Compositions for dyeing keratin fibres containing s-oxide-thiazolo-azoles and/or s,s-dioxide-thiazolo-azoles; their use for dyeing as couplers, method of dyeing

摘要

A compostion for the dyeing of keratinous fibres comprising, in a medium appropriate for dyeing keratinous fiber contains:as coupler, at least one compound of formula:in whichR1 denotes in particular hydrogen, halogen, aryloxy, alkoxy, acyloxy, arylthio, alkylthio, acetamido; an NRIIIRIV radical with RIII and RIV representing a C1-C4 alkyl, and the like;Za, Zb, and Zc represent, independently of one another, a nitrogen atom or else a carbon atom carrying an R2, R3 or R4 radical; provided that:when Za denotes a carbon atom carrying an R2 radical, Zb represents a nitrogen atom and Zc denotes a carbon atom carrying an R3 radical;when Za denotes a nitrogen atom, Zb represents a carbon atom carrying an R4 radical and Zc dentoes a nitrogen atom;R2, R3 or R4=H, C1-4 alkyl, aryl; n is 1 or 2: and at least one oxidation base.