Patent ID: 9421156
Filing Date: 2016-08-23
CPC Classification: A61K,A61Q,C08G,C08K

Claim Text:
1. A method for preparing an aqueous dispersion comprising a nonionic surfactant, water, and a silicone elastomer particle having a crosslinking structure formed by an addition of a monovalent aliphatic unsaturated group bonded to a silicon atom and a hydrogen atom bonded to another silicon atom, wherein the silicone elastomer particle contains therein an antioxidant, the method comprising dissolving the antioxidant in a liquid silicone mixture comprising an organo(poly)siloxane having at least two monovalent aliphatic unsaturated groups each bonded to each one silicon atom and an organohydrogen(poly)siloxane having at least two hydrogen atoms each bonded to each one silicon atom, provided that the number of the monovalent aliphatic unsaturated groups each bonded to each one silicon atom in the organo(poly)siloxane is at least three and/or the number of the hydrogen atoms each bonded to each one silicon atom in the organohydrogen(poly)siloxane is at least three; subsequently adding water and the nonionic surfactant thereto, stirring and emulsifying them, and curing the mixture in the presence of a platinum group metal catalyst.