PURPOSE: To obtain the composition excellent in viscosity control and suitable, e.g. for formation of a film for electrolysis, dialysis, a fuel cell, etc., by dissolving a fluorine-containing ion-exchange resin in a specified mixed solvent.
CONSTITUTION: This composition is obtained by dissolving (A) a fluorine- containing ion-exchange resin having, e.g a repeating unit of formula I-(CF2CXX ') {X is F, Cl, H or CF3; X' is X or (CF2)m-CF3 [(m) is 0 or 1]} or another repeating unit of formula II {Y is (P-Q-R) [P is (CF2)a-(CXX')b(CF2)c [(a), (b) and (c) are each 0 to 6]; Q is (CF2OCXX')d [(d) is 0 to 6]; R is (CXX'OCF2)e [(e) is 0 to 6]] or O-(P-Q-R); A is SO3M (M is H or an alkaline metal), COOM, etc.; (n) is 0 or 1} in (B) a mixture solvent composed of an oxygen-containing hydrocarbon such as a 1 to 4C alcohol or a 1 to 4C ether and a fluorine- containing compound such as a (hydro)chlorofluorocarbon or a fluoroether.
ISHIZAKI TOYOAKI
TAMURA MASAYUKI
JITSUKATA KIYOSHIGE
