US20040088800A1

US20040088800A1 - Composition for the oxidation dyeing of keratinous fibres comprising a diamino pyrazole and a carbonyl compound

Info

Publication number: US20040088800A1
Application number: US10/451,553
Authority: US
Inventors: Jean Cotteret
Original assignee: LOreal SA
Current assignee: LOreal SA
Priority date: 2000-12-22
Filing date: 2001-11-26
Publication date: 2004-05-13
Also published as: FR2818538B1; DE60120477T2; FR2818538A1; US7951209B2; JP2004519446A; EP1345580A1; EP1345580B1; ES2266103T3; WO2002051373A1; EP1345580B9; ATE328647T1; US20080141468A1; DE60120477D1

Abstract

The present invention relates to a composition for the oxidation dyeing of keratin fibres, in particular of human keratin fibres such as the hair, comprising at least one oxidation base chosen from 4,5- or 3,4-diaminopyrazoles and triaminopyrazoles, in combination with at least one selected carbonyl compound, and also to the dyeing process using this composition with an oxidizing agent.

Description

It is known practice to dye keratin fibres, and in particular human hair, with dye compositions containing oxidation dye precursors, in particular ortho- or para-phenylenediamines, ortho- or para-aminophenols or heterocyclic compounds such as pyrazole derivatives which are generally referred to as oxidation bases. Oxidation dye precursors, or oxidation bases, are colourless or weakly coloured compounds which, when combined with oxidizing products, can give rise to coloured compounds and dyes by a process of oxidative condensation.

It is also known that the shades obtained with these oxidation bases can be varied by combining them with suitably selected couplers or coloration modifiers, the latter being chosen in particular from aromatic meta-diamines, meta-aminophenols, meta-diphenols and certain heterocyclic compounds.

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

The “permanent” coloration obtained by means of these oxidation dyes must moreover satisfy a certain number of requirements. Thus it must not have any toxicological disadvantages, it must be able to give shades of the desired intensity and it must be able to withstand external agents (light, bad weather, washing, permanent-waving, perspiration, rubbing).

The dyes must also be able to cover white hair and, lastly, they must be as unselective as possible, i.e. they must give the smallest possible colour differences along the same length of keratin fibre, which may in fact be differently sensitized (i.e. damaged) between its end and its root.

Compositions for the oxidation dyeing of keratin fibres, containing pyrazole derivatives such as 4,5-diaminopyrazoles, 3,4-diaminopyrazoles or 3,4,5-triaminopyrazoles as oxidation base have already been proposed, especially in German patent applications DE 3 843 892, DE 4 234 887, DE 4 234 886, DE 4 234 885 or DE 195 43 988,. However, such compositions are not entirely satisfactory since, during the dyeing processes, side reactions take place that can have adverse effects in terms of the harmlessness and of the dyeing properties obtained, and especially the strength and resistance of the colorations with respect to the various attacking factors to which the hair may be subjected.

The invention is aimed at developing novel dye compositions that do not have the drawbacks of the dyes of the prior art, in particular strong dyes that are particularly resistant to the various attacking factors to which the hair may be subjected, and which show good harmlessness.

To this end, one subject of the invention is a composition for the oxidation dyeing of human keratin fibres, and in particular of human keratin fibres such as the hair, comprising, in a medium that is suitable for dyeing:

at least one oxidation base chosen from 4,5- or 3,4-diaminopyrazoles and triaminopyrazoles,

at least one carbonyl compound selected from the compounds of formulae (I), (II) and (III) and the polyimides

in which

R ₁, R₁′, R₂and R₂′ denote, independently of each other, a hydrogen atom; a saturated or unsaturated aliphatic hydrocarbon-based chain containing from 1 to 30 carbon atoms, which may be interrupted with one or more hetero atoms or with one or more carbonyl groups, which is unsubstituted or substituted with one or more groups chosen from hydroxyl, C₁-C₄alkoxy, amino, carboxyl, C₁-C₁₀alkoxycarbonyl, halogen, nitro, mono- or di(C₁-C₄)alkylamino, mono- or dihydroxy(C₁-C₄)alkylamino or C₆-C₂₀aryl groups; a C₆-C₂₀aryl group, which is unsubstituted or substituted with one or more groups chosen from hydroxyl, amino, nitro, halogen, carboxyl, (C₁-C₁₀)alkoxycarbonyl, C₁-C₄alkyl, mono- or polyhydroxy(C₁-C₄)alkyl, C₁-C₄alkoxy, mono- or di(C₁-C₄)alkylamino or mono- or dihydroxy(C₁-C₄)alkylamino groups,

x denotes 0 or 1, and, when x is equal to 0, R ₁and R₂can form, together with the C═O group, a saturated ring optionally fused to one or more benzene nuclei that may be substituted with one or more C₁-C₁₀alkyl, C₁-C₁₀alkoxy, carboxyl or C₁-C₁₀alkoxycarbonyl radicals,

in which:

B denotes a saturated or unsaturated aliphatic hydrocarbon-based chain containing from 1 to 30 carbon atoms, which may be interrupted with one or more hetero atoms or with one or more carbonyl groups, which is unsubstituted or substituted with one or more groups chosen from hydroxyl, C ₁-C₄alkoxy, amino, carboxyl, C₁-C₁₀alkoxycarbonyl, halogen, nitro, mono- or di(C₁-C₄)alkylamino, mono- or dihydroxy(C₁-C₄)alkyl-amino or C₆-C₂₀aryl groups; a C₆-C₂₀aryl group, which is unsubstituted or substituted with one or more groups chosen from hydroxyl, amino, nitro, halogen, carboxyl, (C₁-C₁₀)alkoxy-carbonyl, C₁-C₄alkyl, mono- or polyhydroxy(C₁-C₄)alkyl, C₁-C₄alkoxy, mono- or di(C₁-C₄)alkyl-amino or mono- or dihydroxy(C₁-C₄)alkylamino groups,

R ₃and R₄, which may be identical or different, represent a hydrogen atom, a C₁-C₁₀alkyl, C₁-C₁₀monohydroxyalkyl or C₂-C₁₀polyhydroxyalkyl radical, Na, K or NH₄.

The oxidation dye composition of the invention makes it possible to obtain, with good harmlessness, strong, relatively unselective colorations in varied shades, which show excellent resistance properties both with respect to atmospheric agents such as light and bad weather and with respect to perspiration and various treatments to which the hair may be subjected (shampooing or permanent reshaping).

Except where otherwise mentioned, all the radicals, substituents, groups and chains in the context of the invention are linear or branched, and substituted or unsubstituted.

Among the compounds of formula (I) above that may be mentioned are urea, aliphatic aldehydes or ketones, for instance acetone, aromatic aldehydes or ketones, for instance p-dimethylaminobenzaldehyde or 5-nitrosalicylaldehyde, β-dicarbonyl compounds, for instance α,α-dimethylacetylacetone, γ-pyrones such as 2,6-dimethylpyrone, 2,6-di(ethoxycarbonyl)pyrone and 2-hydroxy-6-methylpyrone, chromones, for instance 2-methylchromone, aldoses or ketoses such as glyceraldehyde, dihydroxyacetone, D-glucose, D-fructose, D-erythrose, D-ribose, D-xylose, D-threose, D-erythrulose and D-sorbose.

Among the compounds of formula (II) above that may be mentioned is maleic acid.

Among the compounds of formula (III) above that may be mentioned is maleic anhydride.

The polyimides are polycondensates derived from tetraacids (or from dianhydrides) and from diamines. Preferably, among these, aromatic polyimides are used. An example that may be mentioned is the polyimides obtained from pyromellitic dianhydride or benzophenone dianhydride. Mention may be made most particularly of the products derived from pyromellitic dianhydride and from 4,4′-diaminodiphenyl ether (Kapton H from the company DuPont).

Among the carbonyl compounds of the invention that are preferably used are urea, aliphatic or aromatic ketones, maleic acid, ketoses or aldoses.

The carbonyl compound(s) in accordance with the invention preferably represent(s) from 0.00001% to 10% by weight and even more preferably from 0.001% to 5% by weight approximately relative to the total weight of the dye composition, and even more preferentially from 0.001% to 3% by weight approximately relative to this weight.

