Patent ID: 7481847
Filing Date: 2009-01-27
Classification: A61K,A61Q

Abstract:
1. A dye composition comprising, in a medium suitable for dyeing human keratin fibers: (a) at least one direct dye chosen from cationic direct hydrazone dyes of formula (I) and tautomeric forms thereof: wherein: R A is a fused or non-fused, optionally substituted cationic heterocycle chosen from pyrimidinone, indole, and benzothiazole rings; the ring A being linked to the carbon of C(R B is a saturated or unsaturated, optionally substituted tricycle chosen from dibenzofurans, carbazoles, anthraquinones, and dibenzothienyls; the saturated or unsaturated tricycle B being linked to the nitrogen atom of the hydrazone function via a carbon atom of one of the three rings; X is chosen from anions and mixtures of anions that are cosmetically acceptable; (b) at least one cosmetic agent chosen from thickening polymers and surfactants.