Sunscreen compositions containing porous metal oxide spheres
AssigneeBASF SE
InventorsBernd Herzog, Brigitte Lindemann, Christian Cremer, Rupa Hiremath Darji, Liangliang Qu, Keith Task
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Abstract
The present invention relates to a method for increasing sun protection factor (SPF) of a sunscreen composition, use of porous metal oxide spheres (e.g., microspheres) for increasing SPF of a sunscreen composition and preparation of sunscreen compositions comprising the porous spheres.
Claims15
A method for increasing the sun protection factor of a sunscreen composition, the method comprising adding porous spheres comprising a metal oxide to the sunscreen composition, wherein the metal oxide is at least one selected from the group consisting of silica, titania, alumina, zirconia, ceria, iron oxides, zinc oxide, indium oxide, tin oxide and chromium oxide:
- wherein the porous spheres have a uniform pore diameter with an average pore diameter in the range of 50 nm to 999 nm;
- wherein the porous spheres have an average diameter in the range of 0.5 μm to 100.0 μm;
- and
- wherein the method further minimizes or masks the whitening effect of the sunscreen composition and maintains its transparency.
Dependencies are inferred from the claim text.