers by different techniques from direct dyes or pigments for non-permanent colorings or from dye precursors for permanent colorings.

[0003] There are essentially three types of hair coloring processes:

[0004] a) so-called permanent coloring which has the function of bringing about a significant change in the natural color and which uses oxidation dyes which penetrate the hair fiber and form the dye by a process of oxidative condensation;

[0005] b) non-permanent, semi-permanent or direct coloring, which does not implement the oxidative condensation process and resists 4 or 5 shampoos; consists of dyeing the keratin fibers with dyeing compositions containing direct dyes;

[0006] c) Temporary hair coloring that results in a change to the natural hair color that lasts from one shampoo to the next and serves to enhance or correct a previously achieved shade. It can also be considered a "makeup" process.

[0007] Another coloring method involves using pigments. Indeed, applying pigment to the surface of keratin fibers generally produces visible colors on dark hair, since the surface pigment masks the fiber's natural color. However, the colors obtained using this method have the disadvantage of being poorly resistant to shampoos and external agents such as sebum, perspiration, brushing, and / or friction.

[0008] There therefore remains a need for a hair coloring process, using direct dyes and / or precursors of oxidation dyes, which has the advantage of improving the color retention after shampooing and to the various aggressions that hair can undergo such as brushing and / or friction.

[0009] Thus, the object of the present invention is to develop a hair coloring process, colored by direct dyes and / or precursors of oxidation dyes, which has the advantage of improving the permanence of the color, to shampoos and to the various aggressions that the hair may undergo such as brushing and / or rubbing. Description of the invention

[0010] The present invention relates to a hair coloring process comprising:

[0011] a) the application to the hair of at least one coloring composition C comprising at least one coloring agent selected from direct dyes, oxidation dye precursors, and mixtures thereof, and optionally at least one chemical oxidizing agent; then

[0012] b) the application of at least one composition T comprising:

[0013] (1) at least one (poly)carbodiimide compound;

[0014] (2) at least one polymer comprising at least one reactive group selected from the carboxylic acids; and

[0015] (3) optionally at least one silicone.

[0016] Thanks to the hair coloring process according to the invention, an improvement in the persistence of the color to shampoos is obtained.

[0017] By "residual shampoo colour" in the context of the present invention, the colour obtained persists after one shampoo, preferably after 5 shampoos.

[0018] The expression "at least one" means one or more.

[0019] Unless otherwise indicated, the bounds of a range of values ​​are included in that range, in particular in the expressions "between" and "ranging from ... to ...".

[0020] The invention is not limited to the illustrated examples. The features of the different examples can, in particular, be combined within non-illustrated variants.

[0021] For the purposes of the present invention and, unless otherwise indicated,

[0022] - an "alkyl" radical designates a saturated linear or branched radical containing by example of 1 to 20 carbon atoms;

[0023] - an "aminoalkyl" radical means an alkyl radical as defined above, said alkyl radical comprising an NH2 group;

[0024] - a "hydroxyalkyl" radical means an alkyl radical as defined above, said alkyl radical comprising an OH group;

[0025] - an "alkylene" radical designates a divalent saturated hydrocarbon group at C2-C4, linear or branched, such as methylene, ethylene, or propylene;

[0026] - a "cycloalkyl" or "alicycloalkyl" radical designates a hydrocarbon group saturated cyclic mono- or polycyclic, preferably monocyclic, comprising from 1 to 3 rings, preferably 2 rings, and comprising from 3 to 24 carbon atoms, in particular comprising from 3 to 20 carbon atoms, more particularly from 3 to 13 carbon atoms, even more particularly from 3 to 12 carbon atoms, preferably between 5 and 10 carbon atoms, such as cyclopropyl, cyclopentyl, cyclohexyl, cycloheptyl, or norbornyl, in particular cyclopropyl, cyclopentyl, or a cyclohexyl. It being understood that the cycloalkyl radical may be substituted by one or more (Ci-C4)alkyl groups such as methyl, preferably the cycloalkyl radical is then an isoboromyl group.

[0027] - a "cycloalkylene" radical designates a divalent cycloalkyl group with " cycloalkyl” as defined above, preferably in C3-Ci2;

[0028] - an "aryl" radical is an unsaturated and aromatic hydrocarbon cyclic radical, comprising from 6 to 14 carbon atoms, preferably between 6 and 12 carbon atoms, mono / bi / or tri / cyclic, fused or not, preferably the aryl group comprises 1 ring of 6 carbon atoms such as phenyl, naphthyl, anthryl, phenanthryl and biphenyl, it being understood that the aryl radical may be substituted by one or more (Ci-C4)alkyl groups such as methyl, preferably tolyl, xylyl, or methylnaphthyl, preferably the aryl group represents phenyl;

[0029] - an "arylene" radical is a divalent aryl radical with "aryl" as defined previously preferred arylene represents phenylene;

[0030] - a "heterocyclic" radical designates a mono or polycyclic, saturated or unsaturated, non-aromatic or aromatic, comprising one or more heteroatoms preferably of 1 to 5 atoms chosen from O, S or N, comprising from 3 to 20 links preferably between 5 and 10 links such as imidazolyl, pyrrolyl and furanyl;

[0031] - a "heterocycloalkylene" radical is a divalent heterocyclic group with "heterocyclic" as defined above;

[0032] - an "aryloxy" radical designates an aryl-oxy radical with "aryl" as defined previously;

[0033] - an "alkoxy" radical designates an alkyl-oxy radical with "alkyl" as defined previously;

[0034] - an "acyloxy" radical designates an ester radical RC(O)-O- with R an alkyl group as defined previously;

[0035] - a "reactive" group is a group capable of forming a bond covalent with another group, identical or different, by chemical reaction.

[0036] Unless otherwise indicated, when compounds are mentioned in this application, this also includes their optical isomers, their geometric isomers, their tautomers, their salts, alone or in mixtures.

[0037] By "capillary keratin fibers" is meant hair. In other words, the expressions "capillary keratin fibers" and "hair" are equivalent in the remainder of the description.

[0038] For the purposes of the present invention, "hair" means the hair on the head. This term does not include body hair, eyebrows, or eyelashes. Colorant composition C

[0039] According to the process of the invention, the hair is pre-colored using a coloring composition C.

[0040] The coloring composition C comprises at least one coloring agent selected from direct dyes, oxidation dye precursors, and mixtures thereof. Direct dyes

[0041] By "direct dye," we mean natural and / or synthetic dyes, different from oxidation dyes. These are dyes that diffuse superficially onto the fiber. They can be ionic, for example cationic or anionic, or non-ionic.

[0042] Preferably, the direct dye(s) is / are chosen from among azo direct dyes; (poly)methine dyes such as cyanines, hemicyanines and styryls; carbonyl dyes; azine dyes; nitro(hetero)aryl dyes; tri(hetero)arylmethane dyes; porphyrin dyes; phthalocyanine dyes and natural direct dyes, alone or in the form of mixtures.

[0043] Direct dyes can be chosen from anionic direct dyes. The anionic direct dyes of the invention are dyes commonly called "acid" direct dyes because of their affinity for alkali substances. Anionic direct dyes are defined as any direct dye having in its structure at least one CO2R or SO3R substituent, where R designates a hydrogen atom, a cation from a metal or amine, or an ammonium ion. Anionic dyes can be selected from among acidic nitro direct dyes, acidic azo dyes, acidic azinic dyes, acidic triarylmethanic dyes, acidic indoamine dyes, acidic anthraquinone dyes, indigoids, and acidic natural dyes.

[0044] A titre d’exemple de colorants acides on peut citer : Acid Red 1, Acid Red 4, Acid Red 13, Acid Red 14, Acid Red 18, Acid Red 27, Acid Red 28, Acid Red 32, Acid Red 33, Acid Red 35, Acid Red 37, Acid Red 40, Acid Red 41, Acid Red 42, Acid Red 44, Pigment red 57, Acid Red 68, Acid Red 73, Acid Red 135, Acid Red 138, Acid Red 184, Food Red 1, Food Red 13, Acid Orange 6, Acid Orange 7, Acid Orange 10, Acid Orange 19, Acid Orange 20, Acid Orange 24, Yellow 6, Acid Yellow 9, Acid Yellow 36, Acid Yellow 199, Food Yellow 3; Acid Violet 7, Acid Violet 14, Acid Blue 113, Acid Blue 117, Acid Black 1, Acid Brown 4, Acid Brown 20, Acid Black 26, Acid Black 52, Food Black 1, Food Black 2 ; Food yellow 3 ou sunset yellow; Acid Red 111, Acid Red 134, Acid yellow 38 ;

[0045] A titre d’exemple de colorants azo anioniques pyrazolones on peut citer : Acid Red 195, Acid Yellow 23, Acid Yellow 27, Acid Yellow 76Acid Yellow 17 ; As an example of anthraquinone dyes, we can cite: Acid Blue 25, Acid Blue 43, Acid Blue 62, Acid Blue 78, Acid Blue 129, Acid Blue 138, Acid Blue 140, Acid Blue 251, Acid Green 25, Acid Green 41, Acid Violet 42, Acid Violet 43, Mordant Red 3; EXT purple No. 2; Acid Black 48;

[0047] Examples of nitrate dyes include: Acid Brown 13; Acid Orange 3; examples of dyes of formula (XXII') include: Acid Yellow 1, Sodium salt of 2,4-dinitro-1-naphthol-7-sulfonic acid, 2-piperidino-5-nitrobenzenesulfonic acid, 2(4'-N,N(2'-hydroxyethyl)amino-2'-nitro)aniline ethanesulfonic acid, 4-[3-hydroxyethylamino-3-nitrobenzenesulfonic acid; EXT D&C yellow 7;

[0048] Examples of triarylmethane dyes include: Acid Blue 1; Acid Blue 3; Acid Blue 7, Acid Blue 9; Acid Violet 49; Acid green 3; Acid green 5; Acid Green 50.

[0049] Examples of xanthenic dyes include: Acid Yellow 73; Acid Red 51; Acid Red 52, Acid Red 87; Acid Red 92; Acid Red 95; Acid Violet 9.

[0050] As an example of indole dyes, we can mention: Acid Blue 74;

[0051] Examples of quinoline dyes include: Acid Yellow 2, Acid Yellow 3 and Acid Yellow 5.

[0052] Among the natural direct dyes that can be used according to the invention are lawsone, juglone, alizarin, purpurin, carminic acid, kermesic acid, purpurogallin, protocatechaldehyde, indigo, isatin, curcumin, spinulosin, apigenidine, and orceins. Extracts or decoctions containing these natural dyes, and in particular henna-based poultices or extracts, can also be used.

[0053] Direct dyes are preferably chosen from ionic direct dyes, preferably from anionic direct dyes, direct dyes cationic dyes and their mixtures, more preferably among cationic dyes and their mixtures.

[0054] Advantageously, the direct colorant(s) may be present in a total quantity ranging from 0.001 to 10% by weight, preferably from 0.005 to 5% by weight relative to the total weight of composition C.

[0055] Advantageously, the ionic direct dye(s), preferably cationic, may be present in a total amount ranging from 0.001 to 10% by weight, preferably from 0.005 to 5% by weight relative to the total weight of composition C. Oxidation dye precursors

[0056] Oxidation dye precursors are chosen from oxidation bases, oxidation couplers, and mixtures thereof.

[0057] Preferably, the oxidation bases are chosen from para-phenylenediamines, bis(phenyl)alkylenediamines, para-aminophenols, ortho-aminophenols, heterocyclic bases, their corresponding addition salts, their solvates, their salts and their mixtures.

[0058] Among the para-phenylenediamines that can be mentioned, examples include para-phenylenediamine, para-toluenediamine, 2-chloro-para-phenylenediamine, 2,3-dimethyl-para-phenylenediamine, 2,6-dimethyl-para-phenylenediamine, 2,6-diethyl-para-phenylenediamine, 2,5-dimethyl-para-phenylenediamine, N,N-dimethyl-para-phenylenediamine, N,N-diethyl-para-phenylenediamine, N,N-dipropyl-para-phenylenediamine, 4-amino-N,N-diethyl-3-methylaniline, N,N-bis(β-hydroxyethyl)-para-phenylenediamine, 4-N,N-bis(β-hydroxyethyl)amino-2-methylaniline, 4-N,N-bis(β-hydroxyethyl)amino -2-chloroaniline, 2-β-hydroxyethyl-α-phenylenediamine, 2-methoxymethyl-α-phenylenediamine, 2-fluoro-α-phenylenediamine, 2-isopropyl-α-phenylenediamine, N-(β-hydroxypropyl)-α-phenylenediamine, 2-hydroxymethyl-α-phenylenediamine, N,N-dimethyl-3-methyl-α-phenylenediamine, N-ethyl-N-(β-hydroxyethyl)-α-phenylenediamine, N-(β,g-dihydroxypropyl)-para-phenylenediamine, N-(4'-aminophenyl)-para-phenylenediamine, N-phenyl-para-phenylenediamine, 2-b-hydroxyethyloxy-para-phenylenediamine, 2-b-acetylaminoethyloxy-para-phenylenediamine, N-(b-methoxyethyl)-para-phenylenediamine, 4-aminophenylpyrrolidine, 2-thienyl-para-phenylenediamine, 2-b-hydroxyethylamino-5-aminotoluene and 3-hydroxy-l-(4'-aminophenyl)pyrrolidine and the corresponding addition salts with an acid.

[0059] Among the aforementioned para-phenylenediamines, para-phenylenediamine, para-toluenediamine, 2-isopropyl-para-phenylenediamine, 2-β-hydroxyethyl-para-phenylenediamine, 2-β-hydroxyethyloxy-para-phenylenediamine, 2,6-dimethyl-para-phenylenediamine, and 2,6-diethyl- para-phenylenediamine, 2,3-dimethyl-para-phenylenediamine, N,N-bis(b-hydroxyethyl)-para-phenylenediamine, 2-chloro-para-phenylenediamine and 2-b-acetylaminoethyloxy-para-phenylenediamine and the corresponding addition salts with an acid.

[0060] Among the bis(phenyl)alkylenediamines that can be mentioned, we find for example N,N'-bis(b-hydroxyethyl)-N,N'-bis(4'-aminophenyl)-l,3-diaminopropanol, N,N'-bis(b-hydroxyethyl)-N,N'-bis(4'-aminophenyl)ethyl enediamine, N,N'-bis(4-aminophenyl)tetramethylenediamine, N,N'-bis(b-hydroxyethyl)-N,N'-bis(4-aminophenyl)tetramethylenediamine, N,N'-bis(4-methylaminophenyl)tetramethylenediamine, N,N'-bis(ethyl)-N,N'-bis(4'-amino-3'-methylphenyl)ethylenediamine and l,8-bis(2,5-diaminophenoxy)-3,6-dioxaoctane and the corresponding addition salts.

[0061] Among the para-aminophenols that are 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-(b-hydroxyethylaminomethyl)phenol and 4-amino-2-fluorophenol and the corresponding addition salts with an acid.

[0062] Among the ortho-aminophenols that can be mentioned, we find for example 2-aminophenol, 2-amino-5-methylphenol, 2-amino-6-methylphenol and 5-acetamido-2-aminophenol and the corresponding addition salts.

