发明名称 |
Preparation of resin composition from cyclic polycarbonate oligomers from spirobiindane bisphenol |
摘要 |
Cyclic polycarbonate mixtures containing units derived from spirobiindane bisphenols, preferably 6,6'-dihydroxy-3,3,3',3'-tetramethylspirobiindane are prepared from the corresponding bischloroformates or mixtures thereof with bisphenols. They may be homopolymeric or copolymeric; cyclic oligomer mixtures are preferred. Such oligomers may be converted to linear polycarbonates having high glass transition temperatures.
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申请公布号 |
US4775741(A) |
申请公布日期 |
1988.10.04 |
申请号 |
US19870059297 |
申请日期 |
1987.06.08 |
申请人 |
GENERAL ELECTRIC COMPANY |
发明人 |
BRUNELLE, DANIEL J.;EVANS, THOMAS L.;SHANNON, THOMAS G. |
分类号 |
C08G64/06;C08G65/40;(IPC1-7):C08G63/62 |
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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