发明名称 |
Process for the preparation of polycarbonates |
摘要 |
An improvement in the continuous two-phase interfacial condensation process for preparing polycarbonate is disclosed. In the process that entails at least one diphenol, phosgene, at least one chain terminator, and optionally branching agents and is carried out in the presence of a catalyst the improvement comprising maintaining the concentration of the catalyst at a level of at least 0.012 mol per mol of diphenol.
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申请公布号 |
US2004158026(A1) |
申请公布日期 |
2004.08.12 |
申请号 |
US20040751621 |
申请日期 |
2004.01.05 |
申请人 |
KAUTH HERMANN;KORDS CHRISTIAN;HEUSER JURGEN |
发明人 |
KAUTH HERMANN;KORDS CHRISTIAN;HEUSER JURGEN |
分类号 |
C08G64/14;C08G64/24;(IPC1-7):C08G64/00 |
主分类号 |
C08G64/14 |
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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