Exxon Chemical Patents, Inc.

Infineum International Limited

Exxon Research & Engineering

Ramah Jessica Brod

Brian William Davies

Tuncel Ibrahim

Jan Bock

Robert L Elliott

Dennis G Peiffer

Kenneth Lewtas

Robert Dryden Tack

Jean P Coquerel

Panagiotis Dounis

George R Chludzinski

Compositions comprising (a) an ethylene-mixed unsaturated ester copolymer or (b) two or more ethylene-unsaturated ester copolymers differing, for example, in their ester chains improve the low temperature properties of fuel oils.

Oil additives and compositions

A macromolecular cold flow improver in which a crystalline moiety and an oil-solubility enhancing moiety are linked by a functional group.

Macromolecular materials

Compositions comprising an ethylene/vinyl acetate or propionate/vinyl branched carboxylate terpolymer improve the low temperature properties of fuel oils.

Oil additives compositions and polymers for use therein

Oil additives, compositions and polymers for use therein

The reaction cycle time for the copolymerization of unsaturated esters such as alkyl fumarates and vinyl acetate, and for the polymerization of methacrylates and acrylates may be dramatically reduced by carrying out the polymerization at elevated temperatures and pressures. An additional feature is the addition of initiator during polymerization which leads to improved products especially for lubricating oil pour depressants and fuel and crude oil flow improvers.

Copolymerisation of unsaturated esters

The invention concerns a lubricating oil containing less than 3 wt. % of a mixture of (1) a lubricating oil pour depressant and (2) a polyoxyalkylene ester, ether, ester/ether or mixture thereof containing one or more C.sub.10 to C.sub.30 alkyl groups and polyoxyalkylene glycol group of molecular weight 100 to 5000, the alkylene group of said polyoxyalkylene glycol containing from 1 to 4 carbon atoms. The pour depressant can for example be a vinyl acetate copolymer, a polyalkylacrylate, a polyalkylmethacrylate or an esterified olefin/maleic anhydride copolymer.

Lubricating oil composition

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Abingdon, United Kingdom

Ramah Jessica Brod