IONENAUSTAUSCHCHERHARZPERLEN UND VERFAHREN ZU DEREN HERSTELLUNG

The ion exchange resin beads have functional groups of formula I wherein R , R , R , R , m, r and q have the meanings stated in Claim 1 and which have a matrix of a cross-linked polymer wherein the level of cross-linkages is decreased in the shell area as compared to the core area. These ion exchang...

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Bibliographic Details
Main Authors EIFFLER, JURGEN, MOON, NICHOLAS
Format Patent
LanguageEnglish
German
Published 15.04.1993
Edition5
Subjects
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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Summary:The ion exchange resin beads have functional groups of formula I wherein R , R , R , R , m, r and q have the meanings stated in Claim 1 and which have a matrix of a cross-linked polymer wherein the level of cross-linkages is decreased in the shell area as compared to the core area. These ion exchange resin beads are prepared by reacting resin beads which have primary or secondary amino groups and the mentioned matrix of a cross-linked polymer with a1) a hypophosphite salt in the presence of an acid, or a2) a hypophosphorous acid and b) formaldehyde or a formaldehyde releasing compound.
Bibliography:Application Number: AT19890307211T