Derivatives of 2,5-dihydroxyphenylcarboxylic acids, and their ut

Details Derivatives of 2,5-dihydroxyphenylcarboxylic acids, and their ut Derivatives of 2,5-dihydroxyphenylcarboxylic acids, and their ut

1996-07-19

1997-09-16

Venkat, Jyothsan

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Cosmetic, antiperspirant, dentifrice

424 62, 424450, 424489, 564170, 5142375, 514257, 514317, 514423, 514622, 514846, 514937, 514938, 514943, 514944, A61K 742

Patent

active

056677928

ABSTRACT:
A cosmetic or dermatological composition with a depigmenting action comprises derivatives of 2,5-dihydroxyphenylcarboxylic acids, their homologs, and their salts, with the derivatives having the following structural formula: ##STR1## wherein: R.sub.1 represents OR.sub.5, OH, or ##STR2## R.sub.5 is a linear or branched C.sub.1 -C.sub.20 alkyl radical, a linear or branched C.sub.2 -C.sub.20 alkenyl radical, or a C.sub.1 -C.sub.20 alkyl radical substituted by one or more hydroxy or alkoxy groups;

REFERENCES:
patent: 4185958 (1980-01-01), Bugaut et al.
patent: 4289495 (1981-09-01), Bugaut et al.
patent: 4484000 (1984-11-01), Howell
patent: 4526779 (1985-07-01), Hashimoto
patent: 4545984 (1985-10-01), Moller et al.
patent: 4835323 (1989-05-01), Howell
patent: 5587173 (1996-12-01), Junino et al.

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