Patent ID: 7374583

Claim:
An agent for the oxidative dyeing of fibers, comprising at least one oxidizing agent and at least one cationic azacyanine dye having the general formula (I); A standing for the 5-or 6-ring group required for the formation of an aromatic carbocyclic or heterocyclic (nitrogen, oxygen or sulfur, up to two additional heteroatoms possibly being contained in addition to the bridge nitrogen); R1′ being equal to an unbranched or branched (C1-C10) alkyl chain that can be selected from the group consisting of one or more alkoxy groups, hydroxyl groups, carboxylic acid amide groups, dialkylamino groups, alkylamino groups, carboxylic acid ester groups, carboxylic acid groups or sulfonic acid groups, an unsubstituted benzyl group, a benzyl group substituted with one or more alkyl groups, alkoxy groups, alkoxyalkyl groups, hydroxyl groups, hydroxyalkyl groups, carboxylic acid amide groups, dialkylamine groups, carboxylic acid ester groups, alkylcarboxylic acid ester groups, carboxylic acid groups, alkylcarboxylic acid groups, sulfonic acid groups or halogen atoms, or with a six-member or five-member aromatic carbocyclic or heterocyclic (nitrogen, oxygen or sulfur) ring that can be unsubstituted or substituted with one or more alkyl groups, alkoxy groups, alkoxyalkyl groups, hydroxyl groups, hydroxyalkyl groups, carboxylic acid amide groups, dialkylamine groups, carboxylic acid ester groups, alkylcarboxylic acid ester groups, carboxylic acid groups alkylcarboxylic acid groups, sulfonic acid groups and halogen atoms; R2′ is selected from the group consisting of hydrogen, an alkyl group, a hydroxyalkyl group, an alkoxyalkyl group, an alkoxy group, a halogen atom, or a six-member or five-member aromatic carbocyclic or heterocyclic (nitrogen, oxygen or sulfur) ring that can be unsubstituted or substituted with an alkyl group, an alkoxy group, an alkoxyalkyl group, a hydroxyl group, a hydroxyalkyl group, an alkylcarboxylic acid amide group, a dialkylamino group, a carboxylic acid ester group, an alkylcarboxylic acid ester group a carboxylic acid group, an alkylcarboxylic acid group, a sulfonic acid group, an alkylsulfonic acid group, an unsubstituted or substituted benzyl group and a halogen atom; and B is an aromatic molecule part with tertiary nitrogen.