- 专利标题: Method of polycarbonate preparation
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申请号: US11133827申请日: 2005-05-19
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公开(公告)号: US07115700B2公开(公告)日: 2006-10-03
- 发明人: James Anthony Cella , Jan Henk Kamps , Jan Pleun Lens , Kathryn Lynn Longley , Patrick Joseph McCloskey , Narayan Ramesh , Warren William Reilly , Paul Michael Smigelski, Jr. , Marc Brian Wisnudel
- 申请人: James Anthony Cella , Jan Henk Kamps , Jan Pleun Lens , Kathryn Lynn Longley , Patrick Joseph McCloskey , Narayan Ramesh , Warren William Reilly , Paul Michael Smigelski, Jr. , Marc Brian Wisnudel
- 申请人地址: US 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: US NY Schenectady
- 代理机构: Marina Larson & Associates, LLC
- 主分类号: C08G63/00
- IPC分类号: C08G63/00
摘要:
Polycarbonates containing low or undetectable levels of Fries rearrangement products and comprising repeat units derived from one or more of resorcinol, hydroquinone, methylhydroquinone, bisphenol A, and 4,4′-biphenol have been prepared by the melt reaction of one or more of the aforementioned dihydroxy aromatic compounds with an ester-substituted diaryl carbonate such as bis-methyl salicyl carbonate. Low, or in many instances undetectable, levels of Fries rearrangement products are found in the product polycarbonates obtained as the combined result of a highly effective catalyst system which suppresses the Fries reaction and the use of lower melt polymerization temperatures relative to temperatures required for the analogous polymerization reactions using diphenyl carbonate.
公开/授权文献
- US20050261460A1 Method of polycarbonate preparation 公开/授权日:2005-11-24
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