Abstract: The invention relates to a composition for the oxidation dyeing of keratin fibers, and in particular human keratin fibers such as the hair, having, in a medium suitable for dyeing, at least one oxidation base and at least one specific cationic dye as direct dye, as well as to the dyeing process using this composition.

Abstract: The invention relates to a ready-to-use composition for the oxidation dyeing of keratin fibres, and in particular human keratin fibres such as the hair, comprising, in a medium which is suitable for dyeing, at least one oxidation base, at least one substituted meta-phenylenediamine as first coupler, at least one second coupler chosen from meta-aminophenols and meta-diphenols and at least one enzyme of 2-electron oxidoreductase type in the presence of at least one donor for the said enzyme, and to the dyeing process using this composition.

Abstract: The invention relates to a composition for dyeing keratin fibers, in particular human keratin fibers such as the hair, comprising at least one cationic direct dye of given formula and at least one thickening polymer chosen from nonionic guar gums, biopolysaccharide gums of microbial origin, gums derived from plant exudates, pectins, alginates, starches, and carboxyalkylcelluloses. The invention also relates to the dyeing processes and dyeing devices using the composition.

Abstract: The invention relates to a ready-to-use composition for the oxidation dyeing of keratin fibers, and in particular human keratin fibers such as the hair, comprising, in a medium which is suitable for dyeing, at least one oxidation base, at least one substituted meta-phenylenediamine as first coupler, at least one second coupler chosen from meta-aminophenols and meta-diphenols and at least one enzyme of 2-electron oxidoreductase type in the presence of at least one donor for the said enzyme, and to the dyeing process using this composition.

Abstract: The present invention relates to a composition for dyeing keratinous fibres, especially human hair, which in a medium appropriate for dyeing comprises:

Abstract: Monobenzenic ortho-phenylenediamines comprising at least one cationic group Z, Z being chosen from aliphatic chains, comprising at least one quaternized unsaturated ring, to their use for the oxidation dyeing of keratin fibers, to dye compositions containing them and to oxidation dyeing processes using them.

Abstract: A compostion for the dyeing of keratinous fibres comprising, in a medium appropriate for dyeing keratinous fiber contains: as coupler, at least one compound of formula: in which R1 denotes in particular hydrogen, halogen, aryloxy, alkoxy, acyloxy, arylthio, alkylthio, acetamido; an NRIIIRIV radical with RIII and RIV representing a C1-C4 alkyl, and the like; Za, Zb, and Zc represent, independently of one another, a nitrogen atom or else a carbon atom carrying an R2, R3 or R4 radical; provided that: when Za denotes a carbon atom carrying an R2 radical, Zb represents a nitrogen atom and Zc denotes a carbon atom carrying an R3 radical; when Za denotes a nitrogen atom, Zb represents a carbon atom carrying an R4 radical and Zc dentoes a nitrogen atom; R2, R3 or R4=H, C1-4 alkyl, aryl; n is 1 or 2: and at least one oxidation base.

Abstract: The invention relates to novel compositions for the oxidation dyeing of keratin fibers, comprising at least one specific diaminopyrazole derivative, to the dyeing process using this composition, to novel diaminopyrazole derivatives and to a process for their preparation.

Abstract: Compositions for oxidation dyeing of keratin fibers comprising at least one oxidation base and at least one coupler chosen from indolizine derivatives, methods for using the same for oxidation dyeing of keratin fibers, and compounds chosen from indolizine derivatives.

Abstract: Provided is a hair dye composition comprising a direct dye (1):

Abstract: The invention relates to a ready-to-use composition for the oxidation dyeing of keratin fibres, and in particular human keratin fibres such as the hair, comprising, in a medium which is suitable for dyeing, at least one oxidation base, 2-amino-3-hydroxypyridine as coupler and at least one enzyme of 2-electron oxidoreductase type in the presence of at least one donor for the said enzyme, and to the dyeing process using this composition.

Abstract: Provided is a hair dye composition comprising as a direct dye a compound represented by the following formula (1), (2), (3) or (4): 1

Abstract: The invention relates to a ready-to-use composition for the oxidation dyeing of keratin fibers, and in particular human keratin fibers such as the hair, comprising, in a medium which is suitable for dyeing, at least one oxidation base, 2-amino-3-hydroxypyridine as coupler and at least one enzyme of 2-electron oxidoreductase type in the presence of at least one donor for the said enzyme, and to the dyeing process using this composition.

