PROCESS FOR PREPARING IMPROVED WEAK ACID RESINS AND POROUS WEAK ACID RESINS

Weak acid type cation exchange resins are prepared by subjecting to caustic hydrolysis a copolymer comprising in polymerized form (1) a major amount of a monoethylenically unsaturated monomer which is hydrolyzable under caustic conditions; (2) a minor amount of a monoethylenically unsaturated monome...

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Bibliographische Detailangaben
1. Verfasser:	CHONDE, YOHANNES
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR PREPARATION OR CHEMICAL WORKING-UP THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	Weak acid type cation exchange resins are prepared by subjecting to caustic hydrolysis a copolymer comprising in polymerized form (1) a major amount of a monoethylenically unsaturated monomer which is hydrolyzable under caustic conditions; (2) a minor amount of a monoethylenically unsaturated monomer which has a less hydrolyzable character than the hydrolyzable monomer, and (3) an effective amount of a crosslinking monomer. For example, copolymers prepared from methyl acrylate, butyl acrylate and divinylbenzene. The resin beads so prepared exhibit increased resistance to osmotic shock.