The invention relates to a composition for dyeing keratin fibres, and in particular human keratin fibres such as the hair, comprising 2,3-diamino.-6,7-dihydro-1H,5H-pyrazolo[l,2-a]pyrazol-l-one as first oxidation base, 6-ehloro-2-raethyl-5-ami.Rpphenol as first coupler and a substituted meta-aminophenol as second coupler.
It is kriown practice to dye keratin fibres, and in particular human keratin fibres such as the hair, with dye compositions comprising oxidation dye precursors, in particular ortho- or para-phenylenediamines, ortho-or para-aminpphenols, and heterocyclic compounds such as diaminopyrafcdle derivatives, pyrazolo[l,5-a]-pyrimidinia derivatives, pyriitddine derivatives, pyridine derivatives, indole derivatives and indoline derivatives, which are generally known as oxidation bases. Oxidatioh dye precursors, or oxidation bases, are colourless or weakly coloured compounds that, when combined with oxidizing products, can give rise to dyes or coloured compounds via a process of oxidative condensation. Permanent colorations are thus obtained.
It is also known that the shades obtained with these oxidation bases may be varied by combining them with couplers or coloration modifiers, the latter being chosen especially from meta-phenylenediamines, meta-amihopheno'ls;, meta-hydrpxyphenols and certain heterocyclic compounds.
The variety of^molecules used as regards the oxidation bases and couplers allows a wide range of colours to be obtained. The use of oxidation bases such as para-phenylene-
diamine and para-aminophenol derivatives allows a quite broad range of colours to he obtained at basic pH without, however, achieving shades with good chromaticity, while at the same time giving the hair excellent properties in term's of strength of colour, uniformity .of the colour and fastness with respect to external agents.
The use of these bases at neutral pE does not allow a varied range of shades to be produced, in particular for warm shades; such as red? and oranges.
The aim of the present invention is to provide novel compositions for1 dyeing keratin fibres that make it possible to obtain a strong, chromatic, aesthetic and sparingly selective coloration in coppery shades, which shows good resistance to the various attacking factors to which the hair may be subjected, such as shampoo, light, sweat and permanent reshaping operations.
One subject of the present invention is thus a composition for dyeing keratin fibres, comprising, in a suitable medium:
• .at least one first oxidation .base chosen from 2,3-dismino-6,7-dihydro-lH, 5H-pyrazolo[l, 2-a]pyraz.ol-l-one of formula (I) below, and the addition salts thereof:

• at least one first coupler chosen from 6-chloro-2-
methyl-5-aminophenol, and the addition salts thereof;
and
• at least one second coupler chosen from the
substituted meta-aminophenols of formula (II) below,
and the addition salts thereof:

in which:
RI and Ri, whiph may be identical or different,
represent a hydrogen atom; an alkyl radical; a
monohydroxyalkyl radical; a polyhydroxyalkyl radical; a
monoarainoalkyl radical; or
Ri and Rz form, together with the nitrogen atom to which
they are attached, a saturated or unsaturated, 5- to 7-
membered cyclic group containing one or more
heteroatoms/ which may be unsubstituted or substituted
with one or more radicals chosen from carboxyl,
carhoxamido, hydroxyl, amino, monoalkylamino and
dialkylamino radicals, and alkyl radicals optionally
substituted with one or more hydroxyl, amino,
monoalkylamino or dialkylamino radicals;
R;3 represent, independently of each other, a halogen
atom; an alkyl radical; an alkoxy radical; a
monohydroxyalkyl radical; a polyhydroxyalkyl radical; a
monohydroxyalkoxy radical; a polyhydroxyalkoxy radical;
n is an integer between 0 and 4;
with the proviso that:
when n is equal to 0, then at least one of the radicals
RI and Ra is other than a hydrogen atom;
when n is equal to 2 and Rj represent a methyl radical
and a chlorine atom, respectively, in positions 2 and
6, then RI and RZ do not simultaneously represent a
hydrogen atom;
it being understood that the first oxidation base/first
coupler mole ratio is less than 1.5, the first
oxidation base/second coupler rtole ratio is greater
than 1 and the molar amount of the first oxidation base
is greater than or equal to 2.5xlQ~3 mol per 100 g of
composition.
