| abstract |
PURPOSE: To facilitate production of spherical insolubilized crosslinked resin suitable as a strongly basic anion exchange resin, by suspending an aqueous polyvinylamine solution in a water-insoluble dispersing medium and reacting it with a polyfunctional crosslinking agent. n CONSTITUTION: An aqueous solution is prepared by dissolving a polyvinylamine (weight-average MW of about 1,000W500,000 and an amino group content ≥about 50mol%), represented by the formula (wherein R is H or methyl). This solution is dispersed in a water-insoluble dispersing medium (e.g., carbon tetrachloride or dichloroethylene) in which about 0.05W0.5mol, per mol of the amino groups of the polyvinylamine, of a polyfunctional crosslinking agent which can combine with an alkyl group-substituted prim. amino group (e.g., dimettylene dibromide or p-xylylene dichloride) is dissolved, and the resulting dispersion is reacted at room temperature to about 100°C for 5W40hr to form spherical crosslinked polyvinylamine particles. n COPYRIGHT: (C)1986,JPO&Japio |