发明名称 |
VINYL RESIN PRODUCTION METHOD |
摘要 |
A dispersion stabilizer in the present invention contains an aqueous emulsion (a) obtained by dispersing a polymer (A) having an ethylenically unsaturated monomer unit in an aqueous medium, a PVA (B) having a degree of saponification of 65 mol % or more and less than 82 mol % and a viscosity-average degree of polymerization of 250 or more and less than 1500, and a PVA (C) having a degree of saponification of 82 mol % or more and less than 98 mol % and a viscosity-average degree of polymerization of 1500 or more and less than 4000. The dispersion stabilizer contains: 7 to 51 mass % of the polymer (A); 40 to 84 mass % of the PVA (B); and 9 to 53 mass % of the PVA (C), with respect to a total amount of the polymer (A), the PVA (B), and the PVA (C). A vinyl resin satisfying required performance can be obtained using the dispersion stabilizer. |
申请公布号 |
US2017029540(A1) |
申请公布日期 |
2017.02.02 |
申请号 |
US201515302281 |
申请日期 |
2015.04.08 |
申请人 |
KURARAY CO., LTD. ;KURARAY EUROPE GMBH |
发明人 |
FUKUHARA Tadahito;KUMAKI Yosuke;MICHEL Samuel;HARTMANN Dirk |
分类号 |
C08F114/06 |
主分类号 |
C08F114/06 |
代理机构 |
|
代理人 |
|
主权项 |
1. A method for producing a vinyl resin, comprising:
suspension polymerizing a vinyl compound in an aqueous medium using a dispersion stabilizer, wherein the dispersion stabilizer comprises: an aqueous emulsion (a) obtained by dispersing a polymer (A) having an ethylenically unsaturated monomer unit in an aqueous medium; a polyvinyl alcohol (B) with a degree of saponification of 65 mol % or more and less than 82 mol % and a viscosity-average degree of polymerization of 250 or more and less than 1,500; and a polyvinyl alcohol (C) with a degree of saponification of 82 mol % or more and less than 98 mol % and a viscosity-average degree of polymerization of 1,500 or more and less than 4,000; wherein the dispersion stabilizer comprises: 7 to 51 mass % of the polymer (A); 40 to 84 mass % of the polyvinyl alcohol (B); and 9 to 53 mass % of the polyvinyl alcohol (C), with respect to a total amount of the polymer (A), the polyvinyl alcohol (B), and the polyvinyl alcohol (C). |
地址 |
Kurashiki-shi JP |