发明名称 |
Dispersion stabilizer for suspension polymerization and vinyl resin production method |
摘要 |
There is provided a dispersion stabilizer for suspension polymerization comprising a vinyl alcohol polymer (A), wherein the vinyl alcohol polymer (A) has a terminal anionic group and has a saponification degree of 30 to 60 mol %, a viscosity average polymerization degree of 650 or less, and a proportion of polymer molecules having a molecular weight of 8000 or less as determined by gel permeation chromatography is 9.5% by mass or less. When a vinyl compound is suspension-polymerized using the dispersion stabilizer for suspension polymerization, its higher polymerization stability allows for providing particles having a uniform size with a less amount of coarse particles, even under the conditions favorable for unstable polymerization. |
申请公布号 |
US9505921(B2) |
申请公布日期 |
2016.11.29 |
申请号 |
US201314653065 |
申请日期 |
2013.12.26 |
申请人 |
KURARAY CO., LTD. |
发明人 |
Fukuhara Tadahito;Kumaki Yosuke |
分类号 |
C08G63/48;C08F8/00;C08F218/02;C08F210/00;C08L29/04;C08J3/00;C08F2/20;C08F116/06;C08F216/06 |
主分类号 |
C08G63/48 |
代理机构 |
Oblon, McClelland, Maier & Neustadt, L.L.P. |
代理人 |
Oblon, McClelland, Maier & Neustadt, L.L.P. |
主权项 |
1. A dispersion stabilizer comprising a vinyl alcohol polymer (A), wherein
the vinyl alcohol polymer (A) has an anionic group only at polymer chain terminals and has a saponification degree of 30 to 60 mol % and a viscosity average polymerization degree of 650 or less, and a proportion of polymer molecules having a molecular weight of 8000 or less as determined by gel permeation chromatography is 9.5% by mass or less. |
地址 |
Kurashiki-shi JP |