Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
December 11, 2007
Patent Application Number
10828521
Date Filed
April 6, 2004
Patent Primary Examiner
Patent abstract
A block copolymer composition AB is provided that has pendent groups —RZ extending from the A copolymer on at least 70 mol % of the A monomers, where R and Z are each an ionic species. The composition is included in a semipermeable membrane for use in a direct methanol fuel cell. Also described are articles of protective apparel comprising the composition which advantageously has barrier properties as well as superior water vapor transport properties.
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