Among the 4,5- or 3,4-diaminopyrazoles that are useful in the dye compositions of the invention, mention may be made particularly of the diamino-pyrazoles chosen from the 4,5- or 3,4-diaminopyrazoles of formula (IV) or (V) below, and/or the addition salts thereof with an acid:

in which:

R ₅, R₆, R₇, R₈and R₉, which may be identical or different, represent a hydrogen atom; a C₁-C₆alkyl radical which is unsubstituted or substituted with at least one substituent chosen from OR, NHR, NRR′, SR, SOR, SO₂R, COR, COOH, CONH₂, CONHR, CONRR′, PO(OH)₂, SH and SO₃X, a non-cationic heterocycle, Cl, Br or I, X denoting a hydrogen atom, Na, K or NH₄, and R and R′, which may be identical or different, representing a C₁-C₄alkyl or alkenyl; a C₂-C₄hydroxyalkyl radical; a C₂-C₄aminoalkyl radical; a phenyl radical; a phenyl radical substituted with a halogen atom or a C₁-C₄alkyl, C₁-C₄alkoxy, nitro, trifluoromethyl, amino or C₁-C₄alkylamino radical; a benzyl radical; a benzyl radical substituted with a halogen atom or with a C₁-C₄alkyl, C₁-C₄alkoxy, methylenedioxy or amino radical; a radical

in which m and n are integers, which may be identical or different, between 0 and 3 inclusive, X represents an oxygen atom or an NH group, Y represents a hydrogen atom or a C ₁-C₄alkyl radical, and Z represents a methyl radical when n is equal to 0, or Z represents a C₁-C₄alkyl radical, a group OR or NR″R′″ when n is greater than or equal to 1, R″ and R′″, which may be identical or different, denoting a hydrogen atom or a C₁-C₄alkyl radical; or R₉forms with the nitrogen atom of the group NR₇R₈in position 5 an at least 4-membered heterocycle,

R ₁₀represents a C₁-C₆alkyl radical; a C₁-C₄hydroxy-alkyl radical; a C₁-C₄aminoalkyl radical; a (C₁-C₄)-alkylamino(C₁-C₄)alkyl radical; a di(C₁-C₄)alkylamino-(C₁-C₄)alkyl radical; a hydroxy(C₁-C₄)alkylamino(C₁-C₄)-alkyl radical; a (C₁-C₄)alkoxymethyl radical; a phenyl radical; a phenyl radical substituted with a halogen atom or with a C₁-C₄alkyl, C₁-C₄alkoxy, nitro, trifluoromethyl, amino or C₁-C₄alkylamino radical; a benzyl radical; a benzyl radical substituted with a halogen atom or with a C₁-C₄alkyl, C₁-C₄alkoxy, nitro, trifluoromethyl, amino or C₁-C₄alkylamino radical; a heterocycle chosen from thiophene, furan and pyridine, or a radical —(CH₂)_p—O—(CH₂)_q—OR″, in which p and q are integers, which may be identical or different, between 1 and 3 inclusive and R″ is as defined above, it being understood that:

at least one of the radicals R ₅, R₆, R₇and R₈represents a hydrogen atom.

Among the triaminopyrazoles that are useful as oxidation bases in the dye compositions in accordance with the invention, mention may be made more particularly of the compounds of formula (VI) below, and the addition salts thereof with an acid:

in which:

R ₁₁and R₁₂, which may be identical or different, represent a hydrogen atom or a C₁-C₄alkyl or C₂-C₄hydroxyalkyl radical.

Among the 4,5- or 3,4-diaminopyrazoles of formula (IV) above that may be mentioned more particularly are 4,5-diamino-1-(4′-methoxybenzyl)-pyrazole, 4,5-diamino-1-(4′-methylbenzyl)pyrazole, 4,5-diamino-1-(4′-chlorobenzyl)pyrazole, 4,5-diamino-1-(3′-methoxybenzyl)pyrazole, 4-amino-1-(4′-methoxy-benzyl)-5-methylaminopyrazole, 4-amino-5-(β-hydroxy-ethyl)amino-1-(4′-methoxybenzyl)pyrazole, 4-amino-5-(β-hydroxyethyl)amino-1-methylpyrazole, 4-amino-(3)-5-methylaminopyrazole, 3-(5),4-diaminopyrazole, 4,5-diamino-1-methylpyrazole, 4,5-diamino-1-ethyl-pyrazole, 4,5-diamino-1-isopropylpyrazole, 4,5-diamino-1-hydroxyethylpyrazole, 4,5-diamino-1-benzylpyrazole, 4-diamino-5-hydroxyethylamino-1-hydroxyethylpyrazole, 4-diamino-5-methylamino-1-hydroxyethylpyrazole, 3-amino-4,5,7,8-tetrahydropyrazolo[1,5-a]pyrimidine, 7-amino-2,3-dihydro-1H-imidazole[1,2-b]pyrazole, 3-amino-8-methyl-4,5,7,8-tetrahydropyrazolo[1,5-a]-pyrimidine, 2-(4,5-diamino-1-pyrazolyl)-1-ethane-sulphonic acid, 2-(4,5-diamino-1-pyrazolyl)acetamide, 2-(4,5-diamino-1-pyrazolyl)acetic acid, 2-(2-di-methylaminoethyl)-2H-pyrazole-3,4-diamine and 2-(2-methoxyethyl)-2H-pyrazole-3,4-diamine, and the addition salts thereof with an acid.

The diaminopyrazoles that are useful in the present invention may be obtained via synthetic processes that are well known to those skilled in the art. For example, the 4,5-diaminopyrazoles of formula (V) may be prepared according to the synthetic process as described, for example, in French patent application FR-A-2 733 749.

Among the 4,5-diaminopyrazoles of formula (V) above that may be mentioned more particularly are:

