Sulfurized polyisobutylene based wear and oxidation inhibitors
Sulfurized olefin compositions and compounds of the formula: wherein R 1 is hydrogen or methyl; X is sulfur or oxygen; m is an integer from 1 to 9; and n is 0 or 1, and when n is 0 then R 1 is methyl, and when n is 1 then R 1 is hydrogen are disclosed. The resulting compounds are particularly the polyisobutyl-1,2-dithiole-4-cyclopentene-3-thione compounds and derivatives are useful in lubricating oils.
1. A compound of Formula I:
wherein
R 1 is hydrogen;
X is sulfur or oxygen;
m is an integer from 1 to 5; and
n is equal to one.
2. The compound according to claim 1 wherein X is sulfur.
3. The compound according to claim 1 wherein m is greater than one.
4. A lubricating composition comprising:
a. an oil of lubricating viscosity; and
b. a compound of Formula I:
wherein
R 1 is hydrogen;
X is sulfur or oxygen;
m is an integer from 1 to 5; and
n is equal to one.
5. The lubricating composition according to claim 4 , wherein said composition contains from about 0.01 to 10 wt % of b) based upon the total weight of the composition.
6. The lubricating composition according to claim 5 , wherein said composition contains from about 0.05 to 3 wt % of b) based upon the total weight of the composition.
7. The lubricating composition according to claim 6 , wherein said composition contains from about 0.05 to 1 wt % of b) based upon the total weight of the composition.
8. The lubricating composition according to claim 5 , wherein said composition contains from about 0.5 to 8 wt % of b) based upon the total weight of the composition.
9. The lubricating composition according to claim 8 , wherein said composition contains from about 1 to 5 wt % of b) based upon the total weight of the composition.
10. The lubricating composition according to claim 9 , wherein said composition contains from about 2 to 4 wt % of b) based upon the total weight of the composition.
11. The lubricating composition according to claim 4 further comprising:
c. an ashless dispersant;
d. a detergent;
e. a metal dialkyl dithiophosphate.
12. A gear lubricating composition comprising:
a. a major amount of oil of lubricating viscosity;
b. 0.5 to 8.0 wt. % in terms of sulfur content of a compound of Formula I:
wherein
R 1 is hydrogen;
X is sulfur or oxygen;
m is an integer from 1 to5; and
n is equal to one;
c. 0.05 to 5.0 wt. % in terms of phosphorous content of at least one oil soluble phosphorous containing compound selected from extreme pressure agents and antiwear agents;
d. 0.04 to 1.0 wt. % in terms of boron content of an alkali-metal borate or hydrate thereof.
13. The gear lubricating composition according to claim 12 further comprising at least one of the following additional components:
e. 0.1 to 5 wt. % based upon the weight of said lubrication composition of at least one ashless dispersant;
f: 0.1 to 0.8 wt. % based upon the weight of said lubrication composition of at least one copper corrosion inhibitor;
g. 0.01 to 0.1 wt. % based upon the weight of said lubrication composition of at least one foam inhibitor
h. 0.01 to 0.1 wt. % % based upon the weight of said lubrication composition of at least one antitrust agent.
14. An additive concentrate comprising:
a. from about 85 to 95 weight percent of a compound of Formula I:
wherein
R 1 is hydrogen;
X is sulfur or oxygen;
m is an integer from 1 to 5; and
n is equal to one;
b. from about 5 to 15 weight percent of an inert organic liquid diluent.
15. The additive concentrate according to claim 14 wherein X is sulfur.
16. The lubricating composition according to claim 4 wherein X is sulfur.
17. The gear lubricating composition according to claim 12 wherein X is sulfur.