公开(公告)号：US20160347883A1

公开(公告)日：2016-12-01

申请号：US15116748

申请日：2015-02-04

Applicant: KURARAY CO., LTD.

Inventor： Yosuke KUMAKI ,  Takeshi KUSUDOU ,  Shunsuke FUJIOKA

IPC: C08F114/06 ,  C08F116/06

CPC classification number: C08F114/06 ,  B01F17/0028 ,  C08F2/20 ,  C08F8/00 ,  C08F8/12 ,  C08F14/06 ,  C08F116/06 ,  C08F118/08 ,  C08F216/06 ,  C08F220/44 ,  C08F220/56 ,  C08F2810/30 ,  C08F218/08 ,  C08L27/06 ,  C08L29/04

Abstract: There is provided a dispersing agent for suspension polymerization of a vinyl compound comprising a polyvinyl alcohol with a saponification degree of 65 to 90 mol % which satisfies Formulas (1) to (3). It allows for reducing the amount of coarse particles during polymerization and can thus provide a vinyl polymer with a sharp particle size distribution and higher plasticizer absorbability. 0.4≦(MwUV/MwRI)≦0.95  (1) 3≦(MwUV/MnUV)≦12  (2) 0.1≦A220≦0.8  (3)