Charge modified microporous membrane, process for charge modifyi

Details Charge modified microporous membrane, process for charge modifyi Charge modified microporous membrane, process for charge modifyi

1981-10-23

1984-09-25

Sadowski, David R.

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210650, B01D 1300

Patent

active

044734743

ABSTRACT:
A cationic charge modified microporous membrane, process for producing said membrane and use thereof are provided. The membrane comprises a hydrophilic organic polymeric microporous membrane and a charge modifying amount of a primary cationic charge modifying agent bonded to substantially all of the wetted surfaces of the membrane. The primary charge modifying agent if a water soluble organic polymer having a molecular weight greater than about 1000 wherein each monomer thereof has at least one epoxide group capable of bonding to the surface of the membrane and at least one tertiary amine or quaternary ammonium group. Preferably, a portion of the epoxy groups on the organic polymer are bonded to a secondary charge modifying agent selected from the group consisting of:

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