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Lubricant composition and sliding mechanism using the lubricant composition

A technology of lubricating oil composition and sliding mechanism, applied in the field of sliding mechanism and lubricating oil composition, can solve problems such as increase in friction coefficient, and achieve the effect of excellent low friction

Inactive Publication Date: 2012-07-18
IDEMITSU KOSAN CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Lubricating oil compositions for low-friction sliding materials are being developed in this way, but even when these technologies are applied, when ZnDTP is mixed in order to further improve wear resistance, etc., the friction coefficient tends to increase

Method used

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  • Lubricant composition and sliding mechanism using the lubricant composition
  • Lubricant composition and sliding mechanism using the lubricant composition
  • Lubricant composition and sliding mechanism using the lubricant composition

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0082] In the preparation of the phosphorus-zinc-containing compound used in the present invention 1, a phosphorus-containing compound represented by the general formula (I) is used.

[0083] [chemical 9]

[0084]

[0085] (I) In the formula, X 1 、X 2 Represents an oxygen atom or a sulfur atom. R 1 Represents an organic group containing an oxygen atom or a sulfur atom and having 2 to 30 carbon atoms. n is an integer selected from 1-3. Especially preferred X 1 、X 2 A compound in which at least one is an oxygen atom.

[0086] Among the phosphorus-containing compounds represented by the formula (I), the phosphorus-containing compound represented by the general formula (III) is particularly preferable.

[0087] [chemical 10]

[0088]

[0089] (III) In the formula, R 4 Represents an organic group having 4 to 24 carbon atoms. R 5 Represents a divalent organic group having 1 to 6 carbon atoms. n is an integer selected from 1-3.

[0090] R 4 The organic group is p...

Embodiment 1～3 and comparative example 1～3

[0204] The lubricating oil composition of Invention 1 and the lubricating oil composition for comparison having the compositions shown in Table 1 were prepared, and the friction characteristic test shown below was carried out to obtain the friction coefficient of the sliding mechanism 1. The results are shown in Table 2.

[0205]

[0206] Using a reciprocating friction tester (SRV reciprocating friction tester manufactured by Optimal Corporation), the friction coefficient of the sliding mechanism 1 was measured by the following method.

[0207] Disk with DLC coating (graphite crystal particle size: 20nm) As a test piece, several drops of sample oil (lubricating oil composition) were dropped thereon. Cylinder (Cylinder) manufactured in SCM420 The coefficient of friction in the slide mechanism 1 was obtained under the conditions of a load of 400 N, an amplitude of 1.5 mm, a frequency of 50 Hz, and a temperature of 80° C. while being attached to the upper portion of the d...

Embodiment 4、5、 comparative example 4、5

[0236] The friction characteristics are tested in the same way with the lubricating oil and the sliding member as shown below, and the coefficient of friction is obtained. The results are shown in Table 3.

[0237] (1) lubricating oil

[0238] OIL1: Lubricating oil composed of the lubricating oil composition described in Example 1

[0239] OIL2: Lubricating oil composed of the lubricating oil composition described in Comparative Example 1

[0240] (2) Sliding member (test piece)

[0241] As test pieces, the following DLC ​​film-coated discs were used.

[0242] DLC1: ​​DLC film with graphite crystal peak in X-ray scattering spectrum (graphite crystal particle size: 20nm), hydrogen content 25atom%, made by cathode PIG plasma CVD method.

[0243] DLC2: Hydrogen-containing DLC ​​film without graphite crystal peak in the X-ray scattering spectrum, with a hydrogen content of 30atom%, produced by high-frequency plasma CVD.

[0244] The intermediate layer in the DLC coating consi...

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Abstract

Disclosed is a lubricant composition, which is obtained by blending an additive that is selected from specific phosphorus-zinc-containing compounds and specific sulfur-containing compounds, and which exhibits an extremely low coefficient of friction when used as a lubricant for a low-friction sliding material. Also disclosed is a sliding mechanism having excellently low friction, wherein the lubricant composition is used in combination with a sliding member that has a coating film of a specific low-friction sliding material on the sliding surface. The sliding mechanism is provided with a DLC coating film containing 5-50 atom% of hydrogen, or the sliding mechanism contains 1-30 atom% of tungsten (W) or molybdenum (Mo).

Description

technical field [0001] The present invention relates to a lubricating oil composition and a sliding mechanism using the lubricating oil composition, and more specifically, to a lubricating oil composition exhibiting an extremely low coefficient of friction when used as a lubricating oil for low-friction sliding materials, and to using the lubricating oil composition Sliding mechanisms of oil compositions exhibiting a low coefficient of friction. Background technique [0002] In recent years, responses to environmental issues have become more important in various fields, and technological developments for energy saving and reduction of carbon dioxide emissions are advancing. For example, one of the issues concerning automobiles is the increase in fuel consumption, and technological development of lubricating oil and sliding materials is becoming important. [0003] For lubricating oils, various base oils and additives are being developed for the purpose of improving various ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M137/10C10M135/20C10M137/06C10N10/04C10N30/06
CPCC10M2219/044C10M2215/28C10N2240/10C10M2209/084C10M2215/223C10M2207/026C10M2215/064C10M2201/06C10N2230/06C10N2250/141C10M2223/042C10M2201/041C10N2250/14C10M2223/045C10M2219/046C10M141/10C10M2219/082C10M2203/1006C10N2280/00C10M2207/262C10N2030/06C10N2040/25C10N2080/00C10N2050/023C10N2050/025Y10T428/265Y10T428/30C10N2010/04C10M135/20C10M137/06C10M137/10C10M141/12
Inventor 葛西杜继山田亮辻冈正宪三宅浩二
Owner IDEMITSU KOSAN CO LTD
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