[0063] Among the heterocyclic bases that can be mentioned, we find for example the derivatives of pyridine, pyrimidine and pyrazole.

[0064] Among the pyridine derivatives that can be mentioned are the compounds for example described in patents GB 1 026 978 and GB 1 153 196, for example 2,5-diaminopyridine, 2-(4-methoxyphenyl)amino-3-aminopyridine and 3,4-diaminopyridine and the corresponding addition salts.

[0065] Other pyridine oxidation bases that are useful in the present invention are the 3-aminopyrazolo[l,5-a]pyridine oxidation bases or the corresponding addition salts described, for example, in French patent application FR 2 801 308. Examples that may be mentioned include pyrazolo[l,5-a]pyrid-3-ylamine, 2-acetylaminopyrazolo[l,5-a]pyrid-3-ylamine, 2-morpholin-4-ylpyrazolo[l,5-a]pyrid-3-ylamine, 3-aminopyrazolo[l,5-a]pyridine-2-carboxylic acid, 2-methoxypyrazolo[l,5-a]pyrid-3-ylamine, (3-aminopyrazolo[l,5-a]pyrid-7-yl)methanol, 2-(3-aminopyrazolo[l,5-a]pyrid-5-yl)ethanol, 2-(3-aminopyrazolo[l,5-a]pyrid-7-yl)ethanol, (3-aminopyrazolo[l,5-a]pyrid-2-yl)methamine, 3,6-diaminopyrazolo[l,5-a]pyridine, 3,4-diaminopyrazolo[l,5-a]pyridine, pyrazolo[l,5-a]pyridine-3,7-diamine, 7-morpholin-4-ylpyrazolo[l,5-a]pyrid-3-ylamine ne, pyrazolo[l,5-a]pyridine-3,5-diamine, 5-morpholin-4-ylpyrazolo[l,5-a]pyrid-3-ylamine, 2-[(3-aminopyrazolo[l,5-a]pyrid-5-yl)(2-hydroxyethyl)-amino]ethanol, 2-[(3-aminopyrazolo[l,5-a]pyrid-7-yl)(2-hydroxyethyl)amino]ethanol, 3-aminopyrazolo[l,5-a]pyridin-5-ol, 3-aminopyrazolo[l,5-a]pyridin-4-ol, 3-aminopyrazolo[l,5-a]pyridin-6-ol, 3-aminopyrazolo[l,5-a]pyridin-7-ol, 2-[3-hydroxyethoxy-3-amino-pyrazolo[l,5-a]pyridine; 2-(4-dimethylpiperazinium-l-yl)-3-amino-pyrazolo[l,5-a]pyridine; and the corresponding addition salts.

[0066] More particularly, the oxidation bases that are useful in the present invention are chosen from among the 3-aminopyrazolo-[1,5-a]-pyridines and preferably substituted at carbon atom 2 by:

[0067] a) a (di)(Ci-C6)(alkyl)amino group, said alkyl group being able to be substituted by at least one hydroxy, amino, imidazolium group;

[0068] b) a heterocycloalkyl group containing 5 to 7 members and 1 to 3 heteroatoms, optionally cationic, optionally substituted by one or more (Ci-C6)alkyl groups, such as a di(Ci-C4)alkylpiperazinium group; or

[0069] c) a (Ci-C6)alkoxy group optionally substituted by one or more hydroxy groups such as a [3-hydroxyalkoxy] group and the corresponding addition salts.

[0070] Among the pyrimidine derivatives that can be mentioned are the compounds described, for example, in 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, where a tautomeric equilibrium exists.

[0071] Among the pyrazole derivatives that may be mentioned are the compounds described in 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-l-methylpyrazole, 4,5-diamino-l-(b-hydroxyethyl)pyrazole, 3,4-diaminopyrazole, 4,5-diamino-l-(4'-chlorobenzyl)pyrazole, 4,5-diamino-l,3-dime thylpyrazole, 4,5-diamino-3-methyl-l-phenylpyrazole, 4,5-diamino-l-methyl-3-phenylpyrazole, the 4-amino-l,3-dimethyl-5-hydrazinopyrazole, l-benzyl-4,5-diamino-3-methylpyrazole, 4,5-diamino-3-tert-butyl-1-methylpyrazole, 4,5-diamino-l-tert-butyl-3-methylpyrazole, 4,5-diamino-l-(b-hydroxyethyl)-3-methylpyrazole, 4,5-diamino-l-ethyl-3-methylpyrazole, 4,5-diamino-l-ethyl-3-(4'-methoxyphenyl)pyrazole, 4,5-diamino-l-ethyl-3-hydroxymethylpyrazole, 4,5-diamino-3-hydroxymethyl-1-methylpyrazole, 4,5-diamino-3-hydroxymethyl-l-isopropylpyrazole, 4,5-diamino-3-methyl-l-isopropylpyrazole, 4-amino-5-(2'- , aminoethyl)amino-l,3-dimethylpyrazole, 3,4,5-triaminopyrazole, l-methyl-3,4,5-triaminopyrazole, 3,5-diamino-l-methyl-4-methylaminopyrazole, 3,5-diamino-4-(b-hydroxyethyl)amino-l-methylpyrazole and the corresponding addition salts. 4,5-diamino-l-(b-methoxyethyl)pyrazole may also be used.

[0072] A 4,5-diaminopyrazole will preferably be used and even more preferably 4,5-diamino-l-(b-hydroxyethyl)pyrazole and / or a corresponding salt, for example 4,5-diamino-l-(b-hydroxyethyl)pyrazole sulfate.

[0073] Pyrazole derivatives that may also be mentioned include diamino-N,N-dihydropyrazolopyrazolones and in particular those described in patent application FR-A-2 886 136, such as the following compounds and the corresponding addition salts: 2,3-diamino-6,7-dihydro-1H,5H-pyrazolo[1H,2-a]pyrazol-1-one, 2-amino-3-ethylamino-6,7-dihydro-1H,5H-pyrazolo[1H,2-a]pyrazol-1-one, 2-amino-3-isopropylamino-6,7-dihydro-1H,5H-pyrazolo[1H,2-a]pyrazol-1-one, 2-amino-3-(pyrrolidin-1H-yl)-6,7-dihydro-1H,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-lH,5H-pyrazolo[1,2-a]pyrazol-1-one, 2-amino-3-dimethylamino-6,7-dihydro-lH,5H-pyrazolo[l,2-a]pyrazol-l-one, 2,3-diamino-5,6,7,8-tetrahydro-lH, 6H-pyridazino [1,2-a]pyrazol-1 -one, the 4-amino-1,2-diethyl-5-(pyrrolidin-1 - y 1) -1,2-dih ydropyrazol-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-1H,5H-pyrazolo[1,2-a]pyrazol-1-one. ,

[0074] Preferably, among the oxidation bases, para-toluenediamine, para-aminophenol, 4,5-diamino-l-(b-hydroxyethyl)pyrazole sulfate, and mixtures thereof will be used.

[0075] Preferably, the oxidation couplers are chosen from meta-phenylenediamines, meta-aminophenols, meta-diphenols, naphthalene-based coupling agents and heterocyclic coupling agents, their corresponding addition salts, their solvates, their salts and their mixtures.

[0076] Examples include 1,3-dihydroxybenzene, 1,3-dihydroxy-2-methylbenzene, 4-chloro-1,3-dihydroxybenzene, 2,4-diamino-1-(β-hydroxyethylamino)benzene, 2-amino-4-(β-hydroxyethylamino)-1-methoxybenzene, 1,3-diaminobenzene, 1,3-bis(2,4-diaminophenoxy)propane, 3-ureidoaniline, 3-ureido-1-dimethylaminobenzene, sesamol, 1β-hydroxyethylamino-3,4-methylenedioxybenzene, α-naphtol, 2-methyl-1-naphtol, 6-hydroxyindole, 4-hydroxyindole, 4-hydroxy-N-methylindole, 2-amino-3-hydroxypyridine, 6-hydroxybenzomorpholine, 3,5-diamino-2,6-dimethoxypyridine, 1-N-(B- hydroxyethyl)amino-3,4-methylenedioxybenzene, 2,6-bis(B-hydroxyethylamino)toluene, 4-amino-2-hydroxytoluene, 2-methyl-5-hydroxyethylaminophenol, 6-hydroxyindoline, 2,6-dihydroxy-4-methylpyridine, 1H-3-methylpyrazol-5-one, 1-phenyl-3-methylpyrazol-5-one, 2,6-dimethylpyrazolo[l,5-b]-l,2,4-triazole, 2,6-dimethyl[3,2-c]-l,2,4-triazole and 6-methylpyrazolo[l,5-a]benzimidazole, 2-methyl-5-aminophenol, 5-N-(B-hydroxyethyl)amino-2-methylphenol, 3-aminophenol, 3-amino-2-chloro-6-methylphenol, the 5-amino-6-chloro-o-cresol, 2-[3-amino-4-methoxyphenyl]amino)ethanol the corresponding addition salts with an acid.

[0077] Preferably, among the oxidation couplers, 4-amino-2-hydroxytoluene, 2-methyl-5-hydroxyethylaminophenol, 6-hydroxyindole, 5-amino-6-chloro-o-cresol, and mixtures thereof shall be used.

[0078] In general, the addition salts of oxidation bases or oxidation couplers that can be used in the context of the invention are in particular chosen from among the addition salts with an acid, such as hydrochlorides, hydrobromides, sulfates, citrates, succinates, tartrates, lactates, tosylates, benzenesulfonates, phosphates and acetates.

[0079] Advantageously, when the oxidation dye precursor(s) are present in composition C, the total content of oxidation dye precursor(s) ranges from 0.01 to 20% by weight, preferably from 0.05 to 15% by weight, more preferably from 0.1 to 10% by weight, even more preferably from 0.5 to 10% by weight, better from 0.7 to 6% by weight, relative to the total weight of composition C.

[0080] Advantageously, when the oxidation base(s) are present in composition C, the total content of oxidation base(s) ranges from 0.01 to 20% by weight, preferably from 0.05 to 15% by weight, more preferably from 0.1 to 10% by weight, even more preferably from 0.3 to 10% by weight, better from 0.5 to 5% by weight relative to the total weight of composition C.

[0081] Advantageously, when the oxidation coupler(s) are present in composition C, the total content of oxidation coupler(s) ranges from 0.01 to 20% by weight, preferably from 0.05 to 15% by weight, more preferably from 0.1 to 10% by weight, even more preferably from 0.5 to 10% by weight, better from 0.7 to 3% by weight relative to the total weight of composition C.

[0082] Advantageously, the colouring agent(s) chosen from among direct colourings, oxidation colour precursors, and mixtures thereof, is / are present in composition C in a content ranging from 0.001 to 20% by weight, preferably from 0.005 to 15% by weight, relative to the total weight of composition C. Chemical oxidizing agents

[0083] Composition C may further comprise at least one chemical oxidizing agent.

[0084] For the purposes of this invention, "chemical oxidizing agent" means an oxidizing agent other than oxygen from the air.

[0085] The chemical oxidizing agent(s) (or bleaching agent(s) usable in the present invention may be chosen from hydrogen peroxide, urea peroxide, alkali metal bromates, persalts such as perborates and persulfates, in particular sodium persulfate, potassium persulfate and ammonium persulfate, peracids and oxidase enzymes (with their possible cofactors) including peroxidases, 2-electron oxidoreductases such as uricases and 4-electron oxygenases such as laccases, and mixtures thereof; more preferably, the chemical oxidizing agent(s) are chosen from hydrogen peroxide, persalts, and mixtures thereof, even more preferably from hydrogen peroxide.

[0086] According to a preferred embodiment, composition C comprises at least one chemical oxidizing agent, preferably hydrogen peroxide.

[0087] According to another embodiment, composition C does not contain a chemical oxidizing agent.

[0088] Advantageously, when composition C includes at least one chemical oxidizing agent, the total content of chemical oxidizing agent(s) ranges from 0.1 to 40% by weight, preferably from 1 to 30% by weight, more preferably from 5 to 20% by weight, even more preferably from 6 to 20% by weight relative to the total weight of composition C. Organic solvents

[0089] Composition C used in the process according to the invention may comprise one or more organic solvents.

[0090] Examples of organic solvents include lower C1-C4 alkanols such as ethanol and isopropanol; polyols and polyol ethers such as 2-butoxyethanol, 1,2-hexanediol, propylene glycol, pentylene glycol, propylene glycol monomethyl ether, diethylene glycol monoethyl ether and monomethyl ether, as well as aromatic alcohols, in particular aromatic monoalcohols such as benzyl alcohol, phenoxyethanol, and mixtures thereof.

[0091] Organic solvents may be present in a total content of between 1 and 80% by weight, preferably between 5 and 70% by weight and more preferably between 10 and 40% by weight relative to the total weight of composition C.

[0092] Composition C used in the process according to the invention may be aqueous. The water content may range from 1 to 90% by weight, preferably from 10 to 80%. in weight, more preferably from 20 to 75% by weight relative to the total weight of composition C. Additives

[0093] Composition C used in the process according to the invention may contain any adjuvant or additive usually used.

[0094] Among the additives that may be contained in the composition, we can mention reducing agents, softeners, anti-foaming agents, moisturizing agents, clays, mineral fillers, UV filters, peptizers, perfumes, anionic, cationic, non-ionic or amphoteric surfactants, proteins, vitamins, polymers, preservatives, oils, waxes other than silicones in wax form, and mixtures thereof.

[0095] According to a particular embodiment, composition C is free of (poly)carbodiimide compound as described below. Composition T Polycarbodiimide compound

[0096] The composition T used in the process according to the invention comprises at least one (poly)carbodiimide compound.

[0097] The composition may comprise at least two distinct (poly)carbodiimide compounds, present in mixture in the composition.

[0098] The term "(poly)carbodiimide compound" means a compound comprising one or more carbodihnide group(s), preferably at least two carbodiimide groups, more preferably at least three carbodihnide groups; in particular, the number of carbodiimide groups does not exceed 200, preferably 150, more preferably 100.

[0099] The term “carbodiimide group” means a divalent linear triatomic fraction of general formula - (N=C=N) -.

[0100] The (poly)carbodiimide compound(s) according to the invention may optionally comprise in their structure one or more reactive groups other than carbodiimide groups, selected from alkoxysilyl, hydroxysilyl, acetoxysilyl, vinylsilyl, acrylalkylsilyl, methacrylalkylsilyl, crotonylalkylsilyl, carboxyanhydridoalkylsilyl, carboxyalkylsilyl, hydroxyalkylsilyl, aldehydoalkylsilyl, mercaptoalkylsilyl, norbomenylsilyl, acylpentadienylalkylsilyl, maleimidoalkylsilyl, sulphonylalkylsilyl, (meth)acrylalkyl, crotonylalkyl, alkyl epoxide such as propyl epoxide or butyl epoxide and azacyclopropane.

