发明授权
- 专利标题： Purification process of aliphatic polyester
- 专利标题（中）： 脂肪族聚酯的净化过程
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申请号： US305785申请日： 1994-09-14
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公开(公告)号： US5496923A公开(公告)日： 1996-03-05
- 发明人: Hiroshi Suizu , Masatoshi Takagi , Masanobu Ajioka , Akihiro Yamaguchi
- 申请人： Hiroshi Suizu , Masatoshi Takagi , Masanobu Ajioka , Akihiro Yamaguchi
- 申请人地址： JPX Chiyoda
- 专利权人： Mitsui Toatsu Chemicals, Inc.
- 当前专利权人： Mitsui Toatsu Chemicals, Inc.
- 当前专利权人地址： JPX Chiyoda
- 优先权： JPX5-233363 19930920; JPX5-323762 19931222
- 主分类号： C08G63/90
- IPC分类号： C08G63/90 ; C08F6/02
摘要：
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. The process 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.
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