| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a vinyl chloride copolymer resin having excellent powder fluidity from a copolymer produced by the copolymerization of a vinyl chloride monomer and a macromonomer having a polymer composed of an ethylenic unsaturated monomer having double bond in the main chain of the macromonomer without causing the blocking of the copolymer. SOLUTION: A vinyl chloride copolymer resin is produced by the copolymerization of a vinyl chloride monomer and a macromonomer having a polymer composed of an ethylenic unsaturated monomer having double bond in the main chain of the macromonomer. The ratio of the vinyl chloride monomer to the total monomer components constituting the vinyl chloride copolymer resin is≥50 wt.% and≤90 wt.%, and the dehydrated resin after the polymerization is charged into a flow drier and dried at a heating gas temperature of≥45°C and≤65°C. COPYRIGHT: (C)2007,JPO&INPIT
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