FR2931668A1 - Composition, useful for coloring human keratin fibers, preferably hair, comprises one or more acid direct dyes and at least alkylene sulfite compound, in a medium - Google Patents

Abstract

Coloring composition comprises one or more acid direct dyes and at least 10 wt.% of alkylene sulfite compound (I), in a medium. Coloring composition comprises one or more acid direct dyes and at least 10 wt.% of alkylene sulfite compound of formula (I), in a medium. R 1-R 3H, 1-4C alkyl or phenyl; and n : 0 or 1. An independent claim is included for a device with several compartments, comprising a first composition comprising acid direct dyes in a first compartment, a second composition comprising (I) in a second compartment, where the mixture of compositions in the two compartments contains 10 wt.% of (I). [Image].

Description

COMPOSITION COMPRISING AN ACIDIC COLOR AND ALKYLENE SULFITE COMPOUND, KERATIN FIBER COLORING METHOD, AND DEVICE

The present invention relates to compositions useful for staining human keratinous fibers, comprising in a cosmetically acceptable medium, one or more acidic direct dyes and one or more alkylene sulfite compounds. It also relates to a coloring process implementing it and a suitable 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, called direct or semi-permanent staining, comprises the application of direct dyes which are colored and coloring molecules, having an 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 are nonionic, cationic (basic direct dyes) and to a lesser extent anionic (acid direct dyes). The use of nonionic or cationic direct dyes has been the subject of many developments and there are now many coloring media adapted to receive them. In the case of acid dyes, the situation is less favorable than for the previous ones. Indeed, to effectively color the keratin fibers with such compounds, it is often necessary to formulate them in the presence of organic solvents. Most often these solvents are chosen from aromatic alcohols, such as in particular benzyl alcohol and benzyloxyethanol. The problems encountered with such formulations result in particular from the presence of aromatic solvents. To be effective these solvents are usually present in a relatively large amount. However, these aromatic solvents are very sparingly soluble in aqueous medium, and thus require the use of large amounts of co-solvents (usually ethanol) to make them compatible with conventional dyeing formulations. Other solvents have been proposed for using the anionic dyes. In US Pat. No. 3,464,778, various classes of organic solvents are thus proposed. Among these are sulfur esters of alkylene glycols having 2 to 4 carbon atoms. However, the results obtained under the conditions described in this patent are still insufficient, particularly in terms of dye, especially as regards the chromaticity or the rise of the dye. One of the objectives of the present invention is therefore to provide dye compositions comprising one or more acidic direct dyes and which have satisfactory dyeing properties, in particular in that they make it possible to obtain homogeneous, powerful dyes between the tip and the root of the same fiber and fiber to another, and particularly chromatic. These and other objects are achieved by the present invention which relates to dye compositions comprising in a cosmetically acceptable medium, (i) one or more acid direct dyes and (ii) at least 10% by weight relative to the total weight of the composition, one or more compounds of formula (I) below: ## STR2 ## in which R 1, R 2, R 3, which may be identical or different, represent an atom of hydrogen, a C1-C4 alkyl radical, a phenyl radical; n denotes 0 or 1. It also relates to a process for dyeing human keratinous fibers, and in particular the hair, comprising applying to said fibers the composition according to the invention. Another object of the invention consists of a multi-compartment device comprising in one of them one or more acid direct dyes; in another compartment one or more compounds of formula (I) detailed above; such that the mixture of the compartments results in a composition according to the invention.

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. Note that the direct dyes used in the invention are molecules absorbing light radiation in the visible range (400-750 nm).

As indicated above, the dyeing composition according to the invention comprises one or more acid direct dyes. These acid direct dyes can be chosen from all the acid direct dyes known per se. These dyes preferably comprise one or more sulphonic functional groups (-SO 3 H) or sulphonates (-SO 3 -X +; the counter-ion X + may be a cation derived from an alkaline or alkaline-earth metal or an amine or a cation present in the molecule itself of the direct dye) and / or carboxylic (-COOH) or carboxylate (-COO-X +, the counterion being defined as above). More particularly, the dye comprises from one to three sulfonic, sulfonate, carboxylic and / or carboxylate groups, preferably one or two. It should be noted that the dyes of this type may comprise in their structure one or more quaternized amino groups, as long as the number of sulfonic / sulphonate / carboxylic / carboxylate group (s) is greater than that of the quaternized amino groups present. in the molecule. The acidic direct dyes may be chosen from azo dyes; methinic; azomethines; carbonyls including quinone; heteroanthracenics, including xanthenics, acridines, azines, oxazinics and thiazines; nitrated (hetero) aryl; tri (hetero) aryl methanes; porphyrins; phthalocyanines and natural direct dyes, alone or in mixtures. These acid direct dyes are preferably chosen from azo direct dyes; anthraquinone; heteroanthracenic and in particular xanthenic; triarylmethane.

