CN101724495B - Perfluoropolyether lubricating grease composition - Google Patents
Perfluoropolyether lubricating grease composition Download PDFInfo
- Publication number
- CN101724495B CN101724495B CN200910206592.1A CN200910206592A CN101724495B CN 101724495 B CN101724495 B CN 101724495B CN 200910206592 A CN200910206592 A CN 200910206592A CN 101724495 B CN101724495 B CN 101724495B
- Authority
- CN
- China
- Prior art keywords
- lubricating grease
- grease composition
- perfluoropolyether lubricating
- silver powder
- perfluoropolyether
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 74
- 239000004519 grease Substances 0.000 title claims abstract description 72
- 230000001050 lubricating effect Effects 0.000 title claims abstract description 64
- 239000010702 perfluoropolyether Substances 0.000 title claims abstract description 56
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 40
- 241000555268 Dendroides Species 0.000 claims description 25
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 claims description 17
- 238000002156 mixing Methods 0.000 claims description 14
- 239000002245 particle Substances 0.000 claims description 12
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 16
- 238000000034 method Methods 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 12
- 239000006229 carbon black Substances 0.000 description 9
- 239000011787 zinc oxide Substances 0.000 description 8
- 239000003921 oil Substances 0.000 description 7
- 230000003068 static effect Effects 0.000 description 7
- 239000011164 primary particle Substances 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000000654 additive Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000008719 thickening Effects 0.000 description 3
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000005016 dendritic process Effects 0.000 description 2
- 229910052733 gallium Inorganic materials 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000002199 base oil Substances 0.000 description 1
- 230000000739 chaotic effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001493 electron microscopy Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- -1 sanitas Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M125/00—Lubricating compositions characterised by the additive being an inorganic material
- C10M125/04—Metals; Alloys
Abstract
The invention relates to a perfluoropolyether lubricating grease composition at least containing perfluoropolyether and branch shaped silver powder; the matching amount of the branch shaped silver powder is preferably between 5wt% and 60wt% relative to the perfluoropolyether lubricating grease composition; The invention provides a non-black perfluoropolyether lubricating grease composition with excellent conductivity and low friction coefficient.
Description
Technical field
The present invention relates to Perfluoropolyether lubricating grease composition, in detail, relate to the non-black lubricating grease mixture with high conductivity.
Background technology
In recent years, high performance, the miniaturization of office instrument and information-based instrument etc. are remarkable.Wherein, be accompanied by parts in movable part rotation, slip etc. each other and produce static, exist static easily to accumulate in the problem of instrument internal.Accumulate in the static of instrument internal, sometimes instrument system is produced to detrimentally affect, go up therefore proposed the electroconductive grease mixture to be coated on the parts etc. of movable part, static is evicted to the countermeasure of instrument outside.
As this electroconductive grease mixture, invest agent and thickening material as electroconductibility, the general lubricating grease mixture (for example,, with reference to examined patent publication 63-24038 communique) adopting containing carbon black.In addition, JP 2007-2182 communique is recorded and has a kind ofly been adulterated aluminium or gallium and give the lubricating grease mixture that contains zinc oxide of electroconductibility.
But, contain the lubricating grease mixture that invests the carbon black of agent and thickening material as electroconductibility, by rotation, the slip of parts, carbon black particle through time chain structure is destroyed, point oil content (oil separation) becomes unstable.
Summary of the invention
The problem that invention will solve
In addition, containing the lubricating grease mixture of carbon black, frictional coefficient is high, while coating, sometimes can not long-time continuous slide smoothly on parts.
Further, because the lubricating grease mixture containing carbon black is black, while coating on parts, degraded appearance, there is the situation that is subject to black pollution in the user's of end article hand and clothes.
On the other hand, adulterate aluminium or gallium and given the lubricating grease mixture that contains zinc oxide of electroconductibility, with compared with the lubricating grease mixture of carbon black, had the problem of electroconductibility significance difference.
The object of this invention is to provide the non-black electroconductive grease composition that a kind of frictional coefficient is low.
For solving the means of problem
The present invention relates at least Perfluoropolyether lubricating grease composition of perfluoro-polyether and dendroid silver powder.Above-mentioned Perfluoropolyether lubricating grease composition, mixing consistency preferably more than 200, below 380, volume specific resistance preferably 0～10
4Ω cm.Above-mentioned Perfluoropolyether lubricating grease composition, can be hinged with the use of electroconductive grease grease composition as mobile phone suitably.
