초록 ▼

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 r

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.

대표청구항 ▼

A lubricating oil additive prepared by the process comprising: (A) in a first stage reaCting at about 50°-160°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 abo

A lubricating oil additive prepared by the process comprising: (A) in a first stage reaCting at about 50°-160°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°-210°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 lubricating oil composition comprising a major amount of a lubricating oil and a minor amount sufficient to impart antioxidant properties of an additive of claim 1.