Bleaching and dyeing; fluid treatment and chemical modification – Dyeing involving animal-derived natural fiber material ,... – Hair dyeing
Patent
1995-09-22
1997-03-25
Einsmann, Margaret
Bleaching and dyeing; fluid treatment and chemical modification
Dyeing involving animal-derived natural fiber material ,...
Hair dyeing
8406, 8408, 8423, 8565, 8567, A61K 713
Patent
active
056139853
ABSTRACT:
The present invention relates to the use of a compound of the general formula I ##STR1## wherein R.sup.1 to R.sup.4, Hal and n are defined as in claim 1, as a coupler substance for the preparation of oxidation dyestuffs, and to hair colouring compositions which comprise a compound of the general formula I.
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Akram Mustafa
Bauer Wolfgang
Dusheck Caroline L.
Einsmann Margaret
Hoechst Aktiengesellschaft
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