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A lubricating oil composition

A lubricating oil composition and the technology of the composition are applied in the field of crankcase lubricants to improve phosphorus retention, and can solve problems such as pollution of exhaust gas after-treatment devices

Active Publication Date: 2010-03-10
INFINEUM INT LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, even at these reduced phosphorus contents, fouling of exhaust gas aftertreatment devices, especially oxidation catalysts, remains problematic

Method used

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  • A lubricating oil composition
  • A lubricating oil composition
  • A lubricating oil composition

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Embodiment

[0118] The present invention will now be specifically described in the following examples, which are not intended to limit the scope of the claims thereto.

[0119] The lubricant of the present invention, lubricant 1, contains as additive component (B) an oil-soluble zinc dithiophosphate, the dithiophosphoric acid being P 2 S 5 with Chung C 6 The reaction product of a mixture of alcohol (75% by mass) and glycerol monooleate (25% by mass), the salt was prepared essentially as described in US-A-5,013,465.

[0120] A reference lubricant, Lubricant A, contained a mixture of two separate ZDDPs in place of the additive component (B) of Lubricant 1, the mixture comprising (i) a first oil-soluble zinc dithiophosphate (78% by mass), the dithiophosphoric acid as P 2 S 5 with Chung C 6 The reaction product of alcohol; and (ii) an independent second oil-soluble zinc dithiophosphate (22% by mass), the dithiophosphoric acid being P 2 S 5 with C 8 The reaction product of an alcohol, ...

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Abstract

The invention discloses a lubricating oil composition, which contains (A) an oil of lubricating viscosity in a major amount; and, (B) as an additive component in a minor amount, an oil-soluble zinc salt of dithiophosphoric acid, wherein the dithiophosphoric acid is the reaction product of phosphorus pentasulphide with a mixture of at least one first alcohol of the formula ROH and at least one second alcohol, wherein R is an aliphatic hydrocarbyl group having at least four carbon atoms or is an alkaryl group, and the second alcohol is an ester of a polyhydric alcohol.

Description

field of invention [0001] The present invention relates to automotive lubricating oil compositions, and more particularly to automotive lubricating oil compositions for the lubrication of crankcases of piston engines, especially gasoline engines (spark ignition) and diesel engines (compression ignition), said compositions For crankcase lubricant. In particular, although not exclusively, the present invention relates to automotive lubricating oil compositions exhibiting enhanced phosphorus retention, having a low phosphorus content, and preferably also having a low sulfur and / or sulfated ash content; to additives in Use in said composition for improving phosphorus retention. Background technique [0002] Crankcase lubricants are oils used for general lubrication in internal combustion engines in which the oil sump is generally located under the crankshaft of the engine and into which the circulating oil flows back. It is known to include additives in crankcase lubricants fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M137/10C10M129/54C10N30/06C10N30/10C10N40/25
CPCC10N2230/38C10N2230/45C10N2240/104C10M2223/121C10N2240/102C10M2203/1025C10M2223/045C10N2230/42C10M137/10C10N2230/43C10M2207/262C10N2030/38C10N2030/43C10N2030/45C10N2030/42C10N2040/252C10N2040/255C10N2020/02C10N2010/02C10N2010/04
Inventor M·D·安德鲁斯B·R·埃尔维奇
Owner INFINEUM INT LTD