| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a vinyl chloride-based polymer being excellent in molding processability represented by a gelling property, draw down property, flowability as a powder, a handling property or the like since it has a graft copolymerization structure. <P>SOLUTION: The method for manufacturing the vinyl chloride-based polymer includes Step (I): a step for obtaining vinyl chloride-based macro-initiator (C) by performing suspension polymerization of specific monomer (A) and vinyl chloride monomer (B) in the presence of a radical polymerization initiator and a dispersing agent in a water-based medium and Step (II): a step for manufacturing the vinyl chloride-based polymer by performing graft copolymerization of the vinyl chloride-based macro-initiator (C) obtained in Step (I) and at least one monomer (D) selected from the group consisting of alkyl acrylates, alkyl methacrylates and vinyl carboxylate in the presence of a living radical polymerization catalyst and a dispersing agent in a water-based medium. <P>COPYRIGHT: (C)2012,JPO&INPIT |
