Compositions containing sunscreens

Details Compositions containing sunscreens Compositions containing sunscreens

1996-10-03

1998-05-05

Ivy, C Warren

Drug, bio-affecting and body treating compositions

Topical sun or radiation screening, or tanning preparations

Aromatic acid or derivative containing

424 63, 424 69, A61K 744

Patent

active

057470120

ABSTRACT:
A process for preparing a composition suitable for topical application to human skin is disclosed. The process comprises mixing particles of metallic oxide dispersed in oil and having a primary particle size less than 0.2 micrometer with one or more emulsifiers, an aqueous phase and a hydrophilic organic sunscreen so as to prepare an emulsion. The composition contains up to 10 percent by weight metallic oxide and up to 7 percent by weight hydrophilic organic sunscreen. The emulsions are useful as sunscreen compositions, skin protectants, moisturisers, and after-sun lotions. The measured Sun Protection Factor for a composition of the invention is considerably higher than would be expected from a knowledge of the individual UV absorbing characteristics of the metallic oxide and the hydrophilic organic sunscreen.

REFERENCES:
patent: 4731242 (1988-03-01), Palinczar
patent: 4820508 (1989-04-01), Wortzman
patent: 4917883 (1990-04-01), Strobridge
patent: 4927464 (1990-05-01), Cowie
patent: 5028417 (1991-07-01), Bhat et al.
patent: 5032390 (1991-07-01), Iwaya
patent: 5041281 (1991-08-01), Strobridge
patent: 5093109 (1992-03-01), Mausner
patent: 5169624 (1992-12-01), Ziegler et al.
patent: 5208012 (1993-05-01), Sudo et al.
patent: 5215749 (1993-06-01), Nicoll
patent: 5250289 (1993-10-01), Boothroyd et al.

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