1-benzyl-4,5-diamino-3-methylpyrazole,

4,5-diamino-1-(β-hydroxyethyl)-3-(4′-methoxyphenyl)-pyrazole,

4,5-diamino-1-(β-hydroxyethyl)-3-(4′-methylphenyl)-pyrazole,

4,5-diamino-1-(β-hydroxyethyl)-3-(3′-methylphenyl)-pyrazole,

4,5-diamino-3-methyl-1-isopropylpyrazole,

4,5-diamino-3-(4′-methoxyphenyl)-1-isopropylpyrazole,

4,5-diamino-1-ethyl-3-methylpyrazole,

4,5-diamino-1-ethyl-3-(4′-methoxyphenyl)pyrazole,

4,5-diamino-3-hydroxymethyl-1-methylpyrazole,

4,5-diamino-1-ethyl-3-hydroxymethylpyrazole,

4,5-diamino-3-hydroxymethyl-1-isopropylpyrazole,

4,5-diamino-3-hydroxymethyl-1-tert-butylpyrazole,

4,5-diamino-3-hydroxymethyl-1-phenylpyrazole,

4,5-diamino-3-hydroxymethyl-1-(2′-methoxyphenyl)-pyrazole,

4,5-diamino-3-hydroxymethyl-1-(3′-methoxyphenyl)-pyrazole,

4,5-diamino-3-hydroxymethyl-1-(4′-methoxyphenyl)-pyrazole,

1-benzyl-4,5-diamino-3-hydroxymethylpyrazole,

4,5-diamino-3-methyl-1-(2′-methoxyphenyl)pyrazole,

4,5-diamino-3-methyl-1-(3′-methoxyphenyl)pyrazole,

4,5-diamino-3-methyl-1-(4′-methoxyphenyl)pyrazole,

3-aminomethyl-4,5-diamino-1-methylpyrazole,

3-aminomethyl-4,5-diamino-1-ethylpyrazole,

3-aminomethyl-4,5-diamino-1-isopropylpyrazole,

3-aminomethyl-4,5-diamino-1-tert-butylpyrazole,

4,5-diamino-3-dimethylaminomethyl-1-methylpyrazole,

4,5-diamino-3-dimethylaminomethyl-1-ethylpyrazole,

4,5-diamino-3-dimethylaminomethyl-1-isopropyl-pyrazole,

4,5-diamino-3-dimethylaminomethyl-1-tert-butyl-pyrazole,

4,5-diamino-3-ethylaminomethyl-1-methylpyrazole,

4,5-diamino-3-ethylaminomethyl-1-ethylpyrazole,

4,5-diamino-3-ethylaminomethyl-1-isopropylpyrazole,

4,5-diamino-3-ethylaminomethyl-1-tert-butylpyrazole,

4,5-diamino-3-methylaminomethyl-1-methylpyrazole,

4,5-diamino-3-methylaminomethyl-1-isopropylpyrazole,

4,5-diamino-1-ethyl-3-methylaminomethylpyrazole,

1-tert-butyl-4,5-diamino-3-methylaminomethylpyrazole,

4,5-diamino-3-[(β-hydroxyethyl)aminomethyl)-1-methyl-pyrazole,

4,5-diamino-3-[(β-hydroxyethyl)aminomethyl]-1-iso-propylpyrazole,

4,5-diamino-1-ethyl-3-[(β-hydroxyethyl)aminomethyl]-pyrazole,

1-tert-butyl-4,5-diamino-3-[(β-hydroxyethyl)amino-methyl]pyrazole,

4-amino-5-(β-hydroxyethyl)amino-1,3-dimethylpyrazole,

4-amino-5-(β-hydroxyethyl)amino-1-isopropyl-3-methyl-pyrazole,

4-amino-5-(β-hydroxyethyl)amino-1-ethyl-3-methyl-pyrazole,

4-amino-5-(β-hydroxyethyl)amino-1-tert-butyl-3-methylpyrazole,

4-amino-5-(β-hydroxyethyl)amino-1-phenyl-3-methyl-pyrazole,

4-amino-5-(β-hydroxyethyl)amino-1-(2-methoxyphenyl)-3-methylpyrazole,

4-amino-5-(β-hydroxyethyl)amino-1-(3-methoxyphenyl)-3-methylpyrazole,

4-amino-5-(β-hydroxyethyl)amino-1-(4-methoxyphenyl)-3-methylpyrazole,

4-amino-5-(β-hydroxyethyl)amino-1-benzyl-3-methyl-pyrazole,

4-amino-1-ethyl-3-methyl-5-methylaminopyrazole,

4-amino-1-tert-butyl-3-methyl-5-methylaminopyrazole,

4,5-diamino-1,3-dimethylpyrazole,

4,5-diamino-3-tert-butyl-1-methylpyrazole,

4,5-diamino-1-tert-butyl-3-methylpyrazole,

4,5-diamino-1-methyl-3-phenylpyrazole,

4,5-diamino-1-(β-hydroxyethyl)-3-methylpyrazole,

4,5-diamino-1-(β-hydroxyethyl)-3-phenylpyrazole,

4,5-diamino-1-methyl-3-(2′-chlorophenyl)pyrazole,

4,5-diamino-1-methyl-3-(4′-chlorophenyl)pyrazole,

4,5-diamino-1-methyl-3-(3′-trifluoromethylphenyl)-pyrazole,

4,5-diamino-1,3-diphenylpyrazole,

4,5-diamino-3-methyl-1-phenylpyrazole,

4-amino-1,3-dimethyl-5-phenylaminopyrazole,

4-amino-1-ethyl-3-methyl-5-phenylaminopyrazole,

4-amino-1,3-dimethyl-5-methylaminopyrazole,

4-amino-3-methyl-1-isopropyl-5-methylaminopyrazole,

4-amino-3-isobutoxymethyl-1-methyl-5-methylamino-pyrazole,

4-amino-3-methoxyethoxymethyl-1-methyl-5-methylamino-pyrazole,

4-amino-3-hydroxymethyl-1-methyl-5-methylamino-pyrazole,

4-amino-1,3-diphenyl-5-phenylaminopyrazole,

4-amino-3-methyl-5-methylamino-1-phenylpyrazole,

4-amino-1,3-dimethyl-5-hydrazinopyrazole,

5-amino-3-methyl-4-methylamino-1-phenylpyrazole,

5-amino-1-methyl-4-(N,N-methylphenyl)amino-3-(4′-chlorophenyl)pyrazole,

5-amino-3-ethyl-1-methyl-4-(N,N-methylphenyl)amino-pyrazole,

5-amino-1-methyl-4-(N,N-methylphenyl)amino-3-phenyl-pyrazole,

5-amino-3-ethyl-4-(N,N-methylphenyl)aminopyrazole,

5-amino-4-(N,N-methylphenyl)amino-3-phenylpyrazole,

5-amino-4-(N,N-methylphenyl)amino-3-(4′-methylphenyl)-pyrazole,

5-amino-3-(4′-chlorophenyl)-4-(N,N-methylphenyl)-aminopyrazole,

5-amino-3-(4′-methoxyphenyl)-4-(N,N-methylphenyl)-aminopyrazole,

4-amino-5-methylamino-3-phenylpyrazole,

4-amino-5-ethylamino-3-phenylpyrazole,

4-amino-5-ethylamino-3-(4′-methylphenyl)pyrazole,

4-amino-3-phenyl-5-propylaminopyrazole,

4-amino-5-butylamino-3-phenylpyrazole,

4-amino-3-phenyl-5-phenylaminopyrazole,

4-amino-5-benzylamino-3-phenylpyrazole,

4-amino-5-(4′-chlorophenyl)amino-3-phenylpyrazole,

4-amino-3-(4′-chlorophenyl)-5-phenylaminopyrazole,

4-amino-3-(4′-methoxyphenyl)-5-phenylaminopyrazole,

1-(4′-chlorobenzyl)-4,5-diamino-3-methylpyrazole,

4,5-diamino-3-hydroxymethyl-1-isopropylpyrazole,

4-amino-1-ethyl-3-methyl-5-methylaminopyrazole,

4-amino-5-(2′-aminoethyl)amino-1,3-dimethylpyrazole, and the addition salts thereof with an acid.

Among the 4,5- or 3,4-diaminopyrazoles of formula (IV) above, the following are more particularly preferred:

4,5-diamino-1-benzylpyrazole,

4,5-diamino-1-(4′-chlorobenzyl)pyrazole,

4,5-diamino-1-methylpyrazole,

4,5-diamino-1-hydroxyethylpyrazole,

2-(2-methoxyethyl)-2H-pyrazole-3,4-diamine and the addition salts thereof with an acid.

Among the 4,5-diaminopyrazoles of formula (V) above, the following are more particularly preferred:

4,5-diamino-1,3-dimethylpyrazole,

4,5-diamino-3-methyl-1-phenylpyrazole,

4,5-diamino-1-methyl-3-phenylpyrazole,

4-amino-1,3-dimethyl-5-hydrazinopyrazole,

1-benzyl-4,5-diamino-3-methylpyrazole,

4,5-diamino-3-tert-butyl-1-methylpyrazole,

4,5-diamino-1-tert-butyl-3-methylpyrazole,

4,5-diamino-1-(β-hydroxyethyl)-3-methylpyrazole,

4,5-diamino-1-ethyl-3-methylpyrazole,

4,5-diamino-1-ethyl-3-(4′-methoxyphenyl)pyrazole,

4,5-diamino-1-ethyl-3-hydroxymethylpyrazole,

4,5-diamino-3-hydroxymethyl-1-methylpyrazole,

4,5-diamino-3-hydroxymethyl-1-isopropylpyrazole,

4,5-diamino-3-methyl-1-isopropylpyrazole,

Among the triaminopyrazoles of formula (VI) above that may be mentioned more particularly are 3,4,5-triaminopyrazole, 1-methyl-3,4,5-triamino-pyrazole, 3,5-diamino-1-methyl-4-methylaminopyrazole and 3,5-diamino-4-(β-hydroxyethyl)amino-1-methyl-pyrazole, and the additions salts thereof with an acid.

The 4,5- or 3,4-diaminopyrazole(s) and/or the triaminopyrazole(s) in accordance with the invention and/or the corresponding addition salt(s) with an acid preferably represent from 0.0005% to 12% by weight approximately relative to the total weight of the dye composition and more preferably from 0.005% to 6% by weight approximately relative to this weight.

Preferably, the weight ratio of the carbonyl compound(s) to the 4,5- or 3,4-diaminopyrazole(s) and/or the triaminopyrazole(s) and/or the addition salt(s) with an acid is between 0.001 and 100 and even more preferably between 0.01 and 10.

The dye compositions in accordance with the invention preferably contain at least one coupler. The couplers that may be used are those conventionally used for oxidation dyeing, and especially meta-phenylene-diamines, meta-aminophenols, meta-diphenols, naphthol derivatives and heterocyclic couplers.

The meta-phenylenediamines, meta-aminophenols and meta-diphenols which may be used as additional couplers in the dye composition in accordance with the invention are preferably chosen from the compounds corresponding to formula (1) below, and the addition salts thereof with an acid:

in which:

A and B, which may be identical or different, represent a hydroxyl, amino or —NHR ₂₂radical in which R₂₂represents a C₁-C₄alkyl, C₁-C₄monohydroxy-alkyl or C₂-C₄polyhydroxyalkyl radical,

R ₁₉, R₂₀and R₂₁, which may be identical or different, represent a hydrogen atom or a halogen atom such as a bromine, chlorine, iodine or fluorine atom, or a C₁-C₄alkyl, C₁-C₄alkoxy, C₁-C₄monohydroxyalkyl, C₂-C₄polyhydroxyalkyl, C₁-C₄monohydroxyalkoxy or C₂-C₄polyhydroxyalkoxy radical.

Among the compounds of formula (1) above, mention may be made in particular of 2-methyl-5-aminophenol, 2-methyl-5-amino-6-chlorophenol, 5-N-(β-hydroxyethyl)amino-2-methylphenol, 3-aminophenol, 1,3-dihydroxybenzene, 1,3-dihydroxy-2-methylbenzene, 4-chloro-1,3-dihydroxybenzene, 2,4-diamino-1-(β-hydroxyethyloxy)benzene, 2-amino-4-(β-hydroxyethyl-amino)-1-methoxybenzene, 1,3-diaminobenzene and 2,6-bis(β-hydroxyethylamino)toluene, and the addition salts thereof with an acid.

The heterocyclic coupler(s) which may be used as additional couplers in the dye composition in accordance with the invention can be chosen in particular from indole derivatives, indoline derivatives, pyridine derivatives, pyrimidine derivatives and pyrazolones, and the addition salts thereof with an acid.

