5,8-dihydroxy naphthalene-1,4-dione derivative and a hair dye co

Details 5,8-dihydroxy naphthalene-1,4-dione derivative and a hair dye co 5,8-dihydroxy naphthalene-1,4-dione derivative and a hair dye co

1985-04-19

1986-08-12

Clingman, A. Lionel

Bleaching and dyeing; fluid treatment and chemical modification

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

Hair dyeing

8405, 8406, 8421, 8650, 8651, 8653, 564428, A61K 713, C07C 8764

Patent

active

046054197

ABSTRACT:
A naphthalene derivative having the general formula: ##STR1## wherein R represents hydrogen, an alkyl group having 1 to 8 carbon atoms, an R.sup.1 O (CH.sub.2).sub.n group, or a benzyl group, R.sup.1 represents hydrogen or a lower alkyl group, and n represents an integer of 2 or 3.
This compound in the leuco state can be stably isolated and can produce a strong and fast color upon oxidation under moderate conditions. This compound can be advantageously included in a hair dye composition, which is capable of stably and safely dyeing hair with a good and stable color under moderate conditions.

REFERENCES:
patent: 2508203 (1950-05-01), Weber
patent: 3041244 (1962-06-01), Feit et al.
patent: 3251744 (1966-05-01), Brunner
patent: 3516778 (1970-06-01), Brunner

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