FIELD: oil industry.
SUBSTANCE: invention relates to compositions used as additives lowering a freezing point for oil-based liquids. A composition of an additive lowering a freezing point is proposed, containing: copolymer C16-C30 of alpha olefin monomer and maleic anhydride monomer, converted into composite ester or imide and present in the amount from 1 to 30 percent by weight of the total weight of the composition; and (i) 1) nonionic surfactant containing 2-propylheptanolalkoxylate, where alkoxylate has the formula C5H11CH(C3H7)CH2O(A)nH, where A is an alkylenoxy group containing 2-4 carbon atoms, and n is 2-16, present in the amount from 1 to 40 percent by weight of the total weight of the composition, 2) cationic surfactant containing alkoxylated amine, present in the amount from 1 to 40 percent by weight of the total weight of the composition, and 3) at least two hydrocarbon solvents present in the amount from 50 to 95 percent by weight of the total weight of the composition; or (ii) 1) anionic surfactant containing amine salt and alkylbenzenesulfonic acid, where amine salt contains amine with 2-30 carbon atoms, and alkylbenzenesulfonic acid includes a straight-chain or branched alkylbenzenesulfonate salt, in which an alkyl group contains from 9 to 18 carbon atoms, present in the amount from 1 to 50 percent by weight of the total weight of the composition, 2 ) copolymer of ethylene vinyl acetate, and 3) a hydrocarbon solvent. Additive compositions lowering a freezing point are also disclosed.
EFFECT: obtaining additive compositions lowering a freezing point of oil-based liquids.
11 cl, 6 tbl
