Lubricants containing amine salt of acid phosphate and hydrocarbyl borate

1. A lubricating oil composition comprising:

a) greater than 50 wt. % of a base oil;

b) 0.01 wt. % to 10 wt. % of a reaction product of a hydrocarbyl acid phosphate of the formula (I), based on the total weight of the lubricating oil composition:

wherein R is a hydrocarbyl group having 1 to 20 carbon atoms and R 1 is selected from hydrogen and a hydrocarbyl group having 1 to 20 carbon atoms, and

a nitrogen containing compound selected from:

i) an oil soluble amine of the formula (II):

wherein R 2 and R 3 are each independently selected from hydrogen or a hydrocarbyl group having from 1 to 20 carbon atoms, and R 4 is a hydrocarbyl group having 1 to 20 carbon atoms; and

ii) an oil soluble amine of the formula (III):

wherein R 5, R 6, R 7, R 8, and R 11 are each independently selected from hydrogen and a hydrocarbyl group containing from 1 to 160 carbon atoms;

R 9 and R 10 are independently selected from hydrocarbylene groups containing from 2 to 20 carbon atoms; n is an integer of from 0 to 20 and when n>1, each R 10 can be the same or different and each R 11 can be the same or different; and

iii) a hydrocarbyl-substituted succinimide;

c) an oil soluble hydrocarbyl borate of the formula (IV):

wherein R 12 , R 13 , and R 14 are each independently selected from a hydrocarbon group containing from 1 to 20 carbon atoms, and wherein the hydrocarbyl borate of the formula (IV) contains at least 6 carbon atoms,

wherein a molar ratio of moles of phosphorus contributed by component b) to moles of boron contributed by component c) is from 1:1 to 10:1.

2. The lubricating oil composition of claim 1 , wherein a molar ratio of moles of phosphorus contributed by component b) to moles of boron contributed by component c) is from 1.3:1 to 6:1.

3. The lubricating oil composition of claim 1 , wherein a molar ratio of moles of phosphorus contributed by component b) to moles of boron contributed by component c) is from 1.4:1 to 5.75:1.

4. The lubricating oil composition of claim 1 , wherein R 12 , R 13, and R 14 are independently selected from linear alkyl, branched, alkyl, and cycloalkyl.

5. The lubricating oil composition of claim 1 , wherein the hydrocarbyl acid phosphate is employed to make component (b) in an amount of from 0.01 wt. % to 5 wt. %, based on the total weight of the lubricating oil composition.

6. The lubricating oil composition of claim 1 , wherein the hydrocarbyl acid phosphate is employed to make component (b) in an amount of from 0.1 wt. % to 2 wt. %, based on the total weight of the lubricating oil composition.

7. The lubricating oil composition of claim 1 , wherein the hydrocarbyl borate (c) is selected from triethyl borate and tributyl borate.

8. The lubricating oil composition of claim 1 , wherein the hydrocarbyl acid phosphate is selected from the group consisting of amyl acid phosphate, methyl acid phosphate, hexyl acid phosphate, and 2-ethyl hexyl acid phosphate.

9. The lubricating oil composition of claim 1 , wherein the hydrocarbyl acid phosphate is selected from the group consisting of amyl acid phosphate, methyl acid phosphate, and hexyl acid phosphate.

10. The lubricating oil composition of claim 1 , wherein the nitrogen containing compound is an amine of the formula (II) and contains at least 8 carbon atoms.

11. The lubricating oil composition of claim 1 , wherein the reaction product (b) is present in an amount of from 0.1 wt. % to 5 wt. %.

12. The lubricating oil composition of claim 1 , wherein the reaction product (b) is present in an amount of from 0.5 wt. % to 4 wt. %.

13. The lubricating oil composition of claim 1 , wherein the reaction product (b) is present in an amount of from 0.75 wt. % to 3.75 wt. %.

