Patent ID: 6121397
Filing Date: 2000-09-19
Classification: C08F

Abstract:
A process for the preparation of a thermoplastic resin comprising:forming a miniemulsion comprised of a mixture of an oligomeric compound of the formula R-SFR, wherein R is an oligomer comprised of from about 1 to about 30 monomer units, -SFR is a covalently bound stable free radical end group, and at least one free radical polymerizable monomer compound, and a surfactant, wherein the miniemulsion is formed in a high shear mixing device for about 1 to about 60 minutes at a pressure of about 1,000 to about 10,000 psi, and wherein the resulting miniemulsion droplets have a volume average diameter of from about 100 to about 400 nanometers and contain the oligomeric compound and polymerizable monomer compound; andheating the miniemulsion at a temperature of from about 70 to about 200.degree. C. for from about 1 to about 40 hours, wherein there results a precipitation resistant latex thermoplastic resin with a high monomer to polymer conversion of about 85 to about 100 percent and a narrow polydispersity of from about 1.1 to about 2.0.