Lubricating compositions containing salts of hydrocarbyl substituted acylating agents

Patent metadata

Field	Value
Publication number	US-9506006-B2
Application number	US-201214124894-A
Country	US
Kind code	B2
Filing date	Jun 18, 2012
Priority date	Jun 21, 2011
Publication date	Nov 29, 2016
Grant date	Nov 29, 2016

Abstract

The present invention provides a composition and a concentrate, comprising: (a) a major amount of an oil of lubricating viscosity, (b) a quaternary ammonium salt of a hydrocarbyl-substituted acylating agent condensation product, and (c) an optional amount of a succinimide dispersant different from (b), and a use of the composition or concentrate for lubricating an engine. In a further embodiment, the invention provides the use of a quaternary ammonium salt of a hydrocarbyl-substituted acylating agent condensation product as a dispersant in a lubricating composition, and as a synergistic dispersant combination with a different succinimide dispersant.

First claim

What is claimed is:

1. A composition comprising (a) a major amount of an oil of lubricating viscosity, (b) between 1 to 3 wt % on an oil-free basis of a quaternary ammonium salt comprising the reaction product of: (i) a polyisobutylene succinic anhydride and a compound having an oxygen or nitrogen atom capable of condensing with said polyisobutylene succinic anhydride, and further having a tertiary amino group; and (ii) a quaternizing agent suitable for converting the tertiary amino group to a quaternary nitrogen, wherein the quaternizing agent is selected from the group consisting of (i) organic carbonates; (ii) hydrocarbyl epoxides, (iii) mixtures of hydrocarbyl epoxides and acids, or (iv) mixtures of any of (i)-(iii), and (c) between 1 to 6 wt % on an oil-free basis of a succinimide dispersant comprising the reaction product of a polyisobutylene succinic anhydride and an alkylene polyamine.

2. The composition of claim 1 , wherein the compound having an oxygen or nitrogen atom of (i) is N 1 ,N 1 -dimethylpropane-1,3-diamine or 3-(dimethylamino)propan-1-ol.

3. The composition of claim 1 , wherein the compound having an oxygen or nitrogen atom of claim (i) is N 1 ,N 1 -dimethylpropane-1,3-diamine and the quaternizing agent of (ii) comprises a mixture of propylene oxide and hydroxybenzoic acid.

4. The composition of claim 1 , wherein the compound having an oxygen or nitrogen atom of (i) is 3-(dimethylamino)propan-1-ol and the quaternizing agent of (ii) comprises propylene oxide.

5. The composition of claim 1 wherein the alkylene polyamine is N 1 ,N 1 -dimethylpropane-1,3-diamine.

6. A concentrate suitable for dilution with oil of lubricating viscosity comprising (a) a major amount of an oil of lubricating viscosity, (b) a quaternary ammonium salt derivative comprising the reaction product of: (i) a polyisobutylene succinic anhydride and a compound having an oxygen or nitrogen atom capable of condensing with said polyisobutylene succinic anhydride, and further having a tertiary amino group; and (ii) a quaternizing agent suitable for converting the tertiary amino group to a quaternary nitrogen, wherein the quaternizing agent is selected from the group consisting of (i) organic carbonates; (ii) hydrocarbyl epoxides, (iii) mixtures of hydrocarbyl epoxides and acids, or (iv) mixtures of any of (i)-(iii), and (c a succinimide dispersant comprising the reaction product of a polyisobutylene succinic anhydride and an alkylene polyamine.

7. A method for lubricating a mechanical device comprising supplying thereto a composition according to claim 1 .

Assignees

• Jones Joanne L
• Thetford Dean
• Moreton David J
• Gieselman Matthew D
• Lubrizol Corp

Inventors

• Jones Joanne L
• Thetford Dean
• Moreton David J
• Gieselman Matthew D

Classifications

• C10N2030/04

  Detergent property or dispersant property · CPC title

• C10N2070/00

  Specific manufacturing methods for lubricant compositions · CPC title

• C10M2215/28

  Amides; Imides · CPC title

• C10M141/06 Primary

  at least one of them being an organic nitrogen-containing compound · CPC title

• C10M2215/26

  Amines · CPC title