Even more preferentially, the acidic direct dyes are chosen from the direct anthraquinone dyes, triarylmethanes.

It is recalled that an azo direct dye comprises at least one -N = N- function not included in a ring, in particular one or two azo bonds, and preferably an azo bond.

In addition, these compounds comprise, connected to each azo functional group, two groups chosen from benzene, naphthalenic or unsaturated aromatic or non-aromatic 5-membered cyclic cyclic groups comprising one or two nitrogen atoms, in particular two nitrogen atoms; said cyclic groups being optionally substituted, apart from the carboxylic and / or sulphonic substituent (s), by one or two (C 1 -C 6) alkyl groups; hydroxyl; C1-C6 hydroxyalkyl; C1-C6 alkoxy; nitro (-NO2); amino substituted or unsubstituted with one or two C 1 -C 4 alkyl groups, phenyl, acetamido; halogen such as chlorine, bromine; phenyl optionally substituted by one or two C 1 -C 6 alkyl groups, halogen, such as chlorine. As examples of acidic azo dyes according to the invention, mention may be made of Acid Yellow 9, Acid Black 1, Acid Yellow 36, Acid Orange 7, Acid Red 33, Acid Red 35, Acid Yellow 23, Acid Orange 24, Acid Red 14, Acid Red 18, Acid Red 27, Acid Red 184, Acid Red 73, Acid Red 195 Acid Yellow 17, Acid Yellow 121, Acid Orange 6, Acid Orange 10, Acid Orange 20, Acid Black 52 and 4-hydroxy-3- (2-methoxyphenylazo) -1-naphthalene sulfonic acid.

As regards the direct anthraquinone dyes used in the context of the invention, the latter preferably comprise, in their structure, at least one unit (b) below: (so3x) z (COOY) z 'this unit being optionally substituted with 1 to 8, preferably 1 to 4, even more advantageously 1 or 2, identical or different radicals, such as in particular hydroxyl groups, C 1 -C 6 alkoxy, amino substituted or unsubstituted by one or two radicals, identical to one another; or not, selected from C1-C4 alkyl, cyclohexyl, phenyl substituted or not by one to three groups, identical or different, selected from C1-C4 alkyl. Both X and Y designate, independently of one another, a cation derived from an alkali or alkaline earth metal or an amine or a cation present in the molecule itself of the direct dye as defined above.

In addition, z and z ', which may be identical or different, denote an integer ranging from 0 to 3 with z + z'? 1. Among the anthraquinone acid direct dyes that may be used in the context of the invention, mention may be made of the dyes Acid Violet 43, Acid Blue 62, Acid Blue 80 and Acid Green 25.

For the purposes of the invention, the term "heteroanthracenic dye" means a dye comprising an anthracene group in which at least one of the two carbon atoms of the central CH groups is replaced by a heteroatom.

The heteroanthracenic direct dyes used in the composition according to the invention preferably comprise, in their structure, at least one following unit (c), or its tautomeric forms: in which formula: L represents a heteroatom preferably chosen from oxygen, sulfur; an NH or NR group; M represents a heteroatom more particularly selected from oxygen, sulfur, nitrogen, and preferably from oxygen or nitrogen; an NR group; a CH group; a CR group; K and Q represent, independently of one another, a hydrogen atom, an oxygen atom, a group -NHR 'or -N (R') 2; a hydroxyl; C1-C6 alkoxy; a group ùOA with A representing a cation derived from an alkali metal such as sodium, potassium; an amino radical optionally substituted with one or two groups, which may be identical or different, chosen from C1-C6 alkyl radicals optionally bearing a hydroxyl group, phenyl; an ammonium group of the type -N + (R ') 3; R, R ', independently of each other, represent a C 1 -C 6 alkyl, phenyl radical. In addition, unit (c) may carry from one to six substituents selected from C1-C6 alkyl radicals; a halogen atom, in particular bromine or iodine; two substituents carried by two adjacent carbon atoms of the same benzene ring, which may optionally form with said ring, a fused benzene ring. Both X and Y designate, independently of each other, a cation derived from an alkali or alkaline earth metal or an amine or a cation present in the molecule itself of the direct dye, as previously defined. Moreover, z and z ', which are identical or different, designate an integer ranging from 0 to 3 with z + z'? 1. Among the heteroanthracenic acid direct dyes that may be used in the invention, mention may be made of the following compounds: Acid Red 51, Acid Red 52, Acid Red 87, Acid Red 95, Acid Violet 50, Acid Orange 11. Preferably, the direct acid dye heteroanthracenic is a xanthene acid dyes.

