# US 8,785,357 B2 · Composition containing heterocyclic compounds and a method of lubricating an internal combustion engine

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- Number: US 8,785,357 B2
- Document ID: US8785357B2
- Status: Granted
- Kind: B2
- Application number: 13/060,492
- Filed: 2009-09-14
- Published: 2011-08-04
- Granted: 2014-07-22
- Earliest claimed: 2008-09-16
- Assignees: The Lubrizol Corporation
- Applicants: Patrick E. Mosier; Jason R. Brown; Matthew D. Gieselman; Calvin W. Schroeck; Seth Crawley; William Barton; William C. Ward
- Inventors: Patrick E. Mosier; Jason R. Brown; Matthew D. Gieselman; Calvin W. Schroeck; Seth Crawley; William Barton; William C. Ward
- Web page: https://patentgrep.com/patent/US8785357B2

## CPC

- C10M 133/40: Six-membered ring containing nitrogen and carbon only
- C10M 129/20: Cyclic ethers having 4 or more ring atoms, e.g. furans, dioxolanes
- C10M 133/44: Five-membered ring containing nitrogen and carbon only
- C10M 133/46: Imidazoles
- C10M 133/48: the ring containing both nitrogen and oxygen
- C10M 133/58: Heterocyclic compounds
- C10M 159/12: Reaction products
- C10M 2205/022: Ethene
- C10M 2205/04: containing aromatic monomers, e.g. styrene
- C10M 2207/028: Overbased salts thereof
- C10M 2207/044: Cyclic ethers having four or more ring atoms, e.g. furans, dioxolanes
- C10M 2207/262: derived from hydroxy substituted aromatic acids, e.g. salicylates
- C10M 2215/064: Di- and triaryl amines
- C10M 2215/221: Six-membered rings containing nitrogen and carbon only
- C10M 2215/223: Five-membered rings containing nitrogen and carbon only
- C10M 2215/224: Imidazoles
- C10M 2215/225: the rings containing both nitrogen and oxygen
- C10M 2215/28: Amides; Imides
- C10M 2219/046: Overbased sulfonic acid salts
- C10M 2223/045: Metal containing thio derivatives
- C10N 2020/019: {Shear stability}
- C10N 2030/06: Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
- C10N 2030/42: {Phosphor free or low phosphor content compositions}
- C10N 2030/52: {Base number [TBN]}
- C10N 2040/251: {Alcohol-fuelled engines}
- C10N 2040/252: {Diesel engines}
- C10N 2040/253: {Small diesel engines}
- C10N 2040/255: {Gasoline engines}
- C10N 2040/26: Two-strokes {or two-cycle engines}
- C10M: LUBRICATING COMPOSITIONS (well drilling compositions C09K8/02); USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION (mould release, i.e. separating, agents for metals B22C3/00, for plastics or substances in a plastic state, in general B29C33/56, for glass C03B40/02; textile lubricating compositions D06M11/00, D06M13/00, D06M15/00; immersion oils for microscopy G02B21/33)
- C10N: INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS

## Abstract

The present Invention relates to the use of a compound in a lubricating composition as an engine oil antiwear and/or extreme pressure agent, wherein the compound is a heterocycle having a hydrocarbyl group containing 6 to 40 carbon atoms, wherein the heterocycle is either (i) a heterocycle compound having a functional group selected from the group consisting of at least one of an ester, an amide, a salt and an acid, or (ii) a pyrimidine.

## Claims

### Claim 1

A method for lubricating an internal combustion engine comprising supplying to the internal combustion engine a lubricating composition comprising an oil of lubricating viscosity and 0.2 to 5 wt % of a heterocycle having a hydrocarbyl group containing 6 to 40 carbon atoms, wherein the heterocycle compound has a functional group selected from the group consisting of at least one of an ester, an amide, a salt and an acid, and is represented by the formulae:
wherein the heterocycle is an aromatic compound represented by the formula:
wherein, independently, each variable
Y is —O—R4; and
R4 is a hydrocarbyl group containing 6 to 40 carbon atoms, wherein the internal combustion engine contains lubricated ferric components.

### Claim 2 (depends on 1)

The method of claim 1, wherein the hydrocarbyl group containing 6 to 40 carbon atoms is a linear or branched alkyl group.

### Claim 3 (depends on 1)

The method of claim 1, wherein the oil of lubricating viscosity comprises an API Group I, Group II, Group III, Group IV oil, or mixtures thereof.