Patent ID: 7407517
Filing Date: 2008-08-05
Classification: A61K,A61Q,C09B

Abstract:
1. A method for dyeing keratin fibers, comprising: applying to the keratin fibers a dyeing composition comprising at least one direct dye chosen from cationic azo compounds with a julolidine unit of formula (I): wherein: A is a cationic aromatic heterocycle chosen from compounds of formulae (IIa), (IIb), and (IIc): wherein: R R wherein two radicals R m is an integer ranging from 0 to 4; e is an integer ranging from 0 to 2; p is an integer ranging from 0 to 1; D is chosen from groups CR Q is chosen from groups NR bond a from formulae (IIa), (IIb) or (IIc), joins group A to the azo group; when two radicals R wherein the electroneutrality of the compounds is provided by at least one anion An X, Y and Z are optional substituents on the alkyl and aryl rings of the three-ring nucleus; x is an integer ranging from 0 to 2; y is an integer ranging from 0 to 6; and z is an integer ranging from 0 to 6; or their addition salts or their solvates, wherein, in the definitions above, when an alkyl radical or the alkyl part of a radical is substituted, said substituted alkyl comprises at least one substituent chosen from: wherein, in the definitions above, when an aryl or heteroaryl radical or the aryl or heteroaryl part of a radical is substituted, said substituted aryl or heteroaryl comprises at least one substituent carried by a carbon atom, wherein for the aromatic ring of the three ring nucleus of said julolidine unit said substituent is X, and wherein X or said at least one substituent is chosen from: wherein, in the definitions above, when the cyclic or heterocyclic part of a non-aromatic radical is substituted, it comprises at least one substituent carried by a carbon atom, wherein for the non-aromatic rings of the three ring nucleus of said julolidine unit said substituents are Y and Z, and wherein Y and Z or said at least one substituent is chosen from: wherein for all definitions above, when a ring does not carry the maximum number of substituents, the unsubstituted position or positions then carry a hydrogen atom.