The present invention allows keratin fibres to be
coloured in coppery shades, in particular a coloration, on natural or permanent-waved grey hair containing 90% white hairs having, according to the CIELab notation, a value for L* of leas than or equal to 50, a value for a* of greater than or egual to 20, preferably greater than or equal to 25, and even more preferably between 25 and 50, a value for b* of greater than or equal to 20, preferably greater than or equal to 25, and even more preferably between 25 and 50 and a ratio b*/a* of between 0.5 and 1.5 and preferably between 0.7 and 1.2.
The present invention also makes it possible to obtain a strong, very chromatic, aesthetic, sparingly selective coloration that shows good resistance to the various attacking factors to: which the hair may be subjected, such as shampoo, light, sweat and permanent reshaping operations. The invention furthermore makes it possible ;to obtain an intense coloration at neutral pH.
Another subject of the invention is a process for dyeing keratin fibres using the composition of the present invention', and also the use of this composition for dyeing keratin fibres.
Finally, a subject of the invention is a dyeing kit coriipidsing, firstly, a dye composition containing 2,3-diamino-6,7-dihydfo-lH, 5H-pyrazolo[lr 2-a]pyrazol-l-one as oxidation base, 6-chloro-2-methyl-5-aminophenol as first coupler and a substituted meta-aminophenol as second coupler, and, secondly, a composition containing an oxidizing agent.
The CIELab notation used in the context of the invention defines a eolorimetric space in which each colour is defined1, by three parameters (L*, a*, b*J . The parameter L* reflects the lightness of the colour, the value L* being equal to 0 for black and equal to 100 for absolute white. The higher the value of L*, the
legs: intense the coloration. The parameter a* corresponds to the axis of the green/red antagonist pair. The parameter 'b* corresponds to the axis of the blue/yelLow antagonist pair.
Unless otherwise indicated, the limits of the ranges of values given in the context of the present invention are included in these ranges.
In the context of the invention, the term *alkyl radical" means, uhless otherwise indicated, linear or branched CI-CK>, preferentially GI-CS and even more preferentially Ci-Cj, alkyl radicals, such as methyl, ethyl, propyl, isopropyl, isobutyl, tert-butyl, pentyl ar hexyl radicals.
In the context of the present invention, the heteroatoms (s) may be chosen, from an oxygen atom, a nitrogen atom, a sulfur atom and a phosphorus atom.
In the context of the present invention, a halogen atom. may be chosen from a chlorine atom, a bromine atom, an iodine atom and a fluorine atom.
According to .one particular embodiment of the invention, RI. and &z represent, independently of each other, a hydrogen atom; an alkyl radical such as a methyl or ethyl radical; a monohydroxyalkyl radical such as a fj-hydroxyethyl or y-hy.droxypropyl radical; or RI and R2 form, together with the nitrogen atom to which they are attached., a ring chosen from pyrrolidine, piperidine, homopiperidine, piperazine, homopiperazine and morphdline heterecycles; the said rings possibly being substituted with one or more hydroxyl, amino, mono(Ci-C2)a.lkylaraino, di(Ci-C2>alkylamino, carboxyl or carboxamido radicals, or C],-C« alkyl radicals optionally substituted with pne or more hydroxyl, amino, mono(Gi-CzJ alkylamino or dKCi-Cj) alkylamino radicals, and more particularly chosen from pyrrolidine, 2,5-
dime thy Ipyrrolidlne, pyrrolidine-2-ca.rboxylic acid.,
3-hydroxypyrrolidine-2-carboxylic acid, 4-hydroxypyr-
rolidine-2-carboxylic acid, 2,4-dica.rboxypyrrolidine,
3-hydroxy-2-hydroJcymethylpyrrolidine, 2-carb.oxamido-
pyrrolidine, 3-hydroxy-2-.carboxamidbpyrrolidine, 2-
hydroxymethylpyrrolidine,. 3,4-dihydroxy-2-
hydroxymethylpyrrolidirie, 3-hydrsxypyrrolidine, 3,4-dihydraxypyrrplidine, S-aminopyrrolidine, 3-methyl-arainopyrrolidine, 3-dimethylaminopyrrolidine, 4-atnino-3-h.ydrqxypyrrolldine, 3-hydroxy-4- (p-hydroxyethyl) -aminopyrrolidine/ piperidine, 2,6-dimethylpiperidine, 2-carboxypipexidine, 2-oarboxamidopiperidine/ 2-hydroxymethylpiperidi'rie, 3-hydroxy-2-hydroxymethyl-piperidine, B-hydroxypiperidine, 4-hydroxypiperidine, 3-hydroxymethylpiperidine, homopiperidine, 2-carboxy-homopiperidine, ^-carboxamidohomopiperidine, homo-piperazine, N-methylhomopiperazine, N-(2-hydroxy-ethyl)hoinopiperazine, piperazirxe, 4-methylpiperazine, 4-ethylpiperazine, 4-(p-hydroxyethyl)piperazine and morpheline, and they more particularly form the following group: pyrrolidin-1-yl; piperidin-1-yl; piperazln-1-y.l; 4-methylpiperazin-l-yl; 4-ethylpiper-azin-1-yl; 4-(p-hydfoxyethyl)piperazin-l-y.l; morpholin-4-yl.
