| 摘要 |
PROBLEM TO BE SOLVED: To provide an imide-based polymer solution from which a porous imide-based polymer film excellent in heat resistance, having high porosity, and scarcely allowing any solvent to remain therein can be obtained, and to provide the porous imide-based polymer film obtained from the solution, and a production method of the film.SOLUTION: <1> An imide-based polymer solution is a solution composed of an imide-based polymer and a mixed solvent of alkyl ureas and glymes, in which the alkyl ureas are good solvents of the imide-based polymer and the glymes are poor solvents of the imide-based polymer. <2> In a production method of a porous imide-based polymer film, the imide-based polymer solution is applied onto a substrate and dried. <3> The porous imide-based polymer film is produced by the method.SELECTED DRAWING: None |
