Fine powder produced by the production process and method of the epoxy group-containing silicone elastomer fine powder

摘要

PURPOSE:To obtain the title powder which can improve the properties of an organic resin of a different kind by adding an inorganic salt to a specified silicone elastomer emulsion, coagulating and separating the cured dispersed particles in the emulsion, separating the particles by filtration and drying them. CONSTITUTION:A curable organopolysiloxane composition (A) is obtained by mixing an organopolysiloxane having at least two Si-bonded vinyl groups and at least one Si-bonded epoxy-containing organic group in the molecule with a organohydrogenpolysiloxane having at least one Si-bonded H in the molecule and platinum catalyst. Component A is dispersed in water (B) to form an aqueous emulsion, and the component A dispersed in the form of particles is cured to obtain a silicone elastomer emulsion of a volume-mean particle diameter =20mum. An inorganic salt (C) is added to this emulsion, and the cured dispersed particles are coagulated, separated, filtered, washed and dried to obtain the title fine powder.