Patent ID: 6903164
Filing Date: 2005-06-07
Classification: C08C,C08F,Y10S

Abstract:
1. A process for the production of an epoxidized granular thermoplastic polymer, said polymer characterized in that the polymer comprises a shell-like surface layer insoluble in toluene at 25° C. formed on the polymer, and which is prepared by epoxidizing after a granular thermoplastic polymer has been suspended in water, wherein said process comprises: a first step of epoxidizing a granular thermoplastic polymer in a water medium in the presence of an epoxidizing agent or the epoxidizing agent and a solvent for accelerating an epoxidation reaction, and a phosphoric acid series compound to produce an epoxidized granular thermoplastic polymer; a second step of the washing with water, or the neutralization and washing with water of the epoxidized granular thermoplastic polymer; and a third step, if necessary, of removing the solvent for accelerating the epoxidation reaction which may be used in the first step.