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机械工程学会摩擦学分会 固体润滑国家重点实验室 摩擦学学报
Lubricating compositions, functional fluids and greases containing thiophosphorus esters or their salts with a oxyalkylene group, and methods of using the same
专利摘要

This invention relates to a lubricating composition comprising a major amount of an oil of lubricating viscosity and at least one metal-free thiophosphorus acid ester, at least one amine salt of the thiophosphorus acid ester, or a mixture thereof, wherein the thiophosphorus acid ester contains at least one hydrocarbyl terminated oxyalkylene group, at least one hydrocarbyl terminated polyoxyalkylene group, or a mixture thereof. In one embodiment, the thiophosphorus acid ester is a thiophosphorus acid ester represented by the following formula wherein X1, X2, and X3 are oxygen or sulfur, provided that at least one of X1, X2, and X3 is sulfur; R1 is a hydrocarbyl group; R2 is an alkylene group; R3 is hydrogen or a hydrocarbyl group; x is a number from 1 to about 40; and a is 0, 1, or 2, or at least one salt of the thiophosphorus acid ester. The lubricating compositions, functional fluids and greases have improved antiwear/extreme pressure properties and improved antioxidation properties. In functional fluids, the thiophosphorus acid esters and their salts act as antiwear agents and rust inhibitors. ......

基本信息
  • 专利类型:

    发明专利

  • 申请/专利号:

    US08/956083

  • 申请日期:

    1997-10-23

  • 专利申请人:

    路博润公司

  • 分类号:

    ["C10M137/10","C10M137/00","C10M153/04","C10M153/00","C10M137/04"]

  • 发明/设计人:

