Particles with a silica core and a silicone shell, those containing dispersed emulsion and a method for the preparation of these emulsion.

摘要

Colloidal silica-core silicone-shell particles, an emulsion containing, as a solid component, at least 30% by weight of the silica-core silicone-shell particles, and a process for prducing the emulsion.;A colloidal silica-core silicone-shell particles comprising(A) from 99.9 to 5% by weight of cores which are colloidal silica particles, and(B) from 0.1 to 95% by weight of shells comprising an organosiloxy group represented by the formula wherein R¹ which may be the same or different each represents a substituted or unsubstituted monovalent hydrocarbon group having 1 to 8 carbon atoms, Q represents hydrogen atom or an alkyl group having 1 to 6 carbon atoms, p is an integer of 1 to 3, and q is an integer of 0 to 2, with proviso that (p+q) is an integer of 1 to 3,or a polyorganosiloxane represented by the average composition formula wherein R² represents a substituted or unsubstituted monovalent hydrocarbon group having 1 to 8 carbon atoms and a is a number of 0.8 to 3.0.