FR2942591A1 - Composition, useful for coloring human keratin fibers, preferably human hair, comprises one or more synthetic direct dye and one or more aliphatic monohydroxy alcohol containing linear alkyl chain in a medium - Google Patents

Abstract

Dye composition comprises one or more synthetic direct dye having partition coefficient (Log P) of >= 2 and one or more aliphatic monohydroxy alcohol containing a 5-12C linear alkyl chain, in a medium. An independent claim is included for a multicompartment device comprising the composition and an oxidizing composition containing one or more oxidizing agents.

Description

The subject of the present invention is compositions for staining human keratinous fibers, comprising, in a cosmetically acceptable medium, at least one synthetic direct dye and at least one synthetic direct dye, and at least one synthetic direct dye, and at least one synthetic dyestuff. a monohydroxy alcohol with a linear alkyl chain. It also relates to a process for staining human keratin fibers involving such a composition, as well as a multi-compartment device.

Two major modes of staining human keratinous fibers, and in particular the hair, are known. The first, called oxidation or permanent staining, consists in using one or more oxidation dye precursors, more particularly one or more oxidation bases possibly associated with one or more couplers. Usually, oxidation bases are chosen from ortho- or para-phenylenediamines, ortho- or para-aminophenols as well as heterocyclic compounds. These oxidation bases are colorless or weakly colored compounds which, combined with oxidizing products, make it possible to access, by a process of oxidative condensation, colored species which remain trapped inside the fiber. Very often, the shades obtained with these oxidation bases are varied by combining them with one or more couplers, the latter being chosen in particular from aromatic meta-diamines, meta-aminophenols, meta-diphenols and certain heterocyclic compounds. such as indole compounds. The variety of molecules involved in the oxidation bases and couplers allows a rich palette of colors to be obtained.

The second mode of staining, referred to as direct or semi-permanent staining, includes the application of direct dyes which are color and dye molecules having affinity for the fibers. Given the nature of the molecules used, these remain rather on the surface of the fiber and penetrate relatively little inside the fiber, compared to the small molecules of precursors of oxidation dyes. The direct dyes generally employed are chosen from nitrobenzene, anthraquinone, nitropyridine, azo, methine, azomethine, xanthene, acridine, azine or triarylmethane direct dyes. The chemical species used may be nonionic, anionic (acidic dyes) or cationic (basic dyes). Most of the direct dyes used have sufficient aqueous solubility and there are now many coloring media adapted to receive them. The situation is different in the case of synthetic hydrophobic direct dyes. Indeed, to effectively color the keratinous fibers, some of these dyes must be in most cases used in the presence of solvents whose role is to vectorize them in the fiber. Among the known cosmetic solvents for this purpose, aromatic solvents are frequently used. Mention may more particularly be made of benzyl alcohol, benzyloxyethanol or phenoxyethanol. Nevertheless, the presence of aromatic alcohols in these formulations amplifies the problem of staining of the scalp and the skin, encountered during the staining process.

In addition, and this represents another disadvantage to the use of such dyes, the presence of aromatic solvents, very sparingly soluble in aqueous medium, requires the use of significant amounts of co-solvents (usually ethanol) to make them compatible with conventional dye formulations.

One of the objectives of the present invention is therefore to provide coloring compositions comprising at least one synthetic hydrophobic direct dye and which have satisfactory dyeing properties, in particular in that they make it possible to obtain powerful, homogeneous colorings between the tip and root of the same fiber and fiber to another, and chromatic, even on sensitized hair.

These and other objects are achieved by the present invention which relates to dye compositions comprising in a cosmetically acceptable medium, one or more synthetic direct dyes of LogP greater than or equal to 2, and one or more aliphatic monohydroxy alcohols containing a chain. C5-C12 linear alkyl.

It also relates to a process for staining human keratinous fibers, and in particular the hair, of applying to said fibers, the composition according to the invention. It also has for another object a multi-compartment device or kit comprising at least one composition according to the invention devoid of oxidizing agent and an oxidizing composition comprising one or more oxidizing agents.

Other features and advantages of the invention will emerge more clearly on reading the description and examples. It should be noted that in what follows, and unless otherwise indicated, the boundaries of a domain of values are included in this area.

As indicated above, the dyeing composition according to the invention comprises one or more synthetic direct dyes of Log P greater than or equal to 2.

By synthetic dyes is meant any dye whose chemical structure is not found in nature. For synthetic direct dyes of Log P greater than or equal to 2, it is recalled that the value of IogP conventionally represents the coefficient of partition of the dye between octanol and water. The IogP can be calculated according to the method described in the article by Meylan and Howard Atom / Fragment contribution method for estimating octanolwater partition coefficient, J. Pharm. Sci. 84: 83-92, 1995. This value can also be calculated from many commercially available software that determines the IogP according to the structure of a molecule. By way of example, mention may be made of the Epiwin software from the United States Environmental Agency. The dyes of Log P greater than or equal to 2 are hydrophobic dyes. In particular, the dyes that are suitable for carrying out the invention are chosen from the following compounds, alone or as a mixture: Dyestuff Chemical structure IogP Disperse Red 17 02N OH 3.69 N ~ NNOH OH2 Disperse Violet 1 t 3.0 O NH2 HC Yellow 7 OH 2.38 H2N N OH Disperse Blue 377 Î HN] 3.21 'OH O HN - OH Disperse Red 13 02N N OH 5.22 ci 2 Disperse Green 9 NN 4.23 o2N S HN o Solvent Black 3 7.50 Disperse Blue 148 NO2 4.81 $ 1 N ~, SNN o ~ Disperse Violet 63 02N HN 5.30 CN O CI Disperse Blue 60 O NHz O 3.38, O NH O ~ O z Disperse Blue 14 O HN 4.25 'O HN ~ Solvent Orange 15 H 3.90 Solvent Orange 7 HO 4.40 ` The hydrophobic direct dye (s) mentioned above represent from 0.001 to 15% by weight, preferably from 0.01 to 10% by weight, and even more preferably from 0.01 to 10% by weight. more particularly from 0.1 to 5% by weight, relative to the weight of the composition.

As indicated above, the aliphatic monohydroxyl alcohol or alcohols present in the composition according to the invention contain a linear C5-C12 alkyl chain, and more particularly, a linear C5-C10 alkyl chain. This alkyl chain is unsubstituted, that is to say that the monohydroxyl alcohols present in the composition according to the invention are neither (poly) oxyalkylenated with one or more C2-C4 alkylenated groups nor (poly) glycerolated. Preferably, the monohydroxyl alcohol (s) contain a linear C6-C10 alkyl chain, more preferably a C7-C10 alkyl chain. More specifically, the monohydoxylated alcohols of the invention are of formula R-OH, R denoting a linear C5-C12 alkyl chain, more particularly a linear C5-C10 alkyl chain, preferably a linear C6-C10 alkyl chain, and still more preferably C7-C10. According to a preferred embodiment of the invention, the monohydric alcohol is n-decanol. The content of monohydroxylated alcohol (s) in the composition represents more particularly from 0.1 to 50% by weight relative to the weight of said composition, and preferably from 0.1 to 30% by weight, relative to weight of the composition.

The composition according to the invention may also comprise one or more additional dyes different from the aforementioned direct synthetic dyes. In particular, this or these additional dyes may be chosen from natural dyes, synthetic direct dyes of LogP less than 2, oxidation dye precursors, or combinations thereof.

Thus, the composition may comprise one or more natural dyes.