Abstract: Compositions for oxidation dyeing keratinous fibers, for example, human keratinous fibers such as hair, comprising at least one oxidation base and at least one coupler chosen from N-(2-hydroxybenzene)carbamate and N-(2-hydroxybenzene)urea compounds and their acid addition salts of formula (I) and processes comprising such compositions.

Abstract: Dye compositions comprising (1) at least one colorant chosen from oxidation dyes and direct dyes, wherein said oxidation dyes are chosen from bases, couplers, and bases and couplers, and (2) at least one nonionic compound of the formula R—(OCH2CH2)n—OR′, wherein R is chosen from C10-C30 alkyl groups, and wherein R′ is chosen from C10-C30 alkyl groups optionally substituted with a hydroxyl group, and n is an integer ranging from 1 to 100. One use of such compositions is for the dyeing of at least one keratin fiber, such as human keratin fibers like hair. Processes and devices for dyeing using the aforesaid compositions.

Abstract: The subject-matter of the present invention is a composition for the oxidation dyeing of keratinous fibers, in particular of human keratinous fibers, such as hair, comprising 2-chloro-6-methyl-3-aminophenol as coupler, in combination with at least one suitably selected oxidation base and at least one additional coupler chosen from suitably selected meta-aminophenols and meta-phenylenediamines, and the dyeing process employing this composition with an oxidizing agent.

Abstract: The invention relates to novel 4-hydroxyindole derivatives comprising at least one cationic group Z, Z being selected from quaternized aliphatic chains, aliphatic chains containing at least one quaternized saturated ring, and aliphatic chains containing at least one quaternized unsaturated ring, to their use as a coupler for the oxidation dyeing of keratinous fibers, to the dyeing compositions comprising them, and to the methods of oxidation dyeing which employ them.

Abstract: The present invention relates to a composition for the dyeing of keratinous fibres, especially human hair, which comprises, in a medium appropriate for dyeing:

Abstract: The invention relates to novel compositions for the oxidation dyeing of keratinous fibres, comprising at least one 3-aminopyrazolo[1,5-a]-pyrimidine, to the method of dyeing which employs this composition, to novel 3-aminopyrazolo[1,5-a]pyrimidines and to the process for their preparation.

Abstract: The subject-matter of the present invention is a composition for the oxidation dyeing of keratinous fibres, in particular of human keratinous fibres, such as hair, comprising 2-chloro-6-methyl-3-aminophenol as coupler, in combination with at least one suitably selected oxidation base, and the dyeing process employing this composition with an oxidizing agent.

Abstract: The invention relates to novel dibenzene oxidation bases containing at least one cationic group Z, Z being chosen from quaternized aliphatic chains, aliphatic chains containing at least one quaternized saturated ring and aliphatic chains containing at least one quaternized unsaturated ring, to their use for the oxidation dyeing of keratin fibres, to dye compositions containing them and to oxidation dyeing processes using them.

Abstract: The invention relates to novel compositions for the oxidation dyeing of keratinous fibers, comprising at least one 3-aminopyrazolo[1,5-a]-pyrimidine, to the method of dyeing which employs this composition, to novel 3-aminopyrazolo[1,5-a]pyrimidines and to the process for their preparation.

Abstract: Method for dyeing keratinous fibers, in particular, human keratinous fiber such as hair, without the use of iodide ions wherein a tinctorial composition containing, in a cosmetically acceptable medium having a pH of less than or equal to 7, at least one indole derivative corresponding to the formula in which: R1 denotes hydrogen, alkyl or COOH; R2 denotes hydrogen or alkyl; R denotes hydrogen, Si(CH3)3, or COalkyl; and X denotes hydrogen, OH, or OSi(CH3)3; it being possible for X in the 4- or 5-position also to denote the O-alkyl group, on condition that when X is in the 5-position with the meanings mentioned above and OR denotes OH in the 4- or 6-position, only one of the group R1 and R2 then differs from hydrogen; that when X denotes hydrogen, OR must be in the 7-position and R2 must denote hydrogen; and that when R denotes hydrogen and X denotes OH, OR and X are then in the 5- and the 6-position and R1 denotes COOH, to the fibers in a first step and, after a dwell time followed by

Abstract: The present invention relates to a composition for the dyeing of keratinous fibres, especially human hair, which comprises, in a medium appropriate for dyeing: as coupler, at least one compound corresponding to one of the formulae: in which R1 is especially hydrogen, halogen, aryloxy, alkoxy, acyloxy, arylthio, alkylthio, heteroarylthio, heteroaryloxy, etc; R2 and R3 are independent and are especially hydrogen, halogen, alkyl, aryl, alkylthio, arylthio, benzylthio, etc; Za, Zb and Zc are independent and are a nitrogen atom or a carbon atom carrying a radical R4, R5, R6 or R7; R4, R6 and R7 are identical or different and are especially hydrogen, alkyl, aryl, a heterocycle, a halogen, etc; and R5 is especially hydrogen, halogen, acyl, acyloxy or carbamoyl, etc; and at least one oxidation base.

