Sulfonated aromatic polymers, membrane containing said...

Details Sulfonated aromatic polymers, membrane containing said... Sulfonated aromatic polymers, membrane containing said...

2006-02-07

2006-02-07

Walker, W. L. (Department: 1723)

Liquid purification or separation

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Material

C210S500280, C210S500330, C210S500370, C210S500400, C210S500410, C525S534000, C525S535000, C525S471000, C525S906000, C429S010000, C526S293000

Reexamination Certificate

active

06994788

ABSTRACT:
A sulfonated aromatic polymer comprising the repeating structural unit of the formula Iin-line-formulae description="In-line Formulae" end="lead"?—O—Ar1(SO3R)n—C(CF3)2—Ar1(SO3R)n—O—Ar2—(X—Ar2)m—,   (I)in-line-formulae description="In-line Formulae" end="tail"?in which Ar1and Ar2are, independently of one another, divalent aromatic or heteroaromatic radicals which are optionally substituted by one or more monovalent organic groups which are inert under the conditions of use, R is hydrogen, an alkali metal or alkaline earth metal ion or an ammonium ion, n is an integer from 0 to 3, m is 0, 1 or 2 and X is a —CO—, —O—, —CpH2p—, —CpF2p— or —S— group, in which p is an integer from 1 to 10, is described.Membranes with high proton conductivities can be produced from this polymer and are preferably used in fuel cells.

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