Compositions and methods for the dyeing of keratinous fibers wit

Details Compositions and methods for the dyeing of keratinous fibers wit Compositions and methods for the dyeing of keratinous fibers wit

1994-08-15

1996-05-21

Lieberman, Paul

Bleaching and dyeing; fluid treatment and chemical modification

Dyeing involving animal-derived natural fiber material ,...

Hair dyeing

8406, 8407, 8408, 8410, 8423, A61K 713

Patent

active

055185053

ABSTRACT:
Compositions for the oxidative dyeing of keratinous fibers comprising an indole derivative corresponding to the formula (I): ##STR1## in which: R.sub.1 denotes a hydrogen atom or a C.sub.1 -C.sub.4 alkyl group, R.sub.2 and R.sub.3 denote a hydrogen atom or a C.sub.1 -C.sub.4 alkyl group or a carboxyl or C.sub.1 -C.sub.4 alkoxycarbonyl group, R.sub.4 and R.sub.5, which are identical or different, denote a C.sub.1 -C.sub.4 alkyl group, a C.sub.2 -C.sub.20 acyl group, an aryl group, or else R.sub.4 and R.sub.5, together with the oxygen atoms and the two carbon atoms to which they are attached, form a ring optionally containing a carbonyl group or a methylene group unsubstituted or substituted by one or two alkyl or alkoxy or alkylamino groups, it being possible for R.sub.4 and R.sub.5 simultaneously to denote hydrogen, and the addition salts of inorganic or organic acids, as well as the corresponding alkali, alkaline-earth metal or amine salts, as a coupler, para and/or ortho oxidation dye precursors, and an oxidizing agent.

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