Storage stable 2-methyl-1-naphthol couplers

Details Storage stable 2-methyl-1-naphthol couplers Storage stable 2-methyl-1-naphthol couplers

1996-04-15

1997-09-30

Lieberman, Paul

Bleaching and dyeing; fluid treatment and chemical modification

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

Hair dyeing

8406, 8424, A61K 713

Patent

active

056721803

ABSTRACT:
Compounds of Formula II ##STR1## wherein R.sub.3 is --COOCH.sub.3, --COCH.sub.3 or --COCH.sub.2 CH.sub.3 and R.sub.4 is hydrogen or R.sub.3 is hydrogen and R.sub.4 is --OCH.sub.3, --OCH.sub.2 CH.sub.3, --OCH.sub.2 CH.sub.2 OH or --OCH.sub.2 CH.sub.2 OCH.sub.3 are storage stable and can be used in oxidative hairdye systems in place of the storage unstable 2-methyl-1-naphthol. Advantageously, it has been found to produce the same colors as 2-methyl-1-naphthol.

REFERENCES:
patent: 2001992 (1935-05-01), Wagner et al.
patent: 2162458 (1939-06-01), Lehmann
patent: 3770442 (1973-11-01), Meyer et al.
patent: 4508810 (1985-04-01), Wartman
patent: 5344463 (1994-09-01), Chan et al.
English language translation of JP 62-35262, Konishiroku Shashin Kogyo, pp. 1-25 Feb. 1987.

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