[0101] The reactive group(s) other than the carbodiimide groups may be pendant or terminal. Preferably, the (poly)carbodiimide compound(s) comprise one or more terminal groups other than the carbodiimide, preferably one or more terminal groups selected from the following alkoxysilyl, hydroxysilyl, acetoxysilyl, vinylsilyl, acrylalkylsilyl, methacrylalkylsilyl, crotonylalkylsilyl, carboxyanhydridoalkylsilyl, carboxyalkylsilyl, hydroxyalkylsilyl, aldehydoalkylsilyl, mercaptoalkylsilyl, norbornenylsilyl, acylpentadienylalkylsilyl, maleimidoalkylsilyl, sulfonylmylalkylsilyl, (meth)acrylalkyl, crotonylalkyl, alkyl epoxide groups such as propyl epoxide or butyl epoxide and azacyclopropane.

[0102] According to a particular embodiment, the (poly)carbodiimide compound is chosen from the compounds of the following formula (I): on jy R^Xf" ......R> HL: J "H"

[0103] in which:

[0104] - Xi and X2 represent, independently, an oxygen atom O, a sulfur atom S or an NH group;

[0105] - Ri and R2 independently represent a grouping chosen from a radical hydrocarbon, preferably alkyl, possibly interrupted by one or more heteroatoms, a group selected from the following groups: alkoxysilyl, hydroxysilyl, acetoxysilyl, vinylsilyl, acrylalkylsilyl, methacrylalkylsilyl, crotonylalkylsilyl, carboxyanhydridoalkylsilyl, carboxyalkylsilyl, hydroxyalkylsilyl, aldehydoalkylsilyl, mercaptoalkylsilyl, norbornenylsilyl, acylpentadienylalkylsilyl, maleimidoalkylsilyl, sulfonylmylsilyl, (meth)acrylalkyl, crotonylalkyl, alkyl epoxide such as propyl epoxide or butyl epoxide, and azacyclopropane, and a hydrocarbon radical, preferably alkyl, possibly interrupted by one or more heteroatoms and by one or more groups selected from the following groups: alkoxysilyl, hydroxysilyl, acetoxysilyl, vinylsilyl, acrylalkylsilyl, methacrylalkylsilyl, crotonylalkylsilyl, carboxyanhydridoalkylsilyl, carboxyalkylsilyl, hydroxyalkylsilyl, aldehyde alkylsilyl, mercaptoalkylsilyl, norbornenylsilyl,acylpentadienylalkylsilyl, maleimidoalkylsilyl, sulfonylmylalkylsilyl, (meth)acrylalkyl, crotonylalkyl, alkyl epoxides such as propyl epoxide or butyl epoxide, and azacyclopropane; ,

[0106] - n denotes an integer from 1 to 1000; and

[0107] - A is a monomer selected from the compounds below:

[0108] According to another embodiment, the (poly)carbodiimide compound is chosen from the compounds of the following formula (!'): (D

[0109] in which:

[0110] - Xi and X2 represent, independently, an oxygen atom O, a sulfur atom S or an NH group;

[0111] - Yiet Y2 represent, independently, a divalent organic radical chosen from a saturated aliphatic group in C36 at Ci or an aromatic or alkylaromatic group in C6 to C24, the aliphatic or aromatic group optionally comprising one or more non-pending heteroatoms, such as nitrogen atom, oxygen atom, sulfur atom, or combinations thereof;

[0112] - Zi and Z2 represent, independently, a reactive terminal group or a group inert terminal;

[0113] - as an inert terminal group, Zi and Z2 can represent, independently, a saturated aliphatic group, linear or branched or cyclic, in the C1 to C50 range, or an aromatic group in the C6 to C8 range, said aliphatic and aromatic groups possibly comprising from 1 to 10 heteroatoms selected from nitrogen, oxygen, sulfur and their combinations, and the aliphatic or aromatic group may be partially or totally fluorinated; in this variant, Zi and Z2 comprise a CG linking group connecting Zi to Yi and Z2 to Y2, the CG group being a single covalent bond, a saturated CC bond, an unsaturated covalent CC bond, an amide group, an ester group, a carbonate group, a thioester group, an ether group, a urethane group, a thiourethane group or a urea group;

[0114] - as a reactive terminal group, Zi and Z2 can be chosen from the alkoxysilyl, hydroxysilyl, acetoxysilyl, vinylsilyl, acrylalkylsilyl, methacrylalkylsilyl, crotonylalkylsilyl, carboxyanhydridoalkylsilyl, carboxyalkylsilyl, hydroxyalkylsilyl, aldehydoalkylsilyl, mercaptoalkylsilyl, norbomenylsilyl, acylpentadienylalkylsilyl, maleimidoalkylsilyl, sulfonylalkylsilyl, (meth)acrylalkyl, crotonylalkyl, alkyl epoxide groups such as propyl epoxide or butyl epoxide and azacyclopropane;

[0115] - Q represents an organopolymer or an organo-oligomer comprising units repetitive saturated aliphatic groups, linear or branched or cyclic, or aromatic groups or alkylaromatic groups, coupled by repetitive carbonate, ester, ether, amide, urethane or urea bonds or their combinations;

[0116] - A represents a divalent aliphatic, aromatic, alkylaromatic or linear, saturated, branched or cyclic having from 2 to 30 carbon atoms, optionally including one or more non-pending heteroatoms, such as nitrogen atom, oxygen atom, sulfur atom, or combinations thereof, in the aliphatic chain or aromatic chain;

[0117] - r denotes an integer equal to 0 or 1;

[0118] - m denotes an integer from 0 to 1000, preferably equal to 0 or 1;

[0119] - m' designates an integer from 0 to 1000, preferably equal to 0 or 1;

[0120] - n denotes an integer from 0 to 1000, preferably equal to 0 or 1, with m+ (m'*n ) > 2.

[0121] Preferably, Zi and Z2 represent, independently, a reactive terminal group, more preferably, Zi and Z2 represent, independently, a group selected from the following groups: alkoxysilyl, hydroxysilyl, acetoxysilyl, vinylsilyl, acrylalkylsilyl, methacrylalkylsilyl, crotonylalkylsilyl, carboxyanhydridoalkylsilyl, carboxyalkylsilyl, hydroxyalkylsilyl, aldehydoalkylsilyl, mercaptoalkylsilyl, norbomenylsilyl, acylpentadienylalk ylsilyl, maleimidoalkylsilyl, sulfonylalkylsilyl, (meth)acrylalkyl, crotonylalkyl, alkyl epoxide such as propyl epoxide or butyl epoxide, and azacyclopropane.

[0122] Such (poly)carbodiimide compounds are, for example, marketed by Stahl BV under the name Permutex XR, or under the name RelcaLinklO., under the name Picassian XL, and Nisshinbo compounds marketed under the name CARBODILITE with the series V-02, V-02-L2, SV-02, E-02, V-10, SW-12G, E-03A, E-04DG-T, E-05, V-04, V-02B, V-04PF, V-05.

[0123] Preferably, the (poly)carbodiimide compound(s) is / are selected from the compounds of the following formula (II): S-.. A \ -5, * \ : z X

[0124] in which:

[0125] - Xi and X2 represent, independently, an oxygen atom O, a sulfur atom S or an NH group;

[0126] - Ri and R2 independently represent a hydrocarbon radical possibly interrupted by one or more heteroatom(s);

[0127] - n and z denote an integer from 1 to 20, with n+z > 2 and w denotes a integer ranging from 1 to 3;

[0128] - Li independently represents a divalent aliphatic hydrocarbon radical in Cr Cig, a C3-Ci5 cycloalkylene radical, a C3-Ci2 heterocycloalkylene group, or a C6-Ci4 arylene group, and mixtures thereof;

[0129] - E independently represents a grouping chosen from:

[0130] - -O-R3-O-; -S-R4-S-; -R5-N(R6)-R4-N(R6)-R5-,

[0131] wherein R3 and R4 independently represent a divalent hydrocarbon radical possibly interrupted by one or more heteroatom(s);

[0132] - R5 independently represents a covalent bond or a hydrocarbon radical saturated divalent, possibly interrupted by one or more heteroatom(s);

[0133] - R6 independently represents a hydrogen atom, or a hydrocarbon radical possibly interrupted by one or more heteroatom(s).

[0134] The term “hydrocarbon radical” means a saturated or unsaturated, linear or branched radical having from 1 to 300 carbon atoms, preferably from 1 to 250 atoms of carbon, more preferably from 1 to 200 carbon atoms. Preferably, the hydrocarbon radical is a linear and saturated radical.

[0135] The hydrocarbon radical may comprise one or more cyclic groups.

[0136] The hydrocarbon radical may be interrupted by one or more heteroatom(s), in particular chosen from O, S or N and / or substituted by one or more cation(s), anion(s), or zwitterion(s) or cationic group(s) such as ammonium, anionic group(s) such as carboxylate, or zwitterionic group(s), and / or comprising a metal ion which may be incorporated in the form of a salt.

[0137] The term "heteroatom(s)" means an oxygen atom O, a sulfur atom S or a nitrogen atom N, as well as halogen atoms such as Cl, F, Br and I. If the heteroatom is included in the chain of the hydrocarbon radical, the heteroatom is preferably chosen from among the oxygen atoms O, sulfur atoms S or nitrogen atoms N.

[0138] Preferably, Xi and X2 independently represent an oxygen atom.

[0139] Preferably, Ri and R2 are chosen independently from dialkylaminoalcohols, alkyl esters of hydroxycarboxylic acid and monoalkyl ethers of (poly)alkylene glycol, in which a hydroxy group has been removed, and mixtures thereof.

[0140] According to a preferred embodiment, Ri and R2 are chosen independently from the following groupings (i) to (iv):

[0141] (i) the compound of the following formula (III):

[0142] R7-OC(O)-C(R8)(H)-(III),

[0143] wherein R7 represents a Ci-C3 alkyl group, and R8 represents a hydrogen atom or a Ci-C3 alkyl group, preferably R7 is a methyl and R8 is a hydrogen atom or a methyl.

[0144] (ii) the compound of the following formula (IV):

[0145] R9-[0-CH2-C(H)(Rio)]p-(IV),

[0146] wherein R9 represents a Ci-C4 alkyl group, Rio represents a hydrogen atom or a Ci-C4 alkyl group and p denotes an integer from 1 to 3; preferably, R9 is a methyl, ethyl or butyl and R10 is a hydrogen atom or a methyl and p is equal to 1.

[0147] (iii) the compound of the following formula (V):

[0148] (Rh)2N-CH2-C(H)(Ri2)- (V),

[0149] wherein Ru represents a Ci-C4 alkyl group and R[2 represents a hydrogen atom or a CrC4 alkyl group; preferably Ru is a methyl, ethyl or butyl and R[2 is a hydrogen atom or a methyl.

[0150] (iv) the compound of the following formula (VI):

[0151] R13-[O-CH2-C(H)(R14)]q- (VI),

[0152] wherein Rn represents a C1-C4 alkyl group or a phenyl, RM represents a hydrogen atom or a C1-C4 alkyl group and q denotes an integer from 4 to 30; preferably Rn is a methyl, ethyl or butyl and Ru is a hydrogen atom or a methyl.

[0153] Preferably, Ri and R2 independently represent a compound of formula (VI) in which Rn represents a C1-C4 alkyl group or a phenyl, preferably a C1-C4 alkyl group, more preferably a methyl, R14 represents a hydrogen atom or a C1-C4 alkyl group, preferably a hydrogen atom and q denotes an integer from 4 to 30.

[0154] According to an alternative embodiment, Ri and R2 are different and one of the radicals Ri or R2 represents a compound of formula (IV) as described above and the other radical Ri or R2 represents a compound of formula (VI) as described above.

[0155] Preferably, in formula (IV), R9 is a methyl, ethyl or butyl and R10 is a hydrogen atom or a methyl and p is equal to 1.

[0156] Preferably, in formula (VI), Rb is a methyl, ethyl or butyl and R[4 is a hydrogen atom or a methyl and q denotes an integer from 4 to 30.

[0157] According to another alternative embodiment, Ri and R2 are identical and represent a compound of formula (VI) in which Rn represents a CrC4 alkyl group or a phenyl, preferably a C1-C4 alkyl group, more preferably a methyl, RM represents a hydrogen atom or a C1-C4 alkyl group, preferably a hydrogen atom and q denotes an integer from 4 to 30.

[0158] Preferably, n denotes an integer from 1 to 20, more preferably from 2 to 20.

[0159] Preferably, z denotes an integer from 1 to 20, more preferably from 2 to 20.

[0160] Preferably, w is equal to 1.

[0161] Preferably, w is equal to 1, n+z denotes an integer from 4 to 10.

[0162] Preferably, Li is chosen from a divalent aliphatic hydrocarbon radical in Ci -Ci8 such as methylene, ethylene, and propylene, a C3-C15 cycloalkylene radical such as cyclopentylene, cycloheptylene, and cyclohexylene, a C3-Ci2 heterocycloalkylene group such as imidazolene, pyrrolene, and furanylene, or a C6-Ci4 arylene group such as phenylene, and mixtures thereof.

[0163] For example, Li can be selected from a radical derived from tolylene diisocyanate, hexamethylene diisocyanate, xylylene diisocyanate, 2,2,4-trimethylhexamethyl diisocyanate, 1,12-diisocyanate dodecane, norbornane diisocyanate, 2,4-bis-(8-isocyanateoctyl)-1,3-dioctylcyclobutane, 4,4'-dicylclohexylmethane diisocyanate, tetramethylxylylene diisocyanate, isophorone diisocyanate, the

[0164] 1,5-naphthylene diisocyanate, 4,4'-diphenylmethane diisocyanate, 4,4'-diphenyldimethylmethane diisocyanate and phenylene diisocyanate and mixtures thereof. Preferably, Li is chosen from a C3-Ci5 cycloalkylene radical, or a C6-Ci4 arylene group and mixtures thereof, such as the compounds of the following formula (VII):

[0165]

[0166] Preferably, L1 is the 4,4-dicyclohexylene methane corresponding to the following formula (VIII): , (VIII). According to another embodiment, when L1 is an arylene group in C6-Ci4, Li is not the m-tetramethylxylylene radical represented by the following formula (IX): (IX).

[0167]

[0168]

[0169] As previously stated, E independently represents a grouping chosen from: - -O-R3-O-; -S-IC-S-; -R5-N(R6)-R4-N(R6)-R5-; in which R3 and R4 independently represent a divalent hydrocarbon radical possibly interrupted by one or more heteroatom(s);

[0170] - R5 independently represents a covalent bond or a hydrocarbon radical saturated divalent, possibly interrupted by one or more heteroatom(s); and

[0171] - R6 independently represents a hydrogen atom, or a hydrocarbon radical possibly interrupted by one or more heteroatom(s).

[0172] Preferably, R3 and R4 are chosen independently from a C6-Cm arylene radical such as phenylene, a C3-C12 cycloalkylene radical such as cyclopropylene and cyclobutylene, a linear or CrCi8 branched alkylene radical such as methylene and ethylene, optionally interrupted by one or more heteroatom(s) and mixtures thereof.

[0173] More preferably, R3 and R4 are chosen independently from a linear or Ci-Ci8 branched alkylene radical such as methylene, butylene, propylene, ethylene, optionally interrupted by one or more heteroatom(s).

