| 摘要 |
PURPOSE:To provide the titled film containing two kinds of recurring units at a specific ratio, and giving improved adhesivity when bonded with an epoxy adhesive without lowering the mechanical properties, heat-resistance, etc. CONSTITUTION:(A) An aromatic tetracarboxylic acid compound (e.g. 2,3,3',4'- biphenyltetracarboxylic acid) is made to react with (B) an aromatic diamine component containing (i) 95-99.5mol% phenylenediamine compound and (ii) 0.1-5mol% diaminodiphenylmethane compound (e.g. 4,4'-diamino-3,3',5,5'- tetrachlorodiphenylmethane) e.g. in an organic polar solvent at <=100 deg.C. The obtained polyamic acid is dissolved in a solvent to a polymer concentration of 5-40wt%, and the solution is imidated simultaneous to the film-forming e.g. by a dry-film forming process to obtain the objective film containing >=95mol% recurring unit of formula I and 0.1-5mol% recurring unit of formula II (R is halogen, etc.; n is 1 or 2; m is 0 or 1).
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