Friction modifier system
This disclosure describes a lubricant additive. The additive is a friction modifier that includes a molybdenum containing compound and a tertiary amine-containing composition having the following structure: wherein each R 1 and R 5 is independently a linear or branched-chain monovalent hydrocarbyl group having one to about twenty carbon atoms, wherein each R 2 , R 3 , and R 4 is independently a hydrogen, a linear or branched-chain monovalent hydrocarbyl group having one to about twenty carbon atoms, each m is independently from 0 and 4, each p is independently from 0 and 4, for each cyclic moiety m+p is from 2 and 4, and each n is independently from 1 and 6.
1. A lubricating oil composition comprising:
a) major amount of a base oil; and
b) minor amount of a synergistic friction modifier composition comprising:
i) a molybdenum containing compound; and
ii) a tertiary amine-containing compound having the following structure:
wherein each R 1 and R 5 is independently a linear or branched-chain monovalent hydrocarbyl group having one to about twenty carbon atoms, wherein each R 2 , R 3 , and R 4 is independently a hydrogen, a linear or branched-chain monovalent hydrocarbyl group having one to about twenty carbon atoms, each m is independently from 0 to 4, each p is independently from 0 to 4, for each cyclic moiety m+p is from 2 to 4, and each n is independently from 1 to 6.
2. The lubricating oil composition of claim 1 , wherein the linear or branched-chain monovalent hydrocarbyl group is a branched C 12 to C 20 alkenyl group.
3. The lubricating oil composition of claim 1 , wherein the linear or branched-chain monovalent hydrocarbyl group is a branched C 18 to C 20 alkenyl group.
4. The lubricating oil composition of claim 1 , wherein the tertiary amine-containing additive is present in about 0.1 to 2 wt % by weight of the lubricating oil composition.
5. The lubricating oil composition of claim 1 , wherein the molybdenum containing compound is a molybdenum dithiocarbamate, molybdenum dithiophosphate, molybdenum carboxylate, molybdenum ester, molybdenum amine, or molybdenum amide.
6. The lubricating oil composition of claim 5 , wherein the molybdenum dithiocarbamate is given by the following structure:
wherein R 8 , R 9 , R 10 , and R 11 are each independently hydrogen or a hydrocarbon group including, by way of example, alkyl groups, alkenyl groups, aryl groups, cycloalkyl groups and cycloalkenyl groups, and X 1 , X 2 , X 3 and X 4 are each independently sulfur or oxygen.
7. The lubricating oil composition of claim 1 , wherein the molybdenum containing compound is present in the lubricating oil composition in concentration ranging from about 50 to about 1500 ppm.
8. A method of modifying friction comprising lubricating an engine with a lubricating oil comprising:
a) major amount of base oil; and
b) minor amount of a synergistic friction modifier composition comprising:
i) a molybdenum containing compound; and
ii) a tertiary amine-containing additive having the following structure:
wherein each R 1 and R 5 is independently a linear or branched-chain monovalent hydrocarbyl group having one to about twenty carbon atoms, wherein each R 2 , R 3 , and R 4 is independently a hydrogen, a linear or branched-chain monovalent hydrocarbyl group having one to about twenty carbon atoms, each m is independently from 0 to 4, each p is independently from 0 to 4, for each cyclic moiety m+p is from 2 to 4, and each n is independently from 1 to 6.
9. The method of claim 8 , wherein the linear or branched-chain monovalent hydrocarbyl group is a branched C 12 to C 20 alkenyl group.
10. The method of claim 8 , wherein the linear or branched-chain monovalent hydrocarbyl group is a branched C 18 to C 20 alkenyl group.
11. The method of claim 8 , wherein the tertiary amine-containing additive is present in about 0.1 to 2 wt % by weight of the lubricating oil composition.
12. The method of claim 8 , wherein the molybdenum containing compound is a molybdenum dithiocarbamate, molybdenum dithiophosphate, molybdenum carboxylate, molybdenum ester, molybdenum amine, or molybdenum amide.
13. The method of claim 12 , wherein the molybdenum dithiocarbamate is given by the following structure:
wherein R 8 , R 9 , R 10 , and R 11 are each independently hydrogen or a hydrocarbon group including, by way of example, alkyl groups, alkenyl groups, aryl groups, cycloalkyl groups and cycloalkenyl groups, and X 1 , X 2 , X 3 and X 4 are each independently sulfur or oxygen.
14. The method of claim 8 , wherein the molybdenum containing compound is present in the lubricating oil composition in concentration ranging from about 50 to about 1500 ppm.
15. A lubricating oil composition comprising:
a) major amount of a base oil;
b) a molybdenum containing compound; and
c) a product of a reaction comprising:
i) a hydrocarbyl-substituted succinic anhydride represented by the following structure:
wherein R 6 is a linear or branched-chain monovalent hydrocarbyl group having one to about twenty carbon atoms; and
ii) a cyclic polyamine represented by the following structure:
wherein R 7 is hydrogen or a linear or branched-chain monovalent hydrocarbyl group having one to about twenty carbon atoms, m is from 0 to 4, p is from 0 to 4, m+p is from 2 to 4, and n is from 1 to 6; and
wherein the hydrocarbyl-substituted succinic anhydride to cyclic polyamine ratio is from about 1.5:1 to about 1.6:1.
16. The lubricating oil composition of claim 15 , wherein the cyclic amine is aminoethyl piperazine, aminopropyl piperazine, aminobutyl piperazine, aminoethyl diazepane, or aminoethyl diazocane.
17. The lubricating oil composition of claim 15 , wherein the molybdenum containing compound is a molybdenum dithiocarbamate, molybdenum dithiophosphate, molybdenum carboxylate, molybdenum ester, molybdenum amine, or molybdenum amide.
18. The lubricating oil composition of claim 17 , wherein the molybdenum dithiocarbamate is given by the following structure:
wherein R 8 , R 9 , R 10 , and R 11 are each independently hydrogen or a hydrocarbon group including, by way of example, alkyl groups, alkenyl groups, aryl groups, cycloalkyl groups and cycloalkenyl groups, and X 1 , X 2 , X 3 and X 4 are each independently sulfur or oxygen.
19. The lubricating oil composition of claim 15 , wherein the molybdenum containing compound is present in the lubricating oil composition in concentration ranging from about 50 to about 1500 ppm.
20. The lubricating oil composition of claim 18 , wherein each R 8 , R 9 , R 10 and R 11 independently comprise 6 to 18 carbon atoms.