发明名称 |
PROCESS FOR PREPARING POLYIMIDE HAVING EXCELLENT HIGH TEMPERATURE STABILITY |
摘要 |
This invention relates to a process for preparing polyimide having good heat-stability and excellent flowability in a molten state. The polyimide is prepared by reacting 3,3'-diaminobenzophnone or bis(3-aminophenyl)sulfone, tetracarboxylic dianhydrides such as pyromellitic dianhydride, 3,3',4,4'-benzophenonetetracarboxylic dianhydride and bis(3,4-dicarboxyphenyl) ether dianhydride; and dicarboxylic anhydrides such as glutaric anhydride, 1,2-hexanedicarboxylic anhydride, phthalic anhydride and 3,4-benzophenonedicarboxylic anhydride. The molar ratio of aromatic diamine : tetracarboxylic dianhydride : dicarboxylic anhydride is 1 :(0.9 to 1.0) : (0.001 to 1.0).
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申请公布号 |
CA1334774(C) |
申请公布日期 |
1995.03.14 |
申请号 |
CA19890604680 |
申请日期 |
1989.07.04 |
申请人 |
MITSUI TOATSU CHEMICALS, INC. |
发明人 |
OHTA, MASAHIRO;KAWASHIMA, SABURO;IIYAMA, KATSUAKI;TAMAI, SHOJI;OIKAWA, HIDEAKI;YAMAGUCHI, AKIHIRO |
分类号 |
C08G73/10;C08G73/14;(IPC1-7):C08G73/10 |
主分类号 |
C08G73/10 |
代理机构 |
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