Lubricating composition containing lewis acid reaction product

Patent metadata

Field	Value
Publication number	US-9868919-B2
Application number	US-201414774733-A
Country	US
Kind code	B2
Filing date	Mar 5, 2014
Priority date	Mar 12, 2013
Publication date	Jan 16, 2018
Grant date	Jan 16, 2018

Abstract

The invention provides a lubricating composition comprising: an oil of lubricating viscosity and a reaction product of a monovalent to tetravalent inorganic Lewis acid and a hydroxyl terminated polyether (or glycol), wherein the mole ratio of hydroxyl terminated polyether (or glycol) to Lewis acid is 1:1 or greater. The invention further relates to a method of lubricating a mechanical device (such as an internal combustion engine) with the lubricating composition.

First claim

What is claimed is:

1. A lubricating composition comprising;
a. an oil of lubricating viscosity, and
b. a reaction product of a Lewis acid comprising a tetravalent D-block transition metal and a hydroxyl terminated polyether, wherein the mole ratio of the hydroxyl terminated polyether to the inorganic Lewis acid is 1:1 or greater.

2. The lubricating composition of claim 1 wherein the reaction product is represented by the formula M x (PE) n L m wherein:
M is the inorganic Lewis acid,
x is 1,
PE is selected from the group consisting of a hydroxide terminated polyether, an alkoxide terminated polyether and blends thereof,
n is 1 to 4,
L is selected from the group consisting of hydrocarbyl alcohols, hydrocarbyl alkoxides, hydroxides, halides, hydrocarbyl carboxylates and nitrates, and
m is 4-n.

3. The lubricating composition of claim 2 , wherein M comprises at least one of titanium, chromium, iron, copper, or zinc.

4. The lubricating composition of claim 1 , wherein the reaction product is present at 0.05 wt % to 5 wt % of the lubricating composition.

5. The lubricating composition of claim 1 , wherein the hydroxyl terminated polyether is a homopolymer or a copolymer.

6. The lubricating composition of claim 5 wherein the hydroxyl terminated polyether is a copolymer comprising (i) 0.1 wt % to 80 wt % with respect to the hydroxyl terminated polyether of ethylene glycol or its oxide, and (ii) 20 wt % to 99.9 wt % of an alkylene glycol or its oxide containing 3 to 8 carbon atoms.

7. The lubricating composition of claim 1 , wherein the hydroxyl terminated polyether is a copolymer according to Formula I:

wherein:
R 3 is hydrogen (H), —R 6 OH, —R 6 NH 2 , —(C═O)R 6 , —R 6 —N(H)C(═O)R 6 , or a hydrocarbyl group of from 1 to 30, or 1 to 20, or 1 to 15 carbon atoms,
each R 4 is independently selected from H, or a hydrocarbyl group of from 1 to 10 carbon atoms,
each R 5 is independently selected from a straight or branched hydrocarbyl group of from 1 to 6 carbon atoms,
R 6 is a hydrocarbyl group of 1 to 20 carbon atoms,
Y is —NR 7 R 8 , —OH, —R 6 NH 2 or —R 6 OH,
R 7 , and R 8 , independently, is H, or a hydrocarbyl group of from 1 to 50 carbon atoms in which up to one third of the carbon atoms is substituted by N or functionalized with additional polyether of Formula I, and
m is an integer from 2 to 50,
with the proviso that at least one of R 3 or Y is selected to form a terminal hydroxyl group.

8. The lubricating composition of claim 1 further comprising a corrosion inhibitor.

9. The lubricating composition of claim 8 , wherein the corrosion inhibitor comprises a sulphur-containing corrosion inhibitor.

10. The lubricating composition of claim 9 , wherein the sulphur-containing corrosion inhibitor comprises an ashless thiocarbamate compound having an optionally-substituted hydrocarbyl group on an S-atom and an optionally-substituted hydrocarbyl group on an N-atom.

11. The lubricating composition of claim 10 , wherein the sulphur-containing corrosion inhibitor comprises an ashless thiocarbamate compound having an optionally-substituted hydrocarbyl group on an S-atom and an optionally-substituted hydrocarbyl group on an N-atom represented by the formula:

wherein
n is 1 or 2;
W is oxygen or sulphur, provided that when n=1, W is sulphur, and when n=2, at least one W is sulphur;
R 9 is an optionally-substituted hydrocarbyl group, with the proviso that R 9 is free of a nitrogen-containing heterocycle; and
R 10 is an optionally-substituted hydrocarbyl group or an optionally-substituted hydrocarbylene group.

12. The lubricating composition of claim 8 , wherein the corrosion inhibitor is present at 0.01 wt % to 5 wt % of the lubricating composition.

13. The lubricating composition of claim 1 , further comprising an overbased detergent.

14. The lubricating composition of claim 13 , further comprising a sulphur-containing corrosion inhibitor, wherein the sulphur-containing corrosion inhibitor comprises an ashless thiocarbamate compound having an optionally-substituted hydrocarbyl group on an S-atom and an optionally-substituted hydrocarbyl group on an N-atom.

15. The lubricating composition of claim 3 , wherein M comprises titanium.

Assignees

• Lubrizol Corp

Inventors

• Delbridge Ewan E
• Zhang Yanshi
• Kocsis Jody A

Classifications

• C10M2219/066

  Thiocarbamic type compounds · CPC title

• C10M159/18

  Complexes with metals · CPC title

• C10M2207/026

  with tertiary alkyl groups · CPC title

• C10M2215/28

  Amides; Imides · CPC title

• C10M159/12 Primary

  Reaction products · CPC title