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Lubricating composition based on aminated compounds

a technology of aminated compounds and lubricating compositions, applied in the field of lubricants, can solve the problems of limited use of phenolic compounds in lubricant compositions, metal carriers and sulphur, zinc thiophosphates, etc., and achieve the effects of improving oxidation resistance and fuel economy properties, satisfying antioxidant and anti-wear properties, and being easy to implemen

Inactive Publication Date: 2016-01-07
TOTAL MARKETING SERVICES SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is about a lubricant that has excellent properties in preventing wear and tear, improving fuel economy, and fighting oxidation. This patent also describes a method for using this lubricant.

Problems solved by technology

In fact, the major drawback of zinc thiophosphates is that they are carriers of metals and comprise sulphur, which is not desirable in lubricants with a low sulphated ash content, a low phosphorus content and a low sulphur content, commonly called “low sap” lubricants.
Moreover, the use of phenolic compounds could be limited in lubricant compositions, due to the potential risks of these compounds to human health, in particular through their toxicity, persistence and bioaccumulation by the organism.
As for the aromatic amines, their antioxidant effectiveness is recognized for low-temperature use of a lubricant composition, thus reducing their usefulness under high-temperature conditions corresponding to the operating conditions of an engine.
As a result, the engines of these vehicles are subject to increasingly stringent technical constraints: in particular they run more quickly, at increasingly high temperatures, and are required to consume less and less fuel.
However, these compounds have the drawback of causing the formation of sediments when the lubricant composition has too high a content of elemental molybdenum.
The poor solubility of some of these compounds modifies, or even degrades the properties of the lubricant composition, in particular its viscosity.
Now, a composition which is too viscous or not viscous enough militates against the movement of the mobile parts, easy starting of an engine, the protection of an engine when it has reached its operating temperature, and therefore ultimately causes in particular an increase in fuel consumption.
Furthermore, these molybdenum dithiocarbamates contribute to increasing the ash content, reducing their potential for use in a lubricant composition, in particular in Europe.
Now, compounds comprising an ammonium function, when added to a lubricant composition, present a potential risk of thickening the composition, thus being able to alter the lubrication properties of the composition.
Moreover, the combination of antioxidants and friction modifiers in a lubricant composition does not necessarily guarantee that satisfactory antioxidant and anti-wear properties will be obtained, due to the fact that these compounds can potentially neutralize each other.

Method used

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  • Lubricating composition based on aminated compounds
  • Lubricating composition based on aminated compounds
  • Lubricating composition based on aminated compounds

Examples

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example 1

Evaluation of the Antioxidant Properties of Lubricant Compositions According to the Invention

[0135]The antioxidant properties of lubricant compositions according to the invention were evaluated, subjected to a high temperature and in the presence of a metal salt as catalyst, based on the method below: A control lubricant composition was prepared according to Table I; the percentages indicated are percentages by mass.

TABLE IControl composition AGroup III base oils65.6%Polyalphaolefin (Spectrasyn 1000 261  3%marketed by the Exxon company)Polyalphaolefin with a kinematic15.2%viscosity equal to 6 cSt at 100° C. andaverage molecular mass equal to 470DaltonsEthylene / propylene copolymer 2.2%(LZ7077 marketed by the Lubrizolcompany)Branched paraffins 0.2%(LZ7716 marketed by the Lubrizolcompany)Additive package: dispersants (62.1%13.8%active material (AM)), calciumsulphonate (4.1% AM), calciumphenates (3.5% AM), aromatic amineantioxidant (5.2% AM), phenolicantioxidant (13.7% AM), zincdithioph...

example 2

Evaluation of the Coefficient of Friction of Lubricant Compositions According to the Invention

[0144]A lubricant composition D (comparative) was prepared according to Table IV; the percentages indicated are percentages by mass.

TABLE IVD(Comparative)Control composition A99.5%Friction modifier = glycerol0.5%linoleate (100% AM)

[0145]The coefficient of friction of each composition was evaluated by a Cameron Plint laboratory friction test using a reciprocating tribometer of the Cameron-Plint TE-77 type. The test bench is constituted by a cylinder-on-flat tribometer immersed in the lubricant composition to be tested. The coefficient of friction is monitored throughout the test by measuring the tangential force over the normal force. A cylinder (SKF 100C6) having a length of 10 mm and diameter 7 mm is applied onto the steel flat immersed in the lubricant composition to be tested; the temperature of the lubricant composition is set at each test. A sinusoidal reciprocating movement is applied...

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Abstract

A lubricant composition includes at least one base oil and at least one amine compound. The lubricant composition simultaneously has good anti-wear and fuel economy properties as well as good antioxidant properties.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a National Phase Entry of International Application Serial No. PCT / EP2014 / 053080, filed on Feb. 18, 2014, which claims priority to French Patent Application Serial No. 13 51 410, filed on Feb. 19, 2013, both of which are incorporated by reference herein.BACKGROUND AND SUMMARY[0002]The present invention relates to the field of lubricants. More particularly, the present invention relates to a lubricant composition comprising at least one amine compound. The lubricant composition according to the invention has, simultaneously, good anti-wear and fuel economy properties as well as good antioxidant properties. The present invention also relates to a method utilizing this composition.[0003]The present invention also relates to a method for reducing the fuel consumption of a vehicle utilizing this lubricant composition. The present invention also relates to a method for reducing the oxidation of a lubricant composition by the...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C10M141/10
CPCC10M141/10C10M133/16C10M2203/102C10M2203/1025C10M2205/022C10M2205/028C10M2205/0285C10M2207/026C10M2207/028C10M2215/064C10M2215/08C10M2219/044C10M2219/046C10M2223/045C10N2030/06C10N2030/10C10N2030/54C10N2040/04C10N2040/25C10M2205/024C10N2010/04C10N2020/02
Inventor IOVINE, RAPHAELEPIZARD, CARINE
Owner TOTAL MARKETING SERVICES SA