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Lubricating grease composition

A technology of lubricating grease composition and synthetic oil, which is applied in the direction of lubricating composition and petroleum industry, etc., can solve the problems such as the deterioration of bearing torque performance, and achieve the effect of excellent acoustic performance and long service life of bearings

Active Publication Date: 2013-03-27
KYODO YUSHI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the viscosity of the base oil is increased, the bearing torque performance will deteriorate

Method used

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  • Lubricating grease composition
  • Lubricating grease composition
  • Lubricating grease composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0066] Test grease

[0067] ·Examples 1 to 4 and Comparative Examples 1 to 6

[0068] Mix lithium 12-hydroxystearate in the base oil shown below, heat and dissolve, and cool to make a basic grease. A predetermined amount of antioxidant is mixed with base oil, added to the basic grease, mixed thoroughly, and kneaded using a three-roll mill to produce a grease composition with a mixed consistency of 250 (JIS K2220).

Embodiment 4

[0076] The kinematic viscosity at 40°C of the mixed oil of PET oil A and diester oil B used in Example 4 is 25.0 mm 2 / s.

[0077] In addition, the kinematic viscosity at 40°C is measured in accordance with JIS K 222023. The pour point is measured in accordance with JIS K 2269.

[0078] ·Antioxidants

[0079] Antioxidant A: Alkylated N-phenyl-1-naphthylamine (Cas No.68259-36-9)

[0080] Antioxidant B: alkylated diphenylamine (Cas No.68411-46-1)

[0081] Antioxidant C: Aromatic amine (Cas No.5285-60-9)

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Abstract

The invention provides a lubricating grease composition used in rolling bearings, which is wider in temperature application range, excellent in bearing sound performance and long in service life. The lubricating grease composition is characterized in that synthetic oil containing pentaerythritol ester oil is adopted as the base oil of the lubricating grease composition and lithium soap is adopted as the thickener of the lubricating grease composition. Meanwhile, the composition also comprises the following two antioxidants in the mass ratio thereof to be 1:3-3:1, namely (a) 1-naphthyl amine antioxidant and (b) diphenylamine antioxidant.

Description

Technical field [0001] The present invention relates to a grease composition suitable for use in rolling bearings and having excellent acoustic performance, low temperature properties and lubricating life. Background technique [0002] Grease compositions used as lubricants for mechanical parts and the like are generally composed of a thickener, a base oil, and additives. [0003] As a method of obtaining grease with a long life at high temperatures, it is necessary to improve the oxidation resistance of the grease. For example, as a grease composition for high-temperature and high-speed bearings, a grease that uses a diurea compound as a thickener and an alkyl diphenyl ether oil as a base oil is proposed as a grease for automotive electrical components, engine auxiliary equipment, etc. (Patent Documents 1~3). Patent Document 4 proposes a grease using a base oil mainly composed of alkyl tetraphenyl ether oil or pentaphenyl ether oil. [0004] On the other hand, as a method for obt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/00C10N40/02C10N30/10
Inventor 佐藤雄太山本正道今井淳一
Owner KYODO YUSHI CO LTD
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