Oil additives compositions and polymers for use therein
AssigneeExxon Chemical Patents Inc.
InventorsBrian William Davies, Ramah Jessica Brod, Jan Bock, Tuncel Ibrahim
Life of this patent
Estimating the term…
Abstract
Compositions comprising an ethylene/vinyl acetate or propionate/vinyl branched carboxylate terpolymer improve the low temperature properties of fuel oils.
Claims11
An oil composition comprising an oil having a wax content of at most 3% measured at 10° C. below cloud point, and an 0.005 to 0.2 wt. % of oil-soluble ethylene terpolymer containing, in addition to units derived from ethylene, units of the formula:
- and units of the formula
- wherein R1 and R2 each represent H, R3 represents methyl;
- and R4 represents a branched chain alkyl group having from 8 to 15 carbon atoms, other than a tertiary alkyl group, or a branched chain alkyl group having at most 7 carbon atoms, the degree of branching of the terpolymer, as measured by proton NMR spectroscopy, being less than 6 CH3 groups per 100 CH2 units.
A method of improving the low temperature flow properties of an oil having a wax content of at most 3% measured at 10° C. below cloud point, the method comprising adding to said oil 0.005 to 0.2 wt. % of an oil-soluble ethylene terpolymer containing, in addition to units derived from ethylene, units of the formula:
- and units of the formula
- wherein R1 and R2 each represent H;
- R3 represents methyl;
- and R4 represents a branched chain alkyl group having from 8 to 15 carbon atoms, other than a tertiary alkyl group, or a branched chain alkyl group having at most 7 carbon atoms, the degree of branching of the terpolymer, as measured by proton NMR spectroscopy, being less than 6 CH3 groups per 100 CH2 units.
Dependencies are inferred from the claim text.