Sunscreen composition
AssigneeThe Procter & Gamble Company
InventorsJiang Yue, Lisa Renee Dew, Donald Lynn Bissett
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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.
Claims12
A topical composition comprising:
- a) as an active from about 1% to about 15% anatase crystal in amorphous TiO.sub.2 chosen from the group consisting of;
- 1) a hydrogel comprising about 20% to about 60% solids comprising about 20% to about 90% anatase crystal in amorphous TiO.sub.2 having average crystalline domain dimensions of about 3 nm to about 10 nm;
- and
- 2) a TiO.sub.2 particle comprising about 20% to about 90% anatase form wherein the particles are from about 50 nm to about 150 nm in size;
- and
- b) a cosmetically acceptable topical carrier.
Dependencies are inferred from the claim text.