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Lubricating compositions containing synthetic ester base oil, molybdenum compounds and thiadiazole-based compounds

A technology of lubricating composition and molybdenum compound, applied in lubricating composition, petroleum industry, additives, etc., can solve the problem of inability to add lubricating oil and the like

Active Publication Date: 2008-08-20
VANDERBILT CHEM LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Such additives cannot be incorporated into lubricating oils due to solubility issues

Method used

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  • Lubricating compositions containing synthetic ester base oil, molybdenum compounds and thiadiazole-based compounds
  • Lubricating compositions containing synthetic ester base oil, molybdenum compounds and thiadiazole-based compounds
  • Lubricating compositions containing synthetic ester base oil, molybdenum compounds and thiadiazole-based compounds

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Experimental program
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Embodiment Construction

[0146] Referring to the following Tables 1 and 2, the polyol ester base oil alone (test 1), the existing TCP (tricresyl phosphate)-based bearing lubricant (comparative test 2), and commonly used in gas turbine oil compositions Known antiwear additives in , and thiadiazole dimer derivatives alone and additionally containing molybdenum dithiocarbamate or molybdenum dithiophosphate ( 972 Additive) (Invention Test) was subjected to a 4-ball wear test. The base oil used was available from Hatco Corporation HXL-7597, which is a polyol ester containing antioxidants and corrosion inhibitors. The molybdenum dithiocarbamate tested is available from R.T. Vanderbilt Company 822 additive (50% molybdenum dialkyl dithiocarbamate in 50% petroleum processing oil). The molybdenum dithiosulfate tested is available from R.T. Vanderbilt Company L Additive (75% molybdenum bis(2-ethylhexyl)dithiophosphate in 25% petroleum processing oil).

[0147] The results in the table below clearly demo...

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Abstract

A lubricating composition providing excellent anti-wear protection for corrosion-resistant materials which comprises a major amount of a synthetic ester base oil, and a minor amount of a molybdenum compound and an anti-wear additive selected from the group consisting of 1,3,4-thiadiazole derivatives as an anti-wear additive, the reaction products of 2,5-dimercapto-1,3,4-thiadiazole dimers and poly(ether)glycols, and 2,5-dimercapto-1,3,4-thiadiazole monomer and mixtures thereof. Also described is a method for imparting anti-wear properties to a corrosion resistant material, comprising using the lubricating composition of the invention.

Description

[0001] related application [0002] This application claims priority under 35 U.S.C. §119(e) to U.S. Provisional Application No. 60 / 510,513, filed October 10, 2003, and U.S. Provisional Application No. 60 / 519,151, filed November 12, 2003. Background of the invention [0003] Currently, bearing materials for military gas turbine engines are based on M50 steel. However, in materials such as 440C stainless steel and 675 and 30 high-chromium alloy steel, and composite ceramic / metal materials based on more corrosion-resistant materials may raise new requirements. However, it has been found that the standard lubricant currently used with M50 steel (tricresyl phosphate (TCP) in a polyol ester base) does not obtain sufficient antiwear protection when used with 440C steel. [0004] U.S. Patent No. 5,422,023 to Francisco teaches extreme pressure / antiwear additives for aviation turbine oils comprising 2,5-dimercapto-1,3,4-thiadiazole monomers and alpha-olefins / hormones ester copol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M135/36C10M139/00
Inventor 史蒂文·G·唐纳利罗纳德·J·赫泽
Owner VANDERBILT CHEM LLC
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