By natural dyes is meant any dye or dye precursor having a natural occurrence and produced either by extraction (and optionally purification) from a plant matrix, or by chemical synthesis. The natural dye or dyes suitable in particular for the implementation of the invention are preferably chosen from lawsone, juglone, alizarin, purpurine, carminic acid, kermesic acid, purpurogallin, anthragallol, protocatechaldehyde, indigo, isatin, curcumin, spinusoline, chlorophylls, chlorophyllins, orceins, haematein, hematoxylin, brazilin, braziline, safflower dyes (eg carthamine), flavonoids (with, for example, morine, apigenidine, sandalwood), anthocyanins (of the apigeninidine type), carotenoids, tannins, sorghum and cochineal carmine, or mixtures thereof.

It is also possible to use the extracts or decoctions containing these natural dyes and in particular the henna extracts. Preferably, the natural dye (s) are chosen from lawsone, juglone, alizarin, purpurine, carminic acid, kermesic acid, purpurogalline, protocatechaldehyde, indigo, curcumin, spinulosin, apigenidine, chlorophylline, sorghum, orceins, isatin and carmine, or mixtures thereof. The natural dyes, if they are present, represent more particularly from 0.001 to 10% by weight, preferably from 0.01 to 8% by weight, even more preferentially from 0.1 to 5% by weight, relative to the weight of the composition.

The additional synthetic direct dye (s) of LogP less than 2 may be chosen from ionic or nonionic, preferably cationic or nonionic, species. As examples of suitable additional synthetic direct dyes, mention may be made of azo direct dyes; methinic; carbonyls; azinic; nitro (hetero) aryl; tri- (hetero) aryl methanes; porphyrins and phthalocyanines, alone or in mixtures.

More particularly, the azo dyes comprise a function -N = N- whose two nitrogen atoms are not simultaneously engaged in a ring. However, it is not excluded that one of the two nitrogen atoms of the sequence -N = N- is engaged in a cycle. The dyes of the family of methines are more particularly compounds comprising at least one sequence chosen from> C = C <and -N = C <whose two atoms are not simultaneously engaged in a ring. It is however specified that one of the nitrogen or carbon atoms of the chains can be engaged in a cycle. More particularly, the dyes of this family are derived from true methine-type compounds (comprising one or more -C = C- above-mentioned sequences); azomethine (comprising at least one or more -C = N- chains) with, for example, azacabocyanines and their isomers, diazacarbocyanines and their isomers, tetraazacarbocyanines; mono- and di-arylmethane; indoamines (or diphenylamines); indophenols; indoanilines. As regards the dyes of the carbonyl family, mention may be made, for example, of the dyes chosen from acridone, benzoquinone, anthraquinone, naphthoquinone, benzanthrone, anthranthrone, pyranthrone, pyrazolanthrone, pyrimidinoanthrone, flavanthrone, idanthrone, flavone, (iso) violanthrone, isoindolinone, benzimidazolone, isoquinolinone, anthrapyridone, pyrazoloquinazolone, perinone, quinacridone, quinophthalone, indigo, thioindigo, naphthalimide, anthrapyrimidine, diketopyrrolopyrrole, coumarin. As regards the dyes of the family of azines, there may be mentioned in particular azine, xanthene, thioxanthene, fluorindine, acridine, (di) oxazine, (di) thiazine, pyronine.

The nitro (hetero) aromatic dyes are more particularly nitrobenzene or nitro pyridinic direct dyes. With regard to porphyrin or phthalocyanine dyes, it is possible to use cationic or non-cationic compounds, optionally comprising one or more metals or metal ions, for example alkali and alkaline earth metals, zinc and silicon.

As examples of additional direct dyes of synthesis particularly suitable, mention may be made of the nitro dyes of the benzene series; azo direct dyes; methinic; azomethines with more particularly diazacarbocyanines and their isomers and tetraazacarbocyanines (tetraazapentamethines); quinone direct dyes and in particular anthraquinone, naphthoquinone or benzoquinone dyes; direct azine dyes; xanthenics; triarylmethanics; indoamines; indigoids; phthalocyanines and porphyrins; alone or in mixtures.

Preferably, the direct dyes are chosen from nitro dyes of the benzene series; azo; azomethines with diazacarbocyanines and their isomers, tetraazacarbocyanines (tetraazapentamethines); anthraquinone direct dyes; triarylmethane direct dyes; alone or in mixtures. Even more preferably, these additional direct dyes are chosen from nitro dyes of the benzene series; azo direct dyes; azomethines with diazacarbocyanines and their isomers, tetraazacarbocyanines (tetraazapentamethines); alone or in mixture.

These dyes may be monochromophoric dyes (that is to say comprising only one dye) or polychromophoric dyes, preferably di- or trichromophoric dyes; the chromophores which may be identical or different, of the same chemical family or not. It should be noted that a polychromophoric dye comprises several radicals each derived from an absorbing molecule in the visible range between 400 and 800 nm. In addition, this absorbance of the dye does not require any prior oxidation thereof, or association with other (s) species (s) chemical (s). In the case of polychromophoric dyes, the chromophores are connected to each other by means of at least one linker which may or may not be cationic. Among the polychromophoric dyes, mention may be made more particularly of di- or tri-chromophoric, preferably dichromophoric, azo and / or azomethine dyes, symmetrical or otherwise, comprising on the one hand at least one aromatic heterocycle comprising 5 or 6 ring members, optionally condensed mixture, comprising at least one quaternized nitrogen atom engaged in said heterocycle and optionally at least one other heteroatom (such as nitrogen, sulfur, oxygen), and on the other hand, at least one phenyl or naphthyl group optionally substituted, optionally bearing at least one OR group with R representing a hydrogen atom, an optionally substituted C1-C6 alkyl radical, an optionally substituted phenyl ring, or at least one N (R ') group 2 with R 'identical or not, representing a hydrogen atom, an optionally substituted alkyl radical C1-C6, an optionally substituted phenyl ring; the radicals R 'which can form, with the nitrogen atom to which they are bonded, a saturated 5- or 6-membered heterocycle, or else one and / or both radicals R' may each form with the carbon atom of the aromatic ring placed in ortho of the nitrogen atom, a 5- or 6-membered saturated heterocycle. As aromatic cationic heterocycle, there may be mentioned, preferably, 5- or 6-membered rings comprising 1 to 3 nitrogen atoms, preferably 1 or 2 nitrogen atoms, one being quaternized; said heterocycle being optionally further fused to a benzene ring. It should also be noted that the heterocycle may optionally comprise another heteroatom different from nitrogen, such as sulfur or oxygen. If the heterocycles or phenyl or naphthyl groups are substituted, they are substituted, for example, with one or more C 1 -C 8 alkyl radicals optionally substituted with a hydroxyl, C 1 -C 2 alkoxy or C 2 -C 4 hydroxyalkoxy, acetylamino or substituted amino group. one or two C 1 -C 4 alkyl radicals, optionally carrying a hydroxyl group or both radicals which can form, with the nitrogen atom to which they are attached, a 5- or 6-membered heterocycle, optionally comprising another identical heteroatom or different from nitrogen; a halogen atom; a hydroxyl group; a C1-C2 alkoxy radical; a hydroxyalkoxy radical at 02-04; an amino radical; an amino radical substituted with one or two identical or different C 1 -C 4 alkyl radicals optionally bearing a hydroxyl group. Preferably, the linker is a linear, branched or cyclic C1-C20 alkyl chain; optionally interrupted by at least one heteroatom (such as nitrogen, oxygen) and / or at least one group comprising (CO, SO2); optionally interrupted by at least one phenyl or substituted or unsubstituted naphthyl group; optionally interrupted by at least one saturated, unsaturated or aromatic heterocycle, condensed or not with a phenyl ring, said heterocycle comprising at least one quaternized nitrogen atom engaged in said ring and optionally at least one other heteroatom (such as oxygen, nitrogen or sulfur); optionally interrupted by at least one quaternary ammonium group substituted with two C 1 -C 15 alkyl groups; the linking arm does not comprise a nitro, nitroso or peroxo group. If the heterocycles or aromatic rings are substituted, they are substituted for example by one or more C 1 -C 8 alkyl radicals optionally substituted with a hydroxyl, C 1 -C 2 alkoxy, C 2 -C 4 hydroxyalkoxy, acetylamino or amino group substituted by one or two identical or different C1-C4 alkyl radicals, optionally bearing a hydroxyl group, or the two radicals which can form, with the nitrogen atom to which they are attached, a 5- or 6-membered heterocycle, optionally comprising another heteroatom identical or different from nitrogen; a halogen atom; a hydroxyl group; a C1-C2 alkoxy radical; a hydroxyalkoxy radical at 02-04; an amino radical; an amino radical substituted with one or two identical or different C 1 -C 4 alkyl radicals optionally bearing a hydroxyl group.

