Cosmetic preparations comprising photostable UV-A filters

Details Cosmetic preparations comprising photostable UV-A filters Cosmetic preparations comprising photostable UV-A filters

1997-08-22

1999-10-19

Dodson, Shelley A.

Drug, bio-affecting and body treating compositions

Topical sun or radiation screening, or tanning preparations

424 60, 424400, 424401, 558303, A61K 742, A61K 700, C07C25503

Patent

active

059684844

ABSTRACT:
A cosmetic preparation which comprises a sunscreen agent for protecting the human epidermis against UV light in the range from 280 to 400 nm, which comprises, in a cosmetically suitable carrier, alone or together with compounds which absorb in the UV region and are known for cosmetic preparations, as photostable UV-A filters, effective amounts of compounds of the formula I ##STR1## where R.sup.1, R.sup.2 and R.sup.3 are hydrogen or aliphatic or cycloaliphatic radicals each having up to 18 carbon atoms, it being possible for any two of the radicals R.sup.1, R.sup.2 and R.sup.3 together to form a 5- or 6-membered ring, and R.sup.4 and R.sup.5 are an unsubstituted or substituted aromatic or heteroaromatic radical having 5 to 12 ring atoms, and R.sup.5 can additionally be hydrogen.

REFERENCES:
patent: 3280069 (1966-10-01), Knapp et al.
patent: 3694211 (1972-09-01), Sato et al.
patent: 4387089 (1983-06-01), De Polo

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