According to one particular embodiment of the invention/ RS is chosen from a halogen atom, an alkyl radical, ah alkoxy radical and a monohydroxyalkoxy radical. By Way of example, Rj is chosen, from a chlorine atom, a methyl radical, a me.thoxy radical and a JJ-hydroxye thy lossy radical.
According to one particular embodiment of the invention, n is between 0 and 2. By way of example, n is equal tq 1 or 2. When n is equal to 1, RS may be in position 2 and when n is equal to 2, Rs may be in positions 2 and 4.
Among the substituted meta-amihophenols of formula (II)

that are useful in the context of the invention,
mention may be made more particularly of. 5-amino-2-
methoxyphejiol; 5-amino-2-(:p-hydroxyethyloxy)phenol; 5-
ainino-2-methylphenol; 5-N- [p-hydroxyethyl) aniino-2-
methylphenol; 5-N-{p-hydroxyethyl)amino-4-methoxy-2-
riiethylphenol; N 5-amino-4-methoxy-2-methylp.henol; 5-
amino-4-chloro-2-iaethylphenol; 5-amino-2,4-
ditfiethoxyphenol; 5-(y-hydroxypropylamino)-2-
methylphenol; 3-dimethylarai.nophenol; 2-roethyl-5-
dimethylajninophenol; 2-ethyl-5-diitiethylaminophenol; 2-
methoxy-5-diroethylaminophenol; 2-ethoxy-5-
dimethylaminophenol; 2-(p-hydroxyethyl)-5-dimethyl-aminbpheno.l; 3-diethylaminophenol; 2-methyl-5-diethyl-aminophenol; 2-ethyl-5-diethylaminbph6nol; 2-methoxy-5-diethylaminophenol; 2-ethoxy-5-diethylaininophenol; 2-(p-hydroxyethyl)-5-diethylaminophenol; 3-di(p-hydroxyethyl ) aminopheno.1; 2-methyl-5-di (p-hydroxyethyl) amino-phenol; 2-'ethyl-5~di (p-hydroxyethyl) aminophenol; 2 -raethoxy-5-di(p-hydroxyethyl)aminophenol; 2-ethoxy-5-di(p-hydroxyethyl)aainophenol; 2-(p-hydroxyethyl)-5-di(p-hydroxyethyl)aminophenol; 3-pyrrolidin-l-ylphenol; 2-inethyl-.5-pyrrolidin-l-ylphenol; 2-ethyl-5-pyrrolidin-1-ylphertol; 2-methoxy-5-pyrrplidin-l-ylphenol; 2-ethoxy-5-p.yrrolidin-l-ylphenol; 2- (p-hydroxyethyl] -5-pyrrolidin-1-ylphenol; 3-piperidin-l-ylphenol; 2-methyl-5-piperidin-l-ylpheTiol; 2-ethyl-5-piperidiJi-l-ylphenol; 2-methQxy-5-piperidin-l-ylphenol; 2-ethoxy-5-piperidih-1-yl'phenol; 2- (p-hydrpxyethyl) -5-piperidin-l-ylphenol; 3-piperazin-l-ylphenbl; 2-nLethyl-5-piperazin-1-ylphenol; 2-ethyl-5-piperazin-l-ylphenol; 2-methoxy-5-piperazin-l-ylphenol; 2-ethoxy-5-piperazin-l-yl-phenol; 2- (P-hydroxyethyl)-5-piperazin-l-ylphenol; 3-(4-methylpiperazin-l-yl) phenol; 2-itiethyl-5- (4-methyl-piperazin-1-yl)phenol; 2-ethyl-5-(4-methylpiperazin-l-yl) phenol; 2-mebhox.y-5- (4-methylpiperazin-l-yl) phenol; 2-ethoxy-5- (4-methylpiperazin-l-yl) phe:nol; 2- (P~ hydroxyethyl) -5- (4-me.thylpiperaz.in-l-yl) phenol; 3- (4-ethylpiperazin-l-yl)phenol; 2-methyl~5-(4-ethylpiper-azin-1-yl)phenol; 2-ethyl-5- (4-ethylpip.era2in-l-yl) -
phenol; 2-iftethoxy-5-(4-ethylpiperazin-l-yl)phenol; 2-ethoxy-5- (4-ethylpiperazin-l-yl)phenol; 2- ((3-hydroxy-ethyl) -5- (4-ethylpiperazin-1-yl)phenol; 3- (4- ((3-hydroxyethyl)piperazin-l-yl)phenol; 2-methyl-5- {4- ((3-hydroxyethyl)piperazin-l-yl)phenol; 2-ethyl-5- (4- (j3-hydroxyethyl)piperazin-l-yl)phenol; 2-methoxy-5~(4- (p-hydrpxyethyl)piperazin.-l-yl) phenol; 2-ethoxy-5- (4- ([}-hydrox'yethylj piperazin-1-yl) phenol; 2- {[3-hydroxyethyll -5-(4-(p-hydroxyethyl)piperazin-l-yl)phenol; 3-morpho-lin-4-ylphenol; 2-methyl-5-morpholin-4-ylphenol; 2-ethyl-5-m6rpholin-4-ylphenol; 2-methoxy-5-raorpholin-4-ylphenol; 2-ethoxy-5-morpholin-4-ylphenol; 2-(£-hydroxyethyl)-5-morpholin-4-ylphenol.
