Titanium dioxide hydrogel and sunscreen composition containi ng it

摘要

A TiO2 hydrogel and method of preparation therefor is disclosed: TiO2 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 TiO2 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.