Patent ID: 9440198
Filing Date: 2016-09-13
CPC Classification: A61M,B01D,C08L

Claim Text:
1. A membrane, comprising: a block copolymer comprising at least one block A comprising structural units having a formula (I), and at least one block B comprising structural units having a formula (II): wherein “a” and “b” are independently at each occurrence 0, 1, 2, 3, or 4; “n”, “p”, “q” and “r” are independently 0 or 1; R1 and R2 are independently at each occurrence a hydrogen atom, a nitro group, a C1-C12 aliphatic radical, a C3-C12 cycloaliphatic radical, or a C3-C12 aromatic radical; R3 is a hydrogen atom, a C1-C12 aliphatic radical, a C3-C12 cycloaliphatic radical, or a C3-C12 aromatic radical; R4 is a C1-C12 aliphatic radical, a C3-C12 cycloaliphatic radical, or a C3-C12 aromatic radical; Y is independently at each occurrence a bond, an oxygen atom, a sulfur atom, a sulfinyl group, a sulfonyl group, a phenylphosphine group, a C1-C12 aliphatic radical, a C3-C12 cycloaliphatic radical, or a C3-C12 aromatic radical; Q is a bond, an oxygen atom, a sulfur atom, a C1-C12 aliphatic radical, a C3-C12 cycloaliphatic radical, or a C3-C12 aromatic radical; and Z is a zwitterion functional group.