发明名称 |
Copolycarbonate preparation by solid state polymerization |
摘要 |
Copolycarbonates containing such structural units as birefringence-reducing or "soft block" units are prepared by conducting a reaction, such as melt polymerization or equilibration, between a precursor polycarbonate and a monomer, polycarbonate oligomer or high molecular weight polycarbonate which is a source of other structural units. The crystallinity of the resulting precursor copolycarbonate or one of the reagents employed in its preparation is enhanced and the precursor copolycarbonate is subjected to solid state polymerization.
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申请公布号 |
US6143859(A) |
申请公布日期 |
2000.11.07 |
申请号 |
US19990370433 |
申请日期 |
1999.08.09 |
申请人 |
GENERAL ELECTRIC COMPANY |
发明人 |
CHATTERJEE, GAUTAM;VARADARAJAN, GODAVARTHI SATYANARAYANA;DAY, JAMES;MCCLOSKEY, PATRICK JOSEPH;IDAGE, BHASKAR BHAIRAVNATH;KING, JR., JOSEPH ANTHONY;JADHAV, ARUN SAVALARAM |
分类号 |
C08G64/06;C08G64/18;C08G64/20;(IPC1-7):C08G64/00 |
主分类号 |
C08G64/06 |
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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