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Hydraulic Composition with Improved Wear Properties

a technology of wear properties and hydraulic compositions, applied in the direction of lubricant compositions, liquid carbonaceous fuels, fuels, etc., can solve the problems of unresponsive control, difficult cleaning of hydraulic systems, and affecting the performance of hydraulic systems, so as to reduce friction and reduce wear.

Inactive Publication Date: 2011-11-24
THE LUBRIZOL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0010]The invention provides a method for lubricating a mechanical device requiring industrial fluids, hydraulic fluids, turbine oils, circulating oils, or combinations thereof, the method comprising: (I) supplying the mechanical device with a lubricating composition comprising: (a) an oil of lubricating viscosity wherein the oil is substantially free of sulfur; and (b) a friction modifier; resulting in reduced wear, reduced friction, or combinations thereof within the device.

Problems solved by technology

However such agents may form deposits such as resins, sludge and varnish in the hydraulic system.
These deposits impair the performance of the hydraulic systems by causing valve sticking and unresponsive control.
Additionally, the cleaning of these systems is difficult since the deposits are difficult to remove without mechanical abrasion.
Further the use of substituted polyisobutylene succinic acid or anhydride derivatives of polyol esters or polyamines are excluded because lubricating compositions that contain said additive do not exhibit acceptable rust resistance properties.

Method used

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  • Hydraulic Composition with Improved Wear Properties
  • Hydraulic Composition with Improved Wear Properties
  • Hydraulic Composition with Improved Wear Properties

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0120]A hydraulic fluid composition is prepared by adding 5000 ppm of glycerol monooleate to Motiva™ Star Group II oil. No other additives are added. Motiva™ Star Group II oil contains about 9 ppm sulfur.

example 2

[0121]A hydraulic fluid composition is prepared by adding 1000 ppm of glycerol monooleate to Motiva™ Star Group II oil. No other additives are added.

example 3

[0122]A hydraulic fluid composition is prepared by adding 500 ppm of glycerol monooleate to the composition of Comparative Example 1.

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Abstract

The present invention relates to methods of lubricating a mechanical device by using a low sulfur lubricating composition that contains a friction modifier and provides improved antiwear performance. The invention further provides the lubricating compositions used therein.

Description

FIELD OF INVENTION[0001]The present invention relates to methods of lubricating a mechanical device by using a lubricating composition that contains a friction modifier and supplies improved antiwear performance. The invention further provides the lubricating compositions used therein.BACKGROUND OF THE INVENTION[0002]It is known to employ a metal containing antiwear agent, such as a zinc containing antiwear agent, in a lubricating composition suitable for a hydraulic system, circulating oil or another industrial oil. However such agents may form deposits such as resins, sludge and varnish in the hydraulic system. These deposits impair the performance of the hydraulic systems by causing valve sticking and unresponsive control. Additionally, the cleaning of these systems is difficult since the deposits are difficult to remove without mechanical abrasion.[0003]International publication WO96 / 035765 discloses a lubricating composition with a rust reducing or preventing amount of 0.1 to 3...

Claims

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Application Information

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IPC IPC(8): C10M169/04
CPCC10M129/18C10M129/40C10N2270/02C10N2260/14C10N2240/14C10N2240/08C10N2230/43C10N2230/24C10N2230/06C10N2220/028C10M2223/049C10M2223/047C10M2223/045C10M129/70C10M129/74C10M133/04C10M133/16C10M133/46C10M133/48C10M137/02C10M141/10C10M2203/1006C10M2203/1025C10M2205/0285C10M2205/173C10M2207/026C10M2207/042C10M2207/125C10M2207/281C10M2207/283C10M2207/34C10M2209/084C10M2209/103C10M2215/04C10M2215/042C10M2215/064C10M2215/08C10M2215/224C10M2215/225C10M2223/043C10N2210/02C10N2020/071C10N2030/24C10N2030/43C10N2030/06C10N2040/135C10N2040/08C10N2060/14C10N2070/02C10N2010/04C10M169/04
Inventor FILIPPINI, BRIAN B.
Owner THE LUBRIZOL CORP