With regard to the dyes of the triarylmethane type, the latter preferably correspond to the following formulas (d), (e) and (f), and their tautomeric forms: ## STR2 ## (SO3Y) z (COOY ') z' (SO3Y) z (COOY ') z' (d) (e) (f) wherein: - Ar, which may be identical or different, represent a phenyl or naphthyl; - A represents O, NR ", N + (R") 2 in which R ", which may be identical or different, represent a C1-C6 alkyl or benzyl (C6H5-CH2-) radical Ar and / or phenyl or naphthyl rings units of formulas (d), (e) and (f), optionally carrying 1 to 4 groups, preferably 1 or 2, chosen from the following groups: halogen atom, preferably chlorine, hydroxyl, alkyl; C1-C6, amino substituted or not by one or two identical or different groups chosen from C1-C6 alkyl radicals.X as well as Y denote, independently of one another, a cation derived from an alkaline metal. or alkaline earth or an amine or a cation present in the molecule itself of the direct dye, as defined before.

In addition, z and z ', which may be identical or different, denote an integer ranging from 0 to 3 with z + z' 1. Among the triarylmethane acid direct dyes that can be used according to the invention, mention may be made of Acid Blue 9, Acid Violet 49 or Acid Blue 7, Acid Blue 1, Acid Blue 3, Acid Blue 104, Acid Green 50, Acid Green 3, Acid Green 5, Acid Blue Green 9, Acid Green 22. Preferably, the content of direct dye (s) acid (s) varies from 0.001 to 10% by weight relative to the weight of the composition, preferably from 0.01 to 5% by weight relative to the weight of the composition. As indicated above, the dyeing composition according to the invention comprises

also one or more compounds of formula (I) (CHZ) n R ~~ \ R2 O ~ O R3

Wherein R 1, R 2, R 3, which may be identical or different, represent a hydrogen atom, a C 1 -C 4 alkyl radical or a phenyl radical; n is 0 or 1.

Preferably n denotes 0. The compounds of formula (I) are frequently referred to as alkylenesulphites. Examples of compounds of formula (I) that may be mentioned in particular are ethylene sulphite (or glycol sulphite or 1,3,2-dioxathiolane 2-oxide, 1,1-diphenyl-1,2-propanediol sulfite, 1,2-propylene glycol sulfite, 1,3-butylene glycol sulfite, preferably the compound of formula (I) is 1,3,2-dioxathiolane 2- As previously indicated, the compound (s) of formula (I) are present at a content greater than or equal to 10% by weight, relative to the weight of the composition, According to an advantageous embodiment of the invention, the The content of the compound (s) of formula (I) is 10 to 50% by weight, based on the weight of the composition, the 10% limit being preferably excluded. the content of compound (s) of formula (I) is between 10 and 20% by weight, relative to the weight of the composition, the 10% limit being preferably excluded. Moreover, the weight ratio of compound (s) of formula (I) / direct dye (s) acid (s) is preferably greater than or equal to 10. Even more preferentially, this ratio varies from 10 to 1000, and according to an even more advantageous embodiment, varies from 15 to 100.

