Substituted diaminophenols, and hair dyes containing such compou

Details Substituted diaminophenols, and hair dyes containing such compou Substituted diaminophenols, and hair dyes containing such compou

1995-10-25

1997-10-14

Lieberman, Paul

Bleaching and dyeing; fluid treatment and chemical modification

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

Hair dyeing

8406, 8408, 8581, 8624, 564305, 564443, A61K 713, C07C21151

Patent

active

056767064

ABSTRACT:
Compounds of the formula (I) and their salts with inorganic and organic acids, ##STR1## in which R.sub.1 is a hydrogen atom or a trimethylsilyl group, R.sub.2, R.sub.3, R.sub.4, and R.sub.5 are, independently of each other, a hydrogen atom, a (C.sub.1 -C.sub.4) alkyl group, a hydroxy-(C.sub.2 -C.sub.3) alkyl group, an alkoxy-(C.sub.2 -C.sub.3) group, an amino-(C.sub.2 -C.sub.3) group, or a 2,3-dihydroxypropyl group, and in which R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are not simultaneously hydrogen atoms, and processes for their preparation and use as hair-coloring agents.

REFERENCES:
patent: 3184387 (1965-05-01), Seemuller
patent: 3666812 (1972-05-01), Kalopissis et al.
patent: 3738799 (1973-06-01), Kalopissis et al.
patent: 4566875 (1986-01-01), Grollier et al.
patent: 4985955 (1991-01-01), Grollier et al.
patent: 5180397 (1993-01-01), Grollier et al.
patent: 5525123 (1996-06-01), Lorenz et al.

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