Dow Corning Corporation

Deborah Lynn Meyers

Bethany Johnson

Kenneth Michael Lee

Michael Kang-Jen Lee

Simon Toth

Isabelle Van Reeth

Jeffrey Rastello

Marilyn P Shope

David Lind

Bethany K Johnson

A process is disclosed for making an aqueous emulsion of a silicone polyether having a viscosity greater than 10 kPa-s at 25 QC by combining; an SiH terminated silicone polyether copolymer having an HLB of less than 7, an organopolysiloxane having terminal unsaturated groups, a hydrosilylation catalyst, and an emulsifier to form an oil phase, and then admixing water to the oil phase to form an emulsion.

Emulsions of high viscosity silicone polyethers

Emulsion compositions containing a silicone polymer and organic polymer as an alloy and/or hybrid emulsion can be made by (i) first forming an emulsion containing a silicone polymer by emulsion polymerization in which (a) the ring of a cyclic siloxane oligomer is opened, in which (b)an hydroxy endblocked siloxane oligomer is condensed, using an acid or base catalyst in the presence of water, or in which (c) an hydrogen endblocked siloxane oligomer and a vinyl endblocked siloxane oligomer are reacted by hydrosilylation using a catalyst; (ii) adding to the emulsion in (i) the components for preparing an emulsion containing an organic polymer by free radical emulsion polymerization of an ethylenically unsaturated organic monomer, and (iii) heating the emulsion. The resulting coalesced compositions produce polymer blends or alloys whose properties are influenced by the composition and morphology of the hybrid emulsion particles. The compositions may be spray dried whenever it is desired to employ the particles in powder type applications. In an embodiment, the two emulsions are prepared separately of one another and then combined.

Silicone polymer and organic polymer containing alloy and/or hybrid emulsion compositions

This invention relates to graft copolymers containing polydiorganosiloxane and polybutylene grafts. More particularly this invention relates to a graft copolymer having a backbone and two or more polymeric side chains, the copolymer formed from the copolymerization of at least one acryloxyalkyl-functional polydiorganosiloxane macromonomer, at least one acryl-terminated, carboxyl-functional polybutylene macromonomer, and at least one ethylenically unsaturated monomer which is copolymerizable with the polydiorganosiloxane and polybutylene macromonomers. This invention also relates to a method of making graft copolymers containing polydiorganosiloxane and polybutylene grafts.

Graft copolymers containing polydiorganosiloxane and polybutylene grafts

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Midland, MI, United States of America

Deborah Lynn Meyers