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AssigneeAGC Inc.
InventorsTakeshi Hirai, Susumu Saito, Hiroyuki Watabe, Chikaya Tamitsuji, Daisuke Jomuta
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An acid-type sulfonic acid group-containing polymer containing perfluoromonomer units, no monomer units having a halogen atom other than a fluorine atom, and acid type sulfonic acid groups, whose hydrogen gas permeability coefficient under the conditions of a temperature of 80° C. and a relative humidity of 10% is at most 2.5×10−9 cm3·cm/(s·cm2·cmHg), and whose mass reduction rate when immersed in hot water at 120° C. for 24 hours is at most 15 mass %. Liquid composition, membrane electrode assembly, polymer electrolyte fuel cell, and ion exchange membrane utilizing the acid-type sulfonic acid group-containing polymer.
An acid-type sulfonic acid group-containing polymer comprising perfluoromonomer units, no monomer units having a halogen atom other than a fluorine atom, and acid type sulfonic acid groups, said polymer having a hydrogen gas permeability coefficient under conditions of a temperature of 80° C. and a relative humidity of 10%, of at most 2.5×10−9 cm3·cm/(s·cm2·cmHg) and a mass reduction rate when immersed in hot water at 120° C. for 24 hours of at most 15 mass %,
An acid-type sulfonic acid group-containing polymer comprising units represented by the following formula u1, said polymer having a mass reduction rate when immersed in hot water at 120° C. for 24 hours of at most 15 mass %:
Dependencies are inferred from the claim text.