发明名称 |
Heat-stable polyimides and polyamide-imides with modified benzhydrol structural elements and their preparation |
摘要 |
Heat-stable polyimides and polyamideimides with modified benzhydrol structural elements and a process of preparing thereof; wherein the polyimides and polyamideimides are obtained by reacting 3,3'4,4'-benzhydroltetracarboxylic acid dimethyl ester a) with only a diamine and then cyclized to give polyimides or b) with a diamine and with trimellitic, phthalic-or isophthalic acid (or the anhydrides, acid chlorides, anhydride chlorides or esters) and is then cyclized to give polyamideimides.
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申请公布号 |
US5378799(A) |
申请公布日期 |
1995.01.03 |
申请号 |
US19930119650 |
申请日期 |
1993.09.13 |
申请人 |
CHEMIE LINZ GMBH |
发明人 |
GREBER, DECEASED, GERHARD;GRUBER, HEINRICH;SYCHRA, MARCEL |
分类号 |
C08G73/10;C08G73/14;(IPC1-7):C08G69/26 |
主分类号 |
C08G73/10 |
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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