Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Having -c- – wherein x is chalcogen – bonded directly to...
Patent
1997-04-09
1999-10-05
Krass, Frederick
Drug, bio-affecting and body treating compositions
Designated organic active ingredient containing
Having -c-, wherein x is chalcogen, bonded directly to...
548257, 548259, 548260, 548110, 424 59, 424 709, 424401, 528 15, 528 27, 528 31, A01N 2502, A61K 742
Patent
active
059624841
ABSTRACT:
Topically applicable sunscreen/cosmetic compositions well suited for enhanced photoprotection of human skin and/or hair against the damaging effects of UV-A and UV-B irradiation, particularly solar radiation, comprise a photoprotecting effective amount of a novel benzotriazole-substituted polyorganosiloxane/polyorganosilane having one of the formulae (1) to (3): ##STR1## wherein A is a monovalent benzotriazole radical bonded directly to a silicon atom and having the formula (4): ##STR2## the compounds of formulae (1) to (3) are prepared, e.g., via hydrosilylation, from novel intermedates, per se also exhibiting sunscreen activity, and having the formula (4a): ##STR3##
REFERENCES:
patent: 3936418 (1976-02-01), Pond et al.
patent: 5089250 (1992-02-01), Forestier et al.
patent: 5254542 (1993-10-01), Sakuta et al.
Chemical Abstracts 11539e, "2-(2-Hydroxy-3-Alkenyl-5-Methylphenyl)Benzotriazoles", Apr. 1963.
Lagrange Alain
Leduc Madeleine
Richard Herve
Krass Frederick
Societe l'Oreal S.A.
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