The link between the linker and each chromophore is generally by means of a heteroatom which substitutes the phenyl or naphthyl ring or by means of the quaternized nitrogen atom of the cationic heterocycle.

Among the azo, azomethine and methine monochromophoric direct dyes that may be used according to the invention, mention may be made of the cationic dyes described in patent applications WO 95/15144, WO 95/01772 and EP 714954; FR 2189006, FR 2285851, FR-2140205, EP 1378544, EP 1674073.

Thus, mention may in particular be made of the cationic direct dyes corresponding to the following formulas: R 3 in which: D represents a nitrogen atom or the group -CH, R 3 and R 2, which are identical or different, represent a hydrogen atom; a C 1 -C 4 alkyl radical which may be substituted with a -CN, -OH or -NH 2 radical or form, with a carbon atom of the benzene ring, an optionally oxygenated or nitrogenous heterocycle, which may be substituted by one or more C 1 -C 4 alkyl radicals; C4; a 4'-aminophenyl radical, R3 and R'3, which may be identical or different, represent a hydrogen or halogen atom chosen from chlorine, bromine, iodine and fluorine, a cyano radical or a C1-C6 alkyl radical; C4, C1-C4 alkoxy or acetyloxy,

X - represents an anion preferably selected from chloride, methyl sulfate and acetate, A represents a group chosen by the following structures: R, R4 Ra N.Ra N R4 ~~~~~~~~~ Wherein R4 represents a C1-C4 alkyl radical which may be substituted by a hydroxyl radical; R6 EiDiD2u (N) in which:

R5 represents a hydrogen atom, a C1-C4 alkoxy radical, a halogen atom such as bromine, chlorine, iodine or fluorine, R6 represents a hydrogen atom, a C1-C4 alkyl radical; C4 or form with a carbon atom of the benzene ring a heterocycle optionally oxygenated and / or substituted with one or more C1-C4 alkyl groups, R7 represents a hydrogen or halogen atom such as bromine, chlorine, l iodine or fluorine, D, and D2, which may be identical or different, represent a nitrogen atom or the -CH group, m = 0 or 1, X - represents a cosmetically acceptable anion and preferably chosen from chloride, methyl sulfate and acetate, E represents a group chosen by the following structures: R '-N + -N + ~ N + \ - R' R 'in which R' represents a C1-C4 alkyl radical; when m = 0 and D, represents a nitrogen atom, then E can also denote a group of following structure: R 'R' in which R 'represents a C1-C4 alkyl radical. Among the abovementioned compounds, the following compounds are especially used: CH 3 / H 3, - N N CH 3

N = N N-CH3 X- 1 N = N Ni x- N + H - N + CH3 CH3 CH3 CH3

N + N CH3 CH3 NH3 X- N = NN = N NH2 X- OCH3 X- X- H3C-N / C = NN \ - CH3 ~ / \ H3C-N + \ C = NN \ H CH3 Among the dyes of the type Tetraazapentamethines that can be used according to the invention include the following compounds appearing in the table below: ## STR1 ## Is an anion preferably chosen from chloride, iodide, methyl sulphate, methyl sulphate, N, NN, NN, NN, NNXNN, NNXOH, NN, NN, NH ethyl sulfate, acetate.

Preferably, the direct dyes are chosen from monochromophoric direct dyes of nitrobenzene type; azo; azomethines with diazacarbocyanines and their isomers, tetraazacarbocyanines (tetraazapentamethines); anthraquinone direct dyes; triarylmethane direct dyes; and even more particularly among nitrobenzene dyes; azo; azomethines with diazacarbocyanines and their isomers, tetraazacarbocyanines (tetraazapentamethines); these dyes being present alone or in mixture. When present, the additional direct dye (s) of synthesis represent from 0.0001 to 10% by weight relative to the weight of the composition, and preferably from 0.005 to 5% by weight relative to the same reference.

The oxidation dye precursors that may be present are chosen from oxidation bases and couplers. Preferably, the oxidation dye precursors comprise an oxidation base or a mixture. By way of example, the oxidation bases are chosen from para-phenylenediamines, bis-phenylalkylenediamines, para-aminophenols, ortho-aminophenols, heterocyclic bases and their addition salts.

Among the paraphenylenediamines, there may be mentioned, for example, para-phenylenediamine, paratoluylenediamine, 2-chloro-para-phenylenediamine, 2,3-dimethyl-para-phenylenediamine, 2,6-dimethyl paraphenylenediamine, 2,6-diethyl paraphenylenediamine, 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 - ((3-hydroxyethyl) paraphenylenediamine, 4-N, N-bis - ((3-hydroxyethyl) amino-2-methylaniline, 4-N, N-bis - ((3-hydroxyethyl) amino 2-chloro aniline, 2-13-hydroxyethyl paraphenylenediamine, 2-fluoro-para-phenylenediamine, 2-isopropyl-para-phenylenediamine, N-O-hydroxy-propyl) paraphenylenediamine, 2-hydroxymethyl-para-phenylenediamine, N, N-dimethyl-3-methyl-para-phenylenediamine, N N- (ethyl, (3-hydroxyethyl) paraphenylenediamine, N-O 3, γ-dihydroxypropyl) p aphenylenediamine, N- (4'-aminophenyl) paraphenylenediamine, N-phenyl paraphenylenediamine, 2-13-hydroxyethyloxy para-phenylenediamine, 2-13-acetylaminoethyloxy para-phenylenediamine, N - ((3-methoxyethyl) paraphenylenediamine, 4 aminophenylpyrrolidine, 2-thienyl paraphenylenediamine, 2-hydroxyethylamino-5-amino toluene, 3-hydroxy-1- (4'-aminophenyl) pyrrolidine and their addition salts with an acid. Of the paraphenylenediamines mentioned above, paraphenylenediamine, paratoluylenediamine, 2-isopropyl paraphenylenediamine, 2-hydroxy-3-hydroxyethyl paraphenylenediamine, 2-hydroxy-hydroxyethyloxy-para-phenylenediamine, 2,6-dimethyl-para-phenylenediamine, 2,6 ethyl paraphenylenediamine, 2,3-dimethyl paraphenylenediamine, N, N-bis - ((3-hydroxyethyl) paraphenylenediamine, 2-chloro-para-phenylenediamine, 2-13-acetylaminoethyloxy-para-phenylenediamine, and their addition salts with an acid Particularly preferred bis-phenylalkylenediamines include, for example, N, N'-bis- (13-hydroxyethyl) N, N'-bis (4'-aminophenyl) -1,3-diamino. propanol, N, N'-bis - ((3-hydroxyethyl) N, N'-bis- (4'-aminophenyl) ethylenediamine, N, N'-bis- (4-aminophenyl) tetramethylenediamine, N, N bis ((3-hydroxyethyl) N, N'-bis (4-aminophenyl) tetramethylenediamine, N, N'-bis- (4-methylaminophenyl) tetrameth N, N'-bis (ethyl) N, N'-bis (4'-amino, 3'-methylphenyl) ethylenediamine, 1,8-bis (2,5-diamino phenoxy) -3-ylenediamine , 6-dioxaoctane, and their addition salts. Among para-aminophenols, para-aminophenol, 4-amino-3-methylphenol, 4-amino-3-fluoro phenol, 4-amino-3-chlorophenol, 4- amino 3-hydroxymethyl phenol, 4-amino-2-methylphenol, 4-amino-2-hydroxymethylphenol, 4-amino-2-methoxymethylphenol, 4-amino-2-aminomethylphenol, 4-amino-2 - ( 3-hydroxyethylaminomethyl) phenol, 4-amino-2-fluoro phenol, and their addition salts with an acid Among the ortho-aminophenols, there may be mentioned, by way of example, 2-amino phenol, 2- amino-5-methylphenol, 2-amino-6-methylphenol, 5-acetamido-2-amino phenol, and their addition salts.

