POLY(VINYL ALCOHOL)-BASED RESIN, METHOD FOR PRODUCING POLY(VINYL ALCOHOL)-BASED RESIN, DISPERSANT, AND DISPERSANT FOR SUSPENSION POLYMERIZATION
申请人:Mitsubishi Chemical Corporation
公开号:EP3950728A1
公开(公告)日:2022-02-09
An object of the present invention is to provide a PVA-based resin having a degree of saponification obtained in the middle stage of the reaction, that is, an average degree of saponification of 68 mol% to 85 mol%, a narrow degree of saponification distribution, and excellent dispersion stability. The present invention relates to a polyvinyl alcohol-based resin having an average degree of saponification of 68 mol% to 85 mol%, and a 1/4 value width of 7.0 minutes or less in a degree of saponification distribution obtained by high performance liquid chromatogram measured under specific conditions.
本发明的目的是提供一种聚乙烯醇基树脂,其皂化度在反应的中间阶段获得,即平均皂化度为 68 摩尔%至 85 摩尔%,皂化度分布窄,分散稳定性好。本发明涉及一种聚乙烯醇基树脂,其平均皂化度为 68 摩尔%至 85 摩尔%,在特定条件下通过高效液相色谱测量得到的皂化度分布的 1/4 值宽度为 7.0 分或更小。