fimong the substituted meta-aminophenols of formula (II) mentioned above, .5-N-(p-hydroxyethylaraino)-2-methyl-phenol and 5-amino-2-methylphenol are particularly preferred.
In the composition in accordance with the present invention, the first oxidation base/first coupler mole ratio is less than 1.5. Preferably, the first oxidation base/first coupler iaole ratio is between 0.5 and 1..2.
In the composition in accordance with the present invention, the first oxidation base/second coupler mole ratio is greater than 1. Preferably, the first oxidation base/second coupler mole ratio is between 2 and 5.
The dye composition of the invention may contain at least otte second, oxidation base chosen from para-ami nopheno Is .
Among the para-aminophenols that may be used as oxidation .bases in the dye compositions in accordance with the invention, mention may be made especially of the compounds corresponding to formula (III) below, and the addition salts thereof:
in Which:
R< represents a hydrogen atom; a halogen atom; an alkyl radical; a monohydroxyalkyl radical; an alkpxyalkyl radical; an aminoalkyl radical; a. hydroxyalkylamino-alkyl radical;
RS represents a hydrogen atom; a halogen atom; an alkyl radical; a monohydroxyalkyl radical; a polyhydroxyalkyl radical; an aminoalkyl radical; a cyanoalkyl radical; an alkoxvalkyl radical/it being unders±ood that at least one of the radicals R4 or Rj represents a hydrogen atom.
Among the para-aminophenols of formula (III) above, mention may be made more particularly of para-aminophenol, 4-amino-3-methylphenol, 4-amino-3-fluoro-phenol, 4-amino-3-hyd±oxymethylphenol, 4-aroino-2-methylphenal, 4-amino-2-hydroxymethylphe7iol, 4-amino-2-methoxymethylphenol, 4-amino^2-aminomethylphenol, 4-amino-2-(p-hydroxyethylaminomethyl}phenol and 4-amino-2-fluorophenol. Para-aminophenol is particularly preferred.
The dye composition of the: invention may contain oxidation bases other than those that are useful in the present invention and conventionally used for the dyeing of keratin fibres.
The composition of the present invention may comprise, for example, at least one .oxidation base chosen from para-phenylenediamines, bis(phenyl)alkylenediamines, bis-para-aminophenols, ortho-aminophenols, ortho-phenylenediamines .and heterocyclic bases other than 2, 3-diatrdno-6,, 7-dihydro-lH, SH-pyrazolo [1, 2-a] pyrazol-1-
one, and the addition salts thereof.
Among the paxa-pihenyleftediamines that may be mentioned, f:qr example, are para-phenylenediamine, para-toluenediamine, . 2-chloro-para-phenylenediamine, 2, 3-dimethyl-para-phenylenediamin.e, 2,5-dimethyl-para-phenylenediamine, 2,6-diethyl-para-phenylenediamine, 2,5-dimethyl-para-phenylenedi.amine, 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 present in the composition of the invention is (are) each generally present in an amount of between 0.001% and 101 by weight approximately, and preferably between 0.005% and 6% by weight, relative to the total weight of the dye composition.
