Patent ID: 6793687
Filing Date: 2004-09-21
Classification: A61K,A61Q

Abstract:
An agent for oxidatively dyeing keratin fibers, said agent comprising a combination ofat least one 4,5-diaminopyrazole derivative of formula (I), (II), (III) or a salt thereof with an organic or inorganic acid: wherein R1 represents hydrogen, a linear or branched C2-C8 alkyl group, an optionally substituted phenyl group or a linear or branched C2-C4 hydroxyalkyl group;R2 represen hydrogen, a linear or branched C1-C8 alkyl group, an optionally substituted phenyl group or a linear or branched C2-C4 hydroxyalkyl group;R3 represents a halogen atom, a linear or branched C1-C4 alkyl group or a linear or branched C1-C4 alkoxy group and R4 represents hydrogen, a linear or branched C1-C4 alkyl group or a linear or branched C2-C4 hydroxyalkyl group;R5 represents hydrogen, a linear or branched C1-C8 alkyl group, a C1-C4 hydroxyalkyl group, a C1-C4 aminoalkyl group, a C1-C8 alkylamino group, a di(C1-C8)alkylamino group, a C1-C4 alkylamino-(C1-C4)alkyl group or a di(C1-C4)alkylamino-(C1-C4)alkyl group, an aryl group or a heteroaryl group;R6 and R7 may be the same or different and, independently of each other, each represents hydrogen, a linear or branched C1-C8 alkyl group, an aryl group, a heteroaryl group, a carboxylic acid group, a carboxylic acid ester group, an optionally substituted carboxylic acid amide group, a hydroxy group or a C1-C4 hydroxyalkyl group or R2 and R3 jointly form an optionally substituted C1-C8 alkylene group;Z is a C1-C10 alkyl diradical, which is optionally interrupted by a hetero atom, an aromatic diradical or a heteroaromatic diradical, which is optionally condensed with one or two benzene rings and/or substituted by a hydroxy group or a C1-C6 alkyl group, or a diradical of formulaâ€”Ar-(Alk)n-Arâ€”, in which Ar is an optionally substituted aryl or heteroaryl group, Alk is a â€”CH2 group and n is a whole number from 0 to 6; and x and y, independently of one another; are equal to 0 or 1; andat least one pyrazol-5-one derivative of formula (IV), (V) or (VI), or a salt thereof with an organic or inorganic acid; wherein R8 represents a linear or branched C1-C4 alkyl group, a linear or branched C1-C4 alkoxy group, a linear or branched C1-C4 alkoxy-(C1-C8)alkyl or a linear or branched C2-C4 hydroxyalkyl group; andR9 to R13, independently of each other, each represents hydrogen, a linear or branched C1-C4 alkyl group, a linear or branched C2-C4 hydroxyalkyl group, a hydroxy group, an amino group, a linear or branched C1-C4 alkoxy group; a linear or branche C1-C4 alkoxy-(C1-C4)alkyl or a linear or branched C1-C4-hydroxyalkylamino group.