PRODUCING METHOD OF POLYLACTIDE, CAPABLE OF COLLECTING A LACTIDE MONOMER FROM THE POLYLACTIDE AND PRODUCING A POLYLACTIDE PARTICLE

摘要

PURPOSE: A producing method of polylactide is provided to simplify the producing process of the polylactide by performing the removal of a lactide monomer and the granulate process of the polylactide in one reactor.;CONSTITUTION: A producing method of polylactide comprises a step of stirring the polylactide and a lactide monomer and a step of performing devolatilization and cooling processes. The stirring process is performed by a kneader inside a kneader reactor. The cooling process is performed at a temperature below the melting point of the polylactide. The temperature of the reactor is 50~150 deg C. The devolatilization process is performed by maintaining the pressure inside the reactor at 1~100 torr.;COPYRIGHT KIPO 2010