| 摘要 |
PROBLEM TO BE SOLVED: To provide a gas-permeable polyimide film having excellent gas-permeability. SOLUTION: The polyimide film is obtained by imidizing a polyamic acid film comprising a polyamic acid. A product obtained by a polyaddition reaction of an aromatic diamine having at least one trimethylsilyl group bonded to an aromatic ring with an aromatic tetracarboxylic dianhydride is used as the polyamic acid. For example, 5-trimethylsilyl-1,3-phenylenediamine, 1,4-bis(4'-aminophenoxy)-2,5-bis(trimethylsilyl)benzene or the like is used as the aromatic diamine. COPYRIGHT: (C)2004,JPO&NCIPI
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