The present invention concerns the field of polymer chemistry and relates to water-insoluble anion exchange materials as they are used, for example, for anion exchange membranes or as anion exchange resins.

The object of the invention is the specification of water-insoluble anion exchange materials which exhibit improved insolubility in water.

The object is attained by water-insoluble anion exchange materials, at least composed of linearly polymerized and/or branched and/or crosslinked anion exchange groups C, which are part of the structural units according to at least one of the general formulas I to VIII.

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Provided is means capable of reducing the adsorptivity to plastics while suppressing a decrease in intracellular uptake efficiency in an amphiphilic compound that can be applied to long-term blood-retaining liposomes or the like as a drug carrier. The above problem can be solved by an amphiphilic compound comprising a moiety (I) including a constitutional unit (A) derived from a monomer (a) having two or more hydroxyl groups and having 2 to 10 carbon atoms constituting the side chain among the carbon atoms of the constitutional unit, and a hydrocarbon group having 8 or more carbon atoms.

Water-insoluble anion exchange materials which exhibit improved insolubility in water are used, for example, for anion exchange membranes or as anion exchange resins. The water-insoluble anion exchange materials are at least composed of linearly polymerized and/or branched and/or crosslinked anion exchange groups C, which are part of the structural units according to at least one of the general formulas I to VIII: ##STR00001## ##STR00002##

Disclosed are novel polymers that are grafted onto a substrate. These polymers contain monomer units derived from 4-vinylpyridine and monomer units derived from a co-monomer. The polymers may be complexed with a metal, and linear or crosslinked. Also disclosed are methods for preparing these polymers by radical polymerisation, as well as to their use for metal capture in aqueous media, particularly uranium capture in seawater or in final nuclear waste from nuclear power plants.