Patent ID: 7147841

Claim:
A solid lipid nanoparticle composition containing (a) 1 to 40% by weight of an oil-soluble UV absorber, (b) 20 to 98.9% by weight of a solid lipid having a diameter of from 10 nm to 10 μm, (c) 0.1 to 20% by weight of an emulsifier selected from alkali metal salts, ammonium salts and amine salts of fatty acids, saturated and unsaturated alkylsulfates, salts of bile acid, invert soaps (quats), partial fatty acid esters of sorbitan, sugar esters of fatty acids, alkyl glucosides, alkyl maltosides, betaines, proteins, fatty acid polyglycerol esters; fatty acid propylene glycol esters; fatty acid lactates and fatty alcohol phosphates and (d) 0 to 40% by weight of a liquid lipid or a liquid oil-miscible UV absorber, wherein the oil-soluble UV absorber (a) is dissolved or dispersed in the lipid.