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AssigneeCuno Incorporated
InventorsEugene A. Ostreicher, Rodney A. Knight, Joseph V. Fiore, George T. Emond, Kenneth C. Hou
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A cationic charge modified microporous membrane comprising a hydrophilic organic polymeric microporous membrane and a cationic charge modifying agent bonded to substantially all of the wetted surfaces of the membrane, the charge modifying agent being an epichlorohydrin modified polyamide having tertiary amine or quaternary ammonium groups. A secondary charge modifying agent may be employed selected from: (i) aliphatic polyamines having at least one primary amine or at least two secondary amines; and (ii) aliphatic amines having at least one secondary amine and a carboxyl or hydroxyl substituent. Processes for producing and using the membrane are also described.
A hydrophilic, cationic charge modified microporous filter membrane comprising:
A cationic charge modified microporous filter membrane comprising a substantially isotropic, hydrophilic, nylon film membrane having micropores throughout the membrane, the surfaces of the micropores being modified by a charge modifying agent, said charge modifying agent being a polyamido-polyamine epichlorohydrin resin having tertiary amine or quaternary ammonium groups.
A cationic charge modified filter membrane comprising a substantially isotropic, hydrophilic, nylon film having micropores therethrough, the surfaces of the micropores being modified by a charge modifying agent, said charge modifying agent being a resin which is the reaction product of diallylnitrogen-containing material with epichlorohydrin having tertiary amine or quaternary ammonium groups.
Dependencies are inferred from the claim text.