Among the heterocyclic bases that may be mentioned by way of example are pyridine derivatives, pyrimidine derivatives and pyrazole derivatives. Among the pyridine derivatives, mention may be made of the compounds described for example in patents GB 1 026 978 and GB 1 153 196, such as 2,5-diaminopyridine, 2- (4-methoxyphenyl) amino 3-amino pyridine, 3,4-diamino pyridine, and their addition salts. Other pyridinic oxidation bases useful in the present invention are the 3-amino pyrazolo [1,5-a] pyridines oxidation bases or their addition salts described for example in the patent application FR 2801308. By way of example, mention may be made of pyrazolo [1,5-a] pyridin-3-ylamine; 2-acetylamino pyrazolo [1,5-a] pyridin-3-ylamine; 2-morpholin-4-yl-pyrazolo [1,5-a] pyridin-3-ylamine; 3-amino-pyrazolo [1,5-a] pyridin-2-carboxylic acid; 2-methoxy-pyrazolo [1,5-a] pyridin-3-ylamino; (3-amino-pyrazolo [1,5-a] pyridin-7-yl) -methanol; 2- (3-Amino-pyrazolo [1,5-a] pyridin-5-yl) -ethanol; 2- (3-aminopyrazolo [1,5-a] pyridin-7-yl) -ethanol; (3-Amino-pyrazolo [1,5-a] pyridin-2-yl) -methanol; 3,6-diamino-pyrazolo [1,5-a] pyridine; 3,4-diamino-pyrazolo [1,5-a] pyridine; pyrazolo [1,5-a] pyridine-3,7-diamine; 7-morpholin-4-yl-pyrazolo [1,5-a] pyridin-3-ylamine; pyrazolo [1,5-a] pyridine-3,5-diamine; 5-morpholin-4-yl-pyrazolo [1,5-a] pyridin-3-ylamine; 2 - [(3-amino-pyrazolo [1,5-a] pyridin-5-yl) - (2-hydroxyethyl) amino] ethanol; 2 - [(3-aminopyrazolo [1,5-a] pyridin-7-yl) - (2-hydroxyethyl) amino] ethanol; 3-amino-pyrazolo [1,5-a] pyridin-5-ol; 3-amino-pyrazolo [1,5-a] pyridin-4-ol; 3-amino-pyrazolo [1,5-a] pyridine-6,01; 3-amino-pyrazolo [1,5-a] pyridin-7-ol; as well as their addition salts. Among the pyrimidine derivatives, mention may be made of the compounds described, for example, in 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 tautomeric forms, when tautomeric equilibrium exists. Among the pyrazole derivatives, mention may be made of the compounds described in DE 3843892, DE 4133957 and patent applications WO 94/08969, WO 94/08970, FR-A-2 733 749 and DE 195 43 988 as the 4.5 1-methyl pyrazole, 4,5-diamino 1- (3-hydroxyethyl) pyrazole, 3,4-diamino pyrazole, 4,5-diamino-1- (4'-chlorobenzyl) pyrazole, 4, 5-diamino 1,3-dimethyl pyrazole, 4,5-diamino-3-methyl-1-phenylpyrazole, 4,5-diamino-1-methyl-3-phenylpyrazole, 4-amino-1,3-dimethyl-5-hydrazino pyrazole, 1-benzyl 4,5-diamino-3-methyl pyrazole, 4,5-diamino-3-tert-butyl-1-methyl pyrazole, 4,5-diamino-1-tert-butyl-3-methyl pyrazole, 4 5-diamino-1- (8-hydroxyethyl) 3-methylpyrazole, 4,5-diamino-1-ethyl-3-methyl-pyrazole, 4,5-diamino-1-ethyl-3- (4'-methoxyphenyl) pyrazole, 4,5-diamino-1-ethyl-3-hydroxymethyl pyrazole, 4,5-diamino-3-hydroxymethyl-1-methyl pyrazole, 4,5-diamino-3-hydroxymethyl-1-isopropyl pyrazole, 4,5-diamino-3-meth 1-isopropyl pyrazole, 4-amino 5- (2'-aminoethyl) amino 1,3-dimethyl pyrazole, 3,4,5-triamino pyrazole, 1-methyl 3,4,5-triamino pyrazole, 3,5-diamino-1-methyl-4-methylamino pyrazole, 3,5-diamino 4- (8-hydroxyethyl) amino-1-methyl pyrazole, and their addition salts. It is also possible to use 4-5-diamino-1- (8-methoxyethyl) pyrazole.

As pyrazole derivatives, mention may also be made of diamino N, N-dihydropyrazolopyrazolones and in particular those described in patent application FR 2886136, such as the following compounds and their addition salts: 2,3-Diamino-6,7-dihydro-1 H, 5H-pyrazolo [1,2-a] pyrazol-1-one, 2-amino-3-ethylamino-6,7-dihydro-1H, 5H-pyrazolo [1,2-a] pyrazol-1-one 2-Amino-3-isopropylamino-6,7-dihydro-1H, 5H-pyrazolo [1,2-a] pyrazol-1-one, 2-amino-3- (pyrrolidin-1-yl) -6, 7-Dihydro-1H, 5H-pyrazolo [1,2-a] pyrazol-1-one, 4,5-diamino-1,2-dimethyl-1,2-dihydro-pyrazol-3-one, 4.5 -Diamino-1,2-diethyl-1,2-dihydro-pyrazol-3-one, 4,5-diamino-1,2-di- (2-hydroxyethyl) -1,2-dihydro-pyrazol-3-one 2-amino-3- (2-hydroxyethyl) amino-6,7-dihydro-1H, 5H-pyrazolo [1,2-a] pyrazol-1-one, 2-amino-3-dimethylamino-6,7 1-Dihydro-1H, 5H-pyrazolo [1,2-a] pyrazol-1-one, 2,3-diamino-5,6,7,8-tetrahydro-1H, 6H-pyridazino [1,2-a] ] pyrazol-1-one, 4-amino-1,2-diethyl-5- (pyrrolidin-1-yl) -1,2-dihydro-pyrazol-3-one, 4-amino-5- (3-dimeth) ylamino-pyrrolidin-1-yl) -1,2-diethyl-1,2-dihydro-pyrazol-3-one, 2,3-diamino-6-hydroxy-6,7-dihydro-1H, 5H-pyrazolo [ 1,2-a] pyrazol-1-one. As heterocyclic bases, 4,5-diamino-1 - ([3-hydroxyethyl) pyrazole and / or 2,3-diamino-6,7-dihydro-1H, 5H-pyrazolo [1,2, are preferably used. A] pyrazol-1-one and their addition salts. The composition according to the invention may optionally comprise one or more couplers advantageously chosen from those conventionally used for dyeing keratinous fibers.

