Sunscreen composition

Details Sunscreen composition Sunscreen composition

1995-05-24

1997-12-23

Dodson, Shelley A.

Drug, bio-affecting and body treating compositions

Topical sun or radiation screening, or tanning preparations

423610, 428402, 514772, A61K 742, C01G 23047

Patent

active

057004510

ABSTRACT:
A TiO.sub.2 hydrogel and method of preparation therefor is disclosed: TiO.sub.2 particles ranging in size from at least about 50 nm to about 150 nm wherein the particle is about 20% to about 90% anatase are disclosed. Topical sunscreen compositions, which comprise 1% to about 15% anatase/amorphous TiO.sub.2 are also disclosed. This composition provides UVA and UVB protection without concomitant dulling or discoloring the skin. The composition also has enhanced stability, is invisible, is easy to apply in an even manner and resists discoloration (or "color-changing") or decomposition on the shelf or on the skin.

REFERENCES:
patent: 4820508 (1989-04-01), Wortzman
patent: 5024827 (1991-06-01), Jones et al.
Brown et al., "Testing UVA and UVB Protection From Microfine Titanium Dioxide", Cosmetics & Toiletries, vol. 105, pp. 69-73, 1990.
Robb, et al., "Scattering & Absorption of UV Radiation by Sunscreens Containing Fine Particle & Pigmentary Titanium Dioxide", DCI, pp. 32-39, Mar., 1994.
Derwent: GB2276157-A, Sep. 21, 1994, Abstract.
Patent Abstracts of Japan, vol. 012. No. 398 (C-538), JP,A,63 141912, Abstract. Jun. 14, 1988.
Patent Abstracts of Japan, vol. 013. No. 011 (C-558), JP,A,63 218615, Abstract. Sep. 12, 1988.

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