发明名称 |
Purification process of aliphatic polyester. |
摘要 |
<p>The invention is a purification process of an aliphatic polyester prepared in the presence of a catalyst from a hydroxycarboxylic acid or a cyclic ester of a hydroxycarboxylic acid, or a combination of an aliphatic polyhydric alcohol with an aliphatic polybasic acid, or a mixture of these compounds, comprising deactivating the catalyst while maintaining the aliphatic polyester in a molten or dissolved state, or insolubilizing and separating the catalyst and successively removing low molecular compounds; and can provide aliphatic polyester which has a low content of unreacted monomers and low molecular weight compounds and is excellent in heat resistance and weatherability.</p> |
申请公布号 |
EP0644219(A1) |
申请公布日期 |
1995.03.22 |
申请号 |
EP19940114635 |
申请日期 |
1994.09.16 |
申请人 |
MITSUI TOATSU CHEMICALS, INC. |
发明人 |
SUIZU, HIROSHI;TAKAGI, MASATOSHI;AJIOKA, MASANOBU;YAMAGUCHI, AKIHIRO |
分类号 |
C08G63/90;(IPC1-7):C08G63/90;C08G63/16;C08G63/06 |
主分类号 |
C08G63/90 |
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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