发明名称 |
Aromatic polycarbonate resins and process for the preparation thereof. |
摘要 |
<p>Disclosed herein is an aromatic polycarbonate resin containing benzophenone and benzoate ester derivatives which have a molecular weight less than 1,000, each in an amount of 100 ppm or less. Also disclosed is a process for preparing an aromatic polycarbonate resin from an aromatic dihydroxy compound and a carbonate diester in which the benzophenone derivative content is 100 ppm or less by transesterification, comprising preparing a polycarbonate prepolymer having a viscosity average molecular weight of 5,000 to 20,000 using an iminocarboxylic acid or salt thereof as a transesterification catalyst and polymerizing the prepolymer in an extruder. The aromatic polycarbonate is colorless and transparent and is suitable for extrusion molding.</p> |
申请公布号 |
EP0584801(A2) |
申请公布日期 |
1994.03.02 |
申请号 |
EP19930113533 |
申请日期 |
1993.08.24 |
申请人 |
MITSUBISHI KASEI CORPORATION |
发明人 |
NUKUI, MASAHIRO;TAYAMA, TAKAO;KASHIWAGI, TAKESHI;KIMURA, MASATOSHI;SHOJI, HIDEKAZU |
分类号 |
C08G64/30;(IPC1-7):C08G64/30;C08G64/04;C08K5/51 |
主分类号 |
C08G64/30 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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