Patent ID: 6995210
Filing Date: 2006-02-07
Classification: C08J

Abstract:
1. A process for the preparation of an aqueous dispersion of silicone oil(s) comprising: 100 parts by weight of at least one polyorganosiloxane oil (A) capable of crosslinking into an elastomer by condensation, if necessary in the presence of a crosslinking agent (B); optionally, from 0.1 to 100 parts by weight of at least one crosslinking agent (B); optionally, up to 50 parts by weight of at least one adhesion promoter (C); greater than 0 up to 200 parts by dry weight of a filler (D); a catalytically effective amount of a catalytic curing compound (E); at least one emulsifier (F); optionally, at least one functional additive (G); and water; said process comprising the steps of: preparing an emulsion by blending a mixture consisting of: 100 parts by weight of a silicone phase (φs) with a dynamic viscosity at 25° C. of at least 10 Pa.s, φs comprising the oil or a mixture of oils (A) already polymerized, and optionally at least one of the constituents (B), (C) or (E); 0.5–20 parts by weight of at least one emulsifier (F), the HLB value of said emulsifier or of the mixture of emulsifiers being at least 10; the filler (D); 2–20 parts by weight of water; optionally, diluting with water until a solids content from 25% to 97% is obtained; and, then, adding the constituent(s) not present in the silicone phase (φs) and the filler (D); Ss≦5.