Compositions for dyeing keratin fibers containing para-aminophenols, dyeing process, novel para-aminophenols and process for their preparation

摘要

Compositions for the oxidation dyeing of keratin fibers, comprising, as oxidation base, at least one para-aminophenol, of formula (I) and/or at least one acid-addition salt thereof: ;in which:;R₁ represents a hydrogen atom, a linear or branched C₁-C₄ alkyl radical or a C₁-C₄ trifluoroalkyl radical,;R₂ and R₃ independently represent a hydrogen atom, a C₁-C₄ alkyl radical or a C₁-C₄ monohydroxyalkyl radical, and;X, Y and Z independently represent a carbon, nitrogen, oxygen or sulphur atom, wherein the bonds XY and YZ are single or double bonds;;a dyeing process using these compositions, novel para-aminophenols and a process for their preparation.