Lubricating Composition With Improved TBN Retention
AssigneeThe Lubrizol Corporation
InventorsMary Galic Raguz, Virginia A. Carrick
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Abstract
The invention provides a lubricating composition containing a diarylamine, an aminobenzene and an oil of lubricating viscosity. The invention further relates to the use of the lubricating composition in an internal combustion engine. The invention further relates to the use of the lubricating composition to improve TBN retention.
Claims12
A lubricating composition comprising (a) an oil of lubricating viscosity, (b) a diarylamine wherein at least one of the aryl groups comprises two or more edge-sharing rings, and (c) an anthranilate ester different from (b).
A method of improving the oxidative stability of a lubricating composition which contains an oil of lubricating viscosity, comprising including within said lubricating composition a combination of (b) a diarylamine wherein at least one of the aryl groups comprises 2 or more edge-sharing rings, and (c) an anthranilate ester different from (b).
A method of improving TBN retention of a lubricating composition which contains an oil of lubricating viscosity, comprising including within said lubricating composition a combination of (b) a diarylamine wherein at least one of the aryl groups comprises 2 or more edge-sharing rings;
- (c) an anthranilate ester different from (b);
- and (d) an overbased detergent in an amount that delivers at least 2 TBN to the lubricating composition.
Dependencies are inferred from the claim text.