Among these heterocyclic couplers, mention may be made in particular, for example, of sesamol, 1-N-(β-hydroxyethyl)amino-3′,4-methylenedioxybenzene, 6-hydroxyindole, 4-hydroxyindole, 4-hydroxy-N-methyl-indole, 6-hydroxyindoline, 6-hydroxybenzomorpholine, 2,6-dihydroxy-4-methylpyridine, 3,5-diamino-2,6-di-methoxypyridine, 2-amino-3-hydroxypyridine, 1-H-3-methylpyrazol-5-one and 1-phenyl-3-methylpyrazol-5-one, and the addition salts thereof with an acid.

Among the naphthol derivatives that may be mentioned are α-naphthol and 2-methyl-1-naphthol.

The additional coupler(s) preferably represent(s) from 0.0001% to 10% by weight approximately relative to the total weight of the dye composition, and even more preferably from 0.005% to 5% by weight approximately relative to this weight.

The dye compositions in accordance with the invention may also contain other oxidation bases conventionally used for oxidation dyeing, other than a diaminopyrazole and a triaminopyrazole and/or direct dyes, especially to modify the shades or to enrich them with glints.

The additional oxidation bases that may be used in the context of the present invention are chosen from those conventionally known in oxidation dyeing, and among which mention may be made especially of ortho- and para-phenylenediamines, double bases, ortho- and para-aminophenols, and heterocyclic bases other than the pyrazoles of the invention, and also the addition salts thereof with an acid, and especially:

(I) the para-phenylenediamines of formula (2) below, and the addition salts thereof with an acid:

in which:

R _arepresents a hydrogen atom, a C₁-C₄alkyl radical, a C₁-C₄monohydroxyalkyl radical, a C₂-C₄polyhydroxy-alkyl radical, a (C₁-C₄)alkoxy(C₁-C₄)alkyl radical, a C₁-C₄alkyl radical substituted with a nitrogenous group, a phenyl radical or a 4′-aminophenyl radical;

R _brepresents a hydrogen atom, a C₁-C₄alkyl radical, a C₁-C₄monohydroxyalkyl radical, a C₂-C₄polyhydroxy-alkyl radical, a (C₁-C₄)alkoxy(C₁-C₄)alkyl radical or a C₁-C₄alkyl radical substituted with a nitrogenous group;

R _crepresents a hydrogen atom, a halogen atom such as a chlorine atom, a C₁-C₄alkyl radical, a sulfo radical, a carboxyl radical, a C₁-C₄monohydroxyalkyl radical, a C₁-C₄hydroxyalkoxy radical, an acetylamino(C₁-C₄)-alkoxy radical, a C₁-C₄mesylaminoalkoxy radical or a carbamoylamino(C₁-C₄) alkoxy radical,

R _drepresents a hydrogen or halogen atom or a C₁-C₄alkyl radical,

R _aand R_bmay also form with the nitrogen atom that bears them a 5- or 6-membered nitrogenous heterocycle optionally substituted with one or more alkyl, hydroxyl or ureido groups.

Among the nitrogenous groups of formula (2) above, mention may be made in particular of amino, mono(C ₁-C₄)alkylamino, di(C₁-C₄)alkylamino, tri(C₁-C₄)-alkylamino, monohydroxy(C₁-C₄)alkylamino, imidazolinium and ammonium radicals.

Among the para-phenylenediamines of formula (2) above, mention may be made more particularly of para-phenylenediamine, para-tolylenediamine, 2-chloro-para-phenylenediamine, 2,3-dimethyl-para-phenylene-diamine, 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-amino-N,N-bis(β-hydroxyethyl)-3-methylaniline, 4-amino-3-chloro-N,N-bis(β-hydroxyethyl)aniline, 2-β-hydroxy-ethyl-para-phenylenediamine, 2-fluoro-para-phenylene-diamine, 2-isopropyl-para-phenylenediamine, N-(β-hydroxypropyl)-para-phenylenediamine, 2-hydroxy-methyl-para-phenylenediamine, N,N-dimethyl-3-methyl-para-phenylenediamine, N,N-(ethyl-β-hydroxyethyl)-para-phenylenediamine, N-(β,γ-dihydroxypropyl)-para-phenylenediamine, N-(4′-aminophenyl)-para-phenylene-diamine, N-phenyl-para-phenylenediamine and 2-β-hydroxyethyloxy-para-phenylenediamine, and the addition salts thereof with an acid.

Among the para-phenylenediamines of formula (2) above, para-phenylenediamine, para-tolylenediamine, 2-isopropyl-para-phenylenediamine, 2-β-hydroxyethyl-para-phenylenediamine, 2-β-hydroxyethyloxy-para-phenylenediamine, 2,6-dimethyl-para-phenylenediamine, 2,6-diethyl-para-phenylenediamine, 2,3-dimethyl-para-phenylenediamine, N,N-bis(β-hydroxyethyl)-para-phenylenediamine and 2-chloro-para-phenylenediamine, and the addition salts thereof with an acid are most particularly preferred.

(II) the double bases are compounds comprising at least two aromatic nuclei bearing amino and/or hydroxyl groups.

Among the double bases which can be used as oxidation bases in the dye compositions in accordance with the invention, mention may be made in particular of the compounds corresponding to formula (3) below, and the addition salts thereof with an acid:

in which:

Z ₁and Z₂, which may be identical or different, represent a hydroxyl or —NH₂radical which may be substituted with a C₁-C₄alkyl radical or with a linker arm Y;

the linker arm Y represents a linear or branched alkylene chain containing from 1 to 14 carbon atoms, which may be interrupted by or terminated with one or more nitrogenous groups and/or one or more hetero atoms such as oxygen, sulphur or nitrogen atoms, and optionally substituted with one or more hydroxyl or C ₁-C₆alkoxy radicals;

R _eand R_frepresent a hydrogen or halogen atom, a C₁-C₄alkyl radical, a C₁-C₄monohydroxyalkyl radical, a C₂-C₄polyhydroxyalkyl radical, a C₁-C₄aminoalkyl radical or a linker arm Y;

R _g, R_h, R_i, R_j, R_kand R_l, which may be identical or different, represent a hydrogen atom, a linker arm Y or a C₁-C₄alkyl radical;

it being understood that the compounds of formula (3) contain only one linker arm Y per molecule.

Among the nitrogenous groups of formula (3) above, mention may be made in particular of amino, mono(C ₁-C₄)alkylamino, di(C₁-C₄)alkylamino, tri(C₁-C₄)-alkylamino, monohydroxy(C₁-C₄) alkylamino, imidazolinium and ammonium radicals.

Among the double bases of formula (3) above, mention may be made more particularly of N,N′-bis(β-hydroxyethyl)-N,N′-bis(4′-aminophenyl)-1,3-diamino-propanol, N,N′-bis(β-hydroxyethyl)-N,N′-bis(4′-amino-phenyl)ethylenediamine, N,N′-bis(4-aminophenyl)-tetramethylenediamine, N,N′-bis(β-hydroxyethyl)-N,N′-bis(4-aminophenyl)tetramethylenediamine, N,N′-bis-(4-methylaminophenyl)tetramethylenediamine, N,N′-bis-(ethyl)-N,N′-bis(4′-amino-3′-methylphenyl)ethylene-diamine and 1,8-bis(2,5-diaminophenoxy)-3,6-dioxa-octane, and the addition salts thereof with an acid. Among these double bases of formula (3), N,N′-bis(β-hydroxyethyl)-N,N′-bis(4′-aminophenyl)-1,3-diamino-propanol and 1,8-bis(2,5-diaminophenoxy)-3,6-dioxa-octane, or one of the addition salts thereof with an acid, are particularly preferred.

(III) the para-aminophenols corresponding to formula (4) below, and the addition salts thereof with an acid:

in which:

R _mrepresents a hydrogen or halogen atom such as fluorine or a C₁-C₄alkyl, C₁-C₄monohydroxyalkyl, (C₁-C₄)alkoxy(C₁-C₄)alkyl, C₁-C₄aminoalkyl or hydroxy (C₁-C₄) alkylamino (C₁-C₄) alkyl radical,

R _nrepresents a hydrogen or halogen atom such as fluorine or a C₁-C₄-alkyl, C₁-C₄monohydroxyalkyl, C₂-C₄polyhydroxyalkyl, C₁-C₄aminoalkyl, C₁-C₄cyanoalkyl or (C₁-C₄) alkoxy (C₁-C₄) alkyl radical.

Among the para-aminophenols of formula (4) above, mention may be made more particularly of para-aminophenol, 4-amino-3-methylphenol, 4-amino-3-fluoro-phenol, 4-amino-3-hydroxymethylphenol, 4-amino-2-methylphenol, 4-amino-2-hydroxymethylphenol, 4-amino-2-methoxymethylphenol, 4-amino-2-aminomethylphenol and 4-amino-2-(β-hydroxyethylaminomethyl)phenol, and the addition salts thereof with an acid.

