MACROPOROUS, ASYMMETRIC, HYDROPHILIC POLYARAMIDE MEMBRANES

摘要

A macroporous, asymmetric, hydrophilic membrane containing polyaramid is described. The characterizing features are that it contains a copolyamide which has at least the following recurring structural units: (A) -OC-Ar-CO- (B) -NH-Ar'-NH (C) (D) where Ar and Ar' denote divalent aromatic radicals in which the valence bonds are in the para or comparable coaxial or parallel position, R denotes a lower alkyl radical or a lower alkoxy radical, in each case having up to 4 carbon atoms, or a halogen radical, and R' denotes an unsubstituted or substituted methylene radical or an - O - Ar - Ogroup where Ar has the same structure as given above.