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Grease composition

Inactive Publication Date: 2015-01-22
JX NIPPON OIL & ENERGY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The grease composition in this patent has excellent properties of resisting water, mechanical stability, and heat. It is particularly strong against wear when metal parts slide against each other at a high speed and with a heavy load. Additionally, it retains its effectiveness even after long periods of use under high temperatures.

Problems solved by technology

Grease has been mainly used for slide bearings, rolling bearings, and sliding surfaces where it is difficult to maintain adhesion of a lubricant film due to the movement of the contact surface.
However, the above grease composition is insufficient in terms of lubricity and particularly wear resistance, and shows a deterioration in wear resistance during long-term use at a high temperature.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

examples

1. Lubricant Base Oil

(1) Mineral Oil-Based Lubricant Base Oil

[0055]Lubricant base oil obtained by distilling atmospheric distillation residue under reduced pressure and subjecting the resulting distillate to solvent refining[0056]Kinematic viscosity at 40° C.: 68 mm2 / s[0057]Density at 15° C.: 0.87 g / cm3 [0058]Viscosity index: 100[0059]Pour point: −10° C.[0060]Flash point: 250° C.

(2) Synthetic Lubricant Base Oil

[0061]Poly-α-olefin (“Durasyn 170” manufactured by INEOS)[0062]Kinematic viscosity at 40° C.: 68 mm2 / s[0063]Density at 15° C.: 0.83 g / cm3 [0064]Viscosity index: 133[0065]Pour point: −45° C.[0066]Flash point: 250° C.

2. Amide Compound

2-1. Aliphatic Amide

[0067](1) Ethylene bis-stearic acid amide (special grade reagent)[0068](2) Ethylene bis-oleic acid amide (special grade reagent)[0069](3) Stearic acid monoamide (special grade reagent)

2-2. Aromatic Amide

[0070](1) m-Xylylene bis-stearic acid amide (special grade reagent)

3. Solid Lubricant

[0071](1) Melamine cyanulate (MCA, average ...

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PUM

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Abstract

Provided is a grease composition that has high lubricity, particularly excellent wear resistance, and shows only a small extent of deterioration in wear resistance with long-term use under high temperatures.The grease composition comprises at least one base oil selected from a mineral oil-based lubricant base oil and a synthetic lubricant base oil, an amide compound, a solid lubricant, and a urea-based thickener, wherein the amide compound is heated and melted at least once with the base oil.

Description

TECHNICAL FIELD[0001]The invention relates to a grease composition that utilizes a urea-based thickener.BACKGROUND ART[0002]Grease has been mainly used for slide bearings, rolling bearings, and sliding surfaces where it is difficult to maintain adhesion of a lubricant film due to the movement of the contact surface. In particular, urea-based grease that utilizes a urea-based thickener exhibits excellent water resistance, mechanical stability, and heat resistance, and has been widely used for metal-metal sliding parts at a low speed with a high load such as an automotive constant-velocity joint.[0003]A grease composition that comprises a base oil, an organomolybdenum compound (e.g., a molybdenum dialkyldithiocarbamate sulfide), a molybdenum disulfide, a zinc dithiophosphate compound, and an aliphatic amide has been proposed as a grease composition used for a constant-velocity joint (see PTL 1 to 3).[0004]However, the above grease composition is insufficient in terms of lubricity and ...

Claims

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Application Information

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IPC IPC(8): C10M169/06
CPCC10M169/06C10M169/00C10M2201/061C10M2203/1006C10M2205/0285C10M2213/062C10M2215/064C10M2215/0813C10M2215/1026C10M2215/221C10M2215/222C10N2220/022C10N2220/023C10N2220/032C10N2220/082C10N2230/06C10N2240/02C10N2240/04C10N2240/046C10N2250/10C10N2270/00C10N2020/011C10N2020/017C10N2020/06C10N2020/02C10N2030/06C10N2040/02C10N2040/046C10N2040/04C10N2070/00C10N2050/10
Inventor AYAME, YUSUKESAKAI, KAZUMISHITARA, YUJI
Owner JX NIPPON OIL & ENERGY CORP
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