Patent ID: 6551360
Filing Date: 2003-04-22
Classification: A61K,A61Q

Abstract:
A composition for dyeing keratin fibers comprising:(a) at least one coupler chosen from at least one pyrazoline-3,5-dione compound of formula (I) and acid addition salts thereof: wherein:R2 is chosen from a hydrogen atom; a halogen atom; an acetylamido radical; an alkoxy radical; an acyloxy radical; an aryloxy radical; an arylthio radical; an alkylthio radical; a heteroarylthio radical; a heteroaryloxy radical; a thiocyano radical; an N,N-diethylthiocarbonylthio radical; a dodecyloxythiocarbonylthio radical; a benzenesulphonamido radical; an N-ethyltoluenesulphonamido radical; a pentafluorobutanamido radical; a 2,3,4,5,6-pentafluorobenzamido radical; a p-cyanophenylureido radical, an N,N-diethylsulphamoylamino radical; a pyrazolyl radical; an imidazolyl radical; a triazolyl radical; a tetrazolyl radical; a benzimidazolyl radical; a 1-benzyl-5-ethoxy-3-hydantoinyl radical; a 1-benzyl-3-hydantoinyl radical; 5,5-dimethyl-2,4-dioxo-3-oxazolidinyl; a 2-oxy-1,2-dihydro-1-pyridyl radical; an alkylamido radical; an arylamido radical; a radical NRIIIRIV, wherein RIII and RIV, which may be identical or different, are each chosen from a C1-C4 alkyl radical, a hydroxyalkyl radical; a carboxyl radical; and an alkoxycarboxyl radical; wherein all of said radicals are substituted or unsubstituted; R1 and R3, which may be identical or different, are each chosen from a hydrogen atom; a C1-C5 alkyl radical; a C2-C4 mono- or polyhydroxyalkyl radical; a C2-C4 aminoalkyl radical; a phenyl radical; a phenyl radical substituted with a halogen atom or a C1-C4 alkyl radical, a C1-C4 alkoxy radical, a nitro radical, a trifluoromethyl radical, an amino radical, or a C1-C4 alkylamino radical; a benzyl radical; a benzyl radical substituted with a halogen atom, a C1-C4 alkyl radical, a C1-C4 alkoxy radical, a methylenedioxy radical, or amino radical; and a radical wherein m and n, which may be identical or different, are each chosen from integers ranging from 1 to 3, X is chosen from an oxygen atom and an NH group, Y is chosen from a hydrogen atom and a methyl radical, and Z is chosen from a methyl radical; a group OR or NRRâ€², wherein R and Râ€², which may be identical or different, are each chosen from a hydrogen atom, a methyl radical and an ethyl radical; an amino radical; a C1-C4 alkylamino radical; a carboxyl radical; an alkoxycarbonyl radical; an aryloxycarbonyl radical; a 5- or 6-membered heterocycle with at least one nitrogen, sulphur or oxygen atom; an acyl radical; a sulphonyl group; and a phosphonyl group; wherein when R2 and R3 simultaneously represent a hydrogen atom, then R1 is other than a hydrogen atom, a C1-C5 alkyl radical or a phenyl radical; and (b) at least one oxidation base chosen from para-phenylenediamines bis(phenyl)alkylenediamines para-aminophenols, ortho-aminophenols, heterocyclic bases, and acid addition salts thereof, wherein said para-phenylenediamines are chosen from compounds of formula (II): wherein:R5 is chosen from a hydrogen atom, a C1-C4 alkyl radical, a C1-C4 monohydroxyalkyl radical, a C2-C4 polyhydroxyalkyl radical and a (C1-C4 )alkoxy(C1-C4 )alkyl radical, R6 is chosen from a hydrogen atom, a C1-C4 alkyl radical, a C1-C4 monohydroxyalkyl radical and a C2-C4 polyhydroxyalkyl radical, R7 is chosen from a hydrogen atom, a halogen atom, a C1-C4 alkyl radical, a sulpha radical, a carboxyl radical, a C1-C4 monohydroxyalkyl radical and a C1-C4 hydroxyalkoxy radical, and R8 is chosen from a hydrogen atom and a C1-C4 alkyl radical, wherein when one of R5 and R6 is ethyl, the other one of R5 and R6 is not hydroxyethyl, and further wherein said at least one coupler and said at least one oxidation base are present in said composition in an amount effective for dyeing keratin fibers, and (c) a medium suitable for dyeing keratin fibers.