Lubricating oil compositions

Inactive Publication Date: 2010-04-01
CHEVRON ORONITE CO LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0015]The lubricating oil composition of the present invention advantageously possesses improved wear reducing properties while containing no zinc dialkyl dithiophosphate compound as compared to a corresponding lubricating oil composition in which a zinc dialkyl dithiophosphate compound is present therein. This is unexpected as zinc dia

Problems solved by technology

However, simple base oils alone do not provide the necessary properties to provide the necessary wear protection, deposit control, etc., required to protect internal combustion engines.
However, a problem associated with the use of zinc dialkyldithiophosphate is that their phosphorus and sulfur derivatives poison the catalyst components of the catalytic converters.
As previously mentioned, these catalyst components are poisoned by the phosphorus and sulfur components, or the phosphorus and sulfur decomposition product of the zinc dialkyldithiophosphate; and accordingly, the use of engine oils containing phosphorus and sulfur additives may substantially reduce the lif

Method used

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  • Lubricating oil compositions
  • Lubricating oil compositions

Examples

Experimental program
Comparison scheme
Effect test

Example

EXAMPLE 1

[0079]A lubricating oil composition was formed containing 3.858 wt. % of an ethylene carbonate post-treated bis-succinimide prepared from a 2300 average molecular weight polyisobutenyl succinic anhydride with a heavy polyamine, 0.286 wt. % borated glycerol monooleate friction modifier, 0.487 wt. % molybdenum succinimide dispersant / wear inhibitor, 0.490 wt. % diphenylamine antioxidant, 0.593 wt. % 17 TBN calcium sulfonate detergent, 1.141 wt. % 410 TBN calcium sulfonate detergent, 0.050 wt. % silicone-based foam inhibitor, 0.537 wt. % Exxon 100 N diluent oil and 4.800 wt. % ethylene-propylene copolymer viscosity index improver, in 87.46 wt. % Group II base oil. The resulting lubricating oil composition had a phosphorus content of 0 wt. % and a sulfur content of 0.051 wt. %.

COMPARATIVE EXAMPLE A

[0080]To the lubricating oil composition of Example 1 was added 0.64 wt. % of zinc dihydrocarbyl dithiophophate. The resulting lubricating oil composition had a phosphorus content of ...

Example

COMPARATIVE EXAMPLE B

[0081]A lubricating oil composition was formed containing 2.35 wt. % succinimide dispersant, 6 wt. % borated succinimide dispersant, 2.84 wt. % 260 TBN sulfurized calcium phenate detergent, 1.02 wt. % 17 TBN calcium sulfonate detergent, 0.22 wt. % 410 TBN calcium sulfonate detergent, 0.3 wt. % diphenyl amine antioxidant, 0.6 wt. % hindered phenol antioxidant, 0.4 wt. % terephthalic acid salt of a bis-succinimide (derived from 1300 MW PIBSA and heavy polyamine) dispersant, 0.5 wt. % molybdenum succinimide complex dispersant / wear inhibitor, 10 ppm foam inhibitor, 5.75 wt. % functionalized viscosity index improver, 0.3 wt. % pour point depressant, 0.75 wt. % non-functionalized viscosity index improver, and 1.89 wt. % zinc dihydrocarbyl dithiophophate in 76.17 wt. % base oil consisting of 24.5 wt. % base oil consisting of 24.5% Group II base oil having a kinematic viscosity (kv) at 100° C. of 4.7 to 4.9 cSt and 75.5 wt. % Group II base oil having a kv at 100° C. of ...

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PUM

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Abstract

A lubricating oil composition comprising (a) a major amount of an oil of lubricating viscosity, (b) an ashless dispersant, (c) at least one metal-containing detergent, (d) an antioxidant, and (e) an anti-wear agent, wherein the lubricating oil composition is free of any zinc dialkyl dithiophosphate compound and is substantially free of any phosphorus content is disclosed.

Description

BACKGROUND OF THE INVENTION[0001]1. Technical Field[0002]The present invention generally relates to lubricating oil compositions for reducing wear in engines.[0003]2. Description of the Related Art[0004]Automobile spark ignition and diesel engines have valve train systems including, for example, valves, cams and rocker arms, which present special lubrication concerns. It is extremely important that the lubricant, i.e., the engine oil, protects these parts from wear. It is also important for the engine oils to suppress the production of deposits in the engines. Such deposits are produced from non-combustibles and incomplete combustion of hydrocarbon fuels (e.g., gasoline and diesel fuel oil) and by the deterioration of the engine oil employed.[0005]Engine oils typically use a mineral oil or a synthetic oil as a base oil. However, simple base oils alone do not provide the necessary properties to provide the necessary wear protection, deposit control, etc., required to protect internal...

Claims

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Application Information

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IPC IPC(8): C10M133/04
CPCC10M163/00C10M2203/1006C10N2240/102C10N2240/10C10N2230/52C10N2230/43C10N2230/42C10N2230/40C10N2230/06C10N2220/021C10N2210/06C10M2229/02C10M2227/09C10M2223/045C10M2219/089C10M2219/068C10M2219/046C10M2217/043C10M2215/28C10M2215/08C10M2215/065C10M2215/064C10M2215/06C10M2215/04C10M2207/289C10M2203/1025C10M2205/022C10M2205/024C10M2207/026C10M2207/028C10M2207/142C10M2207/283C10N2260/14C10N2260/06C10N2210/02C10N2260/00C10M2203/003C10M2219/044C10N2010/12C10N2020/04C10N2020/02C10N2030/40C10N2030/43C10N2030/42C10N2030/52C10N2030/06C10N2040/25C10N2040/252C10N2010/04C10N2060/00C10N2060/14C10N2060/06C10M141/06
Inventor YAMAGUCHI, ELAINE S.NG, KAM-SIK
Owner CHEVRON ORONITE CO LLC
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