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Lubricant Compositions

a technology of compositions and lubricants, applied in the field of lubricant compositions, can solve problems such as difficulty in meeting performance criteria, and achieve the effect of reducing friction between parts and high performan

Inactive Publication Date: 2011-05-12
COGNIS IP MANAGEMENT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0017]Applicants have found that certain SAE 75W-140 lubricant compositions of the present invention meet API GL-5 performance requirements and provide cost-effective lubricant compositions that exhibit improved performance in ring and pinion gears with respect to one or more, and preferably all, of the following advantageous properties: ridging, rippling, pitting, spalling, scoring, and wear.

Problems solved by technology

These properties represent a difficult to achieve set of performance criteria.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

examples

[0046]The following examples are provided for the purpose of illustrating the present invention, but without limiting the scope thereof.

[0047]Example Lubricant Composition 1 was prepared by mixing together the components as shown in Table 2 as follows.

TABLE 2Amount ComponentComposition(weight %)Base-stockLow Viscosity PAO23(73.9% ChevronPhillips PAO-2, 26.1%Ineos PAO-6)Base-stockDiester14(Cognis Synative 2970 / diisodecladipate)Viscosity ImproverHigh Viscosity PAO45(ExxonMobil or Chemtura PAO-100)Viscosity ImproverPolyisobutylene10(Ineos H-1500-SPA)AdditiveAPI GL-5 Additive Package8.5(Afton HiTec 317)AdditiveAntifoam Additive0.002(Dow Corning DC-200 / 60,000)

[0048]Performance of Lubricant Compositions in Axles Under High Speed and Shock Loading: L-42 (ASTM D 7452)

[0049]The objective of this procedure is to evaluate the anti-scoring properties of gear lubricants under high-speed and shock conditions. The performance of procedure lubricants is compared to that of reference oils. A special...

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Abstract

A lubricant composition characterized by the Society of Automotive Engineers (“SAE”) as 75W-140 capable of meeting the American Petroleum Institute's (“API”) GL-5 performance classification requirements for use in association with a device involving metal to metal contact of moving parts comprising: (a) base-stock comprising (i) at least one relatively low viscosity polyalphaolefin, and (ii) at least one diester; (b) viscosity improver comprising (i) at least one relatively high viscosity polyalphaolefin, and (ii) polyisobutylene; and (c) a performance additive comprising at least one additive effective to improve at least one property of the lubricant and / or the performance of the equipment in which the lubricant is to be used.

Description

FIELD OF THE INVENTION[0001]This invention relates to lubricant compositions having utility in numerous applications, particularly in connection with gear, transmission and / or axle applications in the automotive and machinery industries.BACKGROUND OF THE INVENTION[0002]An important function of lubricant compositions, and in particular gear and axle lubricant fluids, is to provide a high degree of reliability and durability in the service life of equipment in which it is installed. Lubricating oils in general, and gear and axle lubricants in particular, frequently must satisfy a relatively large number of performance criteria to be commercially successful. For example, a commercially successful axle lubricant will frequently be required to possess a high degree of oxidative stability, compatibility, shear stability, corrosion avoidance or resistance, wear protection, shiftability, and extended drain. These properties represent a difficult to achieve set of performance criteria.[0003]...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C10M169/04
CPCC10M169/041C10M2205/026C10N2240/02C10N2230/26C10N2230/18C10M2205/028C10M2205/0285C10M2207/2835C10N2230/02C10N2230/06C10N2230/08C10N2230/10C10N2230/12C10N2220/022C10N2030/18C10N2030/26C10N2030/02C10N2030/10C10N2030/06C10N2030/08C10N2030/12C10N2040/02C10N2020/02
Inventor LAKES, STEPHENWITSCHGER, MARKBALASUBRAMANIAM, VASUDEVAN
Owner COGNIS IP MANAGEMENT GMBH
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