发明名称 |
Preparation of copolycarbonates |
摘要 |
A process for the preparation of transparent copolycarbonate is disclosed. The copolycarbonate the molecular structure of which contains more than 35 mole % of units derived from dihydroxydiphenylene is prepared by the melt transesterification process wherein the final temperature of the reaction is reached in less than 40 minutes after reaching the starting temperature.
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申请公布号 |
US6753405(B2) |
申请公布日期 |
2004.06.22 |
申请号 |
US20020195082 |
申请日期 |
2002.07.12 |
申请人 |
BAYER AKTIENGESELLSCHAFT |
发明人 |
KRATSCHMER SILKE;BUNZEL LOTHAR;DEML HANS |
分类号 |
C08J5/00;C08G64/30;(IPC1-7):C08G64/00 |
主分类号 |
C08J5/00 |
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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