Asymmetric semi-permeable membranes from aromatic polycondensators and process for manufacturing thereof

摘要

For haemodialysis, haemodiafiltration, haemofiltration, ultrafiltration, microfiltration and reverse osmosis, asymmetrical semipermeable membranes are suitable which comprise aromatic polycondensates containing recurring units of the formula… (-O-Z-O-Y-)n (I in which … …  Y is the divalent radical of an aromatic sulphone or of an aromatic ketone, and …  -O-Z-O- is a divalent diphenoxide radical in which 0.1-100 mol% of all the diphenoxide radicals are those of the formula …IMAGE… … where the substituents and indices are as defined in the description.