Patent ID: 7648034
Filing Date: 2010-01-19
Classification: B01D,Y10T

Abstract:
1. A clean, caustic resistant, porous membrane comprising a microporous membrane substrate and a heat stable biomolecule resistant surface, wherein said heat stable biomolecule resistant surface is a separately formed surface coating which comprises a crosslinked terpolymer, said terpolymer comprising at least two monofunctional monomers selected from the group consisting of acrylamides, methacrylamides, and N-vinyl pyrrolidones, and at least one polyfunctional monomer selected from the group consisting of polyfunctional acrylamides, polyfunctional methacrylamides, and diacroylpiperazines; wherein said surface coating is formed in situ on said membrane substrate by a method comprising exposing said monomers to heat, ultraviolet light or electron beam; provided that when said monofunctional monomer comprises an acrylamide that comprises diacetone acrylamide, said diacetone acrylamide is present in an amount of no more than 37.5% by weight of said surface.