In general, the addition salts of the oxidation bases and of the couplers that may be used in the context of the invention are chosen especially from the addition salts with an acid, such as the hydrochlorides, hydrobromides, •. sulfates, citrates, succinates, tartrates, lactates, (Ci-G^alkylsulfonates, tosylates, benzenesulfonates* phosphates and acetates, and the
addition salts with a base, such as sodium hydroxide, potassium hydroxide, ammonia, amines or alkanolamines .
The medium that is suitable for dyeing, .also known as the dye support, is a cosmetic medium that generally consists of water or .a mixture of water and at least one organic solvent to dissolve the compounds which would not be. sufficiently soluble in water. As organic solvent, mention may be made, for example, of Ci~C4 lower alkanpls, such as ethanol and isoprbpanol; polyols and pplyol ethers such as 2-butoxyethanol, propylene glycol, propylene glycol monomethyl ether, die.thylene glycol monoethyl ether and monomethyl ether, as well as aromatic alcohols such as benzyl alcohol or phenpxyethanqi, and mixtures thereof.
The solvents are present in proportions preferably of between 1%: and. 40% by weight approximately relative to the total weight of .the dye composition, and even more preferentially between 5% and 30% by weight approximately .
dye composition in accordance with the invention can also contain various adjuvants conventionally used in compositions for dyeing the hair, such as anionic, cationic, nonionic, amphoteric or zw.itterionic surfactants or mixtures thereof, anionic, cationic, nonionic, amphoteric or zwitterionic polymers or mixtures thereof, inorganic or organic thickeners, and in particular anionic, cationic, nonionic or amphoteric associative. polymeric thickeners, antioxidants, penetrants, ; sequestrants, fragrances, buffers, dispersants, conditioning agents, for instance silicones, which may be volatile or non-volatile, and modified or unmodified, film-forming agents, ceramides, preserving agents and opacifiers.
The above adjuvants are generally present in an amount for each of them of between 0.01% and 20% by weight
relative to the weight of the dye composition.
Needless to say, a person skilled in the art will take care to select this or these optional additional compounds. such that the advantageous properties intrinsically associated with the oxidation dye composition in accordance with the invention are not, or are not substantially, adversely affected by the addition(s) envisaged.
The pH of the dye composition in .accordance with the invention is generally between about 3 and 12 and preferably between about 5 and 11. It. may be adjusted to the desired value using acidifying or basifying agents usually used in the dyeing of keratin fibres, or alternatively using standard buffer systems.
Among the acidifying agents that may be mentioned, for example, are inorganic or organic acids such as hydrochloric acid, orthophosphoric acid, sulfuric acid, catboxylic acids such as acetic acid, tartaric acid, citric acid and lactic acid, and sulfonic acids..
Among the basifying agents that may be mentioned, for example, are aqueous ammonia, alkaline carbonates, alkanolairiines such as mono-, di- and triethanolamine and derivatives thereof, sodium hydroxide, potassium hydroxide and the compounds of formula (IV) below:
in which W is a propylene residue that is unaubstituted or substituted with a hydrbxyl group oir a Ci-C4 alkyl radical; R», B&, Rc and Rd, which may be identical or different, represent a hydrogen atom, a Ci~C4 alkyl radical °^ a Ci-C* hydroxyalkyl radical.
The dye composition according to the invention may 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.
The process of the present invention is a process^ in which the composition according to the present invention as described above is applied to the fibres, and the colour is developed using an oxidizing agent. The colour may be developed at acidic, neutral or alkaline pH and the oxidizing agent may be added to the composition of the invention just at the time of use, or it may be used starting with an oxidizing composition containing it, which is applied simultaneously or sequentially to the composition of the invention. Preferably, this coloration is developed at neutral pH.
According to one particular embodiment, the composition according to the present invention is mixed, preferably at the time of use, with a composition containing, in a medium that is suitable for dyeing, at least one oxidizing agerjt, this oxidizing agent being present in an amount that'is sufficient to develop a coloration. The mixture obtained is then applied to the keratin fibres. After a leave-on time of 3 to 50 minutes approximately, preferably 5 to 30 minutes approximately, the keratin fibres are rinsed, washed with shampoo, rinsed again and then dried.
