Lubricating grease composition

A technology of lubricating grease composition and solid lubricant, applied in the directions of lubricating composition, thickener, base material, etc., can solve the problems of not considering low temperature torque characteristics, high temperature shear stability and high temperature oil separation characteristics, etc. The effect of excellent low temperature torque characteristics and high static friction coefficient

Pending Publication Date: 2019-04-02
NOK KLUEBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, the grease composition disclosed in Patent Document 1 was developed as a grease composition having both lubricating function (low dynamic friction coefficient) and static function (high static friction coefficient), but its static friction coefficient is about 0.07 , is small, so there is room for improvement
In addition, the development of the above-mentioned grease composition did not consider low-temperature torque characteristics, high-temperature shear stability, and high-temperature oil separation characteristics

Method used

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Embodiment

[0031] Preferred embodiments of the present invention will be specifically described below based on Examples and Comparative Examples, but the present invention is not limited to these Examples.

[0032] (1) Preparation method of grease composition

[0033] A grease composition (sample oil) was prepared, and the following components were adjusted to the compounding quantities (% by weight) shown in Table 1 and Table 2.

[0034]

[0035] Polyα-olefin A: The product name is "DURASYN164" (manufactured by INEOS OLIGOMERS JAPAN CORPORATION, dynamic viscosity at 40°C is 18mm 2 / s)

[0036] Polyα-olefin B: the product name is "DURASYN166" (manufactured by INEOS OLIGOMERS JAPAN CORPORATION, dynamic viscosity at 40°C is 30mm 2 / s)

[0037] Polyα-olefin C: the product name is "DURASYN174" (manufactured by INEOS OLIGOMERS JAPAN CORPORATION, dynamic viscosity at 40°C is 390mm 2 / s)

[0038] Polyα-olefin D: The product name is "DURASYN162" (manufactured by INEOS OLIGOMERS JAPAN CORP...

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Abstract

The purpose of the present invention is to provide a lubricating grease composition which has a high coefficient of static friction, while maintaining excellent torque characteristics at low temperatures, shear stability at high temperatures and oil separation characteristics at high temperatures. A lubricating grease composition according to the present invention contains a base oil, a thickeningagent and a solid lubricant, and is characterized in that: the solid lubricant is composed of calcium carbonate; the blending amount of the calcium carbonate is 1-60% by weight relative to the totalweight of the lubricating grease composition; the calcium carbonate has an average particle diameter of 0.1-30 Mum; the base oil has a kinematic viscosity of 18-300 mm2/s at 40DC; and the lubricatinggrease composition has a worked penetration of 240-320.

Description

technical field [0001] The present invention relates to a grease composition having a high coefficient of static friction while maintaining excellent low-temperature torque characteristics, high-temperature shear stability, and high-temperature oil separation characteristics. Background technique [0002] So far, grease has been used as a lubricant for gears and sliding parts. In recent years, in automotive parts, home appliances, electronic information equipment, OA equipment, etc., the use of resin parts for gears and sliding parts has gradually increased in order to reduce weight and cost. Among them, excellent low-temperature torque characteristics, high-temperature shear stability, and high-temperature oil separation characteristics are required for greases used between resin parts or between resin parts and metal parts. In addition, in recent years, in reduction gear units in reduction gears of automobiles and OA equipment, etc., greases are required to have a high co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M125/10C10M169/06C10M101/02C10M105/04C10M107/02C10M117/00C10N10/04C10N20/00C10N20/02C10N20/06C10N30/00C10N40/02C10N40/04C10N50/10
CPCC10M169/06C10M101/02C10M105/04C10M107/02C10M117/00C10M125/10C10N2050/10C10N2010/04C10M169/02C10M2207/1285C10N2010/02C10N2030/06C10M2201/062C10M2207/1265C10N2040/02C10N2020/02C10N2020/06C10M117/02C10M2201/0623C10M2207/1206C10M2207/1256
Inventor 泽口涉松本孝平
Owner NOK KLUEBER CO LTD
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