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

摘要

The present invention relates to a process for producing a polyester carbonate resin having a high molecular weight, the melt polycondensation step and more particularly, condensation polymerization of the ester exchange reaction and esterification reaction, and a short time is made continuously, the crystallization step, and solid-phase polymerization step It includes a method of producing a polyester carbonate resin having a high molecular weight. ; The present invention of polyester-carbonate Using the method of manufacturing the resin grinding process and by carrying out solid state polymerization without drying operation time, and reduce the operation cost, and the crystallinity and high molecular weight having a uniform physical property by effectively controlling the size of the crystal of the can provide a polyester carbonate. ; Polyester carbonate, tin-based catalysts, the crystallization, solid phase polymerization