Use in dyeing keratin fibers, in particular for human hair, of a 3-substituted para-aminophenol, dye composition for keratin fibers, oxidation dyeing process of keratin fibers, and 3-substituted para-aminophenol

摘要

Invention Patent "USE IN THE DYEING OF KERATIN FIBERS, IN PARTICULAR FOR HUMAN HAIRS, OF A 3-SUBSTITUTED PARA-AMINOPHENOL, COLORING COMPOSITION FOR KERATIN FIBERS, PROCESSING OF DYEING IN KERINATINE FINE-SUBSTITUTES, AND SUBSTANEOUS FINE," D. The invention relates to the use of a 3-substituted para-aminophenol as an oxidation dye precursor to dye keratinous fibers, in particular human hair. The 3-substituted para-aminophenol has the formula: where R ~ 1 ~ represents alkyl, alkenyl, mono- or polyhydroxyalkyl, nitrile, cyanoalkyl, halogenoalkyl, aminoalkyl or alkoxyalkyl and R ~ 2 ~ represents hydrogen, alkyl or mono- or polyhydroxyalkyl, provided that when R ~ 2 ~ is hydrogen R ~ 1 ~ is not methyl or trifluoromethyl, and to addition salts thereof with an acid. The invention also relates to dye compositions containing compound (I). The invention also relates to the new 3-substituted para-aminophenols.