Patent ID: 7534273
Filing Date: 2009-05-19
Classification: A61K,A61Q,C09B

Abstract:
1. An agent for coloring keratin fibers comprising from 0.01 to 10% by weight of a cationic pyrazolone dye of the general formula (I), in which n is 0 or 1; R R R R R L is a C B a) an aromatic, heterocyclic quaternary ammonium compound, preferably a quaternary compound of N-methylimidazole, a quaternary compound of N-allylimidazole, a quaternary compound of 2-ethylimidazole, a quaternary compound of 1,2-dimethylimidazole, a quaternary compound of pyridine, a quaternary compound of 4-dimethylaminopyridine, a quaternary compound of pyrimidine, a quaternary compound of pyrazole, a quaternary compound of N-methylpyrazole or a quaternary compound of quinoline; or b) a nonaromatic heterocyclic quaternary ammonium compound, in particular a quaternary compound of N-methylmorpholine, a quaternary compound of N-ethylmorpholine or a quaternary compound of 1-methylpiperidine; or c) a quaternary alkylammonium compound or arylammonium compound of the formula NR d) a quaternary phosphonium group, for example a tributylphosphonium group, but in particular a trimethylammonium group or a triethylammonium group; and X with the proviso that at least one of the radicals R 1 and R 2 is a cationic group.