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Lubricating composition

a technology of lubricating composition and additive, which is applied in the direction of additives, lubricant compositions, petroleum industry, etc., can solve the problems of unsatisfactory lead corrosion, metal corrosion, present in the engine, etc., and achieve the effect of improving the lead corrosion protection of the lubricant composition and improving the lead corrosion protection

Inactive Publication Date: 2008-06-12
AFTON CHEMICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0009]Another aspect of the disclosure is directed to a method of improving lead corrosion protection of a lubricant composition. The method comprises providing to a machine a lubricant composition of the present disclosure, wherein the lubricant composition provides improved lead corrosion protection as compared to the same composition that does not contain both the disclosed hydrocarbyl substituted triazole compound and the amide, where both compositions are employed under the same machine operating conditions over the same period of time.

Problems solved by technology

Lubricants employed in lead containing engines have been observed to cause undesirable lead corrosion.
This demanding environment results in oxidation of the oil, which can in turn result in corrosion of the metals, such as lead, present in the engine.
Lead corrosion can also be a problem in other lubricant applications, including passenger car engine oils, high speed diesel engine oils, turbine oils, automatic transmission fluids and many industrial lubricants.
While lead corrosion inhibitors are known for reducing lead corrosion caused by these lubricant formulations, lead corrosion can still be problematic.
However, it is well known that some sulfur-containing agents cannot be used in engines having silver parts given their known propensity to damage the silver bearings.

Method used

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Examples

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examples

[0062]The following examples are illustrative of the invention and its advantageous properties. In these examples as well as elsewhere in this application, all parts and percentages are by weight unless otherwise indicated. It is intended that these examples are being presented for the purpose of illustration only and are not intended to limit the scope of the invention disclosed herein.

examples 1 to 7

[0063]The following examples of Table I illustrate a synergism between the triazoles and amides of the present disclosure. Each formulation of Examples 1 to 7 of Table I were tested in the Ethyl Oxidation Test, a bubbling oxidation test run for 120 hours on 300 grams of oil in an ASTM D943 apparatus at 300° F., with 5 l / hr oxygen bubbling through the oil, and metal coupon catalysts, one inch square each of copper, iron and lead present.

[0064]As the test proceeds, the oxidized oil becomes very corrosive to the lead coupon as shown by Example 5 below. The lead content of the oxidized oils was done by the ICP method.

[0065]The formulations in the examples below consisted of a “core” group of medium speed diesel additive components including antiwear / EP agents, alkalinity agents, detergents and antioxidants. A 1,2,4-triazole compound of formula II, (Irgamet 30) and an amide of the present disclosure (a reaction product of aminoguanidine bicarbonate and oleic acid) were added to this “cor...

examples 8 to 12

[0068]The Examples of Table 2 below were prepared similar to those of Table I above, but with the ingredient compositions specified in Table 2. All of the blends of Examples 8 to 12 were prepared using the same core package, which included typical medium speed diesel combinations of detergents, dispersants, antioxidants, alkalinity components and antiwear agents. The same amount and type of dispersant was used in all of Examples 8 to 12. These Examples were also subject to the Ethyl Oxidation Test, which was carried out as described above for Examples 1 to 7. The results of Examples 8 to 12 are indicated in Table 2 below.

TABLE 2Ethyl Oxidation Testing Of MSD FormulationsEXAMPLE89101112“Core” MSD12.85% 12.85% 12.85% 12.85% 12.85%FormulationBase Oil87.15%89.985%85.664%85.710%85.677%Triazole0165014,860 0330(ppmw)Amide000 1.44% 1.44%EOT 120989020201090339184HoursLead (ppmw)Mgs Pb Lost @288655629894 51120 Hoursfrom LeadCoupons

[0069]The results of the tests shown in Table 2 corroborate th...

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Abstract

The present application is directed to additive package compositions including a diluent; a hydrocarbyl substituted triazole compound; and an amide formed by reacting an amine compound chosen from guanidines, ureas and thioureas with a C5 to C60 aliphatic carboxylic acid, with the proviso that the triazole compound is not an alkyl bis-3-amino-1,2,4-triazole or an oleyl-1,2,4-triazole-3-amine. Lubricant compositions and methods of employing the lubricant compositions are also disclosed.

Description

FIELD OF THE DISCLOSURE [0001]The present disclosure is directed to additive and lubricant compositions and methods for use thereof. More particularly, this invention is directed to an additive composition comprising a triazole compound and an amide.BACKGROUND OF THE DISCLOSURE [0002]Lead and lead alloys are known for use in many types of engines and other machines. For example, lead alloys are known for use in bearings used in many applications, including main bearings used in spark ignition and compression-ignition internal combustion engines, also referred to as diesel engines.[0003]Lubricants employed in lead containing engines have been observed to cause undesirable lead corrosion. For example, lubricants for medium speed diesel engines are used in applications where thousands of horsepower (e.g., 2000 to 10,000 horsepower) are needed and often run at a speed of about 100 to 1,200 rpm. This demanding environment results in oxidation of the oil, which can in turn result in corro...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C10M133/44
CPCC10M133/44C10M2215/08C10N2230/02C10N2230/10C10N2230/12C10N2240/10C10N2230/42C10N2240/02C10M2215/223C10N2030/02C10N2030/10C10N2030/12C10N2030/42C10N2040/02C10N2040/25C10N2040/252
Inventor HUTCHISON, DAVID A.
Owner AFTON CHEMICAL
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