Process for producing anion permselective membranes

Claim 1

A PROCESS FOR THE PRODUCTION OF ANION PERMSELECTIVE MEMBRANES WHICH INCLUDE AN INSOLUBLE, INFUSIBLE SYNTHETIC SOLID ORGANIC COPOLYMER, A REINFORCING MATERIAL SUPPORTING THE SAID COPOLYMER, AND ANION-EXCHANGE GROUPS COMBINED CHEMICALLY WITH THE SAID SOLID COPOLYMER, COMPRISING IMPREGNATING A LATEX OF LINEAR COPOLYMER OF A MONOVINYL AROMATIC HYDROCARBON AND A CONJUGATED ALIPHATIC POLYENE COMPOUND INTO A REINFORCING MATERIAL HAVNG 45 TO 70% OF APPARENT FREE SPACE, THE BONDED MONOVINYL AROMATIC HYDROCARBON BEING 35 TO 75% OF THE COPOLYMER, DRYING THE REINFORCING MATERIAL IMPREGNATED WITH LATEX THEREBY TO FORM A MEMBRANE OF LINEAR COPOLYMER SUPPORTED BY THE REINFORCING MATERIAL, THEREAFTER CONTACTING THE SAID MEMBRANE WITH THE FRIEDEL-CRAFTS REAGENT TO CONVERT THE SAID LINEAR COPOLYMER INTO AN INSOLUBLE, INFUSIBLE THREE-DIMENSIONAL NETWORK STRUCTURE, AND CONTACTING THE THUS-OBTAINED MEMBRANE COMPOSED OF INSOLUBLE, INFUSIBLE COPOLYMER AND REINFORCING MATERIAL WITH A CHLOROALKYL ETHER FOLLOWED BY AMINATION WITH AMINES.