| abstract |
(57) [Summary] [Problem] A resin scale does not adhere to the inner wall of a polymerization vessel, and the obtained vinyl chloride resin has a sharp particle size distribution and a high bulk specific gravity. Provided is a suspension polymerization method capable of obtaining a vinyl chloride resin having extremely good processability. SOLUTION: When a vinyl chloride monomer is subjected to suspension polymerization, Partially saponified polyvinyl acetate, cellulose derivative, Various suspension polymerization agents such as sorbitan higher fatty acid esters having an HLB value of 3 to 10 are added, and the polymerization conversion rate is 0 to 5%. Up to 2.5 to 4.5 kW / m 3, and 0.2 to 1.5 kW until the polymerization conversion is 5 to 25%. W / m 3 . |