Patent ID: 7244278

Claim:
A ready-to-use agent for coloring keratin fibers, wherein said ready-to-use agent contains: (a) at least one hydrazone derivative of formula (I), or a physiologically compatible salt thereof: wherein X denotes oxygen, sulfur or N—R2, Y denotes C—R3 or nitrogen, and Z denotes C—R4 or nitrogen, provided that a heterocyclic ring in said at least one hydrazone derivative contains at the most three hetero atoms; A denotes hydrogen, an acetyl group, a trifluoroacetyl group, a formyl group, a (C 1 -C 6 )-alkyl-sulfonyl group, or an arylsulfonyl group; R1 and R2 are the same or different and, independently of each other, denote a saturated or unsaturated (C 1 -C 12 )-alkyl group, a halogen-substituted (C 1 -C 12 )-alkyl group, a hydroxy-(C 1 -C 12 )-alkyl group, an amino-(C 1 -C 12 )-alkyl group, a sulfonic acid-(C 1 -C 12 )-alkyl group, a formyl group, a —C(O)—(C 1 -C 12 )-alkyl group, a —C(O)-phenyl group, a —C(O)NH—(C 1 -C 12 )-alkyl group, a —C(O)NH-phenyl group, a phenyl group, or a benzyl group; R3 and R4 can be the same or different and, independently of each other, denote hydrogen, a halogen atom, a saturated or unsaturated (C 1 -C 12 )-alkyl group, a halogen-substituted (C 1 -C 12 )-alkyl group, a hydroxy-(C 1 -C 12 )-alkyl group, a (C 1 -C 12 )-alkoxy group, a cyano group, a nitro group, an amino group, a (C 1 -C 12 )-alkylamino group, a di(C 1 -C 12 )-alkylamino group, a carboxyl group, a —C(O)O—(C 1 -C 12 )-alkyl group, a —C(O)O-phenyl group, a phenyl group, or a naphthyl group; and when Y and Z denote C—R3 and C—R4, R3 and R4 together with a remainder of the hydrazone derivative can form a heterocyclic, carbocyclic, saturated or unsaturated ring system; (b) at least one aromatic enamine of formula (IIa), or an acid addition salt thereof of formula (IIb): wherein R5 denotes a mononuclear or polynuclear aromatic group, R6 denotes a (C 1 -C 12 )-alkyl group, a monohydroxy-(C 1 -C 12 )-alkyl group, or a mono-(C 1 -C 6 )-alkoxy-(C 1 -C 6 )-alkyl group, wherein oxygen atoms can be present between carbon atoms of the alkyl group, and R7 denotes a (C 1 -C 12 )-alkyl group, a mono-(C 1 -C 6 )-alkoxy-(C 1 -C 6 )-alkyl group, a (C 1 -C 6 )-alkylene-(C 1 -C 6 ) group, a (C 1 -C 6 )-alkoxy-(C 1 -C 6 )-alkylene group, —O—, NR8- or —S—; wherein R8 denotes a (C 1 -C 12 )-alkyl group, a mono-(C 1 -C 6 )-alkoxy-(C 1 -C 6 )-alkyl group, a monohydroxy-(C 1 -C 12 )-alkyl group, or hydrogen, and wherein R5 and R7 together with a nitrogen atom and a carbon atom of the aromatic enamine or the acid addition salt thereof form a cyclic linkage, and B − denotes an anion of an organic or inorganic acid; and (c) at least one oxidant.