MANUFACTURING METHOD OF PVC POLYMER AND PVC COPOLYMER HAVING POLYOL

摘要

PURPOSE: A polyol-containing polyvinyl chloride polymer is provided to ensure excellent thermal stability by injecting polyol before or during polymerization and to improve primary coloration. CONSTITUTION: A method for preparing a polyol-containing polyvinyl chloride polymer comprises a step for injecting polyol before or during polymerization in one time or several times in a method for preparing a vinyl chloride polymer. The method for preparing a vinyl chloride polymer suspends and polymerizes the chlorinated vinyl monomer in the presence of a polymerization initiator and protective colloid.