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Lubricating composition substantially free of ZDDP

a technology of lubricating composition and zddp, which is applied in the direction of lubricant composition, organic chemistry, fuels, etc., can solve the problems of increasing the amount of greenhouse gases such as nitric oxide and/or sulphur oxides, and reducing the performance of catalysts. , to achieve the effect of improving engine cleanliness, reducing no, and reducing wear

Inactive Publication Date: 2005-07-07
THE LUBRIZOL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a composition comprising a metal salixarate and at least one additive selected from the group consisting of an antioxidant, a friction modifier, a dispersant, a viscosity modifier, a dispersant viscosity modifier, and an antiwear agent other than a metal hydrocarbyl dithiophosphate. The composition also contains an oil of lubricating viscosity. The use of this composition improves engine cleanliness, decreases wear, decreases NO, emissions, and particulate emissions. The invention also provides a process for preparing the composition.

Problems solved by technology

Further, sulphur and phosphorus tend to poison the NO, catalysts used in catalytic converters, resulting in a reduction in performance of said catalysts.
Any reduction in the performance of catalytic converters tends to result in increased amounts of greenhouse gases such as nitric oxide and / or sulphur oxides.
However, reducing the amount of ZDDP will increase the amount of wear in an engine.
Also reducing the amount of detergent will decrease engine cleanliness and result in increased soot deposits.

Method used

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  • Lubricating composition substantially free of ZDDP
  • Lubricating composition substantially free of ZDDP
  • Lubricating composition substantially free of ZDDP

Examples

Experimental program
Comparison scheme
Effect test

example 4

Preparative Example 4

Potassium Salixarate

[0098] A vessel is charged with 313 g of the salixarene from Preparative Example 1, and heated under a nitrogen atmosphere to 80° C. where 12.1 g of potassium hydroxide in 7 g of water is added dropwise followed by the addition of 85 g of a diluent oil. The vessel and contents are heated to 110° C. for 10 minutes, then heated to 120° C. for 90 minutes and heated to 140° C. for 3 hours. A dark brown product is formed.

reference example 1

[0099] A composition is prepared by mixing (a) 42.5 g of Nexbase™3050 oil, (b) 34.4 g of Nexbase™3043 oil, (c) on a an oil free basis 0.4 g of an amine dispersant viscosity modifier, (d) on a an oil free basis 2.8 g of polyisobutylene succinimide dispersants, (e) 5 g of antioxidants including a diphenylamine and a hindered phenol, (f) 0.7 g of an olefin copolymer viscosity modifier and (g) a glycerol monooleate friction modifier. The composition contains 0 wt % of calcium, 0 wt % of phosphorus, 190 ppm of sulphur and 0 wt % of zinc. The composition has a KV100 of 13.11 mm2 / s (cSt) and a sulphated ash content of 0 wt %.

reference example 2

Top Tier European Passenger Car Oil Formulation

[0100] Reference Example 2 is a successful European top tier passenger car oil formulation containing zinc dithiophosphate. The elemental analysis of the oil formulation indicates a calcium content of 3307 ppm, a phosphorus content of 889 ppm, a sulphur content of 2645 ppm and a zinc content of 889 ppm. The oil formulation has a KV100 of 11.3 mm2 / s (cSt) and sulphated ash content of 1.26 wt %.

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Abstract

The present invention provides a composition comprising: (a) a metal salixarate; (b) at least one additive selected from the group consisting of (1) an antioxidant; (2) a friction modifier; (3) a dispersant; (4) a viscosity modifier; (5) a dispersant viscosity modifier; and (6) an antiwear agent other than a metal hydrocarbyl dithiophosphate; and (c) an oil of lubricating viscosity, wherein the composition contains 400 ppm or less of phosphorus derived from a metal hydrocarbyl dithiophosphate. The invention further provides a process for preparing the composition and its use.

Description

FIELD OF INVENTION [0001] The present invention relates to a lubricating oil composition containing a metal salixarate and other performance additives. The lubricating oil composition has antiwear and detergency performance in the absence of a metal hydrocarbyl dithiophosphate. BACKGROUND OF THE INVENTION [0002] It is well known for lubricating oils to contain a number of additives used to protect the engine from wear, the accumulation of sludge and filter plugging. Common additives for engine lubricating oils are zinc dialkyldithiophosphate (ZDDP) as an antiwear additive, and overbased calcium sulphonate detergents. It is believed that ZDDP antiwear additives protect the engine by forming a protective film on metal surfaces. Typical treatment quantities of ZDDP range from 1 to 2 weight percent based on the total weight of the lubricant. Detergents such as overbased calcium sulphonate help keep the engine parts clean of soot and other deposits, and offer an alkalinity reserve. Typic...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C10M159/22C10M163/00
CPCC10M159/22C10N2240/10C10M2207/026C10M2207/027C10M2207/028C10M2207/144C10M2207/262C10M2207/288C10M2209/086C10M2215/02C10M2215/064C10M2215/28C10M2217/06C10N2230/04C10N2230/06C10N2230/42C10N2230/43C10N2230/50C10M163/00C10N2030/04C10N2030/50C10N2030/43C10N2030/42C10N2030/06C10N2040/25
Inventor FRIEND, CHRISTOPHER L.MCATEE, RODNEY J.SUTTON, MICHAEL ROBERTCRESSEY, DAVID
Owner THE LUBRIZOL CORP
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