发明名称 |
Method of preparing poly(vinyl pivalate) by low temperature suspension-polymerization of vinyl pivalate, and poly(vinyl pivalate) and poly(vinyl alcohol) prepared using same |
摘要 |
Poly(vinyl pivalate) exhibiting a high syndiotacticity and a high molecular weight is prepared through suspension polymerization of vinyl pivalate at low temperatures. Furthermore, poly(vinyl pivalate) microspheres with a high syndiotacticity is prepared for use as a precursor for PVA with a high molecular weight and a high syndiotacticity through suspension polymerization of vinyl pivalate at 20 to 70° C. with the use of azobisdimethylvaleronitrile as an initiator. In addition, poly(vinyl pivalate) is separated using a dispersing agent and a precipitating agent to thereby prepare poly(vinyl pivalate) microspheres with various sizes and a uniform size distribution. The poly(vinyl pivalate) microspheres are suspended in an aqueous alkali soloution such that only the surface thereof is saponified to PVA. In this way, embolic particles with a spherical shape are obtained to be useable as an embolic material for embolotherapy. |
申请公布号 |
US2006235132(A1) |
申请公布日期 |
2006.10.19 |
申请号 |
US20060435209 |
申请日期 |
2006.05.15 |
申请人 |
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发明人 |
LYOO WON-SEOK;GHIM HAN-DO;YEUM JEONG-HYUN;PARK CHAN-SHIK;YOON WONG-JAE;NOH TAE-HWAN;SHIN DONG-YOON |
分类号 |
A61L31/00;C08L9/00;A61K31/765;A61P9/00;A61P31/06;A61P35/00;C08F2/20;C08F8/12;C08F18/08;C08F18/10;C08F118/10;D01F6/16 |
主分类号 |
A61L31/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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