Above-mentioned Perfluoropolyether lubricating grease composition, preferably also contains tetrafluoroethylene, and the relatively above-mentioned Perfluoropolyether lubricating grease composition of the content of tetrafluoroethylene is that 1 quality % is above, 60 quality % are preferred below.
The content of above-mentioned dendroid silver powder, relatively above-mentioned Perfluoropolyether lubricating grease composition, preferably 5 quality % above, below 50 quality %.In addition, above-mentioned dendroid silver powder, particle diameter preferably 0.05 μ m above, below 10 μ m.
Invention effect
Perfluoropolyether lubricating grease composition of the present invention, has high conductivity, the feature that friction resistance is little owing to containing dendroid silver powder.Perfluoropolyether lubricating grease composition of the present invention is useful as the lubricant of removing electroconductibility sliding component that static etc. is object, drive member, bearing etc.In addition, owing to being non-black, there is following characteristics: while coating, outward appearance is good on parts, even if adhere to also inconspicuous on user's hand and clothes.
Brief description of the drawings
Fig. 1 is the side elevational view of a measuring friction coefficient device part.
The explanation of symbol
1 weight
2 1/2 inches of steel balls
3 Perfluoropolyether lubricating grease compositions
4 SPCC-SB steel plates
5 load cells
Embodiment
Dendroid silver powder, gives Perfluoropolyether lubricating grease composition of the present invention with electroconductibility.The content of dendroid silver powder, relatively Perfluoropolyether lubricating grease composition preferably 5 quality % above, below 60 quality %.When the content of dendroid silver powder is during lower than 5 quality %, can not get sufficient electroconductibility, on the other hand, in the time that the content of dendroid silver powder is greater than 60 quality %, be uneconomic, sometimes make the frictional coefficient of Perfluoropolyether lubricating grease composition of the present invention strengthen.
So-called dendroid, is included in silver powder surface and has hyperbranched irregular dendritic processes.All to have dendritic processes be preferred on silver powder surface, but also can a part of silver powder surface in the form of sheets or block, the irregular projection of dendroid on surface also can partly lose.
Above-mentioned dendroid silver powder considers from electroconductibility and dispersed viewpoint, general preferable particle size be 0.05 μ m above, below 10 μ m, more preferably 0.1 μ m above, below 5 μ m.Particle diameter, can for example represent with the volume accumulation meta particle diameter (Median footpath) by laser diffraction and scattering formula particle size distribution method.In addition, the jolt ramming tamped density of dendroid silver powder, generally in 0.3～4.0g/cm
3scope, preferably in 0.4～3.0g/cm
3scope.
PFPE, is the base oil of Perfluoropolyether lubricating grease composition of the present invention, and the kind of PFPE, is not particularly limited.PFPE, due to stabilizer pole chemically, inertia, has following characteristics: even difficult decomposition still under high temperature, even in the time of coating, also on parts almost without affecting.
The kinematic viscosity of PFPE, preferably reaches 10mm 40 DEG C time
2/ s is above, 500mm
2below/s.When kinematic viscosity is lower than 10mm
2when/s, point oil content of Perfluoropolyether lubricating grease composition becomes insufficient sometimes, is greater than 500mm and work as kinematic viscosity
2when/s, the denseness of the grease composition obtaining declines, and operation task is variation sometimes.
In addition, for making the denseness of Perfluoropolyether lubricating grease composition more stable, also can use tetrafluoroethylene as thickening material.The primary particle size of tetrafluoroethylene, by the value of determination of electron microscopy, generally more than 0.1 μ m, below 1.0 μ m.
The mixing consistency of Perfluoropolyether lubricating grease composition of the present invention, preferably more than 220, below 340.When mixing consistency is lower than 220 time, be difficult to be coated with on parts, in addition, when life-time service, there is the worry that can not slide.In addition, in the time that mixing consistency is greater than 340, it is soft that grease composition became, and has the worry spilling from parts.
The volume specific resistance of Perfluoropolyether lubricating grease composition of the present invention preferably 0～10
4Ω cm, more preferably 5～10
3Ω cm.Volume specific resistance (Ω cm), adopts the disk electrode of diameter 2cm to clamp, so that the thickness of Perfluoropolyether lubricating grease composition reaches 0.2cm, calculates with digital volt-ohm-milliammeter in 25 DEG C of mensuration resistance between electrode values (Ω).