The composition according to the invention may also comprise one or more additional dyes. In particular, this or these additional dyes may be chosen from natural dyes, direct dyes different from the above acid dyes, or combinations thereof. 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 dyes suitable in particular for the implementation of the invention are chosen from lawsone, juglone, alizarin, purpurin, carminic acid, kermesic acid, purpurogalline, protocatechaldehyde, indigo, isatin, curcumin, spinusoline, chlorophylls, chloropyllines, orceins, haematein, hematoxylin, brazilin, braziline, safflower dyes (such as, for example, carthamine), flavonoids (with for example morine, apigenidine, sandalwood), anthocyanins (of the apigeninidine type), carotenoids, tannins, sorghum and carmine cochineal. It is also possible to use the extracts or decoctions containing these natural dyes and in particular the henna extracts. Preferably, the natural dye is chosen from lawsone, juglone, alizarin, purpurin, carminic acid, kermesic acid, purpurogalline, protocatechaldehyde, indigo, isatin, curcumin, spinulosin, apigenidine, chlorophyllin, sorghum, orceins and carmine cochineal. The natural dyes, when present, represent from 0.01 to 10% by weight relative to the weight, preferably from 0.1 to 5% by weight relative to the weight of the composition.

The composition may also comprise one or more additional direct dyes different from the acid dyes described above, and chosen from cationic and nonionic species.

As examples of suitable additional direct dyes, mention may be made of azo direct dyes; methinic; carbonyls; heteroanthracenic; nitro (hetero) aryl; tri- (hetero) aryl methanes; porphyrins and phthalocyanines, alone or in mixtures. Here again, the azo dyes comprise a function -N = N-, the two nitrogen atoms of which 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 methine, azomethine, mono- and di-arylmethane compounds, indoamines (or diphenylamines), indophenols, indoanilines, carbocyanines, azacabocyanines and their isomers, diazacarbocyanines and their isomers, tetraazacarbocyanines, hemicyanines. As regards the dyes of the carbonyl family, mention may be made, for example, of the dyes chosen from acridones, benzoquinones, anthraquinones, naphthoquinones, benzanthrones, anthranthrones, pyranthrones, pyrazolanthrones, pyrimidinoanthrones, flavanthrones, idanthrones, flavones, (iso) violanthrones, isoindolinones, benzimidazolones, isoquinolinones, anthrapyridones, pyrazoloquinazolones, perinones, quinacridones, quinophthalones, indigoids, thioindigos, naphthalimides, anthrapyrimidines, diketopyrrolopyrroles, coumarins. As regards the dyes of the family of heteroanthracenics, mention may be made in particular of xanthenics, acridine, azine, oxazine and thiazine. 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; azomethines; methine; azacarbocyanines such as 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. Even more preferably, these additional direct dyes are chosen from nitro dyes of the benzene series; azo direct dyes; azomethines; methines and 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 azo and / or azomethine (hydrazonic) di- or trichromophoric dyes, symmetrical or not, comprising on the one hand at least one aromatic heterocycle comprising 5 or 6 ring members, optionally fused, 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 ') 2 group 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, preferably nitrogen. 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 C2-C4 hydroxyalkoxy radical; 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 C2-C4 hydroxyalkoxy radical; 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, methine or tetraazapentamethine monochromophoric direct dyes that can 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: ## STR3 ## in which: D represents a nitrogen atom or the group -CH, R, 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: R4 R4 (R) 1 R4 .R4 RNI / In which R4 represents a C1-C4 alkyl radical which may be substituted by a hydroxyl radical; Wherein R 5 represents a hydrogen atom, a C 1 -C 4 alkoxy radical, a halogen atom such as bromine, chlorine, iodine or fluorine, R 6 represents a hydrogen atom, a C1-C4 alkyl radical or forms, with a carbon atom of the benzene ring, an optionally oxygenated heterocycle and / or substituted with one or more C1-C4 alkyl groups, R7 represents a hydrogen atom or halogen, such as bromine, chlorine, iodine or fluorine, D and D2, which may be identical or different, represent a nitrogen atom or the group -CH, m = 0 or 1, X represents an anion cosmetically acceptable and preferably selected from chloride, methyl sulfate and acetate, E represents a group chosen by the following structures: R '-N + N ~ N + \ u \ R' R 'in which R' represents an alkyl radical C1-C4; when m = 0 and D, represents a nitrogen atom, then E may also denote a group of following structure: R 'R' wherein 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-CH 3 X -N = N N X -N + H N + CH 3

