FIELD: oil refining and petrochemistry.
SUBSTANCE: method for producing a depressant-dispersant additive for oil and diesel fuel is proposed, characterized by the fact that styrene, alkyl (meth) acrylate and vinyl acetate are terpolymerized in one stage in an aromatic solvent medium at a monomer ratio of styrene: alkyl (meth) acrylate: vinyl acetate, % by weight, 50-35:45-30:35-15, their total content is 50-70% by weight, with the addition of a polymerization initiator at the rate of 5 wt. % by weight of monomers, at a temperature of 85 to 95°C for 10-12 hours. A depressant-dispersant additive is also proposed.
EFFECT: obtaining a depressant-dispersant additive in a single-stage method, which improves low-temperature properties and sedimentation stability during cold storage of oil and diesel fuel.
2 cl, 1 dwg, 3 ex
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