Lubricant composition

a technology of lubricating compositions and compositions, applied in the direction of lubricating compositions, additives, thickeners, etc., can solve the problems of increasing the temperature, increasing the lubricating conditions of lubricating compositions, and not being able to meet the recent severe requirements, so as to achieve the effect of long oxidation li

Inactive Publication Date: 2009-07-02
IDEMITSU KOSAN CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0012]The present invention has been made for solving the above-mentioned problems and has as its object the provision of a lubricating composition, particularly a grease composition and a lubricating oil composition, which are hardly decomposed or volatilized even at high temperatures and have a long oxidation life so that the lubricating characteristics thereof can be maintained for a long period of time.

Problems solved by technology

As a consequence, lubricating conditions of lubricating compositions become severe more and more.
This results in a further increase of the temperature.
The above-described inventions are contemplated to attain a long service life of lubricating compositions at high temperatures but are still unsatisfactory to meet the recent severe requirements.

Method used

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Examples

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examples

[0044]The present invention will be next described in more detail by way of examples but is not limited to the examples in any way.

[0045]In the following Examples and Comparative Examples, various characteristics were tested in accordance with the methods described below.

(1) Flash Point:

[0046]Flash point was measured in accordance with JIS K2265 (Cleveland open cup method).

(2) Dropping Point:

[0047]Dropping point was measured in accordance with JIS K2220.

(3) Oxidation Life:

[0048]Grease was applied on a cleaned SPCC steel plate in a thickness of 0.5 mm. The plate was then allowed to quiescently stand in a thermostat chamber and thereafter taken out from the chamber. The resulting specimen was measured by IR to determine the deterioration by oxidation. The oxidation life is a time period taken for the ratio (I720) / (I1710) of the transmittance at 720 cm−1 to the transmittance at 1710 cm−1 to be 1.2 or more.

(4) Oil Separation:

[0049]Oil separation was measured in accordance with JIS K2220...

example 3

[0058](1) In two-third amount of a base oil, 1 mole of diphenylmethane-4,4′-diisocyanate (MDI) was dissolved with heating to obtain a raw material 1.

[0059](2) In the remaining one-third amount of the base oil was dissolved 2 moles of octylamine with stirring to obtain a raw material 2.

[0060](3) Next, while vigorously stirring the raw material 1 at 50 to 60° C. in a grease preparation vessel, the raw material 2 was gradually added thereto. The mixture was heated with stirring. When the temperature of 165° C. was reached, the grease composition was further maintained at that temperature for 1 hour.

[0061](4) Then, an aralkylated diphenylamine and a phenol compound 1 were added to and mixed with the composition. The resulting mixture was allowed to spontaneously cool to room temperature and finished using a three-roll blending machine to obtain a grease composition of Example 3.

[0062](5) The grease composition of Example 3 was subjected to the above tests (2) to (4). The results are sum...

example 4

[0063](1) In a grease preparation vessel, a half amount of a base oil, 15% by mass of lithium 12-hydroxystearate were charged and heated with stirring. When the temperature of 210° C. was reached, the grease composition was further maintained at that temperature for 5 minutes.

[0064](2) Then, the grease composition was added with the remaining half of the base oil and thereafter cooled to 80° C. at a rate of 50° C. per hour. Thereafter, an aralkylated diphenylamine and a phenol compound 1 were added to and mixed with the composition.

[0065](4) The resulting mixture was allowed to spontaneously cool to room temperature and finished using a three-roll blending machine to obtain a grease composition of Example 4.

[0066](5) The grease composition of Example 4 was subjected to the above tests (2) to (4). The results are summarized in Table 1.

TABLE 1ExampleComparative Example12341234567CompoundingBase oil1 *182.082.082.082.082.082.082.082.082.082.082.0amountLi Complex soap *215.015.015.015.0...

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Abstract

The present invention provides a lubricating composition, particularly a grease composition and a lubricating oil composition, containing an aralkylated diphenylamine and a phenol compound having a molecular weight of not less than 340 which are compounded into a base oil. The lubricating composition is hardly decomposed or volatilized even at high temperatures and has a long oxidation life so that the lubricating characteristics thereof can be maintained for a long period of time.

Description

TECHNICAL FIELD[0001]The present invention relates to a lubricating composition and, more particularly, to a high temperature grease composition used for the lubrication of various machines and apparatuses such as automobiles, electric appliances, construction machines and machine tools as well as bearings and to a lubricating oil composition used for a long period of time under high temperatures in oil hydraulic, compression and vacuum pumps, bearings, gears, etc.BACKGROUND ART[0002]A lubricating composition is widely used in various machines such as automobiles, electric appliances, construction machines and machine tools. Such machines have been demanded year by year for meeting requirements of compact size, high output, light weight and simple maintenance. As a consequence, lubricating conditions of lubricating compositions become severe more and more. To make a machine compact in size and high in output is to reduce the dimension thereof when the output thereof is the same. Whe...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C10M129/76C10M133/12C10M133/20
CPCC10M141/06C10M169/06C10N2250/10C10M2203/1025C10M2205/0285C10M2207/022C10M2207/026C10M2207/106C10M2207/1285C10M2207/1426C10M2207/283C10M2207/289C10M2215/006C10M2215/064C10M2215/065C10M2215/1026C10M2215/223C10M2219/046C10M2229/041C10N2220/00C10N2220/021C10N2230/00C10N2230/06C10N2230/08C10N2230/10C10N2230/74C10N2240/00C10N2240/02C10N2240/04C10N2240/08C10N2210/02C10N2020/00C10N2020/04C10N2030/00C10N2030/08C10N2030/10C10N2030/74C10N2030/06C10N2040/02C10N2040/00C10N2040/04C10N2040/08C10N2050/10C10N2010/04
Inventor FUJINAMI, YUKITOSHIKAMIMURA, HIDETO
Owner IDEMITSU KOSAN CO LTD
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