FIELD: organic chemistry. SUBSTANCE: method involves polymerization of cationic water-soluble monomer with double bond or its copolymerization with nonionic monomer with double bond in the presence of branching agent at concentration 4-80 mol. p. per million as measured for parental monomer content with double bond. Polymerization is carried out in the presence of kinetic chain carrier taken at concentration providing solubility coefficient of the prepared copolymer above 30% EFFECT: improved method of flocculant preparing. 3 cl, 7 tbl
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