发明授权
- 专利标题： Method for making aromatic polycarbonates
- 专利标题（中）： 制备芳族聚碳酸酯的方法
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申请号： US190395申请日： 1994-02-02
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公开(公告)号： US5391692A公开(公告)日： 1995-02-21
- 发明人: Eugene P. Boden , Peter D. Phelps , David L. Ramsey , Paul D. Sybert , Larry I. Flowers , Roy R. Odle
- 申请人： Eugene P. Boden , Peter D. Phelps , David L. Ramsey , Paul D. Sybert , Larry I. Flowers , Roy R. Odle
- 申请人地址： NY Schenectady
- 专利权人： General Electric Company
- 当前专利权人： General Electric Company
- 当前专利权人地址： NY Schenectady
- 主分类号： C08G64/22
- IPC分类号： C08G64/22 ; C08G64/24 ; C08G64/40 ; C08G64/00
摘要：
A method is provided for making polycarbonate utilizing an effective amount of a phase transfer catalyst, such as tetrabutylammonium bromide as a condensation catalyst during the interfacial phosgenation of a bisphenol, such as bisphenol A. Improved phosgene utilization is achieved.
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