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US 2018/0002631 A1Published application
Combinations of Phosphorous-Containing Compounds for Use as Anti-Wear Additives in Lubricant Compositions
AssigneeAfton Chemical Corporation
InventorJeffrey L. MILNER
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Abstract
The present disclosure relates to a lubricant composition comprising a first phosphorus compound, a second phosphorus compound, and a third phosphorus compound, wherein the first phosphorus compound is present in the lubricant composition in an amount to provide between about 120 and 350 ppm phosphorus. The lubricant composition may provide robust anti-wear and reduced pitting.
Claims29
A lubricant composition comprising:
- (a) a first phosphorus compound formed by:
- (i) reacting an O,O-dihydrocarbyl phosphorodithioic acid with an epoxide to form a product;
- (ii) reacting the product with phosphorus pentoxide to produce an acid phosphate intermediate;
- and
- (iii) neutralizing at least a major portion of the intermediate with at least one first amine;
- (b) a second phosphorus compound formed by reacting a sulfur source with a dihydrocarbyl phosphite;
- (c) a third phosphorus compound formed by reacting an acid phosphate with at least one second amine;
- (d) wherein the first phosphorus compound is present in the lubricant composition to provide between about 120 and about 350 ppm phosphorus to the lubricant composition and said first and second amine may be the same or different.
5 more elements
Dependencies are inferred from the claim text.