Drug – bio-affecting and body treating compositions – Topical sun or radiation screening – or tanning preparations
Patent
1996-12-31
1998-05-12
Mosley, Terressa
Drug, bio-affecting and body treating compositions
Topical sun or radiation screening, or tanning preparations
A61K 742
Patent
active
057500908
ABSTRACT:
Proposed is a powder of silica-cerium oxide composite particles useful as an ultraviolet shielding agent in a resin composition or as a sunscreening agent in a cosmetic composition. The cerium oxide-based composite particles consist of cerium oxide and 5 to 60% by weight of amorphous silica calculated as SiO.sub.2. The composite particles are prepared by the addition of sodium silicate and an inorganic acid to an aqueous slurry containing precipitates of cerium hydroxide so as to precipitate amorphous silica on the particles of cerium hydroxide followed by drying and calcination of the particles separated from the reaction mixture. Various formulations of cosmetic compositions compounded with the silica-cerium oxide composite particles are disclosed.
REFERENCES:
patent: 5478550 (1995-12-01), Suzuki et al.
Hirai Kiminori
Momose Shigeyoshi
Shinnumadate Satomi
Yabe Shinryo
Yoshida Sakae
Kose Corporation
Mosley Terressa
Nippon Inorganic Colour & Chemical Co., Ltd.
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