FIELD: chemical technology. SUBSTANCE: hydrocarbon composition has paraffin oily fraction and 0.1-10000 mg per 1 kg oily fraction of polymeric addition agent. Addition agent: a mixture of 1-90 wt.-% as an addition agent of linear polymer of carbon monoxide with one or more olefins containing at least 10 carbon atoms in molecule where elemental carbon monoxide and olefin links were alternated with polymer of at least a single n-alkylacrylate and a mixture of n-alkylmethacrylate containing 8-30 carbon atoms in alkyl. EFFECT: improved method of composition preparing. 4 cl, 2 tbl
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