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Amine tungstates and lubricant compositions

Inactive Publication Date: 2009-01-29
KING INDUSTRIES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0006]This invention relates to new tungsten containing lubricating oil additives, compositions, their method of preparation, and use. More specifically, this invention relates to lubricating oil compositions which contain a tungsten compound and an aminic antioxidant such as alkylated diphenyl amines and / or alkylated phenothiazines. In addition the composition may additionally include a sulfur-containing additive such as sulfurized olefins, sulfurized vegetable oils, sulfurized animal fats and oils, sulfurized fatty acids, sulfurized synthetic esters, sulfurized acrylates and sulfurized methacrylates, and sulfurized succinic acid derivatives, thiadiazole, dithiocarbamate, dithiophosphate and mixtures thereof. The use of both the tungsten containing additive and the alkylated secondary diarylamine, and alternatively further with phenothiazine, provides improved oxidation and deposit control to lubricating oil compositions. The lubricating oil compositions of this invention are particularly useful as crankcase and transmission lubricants, gear oils and other high performance lubricant applications.
[0009]This invention also provides lubricating oil compositions with enhanced performance properties that result from suprising synergistic interactions between the amine tungstates and various lubricant additives, such as ashless friction modifiers, metal-containing antiwear additives, ashless antiwear additives, extreme pressure agents, corrosion inhibitors / detergents, yellow metal deactivators / copper passivating agents, or mixtures thereof.

Problems solved by technology

Lubricating oils as used in the internal combustion engines and transmissions of automobiles or trucks, gear oils and other high temperature lubricant applications are subjected to a demanding environment during use.

Method used

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  • Amine tungstates and lubricant compositions
  • Amine tungstates and lubricant compositions
  • Amine tungstates and lubricant compositions

Examples

Experimental program
Comparison scheme
Effect test

example 28

[0285]NALUBE AO-142, an alkylated diphenylamine antioxidant available from King Industries, Inc., Norwalk, Conn., the product of Example 2 and an ISO VG 46 Group II base oil from Chevron were blended in the amounts shown in Table 1 for 30 minutes at 50° C. The resulting formulated oil was evaluated for oxidative stability by the ASTM D 2272 Rotating Pressure Vessel Oxidation Test (RPVOT) as described above.

examples 29-30

[0286]The formulated oils of Examples 29 and 30 were prepared using the procedure of Example 28 except that Molyvan 822, a molybdenum dialkyldithiocarbamate available from R. T. Vanderbilt was substituted completely or partially for the product of Example 2 in the amounts designated in Table 1.

[0287]The RPVOT results show that the formulation of Example 30, containing a combination of the amine tungstate and organomolybdenum compound (Molyvan 855) gave an improved oxidation stability compared to formulations containing only the amine tungstate or organomolybdate at equivalent total metal content.

TABLE 1ExampleComponents, wt %282930NA-LUBE AO-1420.250.250.25Molyvan 822 (4.9% Mo)—0.590.295Amine Tungstate of Example 2 (18% W)0.16—0.08Chevron ISO 46 Grp II Base Oil99.5999.1699.38Molybdenum Content (ppm)2880144Tungsten Content (ppm)0288144Total Metal Content (ppm)288288288

[0288]b) Wear Performance by ASTM D 4172 Four Ball Wear Testing

[0289]The synergistic wear performance of combinations...

example 31

[0290]The base model formulated oil used for this test is shown in Table 1 to which a fixed amount of metal-containing antiwear additive was added. Metal-containing antiwear additives evaluated were Molyvan 822, a molybdenum dialkyldithiocarbamate available from R. T. Vanderbilt; Molyvan L, a molybdenum dialkylthiophosphate available from R. T. Vanderbilt; and Rhein Chemie RC 8210, a zinc dialkyldithiophosphate available from Rhein Chemie. To the formulation containing the fixed concentration of metal-containing antiwear additive was added increasing amounts of the amine tungstates of the invention (Example 2). Each resulting formulation was tested by the ASTM D 4172 Four Ball Wear Test. In all cases, the wear scar of formulations with the metal-containing antiwear additive decreased with increasing concentration of the amine tungstate of the invention (Example 2). It was also demonstrated that the amine tungstate at the highest concentration of Table 3 (0.32 wt percent) did not pro...

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PUM

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Abstract

This invention relates to lubricating oil additives, and to lubricating oil compositions, their method of preparation, and use. More specifically, this invention relates to several novel lubricating oil additives and compositions which contain a tungsten compound and an antioxidant, namely aminic antioxidants such as a secondary diarylamine or an alkylated phenothiazine. The use of the tungsten compound with the secondary diarylamine and / or the alkylated phenothiazine provides improved oxidation and deposit control to lubricating oil compositions. The lubricating oil compositions of this invention are particularly useful as crankcase and transmission lubricants, gear oils and other high performance lubricant applications.

Description

[0001]This application is a continuation-in-part of U.S. patent application Ser. No. 11 / 457,144, filed on Jul. 12, 2006, which claims the benefit of priority to U.S. Provisional Application 60 / 698,750, filed on Jul. 12, 2005. The contents of both U.S. patent application Ser. No. 11 / 457,144 and U.S. Provisional Application 60 / 698,750 are incorporated herein by reference in their entirety.FIELD OF THE INVENTION[0002]This invention relates to lubricating oil additives, and to lubricating oil compositions, their method of preparation, and use. More specifically, this invention relates to several novel lubricating oil additives and compositions which contain a tungsten compound and an antioxidant, namely aminic antioxidants such as a secondary diarylamine or an alkylated phenothiazine. The use of the tungsten compound with the secondary diarylamine and / or the alkylated phenothiazine provides improved oxidation and deposit control to lubricating oil compositions. The lubricating oil compo...

Claims

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Application Information

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IPC IPC(8): C10M159/18
CPCC07F11/005C10M141/06C10N2240/04C10N2230/10C10N2230/06C10M141/08C10M141/10C10M2203/065C10M2205/0285C10M2205/223C10M2207/026C10M2207/16C10M2207/289C10M2207/40C10M2215/04C10M2215/042C10M2215/064C10M2215/082C10M2215/086C10M2215/223C10M2215/224C10M2219/044C10M2219/068C10M2219/108C10M2223/041C10M2223/045C10M2223/047C10M2223/063C10N2210/06C10N2210/02C10N2010/12C10N2030/10C10N2040/04C10N2030/06C10N2010/04
Inventor RAVICHANDRAN, RAMANATHANABI-KARAM, FAROUKYERMOLENKA, ALENAHOURANI, MICHELROEHRS, INGOHESSELL, EDWARD T.
Owner KING INDUSTRIES INC
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