FIELD: extraction chromatography and hydrometallurgy. SUBSTANCE: at first stage alpha-oxides are subjected to cationic polymerization in anhydrous organic solvent in inert atmosphere in the presence of catalyst. At second stage mixture of styrene and divinyl benzene is added to polymerization products in the presence of radical polymerization catalyst, and copolymerization is once again carried out as starch is dispersed in aqueous solution. Alpha-oxides include epichlorin, glycidol alcohol nitrate, propylene oxide or oxide of other alpha- alkylenes. EFFECT: more efficient preparation method. 1 tbl
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