Patent ID: 9267037
Filing Date: 2016-02-23
CPC Classification: A61K,A61Q,C08G,C08J,C08L

Claim Text:
1. Silicone composite particles comprising: 100 parts by weight of spherical particles of a silicone elastomer having a volume average particle size of 0.1 to 100 m, coated on their surfaces with 0.5 to 25 parts by weight of a silicone resin based on organosilsesquioxane units, said silicone resin containing 0.1 to 25 parts by weight of inorganic nano-particles having a volume average particle size of up to 100 nm, wherein said inorganic nano-particles are selected from the group consisting of titanium oxide, iron oxide, and zinc oxide, wherein the inorganic nano-particles are dispersed in the silicone, and said silicone composite particles are prepared by adding an acidic or basic substance and a compound selected from the group consisting of alkoxysilanes, silanol-containing silanes and partial condensates thereof to a mixed water dispersion of silicone elastomer spherical particles and inorganic nano-particles, and subjecting the compound to hydrolytic condensation reaction, thereby coating surfaces of the silicone elastomer spherical particles with a silicone resin having the inorganic nano-particles laden therein while taking inorganic nanoparticles therein.