Among these couplers, there may be mentioned meta-phenylenediamines, meta-aminophenols, meta-diphenols, naphthalenic couplers, heterocyclic couplers and their addition salts. By way of example, mention may be made of 1,3-dihydroxybenzene, 1,3-dihydroxy-2-methylbenzene, 4-chloro-1,3-dihydroxybenzene and 2,4-diamino-1- (B- hydroxyethyloxy) benzene, 2-amino 4- (B-hydroxyethylamino) 1-methoxybenzene, 1,3-diamino benzene, 1,3-bis (2,4-diaminophenoxy) propane, 3-ureido aniline, 3-ureido 1-dimethylamino benzene, sesamol, 1-β-hydroxyethylamino-3,4-methylenedioxybenzene, α-naphthol, 2-methyl-1-naphthol, 6-hydroxyindole, 4-hydroxyindole, 4-hydroxy N-methylindole, 2-amino-3-hydroxypyridine, 6-hydroxybenzomorpholine 3,5-diamino-2,6-dimethoxypyridine, 1-N- (B-hydroxyethyl) amino-3 , 4-methylene dioxybenzene, 2,6-bis- (β-hydroxyethylamino) toluene, 6-hydroxy indoline, 2,6-dihydroxy 4-methyl pyridine, 1-H 3 -methyl pyrazole 5-one, 1-phenyl-3-methyl pyrazole-5-one, 2,6-dimethyl pyrazolo [1,5-b] -1,2,4-triazole, 2,6-dimethyl [3,2-c] -1, 2,4-triazole, 6-methyl pyrazolo [1,5- a] -benzimidazole, their addition salts with an acid, and mixtures thereof.

In general, the addition salts of the oxidation bases and couplers that can be used in the context of the invention are chosen especially from the addition salts with an acid such as hydrochlorides, hydrobromides, sulphates, citrates, succinates, tartrates, lactates, tosylates, benzenesulfonates, phosphates and acetates. The oxidation base or bases, when they are present in the composition, advantageously represent from 0.0001 to 10% by weight relative to the weight of the composition, and preferably from 0.005 to 5% by weight relative to the weight of the composition. the composition. The coupler or couplers, if present, advantageously represent from 0.0001 to 10% by weight relative to the weight of the composition, and preferably from 0.005 to 5% by weight relative to the weight of the composition.

The dyeing composition according to the invention may also comprise one or more conditioning agents.

By way of example, mention may be made of linear, cyclic, branched or unbranched, volatile or non-volatile silicones. These silicones can be in the form of oils, resins or gums, they can in particular be polyorganosiloxanes insoluble in the cosmetically acceptable medium. Organopolysiloxanes are further defined in Walter Noll's "Chemistry and Technology of Silicones" (1968) Academic Press. They can be volatile or non-volatile. When they are volatile, the silicones are more particularly chosen from those having a boiling point of between 60 ° C. and 260 ° C. As the conditioning agent, it is also possible to use cationic polymers such as polyquaterniums. 22, 6, 10, 11, 35 and 37 and hexadimethrin chloride. The concentration of conditioning agent (s) in the composition (s) useful in the invention may vary from 0.01% to 10% by weight relative to the total weight of the composition, preferably from 0.05% to 5% and more. preferentially still from 0.1 to 3%.

The compositions according to the invention may also contain one or more organic thickeners. The organic thickening agents may be chosen from fatty acid amides (diethanol or coconut monoethanol amide, oxyethylenated alkyl ether carboxylic acid monoethanolamide), polymeric thickeners such as cellulosic thickeners (hydroxyethylcellulose, hydroxypropylcellulose, carboxymethylcellulose), guar gum and its derivatives (hydroxypropylguar), gums of microbial origin (xanthan gum, scleroglucan gum), crosslinked homopolymers of acrylic acid or acrylamidopropanesulfonic acid and associative polymers (amphiphilic polymers comprising hydrophilic zones and hydrophobic fatty-chain zones capable, in an aqueous medium, of reversibly associating with each other or with other molecules.) According to one particular embodiment, the thickener is polymeric and chosen from cellulose thickeners (hydroxyethylcellulose, hydroxypropylcellulose, carboxymethylcellulose), guar gum and its derivatives (hydroxypropylguar), gums of microbial origin (xanthan gum, gum scleroglucan), crosslinked homopolymers of acrylic acid or acrylamidopropanesulfonic acid.

With regard to the associative thickeners, it is possible to use one or more polymers of nonionic or ionic nature, preferably anionic or cationic. Their chemical structure more particularly comprises at least one hydrophilic zone and at least one hydrophobic zone. Hydrophobic group is understood to mean a linear or branched, saturated or unsaturated hydrocarbon-based radical or polymer comprising at least 8 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. Preferably, the hydrocarbon group comes from a monofunctional compound. By way of example, the hydrophobic group may be derived from a fatty alcohol such as stearyl alcohol, dodecyl alcohol or decyl alcohol. It can also denote a hydrocarbon polymer such as for example polybutadiene.

Among the anionic amphiphilic polymers comprising at least one fatty chain (hydrophobic), mention may be made of: (I) polymers comprising at least one hydrophilic unit, and at least one fatty chain allyl ether unit, more particularly those whose hydrophilic unit is constituted by an ethylenic unsaturated anionic monomer, advantageously a vinyl carboxylic acid and very particularly by an acrylic acid or a methacrylic acid or mixtures thereof, and whose fatty-chain allyl ether unit corresponds to the monomer of following formula (A): ## STR2 ## in which R 'denotes H or CH 3, B denotes the ethyleneoxy radical, n is zero or denotes an integer ranging from 1 to 100, R denotes a hydrocarbon radical; chosen from alkyl, arylalkyl, aryl, alkylaryl and cycloalkyl radicals, comprising from 8 to 30 carbon atoms, preferably from 10 to 24, and even more particularly from 12 to 18 carbon atoms; e. A unit of formula (A) more particularly preferred is a unit in which R 'denotes H, n is equal to 10, and R denotes a stearyl (O18) radical. Of these anionic fatty-chain polymers, polymers formed from 20 to 60% by weight of acrylic acid and / or methacrylic acid, from 5 to 60% by weight of lower alkyl (meth) acrylates are preferred. from 2 to 50% by weight of fatty-chain allyl ether of formula (A), and from 0 to 1% by weight of a crosslinking agent which is a well-known copolymerizable polyethylenic unsaturated monomer, such as sodium phthalate; diallyl, allyl (meth) acrylate, divinylbenzene, (poly) ethylene glycol dimethacrylate, and methylenebisacrylamide.

