C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
402/250, 402/340
C08F 8/00 (2006.01) C08F 222/20 (2006.01)
Patent
CA 1048200
Method for preparation of cation exchangers by substitution of hydrophilic polymeric gels. ABSTRACT OF THE DISCLOSURE The invention relates to a method for preparation of hydrophilic cation exchangers by a chemical modification of crosslinked copolymeric gels containing reactive hydroxyl groups and based on hydroxyalkyl, oligogylcol or polyglycol acrylates and methacrylates and hydroxyalkylacrylamides or hydroxyalkylmethacrylamides. The modification is carried out in reactions of hydroxyl groups with halogenalkane acids and their derivatives, anhydrides and halides of dicarboxy- lic acids or carbodiimides. If the modification agent contains several reactive groups, the remaining functional groups after modification may be allowed to react with dicarboxylic, polycarboxylic, hydroxycarboxylic or amino- carboxylic acids, or phosphoric or sulfuric acid, halogene- epoxides, diepoxydes or polyepoxides. The hydroxyl groups can be also modified by oxidation to carboxylic groups by common oxidants. The gels used for modification may also contain alkoxido reactive groups and they have generally the homogeneous, semiheterogeneous or macroporous character. The ion-exchanging gels prepared in this way are suitable for sorption and chromotographic separations, especially for separation of sensitive biological materials. - 1 -
219479
Coupek Jiri
Mikes Otakar
Strop Petr
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