[0174] Preferably, when R5 is not a covalent bond, R5 is selected from a C6-Ci4 arylene radical such as phenylene, a C3-Ci2 cycloalkylene radical such as cyclopropylene and cyclobutylene, a linear or branched Ci-Ci8 alkylene radical such as methylene and ethylene, optionally interrupted by one or more heteroatom(s), and mixtures thereof.

[0175] Preferably, R6 is selected from a C6-Ci4 arylene radical such as phenylene, a C3-Ci2 cycloalkylene radical such as cyclopropylene and cyclobutylene, a linear or branched Ci-Ci8 alkylene radical such as methylene and ethylene, optionally interrupted by one or more heteroatom(s), and mixtures thereof.

[0176] Preferably, E represents an -O-R3-O- group in which R3 is selected from a C6-Ci4 arylene radical, a C3-Ci2 cycloalkylene radical, a linear or branched Ci-Ci8 alkylene radical, optionally interrupted by one or more heteroatom(s), and mixtures thereof.

[0177] More preferably, E represents a -O-R3-O- group in which R3 represents a linear or Ci-Ci8 branched alkylene radical such as methylene, butylene, propylene, ethylene, optionally interrupted by one or more heteroatom(s).

[0178] According to a particular embodiment, the (poly)carbodiimide compound is a copolymer derived from alpha-methylstyryl-isocyanates of the following formula (X): (X),

[0179]

[0180]

[0181]

[0182]

[0183]

[0184]

[0185]

[0186]

[0187]

[0188]

[0189] in which R independently represents an alkyl group having from 1 to 24 carbon atoms, a cycloalkyl group having from 3 to 24 carbon atoms, or an aryl group having from 6 to 24 carbon atoms, and, n denotes an integer ranging from 2 to 100. In this embodiment, the term "alkyl group" is as defined previously. In this embodiment, the term "cycloalkyl group" is as defined previously. In this embodiment, n can denote an integer from 2 to 50, preferably from 3 to 30, more preferably from 5 to 10. According to another particular embodiment, the (poly)carbodiimide compound is a compound of the following formula (XI): (XI), in which R independently represents an alkyl group having from 1 to 24 carbon atoms, a cycloalkyl group having from 3 to 24 carbon atoms, or an aryl group having from 6 to 24 carbon atoms. The "alkyl group", the "cycloalkyl group" and the "aryl group" are as defined previously. According to a preferred embodiment, the (poly)carbodiimide compound is chosen from compounds of formula (I) or formula (II) in which: - Xi and X2 independently represent an oxygen atom; - Ri and R2 are chosen independently from dialkylaminoalcohols, alkyl esters of hydroxycarboxylic acid and monoalkyl ethers of (poly)alkylene glycol, in which a hydroxy group has been removed, and mixtures thereof, preferably from monoalkyl ethers of (poly)alkylene glycol, in which a hydroxy group has been removed, more preferably, the compound of formula (VI) as previously described in which Rn represents a C1-C4 alkyl group or a phenyl, preferably a C1-C4 alkyl group, more preferably a methyl, RM represents a hydrogen atom or a C1-C4 alkyl group, preferably a hydrogen atom and q denotes an integer from 4 to 30;

[0190] - n and z, when present, denote an integer from 1 to 20, with n +z > 2 and w is equal to 1;

[0191] - Lb, when present, is chosen from an aliphatic hydrocarbon radical divalent in CrCi8, a cycloalkylene radical in C3-Ci5, a heterocycloalkylene group in C3-C12, or an arylene group in C6-Ci4, and mixtures thereof, preferably a cycloalkylene radical in C3-Ci5;

[0192] - A, when present, is chosen from an aliphatic hydrocarbon radical divalent in CrCi8, a cycloalkylene radical in C3-Ci5, a heterocycloalkylene group in C3-Ci2, or an arylene group in C6-Ci4, and mixtures thereof, preferably a cycloalkylene radical in C3-Ci5;

[0193] - E, when present, independently represents a grouping chosen from:

[0194] - -O-R3-O-; -S-R4-S-; -R5-N(R6)-R4-N(R6)-R5-;

[0195] wherein R3 and R4 are independently selected from a C6-Ci4 arylene radical, a C3-Ci2 cycloalkylene radical, a linear or branched Ci-Ci8 alkylene radical, optionally interrupted by one or more heteroatom(s), and mixtures thereof;

[0196] - when R5 is not a covalent bond, R5, when present, is chosen including a C6-Ci4 arylene radical, a C3-Ci2 cycloalkylene radical, a linear or branched Ci-Ci8 alkylene radical, possibly interrupted by one or more heteroatoms, and mixtures thereof; and

[0197] - R6, when present, is chosen from a C6-Ci4 arylene radical, a cycloalkylene radical in C3-Ci2, a linear or branched alkylene radical in Ci-Ci8, possibly interrupted by one or more heteroatom(s), and mixtures thereof.

[0198] Preferably, the (poly)carbodiimide compound is chosen from compounds of formula (II) in which:

[0199] - Xi and X2 independently represent an oxygen atom;

[0200] - Ri and R2 are chosen independently from among the dialkylaminoalcohols, the alkyl esters of hydroxycarboxylic acid and monoalkyl ethers of (poly)alkylene glycol, in which a hydroxy group has been removed, and mixtures thereof;

[0201] - n and z denote an integer from 1 to 20, with n+z > 2 and w is equal to 1;

[0202] - Li is chosen from a divalent aliphatic hydrocarbon radical in CrCi8, a cycloalkylene radical at C3-Ci5, a heterocycloalkylene group at C3-Ci2, or an arylene group at C6-Ci4, and mixtures thereof;

[0203] - E independently represents a grouping chosen from:

[0204] - -O-R3-O-; -S-R4-S-; -R5-N(R6)-R4-N(R6)-R5-;

[0205] wherein R3 and R4 are independently selected from a C6-Ci4 arylene radical, a C3-Ci2 cycloalkylene radical, a linear or branched CrCi8 alkylene radical, optionally interrupted by one or more heteroatom(s), and mixtures thereof;

[0206] - when R5 is not a covalent bond, R5 is chosen from an arylene radical in C6-Ci4, a C3-Ci2 cycloalkylene radical, a linear or branched Ci-Ci8 alkylene radical, possibly interrupted by one or more heteroatoms, and mixtures thereof; and

[0207] - R6 is chosen from a C6-Ci4 arylene radical, a C3-Ci2 cycloalkylene radical, a linear or branched CrCi8 alkylene radical, possibly interrupted by one or more heteroatom(s), and mixtures thereof.

[0208] More preferably, the (poly)carbodiimide compound is chosen from compounds of formula (II) in which:

[0209] - Xi and X2 independently represent an oxygen atom;

[0210] - Ri and R2, are independently of (poly)alkylene glycol monoalkyl ethers, in which a hydroxy group has been removed;

[0211] - n and z denote an integer from 1 to 20, with n+z > 2 and w is equal to 1;

[0212] - Li is a C3-Ci5 cycloalkylene radical;

[0213] - E independently represents a grouping chosen from:

[0214] - -O-R3-O-; -S-R4-S-; -R5-N(R6)-R4-N(R6)-R5-;

[0215] wherein R3 and R4 are independently selected from a C6-Ci4 arylene radical, a C3-Ci2 cycloalkylene radical, a linear or branched Ci-Ci8 alkylene radical, optionally interrupted by one or more heteroatom(s), and mixtures thereof;

[0216] - when R5 is not a covalent bond, R5 is chosen from an arylene radical in C6-Ci4, a C3-Ci2 cycloalkylene radical, a linear or branched Ci-Ci8 alkylene radical, possibly interrupted by one or more heteroatoms, and mixtures thereof; and

[0217] - R6 is selected from a C6-Ci4 arylene radical, a C3-Ci2 cycloalkylene radical, a linear or branched Ci-Ci8 alkylene radical, possibly interrupted by one or more heteroatom(s), and mixtures thereof.

[0218] Even more preferably, the (poly)carbodihnide compound is chosen from compounds of formula (II) in which:

[0219] - Xi and X2 independently represent an oxygen atom;

[0220] - Ri and R2, independently represent the compound of the following formula (VI):

[0221] R13-[O-CH2-C(H)(R14)]q- (VI),

[0222] in which R13 represents a Ci-C4 alkyl group or a phenyl, preferably a CrC4 alkyl group, more preferably a methyl, R[4 represents a hydrogen atom or a CrC4 alkyl group, preferably a hydrogen atom and q denotes an integer from 4 to 30;

[0223] - n and z denote an integer from 1 to 20, with n+z ranging from 4 to 10 and w is equal to 1;

[0224] - Li is a C3-Ci5 cycloalkylene radical such as cyclopentylene, the cycloheptylene, cyclohexylene, and 4,4-dicyclohexylene methane; and

[0225] - E represents a grouping -O-R3-O- in which R3 is chosen from a radical arylene in C6-Ci4, a cycloalkylene radical in C3-Ci2, a linear or branched alkylene radical in Ci-Ci8, possibly interrupted by one or more heteroatom(s), and mixtures thereof.

[0226] Even more preferably, the (poly)carbodiimide compound is chosen from compounds of formula (II) in which:

[0227] - Xi and X2 independently represent an oxygen atom;

[0228] - Ri and R2, independently represent the compound of the following formula (VI):

[0229] R13-[O-CH2-C(H)(R14)]q- (VI)

[0230] in which R13 represents a CrC4 alkyl group or a phenyl, preferably a CrC4 alkyl group, more preferably a methyl, R[4 represents a hydrogen atom or a CrC4 alkyl group, preferably a hydrogen atom and q denotes an integer from 4 to 30;

[0231] - n and z denote an integer from 1 to 20, with n+z ranging from 4 to 10 and w is equal to 1;

[0232] - Li is a C3-Ci5 cycloalkylene radical such as cyclopentylene, the cycloheptylene, cyclohexylene, 4,4-dicyclohexylene methane, preferably 4,4-dicyclohexylene methane; and

[0233] - E represents a group- -O-R3-O- in which R3 represents a radical linear or CrCi8 branched alkylene such as methylene, propylene, butylene ethylene, possibly interrupted by one or more heteroatom(s).

[0234] According to a preferred embodiment, the (poly)carbodiimide compound is a compound of the following formula (XII):

[0235] in which L1 is 4,4-dicyclohexylene methane, n and z denote an integer from 1 to 20, with n+z ranging from 4 to 10, E represents an -O-R3-O- group in which R3 represents a linear or Ci-Ci8 branched alkylene radical such as methylene, propylene, butylene ethylene, optionally interrupted by one or more heteroatom(s), and r and s denote an integer from 4 to 30.

[0236] Advantageously, the (poly)carbodiimide compound(s) as defined above are present in a total content ranging from 0.01 to 20% by weight, preferably from 0.1 to 15% by weight, more preferably from 0.2 to 10% by weight, even more preferably from 0.5 to 8% by weight, better from 1 to 6% by weight relative to the total weight of composition T.

[0237] Polymer comprising at least one reactive group selected from carboxylic acids

[0238] The composition T used in the process according to the invention comprises at least one polymer comprising at least one reactive group selected from carboxylic acids, preferably at least one acrylic polymer.

[0239] Preferably, the acrylic polymer(s) are in the form of aqueous dispersions of acrylic polymer particles, more preferably in the form of aqueous dispersions of film-forming acrylic polymer particles.

[0240] Thus, preferably, composition T comprises at least one acrylic polymer in the form of aqueous dispersions of acrylic polymer particles.

[0241] The dispersion(s) may be simple dispersions in the aqueous medium of the cosmetic composition. Latexes are a particular example of a dispersion.

[0242] For the purposes of this invention, "polymer" means a compound consisting of the repetition of one or more motifs (these motifs being derived from compounds called monomers). This motif or these motifs are repeated at least twice and preferably at least three times.

[0243] By "film-forming polymer" is meant a polymer capable of forming, alone or in the presence of an auxiliary film-forming agent, a macroscopically continuous film on a substrate, in particular on hair, and preferably a cohesive film

[0244] For the purposes of this invention, "acrylic polymer" means a polymer synthesized from at least one monomer selected from (meth)acrylic acid and / or (meth)acrylic acid ester and / or (meth)acrylic acid amide.

[0245] The motif(s) derived from the (meth)acrylic acid monomers of the polymer may (may) possibly be in the form of salt(s), in particular of alkali metal, alkaline earth metal, ammonium or organic base.

[0246] Esters of (meth)acrylic acid (also called (meth)acrylates) are advantageously chosen from among alkyl (meth)acrylates, in particular alkyl acrylates in C1 to C30, preferably in C1 to C20, better in C1 to Cm, aryl (meth)acrylates, in particular aryl acrylates in C6 to C10, hydroxyalkyl (meth)acrylates, in particular hydroxyalkyl acrylates in C2 to C6.

[0247] Among the alkyl (meth)acrylates, we can mention methyl (meth)acrylate, ethyl (meth)acrylate, butyl (meth)acrylate, isobutyl (meth)acrylate, ethyl-2 hexyl (meth)acrylate, lauryl (meth)acrylate, cyclohexyl (meth)acrylate.

[0248] Among the hydroxyalkyl (meth)acrylates, we can mention hydroxyethyl acrylate, 2-hydroxypropyl acrylate, hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate.

[0249] Among the aryl (meth)acrylates, benzyl acrylate and phenyl acrylate can be cited.

[0250] Particularly preferred esters of (meth)acrylic acid are the Alkyl (meth)acrylates, preferably alkyl in C1 to C30, more preferably in C1 to C20, even better in C1 to C10, and even more particularly in C1 to C4.

[0251] According to the present invention, the alkyl group of the esters can be fluorinated, or even perfluorinated, that is to say that part or all of the hydrogen atoms of the alkyl group are substituted by fluorine atoms.

[0252] Examples of (meth)acrylic acid amides include (meth)acrylamides, as well as N-alkyl (meth)acrylamides, particularly alkyl groups in C2 to C12. Examples of N-alkyl (meth)acrylamides include N-ethyl acrylamide, Nt-butyl acrylamide, Nt-octyl acrylamide, and N-undecylacrylamide.

[0253] The acrylic polymer according to the invention can be a homopolymer or a copolymer, advantageously a copolymer, even better a copolymer of (meth)acrylic acid and (meth)acrylic acid esters.

[0254] Preferably, the acrylic polymer(s) according to the invention comprise one or more motifs derived from the following monomers:

[0255] a) (meth)acrylic acid; and

[0256] b) alkyl (meth)acrylate in C1 to C30, more preferably in C1 to C20, even better in C1 to C10, and even more particularly in C1 to C4.

[0257] Preferably, the aqueous dispersion of acrylic polymer particles does not include a surfactant. The term "surfactant" means any agent capable of modifying the surface tension between two surfaces.

[0258] Among the acrylic polymers according to the invention, we can mention the copolymers of (meth)acrylic acid and methyl or ethyl (meth)acrylate, in particular the copolymers of methacrylic acid and ethyl acrylate such as the compound sold under the trade name LUVIMER MAE by BASF, or the Polyacrylate-2 crosspolymer compound sold under the trade name FIXATE SUPERHOLD POLYMER by LUBRIZOL, or the Acrylate Copolymer compound sold under the trade name DAITOSOL 3000VP3 by DAITO KASEI KOGYO, or the Acrylate Copolymer compound sold under the trade name DAITOSOL 3000SLPN-PE1 by DAITO KASEI KOGYO.