14. The lubricating oil composition of claim 1 , wherein component b) is present in an amount to contribute from 50 ppm to 1500 ppm of phosphorus, based on the total weight of the lubricating oil composition.

15. The lubricating oil composition of claim 1 , wherein component b) is present in an amount to contribute from 300 to 1500 ppm phosphorus, based on a total weight of the lubricating oil composition.

16. The lubricating oil composition of claim 1 , wherein component b) is present in an amount to contribute from 900 to 1200 ppm phosphorus, based on a total weight of the lubricating oil composition.

17. The lubricating oil composition of claim 1 , wherein component c) is present in an amount to contribute from 5 ppm to 400 ppm of boron, based on the total weight of the lubricating oil composition.

18. The lubricating oil composition of claim 1 , wherein component c) is present in an amount to contribute from 55 ppm to 375 ppm of boron, based on the total weight of the lubricating oil composition.

19. The lubricating oil composition of claim 1 , wherein a molar ratio of the acid phosphate component to the nitrogen containing compound of from 0.2:0.8 is employed to make the component b).

20. The lubricating oil composition of claim 1 , wherein a molar ratio of the acid phosphate component to the nitrogen containing compound of from 0.4:0.7 is employed to make the component b).

21. The lubricating oil composition of claim 1 , wherein R is a hydrocarbyl group comprising from 1 to 10 carbon atoms and R 1 is selected from hydrogen and a hydrocarbyl group comprising from 1 to 10 carbon atoms.

22. The lubricating oil composition of claim 1 , wherein R is a hydrocarbyl group comprising from 1 to 6 carbon atoms, and R 1 is selected from hydrogen and a hydrocarbyl group comprising from 1 to 10 carbon atoms.

23. The lubricating oil composition of claim 1 , wherein R is a hydrocarbyl group having from 1 to 6 carbon atoms and R 1 is hydrogen.

24. The lubricating oil composition of claim 1 , wherein the nitrogen containing compound is an amine of the formula (II) wherein R 2 is hydrogen.

25. The lubricating oil composition of claim 1 , wherein the nitrogen containing compound is an amine of the formula (II) wherein R 2 and R 3 are hydrogen.

26. The lubricating oil composition of claim 1 , wherein the nitrogen containing compound is an amine of the formula (III), n=0, and R 9 is a hydrocarbylene group comprising from 2 to 20 carbon atoms.

27. The lubricating oil composition of claim 1 , wherein the nitrogen containing compound is an amine of the formula (III), n is from 2 to 5, R 5 -R 8 and R 11 are hydrogen, and R 9 and R 10 are hydrocarbylene groups comprising 2 carbon atoms.

28. The lubricating oil composition of claim 1 , wherein the nitrogen containing compound is selected from component iii) and is selected from the group consisting of mono-alkenylsuccinimides, bis-alkenylsuccinimides, and polyisobutylene succinimides.

29. The lubricating oil composition of claim 28 , wherein the nitrogen containing compound is a mono-alkenylsuccinimide prepared by reacting an octadecenyl succinic anhydride and tetraethylenepentamine.

30. The lubricating oil composition of claim 1 , wherein the base oil is selected from a Group IV base oil, a Group V base oil and a mixture of a Group IV base oil and a Group V base oil.

31. The lubricating oil composition of claim 1 , further comprising an ashless dispersant.

32. The lubricating oil composition of claim 31 , wherein the ashless dispersant is borated and/or phosphorylated.

33. The lubricating oil composition of claim 1 , further comprising one or more of the optional components selected from the group consisting of detergents, corrosion inhibitors, antioxidants, viscosity modifiers and friction modifiers.

34. The lubricating oil composition of claim 1 , wherein the lubricating composition is a transmission fluid.

35. The lubricating oil composition of claim 1 , wherein the lubricating oil composition is a gear oil.

36. A method for reducing gear scuffing in a transmission comprising a step of lubricating said transmission with the lubricating oil composition as claimed in claim 1 .