Membranes containing sulfonated polyetherketone and another...

Details Membranes containing sulfonated polyetherketone and another... Membranes containing sulfonated polyetherketone and another...

2005-07-05

2005-07-05

Lipman, Bernard (Department: 1713)

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

Synthetic resins

Ion-exchange polymer or process of preparing

C521S033000, C528S125000, C528S373000, C528S391000

Reexamination Certificate

active

06914084

ABSTRACT:
Membranes comprising sulfonated polyether ketone and another polymer, process for their production, and their use, Membranes comprising from 30 to 99.5% by weight of a sulfonated, strictly alternating polyether ketone (A) having repeat units of the formula (I) —Ar—O—Ar′—CO—, where Ar and Ar′, independently of one another, are bivalent aromatic radicals, with an ion exchange capacity of from 1.3 to 4.0 meq of —SO3H/g of polymer and from 0.5 to 70% by weight of a partially fluorinated, nonfluorinated or perfluorinated polymer (B) are described. The membranes may be used in fuel cells.

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