Fluorinated polyimide resin, method for producing the same, fluorinated polyimide electrolytic film, its solution and fuel cell

摘要: PROBLEM TO BE SOLVED: To obtain a new polyimide resin having greatly improved water resistance of solid polymer electrolyte useful in fuel cell, etc. SOLUTION: The fluorinated has basic skeleton represented by formula (1) [Ar 4 is selected from bifunctional substituent groups which contain aromatic rings and at least part hydrogen atoms substituted with sulfonic acid group; Ar 5 trifluoromethyl 6 contains rings; n m are each independently ≥2; p ≥0]. COPYRIGHT: (C)2004,JPO&NCIPI