Patent ID: 7294151
Filing Date: 2007-11-13
Classification: A61K,A61Q

Abstract:
1. A fiber-coloring agent (A), containing a) at least one hydrazone derivative of formula (I), or a physiologically compatible salt thereof: in which X denotes oxygen, sulfur, or N—R4; Y denotes C—R5 or nitrogen, and Z denotes C—R6 or nitrogen; provided that a heterocyclic part of the derivative of the formula (I) contains at the most three heteroatoms; in which R1 and R4 are equal or different and, independently of each other, each denote a saturated or unsaturated (C R2 and R3 are equal or different and, independently of each other, each denote a saturated or unsaturated (C R5 and R6 are equal or different and, independently of each other, each denote hydrogen, a halogen atom, a saturated or unsaturated (C and with the proviso that, if Y and Z denote said C—R3 and said C—R4, then R5 and R6 together with a remainder of the formula (I) form a heterocyclic or carbocyclic, saturated or unsaturated, substituted or unsubstituted ring system; (b) at least one coupler, or a physiologically compatible salt thereof; and (c) a persulfate salt as oxidant.