(IV) the ortho-aminophenols that may be used as oxidation bases in the context of the present invention are chosen especially from 2-aminophenol, 2-amino-1-hydroxy-5-methylbenzene, 2-amino-1-hydroxy-6-methyl-benzene and 5-acetamido-2-aminophenol, and the addition salts thereof with an acid.

(V) among the heterocyclic bases which can be used as oxidation bases in the dye compositions in accordance with the invention, mention may be made more particularly of pyridine derivatives, pyrimidine derivatives and pyrazole derivatives and the addition salts thereof with an acid.

Among the pyridine derivatives, mention may be made more particularly 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-aminopyridine, 2,3-diamino-6-methoxypyridine, 2-(β-methoxyethyl)amino-3-amino-6-methoxypyridine and 3,4-diaminopyridine, and the addition salts thereof with an acid.

Among the pyrimidine derivatives, mention may be made more particularly of the compounds described, for example, in patents DE 2 359 399; JP 88-169 571; JP 91-10659 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 and 2,5,6-tri-aminopyrimidine, and pyrazolopyrimidine derivatives such as those mentioned in patent application FR-A-2 750 048, and among which mention may be made of pyrazolo[1,5-a]pyrimidine-3,7-diamine, 2,5-dimethyl-pyrazolo[1,5-a]pyrimidine-3,7-diamine, pyrazolo[1,5-a]-pyrimidine-3,5-diamine, 2,7-dimethylpyrazolo[1,5-a]-pyrimidine-3,5-diamine, 3-aminopyrazolo[1,5-a]-pyrimidin-7-ol, 3-aminopyrazolo[1,5-a]pyrimidin-5-ol, 2-(3-aminopyrazolo[1,5-a]pyrimidin-7-ylamino)ethanol, 2-(7-aminopyrazolo[1,5-a]pyrimidin-3-ylamino)ethanol, 2-[(3-aminopyrazolo[1,5-a]pyrimidin-7-yl)(2-hydroxy-ethyl)amino]ethanol, 2-[(7-aminopyrazolo[1,5-a]-pyrimidin-3-yl)(2-hydroxyethyl)amino]ethanol, 5,6-di-methylpyrazolo[1,5-a]pyrimidine-3,7-diamine, 2,6-di-methylpyrazolo[1,5-a]pyrimidine-3,7-diamine and 2,5,N7,N7-tetramethylpyrazolo[1,5-a]pyrimidine-3,7-di-amine, the addition salts thereof, and the tautomeric forms thereof, when a tautomeric equilibrium exists, and the addition salts thereof with an acid.

According to the present invention, the additional oxidation bases may preferably represent from 0.0005% to 12% by weight approximately relative to the total weight of the dye composition.

In general, the addition salts with an acid which can be used in the context of the dye compositions of the invention (oxidation bases and couplers) are chosen in particular from the hydro-chlorides, hydrobromides, sulphates, tartrates, lactates and acetates.

The medium that is suitable for the dyeing (or the support) generally consists of water or of a mixture of water and at least one organic solvent in order to dissolve the compounds that would not be sufficiently soluble in water. By way of organic solvent, mention may be made, for example, of C ₁-C₄lower alkanols such as ethanol and isopropanol; glycerol; glycols and glycol ethers such as 2-butoxyethanol, propylene glycol, propylene glycol monomethyl ether, diethylene glycol monoethyl ether and monomethyl ether, and aromatic alcohols such as benzyl alcohol or phenoxyethanol, similar products and mixtures thereof.

The solvents can be present in proportions preferably of between 1 and 40% by weight approximately relative to the total weight of the dye composition, and even more preferably between 5 and 30% by weight approximately.

The pH of the dye composition in accordance with the invention is generally between 3 and 12 approximately and preferably between 5 and 11 approximately. It may be adjusted to the desired value with the aid of acidifying or basifying agents commonly used in the dyeing of keratin fibres.

Among the acidifying agents, mention may be made, by way of example, of inorganic or organic acids such as hydrochloric acid, orthophosphoric acid, carboxylic acids such as tartaric acid, citric acid or lactic acid, and sulphonic acids.

Among the basifying agents that may be mentioned, for example, are aqueous ammonia, alkaline carbonates, alkanolamines such as monoethanolamine, diethanolamine and triethanolamine and derivatives thereof, sodium hydroxide, potassium hydroxide and the compounds of formula (5) below:

in which R is a propylene residue optionally substituted with a hydroxyl group or a C ₁-C₄alkyl radical; R₁₇, R₁₈, R₁₉and R₂₀, which may be identical or different, represent a hydrogen atom or a C₁-C₄alkyl or C₁-C₄hydroxyalkyl radical.

The dye composition in accordance with the invention can also contain various adjuvants used conventionally in compositions for dyeing the hair, such as anionic, cationic, nonionic, amphoteric or zwitterionic surfactants or mixtures thereof, anionic, cationic, nonionic, amphoteric or zwitterionic polymers or mixtures thereof, inorganic or organic thickeners, antioxidants, penetration agents, sequestering agents, fragrances, buffers, dispersing agents, conditioners, such as, for example, volatile or non-volatile silicones, which are modified or unmodified, film-forming agents, ceramides, preserving agents and opacifiers.

Needless to say, a person skilled in the art will take care to select this or these optional complementary compound(s) such that the advantageous properties intrinsically associated with the combination in accordance with the invention is (are) not, or not substantially, adversely affected by the addition or additions envisaged.

The dye composition in accordance with the invention can be in various forms, such as in the form of liquids, creams or gels or in any other form that is suitable for dyeing keratin fibres, and especially human hair.

A subject of the invention is also a process for dyeing keratin fibres, and in particular human keratin fibres such as the hair, using the dye composition as defined above.

According to this process, the dye composition as defined above is applied to the fibres, the colour being developed at acidic, neutral or alkaline pH using an oxidizing agent, this oxidizing agent possibly being added just at the time of use to the dye composition or by means of an oxidizing composition applied simultaneously or sequentially.

According to one particularly preferred embodiment of the dyeing process according to the invention, the dye composition described above is mixed, at the time of use, with an oxidizing composition containing, in a medium which is suitable for dyeing, at least one oxidizing agent present in an amount which is sufficient to develop a coloration. The mixture obtained is then applied to the keratin fibres and is left to stand on them for about 3 to 60 minutes, preferably about 5 to 40 minutes, after which the fibres are rinsed, washed with shampoo, rinsed again and dried.

The oxidizing agent present in the oxidizing composition as defined above may be chosen from the oxidizing agents conventionally used for the oxidation dyeing of keratin fibres, and among which mention may be made of hydrogen peroxide, urea peroxide, alkali metal bromates, persalts such as perborates, percarbonates and persulphates, and peracids. Hydrogen peroxide is particularly preferred.

The pH of the oxidizing composition containing the oxidizing agent as defined above is such that, after mixing it with the dye composition, the pH of the resulting composition applied to the keratin fibres preferably ranges between about 3 and 12 and even more preferably between 5 and 11. It is adjusted to the desired value by means of acidifying or basifying agents usually used for the dyeing of keratin fibres and as defined above.

The oxidizing composition as defined above can also contain various adjuvants conventionally used in compositions for dyeing the hair and as defined above.

The dye composition that is applied to the keratin fibres can be in various forms, such as in the form of liquids, creams or gels or any other form that is suitable for dyeing keratin fibres, and in particular human hair.

According to one variant, a composition containing at least the carbonyl compound is applied to these fibres in a first stage, and a composition containing at least one diaminopyrazole is applied in a second stage, the application of the composition containing the carbonyl compound(s) possibly being followed by a rinsing step, the colour being developed using an oxidizing agent.

Another subject of the invention is a multi-compartment device or dyeing “kit” or any other multi-compartment packaging system, a first compartment of which contains the dye composition as defined above and a second compartment of which contains the oxidizing composition as defined above. These devices may be equipped with a means for applying the desired mixture to the hair, such as the devices described in patent FR-2 586 913 in the name of the Applicant.

According to a different embodiment, the device comprises at least three compartments, a first compartment that contains the carbonyl compound that is useful for the invention, a second compartment that contains a diaminopyrazole, and a third compartment that contains an oxidizing composition.

The examples that follow are intended to 5 illustrate the invention without, however, limiting its scope.

