POLYMER COMPOSITION, MEMBRANE CONTAINING SAID COMPOSITION, METHOD FOR THE PRODUCTION AND USE THEREOF

摘要

A composition containing (A) 30-99.5 wt% sulfonated aromatic polyether-ketone with an ion exchange capacity of 1.3-4.0 meq (-SO 3H)/g polymer and (B) 0.5-70 wt% polybenzimidazole. Independent claims are also included for (a) sulfonated aromatic polyether-ketones of the PEK type with an ion exchange capacity as above; (b) membranes containing this type of PEK or the above composition; (c) a process for the production of these membranes by dissolving a salt of (A) and polymer (B), or the PEK-type polymer, in a suitable solvent, especially dimethyl sulfoxide, N,N-dimethylformamide, N,N-dimethylacetamide or N-methyl-2-pyrrolidone (NMP), and forming a membrane from the solution by known methods such as casting, spreading, spraying or spin-coating.