Patent ID: 8646616

Claim:
A composite membrane comprising a microporous support, a thin film polyamide layer and a coating located upon a surface portion of the thin film polyamide layer, wherein the coating comprises a polymer comprising alkylene oxide repeating units and at least one imidazol functional group represented by Formula (III): wherein the dotted line represents an optional double bond between the no. 4 and 5 ring positions; R 4 is selected from hydrogen and alkyl; and R 5 and R 6 collectively form an alicyclic or aryl group, or are independently selected from: hydrogen, hydroxyl, halogen, aliphatic, aryl, acyl, alkoxy, aryl-oxy, sulfone, sulfoxide and amine; and Y is selected from amine, alkyl, alkoxy, alkylthio, aryl, aryl-oxy, aryl-thio, hydroxyl, and halogen.