| 摘要 |
PROBLEM TO BE SOLVED: To provide a varnish for porous film production that gives an unburned composite film with less cissing, a method for producing a porous film using the same, and a polyamide-imide porous film that can be thinned.SOLUTION: A varnish for porous film production comprises at least one resin (A) selected from the group consisting of polyamide acid, polyimide, polyamide-imide precursor and polyamide-imide, fine particles (B), and a silicon atom- and/or fluorine atom-containing surfactant (C) having an alkylene oxide chain.SELECTED DRAWING: None |
