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Lubricating Oil Composition

a technology of lubricating oil and composition, which is applied in the direction of additives, petroleum industry, liquid carbonaceous fuels, etc., can solve the problems that known friction modifiers such as glycerol monoesters may not be able to meet those requirements at moderate treat rates, and achieve the effect of improving the performance of compounds

Inactive Publication Date: 2011-06-02
ANDREWS MARK D
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0006]The present invention meets the above problem by providing, as crankcase lubricant friction modifiers, certain organic acid anhydrides carrying aliphatic hydrocarbyl groups. In contrast to the anhydrides of '662, the hydrocarbyl groups are linear (i.e. unbranched). The data in this specification demonstrate solution of the technical problem in the prior art and enhanced performance of compounds with linear substituent groups as opposed to branched substituent groups.

Problems solved by technology

Known friction modifiers such as glycerol monoesters may not be able to meet those requirements at moderate treat rates.

Method used

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  • Lubricating Oil Composition
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examples

[0087]The invention will now be particularly described in the following examples which are not intended to limit the scope of the claims hereof.

[0088]The following friction modifiers were tested:—

[0089]n-octadecen-2-yl succinic anhydride (“nODSA”),

[0090]n-octadecyl succinic anhydride (“2H-nODSA”),

[0091]n-iso-octadecen-2-yl succinic anhydride (“isoODSA”),

[0092]polyisobutene succinic anhydride (C17 straight chain) (“PIBSA”),

[0093]Each of the nODSA, 2H-nODSA and isoODSA were commercially available materials. PIBSA was made by known methods.

[0094]Each of the above friction modifiers was blended separately into a lubricating oil composition (Oil A) at a treat rate of 0.5 wt % to give a set of test lubricants. Apart from the identity of the friction modifier, each lubricant was the same and comprised an adpack consisting of detergents, antifoam, dispersants, antioxidant and diluent blended with a viscosity modifier, pour point depressant, base stock and the friction modifier.

Testing and R...

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Abstract

A crankcase lubricating oil composition comprising (A) an oil of lubricating viscosity; and (B) as an additive component one or more oil-soluble organic acid anhydrides, the or each anhydride carrying at least one linear (unbranched) aliphatic hydrocarbyl substituent having 12 to 36 carbon atoms.

Description

FIELD OF THE INVENTION[0001]The present invention relates to automotive lubricating oil compositions, more especially to automotive lubricating oil compositions for use in piston engines, especially gasoline (spark-ignited) and diesel (compression-ignited) crankcase lubrication, such compositions being referred to as crankcase lubricants. In particular, although not exclusively, the present invention relates to use of additives with friction modification properties in automotive lubricating oil compositions.BACKGROUND OF THE INVENTION[0002]A crankcase lubricant is an oil used for general lubrication in an internal combustion engine where an oil sump is situated generally below the crankshaft of the engine and to which circulated oil returns. It is well known to include additives in crankcase lubricants for several purposes.[0003]Friction modifiers, also referred to as friction-reducing agents, may be boundary additives that operate by lowering friction coefficient and hence improve ...

Claims

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Application Information

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IPC IPC(8): C10M129/16
CPCC10M129/38C10M129/42C10M169/04C10M2207/125C10N2240/10C10M2207/129C10N2230/06C10N2230/10C10M2207/127C10N2030/06C10N2030/10C10N2040/25
Inventor ANDREWS, MARK D.
Owner ANDREWS MARK D