发明授权
US5981051A Method for producing granular polycarbonate prepolymer for solid-state
polymerization
失效
用于固相聚合的颗粒状聚碳酸酯预聚物的制备方法
- 专利标题： Method for producing granular polycarbonate prepolymer for solid-state polymerization
- 专利标题（中）： 用于固相聚合的颗粒状聚碳酸酯预聚物的制备方法
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申请号： US29069申请日： 1998-03-02
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公开(公告)号： US5981051A公开(公告)日： 1999-11-09
- 发明人: Hiroaki Motegi , Noriyuki Kunishi , Akihiro Shishikura
- 申请人： Hiroaki Motegi , Noriyuki Kunishi , Akihiro Shishikura
- 申请人地址： JPX Tokyo
- 专利权人： Idemitsu Petrochemical Co., Ltd.
- 当前专利权人： Idemitsu Petrochemical Co., Ltd.
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX7-223630 19950831
- 主分类号： B29B9/12
- IPC分类号： B29B9/12 ; C08G64/20 ; C08J3/12 ; C08J3/14 ; B32B3/26
摘要：
Provided is a method for producing a granular polycarbonate prepolymer for solid-phase polymerization, comprising dissolving a polycarbonate prepolymer in a solvent under heat, then crystallizing it by cooling, and shaping it. The grains of the granular prepolymer hardly fuse together in polymerization, and the granular prepolymer is suitable for high-speed solid-phase polymerization to give polycarbonate.
公开/授权文献
- USD364855S Display apparatus for electronic computers 公开/授权日：1995-12-05