发明名称 |
Process for producing aromatic polycarbonate |
摘要 |
A process for producing an aromatic polycarbonate having a weight average molecular weight of from 7,000 to 60,000 is disclosed, comprising melt polycondensing an aromatic diol compound (e.g., bisphenol A) and a diaryl carbonate compound (e.g., diphenyl carbonate) in the presence of a combination of (a) an alkali metal compound and (b) a phosphonium hydroxide compound (e.g., tetraethylphosphonium hydroxide) as an interesterification catalyst. The aromatic polycarbonate has improved heat resistance and hue.
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申请公布号 |
US5527875(A) |
申请公布日期 |
1996.06.18 |
申请号 |
US19950386268 |
申请日期 |
1995.02.09 |
申请人 |
MITSUBISHI CHEMICAL CORPORATION |
发明人 |
YOKOYAMA, MASUZO;KEITOKU, FUMIO;TAKANO, JUNJI;HASEGAWA, MASAMI;TATSUKAWA, YUKIKO |
分类号 |
C08G64/20;C08G64/30;(IPC1-7):C08G64/00 |
主分类号 |
C08G64/20 |
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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