发明申请
- 专利标题: METHOD FOR CONTINUOUS PRODUCTION OF HIGH MOLECULAR WEIGHT POLYCARBONATE RESIN
- 专利标题(中): 连续生产高分子量聚碳酸酯树脂的方法
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申请号: US14400640申请日: 2013-05-14
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公开(公告)号: US20150133611A1公开(公告)日: 2015-05-14
- 发明人: Yoshinori Isahaya , Atsushi Hirashima , Hidefumi Harada , Maki Ito , Jun-ya Hayakawa , Takehiko Isobe , Taichi Tokutake , Yousuke Shinkai
- 申请人: MITSUBISHI GAS CHEMICAL COMPANY, INC.
- 申请人地址: JP Tokyo
- 专利权人: MITSUBISHI GAS CHEMICAL COMPANY, INC.
- 当前专利权人: MITSUBISHI GAS CHEMICAL COMPANY, INC.
- 当前专利权人地址: JP Tokyo
- 优先权: JP2012-114936 20120518
- 国际申请: PCT/JP2013/063345 WO 20130514
- 主分类号: C08G64/30
- IPC分类号: C08G64/30 ; C08G64/06
摘要:
A high molecular weight polycarbonate resin is continuously produced by subjecting an aromatic polycarbonate prepolymer and an aliphatic diol compound to a linking and highly polymerizing reaction. Even an aliphatic diol compound having a comparatively low boiling point can be allowed to efficiently contribute to the linking and highly polymerizing reaction. An aromatic polycarbonate prepolymer is produced by a polycondensation reaction between an aromatic dihydroxy compound and a diester carbonate, adding an aliphatic diol compound having an aliphatic group bonding to a terminal hydroxyl group to obtain a prepolymer mixture, and subjecting the resulting prepolymer mixture to a linking and highly polymerizing reaction under reduced pressure. The aliphatic diol compound is added at a pressure exceeding 200 torr, and the prepolymer mixture is subjected to a linking and highly polymerizing reaction before the terminal hydroxyl group concentration of the aromatic polycarbonate prepolymer in the prepolymer mixture reaches 2000 ppm.
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