Dyeing compositions for keratin fibres, based on 3-nitro-ortho-p

Details Dyeing compositions for keratin fibres, based on 3-nitro-ortho-p Dyeing compositions for keratin fibres, based on 3-nitro-ortho-p

1991-09-25

1993-02-16

Ore, Dale R.

Bleaching and dyeing; fluid treatment and chemical modification

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

Hair dyeing

8415, 8428, 8662, 8675, 132208, 424 47, A61K 713, A61K 7135, A61K 912

Patent

active

051867176

ABSTRACT:
The invention provides dyeing compositions for keratin fibres, which contain at least one dyestuff corresponding to the formula: ##STR1## in which R.sub.1 and R.sub.2 independently of one another denote a hydrogen atom, an alkyl group, a monohydroxyalkyl or polyhydroxyalkyl group, an alkyl group substituted by an alkoxy group, or an aminoalkyl group of which the amino group can optionally be monosubstituted or disubstituted by an alkyl group, and the radical R.sub.2 can also denote a phenyl group or a phenyl group substituted by an alkyl, hydroxyl or amino group, and Z denotes a hydrogen atom or an alkyl group, or their cosmetically acceptable salts. Many of the dyestuffs are novel.

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