SUSPENSION POLYMERIZATION METHOD FOR POLYVINYLCHLORIDE AND POLYVINYLCHLORIDE PRODUCED THEREBY

摘要

PURPOSE: A suspension polymerization method for polyvinylchloride is provided to ensure high polymerization productivity and to prepare a polymer with a small amount of fish eye and excellent initial coloration. CONSTITUTION: A suspension polymerization method for a vinyl chloride polymer comprises the steps of: injecting 50~80% of whole chlorinated vinyl monomer in initial polymerization; and when a polymerization conversion rate is 15~30%, injecting the residual chlorinated vinyl monomer and completing. Based on the chlorinated vinyl monomer 100.0 parts by weight, a solvent, polymerization initiator, and protective colloid preparation are respectively used in the amount of 120-150 parts by weight, 0.02-0.2 parts by weight, and 0.03-5 parts by weight.