EXAMPLES

Dyeing Examples 1 to 10

The dye compositions below, in accordance with the invention, were prepared (contents in grams): [0221]

AM denotes Active Material



EXAMPLES	1	2	3	4	5	6	7	8	9	10

4,5-Diamino-1-β-	0.645	0.645	0.645	0.645	0.645	0.645	0.645	0.645	0.645	0.645
hydroxyethyl-
pyrazole
dihydrochloride
(oxidation base)
3-Amino-6-methyl-	0.369	0.369	0.369	0.369	0.369	0.369	0.369	0.369	0.369	0.369
phenol (coupler)
Urea (carbonyl	0.1	—	—	—	—	—	—	—	—	—
compound according
to the invention)
p-Dimethylamino-	—	0.05	—	—	—	—	—	—	—	—
benzaldehyde
(carbonyl compound
according to the
invention)
2-Hydroxy-6-	—	—	0.15	—	—	—	—	—	—	—
methylpyrone
(carbonyl compound
according to the
invention)
2-Methylchromone	—	—	—	0.2	—	—	—	—	—	—
(carbonyl compound
according to the
invention)
D-Fructose	—	—	—	—	0.5	—	—	—	—	—
Maleic acid	—	—	—	—	—	0.5	—	—	—	—
(carbonyl compound
according to the
invention)
Maleic anhydride	—	—	—	—	—	—	0.4	—	—	—
(carbonyl compound
according to the
invention)
Kapton H (DuPont)	—	—	—	—	—	—	—	1 AM	—	—
Acetone (carbonyl	—	—	—	—	—	—	—	—	0.1	—
compound according
to the invention)
α,α-Dimethyl-	—	—	—	—	—	—	—	—	—	0.2
acetylacetone
(carbonyl compound
according to the
invention)
Common dye support	(**)	(**)	(**)	(**)	(**)	(**)	(**)	(**)	(**)	(**)
Demineralized	100 g	100 g	100 g	100 g	100 g	100 g	100 g	100 g	100 g	100 g
water qs

Oleyl alcohol polyglycerolated with 2 mol of glycerol 4.0 g [0223]
Oleyl alcohol polyglycerolated with 4 mol of glycerol, containing 78% active material (AM) 5.69 g AM [0224]
Oleic acid 3.0 g [0225]
Oleylamine containing 2 mol of ethylene oxide, sold under the trade name Ethomeen 012 by the company Akzo 7.0 g [0226]
Diethylaminopropyl laurylamino-succinamate, sodium salt, containing 55% AM 3.0 g AM [0227]
Oleyl alcohol 5.0 g [0228]
Oleic acid diethanolamide 12.0 g [0229]
Propylene glycol 3.5 g [0230]
Ethyl alcohol 7.0 g [0231]
Dipropylene glycol 0.5 g [0232]
Propylene glycol monomethyl ether 9.0 g [0233]
Sodium metabisulphite as an aqueous solution containing 35% A M 0.455g A M [0234]
Ammonium acetate 0.8 g [0235]
Antioxidant, sequestering agent qs [0236]
Fragrance, preserving agent qs [0237]
Aqueous ammonia containing 20% NH[0238] ₃10 g
At the time of use, each dye composition above was mixed with an equal amount by weight of an oxidizing composition consisting of a 20-volumes aqueous hydrogen peroxide solution (6% by weight). [0239]
Each resulting composition was applied for 30 minutes to locks of natural grey hair containing 90% white hairs. The locks of hair were then rinsed, washed with a standard shampoo and then dried. [0240]
In all cases, a strong and resistant red shade, with good harmlessness, is obtained. [0241]

Dyeing Examples 11 to 13

The dye compositions below, in accordance with the invention, were prepared (amounts in grams):



EXAMPLE	11	12	13

4,5-Diamino-1-ethyl-3-methyl-	0.639	0.639	—
pyrazole dihydrochloride (oxidation
base)
3,4,5-Triaminopyrazole dihydro-	—	—	0.667
chloride (oxidation base)
3-Amino-6-methylphenol (coupler)	0.369	0.369	0.369
Urea (carbonyl compound according	0.1	—	—
to the invention)
D-Fructose (carbonyl compound	—	0.5	—
according to the invention)
Maleic acid (carbonyl compound	—	—	0.5
according to the invention)
Common dye support	(**)	(**)	(**)
Demineralized water qs	100 g	100 g	100 g

At the time of use, each dye composition above was mixed with an equal amount by weight of an oxidizing composition consisting of a 20-volumes aqueous hydrogen peroxide solution (6% by weight). [0243]
Each resulting composition was applied for 30 minutes to locks of natural grey hair containing 90% white hairs. The locks of hair were then rinsed, washed with a standard shampoo and then dried. [0244]
In the three cases, a strong and resistant shade, with good harmlessness, is obtained. [0245]

Claims

1. Composition for the oxidation dyeing of human keratin fibres, and in particular of human keratin fibres such as the hair, comprising, in a medium that is suitable for dyeing:

in which

R₁, R₁′, R₂and R₂′ denote, independently of each other, a hydrogen atom; a saturated or unsaturated aliphatic hydrocarbon-based chain containing from 1 to 30 carbon atoms, which may be interrupted with one or more hetero atoms or with one or more carbonyl groups, which is unsubstituted or substituted with one or more groups chosen from hydroxyl, C₁-C₄alkoxy, amino, carboxyl, C₁-C₁₀alkoxycarbonyl, halogen, nitro, mono- or di(C₁-C₄)alkylamino, mono- or dihydroxy(C₁-C₄)alkylamino or C₆-C₂₀aryl groups; a C₆-C₂₀aryl group, which is unsubstituted or substituted with one or more groups chosen from hydroxyl, amino, nitro, halogen, carboxyl, (C₁-C₁₀)alkoxycarbonyl, C₁-C₄alkyl, mono- or polyhydroxy(C₁-C₄)alkyl, C₁-C₄alkoxy, mono- or di(C₁-C₄)alkylamino or mono- or dihydroxy(C₁-C₄)alkylamino groups,

x denotes 0 or 1, and, when x is equal to 0, R₁and R₂can form, together with the C═O group, a saturated ring optionally fused to one or more benzene nuclei that may be substituted with one or more C₁-C₁₀alkyl, C₁-C₁₀alkoxy, carboxyl or C₁-C₁₀alkoxycarbonyl radicals,

in which:

B denotes a saturated or unsaturated aliphatic hydrocarbon-based chain containing from 1 to 30 carbon atoms, which may be interrupted with one or more hetero atoms or with one or more carbonyl groups, which is unsubstituted or substituted with one or more groups chosen from hydroxyl, C₁-C₄alkoxy, amino, carboxyl, C₁-C₁₀alkoxycarbonyl, halogen, nitro, mono- or di(C₁-C₄)alkylamino, mono- or dihydroxy(C₁-C₄)alkylamino or C₆-C₂₀aryl groups; a C₆-C₂₀aryl group, which is unsubstituted or substituted with one or more groups chosen from hydroxyl, amino, nitro, halogen, carboxyl, (C₁-C₁₀)alkoxycarbonyl, C₁-C₄alkyl, mono- or polyhydroxy(C₁-C₄)alkyl, C₁-C₄alkoxy, mono- or di(C₁-C₄)alkylamino or mono- or dihydroxy(C₁-C₄)alkylamino groups,

R₃and R₄, which may be identical or different, represent a hydrogen atom, a C₁-C₁₀alkyl, C₁-C₁₀monohydroxyalkyl or C₂-C₁₀polyhydroxyalkyl radical, Na, K or NH₄.

2. Composition according to claim 1, characterized in that the compounds of formula (I) are chosen from urea, aliphatic aldehydes or ketones, aromatic aldehydes or ketones, β-dicarbonyl compounds, γ-pyrones, chromones, aldoses and ketoses.

3. Composition according to claim 1, characterized in that the compound of formula (II) is maleic acid.

4. Composition according to claim 1, characterized in that the compound of formula (III) is maleic anhydride.

5. Composition according to claim 1, characterized in that the polyimide is an aromatic polyimide.

6. Composition according to claim 5, characterized in that the polyimide is obtained from pyromellitic dianhydride or benzophenone dianhydride.

7. Composition according to any one of claims 1 to 6, characterized in that the carbonyl compound(s) preferably represent(s) from 0.00001% to 10% by weight approximately relative to the total weight of the dye composition, even more preferably from 0.001% to 5% and even more preferentially from 0.001% to 3% by weight approximately relative to this weight.

