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Sergei Borisovich Savvin

Serafima Borisovna Makarova

Roman Yakovlevich Mushy

Vera Ivanovna Seraya

Alla Lvovna Bratslavskaya

Galina Vladimirovna Myasoedova

In accordance with the present invention, a copolymerization product of N-vinylmethylpyrazole with a divinyl cross-linking agent has the following formula of its elemental unit: ##STR1## wherein R is CH.sub.3 in the position 3 or 5; A is a divinyl cross-linking agent, viz. divinylbenzene, diallylmaleate, ethyleneglycol dimethacrylate, diethyleneglycol dimethacrylate, triethyleneglycol dimethyacrylate; it has a sorption capacity with respect to the platinum group metals and silver: E.sub.Au = 420 to 785 mg/g of the sorbent E.sub.Ag = 320 to 450 mg/g of th sorgent, E.sub.Pd = 130 to 170 mg/g of th sorbent, E.sub.Pt = 180 to 230 mg/g of the sorbent and a swelling factor in water of 2 to 4 ml/g. The method for preparing said copolymerization product of N-vinyl methylpyrazole with a divinyl cross-linking agent according to the present invention comprises reacting N-vinylmethylpyrazole of the formula: ##STR2## wherein R is CH.sub.3 in the position 3 or 5, with a divinyl cross-linking agent, viz. divinylbenzene, diallylmaleate, ethylenglycol dimethacrylate, di ethyleneglycol dimethacrylate, triethyleneglycol dimethacrylate in the pesence of a radicaltype initiator at 70.degree.-100.degree. C in a suspension medium, followed by isolation of the desired product.

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Moscow, Russia

Sergei Borisovich Savvin