[0259] The acrylic polymer may optionally comprise one or more additional monomers, other than the (meth)acrylic acid and / or (meth)acrylic acid ester and / or (meth)acrylic acid amide monomers.

[0260] As an additional monomer, examples include styrenic monomers, in particular styrene and alpha-methylstyrene, and preferably styrene.

[0261] In particular, the acrylic polymer may be a styrene / (meth)acrylate copolymer, and in particular a polymer selected from copolymers resulting from the polymerization of at least one styrenic monomer and at least one alkyl (meth)acrylate monomer in C1 to C20, preferably in C1 to C10.

[0262] The alkyl (meth)acrylate monomer in C1 to C10 can be selected from methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, hexyl acrylate, octyl acrylate, 2-ethyl hexyl acrylate.

[0263] As an acrylic polymer, we can cite the styrene / (meth)acrylate(s) copolymers marketed under the name JONCRYL 77 by BASF, under the name YODOSOL GH41F by AKZO NOBEL and under the name SYNTRAN 5760 CG by INTERPOLYMER.

[0264] Preferably, composition T comprises at least one aqueous dispersion of acrylic polymer particles. More preferably, composition T comprises at least one aqueous dispersion of acrylic polymer particles comprising one or more motifs derived from the following monomers:

[0265] a) (meth)acrylic acid; and

[0266] b) alkyl (meth)acrylate in C30 Ci, preferably in C20 Ci, more preferably in C10 Ci, and even more particularly in C4 Ci.

[0267] Preferably, the aqueous dispersion of acrylic polymer particles has an acrylic polymer(s) (or active material, or dry matter) content on the basis of the weight of the dispersion of 20 to 60% by weight, more preferably of 22 to 55% by weight and even better of 25 to 50% by weight.

[0268] Advantageously, the total content of the polymer(s) comprising at least one reactive group selected from carboxylic acids ranges from 0.1 to 35% by weight, more preferably from 0.5 to 30% by weight, better still from 1 to 20% by weight, and even more preferably from 3 to 15% by weight relative to the total weight of composition T.

[0269] Advantageously, the total content of the acrylic polymer(s) ranges from 0.1 to 35% by weight, more preferably from 0.5 to 30% by weight, better still from 1 to 20% by weight, and even more preferably from 3 to 15% by weight relative to the total weight of composition T.

[0270] According to a particular embodiment, the total content of the aqueous dispersion(s) of acrylic polymer particle(s) preferably ranges from 0.1 to 35% by weight, more preferably from 0.5 to 30% by weight, better still from 1 to 20% by weight, and even more preferably from 3 to 15% by weight relative to the total weight of composition T. Silicone

[0271] Composition T according to the invention optionally comprises at least one silicone.

[0272] Preferably, the composition T according to the invention comprises at least one silicone selected from non-amine silicones, amino silicones and their mixtures.

[0273] The silicones that may be used may be soluble or insoluble in the composition according to the invention; they may be in the form of oil, wax, resin or gum; silicone oils and gums are preferred.

[0274] Silicones are described in detail in particular in Walter NOLL's book "Chemistry and Technology of Silicones" (1968), Academy Press.

[0275] Volatile silicones can be selected from those possessing a boiling point between 60 and 260°C (at atmospheric pressure), particularly among:

[0276] i) cyclic polydialkylsiloxanes comprising 3 to 7 silicon atoms, preferably 4 to 5, such as

[0277] - octamethylcyclotetrasiloxane and decamethylcyclopentasiloxane.

[0278] Examples include products marketed under the name "VOLATILE SILICONE 7207" by UNION CARBIDE or "SILBIONE 70045 V 2" by RHODIA, "VOLATILE SILICONE 7158" by UNION CARBIDE, "SILBIONE 70045 V 5" by RHODIA.

[0279] - dimethylsiloxane / methylalkylsiloxane type cyclocopolymers with structure chemical: ।— D — D '---------D — D ' —i CH. 21 CH, 1 ■ . . 1. ■ with D: C! with D . -p û CH, CsH57

[0280] One example is "VOLATILE SILICONE FZ 3109" marketed by the company UNION CARBIDE.

[0281] - mixtures of cyclic silicones with organic compounds silicon derivatives, such as the mixture of octamethylcyclotetrasiloxane and tetratrimethylsilylpentaerythritol (50 / 50) and the mixture of octamethylcyclotetrasiloxane and oxy-l,l'-(hexa-2,2,2',2',3,3'-trimethylsilyloxy) bis-neopentane;

[0282] ii) linear polydialkylsiloxanes having 2 to 9 silicon atoms, which generally have a viscosity less than or equal to 5.106 m2 / s at 25°C, such as decamethyltetrasiloxane.

[0283] Other silicones falling within this class are described in the article published in Cosmetics and toiletries, Vol. 91, Jan. 76, p. 27-32 - TODD & BYERS "Volatile Silicone fluids for cosmetics"; one can cite the product marketed under the name "SH 200" by the company TORAY SILICONE.

[0284] Among non-volatile silicones, one can cite, alone or in mixtures, polydialkylsiloxanes and in particular polydimethylsiloxanes (PDMS), polydiarylsiloxanes, polyalkylarylsiloxanes, silicone gums and resins, as well as organopolysiloxanes (or organomodified polysiloxanes, or organomodified silicones) which are polysiloxanes having in their structure one or more organofunctional groups, generally attached via a hydrocarbon group, and preferably chosen from aryl groups, amino groups, alkoxy groups and polyoxyethylenated, or polyoxypropylenated, groups.

[0285] Organomodified silicones may be polydiarylsiloxanes, in particular polydiphenylsiloxanes, and polyalkylarylsiloxanes functionalized with the organofunctional groups mentioned above. Polyalkylarylsiloxanes are particularly selected from among polydimethyl / methylphenylsiloxanes, linear and / or branched polydimethyl / diphenylsiloxanes.

[0286] Among organomodified silicones, organopolysiloxanes comprising: - polyoxyethylene and / or polyoxypropylene groups possibly containing C6-C24 alkyl groups such as dimethicone copolyols, and in particular those marketed by DOW CORNING under the name DC 1248 or SILWET® L 722, L 7500, L 77, L 711 oils from UNION CARBIDE; or alkyl(C12)-methicone copolyols, and in particular those marketed by DOW CORNING under the name Q2-5200; - substituted or unsubstituted amine groups, in particular C1-C4 aminoalkyl groups; examples include products marketed under the names GP4 Silicone Fluid and GP7100 by GENESEE, or under the names Q2-8220 and DC929 or DC939 by DOW CORNING; - thiol groups, such as the products marketed under the names "GP 72 A" and "GP 71" from GENESEE;

[0287] - alkoxylated groups, such as the product marketed under the name "SILICONE COPOLYMER F-755" by SWS SILICONES and ABIL WAX® 2428, 2434 and 2440 by GOLDSCHMIDT;

[0288] - hydroxylated groups, such as polyorganosiloxanes with functional hydroxyalkyl;

[0289] - acyloxyalkyl groups such as the polyorganosiloxanes described in the US patent-A-4957732.

[0290] - anionic groups of the carboxylic acid type, such as for example described in EP186507, or of the alkyl-carboxylic type such as the product X-22-3701E from the company SHIN-ETSU; or of the 2-hydroxyalkylsulfonate or 2-hydroxyalkylthiosulfate type, such as the products marketed by the company GOLDSCHMIDT under the names "ABIL® S201" and "ABIL® S255". - hydroxyacylamino groups, such as the polyorganosiloxanes described in application EP342834; for example, product Q2-8413 from DOW CORNING.

[0291] Silicones can also be selected from polydialkylsiloxanes, the principal examples of which are polydimethylsiloxanes with trimethylsilyl terminal groups. The following commercial products are examples of these polydialkylsiloxanes:

[0292] - SILBIONE® oils from series 47 and 70 047 or MIRASIL® oils marketed by RHODIA such as, for example, oil 70 047 V 500 000; - oils from the MIRASIL® series marketed by the company RHODIA; - oils from the 200 series of DOW CORNING such as DC200 with a viscosity of 60,000 mm2 / s;

[0293] - VISCASIL® oils from GENERAL ELECTRIC and certain oils from the SF series (SF 96, SF 18) from GENERAL ELECTRIC.

[0294] We can also mention polydimethylsiloxanes with dimethylsilanol terminal groups known as dimethiconol (CTFA), such as the oils in the 48 series from the RHODIA company.

[0295] In this class of polydialkylsiloxanes, we can also mention the products marketed under the names "ABIL WAX® 9800 and 9801" by the company GOLDSCHMIDT which are polydialkyl (C1-C20) siloxanes.

[0296] Products more particularly usable according to the invention are mixtures such as:

[0297] - mixtures formed from a polydimethylsiloxane hydroxylated at the end of chain, or dimethiconol (CTFA) and a cyclic polydimethylsiloxane also called cyclomethicone (CTFA) such as the product Q2-1401 marketed by the DOW CORNING company.

[0298] Polyalkylarylsiloxanes are particularly chosen from among polydimethyl / methylphenylsiloxanes, linear and / or branched polydimethyl / diphenylsiloxanes with viscosities ranging from 1.10-5 to 5.10-2m2 / s at 25°C.

[0299] Among these polyalkylarylsiloxanes, we can mention the products marketed under the following names:

[0300] - SILBIONE® oils from the 70 641 series by RHODIA;

[0301] - the oils of the RHODORSIL® 70 633 and 763 series from RHODIA;

[0302] - DOW CORNING 556 COSMETIC GRAD FLUID oil from DOW CORNING;

[0303] - BAYER's PK series silicones such as product PK20;

[0304] - BAYER's PN and PH series silicones such as PN1000 products and PH1000;

[0305] - certain oils from the SF series of GENERAL ELECTRIC such as SF 1023, SF 1154, SF 1250, SF 1265.

[0306] The silicones that may be used may be amine silicones. An amine silicone is defined as any silicone comprising at least one primary, secondary, tertiary amine or one quaternary ammonium group.

[0307] The average molecular weights of these amino silicones can be measured by Gel Permeation Chromatography (GPC) at room temperature (25°C) in polystyrene equivalents. The columns used are Styragel p-columns. The eluent is THF, and the flow rate is 1 ml / min. 200 µl of a 0.5% by weight silicone solution is injected into the THF. Detection is performed by refractometry and UV measurement.

[0308] Preferably, the amine-based silicone(s) that may be used in the context of the invention are chosen from: a. Polysiloxanes corresponding to formula (A):

[0309] b) Amino silicones conforming to formula (B):

[0310] R'aG3a-Si(OSiG2)n-(OSiGbR'2b)mO-SiG3-a-R'a (B)

[0311] in which:

[0312] - G, identical or different, designates a hydrogen atom, a phenyl group, OH, alkyl in C1-C8, for example methyl, or alkoxy in C1-C8, for example methoxy, - a, same or different, denotes 0 or an integer from 1 to 3, in particular 0,

[0313] - b denotes 0 or 1, in particular 1,

[0314] - m and n are numbers such that the sum (n + m) varies from 1 to 2000, in particular from 50 to 150, n being able to designate a number from 0 to 1999, and in particular from 49 to 149 and m being able to designate a number from 1 to 2000, and in particular from 1 to 10;

[0315] - R', identical or different, denotes a monovalent radical of formula -CqH2qL in where q is a number from 2 to 8, and L is an amine grouping, possibly quantized, chosen from the following groups:

[0316] - N(R")2; -N+(R")3 A; -NR"-QN(R")2 and -NR"-Q-N+(R")3 A,

[0317] wherein R", identical or different, denotes hydrogen, phenyl, benzyl, or a monovalent saturated hydrocarbon radical, for example a Ci-C20 alkyl radical; Q denotes a group of formula CrH2r, linear or branched, r being an integer from 2 to 6, preferably from 2 to 4; and A represents a cosmetically acceptable anion, in particular a halide such as fluoride, chloride, bromide, or iodide.

[0318] Preferably, the amino silicones are selected from the amino silicones of formula (B). Preferably, the amino silicones of formula (B) are selected from the amino silicones corresponding to the following formulas (C), (D), (E), (F), and / or (G).

[0319] Thus, the amino silicones corresponding to formula (B) can be chosen from, alone or in mixtures:

[0320] b-1 / silicones designated "trimethylsilylamodimethicone" corresponding to the formula (C): in which m and n are numbers such that the sum (n + m) varies from 1 to 2000, in particular from 50 to 150, n being able to designate a number from 0 to 1999, and in particular from 49 to 149 and m being able to designate a number from 1 to 2000, and in particular from 1 to 10.

[0321] b-2 / silicones of the following formula (D): in which:

[0322] - m and n are numbers such that the sum (n + m) varies from 1 to 1000, in particular from 50 to 250 and more particularly from 100 to 200; n being able to designate a number from 0 to 999 and in particular from 49 to 249 and more particularly from 125 to 175 and m being able to designate a number from 1 to 1000, in particular from 1 to 10, more particularly from 1 to 5; - Ri, R2, R3, identical or different, represent a hydroxy or alkoxy radical in Cr C4, at least one of the radicals Ri to R3 designating an alkoxy radical.

[0323] Preferably the alkoxy radical is a methoxy radical.

[0324] The hydroxy / alkoxy molar ratio is preferably from 0.2:1 to 0.4:1 and preferably from 0.25:1 to 0.35:1 and more particularly is equal to 0.3:1.

[0325] The average molecular mass by weight (Mw) of these silicones preferably ranges from 2000 to 1,000,000, more particularly from 3500 to 200,000.

[0326] b-3 / the following formula (E) silicones: in which:

[0327] - p and q are numbers such that the sum (p+q) varies from 1 to 1000, in particular from 50 to 350, and more particularly from 150 to 250; p can designate a number from 0 to 999 and in particular from 49 to 349 and more particularly from 159 to 239 and q can designate a number from 1 to 1000, in particular from 1 to 10 and more particularly from 1 to 5; - Rb R2, different, represent a hydroxy or alkoxy radical in Ci-C4, at least one of the radicals Ri or R2 designating an alkoxy radical.

[0328] Preferably the alkoxy radical is a methoxy radical.

[0329] The hydroxy / alkoxy molar ratio generally ranges from 1:0.8 to 1:1.1 and preferably from 1:0.9 to 1:1 and more particularly is equal to 1:0.95.

[0330] The average molecular mass by weight (Mw) of silicone is preferably from 2000 to 200000 and even more particularly from 5000 to 100000 and more particularly from 10000 to 50000.

[0331] Commercial products comprising structural silicones (D) or (E) may include in their composition one or more other amino silicones whose structure is different from formulas (D) or (E).

[0332] A product containing structure (D) amino silicones is offered by the company WACKER under the name BELSIL® ADM 652.

[0333] A product containing structure-amino silicones (E) is offered by WACKER under the name Fluid WR 1300®.

