Anion-exchange resins

Claim 1

A PROCESS FOR THE PREPARATION OF ANIONEXCHANGE RESINS WHICH COMPRISES FIRS FORMING A PROLIFEROUS COPOLYMER OF METHYL VINYL KETONE CONTAINING FROM 70% TO 98% METHYL VINYL KETONE BY PROLIFEROUSLY POLYMERIZING, AT A TEMPERATURE FROM 50* C. TO 80* C. IN THE SUBSTANTIALLY COMPLETE ABSENCE OF OXYGEN, A MIXTURE OF METHYL VINYL KETON AND AN AUXILIARY, POLYOLEFINIC COMPOUND WHICH IS COPOLYMERIZABLE WITH METHYL VINYL KETON AND IN WHICH THE OLEFINIC LINKAGES ARE IN THE ACYCLIC PORTION OF THE MOLECULE AND ARE THE SOLE FUNCTIONAL GROUPS WHICH TAKE PART IN THE COPOLYMERIZATION REACTION; CONVERTING AT LEAST 15% OF THE KETO-OXYGEN ATOMS OF SAID COPOLYMER OF METHYL VINYL KETONE INTO FORMAMIDO GROUPS BY REACTING SAID COPOLYMER WITH A REAGENT FROM THE CLASS CONSISTING OF AMMONIUM FORMATE, FORMAMIDE, AND MIXTURES OF FORMIC ACID AND A PRIMARY AMINE WHICH CONTAINS ONLY CARBON, HYDROGEN, AND NITROGEN AND IN WHICH THE SOLE FUNCIONAL GROUPS ARE AMINO GROUPS, AT A TEMPERATURE FROM 150* C. TO THE BOILING POINT OF THE REACTION MIXTURE; THEN CONVERTING SAID FORMAMIDEO GROUPS IN THE RESULTANT COPOLYMER TO AMINO GROUPS IN THE HYDROLYZING THE COPOLYMER CONTAINING FORMAMIDO GROUPS BY MEANS OF AN AQUEOUS SOLUTION OF A STRONG MINERAL ACID; AND THEREAFTER ISOLATING THE RESULTANT, ANION-EXCHANGE RESIN.