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

摘要

Disclosed is a method of preparing a vinyl based polymer and copolymer comprising a vinyl chloride based polymer and copolymer using suspension polymerization to prevent forming by elevating slowly reaction temperature such that pressure is maintained when pressure drops in the late stages of reaction. According to the method, the vinyl chloride based resin is prepared using suspension polymerizing vinyl chloride based monomers so as to reduce foaming and improve a protrusion, thermal stability and the like.

主权项

1. A method of preparing a vinyl chloride based resin,
wherein temperature is elevated at a rate of greater than 0.008° C./min and less than 0.8° C./min for greater than 10 minutes and less than 90 minutes when reaction pressure is reduced to greater than 0.01 kgf/cm2 and less than 0.5 kgf/cm2 after initiation of suspension polymerization.