Among these, the crosslinked terpolymers of methacrylic acid, ethyl acrylate, polyethylene glycol (10 OE) and stearyl alcohol ether (Steareth 10) are particularly preferred, in particular those sold by the company ALLIED COLLOIDS under the names SALCARE SC 80 and SALCARE SC90 which are 30% aqueous emulsions of a crosslinked terpolymer of methacrylic acid, ethyl acrylate and steareth-10-allyl ether (40/50/10). (II) polymers comprising at least one hydrophilic unit of unsaturated olefinic carboxylic acid type, and at least one hydrophobic unit of the (C 10 -C 30) alkyl ester of unsaturated carboxylic acid type. Preferably, these polymers are chosen from those in which the olefinic unsaturated carboxylic acid hydrophilic unit corresponds to the following monomer of formula (B): ## STR2 ## wherein R 1 denotes H or CH 3 or C 2 H 5; that is to say, acrylic acid, methacrylic acid or ethacrylic acid units, and whose hydrophobic unit of the (C 10 -C 30) alkyl ester of unsaturated carboxylic acid type corresponds to the following monomer of formula (C): CH 2 Where OR 3 wherein R 2 is H or CH 3 or C 2 H 5 (ie acrylate, methacrylate or ethacrylate units) and preferably H (acrylate units) or CH 3 (methacrylate units), R 3 denoting a C1-C30 alkyl radical, and preferably a C1-C22 alkyl radical. The (C 10 -C 30) alkyl esters of unsaturated carboxylic acids are, for example, lauryl acrylate, stearyl acrylate, decyl acrylate, isodecyl acrylate, dodecyl acrylate, and the like. and corresponding methacrylates, lauryl methacrylate, stearyl methacrylate, decyl methacrylate, isodecyl methacrylate, and dodecyl methacrylate. Among this type of fatty-chain anionic polymers, polymers formed from a monomer mixture comprising: (i) essentially acrylic acid, (ii) an ester of formula (C) described herein above and wherein R2 denotes H or CH3, R3 denotes an alkyl radical having from 12 to 22 carbon atoms, (iii) and a crosslinking agent, which is a well-known copolymerizable polyethylene unsaturated monomer, such as diallyl phthalate, allyl (meth) acrylate, divinylbenzene, (poly) ethylene glycol dimethacrylate, and methylenebisacrylamide. Among this type of fatty-chain anionic polymers, use will more particularly be made of 95 to 60% by weight of acrylic acid (hydrophilic unit), 4 to 40% by weight of C 10 -C 30 alkyl acrylate (unit hydrophobic), and 0 to 6% by weight of crosslinking polymerizable monomer, or those consisting of 98 to 96% by weight of acrylic acid (hydrophilic unit), 1 to 4% by weight of C10 alkyl acrylate -C30 (hydrophobic unit), and 0.1 to 0.6% by weight of crosslinking polymerizable monomer such as those described above. Among said polymers above, the products sold by the company Goodrich under the trade names Pemulen Tri, Pemulen TR2, Carbopol 1382, and even more preferentially Pemulen Tri, and the product sold by the company, are particularly preferred according to the present invention. SEPPIC company under the name COATEX SX.

(III) terpolymers of maleic anhydride / C30-C38 alpha-olefin / alkyl maleate such as the product (maleic anhydride copolymer / C30-C38 α-olefin / isopropyl maleate) sold under the name PERFORMA V 1608 by the company NEWPHASE TECHNOLOGIES.

(IV) acrylic terpolymers comprising: (a) 20% to 70% by weight of an α,--monoethylenically unsaturated carboxylic acid, (b) 20 to 80% by weight of an unsaturated monomer α, 13-monoethylenic non-surfactant other than (a), (c) 0.5 to 60% by weight of a nonionic mono-urethane which is the reaction product of a monohydric surfactant with a monoisocyanate with monoethylenic unsaturation, such as those described in patent application EP-A-0173109 and more particularly a methacrylic acid / methyl acrylate / dimethyl metaisopropenyl benzyl isocyanate terpolymer of ethoxylated behenyl alcohol (400E) in aqueous dispersion at 25%. (V) copolymers comprising among their monomers an α, β-monoethylenically unsaturated carboxylic acid and an α,--monoethylenically unsaturated carboxylic acid ester and an oxyalkylenated (C 8 -C 30) fatty alcohol. Preferably, these compounds also comprise, as monomer, a carboxylic acid ester having α, β-monoethylenic unsaturation and of C 1 -C 4 alcohol. By way of example of this type of compound, mention may be made of Aculyn 22 sold by Rohm and Haas, which is a methacrylic acid / ethyl acrylate / stearyl methacrylate oxyalkylenated terpolymer.

The fatty-chain (hydrophobic) nonionic amphiphilic polymers are preferably chosen from:

- (1) celluloses modified with groups comprising at least one fatty chain, such as in particular; Hydroxyethylcelluloses modified with groups containing at least one fatty chain such as alkyl, arylalkyl or alkylaryl groups, or mixtures thereof, and in which the alkyl groups are preferably C8-C22, such as the product NATROSOL PLUS GRADE 330 CS (C16 alkyls) sold by the company AQUALON, or the BERMOCOLL EHM 100 product sold by the company BEROL NOBEL, - those modified with polyalkylene glycol ether alkyl phenol groups, such as the product AMERCELL POLYMER HM-1500 ( polyethylene glycol (15) nonylphenol ether) sold by the company Amerchol.

(2) hydroxypropyl guars modified with groups comprising at least one fatty chain such as the product ESAFLOR HM 22 (C22 alkyl chain) sold by LAMBERTI, the products RE210-18 (C14 alkyl chain) and RE205- 1 (C20 alkyl chain) sold by RHONE POULENC.

(3) copolymers of vinyl pyrrolidone and of hydrophobic fatty-chain monomers, with for example: ANTARON V216 or GANEX V216 products (vinylpyrrolidone / hexadecene copolymer) sold by I.S.P. products ANTARON V220 or GANEX V220 (vinylpyrrolidone / eicosene copolymer) sold by the company I.S.P. (4) copolymers of methacrylates or of C1-C6 alkyl acrylates and of amphiphilic monomers comprising at least one fatty chain, such as, for example, the oxyethylenated methyl acrylate / stearyl acrylate copolymer sold by the company GOLDSCHMIDT under the name ANTIL 208. (5) copolymers of hydrophilic methacrylates or acrylates and of hydrophobic monomers comprising at least one fatty chain, such as, for example, polyethylene glycol methacrylate / lauryl methacrylate copolymer.

And (6) polymers having an aminoplast ether backbone having at least one fatty chain, such as the PURE THIX compounds proposed by the company Sud-Chemie.

(7) polyether polyurethanes comprising in their chain both hydrophilic sequences of a most often polyoxyethylenated nature and hydrophobic sequences which may be aliphatic linkages alone and / or cycloaliphatic and / or aromatic linkages. Preferably, the polyether polyurethanes comprise at least two hydrocarbon fatty chains having from 8 to 30 carbon atoms, separated by a hydrophilic sequence, the hydrocarbon chains possibly being pendant chains or chains at the end of the hydrophilic sequence.

As examples of nonionic fatty-chain polyurethane polyethers that may be used in the invention, use may be made of the urea-functional Rheolate 205 sold by Rheox or else the Rheolates 208, 204 or 212, as well as Acrysol RM 184. Aculyn or Acrysol 44 and Aculyn or Acrysol 46 from the company Rohm & Haas [Aculyn 46 is a polycondensate of polyethylene glycol with 150 or 180 moles of ethylene oxide, stearyl alcohol and methylene bis (4-cyclohexyl isocyanate) (SMDI), 15% by weight in a matrix of maltodextrin (4%) and water (81%); ACULYN 44 is a polycondensate of polyethylene glycol with 150 or 180 moles of ethylene oxide, decyl alcohol and methylenebis (4-cyclohexylisocyanate) (SMDI), at 35% by weight in a propylene glycol mixture (39). %) and water (26%)]. Mention may also be made of the product ELFACOS T210 with a C12-C14 alkyl chain and the product ELFACOS T212 with a C18 alkyl chain from AKZO, as well as the product DW 1206B from ROHM & HAAS with a C20 alkyl chain and with a urethane linkage. , proposed to 20% by dry matter in water.

It is also possible to use solutions or dispersions of these polymers, especially in water or in an aqueous-alcoholic medium. By way of example, such polymers include, for example, Rheolate 255, Rheolate 278 and Rheolate 244 sold by Rheox. It is also possible to use the product DW 1206F and the DW 1206J proposed by the company Rohm & Haas. The polyether polyurethanes that can be used according to the invention are in particular those described in the article by G. Fonnum, J. Bakke and Fk. Hansen - Colloid Polym. Sci 271, 380, 389 (1993).