    MATHUR, NARESH CHAND ， RAGUZ, MARY GALIC

  • 权利要求: We claim:1. A lubricating composition comprising a major amount of an oil of lubricating viscosity and at least one metal-free thiophosphorus acid ester, at least one amine salt of the thiophosphorus acid ester, or a mixture thereof, wherein the thiophosphorus acid ester contains at least one hydrocarbyl terminated oxyalkylene group, at least one hydrocarbyl terminated polyoxyalkylene group, or a mixture thereof.2. The composition of claim 1 wherein the hydrocarbyl moiety contains up to about 30 carbon atoms.3. The composition of claim 1 wherein the hydrocarbyl moiety is selected from the group consisting of butyl, octyl, dodecyl, stearyl, and oleyl.4. The composition of claim 1 wherein the oxyalkylene moiety contains from 1 to about 18 carbon atoms.5. The composition of claim 1 wherein the oxyalkylene moiety is selected from the group consisting of oxyethylene, oxypropylene, oxybutylene, and mixtures thereof.6. The composition of claim 1 wherein the hydrocarbyl terminated polyoxyalkylene group contains from 1 to about 40 oxyalkylene moieties.7. The composition of claim 1 wherein the hydrocarbyl terminated polyoxyalkylene group contains from 2 to about 12 oxyalkylene moieties.8. The composition of claim 1 wherein the thiophosphorus acid ester has at least two selected from the group consisting of a hydrocarbyl terminated oxyalkylene group and a hydrocarbyl terminated polyoxyalkylene group.9. The composition of claim 1 wherein the salt of thiophosphorus acid ester is derived from at least one amine.10. The composition of claim 9 wherein the amine is at least one tertiary aliphatic primary amine.11. The composition of claim 1 wherein the lubricating composition further comprises at least one sulfur compound, or at least one phosphorous or boron containing antiwear or extreme pressure agent.12. A lubricating composition comprising a major amount of an oil of lubricating viscosity and at least one metal-free monothiophosphorus acid ester containing at least one hydrocarbyl terminated oxyalkylene group or at least one hydrocarbyl terminated polyoxyalkylene group, or at least one amine salt of the monothiophosphorus acid ester.13. The composition of claim 12 wherein the hydrocarbyl moiety contains up to about 30 carbon atoms, wherein the oxyalkylene moiety contains from 1 to about 18 carbon atoms, and wherein the hydrocarbyl terminated polyoxyalkylene group contains from about 2 to about 40 oxyalkylene moieties.14. A lubricating composition comprising a major amount of an oil of lubricating viscosity and at least one metal-free thiophosphorus acid ester represented by the following formula ##STR6## wherein X.sub.1, X.sub.2, and X.sub.3 are oxygen or sulfur, provided that at least one of X.sub.1, X.sub.2, and X.sub.3 is sulfur; R.sub.1 is a hydrocarbyl group; R.sub.2 is an alkylene group; R.sub.3 is hydrogen or a hydrocarbyl group; x is a number from 1 to about 40; and a is 0, 1, or 2, or at least one salt of the thiophosphorus acid ester.15. The composition of claim 14 wherein R.sub.1 and R.sub.3 each independently contain up to about 30 carbon atoms.16. The composition of claim 14 wherein R.sub.2 contains from 1 to about 18 carbon atoms.17. The composition of claim 14 wherein X.sub.1 is sulfur, and X.sub.2 and X.sub.3 are oxygen, and a is 0 or 1.18. The composition of claim 14 wherein x is a number from 2 to about 10.19. The composition of claim 14 wherein the salt is at least one amine salt and R.sub.3 is hydrogen.20. The composition of claim 14 wherein the lubricating composition further comprises at least one sulfur compound, or at least one phosphorous or boron antiwear or extreme pressure agent.21. A lubricating composition comprising a major amount of an oil of lubricating viscosity and at least one thiophosphorus acid ester represented by the following formula ##STR7## wherein R.sub.1 is a hydrocarbyl group; R2 is an alkylene group; R.sub.3 is hydrogen or a hydrocarbyl group; x is a number from 1 to about 40; and a is 0, 1, or 2, or at least one salt of the thiophosphorus acid ester.22. The composition of claim 21 wherein R.sub.1 and R.sub.3 each independently contain up to about 30 carbon atoms, R.sub.2 contains from 1 to about 18 carbon atoms, and x is a number from 2 to about 10.23. The composition of claim 21 wherein the salt is at least one amine salt, and R.sub.3 is hydrogen.24. The composition of claim 21 wherein the lubricating composition further comprises at least one sulfur compound, or at least one phosphorous or boron containing antiwear or extreme pressure agent.25. The composition of claim 21 wherein the lubricating composition is a metal working fluid, a hydraulic fluid, or an automatic transmission fluid.26. A gear oil composition comprising a major amount of gear oil base fluid and at least one metal-free thiophosphorus acid ester containing at least one hydrocarbyl terminated oxyalkylene group or at least one hydrocarbyl terminated polyoxyalkylene group, or at least one salt of the thiophosphorus acid ester.27. The composition of claim 26 wherein the thiophosphorus acid ester is represented by the following formula ##STR8## wherein X.sub.1, X.sub.2, and X.sub.3 are independently oxygen or sulfur, provided that at least one of X.sub.1, X.sub.2, and X.sub.3 is sulfur; R.sub.1 is a hydrocarbyl group; R.sub.2 is an alkylene group; R.sub.1 is hydrogen or a hydrocarbyl group; x is a number from 1 to about 40; and a is 0, 1, or 2.28. The composition of claim 26 wherein the lubricating composition further comprises at least one sulfur compound, or at least one phosphorous or boron containing antiwear or extreme pressure agent.29. A grease composition comprising an oil of lubricating viscosity, at least one thickener, and at least one metal-free thiophosphorus acid ester containing at least one hydrocarbyl terminated oxyalkylene group or at least one polyoxyalkylene group, or at least one amine salt of the thiophosphorus acid ester.30. A concentrate comprising a substantially inert, organic diluent and from 0.1% to about 99% by weight of at least one metal-free thiophosphorus acid ester containing at least one hydrocarbyl terminated oxyalkylene group or at least one polyoxyalkylene group, or at least one amine salt of the thiophosphorus acid ester.31. A lubricating composition comprising a major amount of an oil of lubricating viscosity and at least one metal-free thiophosphorus acid ester having three pendant groups selected from the group consisting of hydrocarbyl terminated oxyalkylene group, hydrocarbyl terminated polyoxyalkylene groups or mixtures thereof.32. The composition of claim 31 wherein the thiophosphorus acid ester is used in combination with at least one metal-free thiophosphorus acid ester containing 1 or 2 hydrocarbyl terminated oxyalkylene groups, hydrocarbyl terminated polyoxyalkylene groups, or a mixture thereof.33. The composition of claim 31 further comprising a corrosion or oxidation inhibiting agent.
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