The oxidizing agents conventionally used for the oxidation dyeing of keratin fibres are, for example, hydrogen peroxide, urea peroxide, alkali metal bromates, persalts such as perborates and persulfates, peracids and oxidase enzymes, among which mention may be made of peroxidases, 2-electron oxidoreductases such as uricases, 'and 4-electron oxygenases, for instance laccases. Hydrogen perpxide is particularly preferred.
The oxidizing composition may also contain various
adjuvants conventionally used in compositions for dyeing the hair and as defined above.
The pH of the oxidizing composition containing the oxidizing agent is such that, after mixing with the dye composition, the pH of the resulting composition applied to the keratin fibres ranges preferably between 3 and 12 approximately and even more preferentially between 5 and. 11. It may be adjusted to the desired value by means of acidifying or basifying agents usually used in the dyeing of keratin fibres and as defined above.
The ready-to-use composition that is finally applied to the keratin fibres may be in various forms, auch as in the form of liquids, creams or gels or any other form that is suitable for dyeing keratin fibres, and .especially human hair.
[
A subject of the invention is also a multi-compartment dyeing device or "kit", in which a first compartment contains the dye composition of the present invention defined above with the exception of the oxidizing agent and a second compartment contains an oxidizing composition. This device 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.
A subject of the present invention is also the use, for the oxidation dyeing of keratin fibres, and in particular of huttian keratin fibres such as the hair, of a composition as defined above.
According to one particular .embodiment, the use of the composition in accordance with the invention on natural or permanentrwaved grey hair containing 90% white hairs makes it possible to obtain a coloration having, according to the ClELab notation, a value for L* of
less than or equal to 50, a value for a* of greater than or equal to 20, preferably greater than or equal to 25, even more preferably between 25 and 50, a value for .b* of greater than or equal to 20, preferably greater than or equal to 2.5, even, more preferably between 25 and 50 and a ratio b*/a* of between 0.5 and 1.5 and preferably between 0.7 and 1.2.
The examples that follow serve to illustrate the invention without, however, being limiting in nature.
EXAMPZ&S
Example 1;
Composition 1 below was prepared:

(Table Removed)
At the time of use, 1 part by weight of composition 1 is mixed with 1.5 parts by weight of a 25-volumes hydrogen peroxide solution at pH 2.2. A final pH of 9.6 is obtained.
The mixture obtained is applied to locks of natural or permanent-waved grey hair containing 90% white hairs. After a leave-on, time of 20 minutes at room temperature, the locks are rinsed, washed with a standard shampoo, rinsed again and then dried.
The hair coloration is evaluated visually. A coppery light blond shade is obtained.
The colour of the hair is measured using a Minolta CM 2002® spectrocolorimeter (illuminant D65 - 10° CSI) in the CIELab system. In this system, L* represents the lightness, a* the hue and b* the. saturation,
The results obtained are given in the table below.

(Table Removed)

WE CLAIM;-
1. Composition for dyeing, keratin fibres, comprising, in a suitable medium:
• at least one first oxidatipn .bat.se chosen from 2,3-
diamino-6,7-dihydro-lH, 5H-pyrazolo[l,2-a]pyrazol-l-one,
and the addition salts thereof;
• at least 'one first coupler chosen from 6-chloro-2-
methyl-5-amin.ophenol, and the addition salts thereof;
and
• at least one second coupler chosen from the
substituted meta-aminophenols of formula (II) below,
and the addition salts thereof:
in which:
RI and RZ, which rtay be identical or different,
represent a hydrogen atom; an alkyl radical; a
monohydroxyalkyl radical; a. polyhydroxyalkyl radical; a
monoarairioalkyl radical; or
R! and R2 form, together with the nitrogen atom to which
they are attached, a saturated or unsaturated, 5- to 7-
membered cyclic group containing one or more
heteroatoms, which may be unsubstituted or substituted
with one or more radicals choaen from carboxyl,
carboxamidp, hydroxyl, amino, monoalkylamino and
dialkylamino radicals, and alkyl radicals optionally
•substituted with one or more hydroxyl, amino,
monoalkylatnino or dialkylamino radicals;
R3 represent, independently of each other, a halogen
atom; an alkyl radical; an alkoxy radical; a
monohydroxyalkyl radical; a polyhydroxyalkyl radical; a
mpnohydroxyalkoxy radical; a polyhydroxyalkoxy radical;
n is an integer between 0 and 4;
with the proviso that:
when n is equal to 0, then at least one of the radicals
HI and R2 is other than a hydrogen atom; when n is equal to 2 and R3 represent a methyl radical and a chlorine atom, respectively, in positions 2 and 6, then RI and R2 do not simultaneously represent a hydrogen atom;
it being understood that the first oxidation base/first coupler mole ratio is less than 1.5, the first oxidation base/second coupler mole ratio is greater than 1 and the molar amount of the first oxidation base is greater than or equal to 2.5xl0-3 mol per 100 g of composition,
2. Composition according to Claim 1, in which RI and
Rz represent, independently of each other, a hydrogen
atom; an alkyl radical; a monohydroxyalkyl radical; or
RI and R2 form, together with the nitrogen atom to which
they are attached, a ring chosen from pyrrplidine,
piperidine, 'hpmopiperidine, piperazine, hombpiperazine
and morpholine; heterocycles; the said rings possibly
being substituted with one or1 more hydroxyl, amino,
monpfC1-C10 alkylamino, diC1-C2alkylamino, carboxyl or
carboxamido radicals, or C1-C4 alkyl radicals optionally
substituted with one or more hydraxyl, amino, mono(C1-
C2)alkylamino or di (C1-C2)alkylamino radicals.