Perfluoropolyether lubricating grease composition of the present invention, has following characteristics: electroconductibility is high, and this electroconductibility can keep high level for a long time.Therefore, Perfluoropolyether lubricating grease composition of the present invention, can, to remove static as object, be suitable as the lubricating grease mixture using on the position that needs electroconductibility.
In addition, in Perfluoropolyether lubricating grease composition of the present invention, as additive, can, according to purposes, add the various additives such as oxidation inhibitor, extreme pressure agent, oiliness improver, rust-preventive agent, sanitas, metal passivator, dyestuff, form and aspect stablizer, tackifier, structural stabilizing agent, UV light absorber.
Perfluoropolyether lubricating grease composition of the present invention, can adopt known method manufacture now to make.Concrete is, for example, mix to manufacture with dendroid silver powder and/or tetrafluoroethylene by PFPE, in addition, in advance PFPE is mixed with tetrafluoroethylene, grind and carry out after attrition process by roller, add dendroid silver powder and and various additive, mix, stirring, deaeration manufacture.
In addition, also can be as required after aforesaid operations, independent or compoundly filter, reduce pressure, pressurization, overheated, cooling, inert gas replacement etc.
Embodiment
, explain the present invention by embodiment below, but the present invention is not limited by following examples again.In addition, the whole grease compositions of the numeric representation in table 1 are as the quality % of each composition of 100 o'clock.
[measuring method of the volume specific resistance of Perfluoropolyether lubricating grease composition]
Clamp with the disk electrode of diameter 2cm, so that the thickness of Perfluoropolyether lubricating grease composition reaches 0.2cm, measure resistance between electrode value (Ω) with digital volt-ohm-milliammeter, calculate volume specific resistance (Ω cm).Measure in 25 DEG C and carry out.
[measuring method of frictional coefficient]
Adopt the device shown in Fig. 1, Perfluoropolyether lubricating grease composition, on the SPCC-SB steel plate of the thickness coating with about 0.1mm, place 1/2 inch of steel ball, at loading 1.96N, sliding velocity 30cpm, sliding distance 40mm, measure under the condition of 25 DEG C of temperature, the circulation of sliding comes and goes dynamic test 1000 times.By load cell, the frictional force of exporting from recording gauge, calculates the circulation of sliding and tests the frictional coefficient of Hous 1000 times.
[mixing consistency]
Mixing consistency is according to the measurement result of 1/2 grade (scale) of the method mensuration specifying in JIS K22207.
[embodiment 1～3]
After PFPE shown in table 1, dendroid silver powder and/or tetrafluoroethylene are stirred, grind and carry out, after attrition process, carrying out deaeration with 3 rollers, obtain yellowish grey Perfluoropolyether lubricating grease composition.Evaluate volume specific resistance, frictional coefficient, the mixing consistency of the yellowish grey Perfluoropolyether lubricating grease composition obtaining respectively.Acquired results is shown in table 1.
[comparative example 1]
After PFPE shown in table 1, carbon black and tetrafluoroethylene are stirred, grind and carry out, after attrition process, carrying out deaeration with 3 rollers, obtain black Perfluoropolyether lubricating grease composition.Volume specific resistance, frictional coefficient, the mixing consistency of the black Perfluoropolyether lubricating grease composition that evaluation obtains.Acquired results is shown in table 1.
[comparative example 2]
After PFPE shown in table 1 and tetrafluoroethylene are stirred, carry out, after attrition process, carrying out deaeration with 3 rollers mills, obtain white Perfluoropolyether lubricating grease composition.The volume specific resistance of the white Perfluoropolyether lubricating grease composition that evaluation obtains, frictional coefficient, mixing consistency.Acquired results is shown in table 1.
[comparative example 3]
After PFPE shown in table 1, electroconductive zinc oxide A and tetrafluoroethylene are stirred, grind and carry out, after attrition process, carrying out deaeration with 3 rollers, obtain white Perfluoropolyether lubricating grease composition.The volume specific resistance of the white Perfluoropolyether lubricating grease composition that evaluation obtains, frictional coefficient, mixing consistency.Acquired results is shown in table 1.
