Back to results
US 2021/0147760 A1Published application
Lubricating composition for and method of lubricating an internal combustion engine
AssigneeThe Lubrizol Corporation
InventorsPaul R. Vincent, Timothy R. Smith, Eugene Pashkovski, Reid A. Patterson
Life of this patent
Estimating the term…
Abstract
The invention provides a lubricating composition comprising a low viscosity base oil and a synergistic mixture of a functionalized ethylene-α-olefin copolymer, a poly(meth)acrylate polymer, and a metal-free anti-wear agent. The invention also provides a method of lubricating an internal combustion engine using such a lubricating composition.
Claims43
A lubricating composition comprising
- (a) a base oil having a kinematic viscosity (ASTM D445 test method) measured at 100° C. of 2.0 mm2/s to 5.0 mm2/s;
- (b) 0.08 weight percent to 5 weight percent of a ethylene-α-olefin copolymer, wherein the ethylene-α-olefin copolymer is grafted with a polar moiety;
- (c) 0.3 weight percent to 5 weight percent of a poly(meth)acrylate polymer;
- and
- (d) 0.05 weight percent to 5 weight percent of a metal-free anti-wear agent;
- wherein the dynamic viscosity measured according to ASTM D4683 of the lubricating composition under shear at 150° C. is 1.4 mPa·s to 2.8 mPa·s.
3 more elements
A lubricating composition comprising
- (a) a base oil having a kinematic viscosity measured at 100° C. of 2.0 mm2/s to 5.0 mm2/s;
- (b) 0.05 weight percent to 2 weight percent of an amine-functionalized ethylene-alpha olefin copolymer;
- (c) 0.3 weight percent to 5 weight percent of a poly(meth)acrylate polymer, wherein the poly(meth)acrylate polymer comprises a block copolymer having at least one poly(meth)acrylate block that is substantially insoluble in the base oil;
- and
- (d) 0.05 weight percent to 5 weight percent of a metal-free phosphorous anti-wear agent:
- wherein the dynamic viscosity measured according to ASTM D4683 of the lubricating composition under shear at 150° C. is 1.4 mPa·s to 2.8 mPa·s.
3 more elements
(canceled)
Dependencies are inferred from the claim text.