Compositions for dyeing keratin fibers, comprising a cationic coupler, novel cationic couplers, their use for the oxidative dyeing and dyeing process

摘要

The invention concerns a composition for oxidation dyeing of keratin fibres, and in particular human keratin fibres such as hair, comprising at least an oxidation base and, as coupler, at least a 2-acylaminophenol of formula (I) comprising at least a cationic group Z of formula (II). The invention also concerns their use as couplers for dyeing keratin fibres, oxidation dyeing methods using them and novel cationic 2-acylaminophenols of formula (I').