Patent ID: 6193077
Filing Date: 2001-02-27
Classification: B01D

Abstract:
A non-cracking polyethersulfone microporous membrane having a permanent hydrophilic coating wherein the coating is prepared by (a) directly coating the entire surface of a hydro-phobic polyethersulfone membrane having an average pore size in the range of between about 0.1 and 100 micrometers with an aqueous solution of a polyalkylene oxide polymer and at least one polyfunctional monomer, and (b) plasma polymerizing the monomer over the entire surface of the microporous membrane under conditions which cause the resulting polymer to become attached both to the polyethersulfone microporous membrane and to the polyalkylene oxide polymer to form a non-extractable surface which does not crack when the microporous membrane is folded for use as a pleated cartridge filter.