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Dispersant viscosity index improvers to enhance wear protection in engine oils

A viscosity index improvement, engine oil technology, applied in additives, petroleum industry, lubrication indicator devices, etc., can solve problems such as poor fuel economy

Active Publication Date: 2019-05-03
AFTON CHEMICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Fluids with relatively high HTHS viscosities typically exhibit poor fuel economy due to the formation of thicker oil films at the boundaries of engine surfaces during engine operation

Method used

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  • Dispersant viscosity index improvers to enhance wear protection in engine oils
  • Dispersant viscosity index improvers to enhance wear protection in engine oils
  • Dispersant viscosity index improvers to enhance wear protection in engine oils

Examples

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[0300] The following examples are illustrative and not limiting of the methods and compositions of the present disclosure. In the following examples, the effect of incorporating a dispersant viscosity index improver (DVII) in an engine oil composition on soot handling, wear protection, and sludge handling was determined. The DVII used in these examples is an amine functionalized olefin copolymer dispersant viscosity index improver comprising the reaction product of an acylated ethylene-propylene copolymer as described herein and a polyamine compound.

[0301] Table 3 summarizes the components used in Examples 1-6.

[0302] table 3

[0303]

[0304]

[0305] The engine oils of Examples 1-6 were tested using the OM646LA wear test to evaluate wear protection in the engine.

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Abstract

An engine oil composition including greater than 50 wt.% of a base oil of lubricating viscosity selected from a Group III, a Group IV or a Group V base oil, and mixtures thereof, 0.1-10 wt.% of a dispersant viscosity index improver that a reaction product of an olefin copolymer, an acylating agent and a polyamine, one or more calcium-containing detergents that provide from about 900 ppmw to about2500 ppmw of calcium to the engine oil composition, and one or more molybdenum-containing compounds. The engine oil composition has an SAE viscosity grade of OW-X or 5W-X, wherein X = 16, 20, 30, or 40; from about 500 ppmw to about 1000 ppmw of phosphorus; and a total sulfated ash content of no greater than 1.2 wt.%, as measured by ASTM D874. Methods of using the engine oil composition to lubricate or operate an engine are also described.

Description

technical field [0001] The present disclosure relates to engine oils containing multifunctional olefin copolymer viscosity index improvers. More specifically, engine oil compositions comprising multifunctional olefin copolymer viscosity index improvers can provide one or more of good thickening capability, excellent dispersibility, improved soot handling, wear protection, and piston cleanliness kind. Background technique [0002] In recent years, the emphasis on fuel economy has increased. One approach to improving vehicle fuel economy is to design new lubricating oils that reduce friction and have a lower high temperature high shear ("HTHS") viscosity while maintaining a film thickness sufficient for good durability. Attempts to improve fuel economy and reduce vehicle CO 2 Emissions, the use and regulation of low viscosity grades by Original Equipment Manufacturers (OEMs) are becoming more common. In Europe, some OEMs are considering 0W-xx and 5W-xx viscosity grades for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/04F01M11/10C10N30/02C10N30/06C10N40/25
CPCC10M169/04C10M159/12C10M2203/1025C10M2217/06C10N2010/12C10N2030/02C10N2010/04C10N2030/45C10N2040/252C10N2040/25C10M169/048C10M2205/022C10M2205/0285C10M2207/028C10M2219/046C10N2020/04C10N2030/04C10N2030/06C10N2030/40C10N2030/42C10N2040/253C10M2205/024C10N2020/02C10M169/045C10N2030/68
Inventor 保罗·兰塞姆纪尧姆·卡朋特
Owner AFTON CHEMICAL
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