Patent ID: 6994788
Filing Date: 2006-02-07
Classification: C08J,H01M,Y02E,Y02P,Y10S

Abstract:
1. A sulfonated aromatic polyetherketone polymer a comprising the repeating structural unit of the formula (I) in which Ar 1 and Ar 2 are, 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 or sulfonic acid groups, R is hydrogen, an alkali metal or alkaline earth metal ion or an ammonium ion, n is an integer from 1 to 3, m is 1 or 2 and X is a —CO—, —O—, —C p H 2p —, —C p F 2p — or —S— group, in which p is an integer from 1 to 10 and which has an ion exchange capacity of between 0.5 and 3.0 meq (—SO 3 H)/g of polymer.