3. Composition according to Claim 1 or 2, in which RS
is chosen from a halogen atom, an alkyl radical, an
alkoxy radical and a inonohydroxyalkoxy radical.
4. Composition according to any one of the preceding
claims, in which n is between 0 and 2.
5. Composition according to any one of the preceding
claims, in which the substituted meta-aminophenol(s) of
formula (II) is (are) chosen from 5-amino-2-
methoxyphenol; 5-amino-2-(p-hydroxyethyloxy)phenol; 5-
aminb-2-methylphenol; 5-N-(β-hydroxyethyl)amino-2-
methylphenol; 5-N- (β-hydroxyethyl) amin.6-4-methoxy-2-
methyiphenol; .5-amino-4-me.thoxy-2-methylphenol; 5-
amino-4-ehloro-2-methylphenol; 6-chloro-2-methyl-5-aminophenol; 5-amino-2,4-dimethoxyphenol; 5-(y-hydroxy-propylamino)-2-m.ethylp'henol; 3-dimethylaminophenol; 2-methyl-5-dimethylaminophenol; 2-ethyl-5-dimethylairu.no-phenol; 2-methoxy~5-dimethylaminophenol; 2-ethoxy-5-dimethylaminaphenol; 2-(β-hydroxyethyl)-5-dimethyl-aminophenol; 3-diethylaminophenol; 2-methyl-5-diethyl-aminophenol; 2-ethyl-5-diethylarainophenol; 2-methoxy-5-diethyiaminophenol; 2-ethoxy-5-diethylaininophenol; 2-(p-hydroxyethyl)-5-diethylaminophenol; 3-di(p-hydroxy-
I
ethyl) aminophenol; 2-icethyl-5-di (. p-hydroxyethyl} .aminophenol; 2-ethyl-5-di(β-hydroxyethyl) aminophenol; 2-methoxy-5-di(β-hydroxyethyl)aminophenol; 2-ethoxy-5-di(p-hydroxyethyl)aminophenol; 2-(β-hydroxyethyl)-5-di(β-hydroxyethyl)aminophenol; 3-pyrrolidin-l-ylphenol; 2-methyl-5-pyrrolidin-l-ylphenol; 2-ethyl-5-pyrrolidin-1-ylphenol; 2-methoxy-5-pyrrolidin-l-ylphenol; 2-ethoxy-5-pyrrolidin-l-ylphenol; 2-(β-hydroxyethyl)-5-pyrrolidin-l^ylphenol; 3-piperidin-l-ylphenol; 2-methyl-5-piperidin-l-ylphenol; 2-e.thyl-5-piperidin-l-ylphenol; 2-methoxy-5-piperidin-l-ylphenol; 2-ethoxy-5-piperidin-1-ylphenol; '2-(p-hydroxyethyl)-5-piperidin-l-ylphenol; 3-p±petazifl-l-ylphenOl; 2-niethyl-5-piperazin-1-ylphenol; 2-ethyl-5-piperazin-l-ylphenol; 2-methoxy-5-piperazin-l-ylphenol; 2-ethoxy-5-piperazin-l-yl-phenol; 2- (p-hydroxyethyl)-5-piperazin-l-ylphenol; 3-(4-nethylpipe.r.azin-l-yl)phenol; 2-methyl-5- (4-methylpiperazin-l-yl) phenol; 2-ethyl-5-(4-methylpiperazin-l-yl)phenol; 2-methoxy-5-(4-methylpiperazin-l-yl)phenol; 2-ethoxy-5-(4-methylpiperazin-J-yl)phenol; 2-(p-hydroxyethyl)-5-(4-methylpiperazin-l-yl)phenol; 3-(4-ethylpiperazin-1-ya)phenol; 2-methyl-5-(4-ethylpiper-azin-1-yl)phenol; 2-ethyl-5-(4-ethylpiperazin-l-yl)-phenol; 2-methoxy-5-(4-ethylpiperazin-l-yl)phenol; 2-ethoxy-5-(4-ethylpiperazin-l-yl)phenol; 2-(p-hydroxyethyl) -5-(4-ethylpiperazin-l-yl)phenol; 3-(4-(p-hydroxyethyl) piperazin-1-yl) phenol; i2-methyl-5- (4- (P~ hydroxyethyl)piperazin-1-yl)phenol; 2-ethyl-5-(4-(P~ hydroxyethyl)piperazin-1-yl)phenol; 2-methoxy-5- (4- (p-
