Patent ID: 6719932
Filing Date: 2004-04-13
Classification: C09K,G02F,Y10S,Y10T

Abstract:
A process for forming a plurality of particles, comprising the steps of:(A) providing a first emulsion comprising a core material and one or more monomers in an aqueous phase, wherein at least one of the monomers is a crosslinking monomer containing two or more double bonds capable of free radical polymerization, and a second emulsion comprising seed particles; (B) combining the first emulsion and the second emulsion; (C) forming discrete domains, in the aqueous phase, wherein the domains comprise the core material and the one or more monomers, and (D) polymerizing the one or more monomers by free radical polymerization to form a plurality of particles, each particle comprising a discrete crosslinked polymer shell encasing the core material, wherein the plurality of particles have a polydispersity of from 1.3 to 1.0.