P-phenylenediamines, process for preparation thereof, dyeing com

Details P-phenylenediamines, process for preparation thereof, dyeing com P-phenylenediamines, process for preparation thereof, dyeing com

1990-09-13

1991-07-16

Lieberman, Paul

Bleaching and dyeing; fluid treatment and chemical modification

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

Hair dyeing

8405, 8416, 8428, 8429, 564440, A61K 713

Patent

active

050321374

ABSTRACT:
The invention relates to p-phenylenediamines of formula: ##STR1## in which R.sub.1 denotes an alkyl, hydroxyalkyl or polyhydroxyalkyl radical and R.sub.2 denotes a hydrogen atom or an alkyl radical, as well as the corresponding salts with acids, and to the compositions and the process for dyeing keratinous fibres, and especially hair, employing them.

REFERENCES:
patent: 4979961 (1990-12-01), Junino et al.

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