Storage stable 2-methyl-1-naphthol couplers

Bleaching and dyeing; fluid treatment and chemical modification – Dyeing involving animal-derived natural fiber material ,... – Hair dyeing

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8406, 8424, A61K 713

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active

06045590&

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, --OC.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:
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patent: 2162458 (1939-06-01), Lehmann
patent: 3770442 (1973-11-01), Meyer et al.
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patent: 4508810 (1985-04-01), Wartman
patent: 5344463 (1994-09-01), Chan et al.
English Language translation of JP 62-35262, Konishiroku Photo, pp. 1-25, Feb. 1987.
Chemistry The Central Science, 4th Edition, Prentice Hall, Brown et al., p. 67, 1988 (no month available).
Grant & Hackh's Chemical Dictionary, Fitth Edition, McGraw Hill Book Company, pp. 22-23, 1987 (no month available).

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