[comparative example 4]
After PFPE shown in table 1, electroconductive zinc oxide B and tetrafluoroethylene are stirred, grind and carry out, after attrition process, carrying out deaeration with 3 rollers, obtain light green Perfluoropolyether lubricating grease composition.Volume specific resistance, frictional coefficient, the mixing consistency of the light green Perfluoropolyether lubricating grease composition that evaluation obtains.Acquired results is shown in table 1.
[comparative example 5]
The kinematic viscosity of 40 DEG C is 160mm
2the PFPE 25 quality % of/s and flakey silver powder (median size 3.6 μ m, the about 4.8g/cm of jolt ramming tamped density
3) after 65 quality % and tetrafluoroethylene 10% stir, carry out, after attrition process, carrying out deaeration with 3 rollers mills, obtain light gray Perfluoropolyether lubricating grease composition.The volume specific resistance of the light gray Perfluoropolyether lubricating grease composition obtaining is 4 × 10
13Ω cm, frictional coefficient are 0.25.
[table 1]
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative example 1 | Comparative example 2 | Comparative example 3 | Comparative example 4 | |
| Dendroid silver powder | 30 | 23 | 30 | ||||
| PFPE oil | 60 | 77 | 45 | 85 | 70 | 59 | 67 |
| PTFE | 10 | 25 | 10 | 30 | 10 | 9 | |
| Carbon black | 5 | ||||||
| Electroconductive zinc oxide A | 31 | ||||||
| Electroconductive zinc oxide B | 24 | ||||||
| Color | Yellowish grey | Yellowish grey | Yellowish grey | Black | White | White | Light green |
| Volume specific resistance (Ω cm) | 2×10 1 | 3×10 1 | 4×10 1 | 1×10 1 | 1×10 14 | 3×10 14 | 4×10 6 |
| Frictional coefficient (1000 circulation) | 0.13 | 0.10 | 0.15 | 0.30 | 0.25 | 0.14 | 0.21 |
| Mixed denseness | 300 | 300 | 260 | 200 | 290 | 285 | 110 |
In table 1:
Dendroid silver powder: all surfaces is dendritic dendroid silver powder (particle diameter approximately 1.2 μ m, the about 0.8g/cm of jolt ramming tamped density
3)
PFPE oil: (kinematic viscosity of 40 DEG C is 160mm to PFPE
2/ s)
PTFE: (primary particle size approximately 0.3 μ m) for tetrafluoroethylene
Carbon black: ケ Star チ エ Application Block ラ Star Network EC (ケ Star チ エ Application Block ラ Star Network イ Application タ mono-Na シ ヨ Na Le (strain) manufacture, electroconductibility invest agent, primary particle size 39.5nm)
Electroconductive zinc oxide A: the 23-K (primary particle size 120～250nm) that Ha Network ス イ テ Star Network (strain) is manufactured
Electroconductive zinc oxide B: the Pazet GK-40 (primary particle size 20～40nm) that Ha Network ス イ テ Star Network (strain) is manufactured
[embodiment 4～5, comparative example 6～7]
After PFPE shown in table 2, dendroid silver powder and tetrafluoroethylene are stirred, grind and carry out, after attrition process, carrying out deaeration with 3 rollers, obtain Perfluoropolyether lubricating grease composition.Evaluate volume specific resistance, frictional coefficient, the mixing consistency of the Perfluoropolyether lubricating grease composition obtaining respectively.Acquired results is shown in table 2.
