| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method of a vinyl chloride polymer having a small particle diameter, high bulk density, and less fish eyes, in less than 4 hr polymn. time. SOLUTION: In this manufacturing method of a vinyl chloride polymer, a vinyl chloride monomer is polymerized in the presence of an oil soluble polymn. initiator and a dispersion stabilizer in an aq. medium in not longer than 4 hr by suspension polymn. In this case, the conversion of vinyl chloride monomer to vinyl chloride polymer is in the range of 0.3-3.0% and the min. value of the average diameter of the liquid particle of the vinyl chloride monomer in terms of Sauter diameter is in the range of 30-60μm.
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