Method of reducing the rate of depletion of basicity of lubricating oil composition in use in engine

A lubricating oil composition, engine technology, applied in the direction of lubricating composition, petroleum industry, additives, etc., can solve the problem of not increasing the ash content

Active Publication Date: 2013-06-26
INFINEUM INT LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It is also important that the ash content does not increase, since too high a sulphated ash content can lead to...

Method used

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  • Method of reducing the rate of depletion of basicity of lubricating oil composition in use in engine
  • Method of reducing the rate of depletion of basicity of lubricating oil composition in use in engine
  • Method of reducing the rate of depletion of basicity of lubricating oil composition in use in engine

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Embodiment

[0121] It is important to introduce alkalinity into the lubricating oil composition for as long as possible. It is also important that the TBN and TAN levels intersect for as long as possible. These measures all ensure longer oil life and better engine protection over a longer period.

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Abstract

Disclosed is a method of reducing the rate of depletion of basicity (as determined by ASTM D2896) of a lubricating oil composition in use in an engine. The lubricating oil composition includes at least one overbased alkali or alkaline earth metal detergent. The method comprises adding to the lubricating oil composition one or more compounds of Formula (I): (see formula I) wherein: x is 1 to 50, preferably 1 to 40, more preferably 1 to 30; R1 and R2 are H, hydrocarbyl groups having 1 to 12 carbon atoms, or hydrocarbyl groups having 1 to 12 carbon atoms and at least one heteroatom; R is a hydrocarbyl group having 9 to 100, preferably 9 to 70, most preferably, 9 to 50, carbon atoms; and n is 0 to 10, or alkaline earth metal salts thereof. The compounds of formula (I) are preferably methylene-bridged alkyl phenols or ethoxylated methylene-bridged alkyl phenols.

Description

field of invention [0001] The present invention relates to a method of reducing the rate of depletion of basicity (determined by ASTM D2896) of a lubricating oil composition for use in an engine, said lubricating oil composition comprising at least one oil-soluble overbased Alkaline or alkaline earth metal detergents. In particular, the present invention relates to a method of reducing the alkalinity depletion rate (as determined by ASTM D2896) of a lubricating oil composition used in an engine, without increasing the sulfated ash content (SASH) Comprising at least one oil-soluble overbased alkali metal or alkaline earth metal detergent. Preferred lubricating oil compositions are marine cylinder lubricants, trunk piston engine oils, gas engine oils or crankcase lubricating oil compositions (including passenger car engine oils and heavy duty diesel engine oils). Background of the invention [0002] The lubricating oil composition contains an oil soluble overbased detergent ...

Claims

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Application Information

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IPC IPC(8): C10M145/20C10N30/04
CPCC10M145/18C10M145/20C10M165/00C10M2209/101C10M2219/046C10N2010/04C10N2030/52C10N2040/25C10M161/00C10N2030/04C10N2040/252C10M129/16
Inventor A·P·马施N·J·米尔内
Owner INFINEUM INT LTD
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