Lubricant and fuel compositions containing 2-(S(N)-mercaptobenzothiazole)succinic and methylene succinate esters
View Patent ↗Disclosed herein is composition comprising: (A) a lubricant or a hydrocarbon fuel; (B) at least one additive that is a 2-(S(N)-mercaptobenzothiazole)succinic or methylene succinate esters of a structure defined herein; and optionally (C) at least one zinc dihydrocarbyldithiophosphate.
1. A composition comprising:
(A) a lubricant or a hydrocarbon fuel;
(B) at least one additive of a structure selected from the group consisting of:
and wherein R, R 1 and R 2 are independently selected from the group consisting of linear and branched alkyl groups; and, optionally,
(C) at least one zinc dihydrocarbyldithiophosphate of formula:
wherein n is 2, and R 2 and R 3 are independently selected hydrocarbyl groups or hydrocarbyl-substituted alkyl groups.
2. The composition of claim 1 wherein (A) is a lubricating oil.
3. The composition of claim 1 wherein R, R 1 and R 2 of the at least one additive are independently selected from the group consisting of linear and branched alkyl groups of from 1 to about 12 carbon atoms.
4. The composition of claim 2 wherein R, R 1 and R 2 of the at least one additive are independently selected from the group consisting of linear and branched alkyl groups of from 1 to about 12 carbon atoms.
5. The composition of claim 1 wherein R 2 and R 3 of the at least one zinc dihydrocarbyldithiophosphate are independently selected alkyl, cycloalkyl, aralkyl, alkaryl, or hydrocarbyl-substituted alkyl, cycloalkyl, aralkyl, or alkaryl groups, and wherein the R 2 and R 3 groups in the acid each have, on average, at least three carbon atoms.
6. The composition of claim 2 wherein R 2 and R 3 of the at least one zinc dihydrocarbyldithiophosphate are independently selected alkyl, cycloalkyl, aralkyl, alkaryl, or hydrocarbyl-substituted alkyl, cycloalkyl, aralkyl, or alkaryl groups, and wherein the R 2 and R 3 groups in the acid each have, on average, at least three carbon atoms.
7. The composition of claim 1 wherein (C) is present.
8. A method for improving the anti-fatigue, anti-wear, and extreme pressure properties of lubricants and hydrocarbon fuels comprising adding to said lubricants and hydrocarbon fuels:
(A) at least one additive of a structure selected from the group consisting of:
and wherein R, R 1 and R 2 are independently selected from the group consisting of linear and branched alkyl groups; and, optionally,
(B) at least one zinc dihydrocarbyldithiophosphate of formula:
wherein n is 2, and R 2 and R 3 are independently selected hydrocarbyl groups or hydrocarbyl-substituted alkyl groups.
9. The method of claim 8 wherein the lubricant is a lubricating oil.
10. The method of claim 8 wherein R, R 1 and R 2 of the at least one additive are independently selected from the group consisting of linear and branched alkyl groups of from 1 to about 12 carbon atoms.
11. The method of claim 9 wherein R, R 1 and R 2 of the at least one additive are independently selected from the group consisting of linear and branched alkyl groups of from 1 to about 12 carbon atoms.
12. The method of claim 8 wherein R, R 1 and R 2 of the at least one additive are independently selected alkyl, cycloalkyl, aralkyl, alkaryl, or hydrocarbyl-substituted alkyl, cycloalkyl, aralkyl, or alkaryl groups, and wherein the R 2 and R 3 groups in the acid each have, on average, at least three carbon atoms.
13. The method of claim 9 wherein R 2 and R 3 of the at least one zinc dihydrocarbyldithiophosphate are independently selected alkyl, cycloalkyl, aralkyl, alkaryl, or hydrocarbyl-substituted alkyl, cycloalkyl, aralkyl, or alkaryl groups, and wherein the R 2 and R 3 groups in the acid each have, on average, at least three carbon atoms.
14. The method of claim 8 wherein (B) is present.
15. A method for improving the anti-fatigue, anti-wear, and extreme pressure properties of a lubricating oil comprising adding to said oil:
(A) from about 0.01 to about 10 wt % of at least one additive of a structure selected from the group consisting of:
and wherein R, R 1 and R 2 are independently selected from the group consisting of linear and branched alkyl groups of from 1 to about 12 carbon atoms; and, optionally,
(B) from about 0.01 to about 10 wt % of at least one zinc dihydrocarbyldithiophosphate of formula:
wherein n is 2, and R 2 and R 3 are independently selected alkyl, cycloalkyl, aralkyl, alkaryl, or hydrocarbyl-substituted alkyl, cycloalkyl, aralkyl, or alkaryl groups, and wherein the R 2 and R 3 groups in the acid each have, on average, at least three carbon atoms.
16. The composition of claim 1 wherein (B) is present in a concentration in the range of from about 0.01 to about 10 wt %.
17. The composition of claim 1 wherein (C) is present in a concentration in the range of from about 0.01 to about 10 wt %.
18. The method of claim 8 wherein (A) is present in a concentration in the range of from about 0.01 to about 10 wt %.
19. The method of claim 8 wherein (B) is present in a concentration in the range of from about 0.01 to about 10 wt %.