SUPERHIGH-MOLECULAR WEIGHT POLYOLEFIN USED AS ADDITIVE IMPROVING FLOWABILITY OF COLD LIQUIDS

摘要

FIELD: polymer production.;SUBSTANCE: invention relates to superhigh-molecular weight copolymer constituted by an α-olefin monomer with carbon chain length 4 to 9 carbon atoms and another comonomer, which is α-olefin with carbon chain length 2 to 20 carbon atoms or containing vinylaromatic monomer. Copolymer has molecular mass above 1000000 and no more than 25 mol % monomers with carbon chain length 12 carbon atoms or more. Copolymer of invention is completely dissoluble in heavy aromatic hydrocarbons at low temperatures such as 0°C. Another advantage of the copolymer consists in that it can be transported either in stable suspension or can be preliminarily dissolved in small amount of heavy hydrocarbon. Suspension of polymer lowering resistance of a medium is stable so allowing longer storage time and thereby enabling agreement between consumer's demand and delivery time. Secondary agglomeration of polymers leading to lower resistance of medium is considerably reduced ensuring easier processing in the production process.;EFFECT: facilitated flowability control.;14 cl, 1 dwg, 2 tbl, 4 ex