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Lubricating Composition Containing Ashfree Antiwear Agent Based on Hydroxypolycarboxylic Acid Derivative and a Molybdenum Compound

a technology of hydroxypolycarboxylic acid and molybdenum compound, which is applied in the direction of lubricant composition, molybdeum compound, chemistry apparatus and processes, etc., can solve the problems of reducing the performance of said catalysts, zddp is believed to have a detrimental impact on fuel economy and efficiency, and interferes with each other's respective functions, so as to reduce or prevent phosphorus emissions, reduce or prevent sulphur emissions

Inactive Publication Date: 2010-08-05
THE LUBRIZOL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0029]In one embodiment the invention provides for the use of a lubricating composition as disclosed herein for providing at least one of (i) reducing or preventing phosphorus emissions, (ii) reducing or preventing sulphur emissions, (ii) wholly or partially replacing ZDDP in lubricating oils, (iii) improving fuel economy, and (iv) fuel economy retention / efficiency.

Problems solved by technology

ZDDP is also believed to have a detrimental impact on fuel economy and efficiency.
Both ZDDP and friction modifier function by adsorption on sliding surfaces, and each may interfere with each other's respective functions.
In addition, sulphur and phosphorus tend to poison the catalysts used in catalytic converters, resulting in a reduction in performance of said catalysts.
However, reducing the levels of antiwear additives such as ZDDP, is likely to increase wear and result in other detrimental performance of an engine.
In addition, as technology develops, components of an engine are exposed to more severe operating conditions.

Method used

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  • Lubricating Composition Containing Ashfree Antiwear Agent Based on Hydroxypolycarboxylic Acid Derivative and a Molybdenum Compound
  • Lubricating Composition Containing Ashfree Antiwear Agent Based on Hydroxypolycarboxylic Acid Derivative and a Molybdenum Compound
  • Lubricating Composition Containing Ashfree Antiwear Agent Based on Hydroxypolycarboxylic Acid Derivative and a Molybdenum Compound

Examples

Experimental program
Comparison scheme
Effect test

example 1 (

EX1)

[0124]A lubricating composition is prepared containing 1 wt % of di-2-ethylhexyl tartrate, 0.6 wt % of other antiwear agents, 7.9 wt % of dispersants, 1.5 wt % of detergents, 3.6 wt % of antioxidants including an effective amount of molybdenum dithiocarbamate, 6.1 wt % of viscosity modifier, 0.1 wt % of corrosion inhibitor, and 0.1 wt % of friction modifier. The lubricating composition has a sulphated ash content of 0.6 wt %, a phosphorus content of about 570 ppm, and a sulphur content of 0.17 wt %.

example 2 (

EX2)

[0125]A lubricating composition is prepared containing 1 wt % of a C12-14-alkyl tartrate, 4.1 wt % of dispersants, 1.4 wt % of detergents, 2.5 wt % of antioxidants including 0.7 wt % of molybdenum dithiocarbamate (commercially available as Sakuralube™515, manufactured by Asahi Denka), 0.56 wt % of antiwear agents, 0.1 wt % of corrosion inhibitor, and 0.1 wt % of friction modifier. The lubricating composition has a phosphorus content of about 560 ppm.

example 3 (

EX3)

[0131]A lubricating composition is designed to meet Euro 4 and Euro 5 emission standards and containing 1 wt % of C8-10 alkyl tartrate. The lubricating composition has a phosphorus content of 900 ppm or less, 0.3 wt % or less of sulphur, and 0.9 wt % or less of sulphated ash.

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PUM

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Abstract

The invention provides a lubricating composition containing an oil of lubricating viscosity, an oil soluble molybdenum compound, and an ashless antiwear agent. The invention further provides for a new antioxidant. The lubricating composition is suitable for lubricating an internal combustion engine.

Description

FIELD OF INVENTION[0001]The invention provides a lubricating composition containing an oil of lubricating viscosity, an oil soluble molybdenum compound, and an ashless antiwear agent. The invention further provides for a new antioxidant. The lubricating composition is suitable for lubricating an internal combustion engine.BACKGROUND OF THE INVENTION[0002]Engine manufacturers have focused on improving engine design in order to improve fuel economy and efficiency (typically, based on Federal Corporate Average Fuel Economy (CAFE) standards). Whilst improvements in engine design and operation have contributed, improved formulation of engine oil lubricant may also improve fuel economy and efficiency. Lubricants function to reduce and disperse engine deposits which accumulate when the engines are running. They also serve to reduce the friction between sliding moving parts (typically metallic or ceramic) that are in contact.[0003]It is well known for lubricating oils to contain a number of...

Claims

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Application Information

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IPC IPC(8): C10M141/12
CPCC10M141/12C10M2207/028C10N2240/10C10N2230/45C10N2230/43C10N2230/42C10N2230/10C10N2230/06C10M2223/045C10M2207/10C10M2207/24C10M2207/262C10M2207/281C10M2207/289C10M2215/02C10M2215/08C10M2215/082C10M2215/086C10M2215/224C10M2215/28C10M2219/046C10M2219/062C10M2219/068C10M2219/089C10M2223/043C10N2210/06C10N2030/06C10N2030/10C10N2040/25C10N2030/42C10N2030/43C10N2030/45C10N2010/12C10M129/72C10M129/76
Inventor MOSIER, PATRICK E.KOCSIS, JODYDAVIES, MARK
Owner THE LUBRIZOL CORP
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