| 摘要 |
The invention concerns a composition for dyeing keratin fibres, in particular human hair, containing in an appropriate medium for dyeing: as coupler at least one compound of formula: (I) in which: R1 represents in particular hydrogen, halogen; alcoxy, aryloxy; acyloxy; arylthio; alkylthio; a NR<III>R<IV> radical with R<III> and R<IV> representing, identical or different, one C1-C4 alkyl .....; Za and Zb, different from each other, represent one oxygen or nitrogen atom; R2 and R3 represent hydrogen; alkyl, aryl; one heterocyclic compound with 5 or 6 chain links having at least one nitrogen, oxygen or sulphur atom; when R<2> and/or R3 represent one alkyl radical, one aryl radical or one hetrocyclic compound with 5 or 6 chain links, it can be linked with the carbon atom of the nucleus via one oxygen, nitrogen or sulphur atom; R2and R3 can also represent a halogen atom; acyl; sulphonyl; sulphinyl; .....and at least one oxidation base. The invention also concerns the dyeing method using such a composition. |
