| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a vinyl chloride-based resin having a high bulk density, hardly causing fisheye, increasing the through put of a batch by using a polymerizer with a reflux condenser and exhibiting high productivity in a polymerization process. SOLUTION: When conducting suspension polymerization in an aqueous medium by using a polymerizer with a reflux condenser, vinyl chloride-based monomer is charged in a weight ratio of (aqueous medium/vinyl chloride-based monomer) of (0.5/1.0) to (1.2/1.0), and a partially saponified polyvinyl alcohol having a saponification degree of 65-85 mol% and hydroxypropyl methylcellulose as dispersants are added.
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