| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a production method by which a porous film comprising an amideimide-based polymer or an imide-based polymer and having excellent pore characteristics is obtained without leading to a water-soluble coagulating liquid including a nonsolvent of the amideimide-based polymer or a polyamic acid in the method for producing the porous film comprising the amideimide-based polymer or the imide-based polymer. <P>SOLUTION: The method for producing the porous film comprising the amideimide-based polymer or the imide-based polymer includes a step in which a liquid composition comprising the amideimide-based polymer or the polyamic acid and a solvent that is a good solvent of the amideimide-based polymer or the polyamic acid is applied to one surface of a substrate, cast into a film shape, and then subjected to humidity drying without leading to the water-soluble coagulating liquid including the nonsolvent of the amideimide-based polymer or the polyamic acid, and further the imide-based polymer is obtained through an imidization step when the polyamic acid is used. <P>COPYRIGHT: (C)2012,JPO&INPIT |
