Patent ID: 6479583
Filing Date: 2002-11-12
Classification: C08G,C09D

Abstract:
A method of making an emulsion or latex containing polymer particles with a diameter greater than 0.02 micron (micrometer) comprising (i) forming a microemulsion containing particles of oligomers with a diameter less than 0.02 micron (micrometer) by combining water, at least one surfactant, a hydride functional organosilicon oligomer or a mixture of such oligomers, and an alkenyl functional organosilicon oligomer or a mixture of such oligomers; (ii) adding a hydrosilylation catalyst to the microemulsion; (iii) initiating polymerization of the oligomers; and (iv) continuing polymerization until an emulsion or latex is formed containing polymer particles with a diameter greater than 0.02 micron (micrometer); the oligomers each having a viscosity of 1-50 centistoke (mm2/s), and at least one of the oligomers containing more than two reactive sites.