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US 8,138,132 B2Granted
Additive composition for EP greases with excellent antiwear and corrosion properties
AssigneeR.T. Vanderbilt Company, Inc.
InventorsGaston A Aguilar, Ronald J Hiza
Life of this patent
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Abstract
A lubricant composition is provided as follows: At least 90% of a base grease; (a) a thiadiazole poly(ether)glycol complex in an amount which provides about 1500 to 3500 ppm sulfur; (b) molybdenum dihydrocarbyldithiophosphate in amount which provides about 77 to 450 ppm molybdenum; and (c) zinc dihydrocarbyldithiophosphate in an amount which provides about 600 to 1000 ppm zinc. An additive composition for grease, consisting of components (a), (b) and (c), is also provided.
Claims7
A lubricant composition comprising, in weight %:
- at least 90% of a lithium or lithium complex base grease;
- and
- (a) a thiadiazole poly(ether)glycol complex in an amount which provides about 2400 to 3500 ppm sulfur;
- (b) molybdenum dihydrocarbyldithiophosphate in amount which provides about 200 to 450 ppm molybdenum;
- and
- (c) zinc dihydrocarbyldithiophosphate in an amount which provides about 800 to 1000 ppm zinc.
3 more elements
Dependencies are inferred from the claim text.