SILICONE MICROPARTICLE COMPRISING SILICONE ELASTOMER SPHERICAL MICROPARTICLE COATED WITH POLYORGANOSILSESQUIOXANE, AND METHOD OF PRODUCING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a silicone microparticles absorbing a large amount of polymethylsilixane to be a low viscosity silicone having≤10 mm2/s viscosity and suppressing greasiness, stickiness and oily film feeling of cosmetic materials to which the polymethylsiloxane is added and to provide a method of producing the same.

SOLUTION: The silicone microparticles includes 100 parts by mass of silicone elastomer spherical microparticles having a volume-average particle diameter within a range from 0.1 to 100μm, and 0.5 to 25 parts by mass of a polyorganosilsesquioxane that coats the surface of the silicone elastomer spherical microparticles and the silicone elastomer absorbs not less than 200 parts by mass of a polymethylsiloxane having viscosity at 25°C of not more than 10 mm2/s per 100 parts by mass of the silicone elastomer. The silicone microparticles can be produced by hydrolyzing and condensing an organotrialkoxysilane in an aqueous medium, in the presence of the silicone elastomer spherical microparticles and an alkaline material, thereby coating the surface of the silicone elastomer spherical microparticles with a polyorganosilsesquioxane.

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