Patent ID: 7766977
Filing Date: 2010-08-03
Classification: A61K,A61Q

Abstract:
1. A composition for dyeing keratin fibers, comprising, in a suitable dyeing medium: at least one first oxidation base chosen from 2,3-diamino-6,7-dihydro-1H,5H-pyrazolo[1,2-a]pyrazol-1-one of formula (I) below, and the addition salts thereof: at least one second oxidation base chosen from para-phenylenediamines chosen from para-phenylenediamine, para-tolylenediamine, 2-isopropyl-para-phenylenediamine, 2-β-hydroxyethyl-para-phenylenediamine, 2-β-hydroxyethyloxy-para-phenylenediamine, 2,6-dimethyl-para-phenylenediamine, 2,6-diethyl-para-phenylenediamine, 2,3-dimethyl-para-phenylenediamine, N,N-bis(β-hydroxyethyl)-para-pheneylenediamine, and the addition salts thereof with an acid; at least one first coupler chosen from meta-aminophenols; at least one additional coupler chosen from meta-phenylenediamines, meta-diphenols, naphthalene-based couplers and heterocyclic couplers, and the addition salts thereof; and at least one oxidizing agent; wherein the pH of the composition ranges from 5.5 to 7.5; and further wherein the at least one first coupler and the at least one additional coupler are each present in an amount ranging from 0.001% to 10% by weight, relative to the total weight of the composition.