Abstract: The present invention relates to a composition for dyeing keratinous fibers, especially human hair, which in a medium appropriate for dyeing comprises: as coupler at least one compound of formula:  in which: R1 is especially hydrogen, alkyl, aryl, a heterocycle, a halogen, etc.; R2 is especially hydrogen, halogen, aryloxy, alkoxy, acyloxy, arylthio, alkylthio, heteroarylthio, heteroaryloxy, etc.; Za, Zb and Zc are independently a nitrogen atom or a carbon which carries a radical R3 or R4 whose meanings are identical to those of R1; at least one of Za, Zb and Zc is a nitrogen atom; and R3 and R4 may together form an unsubstituted or substituted aromatic ring; and at least one oxidation base.

Abstract: 5-Nitroisatin is reacted with sodium hydroxide to produce an &agr;-keto acid sodium salt that is reduced with borane-tetrahydrofuran complex and then hydrogenated to produce 1-(2,5-diaminophenyl)ethylene glycol, a novel compound useful as a primary intermediate in the production of oxidative hair dyes.

Abstract: The invention relates to a ready-to-use composition for the oxidation dyeing of keratin fibers, and in particular human keratin fibers such as the hair, comprising, in a medium which is suitable for dyeing, at least one oxidation base, at least one cationic direct dye and at least one enzyme of 2-electron oxidoreductase type in the presence of at least one donor for the said enzyme, and to the dyeing process using this composition.

Abstract: A hair dyeing composition achieving intensive, stable colorations, which can be varied by the addition of further coupling substances, contains an oxidation dyestuff system reacting with peroxide comprising a combination of a) 2-(2,5-diaminophenyl)ethanol of the water-soluble salts thereof, and b) 2,6-dichloro-4-aminophenol.

Abstract: The present invention relates to a composition for dyeing keratin fibers, in particular human hair, containing, in a medium which is suitable for dyeing: as coupler, at least one compound of formula: or one of the addition salts thereof with an acid; and at least one oxidation base.

Abstract: A colorant composition for coloring keratin-containing fibers is disclosed having (a) at least one isatin derivative corresponding to the formula I: where R1 and R2 independently of one another represent a hydrogen atom, a halogen atom, a hydroxy group, a (C1-4)-alkyl, hydroxy-(C1-4)-alkyl, tertiary amino-(C1-4)-alkyl, (C1-4)-alkoxy group, an amino group optionally substituted by one or two (C1-4)-alkyl or hydroxy-(C1-4)-alkyl groups, a nitro, carboxy, or sulfo group, and Y is a hydroxy group, a (C1-4)-alkoxy group or an amino group which may be substituted by (C1-4)-alkyl, (C1-4)-alkoxy-(C1-4)-alkyl, carboxy-(C1-4)-alkyl, sulfo-(C1-4)-alkyl or hydroxy-(C1-4)-alkyl groups or which may be part of a heterocyclic 5-, 6- or 7-membered ring, or physiologically compatible salts thereof, and (b) at least one compound containing a primary or secondary amino group or hydroxy group selected from the group consisting of primary or secondary aliphatic or aromatic amines, nitrogen-containing heterocyclic

Abstract: Compositions for the oxidation dyeing of keratin fibers, comprising, as oxidation base, at least one para-aminophenol, of formula (I) and/or at least one acid-addition salt thereof: in which: R1 represents a hydrogen atom, a linear or branched C1-C4 alkyl radical or a C1-C4 trifluoroalkyl radical, R2 and R3 independently represent a hydrogen atom, a C1-C4 alkyl radical or a C1-C4 monohydroxyalkyl radical, and X, Y and Z independently represent a carbon, nitrogen, oxygen or sulphur atom, wherein the bonds XY and YZ are single or double bonds; a dyeing process using these compositions, novel para-aminophenols and a process for their preparation.

Abstract: Couplers for hair coloring compositions for oxidative dyeing of hair are compounds of the formula at least one coupler comprising a compound of the formula: wherein R is selected from the group consisting of C1 to C2 alkyl and hydroxyethyl, R1 is selected from the group consisting of hydrogen, chlorine, bromine, C1 to C3 alkyl, C1 to C3 alkoxy, C1 to C3 hydroxyalkyl and C1 to C3 hydroxyalkoxy, and X is O, S or NH.

