Patent ID: 11876267
Assignee: ASAHI KASEL KABUSHIKI KAISHA
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  C  Y | IPC H

Claim 2:
3. The electrolyte membrane according to claim 2, wherein the perfluorocarbon polymer has a structure represented by the following formula (1):

—[CF2—CX1X2]a—[CF2—CF(—O—(CF2—CF(CF2X3))b—Oc—(CFR1)d—(CFR2)e—(CF2)f—X4)]g—  (1), wherein X1, X2 and X3 are each independently a halogen atom or a perfluoroalkyl group having 1 to 3 carbon atoms; X4 is a —COOZ group, a —SO3Z group, a —PO3Z2 group or a —PO3HZ group; Z is a hydrogen atom, an alkali metal atom, an alkaline earth metal atom, NH4, NH3R11, NH2R11R12, NHR11R12R13, or NR11R12R13R14; R11, R12, R13, and R14 are each independently an alkyl group or an aryl group; R1 and R2 are each independently a halogen atom, a perfluoroalkyl group having 1 to 10 carbon atoms or a fluorochloroalkyl group having 1 to 10 carbon atoms; a and g are numbers satisfying 0≤a<1, 0<g≤1, and a+g=1; b is an integer of 0 to 8; c is 0 or 1; and d, e and f are each independently an integer of 0 to 6 provided that d, e and f are not 0 at the same time.