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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, which is applied in the direction of lubricating composition, petroleum industry, additives, etc., and can solve problems such as the inability to add lubricating oil

Active Publication Date: 2006-11-22
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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Embodiment Construction

[0144] 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 anti-wear additives, and separately and additionally thiadiazole dimer derivatives containing molybdenum dithiocarbamate or molybdenum dithiophosphate (Vanlube® 972 additive) (invention test) were subjected to 4-ball Wear test (4-ball wear test). The base oil used was Hatco(R) HXL-7597, available from Hatco Corporation, which is a polyol ester containing antioxidants and corrosion inhibitors. The molybdenum dithiocarbamate tested was Molyvan(R) 822 additive (50% molybdenum dialkyl dithiocarbamate in 50% petroleum processing oil) available from R.T. Vanderbilt Company. The molybdenum dithiosulfate tested was Molyvan(R) L additive (75% molybdenum di(2-ethylhexyl)dithiophosphate in 25% petroleum processing oil) available from R.T. Vanderbilt Company....

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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, new requirements may arise based on more corrosion resistant materials produced from high chromium alloy steels such as 440C stainless steel and Pyrowear(R) 675 and Cronidur(R) 30, as well as composite ceramic / metal materials. 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-o...

Claims

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Application Information

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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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