[0334] When these amino silicones are used, a particularly interesting embodiment is their use as an oil-in-water emulsion. The oil-in-water emulsion may comprise one or more surfactants. The surfactants may be of any nature, but preferably cationic and / or nonionic. The average number size of the silicone particles in the emulsion generally ranges from 3 nm to 500 nanometers. Preferably, particularly as amino silicones of formula (E), microemulsions are used with an average particle size ranging from 5 nm to 60 nanometers (inclusive) and more particularly from 10 nm to 50 nanometers (inclusive). Thus, according to the invention, the following can be used: amine silicone microemulsions of formula (E) offered under the names FINISH CT 96 E® or SLM 28020® by the company WACKER.

[0335] b-4 / silicones of the following formula (F): in which:

[0336] - m and n are numbers such that the sum (n + m) varies from 1 to 2000 and in particular from 50 to 150, n can designate a number from 0 to 1999 and in particular from 49 to 149 and m can designate a number from 1 to 2000, and in particular from 1 to 10;

[0337] - A denotes a linear or branched alkylene radical having 4 to 8 carbon atoms and preferably 4 carbon atoms. This radical is preferably linear.

[0338] The average molecular mass by weight (Mw) of these amino silicones preferably ranges from 2000 to 1000000 and even more particularly from 3500 to 200000.

[0339] A silicone meeting this formula is for example DOW CORNING's XIAMETER MEM 8299 EMULSION.

[0340] b-5 / silicones of the following formula (G): in which:

[0341] - m and n are numbers such that the sum (n + m) varies from 1 to 2000 and in particular from 50 to 150, n can designate a number from 0 to 1999 and in particular from 49 to 149 and m can designate a number from 1 to 2000, and in particular from 1 to 10;

[0342] - A denotes a linear or branched alkylene radical having from 4 to 8 carbon atoms and preferably 4 carbon atoms. This radical is preferably branched.

[0343] The average molecular mass by weight (Mw) of these amino silicones preferably ranges from 500 to 1,000,000 and even more particularly from 1,000 to 200,000.

[0344] A silicone meeting this formula is, for example, DOW CORNING's DC2-8566 Amino Fluid.

[0345] c) Amino silicones conforming to formula (H): (HJ in which:

[0346] - R5 represents a monovalent hydrocarbon radical having from 1 to 18 atoms of carbon, and in particular an alkyl radical in CrCi8, or alkenyl in C2-Ci8, for example methyl;

[0347] - R6 represents a divalent hydrocarbon radical, in particular an alkylene radical in C1-C18 or a divalent alkyleneoxy radical in CrCi8, for example in CrC8 linked to Si by a SiC bond;

[0348] - Q is an anion such as a halide ion, in particular chloride or an acid salt organic, in particular acetate;

[0349] - r represents an average statistical value ranging from 2 to 20, in particular from 2 to 8; - s represents an average statistical value ranging from 20 to 200, in particular from 20 to 50.

[0350] Such amino silicones are described in particular in US patent 4,185,087.

[0351] d) quaternary ammonium silicones of formula (I): in which:

[0352] - R7, identical or different, represent a monovalent hydrocarbon radical having from 1 to 18 carbon atoms, and in particular an alkyl radical in CrCi8, an alkenyl radical in C2-Ci8 or a ring comprising 5 or 6 carbon atoms, for example methyl;

[0353] - R6 represents a divalent hydrocarbon radical, in particular an alkylene radical in Ci-Ci8 or a divalent alkyleneoxy radical in Ci-Ci8, for example in Ci-C8 linked to Si by a SiC bond;

[0354] - R8, identical or different, represent a hydrogen atom, a radical monovalent hydrocarbon having from 1 to 18 carbon atoms, and in particular an alkyl radical in Ci-Ci8, an alkenyl radical in C2-Ci8, an -R6-NHCOR7 radical; - X is an anion such as a halide ion, in particular chloride or a salt of organic acid, in particular acetate;

[0355] - r represents an average statistical value ranging from 2 to 200, in particular from 5 to 100.

[0356] These silicones are described for example in application EP-A-0530974.

[0357] e) Amino silicones of formula (J): in which:

[0358] - Ri, R2, R3 and R4, whether identical or different, denote a C1-C4 alkyl radical or a phenyl group,

[0359] - R5 designates a C1-C4 alkyl radical or a hydroxyl group,

[0360] - n is an integer ranging from 1 to 5,

[0361] - m is an integer ranging from 1 to 5, and

[0362] - x is chosen such that the amine index varies from 0.01 to 1 meq / g.

[0363] f) multiblock polyoxyalkylened amine silicones, of type (AB)n, A being a polysiloxane block and B being a polyoxyalkylened block comprising at least one amine group.

[0364] Said silicones are preferably made up of repeating units of the following general formulas:

[0365] [-(SiMe2O)xSiMe2 - R -N(R")- R'-O(C2H4O)a(C3H6O)b -R'-N(H)-R-] or else

[0366] [-(SiMe2O)xSiMe2 - R -N(R")- R' - O(C2H4O)a(C3H6O)b -]

[0367] in which:

[0368] - a is an integer greater than or equal to 1, preferably from 5 to 200, plus particularly ranging from 10 to 100;

[0369] - b is an integer between 0 and 200, preferably from 4 to 100, plus particularly between 5 and 30;

[0370] - x is an integer ranging from 1 to 10000, more particularly from 10 to 5000;

[0371] - R" is a hydrogen atom or a methyl;

[0372] - R, identical or different, represent a divalent hydrocarbon radical in C2-Ci2 linear or branched, possibly containing one or more heteroatoms such as oxygen; preferably, R denotes an ethylene radical, a linear propylene radical or branched, a linear or branched butylene radical, or a CH2CH2CH2OCH2 CH(OH)CH2- radical; preferably R denotes a CH2CH2CH2OCH2CH(OH)CH2 radical - R', identical or different, represent a C2-C12 divalent hydrocarbon radical, linear or branched, possibly comprising one or more heteroatoms such as oxygen; preferably, R' designates an ethylene radical, a linear or branched propylene radical, a linear or branched butylene radical, or a CH2CH2CH2OCH2 CH(OH)CH2- radical; preferably R' designates -CH(CH3)-CH2-.

[0373] The siloxane blocks preferably represent 50 and 95% by moles of the total weight of the silicone, more particularly 70 to 85% by moles.

[0374] The amine content is preferably between 0.02 and 0.5 meq / g of copolymer in a 30% by weight solution in dipropylene glycol, more particularly between 0.05 and 0.2 meq / g.

[0375] The average molecular mass by weight (Mw) of silicone is preferably between 5000 and 1000000, more particularly between 10000 and 200000.

[0376] We can cite in particular the silicones marketed under the names Silsoft A-843 or Silsoft A+ by Momentive.

[0377] g) and their mixtures.

[0378] The silicone(s) are preferably chosen from among the amino silicones, better from the amino silicones of formula (A), (D), (E), (F), (G) above, and their mixtures.

[0379] Advantageously, the total quantity of silicone(s) ranges from 0.1 to 15% by weight, preferably from 0.5 to 10% by weight, more preferably from 1 to 6% by weight relative to the total weight of composition T.

[0380] Advantageously, the total quantity of amino silicones ranges from 0.1 to 15% by weight, preferably from 0.5 to 10% by weight, more preferably from 0.8 to 3% by weight, relative to the total weight of composition T.

[0381] Advantageously, the total quantity of non-amine silicones ranges from 0.1 to 15% by weight, preferably from 0.5 to 10% by weight, more preferably from 1 to 6% by weight relative to the total weight of composition T. Associative polymers

[0382] The composition T used in the process according to the invention may further comprise at least one associative polymer different from the polymer comprising at least one reactive group selected from the carboxylic acids as defined above.

[0383] As mentioned above, "associative polymers" are polymers capable, in an aqueous medium, of reversibly associating with each other or with other molecules.

[0384] Their chemical structure includes more particularly at least one hydrophilic zone and at least one hydrophobic zone.

[0385] By "hydrophobic group" is meant a radical or hydrocarbon chain polymer, saturated or unsaturated, linear or branched, comprising 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.

[0386] The associative polymers may be non-ionic, anionic, cationic, or amphoteric. Preferably, the associative polymer(s) are chosen from among the anionic associative polymers.

[0387] Among the associative anionic polymers, we can cite copolymers comprising among their monomers an α,[3-monoethylenic unsaturation carboxylic acid and an ester of an α,[3-monoethylenic unsaturation carboxylic acid and an oxyalkylated fatty alcohol.

[0388] Preferably these compounds also comprise as a monomer an ester of α,[3-monoethylenic carboxylic acid and Ci-C4 alcohol.

[0389] As an example of this type of compound, we can cite ACULYN 22® sold by the company ROHM and HAAS, which is a methacrylic acid / ethyl acrylate / oxyalkylened stearyl methacrylate terpolymer, as well as ACULYN 88 also sold by the company ROHM and HAAS.

[0390] Preferably, the associative polymer(s), other than polymers comprising at least one reactive group selected from the carboxylic acids previously described, are selected from copolymers comprising among their monomers an α,[3-monoethylenic unsaturated carboxylic acid and an ester of an α,[3-monoethylenic unsaturated carboxylic acid and an oxyalkylated fatty alcohol.

[0391] Advantageously, the total content of the associative polymer(s) other than the polymer(s) comprising at least one reactive group selected from the carboxylic acids as defined above ranges from 0.05 to 15% by weight, preferably from 0.05 to 10% by weight, more preferably from 0.1 to 5% by weight, and even more preferably from 0.1 to 1% by weight relative to the total weight of composition T. Organic solvents

[0392] The composition T used in the process according to the invention may comprise one or more organic solvents.

[0393] Examples of organic solvents include lower C1-C4 alkanols, such as ethanol and isopropanol; polyols and polyol ethers such as 2-Butoxyethanol, 1,2-hexanediol, propylene glycol, pentylene glycol, propylene glycol monomethyl ether, diethylene glycol monoethyl ether and monomethyl ether, as well as aromatic alcohols, including aromatic monoalcohols such as benzyl alcohol, phenoxyethanol, and mixtures thereof.

[0394] Organic solvents may be present in a total content of between 1 and 80% by weight, preferably between 5 and 70% by weight and more preferably between 10 and 65% by weight relative to the total weight of composition T.

[0395] The composition T used in the process according to the invention may be aqueous. The water content may range from 1 to 90% by weight, preferably from 10 to 80% by weight, more preferably from 20 to 75% by weight relative to the total weight of composition T. Additives

[0396] The composition T used in the process according to the invention may contain any adjuvant or additive usually used.

[0397] Among the additives that may be contained in the composition, we can mention reducing agents, softeners, antifoaming agents, moisturizing agents, clays, mineral fillers, peptizers, perfumes, anionic, cationic, non-ionic or amphoteric surfactants, proteins, vitamins, polymers other than the polymers previously described, preservatives, oils, waxes other than silicones and their mixtures.

[0398] Preferably, composition T is free of colouring agent(s) selected from pigments, oxidation colour precursors, direct colourings, and mixtures thereof.

[0399] By the expression "composition devoid of colouring agent(s)" in the present invention, it is understood that said composition comprises less than 0.5% by weight of colouring agent(s) relative to the total weight of the composition, preferably less than 0.1% by weight, more preferably does not comprise any colouring agent (0% by weight).

[0400] In a particularly preferred manner, composition T does not include any colouring agent(s) selected from pigments, oxidation colour precursors, direct colourings, and mixtures thereof.

[0401] The composition T used in the process according to the invention may be in particular in the form of a suspension, dispersion, gel, emulsion, in particular an oil-in-water (O / W) or water-in-oil (W / O) emulsion, or multiple emulsions (W / O / O or polyol / O / O or O / O / O), in the form of a cream, foam, stick, vesicle dispersion, in particular of ionic or non-ionic lipids, bi-phase or multi-phase lotion.

[0402] A person skilled in the art will be able to choose the appropriate dosage form and method of preparation based on their general knowledge, taking into account on the one hand, the nature of the constituents used, in particular their solubility in the support, and on the other hand, the intended application of the composition.

[0403] The above additives may generally be present in quantities of each of them between 0 and 20% by weight, relative to the total weight of composition T. Process

[0404] Before undergoing treatment with composition T, the hair is pre-colored with coloring composition C in step a).

[0405] Hair coloring by application of composition C can be carried out on dry or wet hair, as well as on all types of hair, light or dark, natural or colored, permed, bleached or straightened.

[0406] Hair coloring by application of coloring composition C, is carried out before application to the hair of composition T.

[0407] Preferably, a rinsing, wringing and / or drying step is carried out after applying composition C to the hair. More preferably, a drying step is carried out after applying the coloring composition C to the hair.

[0408] Advantageously, a rinsing step is implemented between step a) and step b).

[0409] The application of composition C to the hair can be carried out by any conventional means, in particular by means of a comb, a brush, a sponge or the fingers.

[0410] The application of composition C to the hair is generally carried out at room temperature (between 15 and 25 °C).

[0411] After application of composition C to the hair, one can wait between 1 minute and 6 hours, in particular between 1 minute and 2 hours, more particularly between 1 minute and 1 hour, more preferably between 1 minute and 45 minutes, before for example a drying step.

[0412] After application of composition C, the hair may be left to dry or dried, for example at a temperature of 30 °C or higher.

[0413] The coloring process can thus include a step of applying heat to the keratin fibers using a heating tool after the application of the C composition.

[0414] The heat application step can be carried out using a helmet, a hair dryer, a straightening or curling iron, a climazon, etc. Preferably, the heat application step is carried out using a hair dryer after the application of composition C.

[0415] When the coloring process involves a step of applying heat to the hair, the step of applying heat to the hair takes place after the application of composition C.

[0416] During the heat application step on the hair, after the application of composition C, a mechanical action on the strands can be exerted such as combing, brushing, passing with fingers.

[0417] When the step of applying heat to the hair, after the application of composition C, is carried out using a helmet or a hair dryer, the temperature is preferably between 30 and 110°C, preferably between 50 and 90°C.

[0418] Preferably, if the hair is dried, it is dried not only with heat but also with an airflow. This airflow during drying helps to improve the individualization of the treated hair.

[0419] In the process according to the invention, composition T is applied in step b) to the hair after the application of composition C.

[0420] One can wait between 30 seconds and 6 hours, in particular between 30 seconds and 2 hours, more particularly between 30 seconds and 1 hour, more preferably between 30 seconds and 30 minutes, after the application of composition T to the hair.

[0421] Preferably, the application time is between 30 seconds and 20 minutes after application of composition T to the hair.

[0422] Preferably, composition T is not rinsed out. Following the application of composition T, a wringing and / or drying step is carried out on the hair. More preferably, a drying step is carried out after the application of composition T to the hair.

[0423] Application to the hair can be carried out by any conventional means, in particular by means of a comb, a brush, a sponge or the fingers.

[0424] The application of composition T to the hair is generally carried out at room temperature (between 15 and 25 °C).

[0425] After application of composition T, the hair may be left to dry or dried, for example at a temperature of 30 °C or higher.

[0426] The process according to the invention can thus include a step of applying heat to the keratin fibers using a heating tool.

[0427] The heat application step of the process of the invention can be carried out using a helmet, a hair dryer, a straightening or curling iron, a climazon, ... Preferably, the heat application step of the process of the invention is carried out using a hair dryer.

[0428] During the heat application step on the hair, a mechanical action on the strands can be exerted such as combing, brushing, passing with fingers.

