Lubricant containing molybdenum compound and secondary diarylamine

a technology of molybdenum compound and diarylamine, which is applied in the direction of lubricant composition, organic chemistry, fuels, etc., can solve the problems of demanding environment of lubricating oil used in automobiles or trucks, and achieve low treatment level, reduce the overall cost of the entire additive package, and supplemental oxidation protection and frictional properties

Inactive Publication Date: 2008-12-02
AFTON CHEM INTANGIBLES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0025]A key advantage of this invention is the multifunctional nature of the molybdenum / diarylamine combination and the relatively low treat levels required for a performance benefit. This additive combination provides both oxidation control and friction control to the oil. This reduces the need for supplemental oxidation protection and frictional properties and should reduce the overall cost of the entire additive package. Further cost reduction is gained by the low treat levels employed.

Problems solved by technology

Lubricating oils as used in the internal combustion engines of automobiles or trucks are subjected to a demanding environment during use.

Method used

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  • Lubricant containing molybdenum compound and secondary diarylamine

Examples

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example 1

[0060]The following example shows the antioxidant synergism that exist; when molybdenum naphthenate and a diphenylamine are formulated into an SAE Grade 5W-30 type motor oil. The example also shows that this antioxidant behavior is unique when compared to other metals.

[0061]A variety of oil soluble metals and one diphenylamine type antioxidant were blended into a SAE Grade 5W-30 type motor oil as shown in Table 1. The only additional antioxidant in these blends was the zinc dialkyldithiophosphate. The oxidation stability of these oils was measured by pressurized differential scanning calorimetry (PDSC) as described by J. A. Walker and W. Tsang in “Characterization of Lubrication Oils by Differential Scanning Calorimetry”, SAE Technical Paper Series. 801383 (Oct. 20-23, 1980). Oil samples were treated with an iron (III) acetylacetonate catalyst (55 ppm Fe) and 2 milligrams (mg) were analyzed in an open aluminum hermetic pan. The DSC cell was pressurized with 500 psi air and programme...

example 2

[0068]Molybdenum naphthenate and alkylated diphenylamine, Naugalube 680, from Uniroyal Chemical Company; were blended into an SAE Grade 5W-30 type motor oil as shown in Table II. The only additional antioxidant in these blends was the zinc dialkydithiophosphate. The oxidation stability of these oils was measured by pressurized differential scanning calorimetry (PDSC) as described in Example 1. These oils were also subjected to the following hot oil oxidation test: Into 25 grams (g) of each motor oil was blended 0.8 g of a catalyst mixture containing 5.55 wt % iron (III) naphthenate (6 wt % Fe content) and 94.45 wt % xylenes. Dry air was blown through the oil at rates of 10 Liters (L) / hour (h) while maintaining the temperature at 160° C. for a period of 72 hours. The oil was cooled and the percent change in viscosity between the new oil and the oxidized oil was determined at 40° C. A lower percent change in viscosity for an oil is an indication of less oil degradation and thus better...

example 3

[0070]The following example shows that other classes of amines, e.g., certain substituted amines, disubstituted phenylene diamines, and alkyl amines, are not effective or minimally effective at controlling oxidation when used in combination with molybdenum carboxylates.

[0071]Molybdenum naphthenate and a variety of amines, were blended into an SAE Grade 5W-30 type motor oil (formulated crankcase oil as described in Example 2) as shown in Table III and as further described below. The only additional antioxidant in these blends was the zinc dialkyl dithiophosphate. The oxidation stability of these oils was measured by pressurized differential scanning calorimetry (PDSC) as described in Example 1. These oils were also subjected to the hot oil oxidation test described in Example 2.

[0072]Both the hot oil oxidation test results (small percentage changes in viscosity) and the PDSC test results (prolonged oxidation induction times) show that the combination of molybdenum naphthenate and alky...

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Abstract

There is disclosed a lubricating oil composition which contains from about 100 to 450 parts per million of molybdenum from a molybdenum compound which is substantially free of active sulfur and about 750 to 5,000 parts per million of a secondary diarylamine. This combination of ingredients provides improved oxidation control and friction modifier performance to the lubricating oil. The composition is particularly suited for use as a crankcase lubricant.

Description

[0001]This is application Ser. No. 11 / 133,442, filed May 20, 2005, is a continuation of U.S. application Ser. No. 09 / 604,285, filed Jun. 26, 2000, now Re 38,929E, which is a continuation of U.S. application Ser. No. 09 / 359,770, filed Jul. 22, 1999, now Re 37,363E, both of which are reissues of U.S. Pat. No. 5,650,381, which issued from U.S. patent application Ser. No. 08 / 559,879, filed Nov. 20, 1995, the complete disclosures of which are incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]This invention relates to lubricating oil compositions, their method of preparation, and use. More specifically this invention relates to lubricating oil compositions which contain a molybdenum compound and a secondary diarylamine wherein the molybdenum compound is substantially free of active sulfur. The use of both the molybdenum and amine within certain concentrations provide improved oxidation control and friction modifier performance to lubricating ...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): C10M141/12C10M141/06C10M163/00C10M167/00
CPCC10M141/06C10M141/12C10M163/00C10M167/00C10M2205/00C10M2205/024C10M2205/026C10M2205/06C10M2207/024C10M2207/026C10M2207/028C10M2207/09C10M2207/121C10M2207/122C10M2207/125C10M2207/126C10M2207/129C10M2207/14C10M2207/142C10M2207/16C10M2207/26C10M2207/262C10M2207/289C10M2209/084C10M2209/086C10M2215/04C10M2215/06C10M2215/064C10M2215/065C10M2215/066C10M2215/067C10M2215/068C10M2215/22C10M2215/221C10M2215/225C10M2215/226C10M2215/24C10M2215/26C10M2215/30C10M2217/046C10M2217/06C10M2219/022C10M2219/046C10M2219/066C10M2219/068C10M2219/082C10M2219/087C10M2219/088C10M2219/089C10M2219/108C10M2223/045C10M2223/065C10M2227/08C10M2227/081C10M2227/082C10M2227/083C10M2227/09C10N2010/00C10N2010/12C10N2040/251C10N2040/252C10N2040/253C10N2040/255C10N2040/28C10N2040/25C10N2010/04C10N2040/08C10N2070/02
Inventor GATTO, VINCENT JAMESDEVLIN, MARK THOMAS
Owner AFTON CHEM INTANGIBLES
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