Additive compositions with a friction modifier and a metal dialkyl dithio phosphate salt

Patent metadata

Field	Value
Publication number	US-9499761-B2
Application number	US-201213725290-A
Country	US
Kind code	B2
Filing date	Dec 21, 2012
Priority date	Dec 21, 2012
Publication date	Nov 22, 2016
Grant date	Nov 22, 2016

Abstract

A lubricating composition comprising a major amount of base oil and a minor amount of an additive package, wherein the additive package comprises: (A) a friction modifier component selected from:
(a) one or more a reaction products of an alcohol with a compound of the formula IV:

and
(b) one or more compounds of the Formulae II-III:

wherein R is a linear or branched, saturated, unsaturated, or partially saturated hydrocarbyl having about 8 to about 22 carbon atoms; R 2 and R 3 are independently selected from hydrogen, C 1 -C 18 hydrocarbyl groups, and C 1 -C 18 hydrocarbyl groups containing one or more heteroatoms; and X is an alkali metal, alkaline earth metal, or ammonium cation and n is the valence of cation X; and
(B) at least one metal dialkyl dithio phosphate salt.

First claim

What is claimed is:

1. An engine oil composition comprising a major amount of a base oil having at least 90% saturates and being selected from a Group II, Group III, Group IV and Group V base oil and mixtures thereof, and a minor amount of an additive package, wherein the additive package comprises:
(A) a friction modifier component selected from one or more compounds of the Formulae I-III:

wherein R is a linear or branched, saturated, unsaturated, or partially saturated hydrocarbyl having about 8 to about 22 carbon atoms and R 1 is hydrogen or a hydrocarbyl having from about 1 to about 8 carbon atoms, or a C 1 -C 8 hydrocarbyl group containing one or more heteroatoms;

wherein R is a linear or branched, saturated, unsaturated, or partially saturated hydrocarbyl having about 8 to about 22 carbon atoms and R 2 and R 3 are independently selected from hydrogen, C 1 -C 18 hydrocarbyl groups, and C 1 -C 18 hydrocarbyl groups containing one or more heteroatoms; and

wherein R is a linear or branched, saturated, unsaturated, or partially saturated hydrocarbyl having about 8 to about 22 carbon atoms; and X is an alkali metal, alkaline earth metal, or ammonium cation and n is the valence of cation X; and
(B) at least one metal dialkyl dithio phosphate salt; and
wherein the engine oil composition is adapted for use as an engine oil, the engine oil composition has a phosphorus content of 50-1000 ppm and the engine oil composition contains 0.1 to 2.0 wt. % of the friction modifier component (A), based on a total weight of the composition, and when the friction modifier component is a compound of the formula (III), the engine oil composition comprises a major amount of a base oil having at least 90% saturates and being selected from a Group II, Group III and Group IV base oil and mixtures thereof.

2. The engine oil composition of claim 1 , wherein the additive package comprises at least one compound of the formula I.

3. The engine oil composition of claim 1 , wherein the additive package comprises at least one compound of the formula II.

4. The engine oil composition of claim 1 , wherein the additive package comprises at least one salt of the formula III.

5. The engine oil composition of claim 1 , wherein the additive package comprises at least two different compounds independently selected from compounds of the formulae I-III.

6. The engine oil composition of claim 1 , wherein R has from about 10 to about 20 carbon atoms.

7. The engine oil composition of claim 1 , wherein R has from about 12 to about 18 carbon atoms.

8. The engine oil composition of claim 1 , wherein R 1 is hydrocarbyl group having from about 1 to about 8 carbon atoms.

9. The engine oil composition of claim 1 , wherein R 1 is a C 1 -C 8 hydrocarbyl group containing one or more heteroatoms.

10. The engine oil composition of claim 3 , wherein R 2 and R 3 are independently selected from hydrogen, C 1 -C 18 hydrocarbyl groups, and C 1 -C 18 hydrocarbyl groups containing one or more heteroatoms.

