Lubricants Containing Multifunctional Additive Packages Therein for Improving Load-Carrying Capacity, Increasing Surface Fatigue Life and Reducing Friction

Abstract

The present invention provides a composition for improving load carrying capacity, extreme pressure performance, surface fatigue life, and other performance characteristics of a lubricant. The composition includes a base stock and a combination of two, three, or all of a friction modifier, and antiwear additive, an extreme pressure additive, and a surface fatigue life modifier. The present invention further provides a method for improving the performance characteristics of a lubricant. The method includes a step of mixing a lubricant with the above-described multifunctional lubricant additive composition or mixing a lubricant base stock with the above-described multifunctional lubricant additive composition.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]The present application claims the benefit of U.S. Provisional Application No. 60 / 625,416 filed Nov. 4, 2004, and is related to the following co-pending and commonly-owned applications which were filed herewith and are hereby incorporated by reference in full: “Lubricant Additive Packages for Improving Load-Carrying Capacity and Surface Fatigue Life” (Attorney Docket No. 0002290WOU, EH-11605), U.S. Ser. No. ______; “Multifunctional Lubricant Additive Package” (Attorney Docket No. 0002291WOU, EH-11679), U.S. Ser. No. ______; and “Multifunctional Lubricant Additive Package for a Rough Mechanical Component Surface” (Attorney Docket No. 0002295WOU, EH-1 1698), U.S. Ser. No. ______.GOVERNMENT RIGHTS IN THE INVENTION[0002]The invention was made by, or under contract with, the National Institute of Standards and Technology of the United States Government under contract number: 70NANBOH3048.BACKGROUND OF THE INVENTION[0003]1. Field of the Inventi...

AI Technical Summary

Benefits of technology

[0012]In a preferred embodiment, this invention provides a lubricant having a multifunctional lubricant additive composition included therein for improving the performance characteristics of the lubricant for use in transmission fluid products that meet both civil and military specifications.

[0013]In another embodiment, the present invention provides a lubricant having a multifunctional lubricant additive composition included therein for use in improving the performance of metals and alloys of power transmission components, including gears, bearings, spines, shafts and springs.

[0014]In another embodiment, this invention provides a lubricant having a multifunctional lubricant additive composition included therein for improving the performance characteristics of engines and related propulsive devices used to power automobiles, both stock (production) and specialty (e.g. racing and other high performance) varieties, and heavy on- and off-road equipment, such as farm implements and construction equipment.

[0015]In another embodiment, the present invention provides a lubricant having a multifunctional lubricant additive composition included therein that beneficially reduces friction and scuffing (scoring), and increases resistance to surface degradation, including but not limited to fatigue, including micro- and macro-pitting, and wear.

[0016]In yet another embodiment, the present invention provides a lubricant having a multifunctional lubricant additive composition included therein for improving the performance characteristics of an applied mechanical system. Embodiments of this lubricant comprise the following components:

Problems solved by technology

These contact portions or zones, such as drive rolling surfaces, and gear and ball-and roller bearings, are known to be susceptible to high surface pressures.

In addition, internal combustion engines and other propulsion devices, especially those that are common for high-performance and racing applications, are subject to taxing demands in the form of inertial loading, high sliding and / or rolling speeds, and marginal lubrication.

By reducing friction, wear, and pressure, and improving scoring (scuffing) resistance, these additives prolong surface fatigue life for lubricated contacts within transmission systems and propulsive devices.

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