Lubricant composition
AssigneeEdwin Cooper, Inc.
InventorsGerald J. J. Jayne, David R. Woods, Joseph P. O'Brien
Life of this patent
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Abstract
Lubricating oils having improved antioxidant and antiwear properties are obtained by adding a minor amount of a reaction product made by reacting an olefinic hydrocarbon containing about 6-18 carbon atoms and about 1-3 olefinic double bonds concurrently with sulfur and hydrogen sulfide to obtain a reaction intermediate and reacting this intermediate with additional olefin hydrocarbon which may be the same or different. Preferred olefinic hydrocarbons are dicyclopentadiene and alloocimene.
Claims24
A lubricating oil additive prepared by the process comprising:
- (A) in a first stage reacting at about 50.degree.-160.degree. C. about one mole of a first reactive olefinically unsaturated hydrocarbon containing about 6-18 carbon atoms and 1-3 olefinic double bonds with about 0.1-5 moles of elemental sulfur and about 0.1-1 moles of added hydrogen sulfide to obtain an intermediate, and
- (B) in a second stage reacting at about 100.degree.-210.degree. C. said intermediate with about 0.2-1 moles of a second reactive olefinically unsaturated hydrocarbon containing about 6-18 carbon atoms and 1-3 olefinic double bonds, said second olefinically unsaturated hydrocarbon being the same or different from said first olefinically unsaturated hydrocarbon, to obtain an oil soluble lubricating oil additive.
A process for making a lubricating oil additive, said process comprising:
- (A) in a first stage reacting at about 50.degree.-160.degree. C. about one mole of a first reactive olefinically unsaturated hydrocarbon containing about 6-18 carbon atoms and 1-3 olefinic double bonds concurrently with about 0.1-5 moles of elemental sulfur and about 0.1-1 moles of added hydrogen sulfide to obtain an intermediate, and
- (B) in a second stage reacting at about 100.degree.-210.degree. C. said intermediate with about 0.2-1 moles of a second reactive olefinically unsaturated hydrocarbon containing about 6-18 carbon atoms and 1-3 olefinic double bonds to obtain an oil soluble lubricating oil additive.
Dependencies are inferred from the claim text.