发明公开
- 专利标题： Process for preparing polyimides
- 专利标题（中）： Verfahren zur Herstellung von Polyimiden。
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申请号： EP89301875.4申请日： 1989-02-24
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公开(公告)号： EP0330505A1公开(公告)日： 1989-08-30
- 发明人: Ohta, Masahiro , Iiyama, Katsuaki , Kawashima, Saburo , Tamai, Shoji , Oikawa, Hideaki , Yamaguchi, Akihiro
- 申请人： MITSUI TOATSU CHEMICALS, Inc.
- 申请人地址： 2-5 Kasumigaseki 3-chome Chiyoda-Ku Tokyo 100 JP
- 专利权人： MITSUI TOATSU CHEMICALS, Inc.
- 当前专利权人： MITSUI TOATSU CHEMICALS, Inc.
- 当前专利权人地址： 2-5 Kasumigaseki 3-chome Chiyoda-Ku Tokyo 100 JP
- 代理机构： Allam, Peter Clerk
- 优先权： JP45781/88 19880301; JP45780/88 19880301; JP40706/88 19880225; JP44619/88 19880229; JP315087/88 19881215; JP315088/88 19881215; JP315086/88 19881215; JP316122/88 19881216
- 主分类号： C08G73/10
- IPC分类号： C08G73/10
摘要：
A process for preparing a polyimide by reaction of a diamine and a tetracarboxylic dianhydride to obtain a polyamide acid and subjecting the polyamide acid to conversion into a polyimide thermally or chemically. The reaction in the process is carried out in the presence of at least one dicarboxylic anhydride selected from the group consisting of aliphatic dicarboxylic anhydrides and aromatic dicarboxylic anhydrides, and the amount of the tetracarboxylic dianhydride is in the range of from 0.9 to 1.0 mole per mole of the diamine and the amount of the dicarboxylic anhydride is in the range of from 0.001 to 1.0 mole per mole of the diamine. The resultant polyimides exhibit good thermal stability at high temperatures and good forming processability even at low temperatures.
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