The cationic amphiphilic polymers comprising at least one fatty (hydrophobic) chain used may in particular be chosen from quaternized cellulose derivatives, cationic polyurethanes, cationic polyvinyllactams, and preferably from quaternized cellulose derivatives. Examples of polymers of this type include: quaternized celluloses modified with groups comprising at least one fatty chain, such as alkyl, arylalkyl or alkylaryl groups containing at least 8 carbon atoms, or mixtures thereof; quaternized hydroxyethylcelluloses modified with groups having at least one fatty chain, such as alkyl, arylalkyl, alkylaryl groups having at least 8 carbon atoms, or mixtures thereof. The alkyl radicals borne by the above-quaternized celluloses or hydroxyethylcelluloses preferably contain from 8 to 30 carbon atoms. The aryl radicals preferably denote phenyl, benzyl, naphthyl or anthryl groups. Examples of C8-C30 fatty chain quaternized alkylhydroxyethylcelluloses are QUATRISOFT LM 200, QUATRISOFT LM-X 529-18-A, QUATRISOFT LM-X 529-18B (C12alkyl) and QUATRISOFT LM-X. 529-8 (C18 alkyl) marketed by the company AMERCHOL and the products CRODACEL QM, CRODACEL QL (C12 alkyl) and CRODACEL QS (C18 alkyl) marketed by the company CRODA.

The content of thickening polymers, if present, usually ranges from 0.05% to 5% by weight, based on the weight of the coloring composition.

According to a particularly advantageous embodiment, the dye composition comprises one or more surfactants. These can be indifferently chosen, alone or in mixtures, from anionic, amphoteric, nonionic, zwitterionic and cationic surfactants. As regards the anionic surfactants, the salts, in particular the alkali metal salts such as the sodium salts, the ammonium salts, the amine salts, the aminoalcohol salts or the metal salts, are usually used. alkaline earth metals, for example magnesium, of the following compounds, alone or as a mixture: alkyl sulphates, alkyl ether sulphates, alkylamido ether sulphates, alkyl aryl polyether sulphates; alkylsulfonates, alkylamidesulfonates, alkylarylsulfonates; alkylsulfosuccinates, alkylethersulfosuccinates, alkylamide-sulfosuccinates; alkylsulfoacetates; acylsarconisates; and acylglutamates: alkyl and polyglycoside carboxylic acid esters such as alkyl glucoside citrates, alkyl polyglycoside tartrates, and alkyl polyglycoside sulfosuccinates; alkylsulfosuccinamates; acylisethionates, N-acyltaurates; acyllactylates; alkyl-D-galactoside uronic acids; polyoxyalkylenated alkyl ether carboxylic acids, polyoxyalkylenated alkylarylether carboxylic acids, polyoxyalkylenated alkylamidoether carboxylic acids; the alkyl or acyl group (RCO-) of these compounds having from 10 to 24 carbon atoms and the aryl group preferably denoting a phenyl or benzyl group; the number of oxyalkylenated groups, and preferably oxyethylenated, is between 2 and 50.

As regards the nonionic surfactants, the latter may advantageously be chosen from the following compounds, alone or as a mixture: polyethoxylated, polypropoxylated or polyglycerolated fatty alcohols, polyethoxylated, polypropoxylated or polyglycerolated alpha-diols, the number of ethylene or propylene oxide ranging from 2 to 50; the number of glycerol groups ranging from 2 to 30; condensates of ethylene oxide and propylene oxide on fatty alcohols; polyethoxylated fatty amides having from 2 to 30 moles of ethylene oxide; polyglycerolated fatty amides containing from 1 to 5 glycerol groups; polyethoxylated fatty amines having from 2 to 30 moles of ethylene oxide; ethoxylated fatty acid esters of sorbitan having from 2 to 30 moles of ethylene oxide, fatty acid esters of sucrose; alkylpolyglucosides, N-alkylglucamine derivatives; these compounds comprising at least one alkyl or alkenyl chain comprising 10 to 24 carbon atoms. copolymers of ethylene oxide and of propylene oxide.

The cationic surfactants used in the composition according to the invention may in particular be chosen from the following compounds, alone or as a mixture: primary, secondary or tertiary fatty amines optionally polyethoxylated (2 to 30 moles of ethylene oxide) and their salts, quaternary ammonium salts, with or without one or more ester functions, such as tetraalkylammonium, alkylamidoalkyltrialkylammonium, trialkylbenzylammonium, trialkylhydroxyalkylammonium, alkylpyridinium chlorides or bromides, and quaternary diesters; alkyl imidazoline; these compounds comprising at least one alkyl chain comprising 10 to 24 carbon atoms.

Finally, the amphoteric surfactants may be chosen from the following compounds, alone or as a mixture: derivatives of secondary or tertiary aliphatic amines, in which the aliphatic group is a linear or branched chain containing 10 to 24 carbon atoms and comprising at least a water-soluble anionic group such as, for example, a carboxylate, sulphonate, sulphate, phosphate or phosphonate group, alkylbetaines, sulphobetaines, (C6-C8) alkylamidoalkyl betaines, (C6-C8) alkylamidoalkylsulfobetaines; these compounds comprising at least one alkyl chain comprising from 10 to 24 carbon atoms.

Preferably, the surfactants are nonionic, anionic or amphoteric and even more preferably nonionic.

Usually, the surfactants represent an amount of between 0.01 and 50% by weight, preferably between 0.1 and 25% by weight relative to the weight of the composition. The dyeing composition according to the invention may also contain various adjuvants conventionally used in compositions for dyeing hair, such as, for example, anionic, nonionic, amphoteric or zwitterionic polymers other than the previously mentioned thickeners, or mixtures thereof; mineral thickeners such as clays; antioxidants such as for example ascorbic acid, erythorbic acid; reducing agents with inter alia sulphite, bisulphite or ammonium metabisulphite, ammonium thiolactate; penetrating agents, sequestering agents such as ethylenediamine tetraacetic or its salts; perfumes ; matting agents with, for example, titanium oxides; buffers; dispersants; film-forming agents; ceramide ceramides; carboxylic acids, especially aromatic acids such as benzoic acid; and preservatives. The adjuvants above are generally present in an amount for each of them between 0.01 and 20% by weight relative to the weight of the composition.

The cosmetically acceptable medium of the composition, which is a suitable medium for dyeing human keratinous fibers, preferably comprises water and optionally one or more additional organic solvents different from the monohydroxyl alcohol (s) containing a linear C5-alkyl chain. C12.

As examples of such additional solvents, mention may be made, for example, linear or branched alkanols, 02-04, such as ethanol and isopropanol; polyols and polyol ethers such as 2-butoxyethanol, hexylene glycol, propylene glycol, dipropylene glycol, propylene glycol monomethyl ether, diethylene glycol monoethyl ether and monomethyl ether, glycerol as well as aromatic alcohols such as benzyl alcohol, benzyloxyethanol or phenoxyethanol, and mixtures thereof. The additional solvent or solvents may be present in proportions ranging preferably from 0.1 to 40% by weight relative to the total weight of the dyeing composition, and still more preferably from 5 to 30% by weight. It should be noted that the amount of water in the composition according to the invention is preferably greater than 10% by weight relative to the weight of the composition, and more preferably greater than or equal to 25% by weight. Preferably, the water content is between 25 and 98% by weight relative to the weight of the composition.

