Patent ID: 9028966
Filing Date: 2015-05-12
Classification: A61K,A61Q,C08J,C08L,Y10T

Abstract:
1. A method for producing silicone fine particles, each particle comprising a spherical fine silicone elastomer particle and polyorganosilsesquioxane particles attached to the surface of the spherical fine silicone elastomer particle, comprising the steps of: adding an organotrialkoxysilane to water for hydrolysis to obtain organotrialkoxysilane hydrolysate; and adding spherical fine silicone elastomer particles having a volume average particle size of 0.5 to 100 μm, an anionic surfactant, and an alkaline substance to the organotrialkoxysilane hydrolysate and allowing the mixture to stand to thereby promote condensation of the organotrialkoxysilane hydrolysate, so that the polyorganosilsesquioxane is deposited on the surface of the spherical fine silicone elastomer particles, the polyorganosilsesquioxane particles have a particle size in the range of 200 to 2,000 nm, and the particle size of the polyorganosilsesquioxane particles is smaller than that of the spherical fine silicone elastomer particle.