Lubricating oil compositions containing amidine antioxidants
AssigneeChevron Oronite Company LLC
InventorXuelei Lily Qian
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Abstract
The present invention provides a lubricating oil composition comprising: (a) a major amount of a lubricating oil, (a) a diarylamine antioxidant, and (b) an amidine compound of Formula (I), wherein R1 is hydrogen, an alkyl or an aromatic group containing 1-30 carbon atoms; x is from 1 to 5; Y is an optional linking alkyl group; Z is carbon or nitrogen; and R2 is hydrogen or alkyl groups containing 1-30 carbon atoms. Also provided is a method for lubricating an engine comprising lubricating the engine with said lubricating oil composition.
Claims16
A lubricating oil composition comprising:
- (a) a major amount of a lubricating oil,
- (b) a diarylamine antioxidant, and
- (c) an amidine compound of Formula (I),
- wherein R1 is hydrogen, an alkyl or an aromatic group containing 1-30 carbon atoms;
- x is from 1 to 5;
- Y is an optional linking alkyl group;
- Z is carbon or nitrogen;
- and R2 is hydrogen or alkyl groups containing 1-30 carbon atoms.
A method for lubricating an engine comprising lubricating the engine with a lubricating oil composition comprising:
- (a) a major amount of a lubricating oil,
- (b) a diarylamine antioxidant, and
- (c) an amidine compound of Formula (I),
- wherein R1 is hydrogen, an alkyl or an aromatic group containing 1-30 carbon atoms;
- x is from 1 to 5;
- Y is an optional linking alkyl group;
- Z is carbon or nitrogen;
- and R2 is hydrogen or alkyl groups containing 1-30 carbon atoms.
Dependencies are inferred from the claim text.