Grease composition

A technology of lubricating grease composition and urea compound, applied in lubricating composition, mechanical equipment, thickener and other directions, can solve the problems of oil film destruction, limited base oil, inability to meet sufficient service life, etc. The effect of suppressing the occurrence of oil film breakage

Active Publication Date: 2013-11-27
KYODO YUSHI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, if the kinematic viscosity of the base oil of the grease is lowered, although the stirring resistance is lowered, the oil film is broken in the same way as described for the lubricating oil, and sufficient life cannot be achieved, such as peeling life and seizure life. Usable base oils are limited

Method used

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  • Grease composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Preparation of test grease

[0045] The thickeners and base oils shown in Table 1 were used to prepare grease compositions of Examples and Comparative Examples. Specifically, 4,4-diphenylmethane diisocyanate and a predetermined amine were reacted in a base oil, heated and cooled, and then kneaded with a 3-roll mill to obtain Examples 1 and 2 and Comparative Examples 1-9 The grease composition. As the base oil, the kinematic viscosity at 40°C measured in accordance with JIS K222023 is used, which is 70.2mm 2 / s synthetic hydrocarbon oil, namely poly-α-olefin oil, or its kinematic viscosity at 40℃ is 11.6mm 2 / s diester oil is dioctyl sebacate. The amount of thickener was adjusted so that the blending consistency (test method JIS K22207.) of the grease composition was 300.

[0046] The composition prepared above was evaluated by the following test method. The results are shown in Table 1.

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Abstract

The invention provides a grease composition which contains a base oil and a thickener, where the thickener is a diurea compound represented by formula (1), and the thickener is contained in an amount of 3 to 20 mass % in the grease composition: wherein R2 is diphenylmethane group; and R1 and R3, which may be the same or different represent cyclohexyl group or a straight-chain or branched alkyl group having 8 to 22 carbon atoms, with the ratio of the number of moles of the cyclohexyl group to the total number of moles of the cyclohexyl group and the alkyl group, expressed as [((the number of the cyclohexyl group) / (the number of the cyclohexyl group+the number of the alkyl group))×100] being 70 to 80 mol %.

Description

Technical field [0001] The invention relates to a grease composition that can be used for lubricating various mechanical parts such as rolling bearings, gears, ball screws, linear motion bearings, cams and joints. Background technique [0002] In recent years, from the viewpoint of reducing energy consumption, electrical equipment and mechanical parts used in various industries, represented by automobiles, have sought to increase efficiency, and various researches have been carried out such as weight reduction of parts and structural improvements. Particularly, mechanical parts with rotating bodies agitate the lubricant, so the resistance causes energy loss. Therefore, a lubricant with low stirring resistance is sought. [0003] For example, in engine oil and transmission oil, in order to reduce the stirring resistance of lubricating oil, it has been proposed to lower the viscosity (Non-Patent Documents 1 and 2). However, these countermeasures cause the destruction of the oil fil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/02C10M105/04C10M105/38C10M115/08F16C19/00F16C33/66C10N20/00C10N30/06C10N40/02C10N40/04C10N50/10
CPCC10M115/08C10M2215/1026C10M2203/0206F16C33/6633C10M169/02C10M2207/2835C10M2205/0285C10M2207/2825C10N2030/02C10N2040/04C10N2040/02C10N2050/10
Inventor 山本正道佐藤雄太
Owner KYODO YUSHI CO LTD
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