| abstract |
Trialkoxy-substituted meta-phenylenediamines, a process for their preparation, and their use as couplers for oxidation dying of keratinous fibres and in particulate of human hair. n 1,3,5-trialkoxy-meta-phenylenediamine of formula: ##STR1## in which: R 1 and R 2 denote, independently of each other, a hydrogen atom, an alkyl radical containing 1 to 4 carbon atoms or a mono- or polyhydroxyalkyl radical containing 2 or 3 carbon atoms, n Z denotes an alkyl radical containing from 1 to 4 carbon atoms, provided that, when R 1 and R 2 simultaneously denote a hydrogen atom, Z does not denote the methyl radical, and the addition salts of this compound with an acid. n Process for the preparation of these compounds and their use as coupler in oxidation dying compositions for hair. |