FIELD: chemical industry, in particular, concentrate for lubricating oils. SUBSTANCE: copolymer of general formula 
, where RI, RII, R1÷R6 is H; C1-C3 is alkyl; A is -CH2-CH2- or -CH(CH3)CH2-; Ra is linear or branched C8-C30 alkyl; n is 0 or 1, at least, two radicals from the group consisting of R1, R4, R6, R3 are C1-C3-alkyls; X is 80-98 wt.-%; y is 2-20 wt.-%. EFFECT: improved properties of composition. 4 cl
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