\ \

CH3 CH3 CH3 / CH3

N + / Il ~> N = NN CH3 // \ H3C-N + C = NCH3 ~ NNI ~ N \ \ + '~ N, NNNNXINYN, NXI OMe OMe OMe OMe NN ~ NAN \ NN I N + ~ N NN X- 1 XIX N + NENNN ~ N, X OH OH X NN ~ NN \ NN X NN / ~ NN \ NN X N + ~ N ~ N ,. Embedded image Among the tetraazapentamethine type dyes that can be used according to the invention, mention may be made of the tetraazapentamethine type dyes that can be used according to the invention, and these are the following: ## STR1 ## following compounds in the table below, wherein An is defined as above X represents an anion preferably selected from chloride, iodide, methyl sulfate, ethyl sulfate, acetate. When present, the additional direct dye or dyes 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 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 (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), the crosslinked homopolymers of acrylic acid or acrylamidopropanesulfonic acid, and preferably from cellulose thickeners with in particular hydroxyethylcellulose.

As regards the associative thickeners, it is possible to use polymers of nonionic, anionic, cationic or amphoteric nature. 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, 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 consists of an ethylenic unsaturated anionic monomer, advantageously a vinyl carboxylic acid and any particularly with an acrylic acid or a methacrylic acid or mixtures thereof, and whose fatty-chain allyl ether unit corresponds to the following monomer of formula (A): CH 2 = CR 'CH 2 O Bn R (A) 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, and more particularly alkyl radicals. or cycloalkyl, comprising from 8 to 30 carbon atoms, preferably 10 to 24, and even more preferably from 12 to 18 carbon atoms. A more particularly preferred unit of formula (A) is a unit in which R 'denotes H, n is equal to 10, and R denotes a stearyl (C13) 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 whose hydrophilic unit of olefinic unsaturated carboxylic acid type corresponds to the 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 OR3 1 II R2 O (C)

in which, R2 denotes H or CH3 or C2H5 (that is to say acrylate, methacrylate or ethacrylate units) and preferably H (acrylate units) or CH3 (methacrylate units), R3 denotes a C10-C30 alkyl radical; and preferably C12-C22.

The (C 10 -C 30) alkyl esters of unsaturated carboxylic acids are, for example, lauryl acrylate, stearyl acrylate, decyl acrylate, isodecyl acrylate and dodecyl acrylate. and corresponding methacrylates, lauryl methacrylate, stearyl methacrylate, decyl methacrylate, isodecyl methacrylate, and dodecyl methacrylate.

Among this type of fatty-chain anionic polymers, there will be used more particularly polymers formed from a monomer mixture comprising: (i) essentially acrylic acid, (ii) an ester of formula (C) described above. above and in which R2 denotes H or CH3, R3 denoting an alkyl radical having from 12 to 22 carbon atoms,

(iii) and a crosslinking agent, which is a copolymerizable polyethylenic unsaturated monomer

well known, such as diallyl phthalate, allyl (meth) acrylate, divinylbenzene,

(poly) ethylene glycol dimethacrylate, and methylene-bis-acrylamide.

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 polymerizable crosslinking monomer, or those consisting of 98 to 96% by weight of acrylic acid (hydrophilic unit), 1 to 4% by weight of C 10 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 / α-olefin C30-C38 / 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 a carboxylic acid having α, 13-monoethylenic unsaturation, (b) 20 to 80% by weight of α-unsaturated monomer, 13 non-surfactant mono- ethylenic 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 at monoethylenic unsaturation, such as those described in the 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. Preferentially, these compounds also comprise, as monomer, a carboxylic acid ester with a, 13-monoethylenic unsaturation and a C1-C4 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 nonionic fatty-chain 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 comprising 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, 25 - 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 the company Rhone Poulenc. (3) copolymers of vinyl pyrrolidone and 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 GOLDSCHMIDT under the name denomination 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. (6) polymers having an aminoplast ether skeleton 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 most often of a polyoxyethylenated nature and hydrophobic sequences which may be aliphatic linkages alone and / or cycloaliphatic and / or aromatic linkages. Preferably, the polyurethane polyethers comprise at least two hydrocarbonaceous fatty chains, having from 8 to 30 carbon atoms, separated by a hydrophilic block, 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 Rohm & Haas [Aculyn 46 is a polyethylene glycol polycondensate containing 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 at 20% 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 content of organic thickeners, 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, the following compounds, alone or as a mixture: alkylsulphates, alkylethersulphates, alkylamidoethersulphates, alkylarylpolyethersulphates; alkylsulfonates, alkylamidesulfonates, alkylarylsulphonates; alkylsulfosuccinates, alkylethersulfosuccinates, alkylamide-sulfosuccinates; alkylsulfoacetates; - acylsarconisates; and the 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.

