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US 2020/0318027 A1Published application
Lubricating Oil Composition Having Improved Air Release
AssigneeThe Lubrizol Corporation
InventorsDavid M. Hobson, Timothy R. Smith, David Price
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Abstract
The invention provides a lubricating oil composition comprising a ethylene/α-olefin copolymer and, optionally, and additive comprising an amine salt of a hydrocarbyl thiophosphoric acid ester. The invention also provides a method of improving air release of a lubricating oil composition by mixing an ethylene/α-olefin copolymer with an oil of lubricating viscosity.
Claims12
A lubricating oil composition comprising:
- (a) an oil of lubricating viscosity;
- (b) 2% to 17% by weight of an ethylene/α-olefin copolymer;
- and
- (c) 0.04% to 0.15% by weight of an additive comprising an amine salt of a hydrocarbyl thiophosphoric acid ester.
1 more element
A method of improving the air release of a lubricating oil composition, comprising:
- (i) providing (a) a base oil of lubricating viscosity, (b) 2% to 17% by weight of an ethylene/α-olefin copolymer, and (c) 0.04% to 0.15% by weight of an additive comprising an amine salt of a hydrocarbyl thiophosphoric acid ester;
- (ii) mixing the base oil of lubricating viscosity, the ethylene/α-olefin copolymer, and the additive to obtain a functional fluid.
Dependencies are inferred from the claim text.