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Dispersant and lubricant composition containing same

A technology of lubricating oil composition and dispersant, which is applied in the direction of lubricating composition, additives, petroleum industry, etc., and can solve the problems of insufficient dispersibility and affecting the cleanliness of pistons, etc.

Inactive Publication Date: 2006-06-28
INFINEUM INT LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] It has been found that lubricating compositions formulated with dispersants having an average functionality of about 1.0 to 1.2 provide adequate piston cleanliness but insufficient dispersibility
Use of one or more higher functionality dispersants improves dispersibility at the expense of piston cleanliness

Method used

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  • Dispersant and lubricant composition containing same
  • Dispersant and lubricant composition containing same
  • Dispersant and lubricant composition containing same

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Embodiment Construction

[0123] The VW TDi engine test is the latest edition in the more stringent 'Diesel Deposit Test' series. It is recognized in the industry as a very stringent test of lubricant performance, to the extent that passing it characterizes the formulated lubricant in many ways.

[0124] TDi is a 4-cylinder, 1.9-litre, 81kW passenger car diesel engine. It is a direct injection engine with a turbocharger system used to increase the power output of the unit. The procedure for industrial testing consists of repeated cycles of hot and cold operating conditions; the so-called PK cycle. It consists of an idle cycle of 30 minutes at zero load (K(Kalt) section), followed by 150 minutes at full load and at 4150 rpm (P(power section)). The entire cycle is then repeated for a total of 54 hours. During this 54 hour period, no top up was made to the 4.5 liters of test lubricant initial oil. Therefore, losses caused by evaporation, combustion and other physical losses are acceptable.

[0125] D...

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Abstract

A boron-containing dispersant composition containing one or more dispersants that are the reaction product of a polyalkenyl-substituted mono- or dicarboxylic acid, anhydride or ester; and a polyamine, in which at least one of the dispersants has a polyalkenyl moiety with a number average molecular weight of at least about 1800, and from greater than about 1.3 to about 1.7 mono- or di-carboxylic acid producing moieties per polyalkenyl moiety; and in which a ratio of wt. % of boron to wt. % of nitrogen (B / N) for the dispersant composition is from about 0.05 to about 0.24.

Description

[0001] The present invention relates to a dispersant for a lubricating oil composition and a lubricating oil composition containing the dispersant. More specifically, the present invention relates to dispersants that provide excellent control of sludge / sludge formation and viscosity increase of lubricating oil compositions during service due to carbon deposits, and which also improve piston cleanliness and piston ring bonding properties. Background of the invention [0002] Additives are commonly used to improve the performance of lubricating oils for gasoline and diesel engines. Additives or additive blends are used for various purposes such as improving detergency, reducing engine wear, making lubricating oils resistant to heat and oxidation, reducing oil consumption, inhibiting corrosion and reducing frictional losses. A "dispersant" is normally maintained in suspension in the oil, is an insoluble material formed by oxidation and other mechanisms during...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M143/06C09K23/00C10M101/02C10M133/56C10M135/18C10M137/10C10M139/00C10M159/22C10M169/04C10N10/04C10N10/12C10N20/00C10N20/02C10N20/04C10N30/04C10N40/25
CPCC10M133/56C10M139/00C10M2215/28C10N2230/04C10N2230/74C10N2240/103C10N2270/02C10N2030/04C10N2030/74C10N2040/253C10N2070/02
Inventor I·A·W·贝尔J·爱默特R·费娄斯A·古蒂尔瑞兹R·罗布森
Owner INFINEUM INT LTD
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