发明名称 |
Chain-extending phenolic end-capped polyimides |
摘要 |
Aromatic polyimides with phenolic end groups are chain-extended (molecular weight increased) by reacting them with formaldehyde, compounds capable of generating formaldehyde under the reaction conditions or hexamethylene tetramine in the presence of a catalytic amount of lime. These polyimides can be shaped and formed prior to the chain-extending.
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申请公布号 |
US4026871(A) |
申请公布日期 |
1977.05.31 |
申请号 |
US19750558451 |
申请日期 |
1975.03.14 |
申请人 |
UNIVERSITY OF NOTRE DAME |
发明人 |
D'ALELIO, GAETANO FRANCIS |
分类号 |
C08G18/64;C08G73/10;(IPC1-7):C08G73/10 |
主分类号 |
C08G18/64 |
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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