COPOLYMER WITH HIGH CHEMICAL HOMOGENEITY AND USE THEREOF FOR IMPROVING COLD FLOW PROPERTIES OF LIQUID FUELS Russian patent published in 2015 - IPC C08F220/12 C08F220/18 C08F210/02 C08F8/14 C10M145/14 C10L10/14 

FIELD: chemistry.

SUBSTANCE: present invention relates to production of a copolymer with high chemical homogeneity and use thereof for improving cold flow properties of liquid fuels. Described is a copolymer with high chemical homogeneity, consisting of (A) 50 to 30 wt % ethylene, (B) 50 to 70 wt % hydrocarby ester of acrylic acid or methacrylic acid with 4-24 carbon atoms in the carbon residue, or a mixture of such hydrocarbyl esters, (C) 0 to 5 wt % acrylic acid and/or methacrylic acid and (D) 0 to 10 wt % of one or more copolymerisable monomers, where all monomer components in the copolymer together add up to 100 wt %, obtainable by polymerising a mixture of 80 to 60 wt % ethylene, 20 to 40 wt % acrylic acid and/or methacrylic acid and 0 to 10 wt % of one or more copolymerisable monomers, where all monomer components in the mixture together add up to 100 wt %, in back-mixing, continuous polymerisation equipment, and subsequent polymer-analogous esterification of the resulting copolymer of ethylene and (meth)acrylic acid or of essentially ethylene and (meth)acrylic acid with a hydrocarbon alcohol with 4-24 carbon atoms or a mixture of hydrocarbon alcohols with 4-24 carbon atoms. Also described is a method of producing said copolymer. The invention also describes liquid fuels containing 10 to 500 ppmw of said copolymer. Also described is the use of said copolymer to improve cold flow properties of fuel oils, to reduce the lower mixing temperature of cold flow enhancing additives with fuel oils and to improve filterability of fuel oils containing cold flow enhancing additives.

EFFECT: obtaining copolymers having high chemical homogeneity, which improve low-temperature properties of liquid fuels.

12 cl, 1 ex