Zinc oxide dispersions

Details Zinc oxide dispersions Zinc oxide dispersions

1997-08-06

1999-06-22

Dodson, Shelley A.

Drug, bio-affecting and body treating compositions

Topical sun or radiation screening, or tanning preparations

106425, 106426, 106428, 106436, 2523131, 423 99, 424 60, 424400, 424401, A61K 742, A61K 700

Patent

active

059141018

ABSTRACT:
A stabilised aqueous dispersion of particulate zinc oxide comprises water, a stabilising agent and zinc oxide, the particles of which are coated with dense amorphous silica. Useful stabilising agents include cellulose ethers which contain quaternary ammonium groups and polyalkylene glycols. The dispersions have excellent stability at high concentrations of zinc oxide and are useful for preparing sunscreen formulations, cosmetics and veterinary products.

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Database WPI, Section Ch, Week 9522, Derwent Publications Ltd., London, GB; Class A60, AN 95-167072, XP002048129 & JP 07 089 710 A (Nippon Color Kogyo KK), Apr. 4, 21995.

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