Process for preparing polycarbonate-co-ester using spray-crystallizing method

摘要

The present invention relates to a method for producing a high molecular weight polyester carbonate resin, and more particularly, a melt condensation polymerization step, a crystallization step, and a solid phase polymerization step in which a transesterification reaction, an ester reaction, and a short time condensation polymerization are continuously performed. It is a manufacturing method of the high molecular weight polyester carbonate resin to contain.;By using the method of preparing the polyester carbonate resin of the present invention, solid phase polymerization is performed without grinding and drying to reduce operating time and operating cost, and efficiently control crystallinity and crystal size to obtain high molecular weight of uniform physical properties. The polyester carbonate of can be provided.;Polyester carbonate, tin catalyst, crystallization, solid state polymerization