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Grease composition

A technology of lubricating grease composition and compound, which is applied in the direction of lubricating composition, base material, thickener, etc., can solve the problems of reducing the oil film formation energy of lubricating parts, poor lubrication, etc., and achieve excellent long-term reliability, lubricity and friction good effect

Inactive Publication Date: 2015-02-11
JX NIPPON OIL & ENERGY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, lowering the viscosity reduces the oil film formation ability of the lubricated part, so it is necessary to take into account the occurrence of poor lubrication, so there is a limit

Method used

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  • Grease composition
  • Grease composition
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Examples

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Embodiment 1～28、 comparative example 1～17

[0103] In Examples 1 to 28 and Comparative Examples 1 to 17, grease compositions having the compositions shown in Tables 1 to 6 were prepared using the base oils, thickeners, and additives shown below, respectively.

[0104] (A) base oil

[0105] (A-1) Mineral oil: Paraffin-based refined mineral oil (kinematic viscosity at 40°C: 93.3mm 2 / s, viscosity index 95, pour point -15°C, flash point 260°C)

[0106] (A-2) Polyol ester (POE): The ester formed by the mixed acid of 2-ethylhexanoic acid and 3,5,5-trimethylhexanoic acid in a mass ratio of 5:5 and pentaerythritol (at 40°C The kinematic viscosity is 66.7mm 2 / s, viscosity index 92, pour point -40°C, flash point 248°C)

[0107] (A-3) Polyalkylene glycol (PAG): polyoxypropylene capped with methyl groups at both ends (weight average molecular weight 1000, kinematic viscosity at 40°C 46.0mm 2 / s, viscosity index 190, pour point -45°C, flash point 218°C)

[0108] (A-4) Poly-α-olefin (PAO): a polymer of 1-dodecene (kinematic vi...

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Abstract

This grease composition contains: at least one base oil that is selected from among mineral oil-based base oils and synthetic oil-based base oils; and 2-35% by mass of a thickening agent, 0.05-5% by mass of an epoxy compound and 0.1-20% by mass of a wear-resistant additive, each based on the total amount of the grease composition. A grease of the present invention exhibits good stability, lubricity and friction characteristics even under severe conditions of use and has excellent long-term reliability in comparison to conventional greases.

Description

technical field [0001] This invention relates to grease compositions. Background technique [0002] Grease is used as a lubricant in bearings and constant velocity joints in devices such as power transmission mechanisms today. [0003] In recent years, devices such as power transmission mechanisms tend to be more sophisticated, high-performance, high-speed, miniaturized, and have a longer life. Bearings, constant velocity joints, etc. are used under high-load conditions. Therefore, in order to maintain stable lubricating properties over a long period of time, the required level of grease properties, especially stability and lubricity, which are basic performances, has been further increased. [0004] In addition, in a relatively low-speed rotating bearing system or a device with many bearing positions, the energy-saving effect by reducing friction is high. Therefore, the correspondence based on the reduction of the viscosity of the base oil used for a grease was examined. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/02C10M101/02C10M105/36C10M105/38C10M107/34C10M115/08C10M117/02C10M125/02C10M125/22C10M125/26C10M129/06C10M129/16C10M129/18C10M129/40C10M129/54C10M129/76C10M133/06C10M133/16C10M135/06C10M135/10C10M135/18C10M135/22C10M135/30C10M137/04C10M137/08C10M137/10C10M147/02C10M159/22C10M159/24C10N10/02C10N10/04C10N10/06C10N10/12C10N30/06C10N40/04C10N50/10
CPCC10M2215/04C10M2215/1026C10M2207/1285C10M2219/083C10N2240/04C10M169/02C10M2219/068C10N2230/52C10M2207/289C10M2201/041C10M2203/1006C10N2220/022C10N2250/10C10M2223/041C10N2220/082C10M2207/042C10M2207/2835C10N2230/10C10M169/06C10N2230/06C10N2220/023C10M2205/0285C10M2223/045C10N2240/02C10M2219/082C10M2219/046C10M2209/1055C10N2020/011C10N2020/06C10N2020/02C10N2030/10C10N2030/52C10N2040/04C10N2030/06C10N2040/02C10N2050/10C10M2209/1085C10N2010/12C10N2010/02C10N2010/04
Inventor 荒井孝菖蒲祐辅设乐裕治
Owner JX NIPPON OIL & ENERGY CORP
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