11. The engine oil composition of claim 3 , wherein R 2 and R 3 are independently selected from hydrogen and C 4 -C 8 hydrocarbyl groups.

12. The engine oil composition of claim 4 , wherein the one or more compounds of the formula III are salts of one or more cations selected from sodium, lithium, potassium, calcium, magnesium, and an amine.

13. The engine oil composition of claim 1 , wherein the additive package further comprises at least one additive selected from the group consisting of antioxidants, antifoam agents, molybdenum-containing compounds, titanium-containing compounds, phosphorus-containing compounds, viscosity index improvers, pour point depressants, and diluent oils.

14. The engine oil composition of claim 1 , comprising at least two metal dialkyl dithio phosphate salts.

15. The engine oil composition of claim 1 , wherein the metal of the metal dialkyl dithio phosphate salt is selected from the group consisting of alkali metals, alkaline earth metals, aluminum, lead, tin, molybdenum, manganese, nickel, copper, titanium and zinc.

16. The engine oil composition of claim 1 , wherein the alkyl groups on the metal dialkyl dithio phosphate salts contain from 1 to 18 carbon atoms.

17. The engine oil composition of claim 16 , wherein the alkyl groups of the at least one metal dialkyl dithio phosphate salt are independently selected from ethyl, n-propyl, i-propyl, n-butyl, i-butyl, sec-butyl, amyl, n-hexyl, i-hexyl, n-octyl, decyl, dodecyl, octadecyl, 2-ethylhexyl, phenyl, butylphenyl, cyclohexyl, methylcyclopentyl, propenyl, and butenyl.

18. The engine oil composition of claim 16 , wherein one metal dialkyl dithio phosphate salt is solely derived from primary alcohols and one metal dialkyl dithio phosphate salt is derived solely from secondary alcohols.

19. The engine oil composition of claim 18 , wherein the all primary alcohol metal dialkyl dithio phosphate salt and the all secondary alcohol metal dialkyl dithio phosphate salt are mixed together in a ratio of about 30:70 to about 70:30.

20. The engine oil composition of claim 1 , wherein the at least one metal dialkyl dithio phosphate salt comprises at least one zinc dialkyl dithio phosphate represented by the following formula:

wherein R 5 and R 6 may be the same or different hydrocarbyl moieties containing from 1 to 18 carbon atoms.

21. An engine oil composition comprising a major amount of base oil having at least 90% saturates and being selected from a Group II, Group III, Group IV and Group V base oil and mixtures thereof, and a minor amount of an additive package, wherein the additive package comprises:
(A) one or more amide reaction products of a compound of the formula IV:

wherein R is a linear or branched, saturated, unsaturated, or partially saturated hydrocarbyl group having about 8 to about 22 carbon atoms, and an amine of the formula V:

wherein R 2 , R 3 , and R 4 are independently selected from hydrogen, C 1 -C 18 hydrocarbyl groups, and hydrocarbons containing C 3 -C 12 hydrocarbyl groups and one or more heteroatoms; and
(B) at least one metal dialkyl dithio phosphate salt; and
wherein the engine oil composition is adapted for use as an engine oil, the engine oil composition has a phosphorus content of 50-1000 ppm and the engine oil composition contains 0.1 to 2 wt. % of the friction modifier component (A), based on the total weight of the composition.

22. An engine oil composition comprising a major amount of a base oil having at least 90% saturates and being selected from a Group II, Group III, Group IV and Group V base oil and mixtures thereof, and a minor amount of an additive package, wherein the additive package comprises:
(A) one or more salts that are reaction products of one or more compounds of the formula IV:

Assignees

• Afton Chemical Corp

Inventors

• Loper John T
• Styer Jeremy P

Classifications

• C10N2010/14

  Group 7 · CPC title

• C10N2040/25

  Internal-combustion engines · CPC title

• C10N2040/02

  Bearings · CPC title

• C10N2010/04

  Groups 2 or 12 · CPC title

• C10N2030/56

  Boundary lubrication or thin film lubrication · CPC title