Sulfurized compositions and lubricants containing them
AssigneeThe Lubrizol Corporation
InventorReed H. Walsh
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Abstract
A sulfurized composition prepared by sulfurizing a mixture of at least one terpene and at least one other olefinic compound is described. More particularly, sulfurized compositions prepared by sulfurizing a mixture of pine oil and at least one other olefinic compound are described. Such sulfurized compositions are useful as lubricant additive compositions, and more particularly, as additive compositions in industrial and gear lubricants. The compositions when added to lubricants provide lubricants which exhibit improved antioxidant characteristics, nitrile seal compatibility and acceptable color characteristics.
Claims29
A sulfurized composition prepared by the process which comprises sulfurizing a mixture comprising
- (A) at least one terpene compound, and
- (B) at least one other olefinic compound of the formula:
- R.sup.1 R.sup.2 C.dbd.CR.sup.3 R.sup.4
- wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are, independently, hydrogen or an organic group and the olefinic double bond is a non-aromatic double bond;
- wherein (A) and (B) are sulfurized in the presence of sulfur, sulfur halide, or a mixture of sulfur or sulfur dioxide and hydrogen sulfide;
- and wherein the equivalent ratio of the mixture of (A) to (B) is from about 1:20 to about 10:1.
A sulfurized composition prepared by the process which comprises the steps of
- (A) preparing a mixture comprising sulfur and at least one terpene compound,
- (B) heating said mixture to a temperature of up to about 150.degree. C. and maintaining this temperature for a period of from about 2 to 20 hours,
- (C) raising the temperature of the mixture to up to about 200.degree. C. while removing water and volatile materials,
- (D) adding at least one aliphatic olefinic compound to the mixture and maintaining the mixture at a temperature up to about 200.degree. C. for a period of up to about 15 hours.
Dependencies are inferred from the claim text.