| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method of a vinyl chloride polymer which permits economical polymerization and hardly causes scale deposition during polymerization so that heating or heat-removing performances of a jacket are not deteriorated. SOLUTION: The manufacturing method of the vinyl chloride polymer comprises feeding vinyl monomers mainly composed of a vinyl chloride monomer, a dispersant, a polymerization initiator and an aqueous medium to a jacketed polymerization reactor equipped with a circulation path for a cooling/heating medium in a polymerization reactor main body to form a dispersion and feeding to the circulation path a heating medium having a temperature satisfying the condition: T≤H≤T+4 to raise the temperature up to 45-75°C to proceed dispersion polymerization. In the formula, T is a polymerization temperature (°C) and H is a temperature (°C) of the heating medium. COPYRIGHT: (C)2006,JPO&NCIPI
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