8. Composition according to any one of claims 1 to 7, characterized in that the 4,5- or 3,4-diaminopyrazoles are chosen from the 4,5- or 3,4-diaminopyrazoles of formula (IV) or (V) below, and/or the addition salts thereof with an acid:

in which:

R₅, R₆, R₇, R₈and R₉, which may be identical or different, represent a hydrogen atom; a C₁-C₆alkyl radical which is unsubstituted or substituted with at least one substituent chosen from OR, NHR, NRR′, SR, SOR, SO₂R, COR, COOH, CONH₂, CONHR, CONRR′, PO(OH)₂, SH and SO₃X, a non-cationic heterocycle, Cl, Br or I, X denoting a hydrogen atom, Na, K or NH₄, and R and R′, which may be identical or different, representing a C₁-C₄alkyl or alkenyl; a C₂-C₄hydroxyalkyl radical; a C₂-C₄aminoalkyl radical; a phenyl radical; a phenyl radical substituted with a halogen atom or a C₁-C₄alkyl, C₁-C₄alkoxy, nitro, trifluoromethyl, amino or C₁-C₄alkylamino radical; a benzyl radical; a benzyl radical substituted with a halogen atom or with a C₁-C₄alkyl, C₁-C₄alkoxy, methylenedioxy or amino radical; a radical

in which m and n are integers, which may be identical or different, between 0 and 3 inclusive, X represents an oxygen atom or an NH group, Y represents a hydrogen atom or a C₁-C₄alkyl radical, and Z represents a methyl radical when n is equal to 0, or Z represents a C₁-C₄alkyl radical, a group OR or NR″R′″ when n is greater than or equal to 1, R″ and R′″, which may be identical or different, denoting a hydrogen atom or a C₁-C₄alkyl radical; or R₉forms with the nitrogen atom of the group NR₇R₈in position 5 an at least 4-membered heterocycle,

R₁₀represents a C₁-C₆alkyl radical; a C₁-C₄hydroxy-alkyl radical; a C₁-C₄aminoalkyl radical; a (C₁-C₄)-alkylamino(C₁-C₄)alkyl radical; a di(C₁-C₄)alkylamino-(C₁-C₄)alkyl radical; a hydroxy(C₁-C₄)alkylamino(C₁-C₄)-alkyl radical; a (C₁-C₄)alkoxymethyl radical; a phenyl radical; a phenyl radical substituted with a halogen atom or with a C₁-C₄alkyl, C₁-C₄alkoxy, nitro, trifluoromethyl, amino or C₁-C₄alkylamino radical; a benzyl radical; a benzyl radical substituted with a halogen atom or with a C₁-C₄alkyl, C₁-C₄alkoxy, nitro, trifluoromethyl, amino or C₁-C₄alkylamino radical; a heterocycle chosen from thiophene, furan and pyridine, or a radical —(CH₂)_p—O—(CH₂)_q—OR″, in which p and q are integers, which may be identical or different, between 1 and 3 inclusive and R″ is as defined above, it being understood that:

at least one of the radicals R₅, R₆, R₇and R₈represents a hydrogen atom.

9. Composition according to any one of claims 1 to 7, characterized in that the triaminopyrazoles are chosen from the compounds of formula (VI) below, and the addition salts thereof with an acid:

in which:

R₁₁and R₁₂, which may be identical or different, represent a hydrogen atom or a C₁-C₄alkyl or C₂-C₄hydroxyalkyl radical.

10. Composition according to claim 8, characterized in that the 4,5- or 3,4-diaminopyrazoles of formula (IV) are chosen from 4,5-diamino-1-(4′-methoxybenzyl)pyrazole, 4,5-diamino-1-(4′-methyl-benzyl)pyrazole, 4,5-diamino-1-(4′-chlorobenzyl)-pyrazole, 4,5-diamino-1-(3′-methoxybenzyl)pyrazole, 4-amino-1-(4′-methoxybenzyl)-5-methylaminopyrazole, 4-amino-5-(β-hydroxyethyl)amino-1-(4′-methoxybenzyl)-pyrazole, 4-amino-5-(β-hydroxyethyl)amino-1-methyl-pyrazole, 4-amino-(3)-5-methylaminopyrazole, 3-(5),4-diaminopyrazole, 4,5-diamino-1-methylpyrazole, 4,5-diamino-1-ethylpyrazole, 4,5-diamino-1-isopropyl-pyrazole, 4,5-diamino-1-hydroxyethylpyrazole, 4,5-diamino-1-benzylpyrazole, 4-diamino-5-hydroxyethyl-amino-1-hydroxyethylpyrazole, 4-diamino-5-methylamino-1-hydroxyethylpyrazole, 3-amino-4,5,7,8-tetrahydro-pyrazolo[1,5-a]pyrimidine, 7-amino-2,3-dihydro-1H-imidazole[1,2-b]pyrazole, 3-amino-8-methyl-4,5,7,8-tetrahydropyrazolo[1,5-a]pyrimidine, 2-(4,5-diamino-1-pyrazolyl)-1-ethanesulphonic acid, 2-(4,5-diamino-1-pyrazolyl)acetamide, 2-(4,5-diamino-1-pyrazolyl)acetic acid, 2-(2-dimethylaminoethyl)-2H-pyrazole-3,4-diamine and 2-(2-methoxyethyl)-2H-pyrazole-3,4-diamine, and the addition salts thereof with an acid.

11. Composition according to claim 10, characterized in that the 4,5- or 3,4-diaminopyrazoles of formula (IV) are chosen from:

4,5-diamino-1-benzylpyrazole,

4,5-diamino-1-(4′-chlorobenzyl)pyrazole,

4,5-diamino-1-methylpyrazole,

4,5-diamino-1-hydroxyethylpyrazole,

2-(2-methoxyethyl)-2H-pyrazole-3,4-diamine, and the addition salts thereof with an acid.

