Method for producing polyimide film
AssigneeKaneka Corporation
InventorKatsunori Yabuta
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Abstract
A method for producing a polyimide film comprises the steps of: preparing a polar organic solvent solution of a polyimide precursor obtained by mixing a tetracarboxylic acid dianhydride compound and a diamine compound; adding a dehydrating agent and an imidization catalyst to the polar organic solvent solution so as to prepare a resin solution composition; and drying the resin solution composition by heating so as to imidize the resin solution composition after flowing the resin solution composition onto a support in a casting manner, wherein diethyl pyridine is used as the imidization catalyst. According to the production method, it is possible to obtain a polyimide film which is highly productive and is excellent in the film quality such as the mechanical property, the adhesive strength, and the like.
Claims5
A method for producing a polyimide film, comprising the steps of:
- preparing a polar organic solvent solution of a polyimide precursor obtained by mixing a tetracarboxylic acid dianhydride compound and a diamine compound;
- adding a dehydrating agent and an imidization catalyst comprising 3,5-diethyl pyridine to the polar organic solvent solution so as to prepare a resin solution composition;
- and
- drying the resin solution composition by heating so as to imidize the resin solution composition after flowing the resin solution composition onto a support in a casting manner,
- wherein the polyimide precursor includes pyromellitic acid dianhydride and 4,4′-diaminodiphenyl ether.
Dependencies are inferred from the claim text.