发明名称 |
Polyimide precursor solution, process for the production thereof, coating or film obtained therefrom and process for producing the film |
摘要 |
<p>This invention provides a polyimide precursor solution having high concentration and low viscosity and a production process thereof, and polyimide coatings and films having excellent physical properties obtained therefrom and a production process thereof. Particularly, it relates to a polyimide precursor solution which contains a salt of a specific diamine with a specific tetracarboxylic acid, as its solute; to a process for the production of the polyimide precursor solution, which comprises allowing 1 mole of a specified diamine to react with 0.3 to 0.9 mole of a specific tetracarboxylic acid dianhydride, thereby obtaining a diamine, and subsequently adding 0.95 to 1.05 moles of a specified tetracarboxylic acid to 1 mole of the thus obtained diamine; to a polyimide coating or film obtained from the aforementioned polyimide precursor solution; and to a process for the production of the polyimide coating or film, which comprises coating the aforementioned polyimide precursor solution on a substrate and heating the coat to effect imidization.</p> |
申请公布号 |
EP0811648(A1) |
申请公布日期 |
1997.12.10 |
申请号 |
EP19970108919 |
申请日期 |
1997.06.03 |
申请人 |
UNITIKA LIMITED. |
发明人 |
SETO, KEITAROU;ECHIGO, YOSHIAKI;OKAMOTO, SHOJI;SAITOU, MINORU |
分类号 |
C07C233/75;C07C235/56;C07C317/44;C08G73/10;(IPC1-7):C08G73/10;C07C237/28 |
主分类号 |
C07C233/75 |
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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