再颁专利
- 专利标题： Process for the purification of polycarbonate and polyester carbonate solutions
- 专利标题（中）： 聚碳酸酯和聚酯碳酸酯溶液的净化方法
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申请号： US856830申请日： 1997-05-15
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公开(公告)号： USRE36432E公开(公告)日： 1999-12-07
- 发明人: Gerhard Fennhoff , Pieter Ooms , Hans-Josef Buysch , Ralf Pakull
- 申请人： Gerhard Fennhoff , Pieter Ooms , Hans-Josef Buysch , Ralf Pakull
- 申请人地址： DEX Leverkusen
- 专利权人： Bayer Aktiengesellschaft
- 当前专利权人： Bayer Aktiengesellschaft
- 当前专利权人地址： DEX Leverkusen
- 优先权： DEX4312391 19930416
- 主分类号： C08G63/64
- IPC分类号： C08G63/64 ; C08G63/88 ; C08G63/90 ; C08G64/40 ; C08F6/00
摘要：
A process for purifying aromatic carbonate polymers, including polycarbonates and polyestercarbonates, is disclosed. Accordingly, a carbonate polymer is an organic solvent is rendered virtually free of low molecular weight components by agitation with aluminosilicate or by passing through layers of such aluminosilicate. The aluminosilicate is subsequently separated off and the carbonate polymer is isolated in known methods.
公开/授权文献
- US4144251A 5-Unsaturated prostanoic acid derivatives 公开/授权日：1979-03-13
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