Bromine, chlorine or iodine functional polymer electrolytes...

Details Bromine, chlorine or iodine functional polymer electrolytes... Bromine, chlorine or iodine functional polymer electrolytes...

2007-09-04

2007-09-04

McClendon, Sanza L. (Department: 1711)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Compositions to be polymerized by wave energy wherein said...

C522S150000, C522S155000, C522S184000, C522S185000, C522S186000, C522S187000, C522S189000, C522S109000, C522S110000, C522S111000, C522S112000

Reexamination Certificate

active

10712590

ABSTRACT:
A method is provided for making a crosslinked polymer electrolyte, typically in the form of a membrane for use as a polymer electrolyte membrane in an electrolytic cell such as a fuel cell, as well as the polymer so made, the method comprising application of electron beam radiation to a highly fluorinated fluoropolymer comprising: a backbone derived in part from tetrafluoro-ethylene monomer, first pendent groups which include a group according to the formula —SO2X, where X is F, Cl, Br, OH or —O−M+, where M+is a monovalent cation, and second pendent groups which include Br, Cl or I. Typically, the membrane has a thickness of 90 microns or less, more typically 60 or less, and most typically 30 microns or less.

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