Oxadiazole additives for lubricants
View Patent ↗Disclosed herein is a composition comprising: (A) a lubricant, and (B) at least one 5-hydrocarbyl-2-mercapto-1,3,4-oxadiazole compound of the formula: wherein R 1 is a hydrocarbon or functionalized hydrocarbon of from 1 to 30 carbon atoms.
1. A composition comprising:
(A) a lubricant, and
(B) at least one 5-hydrocarbyl-2-mercapto-1,3,4-oxadiazole selected from the group consisting of:
(i) compounds of the formula:
wherein R 1 is a functionalized hydrocarbon of from 1 to 30 carbon atoms; and
(ii) 5-oleyl-2-mercapto-1,3,4-oxadiazole.
2. The composition of claim 1 wherein R 1 is a functionalized hydrocarbon of from 1 to 22 carbon atoms.
3. The composition of claim 2 wherein R 1 is based on a fatty acid or mixture of fatty acids.
4. The composition of claim 1 wherein the 5-hydrocarbyl-2-mercapto-1,3,4-oxadiazole is present in a concentration in the range of from about 0.01 to about 10 wt %.
5. The composition of claim 1 further comprising at least one additive selected from the group consisting of dispersants, detergents, corrosion/rust inhibitors, zinc dialkyldithiophosphates, VI improvers, pour point depressants, antioxidants, and friction modifiers.
6. The composition of claim 1 further comprising at least one member selected from the group consisting of zinc dialkyldithiophosphates, zinc diaryldithiophosphates, and mixtures thereof.
7. The composition of claim 1 further comprising at least one additive selected from the group consisting of alkylated diphenylamines, hindered alkylated phenols, hindered alkylated phenolic esters, and molybdenum dithiocarbamates.
8. The composition of claim 1 wherein the 5-hydrocarbyl-2-mercapto-1,3,4-oxadiazole compound is 5-oleyl-2-mercapto-1,3,4-oxadiazole.
9. The composition of claim 1 wherein the lubricant is a lubricating oil.
10. The composition of claim 9 wherein R 1 is a functionalized hydrocarbon of from 1 to 22 carbon atoms.
11. The composition of claim 10 wherein R 1 is based on a fatty acid or mixture of fatty acids.
12. The composition of claim 9 further comprising at least one additive selected from the group consisting of dispersants, detergents, corrosion/rust inhibitors, zinc dialkyldithiophosphates, VI improvers, pour point depressants, antioxidants, and friction modifiers.
13. The composition of claim 9 further comprising at least one member selected from the group consisting of zinc dialkyldithiophosphates, zinc diaryldithiophosphates, and mixtures thereof.
14. The composition of claim 9 further comprising at least one additive selected from the group consisting of alkylated diphenylamines, hindered alkylated phenols, hindered alkylated phenolic esters, and molybdenum dithiocarbamates.
15. The composition of claim 9 wherein the 5-hydrocarbyl-2-mercapto-1,3,4-oxadiazole compound is 5-oleyl-2-mercapto-1,3,4-oxadiazole.
16. A composition comprising:
(A) a lubricant, and
(B) at least one 5-hydrocarbyl-2-mercapto-1,3,4-oxadiazole compound of the formula:
wherein R 1 is a functionalized hydrocarbon of from 1 to 30 carbon atoms.
17. The composition of claim 16 wherein the lubricant is a lubricating oil.