Abstract: Formulations for the oxidation dyeing of keratin fibers comprising a coupler and oxidation base. The couplers are represented by the following structure: wherein: Z represents the elements of C, N, O, or S necessary to complete a substituted or unsubstituted heterocyclic 5 or 6 member ring along with nitrogen; R1 represents a substituent group; and, X represents a hydrogen or a coupling off group.

Abstract: The present invention relates to a composition for dyeing keratin fibres, in particular human hair, containing, in a medium which is suitable for dyeing: as coupler, at least one compound of formula or one of the addition salts with an acid, with R1 denotes, in particular, hydrogen, alkyl, aryl, a heterocycle, halogen, R2 denotes, in particular, hydrogen, halogen, alkoxy, aryloxy, acyloxy, arylthio, alkylthio, R3 has the same meanings as those for R1, Za and Zb, which are different, denote C═O or CR4, with R4 having the same meanings as R1; and at least one oxidation base.

Abstract: Azo compounds of the 2-(4-amino)phenyldiazinecarboximidamide type and 2-(4-amino)phenylhydrazinecarboximidamide type, a process for their synthesis, their use for dyeing keratin fibers, dye compositions containing them, and dyeing processes.

Abstract: A 1,4-diazacycloheptane derivative and an oxidative hair colorant containing the derivative as a primary intermediate is presented. The 1,4-diazacycloheptane derivative is of the formula: ##STR1## where R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently of one another represent hydrogen, a C.sub.1-4 alkyl or hydroxyalkyl group or a C.sub.2-4, dihydroxyalkyl group, X and Y independently of one another represent hydrogen, chlorine, fluorine, a C.sub.1-4 alkyl, hydroxyalkyl, aminoakyl or alkoxy group, a C.sub.2-4 dihydroxyalkyl group or an allyl group and R.sup.5 and R.sup.6 independently of one another represent hydrogen or a C.sub.1-4 alkyl group. Natural color tones can be obtained in keratin fibers with oxidative hair colorants containing the 1,4-diazacycloheptane derivative, without the use of additional primary intermediates.

Abstract: The present invention relates to a composition for dyeing keratin fibers, in particular human hair, containing, in a medium which is suitable for dyeing, at least:as coupler, at least one compound of formula: ##STR1## in which: R.sub.1 denotes, in particular, hydrogen, alkyl, phenyl, substituted phenyl, cyano; carbonyl; etc.R.sub.2 denotes, in particular, hydrogen, halogen, alkoxy, aryloxy, acyloxy, acetamido, dialkylamino, etc.Z.sub.a and Z.sub.b denote a nitrogen atom or a carbon bearing a group R.sub.3 or R.sub.4 or R.sub.5, with the proviso that at least one of the two is a carbon atom;R.sub.3 and R.sub.4, which are independent, denote cyano; trifluoroalkyl; alkoxycarbonyl; aryloxycarbonyl, hydrogen; alkyl; carboxyl; etc.R.sub.5 denotes, in particular, hydrogen, aryl, alkoxy, alkylthio, etc.at least one oxidation base.

Abstract: The invention relates to a ready-to-use composition for the oxidation dyeing of keratin fibres, and in particular of human keratin fibres such as the hair, this composition comprising, in a medium which is suitable for dyeing, at least one oxidation base and bilirubin oxidase, in the presence or absence of at least one donor for the said bilirubin oxidase, as well as to the dyeing process using this composition.

Abstract: The present invention relates to a composition and dyeing process for the dyeing of keratinous fibers using the composition, where the composition has as coupler, at least one compound of formula: ##STR1## where R.sub.1 denotes in particular hydrogen, halogen; alkoxy, aryloxy; acyloxy; arylthio; alkylthio; an NR.sup.III R.sup.IV radical with R.sup.III and R.sup.IV, which are identical or different, representing a C.sub.1 -C.sub.4 alkyl, and the like; R.sub.2 denotes hydrogen; halogen; acyl; sulphonyl; sulphinyl; phosphonyl; carbamoyl; sulphamoyl; cyano; siloxy; amino; acylamino; acyloxy; carbamoyloxy; sulphonamido; imido; ureido; sulphamoylamino; alkoxycarbonylamino; aryloxycarbonylamino; alkoxycarbonyl; aryloxycarbonyl; carboxyl; alkyl; or aryl; or a 5- or 6-membered heterocycle having at least one nitrogen, oxygen or sulphur atom; when R.sub.

