| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a high-bulk density vinyl chloride- based polymer without causing the problem of the cloudiness of waste water. SOLUTION: This method for producing a vinyl chloride-based polymer is to use a polymer suspension dispersion stabilizer comprising (a) a partially saponified polyvinyl acetate having a specific saponification degree, (b) at least one kind or a combination of two or more kinds selected from the group consisting of a partially saponified polyvinyl acetate having a specific saponification degree, methyl cellulose, hydroxypropylmethyl cellulose, carboxymethyl cellulose, polyvinyl pyrrolidone, polyacrylic acid, a vinyl acetate-maleic acid copolymer, gelatin, starch and polyethylene oxide, and (c) a metal salt of alkali metals.
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