Polymerizing silicone and acrylic monomers
AssigneesDow Silicones Corporation, Rohm and Haas Company
InventorsYang Cheng, Morris Wills, Hailan Guo, Nanguo Liu
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Abstract
A method of making a collection of polymer particles comprising (A) performing free radical polymerization (A) on an emulsion (E1) that comprises a collection of droplets dispersed in an aqueous medium, wherein the droplets comprise (i) one or more Si-containing monomers; (ii) one or more monovinyl acrylic monomers; and (iii) one or more graftlinkers that have no silicon atoms; to form a dispersion (D1) of core polymer particles in the aqueous medium; (B) in the presence of the dispersion (D1) of core polymer particles, performing aqueous emulsion polymerization (B) on one or more acrylic monomers.
Claims6
A method of making a collection of core/shell polymer particles comprising
- (A) performing free radical polymerization (A) on an emulsion (E1) that comprises a collection of droplets dispersed in an aqueous medium, wherein the droplets comprise
- (i) one or more monomers selected from monomers of structure (II),
- wherein every R1 is independently hydrogen or a hydrocarbon group;
- p is 0 to 1,000;
- every Ra is independently an organic group that contains one or more ethylenically unsaturated group;
- (ii) one or more monovinyl acrylic monomers;
- and
- (iii) one or more graftlinkers that have no silicon atoms;
- to form a dispersion (D1) of core polymer particles in the aqueous medium;
- (B) in the presence of the dispersion (D1) of core polymer particles, performing aqueous emulsion polymerization (B) on one or more acrylic monomers to form a shell on the core polymer particles, wherein the % grafting of the shell polymer is from 15% to 85%.
Dependencies are inferred from the claim text.