Abstract: New p-diaminobenzene derivative compounds of the formula (I): ##STR1## and physiologically compatible water soluble salts thereof are described, wherein X represents oxygen, sulfur, selenium or N-R9. Compositions for dyeing keratin fibers including a combination of coupler and developer substance are described, in which the developer substance includes at least one of the new p-diaminobenzene derivative compounds.

Abstract: Novel compositions for the oxidation dyeing of keratin fibres, comprising at least one specific pyrazolo[1,5-a]pyrimidine derivative, a dyeing process using these compositions, novel pyrazolo[1,5-a]pyrimidine derivatives and a process for their preparation.

Abstract: A hair treatment composition comprising a compound of Formula (1): ##STR1## wherein R.sup.1, R.sup.2, m and n are as defined in the disclosure; and a water-soluble macromolecule.

Abstract: The invention relates to novel compositions for the oxidation dyeing of keratin fibers, comprising at least one specific diaminopyrazole derivative, to the dyeing process using this composition, to novel diaminopyrazole derivatives and to a process for their preparation.

Abstract: The invention relates to a ready-to-use composition for the oxidation dyeing of keratin fibres, and in particular of human keratin fibres such as the hair, this composition comprising, in a medium which is suitable for dyeing, at least one oxidation base, choline oxidase, and at least one donor for the said choline oxidase, as well as to the dyeing process using this composition.

Abstract: The present invention relates to a composition for the oxidation dyeing of keratin fibers, in particular human keratin fibers such as the hair, comprising at least two oxidation bases which are different from each other in combination with a suitably selected indole coupler, and to the dyeing process using this composition with an oxidizing agent.

Abstract: A composition for the oxidation dyeing of keratin fibres, preferably comprising 2-amino-3-hydroxypyridine as first coupler in combination with an oxidation base chosen from para-phenylenediamines of formula (I) and/or para-aminophenols of formula (II), as well as a second coupler chosen from meta-aminophenol derivatives of formula (III), as well as to the dyeing process using this composition with an oxidizing agent.

Abstract: A composition for the oxidation dyeing of keratinous fibers, in particular of human keratinous fibers such as hair, with at least one 5-substituted 3,4-diaminopyrazole as an oxidation base, in combination with at least one meta-aminophenol halogenated at the ortho position of the phenol as a coupler, as well as a method of dyeing using this composition with an oxidizing agent.

Abstract: The invention relates to a ready-to-use composition for the oxidation dyeing of keratin fibers, and in particular of human keratin fibers such as the hair, this composition comprising, in a medium which is suitable for dyeing, at least one oxidation base, sarcosine oxidase, and at least one donor for the said sarcosine oxidase, as well as to the dyeing process using this composition.

Abstract: Hydraulic coupler compounds corresponding to the formula: ##STR1## in which R.sub.1 denotes a hydrogen atom or a C.sub.1 -C.sub.4 alkyl radical; R.sub.2 and R.sub.3, which may be identical or different, denote a hydrogen atom, a C.sub.1 -C.sub.4 lower alkyl radical, a carboxyl radical or an alkoxycarbonyl radical; X denotes a C.sub.1 -C.sub.4 lower alkyl radical, a C.sub.1 -C.sub.18 alkoxy radical, a halogen atom, a C.sub.1 -C.sub.20 acyloxy radical, an acetylamino group, a trimethylsilyloxy group or a dialkyl(C.sub.1 -C.sub.4)aminomethyl group, the OH group occupying the 6- or 7-positions, as well as their salts, are combined with oxidation dye precursors for dyeing keratinous fibers.

Abstract: Oxidation colorants which contain at least one secondary intermediate and at least one derivative of 5,6-dihydroxyindoline corresponding to formula (I): ##STR1## in which--independently of one another--R.sup.1 is hydrogen, a C.sub.1-4 alkyl group or a C.sub.1-4 hydroxyalkyl group,R.sup.2 is hydrogen or a --COOH group which may even be present as a salt with a physiologically compatible cation,R.sup.3 is hydrogen or a C.sub.1-4 alkyl group,R.sup.4 is hydrogen, a C.sub.1-4 alkyl group or a group --CO--R.sup.6 where R.sup.6 is a C.sub.1-4 alkyl group andR.sup.5 is one of the groups mentioned for R.sup.4,or a physiologically compatible salt of these compounds with an organic or inorganic acid in an aqueous carrier and which are free from oxidation dye precursors of the primary intermediate type enable hair to be colored in particular in black tones with no tinges of red. In particular, completely or partly grey hair can be colored in tones which come very close to the color of the hair before greying.