[0429] When the step of applying heat to the hair is carried out using a helmet or a hair dryer, the temperature is preferably between 30 and 110°C, preferably between 50 and 90°C.

[0430] Preferably, if the hair is dried, it is dried not only with heat but also with an airflow. This airflow during drying helps to improve the individualization of the treated hair.

[0431] Preferably, the invention is a hair coloring process comprising:

[0432] i) the application to the hair of at least one coloring composition C as described above; then

[0433] ii) optionally a step of washing, rinsing or wringing said hair, then

[0434] iii) the application to said hair of at least one composition T as described above; then

[0435] ii) optionally a step of washing, rinsing or wringing said hair.

[0436] According to one embodiment, step a) consists of extemporaneously mixing at the time of use at least one composition C as described above, with at least one chemical oxidizing agent, preferably hydrogen peroxide, to obtain a mixture, and then applying said mixture to the hair.

[0437] According to another embodiment, step a) consists of applying to the hair at least one composition C which contains one or more direct colorants, and optionally an oxidizing agent.

[0438] Preferably, composition T further comprises at least one associative polymer as described above, different from the polymer comprising at least one reactive group selected from carboxylic acids as defined above.

[0439] Advantageously, step b) consists of extemporaneously mixing at least two compositions A and B at the time of use to obtain a hair treatment composition T and applying composition T to the hair with:

[0440] - composition A comprising at least one (poly)carbodiimide compound such that defined previously;

[0441] - composition B comprising at least one polymer comprising at least one reactive group chosen from among the carboxylic acids as defined previously, and

[0442] preferably, composition A and / or composition B being free of colouring agent(s) selected from pigments, direct dyes, oxidation dye precursors, and mixtures thereof.

[0443] According to a preferred embodiment, the process according to the invention is a hair coloring process comprising:

[0444] i) the application to the hair of at least one coloring composition C as described above; then

[0445] ii) a step of washing, rinsing or wringing said hair, then

[0446] iii) a step consisting of extemporaneously mixing at least two compositions A and B at the time of use to obtain a composition T and applying composition T to the hair, with:

[0447] - composition A comprising at least one (poly)carbodiimide compound such that defined previously;

[0448] - composition B comprising at least one polymer comprising at least one reactive group chosen from among the carboxylic acids as defined previously, and

[0449] composition A and / or composition B being devoid of colouring agent(s) selected from pigments, direct dyes, oxidation dye precursors, and mixtures thereof.

[0450] iv) optionally, a step of washing, rinsing, wringing and / or drying said hair.

[0451] Preferably, the polymer comprising at least one reactive group selected from carboxylic acids is selected from acrylic polymers.

[0452] According to this embodiment, compositions A and B are mixed preferably less than 15 minutes before application to the hair, more preferably less than 10 minutes before application, better less than 5 minutes before application.

[0453] The weight ratio between composition A and composition B is preferably from 0.1 to 10, preferably from 0.2 to 5, better from 0.5 to 2, or even from 0.6 to 1.5. In a particular embodiment, the weight ratio between composition A and composition B is equal to 1.

[0454] The total amount of the (poly)carbodiimide compound(s) preferably ranges from 0.01 to 40% by weight, more preferably from 0.1 to 30% by weight, better from 0.5 to 20% by weight, even more preferably from 1 to 15% by weight relative to the total weight of composition A.

[0455] The total quantity of the polymer(s) comprising at least one reactive group selected from the carboxylic acids is preferably from 0.2 to 60% by weight, more preferably from 1 to 50% by weight, better still from 1 to 40% by weight, and even more preferably from 2 to 30% by weight relative to the total weight of composition B.

[0456] According to a particular embodiment, composition B comprises at least one associative polymer as defined above. The total content of the associative polymer(s) preferably ranges from 0.05 to 15% by weight, preferably from 0.05 to 10% by weight, more preferably from 0.1 to 5% by weight, and even more preferably from 0.1 to 1% by weight relative to the total weight of composition B.

[0457] The present invention will now be described more specifically by means of examples, which are in no way limiting to the scope of the invention. However, the examples allow for the support of specific features, variants, and preferred embodiments of the invention. EXAMPLES

[0458] The (poly)carbodiimide(s) of the invention are accessible by synthetic methods known to those skilled in the art, from commercial products or from reagents synthesizable according to chemical reactions also known to those skilled in the art. Examples include the book *Sciences of Synthesis - Houben - Weyl Methods of Molecular Transformations*, 2005, Georg Thiem Verlag Kg, Rudigerstrasse 14, D-70469 Stuttgart, or US patent 4,284,730 or Canadian application CA 2,509,861.

[0459] More particularly, the process for preparing the (poly)carbodiimides of the invention uses in a first step a diisocyanate reagent (1): O=C=N-LrN=C=O (1),

[0460] formula (1) wherein Li is as defined previously which reacts in the presence of a carboimidation catalyst (2) such as those described in US 4,284,730, in particular phosphorus catalysts especially chosen from phospholene oxides and phospholene sulfoxides, diaza and oxazaphospholanes, preferably under an inert atmosphere (nitrogen or Argon), and in particular in a polar solvent preferably aprotic such as THF, glyme, diglyme, 1,4-dioxane, and DMF, at a temperature between room temperature and solvent reflux, preferably around 140 °C; to give the carbodiimide diisocyanate compound (3): O=C=N-L1-(N=C=N-L1)nN=C=O (3),

[0461] formula (3) in which Li and n are as defined previously. Benzoyl halogen such as benzoyl chloride may be added to deactivate the catalyst.

[0462] To obtain "symmetrical" (poly)carbodiimides, in the second step of the preparation process, compound (3) reacts with 1 molar equivalent (1 eq) of nucleophilic reagent Ri-XrH, then 0.5 eq. of HEH reagent with Rb Xi and E as defined above, to give the "symmetrical" compound according to the invention (4): [Ri-XrQOj-NH-L^N^Nd^VNH-QOjh-E (4),

[0463] formula (4) in which Rb Xb Lh n, and E are as defined previously. According to a variant for obtaining compound (4) from (3) it is possible to add first 0.5 eq. of HEH reagent, then 1 eq. of Ri-XrH reagent.

[0464] To obtain "asymmetric" (poly)carbodiimides, in the second step of the preparation process, compound (3) reacts with 1 molar equivalent (1 eq) of nucleophilic reagent Ri-XrH and then 1 eq of HEH reagent with Rb Xi and E as defined above, to give compound (5):

[0465] R1-X1-C(O)-NH-L1-(N=C=N-L1)n-NH-C(O)-EH (5),

[0466] formula (5) in which Rb Xb Lh n, and E are such as defined previously.

[0467] According to one variant for obtaining compound (5) from (3) it is possible to add first 1 eq. of reagent Ri-XrH, then 0.5 eq. of reagent HEH.

[0468] In a third step, compound (5) reacts with 1 eq. of compound (6) R2-X2-C(O)-NH-Li-(N=C=N-Li)zN=C=O (6), said compound (6) is prepared beforehand from compound (3'):

[0469] O=C=N-L1-(N=C=N-L1)ZN=C=O (3'),

[0470] formula (3') in which Li and z are as defined previously which reacts with 1 eq of nucleophilic reagent R2-X2-H with Lb R2, X2, and z as defined previously, to give rise to the asymmetric compound (7):

[0471] R1-X1-C(O)-NH-L1-(N=C=N-L1)n-NH-C(O)-EC(O)-NH-L1--(N=C=N-L1)z-NH- C(O)-X2-R2 (7),

[0472] Formula (7) in which Rb Xb Lb R2, X2, n, z and E are as defined previously.

[0473] It is also possible to react 1 molar equivalent of compound O=C=N-Li-(N=C=N-Li)zN=C=O (3') with 1 / w molar equivalent of HEH, then 1 eq. of nucleophilic reagent R2-X2-H to give compound (8):

[0474] H-[EC(O)-NH-L1-(N=C=N-L1)z]w-NH-C(O)-X2-R2 (8),

[0475] formula (8) in which Lb R2, X2, z and E are as defined previously, and w is an integer from 1 to 3, more preferably w = 1.

[0476] This last compound (8) can then react with 1 eq of compound (4'):

[0477] Ri-Xi-C(O)-NH-Li-(N=C=N-Li)nN=C=O (4'), (said compound (4') can be synthesized by reaction of 0.5 eq. of nucleophilic reagent Ri-XrH with 1 equivalent of compound (3)), to lead to the (poly)carbodihnide of the invention (9):

[0478] R1-X1-C(O)-NH-L1-(N=C=N-L1)n-NH-C(O)-[EC(O)-NH-L1-(N=C=N-L1)z]w-NH C(O)-X2-R2 (9),

[0479] formula (9) in which Lb Rb Xb R2, X2, n, z, w, and E are such as defined previously.

[0480] (Poly)carbodiimide compounds, as well as all reaction intermediates and reactants, can be purified with conventional methods known to those skilled in the art, such as extraction with water and water-immiscible organic solvent, precipitation, centrifugation, filtration, and / or chromatography.

[0481] Example 1: Process for the synthesis of the (poly)carbodiimide compound

[0482] In a 500 mL three-necked flask equipped with a thermometer, a stirrer and a reflux tube, 50 g of dicyclohexylmethane 4,4'-diisocyanate and 0.5 g of 4,5-dihydro-3-methyl-l-phenyl-lH-phosphole 1-oxide were introduced under stirring.

[0483] The reaction medium was heated to 140°C under nitrogen for 4 hours, following the reaction by infrared spectroscopy through the absorption of isocyanate functions between 2200 and 2300 cm1, then cooled to 120°C.

[0484] A mixture of 5.3 g of polyethylene glycol monomethyl ether and 1.2 g of 1,4-butanediol is introduced into the reaction medium while stirring. The temperature of 120°C is maintained until the complete disappearance of the isocyanate groups, monitored by infrared spectroscopy at 2200-2300 cm1, and then cooled to room temperature.

[0485] After cooling to room temperature, the reaction mixture is poured dropwise under vigorous stirring into a 500 mL glass beaker containing 85 g of distilled water to produce the desired product in the form of a translucent yellow liquid. Example 2

[0486] The L'Oréal Paris© Préférence hair color product, shade 6.66, is used in the following examples. Composition CPI corresponds to the colorant gel of this hair color product and contains bases and oxidation couplers. Composition CP2 corresponds to the developer lotion, which contains hydrogen peroxide.

[0487] The CNP composition corresponds to the L'Oréal Professionnel direct coloring product, Nuancelle Blue, which contains violet and blue direct colorants.

[0488] Composition CPI was then mixed with composition CP2 at a mass ratio of 1 / 1.5 to obtain composition CP.

[0489] In addition, compositions T1 and T2 as described below in Tables 1 and 2 were prepared: quantities are expressed in g of raw material as is / 100 g, unless otherwise stated. Thus, quantities can be expressed in g of active substance (a) / 100 g.

[0490] [Tables 1] Composition Tl Polycarbodiimide (1) 17.5 (7 m) Ethanol 20.0 Hydroxyethyl acrylate / Sodium acroyldimethyl taurate co polymer (2) 3.0 (2.7 m) Water Qsp 100

[0491] (1) synthesized according to the synthesis process described in Example 1 (at 40% of material active in water),

[0492] (2) sold by the company SEPPIC under the trade name SEPPINOV EMT10 (with 90% active ingredient).

[0493] [Tables2] Composition T2 Acrylates copolymer (3) 29.2 (8.76 ma) Amodimethicone 8.8 (3.01 ma) Divinyldimethicone / Dimethicone copolymer (and) Cl 2-13 Pareth-3 (and) C12-13 Pareth-23 (4) 10.2 (6.13 ma) Acrylates / Steareth-20 Methacrylate copolymer (5) 2.2 (0.66 ma) Ethanol 3.8 Pentylene glycol 1.9 1,2-Hexanediol 0.8 Triethanolamine 0.5 Water qs 100

[0494] (3) sold by the company DAITO KASEI KOGYO under the trade name DAITOSOL 3000SLPN-PE1 (aqueous dispersion with 30% active ingredient)

[0495] (4) sold by the DOW CORNING company under the name DOW CORNING HMW 2220 NON-IONIC EMULSION (Divinyldimethicone / dimethicone block copolymer in aqueous emulsion) (60% active ingredient)

[0496] (5) sold by the company ROHM and HAAS under the trade name ACULYN 22® (methacrylic acid / ethyl acrylate / oxyalkylated stearyl methacrylate terpolymer with 30% active ingredient)

[0497] Composition T1 was then mixed with composition T2 at a mass ratio of 50 / 50 to obtain composition T.

[0498] The CP, CNP and T compositions are summarized in the following table 3:

[0499] [Tables3] Compositions CP CNP T Mixture of compositions (Weight ratio) CPI + CP2 (1:1.5) CNP T1 + T2 (1:1) Evaluation of shampoo persistence protocol

[0500] Four application methods were used.

[0501] According to process 1, the colorant composition CP was applied using a coloring brush to moderately sensitized hair strands (SA20) at a rate of 5 g of composition per gram of strand. The pre-colored strands were left for 15 minutes on one side and then 15 minutes on the other side on a heated plate at 31°C. The strands were then rinsed with water before being blow-dried. Next, composition T was applied to the strands pre-colored with composition CP at a rate of 0.8 g of composition per gram of strand. The strands treated with composition T were left to air dry for 1 minute and then blow-dried for 1 minute while being brushed.

[0502] According to process 2, the coloring composition CP was applied using a coloring brush to moderately sensitized hair strands (SA20) at a rate of 5 g of composition per gram of strand. The pre-colored strands were left for 15 minutes on one side and then 15 minutes on the other side on a heating plate at 31°C. The strands were then rinsed with water before being dried with a hairdryer.

[0503] Process 1 is a process according to the invention and process 2 is a comparative process. Hereafter, they are referred to as PI and P2.

[0504] According to process 3, the colorant composition CNP was applied using a coloring brush to moderately sensitized hair strands (SA20) at a rate of 5 g of composition per gram of strand. The pre-colored strands were left for 15 minutes on one side and then 15 minutes on the other side on a heated plate at 31°C. The strands were then rinsed with water before being blow-dried. Next, composition T was applied to the strands pre-colored with composition CNP at a rate of 0.8 g of composition per gram of strand. The strands treated with composition T were left to air dry for 1 minute and then brushed for 1 minute.

[0505] According to process 4, the CNP colorant composition was applied using a coloring brush to moderately sensitized hair strands (SA20) at a rate of 5 g of composition per gram of strand. The pre-colored strands were left for 15 minutes on one side and then 15 minutes on the other side on a heated plate at 31°C. The strands were then rinsed with water before being dried with a hairdryer.

[0506] Process 3 is a process according to the invention and process 4 is a comparative process. Hereafter, they are referred to as P3 and P4.

[0507] The processes applied are summarized in Table 4 below:

[0508] [Tables4] Processes for applying the compositions PI (invention) CP + T P2 (comparative) CP P3 (invention) CNP + T P4 (comparative) CNP

[0509] The different strands of hair treated by the PI to P4 processes were then subjected to a test of several repeated shampoos in order to evaluate the tenacity (the persistence) of the color obtained with the shampoos, according to the shampoo protocol described below. Shampoo Protocol#:

[0510] The colored hair strands are combed, moistened under water at 35°C before being passed between the fingers 5 times for 5 seconds. The hair strands are then squeezed dry between two fingers.

