METHOD FOR PREPARING VINYL CHLORIDE-BASED RESIN BY USING SUSPENSION POLYMERIZATION

摘要

The present invention relates to a method for preparing a vinyl-based polymer and a vinyl-based copolymer including a vinyl chloride-based material through suspension polymerization in which the generation of foam is prevented while maintaining the pressure by slowly increasing the reaction temperature when the pressure starts to drop at a reaction terminal stage. In the method for preparing a vinyl-based resin, a vinyl chloride-based monomer is suspension polymerized to reduce the generation of foam and improve the quality of protrusions, thermal stability and the like.