MODIFIED VINYL ALCOHOL-BASED POLYMER, AND DISPERSION STABILIZER FOR SUSPENSION POLYMERIZATION

    公开(公告)号:EP3943515A1

    公开(公告)日:2022-01-26

    申请号:EP20837469.4

    申请日:2020-06-19

    发明人: WATANABE,Wataru

    摘要: A modified vinyl alcohol-based polymer includes a polyoxyalkylene unit, and an organic acid unit bonded to a polyvinyl alcohol chain, the polyoxyalkylene unit includes a moiety represented by the general formula (I), the moiety being bonded to the polyvinyl alcohol chain only via an ether bond and/or a carbon-carbon bond, wherein a ratio of a number of moles of monomer units bonded to the polyoxyalkylene unit to a total number of moles of the monomer units constituting the polyvinyl alcohol chain of the modified vinyl alcohol-based polymer is 0.01 mol% to 5 mol%, and a ratio of a number of moles of the organic acid unit to the total number of moles of the monomer units constituting the polyvinyl alcohol chain of the modified vinyl alcohol-based polymer is 0.1 mol% to 10 mol%.