Power transmission fluids with enhanced extreme pressure and antiwear characteristics
First Claim
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1. A fluid composition, comprising:
- (1) a major amount of a base oil, and (2) a minor amount of an additive comprising;
(A) sulfurized fatty oil in an amount sufficient to provide at least about 1,000 ppm sulfur to the fluid composition, and (B) dialkyl thiadiazole in an amount sufficient to provide at least about 500 ppm sulfur to the fluid composition.
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Abstract
A fluid composition is described for extreme pressure applications. The fluid composition includes a base oil, and an additive composition comprising sulfurized fatty oil in an amount sufficient to provide at least about 1,000 ppm sulfur to the fluid composition, and dialkyl thiadiazole in an amount sufficient to provide at least about 500 ppm sulfur to the fluid composition. Fluids containing these respective amounts of sulfurized fatty oil and dialkyl thiadiazole exhibit failure loads which equal or exceed about 1750 pounds at 100° C. and 150° C., respectively, as measured according to a Falex EP test of ASTM D-3233.
89 Citations
53 Claims
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1. A fluid composition, comprising:
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(1) a major amount of a base oil, and (2) a minor amount of an additive comprising;
(A) sulfurized fatty oil in an amount sufficient to provide at least about 1,000 ppm sulfur to the fluid composition, and (B) dialkyl thiadiazole in an amount sufficient to provide at least about 500 ppm sulfur to the fluid composition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. A fluid comprising a major amount of base oil, and a minor amount of an additive composition containing respective amounts of (A) sulfurized fatty oil and (B) dialkyl thiadiazole which, in combination, are effective, to provide a transmission fluid exhibiting failure loads which equal or exceed about 1750 pounds at 100°
- C. and 150°
C., respectively, as measured according to a Falex EP test of ASTM D-3233. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45)
- C. and 150°
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46. An additive composition comprising:
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(A) sulfurized fatty oil in an amount sufficient to provide at least about 1,000 ppm sulfur to the fluid composition, and (B) dialkyl thiadiazole in an amount sufficient to provide at least about 500 ppm sulfur to the fluid composition.
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47. An additive composition containing respective amounts of (A) sulfurized fatty oil and (B) dialkyl thiadiazole which, in combination, are effective, to provide a transmission fluid exhibiting failure loads which equal or exceed about 1750 pounds at 100°
- C. and 150°
C., as measured according to a Falex EP test of ASTM D-3233.
- C. and 150°
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48. A method for improving extreme pressure and/or wear performance in power transmitting apparatus comprising:
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1) adding a fluid to an power transmitting apparatus, said fluid comprising (a) a base oil, and (b) an additive package comprising sulfurized fatty oil in an amount sufficient to provide at least 1,000 ppm sulfur to the fluid, and dialkyl thiadiazole in an amount sufficient to provide at least 500 ppm sulfur to the fluid; and
2) operating the fluid in the power transmitting apparatus, wherein the extreme pressure and/or wear performance is improved relative to the extreme pressure and/or wear performance of a transmission without said fluid. - View Dependent Claims (49, 50, 51, 52)
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53. A method of increasing the service life of a transmission comprising operating in a transmission a fluid comprising:
- a) a base oil, and (b) an additive package comprising sulfurized fatty oil in an amount sufficient to provide at least 1,000 ppm sulfur to the fluid, and dialkyl thiadiazole in an amount sufficient to provide at least 500 ppm sulfur to the fluid, wherein the service life of the transmission is improved relative to the service life of a transmission without said fluid.
Specification