12. Composition according to claim 8, characterized in that the 4,5-diaminopyrazoles of formula (V) are chosen from:

1-benzyl-4,5-diamino-3-methylpyrazole,

4,5-diamino-1-(β-hydroxyethyl)-3-(4′-methoxyphenyl)-pyrazole,

4,5-diamino-1-(β-hydroxyethyl)-3-(4′-methylphenyl)-pyrazole,

4,5-diamino-1-(β-hydroxyethyl)-3-(3′-methylphenyl)-pyrazole,

4,5-diamino-3-methyl-1-isopropylpyrazole,

4,5-diamino-3-(4′-methoxyphenyl)-1-isopropylpyrazole,

4,5-diamino-1-ethyl-3-methylpyrazole,

4,5-diamino-1-ethyl-3-(4′-methoxyphenyl)pyrazole,

4,5-diamino-3-hydroxymethyl-1-methylpyrazole,

4,5-diamino-1-ethyl-3-hydroxymethylpyrazole,

4,5-diamino-3-hydroxymethyl-1-isopropylpyrazole,

4,5-diamino-3-hydroxymethyl-1-tert-butylpyrazole,

4,5-diamino-3-hydroxymethyl-1-phenylpyrazole,

4,5-diamino-3-hydroxymethyl-1-(2′-methoxyphenyl)-pyrazole,

4,5-diamino-3-hydroxymethyl-1-(3′-methoxyphenyl)-pyrazole,

4,5-diamino-3-hydroxymethyl-1-(4′-methoxyphenyl)-pyrazole,

1-benzyl-4,5-diamino-3-hydroxymethylpyrazole,

4,5-diamino-3-methyl-1-(2′-methoxyphenyl)pyrazole,

4,5-diamino-3-methyl-1-(3′-methoxyphenyl)pyrazole,

4,5-diamino-3-methyl-1-(4′-methoxyphenyl)pyrazole,

3-aminomethyl-4,5-diamino-1-methylpyrazole,

3-aminomethyl-4,5-diamino-1-ethylpyrazole,

3-aminomethyl-4,5-diamino-1-isopropylpyrazole,

3-aminomethyl-4,5-diamino-1-tert-butylpyrazole,

4,5-diamino-3-dimethylaminomethyl-1-methylpyrazole,

4,5-diamino-3-dimethylaminomethyl-1-ethylpyrazole,

4,5-diamino-3-dimethylaminomethyl-1-isopropyl-pyrazole,

4,5-diamino-3-dimethylaminomethyl-1-tert-butyl-pyrazole,

4,5-diamino-3-ethylaminomethyl-1-methylpyrazole,

4,5-diamino-3-ethylaminomethyl-1-ethylpyrazole,

4,5-diamino-3-ethylaminomethyl-1-isopropylpyrazole,

4,5-diamino-3-ethylaminomethyl-1-tert-butylpyrazole,

4,5-diamino-3-methylaminomethyl-1-methylpyrazole,

4,5-diamino-3-methylaminomethyl-1-isopropylpyrazole,

4,5-diamino-1-ethyl-3-methylaminomethylpyrazole,

1-tert-butyl-4,5-diamino-3-methylaminomethylpyrazole,

4,5-diamino-3-[(β-hydroxyethyl)aminomethyl]-1-methyl-pyrazole,

4,5-diamino-3-[(β-hydroxyethyl)aminomethyl]-1-iso-propylpyrazole,

4,5-diamino-1-ethyl-3-[(β-hydroxyethyl)aminomethyl]-pyrazole,

1-tert-butyl-4,5-diamino-3-[(β-hydroxyethyl)amino-methyl]pyrazole,

4-amino-5-(β-hydroxyethyl)amino-1,3-dimethylpyrazole,

4-amino-5-(β-hydroxyethyl)amino-1-isopropyl-3-methyl-pyrazole,

4-amino-5-(β-hydroxyethyl)amino-1-ethyl-3-methyl-pyrazole,

4-amino-5-(β-hydroxyethyl)amino-1-tert-butyl-3-methylpyrazole,

4-amino-5-(β-hydroxyethyl)amino-1-phenyl-3-methyl-pyrazole,

4-amino-5-(β-hydroxyethyl)amino-1-(2-methoxyphenyl)-3-methylpyrazole,

4-amino-5-(β-hydroxyethyl)amino-1-(3-methoxyphenyl)-3-methylpyrazole,

4-amino-5-(β-hydroxyethyl)amino-1-(4-methoxyphenyl)-3-methylpyrazole,

4-amino-5-(β-hydroxyethyl)amino-1-benzyl-3-methyl-pyrazole,

4-amino-1-ethyl-3-methyl-5-methylaminopyrazole,

4-amino-1-tert-butyl-3-methyl-5-methylaminopyrazole,

4,5-diamino-1,3-dimethylpyrazole,

4,5-diamino-3-tert-butyl-1-methylpyrazole,

4,5-diamino-1-tert-butyl-3-methylpyrazole,

4,5-diamino-1-methyl-3-phenylpyrazole,

4,5-diamino-1-(β-hydroxyethyl)-3-methylpyrazole,

4,5-diamino-1-(β-hydroxyethyl)-3-phenylpyrazole,

4,5-diamino-1-methyl-3-(2′-chlorophenyl)pyrazole,

4,5-diamino-1-methyl-3-(4′-chlorophenyl)pyrazole,

4,5-diamino-1-methyl-3-(3′-trifluoromethylphenyl)-pyrazole,

4,5-diamino-1,3-diphenylpyrazole,

4,5-diamino-3-methyl-1-phenylpyrazole,

4-amino-1,3-dimethyl-5-phenylaminopyrazole,

4-amino-1-ethyl-3-methyl-5-phenylaminopyrazole,

4-amino-1,3-dimethyl-5-methylaminopyrazole,

4-amino-3-methyl-1-isopropyl-5-methylaminopyrazole,

4-amino-3-isobutoxymethyl-1-methyl-5-methylamino-pyrazole,

4-amino-3-methoxyethoxymethyl-1-methyl-5-methylamino-pyrazole,

4-amino-3-hydroxymethyl-1-methyl-5-methylamino-pyrazole,

4-amino-1,3-diphenyl-5-phenylaminopyrazole,

4-amino-3-methyl-5-methylamino-1-phenylpyrazole,

4-amino-1,3-dimethyl-5-hydrazinopyrazole,

5-amino-3-methyl-4-methylamino-1-phenylpyrazole,

5-amino-1-methyl-4-(N,N-methylphenyl)amino-3-(4′-chlorophenyl)pyrazole,

5-amino-3-ethyl-1-methyl-4-(N,N-methylphenyl)amino-pyrazole,

5-amino-1-methyl-4-(N,N-methylphenyl)amino-3-phenyl-pyrazole,

5-amino-3-ethyl-4-(N,N-methylphenyl)aminopyrazole,

5-amino-4-(N,N-methylphenyl)amino-3-phenylpyrazole,

5-amino-4-(N,N-methylphenyl)amino-3-(4′-methylphenyl)-pyrazole,

5-amino-3-(4′-chlorophenyl)-4-(N,N-methylphenyl)-aminopyrazole,

5-amino-3-(4′-methoxyphenyl)-4-(N,N-methylphenyl)-aminopyrazole,

4-amino-5-methylamino-3-phenylpyrazole,

4-amino-5-ethylamino-3-phenylpyrazole,

4-amino-5-ethylamino-3-(4′-methylphenyl)pyrazole,

4-amino-3-phenyl-5-propylaminopyrazole,

4-amino-5-butylamino-3-phenylpyrazole,

4-amino-3-phenyl-5-phenylaminopyrazole,

4-amino-5-benzylamino-3-phenylpyrazole,

4-amino-5-(4′-chlorophenyl)amino-3-phenylpyrazole,

4-amino-3-(4′-chlorophenyl)-5-phenylaminopyrazole,

4-amino-3-(4′-methoxyphenyl)-5-phenylaminopyrazole,

1-(4′-chlorobenzyl)-4,5-diamino-3-methylpyrazole,

4,5-diamino-3-hydroxymethyl-1-isopropylpyrazole,

4-amino-1-ethyl-3-methyl-5-methylaminopyrazole,

13. Composition according to claim 12, characterized in that the 4,5-diaminopyrazoles of formula (V) are chosen from:

4,5-diamino-1,3-dimethylpyrazole,

4,5-diamino-3-methyl-1-phenylpyrazole,

4,5-diamino-1-methyl-3-phenylpyrazole,

4-amino-1,3-dimethyl-5-hydrazinopyrazole,

1-benzyl-4,5-diamino-3-methylpyrazole,

4,5-diamino-3-tert-butyl-1-methylpyrazole,

4,5-diamino-1-tert-butyl-3-methylpyrazole,

4,5-diamino-1-(β-hydroxyethyl)-3-methylpyrazole,

4,5-diamino-1-ethyl-3-methylpyrazole,

4,5-diamino-1-ethyl-3-(4′-methoxyphenyl)pyrazole,

4,5-diamino-1-ethyl-3-hydroxymethylpyrazole,

4,5-diamino-3-hydroxymethyl-1-methylpyrazole,

4,5-diamino-3-hydroxymethyl-1-isopropylpyrazole,

4,5-diamino-3-methyl-1-isopropylpyrazole,

14. Composition according to claim 9, characterized in that the triaminopyrazoles of formula (VI) are chosen from 3,4,5-triaminopyrazole, 1-methyl-3,4,5-triaminopyrazole, 3,5-diamino-1-methyl-4-methyl-aminopyrazole and 3,5-diamino-4-(β-hydroxyethyl)amino-1-methylpyrazole, and the addition salts thereof with an acid.

15. Composition according to any one of the preceding claims 1 to 14, characterized in that the 4,5- or 3,4-diaminopyrazole(s) and/or the triaminopyrazole(s) and/or the corresponding addition salt(s) with an acid represent from 0.0005% to 12% by weight relative to the total weight of the dye composition.

16. Composition according to claim 15, characterized in that the 4,5- or 3,4-diamino-pyrazole(s) and/or the triaminopyrazole(s) and/or the corresponding addition salt(s) with an acid represent from 0.005% to 6% by weight relative to the total weight of the dye composition.

17. Composition according to any one of the preceding claims 1 to 16, characterized in that the weight ratio of the carbonyl compound(s) to the 4,5- or 3,4-diaminopyrazole(s) and/or the triaminopyrazole(s) and/or the addition salt(s) with an acid is between 0.001 and 100 and preferably between 0.01 and 10.

18. Composition according to any one of the preceding claims 1 to 17, characterized in that the addition salts with an acid are chosen from the hydrochlorides, hydrobromides, sulphates, tartrates, lactates and acetates.

19. Composition according to any one of the preceding claims 1 to 18, characterized in that it contains at least one coupler.

20. Composition according to claim 19, characterized in that the coupler(s) represent(s) from 0.0001% to 10% by weight approximately relative to the total weight of the dye composition, and even more preferably from 0.005% to 5% by weight approximately relative to this weight.

21. Composition according to any one of the preceding claims 1 to 20, characterized in that it contains at least one additional oxidation base other than the pyrazoles defined in claims 1 to 14.

22. Composition according to claim 21, characterized in that the additional oxidation base(s) represent(s) from 0.0005% to 12% by weight approximately relative to the total weight of the dye composition.

23. Composition according to any one of the preceding claims 1 to 22, characterized in that it has a pH of between 3 and 12.

24. Composition according to any one of the preceding claims 1 to 23, characterized in that it is in the form of liquids, creams or gels or in any other form that is suitable for dyeing keratin fibres, and especially human hair.

25. Process for dyeing keratin fibres, and in particular human keratin fibres such as the hair, characterized in that at least one dye composition as defined in any one of claims 1 to 24 is applied to these fibres, and the colour is revealed at acidic, neutral or alkaline pH using an oxidizing agent.

26. Process according to claim 25, characterized in that the oxidizing agent present in the oxidizing composition is chosen from hydrogen peroxide, urea peroxide, alkali metal bromates, persalts such as perborates, percarbonates and persulphates, and peracids.

27. Process for dyeing keratin fibres, and in particular human keratin fibres such as the hair, characterized in that a composition containing at least one carbonyl compound as defined in any one of claims 1 to 24 is applied to these fibres in a first stage, a composition containing at least one diaminopyrazole as defined in any one of claims 1 to 24 is applied in a second stage, the application of the composition containing the carbonyl compound(s) possibly being followed by a rinsing step, the colour being developed using an oxidizing agent.

28. Multi-compartment device comprising a first compartment containing a dye composition as defined in any one of claims 1 to 24 and a second compartment containing an oxidizing composition.

29. Multi-compartment device comprising a first compartment containing a carbonyl compound as defined in any one of claims 1 to 24, a second compartment containing a diaminopyrazole as defined in any one of claims 1 to 24, and a third compartment containing an oxidizing composition.