With regard to 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 groups ethylene oxide 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; 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 such as tetraalkylammonium, alkylamidoalkyltrialkylammonium, trialkylbenzylammonium, trialkylhydroxyalkylammonium, alkylpyridinium chlorides or bromides; alkylimidazoline derivatives; 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 at least one anionic water-solubilising 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 dye composition in accordance with 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; penetrating agents, sequestering agents such as ethylenediamine tetraacetic or its salts; perfumes ; mattifying agents with, for example, titanium oxides; buffers; dispersants; film-forming agents; ceramides 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 keratin fibers, preferably comprises water and optionally one or more organic solvents. This or these solvents may be only the compound (s) of formula (I). Additional solvents may also be included such as, for example, C 2 -C 4 linear or branched alkanols, 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, (C1-C4) alkylpyrrolidone, especially N-methylpyrrolidone; alkylene carbonates such as propylene carbonate, 5 or 6-membered lactones such as γ-caprolactone, and mixtures thereof. The additional solvent or solvents may be present in proportions ranging preferably from 1 to 40% by weight relative to the total weight of the dye composition, and still more preferably from 5 to 30% by weight.

It is not excluded, although not preferred, to use as additional solvent aromatic alcohols such as benzyl alcohol, benzyloxyethanol or phenoxyethanol. However, if they are present, their content is more particularly between 0.01 and 10% by weight, and preferably between 0.01 and 5% by weight, relative to the weight of the composition. It should also be noted that the quantity of water in the composition according to the invention is advantageously between 50 and 89.8% by weight relative to the weight of the composition.

The pH of the composition according to the invention is generally between 2 and 10, more particularly between 2 and 7 and preferably between 2 and 5. It can be adjusted to the desired value by means of one or more acidifying agents or one or more alkalinizing 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 Wherein 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 comprise one or more oxidizing agents. In particular, the oxidizing agent is chosen from hydrogen peroxide, urea peroxide, alkali metal bromates or ferricyanides, peroxygenated salts, for example

for example, persulfates, perborates and percarbonates of alkali or alkaline earth metals, such as sodium, potassium and magnesium. Preferably the oxidizing agent is hydrogen peroxide. Another subject of the invention consists of a method for dyeing keratinous fibers, which consists in applying the composition described above. According to a variant of the invention, the composition which has just been detailed and which is obtained by extemporaneous mixing before application, of a first composition comprising the acid direct dye (s), and a second composition comprising one or more compounds of formula (I) detailed above, said mixture comprising at least 10% by weight of compounds of formula (I), relative to the weight of the composition. According to a second variant of this embodiment, the first composition and the second composition are applied, successively and without intermediate rinsing, in one order or the other. It should be noted that the composition applied to the fibers may comprise one or more oxidizing agents.

Whichever variant is chosen (use of a composition obtained or not by extemporaneous mixing or application of several compositions), the composition according to the invention applied to the fibers is left in place for a duration, in general, of the order from 1 minute to 1 hour, preferably from 10 minutes to 30 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.

Finally, a last subject of the invention consists of a multi-compartment device, comprising in a first compartment a first composition comprising one or more acid direct dyes, in another compartment, a second composition comprising one or more compounds of formula ( I) as described above, so that the mixture of the compositions contained in the two compartments contains at least 10% by weight of compounds of formula (I):

What has been detailed previously about the compositions remains valid and will not be repeated here. Concrete but non-limiting examples of the invention will now be presented.

Example 1

The following composition was prepared (contents expressed in grams of active material): Acid Orange 7 0.5 HO NaO3S ON = NOO Ethylene sulfite (1,3,2-dioxathiolane 2-oxide) Citric acid qs pH 2.7 Demineralized water qs 100 This composition was applied to locks of natural hair or permed 90% white, for 30 minutes at room temperature. After the break time, the locks were rinsed, shampooed and then rinsed and dried. They have been dyed in a powerful and unselective orange shade.

