Functionalized olefin copolymers with monoamine terminated polyether and lubricating oil compositions

Patent metadata

Field	Value
Publication number	US-9487731-B2
Application number	US-201514930727-A
Country	US
Kind code	B2
Filing date	Nov 3, 2015
Priority date	Dec 29, 2011
Publication date	Nov 8, 2016
Grant date	Nov 8, 2016

Abstract

A method for is disclosed for improving diesel engine wear by lubricating the engine with a composition comprising an oil of lubricating viscosity and based upon the total composition of the lubricating oil composition from about 0.1 to about 2.0 weight % actives of a reaction product of an ethylene-alpha olefin copolymer acylated with maleic anhydride having a number average molecular weight from 5,000 to 120,000 and a hydrocarbyl-substituted poly(oxyalkylene) monoamine represented by the formula: R 1 —(OCH 2 CH 2 ) f —(OCH 2 CHR 4 ) g —NHR 5 wherein R 1 a hydrocarbyl group having from about 1 to about 35 carbon atoms; R 4 is independently hydrogen or methyl for each repeat unit g; R 5 is hydrogen or alkyl from 1 to 10 carbon atoms; and f and g are integers such that f+g is from 2 to 45 and wherein R 4 is selected to have a plurality of ethylene oxide in the polyoxyalkylene moiety.

First claim

What is claimed is:

1. A method for improving diesel engine wear by lubricating the engine with a composition comprising an oil of lubricating viscosity and based upon the total composition of the lubricating oil composition from about 0.1 to about 2.0 weight % actives of a reaction product of an ethylene-alpha olefin copolymer acylated with maleic anhydride having a number average molecular weight from 5,000 to 120,000 and a hydrocarbyl-substituted poly(oxyalkylene) monoamine represented by the formula:

wherein:
R 1 a hydrocarbyl group having from about 1 to about 35 carbon atoms;
R 4 is independently hydrogen or methyl for each repeat unit g;
R 5 is hydrogen or alkyl from 1 to 10 carbon atoms; and
f and g are integers such that f+g is from 2 to 45 and wherein R 4 is selected to have a plurality of ethylene oxide in the polyoxyalkylene moiety.

2. The method of claim 1 , wherein the ethylene-alpha olefin copolymer comprises from 35 to less than 60 weight % ethylene and greater than 40 up to 65 weight % of at least one C 3 to C 28 alpha olefins.

3. The method of claim 2 , wherein the ethylene-alpha olefin copolymer comprises from 45 to less than 55 weight % ethylene and greater than 45 up to 55 weight % of at least one C 3 to C 12 alpha olefins.

4. The method of claim 2 , wherein the at least one C 3 to C 28 alpha olefins is selected from the group comprising C 3 to C 8 alpha olefins.

5. The method of claim 1 , wherein the ethylene-alpha olefin copolymer comprises from 10 to less than 20 weight % ethylene and greater than 80 up to 90 weight % of propylene.

6. The method of claim 1 , wherein the ethylene-alpha olefin copolymer further comprises a nonconjugated diene or triene.

7. The method of claim 1 , wherein the ethylene-alpha olefin copolymer is grafted with 0.6 to 3 weight % of maleic anhydride.

8. The method of claim 1 , wherein R 1 is selected from the group consisting of alkyl, aryl, alkyaryl, arylalkyl, and arylalkylaryl.

9. The method of claim 8 , wherein R 1 is alkyl from 1-10 carbon atoms.

10. The method of claim 9 , wherein R 1 is selected from the group consisting of methyl, ethyl, propyl, and butyl.

11. The method of claim 8 , wherein R 1 is selected from the group consisting phenyl, naphthyl, alkylnapthyl and substituted phenyl having one to three substituents selected from alkyl, aryl, alkylaryl, and arylalkyl.

12. The method of claim 8 , wherein R 1 is selected from the group consisting of phenyl, alkylphenyl, naphthyl, and alkylnaphthyl.

Assignees

• Chevron Oronite Co

Inventors

• Ruhe Jr William Raymond

Classifications

• C10N2020/019

  Shear stability · CPC title

• C10N2020/02

  Viscosity; Viscosity index · CPC title

• C10M133/06

  having amino groups bound to acyclic or cycloaliphatic carbon atoms · CPC title

• C10N2020/04

  Molecular weight; Molecular weight distribution · CPC title

• C10M2223/045

  Metal containing thio derivatives · CPC title