[0511] A standard shampoo (Garnier Ultra Doux) is applied evenly to the colored strands at a rate of 0.4g of standard shampoo per gram of strands, gently massaging the strands of hair along their length (6 passes) for 15 seconds, from root to tip.

[0512] The strands of hair are then placed in a watch glass and left to rest for 1 minute.

[0513] Next, the hair strands are rinsed with water by passing the strand between the fingers (15 passes). The hair strands are then squeezed dry between two fingers before the next shampoo.

[0514] Once the tests of several shampoos have been carried out, the strands of hair are combed and blow-dried. Results

[0515] The persistence of the color of the highlights was evaluated in the CIE L*a*b* system, using a Konica Minolta CM3600A spectrophotometer (illuminant D65, angle 10°, specular component included).

[0516] In this L*a*b* system, L* represents the intensity of the color, a* indicates the green / red color axis and b* the blue / yellow color axis.

[0517] The permanence of the color is assessed by the color difference AE between measurements taken on colored strands before shampooing, and then after 5 shampoos according to the protocol described above. The lower the AE value, the more the color persists through shampooing.

[0518] The value of AE is calculated according to the following equation:

[0519] In this equation, L*, a*, b* represent the values ​​measured after hair coloring and after shampooing, and Lo*, a0*, b0* represent the values ​​measured after hair coloring but before shampooing.

[0520] The results are summarized in Table 5 below.

[0521] [Tables5] After coloring After 5 shampoos AE Processes Lo* a0* b0* L* a* b* PI (invention) 26.7 30.7 17.5 28.0 28.7 17.0 2.4 P2 (comparative) 26.0 26.1 12.7 28.7 28.6 16.0 4.9 P3 (invention) 32.2 -1.9 -14.5 35.2 -1.0 -10.1 5.4 P4 (comparative) 30.8 -1.7 -9.6 37.3 -1.2 -3.5 8.9

[0522] Hair strands treated with the PI process according to the invention and washed with five shampoos show improved shampoo retention compared to hair strands treated with the comparative P2 process.

[0523] Similarly, hair strands treated with the P3 process according to the invention and washed with five shampoos show improved shampoo retention compared to hair strands treated with the comparative P4 process.

[0524] Thus, the application of composition T to hair that has undergone prior coloring improves the permanence of said coloring.

Claims

Demands

1. A hair coloring process comprising: a) applying to the hair at least one coloring composition C comprising at least one coloring agent selected from direct dyes, oxidation dye precursors and mixtures thereof, and optionally at least one chemical oxidizing agent; then b) applying at least one composition T comprising: (1) at least one (poly)carbodihnide compound; (2) at least one polymer comprising at least one reactive group selected from carboxylic acids; and (3) optionally at least one silicone.

2. A process according to claim 1, characterized in that the oxidation dye precursor(s) are chosen from oxidation bases, oxidation couplers and mixtures thereof.

3. A process according to claim 2, characterized in that the oxidation bases are selected from para-phenylenediamines, bis(phenyl)alkylenediamines, para-aminophenols, ortho-aminophenols, heterocyclic bases, their corresponding addition salts, their solvates, their salts and mixtures thereof.

4. A process according to claim 2 or 3, characterized in that the oxidation couplers are selected from meta-phenylenediamines, meta-aminophenols, meta-diphenols, naphthalene-based coupling agents and heterocyclic coupling agents, their corresponding addition salts, solvates, salts and mixtures thereof.

5. A method according to any one of the preceding claims, characterized in that the direct dye(s) is / are selected from azo direct dyes; (poly)methine dyes such as cyanines, hemicyanines and styryls; carbonyl dyes; azine dyes; nitro(hetero)aryl dyes; tri(hetero)arylmethane dyes; porphyrin dyes; phthalocyanine dyes, natural direct dyes, and mixtures thereof.

6. A method according to any one of the preceding claims, characterized in that the coloring agent(s) selected from direct dyes, oxidation dye precursors, and their

7. mixtures, is / are present in composition C in a content ranging from 0.001 to 20% by weight, preferably from 0.005 to 15% by weight relative to the total weight of composition C. A process according to any one of the preceding claims, characterized in that the (poly)carbodiimide compound(s) is / are chosen from the compounds of the following formula (I): OO 1 r he 'N—A— A4—N' ......R> HLAH in which: - Xi and X2 represent, independently, an oxygen atom O, a sulfur atom S or an NH group; - Ri and R2 independently represent a group chosen from a hydrocarbon radical, preferably alkyl, possibly interrupted by one or more heteroatoms, a group chosen from the following groups: alkoxysilyl, hydroxysilyl, acetoxysilyl, vinylsilyl, acrylalkylsilyl, methacrylalkylsilyl, crotonylalkylsilyl, carboxyanhydridoalkylsilyl, carboxyalkylsilyl, hydroxyalkylsilyl, aldehydoalkylsilyl, mercaptoalkylsilyl, norbornenylsilyl, acylpentadienylalkylsilyl, maleimidoalkylsilyl, sulfonylmylalkylsilyl, (meth)acrylalkyl, crotonylalkyl, alkyl epoxide such as propyl epoxide or butyl epoxide, and azacyclopropane, and a hydrocarbon radical, preferably alkyl, possibly interrupted by one or more heteroatoms and by one or more groups chosen from the following groups: alkoxysilyl, hydroxysilyl, acetoxysilyl, vinylsilyl, acrylalkylsilyl, methacrylalkylsilyl, crotonylalkylsilyl, carboxyanhydridoalkylsilyl, carboxyalkylsilyl,hydroxyalkylsilyl, aldehyde alkylsilyl, mercaptoalkylsilyl, norbornenylsilyl, acylpentadienylalkylsilyl, maleimidoalkylsilyl, sulfonylmylalkylsilyl, (meth)acrylalkyl, crotonylalkyl, alkyl epoxides such as propyl epoxide or butyl epoxide, and azacyclopropane; - n denotes an integer ranging from 1 to 1000; and - A is a monomer chosen from the compounds below:

8. A process according to any one of claims 1 to 6, characterized in that the (poly)carbodiimide compound(s) is / are chosen from the compounds of the following formula (II): o A. (W' in which - Xi and X2 represent, independently, an oxygen atom O, a sulfur atom S or an NH group; - Ri and R2 independently represent a hydrocarbon radical possibly interrupted by one or more heteroatom(s); - n and z denote an integer from 1 to 20, with n+z > 2 and w denotes an integer from 1 to 3; - Li independently represents a divalent aliphatic hydrocarbon radical in Ci-Ci8, a cycloalkylene radical in C3-C15, a heterocycloalkylene group in C3-C12, or an arylene group in C6-Ci4, and mixtures thereof; - E independently represents a group chosen from: -O-R3-O-; -S-R4-S-; -R5-N(R6)-R4-N(R6)-R5-, in which R3 and R4 independently represent a divalent hydrocarbon radical possibly interrupted by one or more heteroatoms; - R5 independently represents a covalent bond or a divalent saturated hydrocarbon radical, possibly interrupted by one or more heteroatoms; - R6 independently represents a hydrogen atom, or a hydrocarbon radical possibly interrupted by one or more heteroatoms.

9. A process according to claim 8, characterized in that the (poly)carbodiimide compound(s) is / are selected from compounds of formula (II) in which: - Xi and X2 independently represent an oxygen atom; - Ri and R2 are selected independently from dialkylaminoalcohols, alkyl esters of hydroxycarboxylic acid and monoalkyl ethers of (poly)alkylene glycol, in which a hydroxy group has been removed, and mixtures thereof; - n and z denote an integer from 1 to 20, with n+z > 2 and w equals 1; - L1 is selected from a divalent aliphatic hydrocarbon radical in C1-C18, a cycloalkylene radical in C3-Ci5, a heterocycloalkylene group in C3-Ci2, or an arylene group in C6-Ci4, and mixtures thereof; - E independently represents a grouping chosen from: - -O-R3-O-; -S-R4-S-; -R5-N(R6)-R4-N(R6)-R5-;in which R3 and R4 are chosen independently from a C6-Ci4 arylene radical, a C3-Ci2 cycloalkylene radical, a linear or branched CrCi8 alkylene radical, possibly interrupted by one or more heteroatom(s), and mixtures thereof; - when R5 is not a covalent bond, R5 is chosen from a C6-Ci4 arylene radical, a C3-C12 cycloalkylene radical, a linear or branched CrCi8 alkylene radical, possibly interrupted by one or more heteroatom(s), and mixtures thereof; and - R6 is chosen from a C6-Ci4 arylene radical, a C3-C12 cycloalkylene radical, a linear or branched Ci-Ci8 alkylene radical, possibly interrupted by one or more heteroatom(s), and mixtures thereof.

10. A process according to claim 8 or 9, characterized in that the (poly)carbodihnide compound(s) is / are selected from compounds of formula (II) in which: - Xi and X2 independently represent an oxygen atom; - Ri and R2 are independently monoalkyl ethers of (poly)alkylene glycol, in which a hydroxyl group has been removed; - n and z denote an integer from 1 to 20, with n+z > 2 and w is equal to 1; - Li is a C3-C15 cycloalkylene radical; - E independently represents a group selected from: -O-R3-O-; -S-R4-S-; -R5-N(R6)-R4-N(R6)-R5-; in which R3 and R4 are independently chosen from a C6-Ci4 arylene radical, a C3-C12 cycloalkylene radical, a linear or branched CrCi8 alkylene radical, possibly interrupted by one or more heteroatom(s), and mixtures thereof;- when R5 is not a covalent bond, R5 is chosen from a C6-Ci4 arylene radical, a C3-C12 cycloalkylene radical, a linear or branched CrCi8 alkylene radical, possibly interrupted by one or more heteroatoms, and mixtures thereof; and - R6 is chosen from a C6-Ci4 arylene radical, a C3-C12 cycloalkylene radical, a linear or branched Ci-Ci8 alkylene radical, possibly interrupted by one or more heteroatoms, and mixtures thereof.

11. A method according to any one of claims 8 to 10, characterized in that the (poly)carbodiimide compound(s) is / are chosen from compounds of formula (II) in which: - Xi and X2 independently represent an oxygen atom; - Ri and R2 independently represent the compound of the following formula (VI): R13-[O-CH2-C(H)(R14)]q- (VI), in which R13 represents a C1-C4 alkyl group or a phenyl, preferably a Ci-C4 alkyl group, more preferably a methyl, R14 represents a hydrogen atom or a CrC4 alkyl group, preferably a hydrogen atom and q denotes an integer from 4 to 30; - n and z denote an integer from 1 to 20, with n+z ranging from 4 to 10 and w is equal to 1; - Li is a C3-Ci5 cycloalkylene radical such as cyclopentylene, cycloheptylene, cyclohexylene and 4,4-dicyclohexylene methane, and - E represents an -O-R3-O- group in which R3 is selected from a C6-Ci4 arylene radical, a C3-C12 cycloalkylene radical, a linear or branched CrCi8 alkylene radical, possibly interrupted by one or more heteroatom(s), and mixtures thereof.

12. A process according to any one of claims 8 to 11, characterized in that the (poly)carbodiimide compound(s) is / are selected from the compounds of formula (II) in which: - Xi and X2 independently represent an oxygen atom; - Ri and R2 independently represent the compound of the following formula (VI): R13-[O-CH2-C(H)(R14)]q- (VI), in which R[3 represents a Ci-C4 alkyl group or a phenyl group, preferably a CrC4 alkyl group, more preferably a methyl group, Ru represents a hydrogen atom or a Ci-C4 alkyl group, preferably a hydrogen atom, and q denotes an integer from 4 to 30; - n and z denote an integer from 1 to 20, with n+z ranging from 4 to 10, and w is equal to 1; - Li is a C3-Ci5 cycloalkylene radical such as cyclopentylene, cycloheptylene, cyclohexylene and 4,4-dicyclohexylene methane, preferably 4,4-dicyclohexylene methane;and - E represents a group- -O-R3-O- in which R3 represents a linear or CrCi8 branched alkylene radical such as methylene, propylene, butylene, ethylene, possibly interrupted by one or more heteroatom(s).;

13. A process according to any one of claims 8 to 12, characterized in that the (poly)carbodiimide compound(s) is / are selected from the compounds of the following formula (XII): û . A .N" ' ' ' o sV-N'' MHO j ? H rO < IS • (XII), in which Li is 4,4-dicyclohexylene methane, n and z denote an integer from 1 to 20, with n+z ranging from 4 to 10, E represents a -O-R3-O- group in which R3 represents a linear or CrCi8 branched alkylene radical such as methylene, propylene, butylene ethylene, optionally interrupted by one or more heteroatom(s), and r and s denote an integer from 4 to 30.

14. A process according to any one of the preceding claims, characterized in that the total amount of the (poly)carbodiimide compound(s) ranges from 0.01 to 20% by weight, preferably from 0.1 to 15% by weight, more preferably from 0.2 to 10% by weight, even more preferably from 0.5 to 8% by weight, better from 1 to 6% by weight relative to the total weight of composition T.

15. A process according to any one of the preceding claims, characterized in that the polymer comprising at least one reactive group selected from carboxylic acids is an acrylic polymer.

16. A process according to the preceding claim, characterized in that the acrylic polymer(s) comprise one or more motifs derived from the following monomers: a) (meth)acrylic acid; and b) alkyl (meth)acrylate in C1 to C30, preferably in C1 to C20, more preferably in C1 to C10, and even more preferably in C1 to C4.

17. A process according to any one of the preceding claims, characterized in that the polymer(s) comprising at least one reactive group selected from carboxylic acids, preferably acrylic polymers, are present in a total quantity ranging from 0.1 to 35% by weight, more preferably from 0.5 to 30% by weight, better still from 1 to 20% by weight, and even more preferably from 3 to 15% by weight relative to the total weight of composition T.

18. A method according to any one of the preceding claims, characterized in that the silicone(s) are selected from non-amine silicones, amino silicones and mixtures thereof.

19. A process according to any one of the preceding claims, characterized in that the composition T is devoid of coloring agent(s) selected from pigments, oxidation dye precursors, direct dyes, and mixtures thereof.

20. A method according to any one of the preceding claims, characterized in that step a) consists of extemporaneously mixing at the time of use at least one composition C as defined in any one of claims 1 to 6, with at least one chemical oxidizing agent, preferably hydrogen peroxide to obtain a mixture, and then applying said mixture to the hair.

21. A method according to any one of the preceding claims, characterized in that step b) consists of extemporaneously mixing at the time of use at least two compositions A and B to obtain a composition T, and then applying composition T to the hair, with: - composition A comprising at least one (poly)carbodiimide compound as defined in any one of claims 1 and 7 to 13; - composition B comprising at least one polymer comprising at least one reactive group selected from carboxylic acids as defined in any one of claims 1 and 15 to 16, preferably composition A and / or B being devoid of colouring agent(s) selected from pigments, direct dyes, oxidation dye precursors, and mixtures thereof.

22. A method according to any one of the preceding claims, characterized in that a rinsing step is carried out between step a) and step b).