Example 2 Acid Red 52 0.5 SO3 Na + SO3 J Ethylene sulfite (1,3,2-dioxathiolane 2-oxide) Citric acid qs pH 2.7 Demineralized water qs 100 This composition was applied to hair strands natural or 90% permed of white, for 30 minutes at room temperature. After the break time, the locks were rinsed, shampooed and rinsed and dried. They were dyed in a fuchsia nuance powerful and not very selective. EXAMPLE 3 The following composition was prepared (contents expressed in grams of active material): The following composition (contents expressed in grams of active material) was prepared: Acid Red 18 0.5 HO OIS Na, SO 3 Na + Ethylene sulfite (1 , 3,2-dioxathiolane 2-oxide) 11 Ethanol Citric acid qs pH 2.7 Demineralized water qs 100 This composition was applied to strands of natural hair or permed to 90% of whites, for 30 minutes at room temperature. After the break time, the locks were rinsed, shampooed and then rinsed and dried. They were dyed in a powerful red shade.

EXAMPLE 4 Acid Violet 010 43 O CH3 0.2 O NaO3S O HN OH Ethylene sulfite (1,3,2-dioxathiolane 2-oxide) 11 Ethanol 10 Citric acid qs pH 2.7 Demineralized water qs 100 This composition was applied to strands of natural hair or permed at 90% white, for 30 minutes at room temperature. After the break time, the locks were rinsed, shampooed and rinsed and dried. They were dyed in a powerful and homogeneous blue shade.

EXAMPLE 5 The following compositions were prepared (contents expressed in grams of active material): The following composition was prepared (contents expressed in grams of active material): Composition 1 Composition 2 Comparative Invention Acid Orange 7 HO NaO3Su ON = NO 1 1 O Ethylene sulfite 5 11 Water qs 100 qs 100 Each of these coloring compositions is applied to strands of hair permed with 90% of white hair for 30 minutes at room temperature. After the break time, the locks were rinsed, shampooed and rinsed and dried.

They were dyed in an orange shade.

Staining of the locks was measured using a Minolta 10 spectrophotometer in the CIE Lab system. The chromaticity of the coloring is then evaluated according to the following calculation formula: ## EQU2 ## Formula in which a * o and b * o correspond to the coefficients obtained on the locks of colored hair. The higher the value of C *, the better the chromaticity of the coloring.

The colorimetric results are summarized in the following table: Composition 1 comparative Composition 2 invention

It can be seen that the composition according to the invention makes it possible to have more chromatic colorations than the comparative composition. 50 57.4 15

Claims (11)

REVENDICATIONS1. Dye composition comprising, in a cosmetically acceptable medium, (i) one or more acid direct dyes and (ii) at least 10% by weight, relative to the total weight of the composition, of one or more compounds of formula (I) in which: R 1, R 2, R 3, which may be identical or different, represent a hydrogen atom, a C 1 -C 4 alkyl radical or a phenyl radical; n is 0 or 1. 10 2. Composition according to the preceding claim, characterized in that in formula (I) n denotes 0. 3. Composition according to any one of the preceding claims, characterized in that the compound of formula (I) is 1,3,2-dioxathiolane 2-oxide. 4. Composition according to any one of the preceding claims, characterized in that the compound (s) of formula (I) are present in a content of between 10 and 50% by weight, relative to the weight of the composition. 20 5. Composition according to any one of the preceding claims, characterized in that the acid direct dyes are chosen from azo direct dyes; anthraquinone; heteroanthracenic; triarylmethane. 6. Composition according to any one of the preceding claims, characterized in that the content of direct dye (s) acid (s) varies from 0.001 to 10% by weight, relative to the weight of the composition. 7. Composition according to any one of the preceding claims, characterized in that the weight ratio compound (s) of formula (I) / direct dye (s) acid (s) is greater than or equal to 10. 8. Composition according to any one of the preceding claims, characterized in that the pH of the composition is between 2 and 10. 35 9. Composition according to any one of the preceding claims, characterized in that it contains a plurality of oxidizing agents. 10. A dyeing method of applying to the human keratin fibers, a composition according to any one of the preceding claims. 11. Multi-compartment device, comprising in a first compartment a first composition comprising one or more acid direct dyes, in another compartment, a second composition comprising one or more compounds of formula (I) as described in claims 1 to 3 , so that the mixture of the compositions contained in the two compartments contains at least 10% of compounds of formula (I).