Patent ID: 7977451

Claim:
A membrane for hemodialysis and hemofiltration having a pore size between about 0.5 nm and 100 nm comprising a polyarylethernitrile having a contact angle with water of less than about 50° measured on a surface of the copolymer cast as a film on a glass substrate and having structural units of formula 1, 2, 3 and 4 wherein Z is a direct bond, O, S, SO, SO 2 , CO, RPO, alkenyl, alkynyl, a C 1 -C 12 aliphatic radical, a C 3 -C 12 cycloaliphatic radical, a C 3 -C 12 aromatic radical or a combination thereof; R is a C 6-12 aromatic radical or a C 1-12 aliphatic radical; R 1 and R 2 are independently H, halo, nitro, a C 1 -C 12 aliphatic radical, a C 3 -C 12 cycloaliphatic radical, a C 3 -C 12 aromatic radical, or a combination thereof; a is 0, 1, 2 or 3; b is 0, 1, 2, 3 or 4; m and n are independently 0 or 1; Q and Z are different; R 3 , R 4 and R 5 are independently H, halo, nitro, a C 1 -C 12 aliphatic radical, a C 3 -C 12 cycloaliphatic radical, a C 3 -C 12 aromatic radical or a combination thereof; Q is a direct bond, O, S, alkenyl, alkynyl, a C 1 -C 12 aliphatic radical, a C 3 -C 12 cycloaliphatic radical, a C 3 -C 12 aromatic radical or a combination thereof; Z 1 is a direct bond, O, S, CH 2 , SO, SO 2 , CO, RPO or a combination thereof; c, d and e are independently 0, 1, 2, 3 or 4; p, q and r are independently 0 or 1; and said polyarylethernitrile has a benzonitrile content of between about 20 and 35 mol %; and the remaining between about 65 and 80 mol % of said polyarylethernitrile is made up of Bisphenol-A and Bisphenol-S residues.