hydroxyethyl) piperazin-1-yl) phenol; 2-ethoxy-5- (4- ({5-hydroxyethyl)piperazin-1-yl)phenol; 2-(β-hydroxyethyl)-5-(4-{β-hydroxyethyl)piperazin-1-yl)phenol; 3-raorpho-lin-4-ylpheriol; 2-methyl-5-morpholin-4-ylphenol; 2-ethyl-5-moTpholin-4-ylphenol7 2-methoxy-5-morpholin-4-ylphenol; 2-ethoxy-5-morpbolin-4-ylphenQl; 2-(|3-hydroxyethyl}-5-morpholin-4-ylphenol.
6. Composition according to Claim 5, in which the
substituted meta-aminophenol(a) of formula (II) is
(are) chosen from 5-N-(β-hydroxyethylamino)-2-
methylphenol and 5-amino-2-methylphenol.
7. Composition according to any one of the preceding
claims, in which the first oxidation base/first coupler
mole ra'tio is between Q..5 and 1.2.
8. Composition according to any one of the preceding
claims, in which the first oxidation base/second
coupler mole ratio is between 2 and 5.
9. Composition according to any one of the preceding
claims, comprising at least one second oxidation base
chosen from para-aminophenols.
10. Composition according to Claim 9, in which the
para-aminophenol{s) is (are) chosen from the compounds
corresponding to formula (III) below, and the addition
salts thereof:
R« represents a: hydrogen atom; a halogen atom; an alkyl radical; a monbhydroxyalkyl radical; .an alkoxyalkyl radical; an aminoalkyl radical; a hydroxyalkylamino-
alkyl radical;
R5 represents a. hydrogen atom; a halogen atom; an alkyl radical; a monohydroxyalkyl radical; a polyhydroxyalkyl radical; an aminoalkyl radical; a cyarioalkyl radical/an alkoxyalkyl radical; it being understood that at least one of the radicals R4 or R5 represents a hydrogen atom.
11. Composition according to Claim 10, in which the
pafa-ajnino;phenol(s) of formula (III.) is (are) chosen
from para-aminophenbl, 4-amino-3-methylphenol, 4-amino-
3-fluorophenol, 4-arai:no-3-hydroxymethylphenol, 4-smino-
2-methylphenol, 4-aminb-2-hydroxymethylphenol, 4-amino-
2-methox.ymethylphenol, 4-araino-2-aminomethylphenol, 4-
amino-2-(β-hydroxyethylaminoraethyl.) phenol and 4-amino-
2-fluorophenolV
12. Composition according to any one of the preceding
claims, also comprising an oxidizing agent.
13. Process for dyeing k-eratin fibres, characterized
in that a composition as defined in any one of Claims 1
to 11 is applied to the keratin fibres in the presence
of an oxidizing agent, for a time that is sufficient to
develop the desired coloration.
14. Multi-compartment device, in which. a first
compartment contains a dye composition as defined in
any one of .Claims 1 to 11 and a second compartment
contains an oxidizing agent.
15. Use, for the oxidation dyeing of keratin fibres,
of a composition as defined in any one of Claims 1 to
12.
16. Use according to Claim 15, for obtaining a
coloration on natural or permanent-waved grey hair
containing 90% white hairs having, according tp the
CIELab notation, a value for L* of less than or equal
to 5.0, a value for a* of greater than or equal to 20, a value for b* of greater than or equal to 20 and a ratio b*/a* of between 0.3 and 1.5.