The pH of the composition according to the invention can be between 2 and 13. It is preferably between 2 and 11, more preferably it is less than 7 and better between 2 and 6. It can be adjusted to the desired value. by means of one or more acidifying agents or one or more basifying agents usually used in the field. Among the acidifying agents, mention may be made, for example, of mineral or organic acids such as hydrochloric acid, orthophosphoric acid, sulfuric acid, carboxylic acids such as acetic acid, tartaric acid citric acid, lactic acid, sulphonic acids.

Among the alkalinizing agents that may be mentioned, for example, alkaline carbonates, alkanolamines such as mono-, di- and triethanolamines and their derivatives, hydroxides of sodium or potassium and compounds of the following formula: Rx In which W is a propylene residue optionally substituted by a hydroxyl group or a C1-C6 alkyl radical; Rx, Ry, Rz and Rt, which may be identical or different, represent a hydrogen atom, a C1-C6 alkyl radical or a C1-C6 hydroxyalkyl radical.

The composition according to the invention may also comprise one or more oxidizing agents. In this case, we speak of ready-to-use compositions. In particular, the ready-to-use composition is obtained by extemporaneous mixing, prior to application, of a composition previously described, with at least one composition comprising one or more oxidizing agents. The oxidizing agent is preferably chosen from hydrogen peroxide, urea peroxide, alkali metal bromates or ferricyanides, peroxygenated salts such as, for example, persulfates, perborates and alkali or alkaline earth metal percarbonates. like sodium, potassium, magnesium. The use of hydrogen peroxide is particularly preferred. This oxidizing agent is advantageously constituted by hydrogen peroxide in aqueous solution (hydrogen peroxide), the titre of which may vary, more particularly, from 1 to 40 volumes, and even more preferably from 5 to 40 volumes.

The compositions according to the invention can result from the extemporaneous mixing of several compositions. Another object of the invention is therefore constituted by a process for dyeing keratinous fibers, which consists in applying the composition described above. According to a first embodiment, the composition applied does not comprise an oxidizing agent. This embodiment is appropriate especially in the case where the composition does not include oxidation dye precursor (bases, coupler). According to a second embodiment, the composition is applied in the presence of at least one oxidizing agent.

This embodiment can be implemented if the composition comprises, as dyestuffs, only natural dyes and optionally one or more additional direct dyes for synthesis, or even if the composition comprises one or more natural dyes, optionally one or additional direct synthetic dyes combined with one or more oxidation dye precursors (base / coupler).

According to a first variant of this embodiment, the ready-to-use composition which has just been detailed and which is obtained by extemporaneous mixing before application of a composition according to the invention without oxidizing agent with an oxidizing composition. According to a second variant of this embodiment, the composition according to the invention is applied without oxidizing agent, and an oxidizing composition, successively and without intermediate rinsing.

The oxidizing composition used comprises one or more oxidizing agents as defined above. Regarding the organic solvents possibly present in the oxidizing composition, reference may be made to the list indicated previously in the context of the description of the composition according to the invention. It should be noted that the organic solvent may also be the one or more monohydroxylated alcohols mentioned above. Usually, the pH of the oxidizing composition is less than 7. The oxidizing composition may be in the form of a solution, an emulsion or a gel. It may optionally comprise one or more additives conventionally used in the field of human keratin fiber staining, depending on the desired dosage form. We can again refer to the list of additives given above.

Whatever the embodiment chosen (with or without an oxidant), the mixture applied to the fibers is left in place for a duration, in general, of the order of 1 minute to 1 hour, preferably of 10 minutes to 30 minutes. minutes. The temperature during the process is conventionally between 10 and 200 ° C. and more particularly between room temperature (between 15 and 25 ° C.) and 80 ° C., preferably between room temperature and 60 ° C. At the end of the treatment, the human keratinous fibers are optionally rinsed with water, washed with shampoo, rinsed again with water and then dried or left to dry. Preferably human keratin fibers are hair.

Concrete but non-limiting examples of the invention will now be presented. EXAMPLES The following compositions A, B, C and D are prepared (the proportions are given in% by weight): ABCD Decanol 5% - - - Octanol - 5 % - - Heptanol - - 5% - Hexanol 5% Disperse Red 13 0.5% Ethanol 15% Sodium lauryl sulphate 2% Active matter Perfume qs Water qs 100 0/0 Each composition is then applied to strands of hair at 90% natural white hair. The application time is 20 minutes at room temperature. At the end of this break time, the locks are dewatered, rinsed, shampooed and dried.

It can be seen that the compositions in accordance with the invention make it possible to obtain intense, stubborn and homogeneous colorations. If the monohydroxy alcohols of the invention are replaced by ethanol, the dyeing performance is very much lower. 26 15

Claims (14)

REVENDICATIONS1. A dye composition comprising, in a cosmetically acceptable medium, one or more synthetic direct dyes of LogP greater than or equal to 2, and one or more aliphatic monohydroxyl alcohols containing a linear C5-C12 alkyl chain. 2. Composition according to the preceding claim, characterized in that the monohydroxyl alcohol or alcohols contain a linear C6-C10 alkyl chain. 3. Composition according to the preceding claim, characterized in that the monohydroxyl alcohol or alcohols contain a linear C6-C10 alkyl chain. 4. Composition according to any one of the preceding claims, characterized in that the monohydoxylated alcohols are of formula R-OH, R denoting a linear C5-C12 alkyl chain. 5. Composition according to any one of the preceding claims, characterized in that the monohydroxy alcohol is n-decanol. 6. Composition according to any one of the preceding claims, characterized in that the content of monohydroxylated alcohol (s) represents from 0.1 to 50% by weight, and preferably from 0.1 to 30% by weight. relative to the weight of the composition. 25 7. Composition according to any one of the preceding claims, characterized in that the synthetic direct dye (s) of LogP greater than or equal to 2 are dyes chosen from: Dye Chemical structure IogP Disperse Red 17 OH 3.69 02N N 'NN OH Disperse Purple 1 t NH2 3.0 O NH2 O HC Yellow 7 OH 2.38 H2N NN OH 10 20Disperse Blue 377 Î HN 3.21 / OH O HH Disperse Red 13 NN ~ 5.22 02N HO CI Disperse Green 9 NO, 4.23 I \ NN 02N s HN o Solvent Black 3 NN "H 7.50 Disperse Blue 148 NO2 4.81 N, \ o ~ Disperse Violet 63 'N 5.30 02N N HN CN O CI Disperse Blue 60 O NHz O 3.38, O NH O ~ O z Disperse Blue 14 O HN 4.25, O HN Solvent Orange 15 H 3.90 HO \ Solvent Orange 7 4.40 Blue 14 ' 8.18 Y HSolvent O HDisperse 3.68 Yellow 82 * 20 8. Composition according to any one of the preceding claims, characterized in that the direct synthetic dye (s) content of LogP greater than or equal to 2 varies from 0.001 to 15. % by weight, preferably from 0.01 to 10% by weight, relative to the weight of the composition. 9. Composition according to any one of the preceding claims, characterized in that it comprises at least one additional dye different from the hydrophobic direct dyes, chosen from natural dyes, synthetic direct dyes of LogP less than 2, dye precursors. oxidation, or combinations thereof. 10. Composition according to any one of the preceding claims, characterized in that it comprises water and optionally one or more additional organic solvents different from aliphatic monohydroxyl alcohols containing a C5-C12 linear alkyl chain. 11. Composition according to any one of the preceding claims, characterized in that it comprises one or more organic thickening agents, preferably polymeric, and / or one or more surfactants. 12. Composition according to any one of the preceding claims, characterized in that it comprises one or more oxidizing agents. 13. A dyeing method comprising applying to human keratin fibers a composition according to any one of the preceding claims. 14. Multi-compartment device comprising at least one composition according to any one of claims 1 to 11 and an oxidizing composition comprising one or more oxidizing agents.