[table 2]
| Embodiment 4 | Embodiment 5 | Comparative example 6 | Comparative example 7 | |
| Silver powder A | 50 | |||
| Silver powder B | 50 | |||
| Silver powder C | 64 | |||
| Silver powder D | 64 | |||
| PFPE oil | 43 | 45 | 36 | 36 |
| PTFE | 7 | 5 | ||
| Color | Yellowish grey | Yellowish grey | Silver color | Silver color |
| Volume specific resistance (Ω cm) | 5×10 1 | 5×10 1 | 1×10 13 | 2×10 12 |
| Frictional coefficient (1000 circulation) | 0.15 | 0.16 | 0.22 | 0.24 |
| Mixing consistency | 325 | 240 | 380 | 380 |
In table 2:
Silver powder A: the part on surface is block dendroid silver powder (particle diameter approximately 4.0 μ m, the about 1.7g/cm of jolt ramming tamped density
3)
Silver powder B: the part on surface is block dendroid silver powder (particle diameter approximately 3.0 μ m, the about 1.5g/cm of jolt ramming tamped density
3)
Silver powder C: flake silver powder (particle diameter 1.6 μ m, the about 4.6g/cm of jolt ramming tamped density
3)
Silver powder D: the part on surface is block dendroid silver powder (particle diameter approximately 7 μ m, the about 4.2g/cm of jolt ramming tamped density
3)
PFPE oil: (kinematic viscosity of 40 DEG C is 160mm to PFPE
2/ s)
PTFE: (primary particle size approximately 0.2 μ m) for tetrafluoroethylene
In industry, utilize possibility
Perfluoropolyether lubricating grease composition of the present invention, has that electroconductibility is high, this electroconductibility feature that high level keeps for a long time, in addition, has the feature that keeps the good oilness that long-time friction resistance is low.Therefore, Perfluoropolyether lubricating grease composition of the present invention, is preferably used as and removes swivel bearing/sliding surface bearing, turn, bolt, cam, guide groove, path, driving screw, gear, tooth bar, chain, the moving lubricant holding that electroconductive component that static etc. is object forms.As concrete purposes, for example, the image when answering sensitivity and prevent single hop (oneseg) audiovisual in order improving mobile phone is chaotic with object, can be used as the hinged lubricating grease mixture of using of mobile phone.
Claims (4)
1. Perfluoropolyether lubricating grease composition, it at least contains PFPE and dendroid silver powder, the relative Perfluoropolyether lubricating grease composition of use level of dendroid silver powder is more than 5 quality %, below 60 quality %, the particle diameter of dendroid silver powder is more than 0.05 μ m, below 10 μ m, the mixing consistency of Perfluoropolyether lubricating grease composition is more than 200, below 380, and volume specific resistance is 0～10
4Ω cm.
2. according to Perfluoropolyether lubricating grease composition claimed in claim 1, it also contains tetrafluoroethylene.
3. according to Perfluoropolyether lubricating grease composition claimed in claim 2, it is characterized in that, the relative Perfluoropolyether lubricating grease composition of use level of tetrafluoroethylene is more than 1 quality %, below 50 quality %.
4. according to the Perfluoropolyether lubricating grease composition described in any one of claim 1～3, it is characterized in that, as the hinged use of mobile phone.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008-272041 | 2008-10-22 | ||
| JP2008272041 | 2008-10-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101724495A CN101724495A (en) | 2010-06-09 |
| CN101724495B true CN101724495B (en) | 2014-10-15 |
Family
ID=42219370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910206592.1A Expired - Fee Related CN101724495B (en) | 2008-10-22 | 2009-10-22 | Perfluoropolyether lubricating grease composition |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2010121123A (en) |
| KR (1) | KR20100044722A (en) |
| CN (1) | CN101724495B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015232128A (en) * | 2014-05-15 | 2015-12-24 | 大同メタル工業株式会社 | Resin composition for sliding and sliding member |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4200541A (en) * | 1976-12-06 | 1980-04-29 | National Research Development Corporation | Bearing materials |
| CN1422939A (en) * | 2000-11-29 | 2003-06-11 | 日本精工株式会社 | Conductive lubricating grease and rolling device filled with same |
-
2009
- 2009-10-22 KR KR1020090100523A patent/KR20100044722A/en not_active Application Discontinuation
- 2009-10-22 CN CN200910206592.1A patent/CN101724495B/en not_active Expired - Fee Related
- 2009-10-22 JP JP2009242982A patent/JP2010121123A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4200541A (en) * | 1976-12-06 | 1980-04-29 | National Research Development Corporation | Bearing materials |
| CN1422939A (en) * | 2000-11-29 | 2003-06-11 | 日本精工株式会社 | Conductive lubricating grease and rolling device filled with same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101724495A (en) | 2010-06-09 |
| JP2010121123A (en) | 2010-06-03 |
| KR20100044722A (en) | 2010-04-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5035315B2 (en) | Perfluoropolyether oil composition | |
| Pawlak et al. | A comparative study on the tribological behaviour of hexagonal boron nitride (h-BN) as lubricating micro-particles—an additive in porous sliding bearings for a car clutch | |
| Abad et al. | Tribological properties of surface-modified Pd nanoparticles for electrical contacts | |
| KR20070054179A (en) | Lubricant | |
| CN101724493A (en) | Perfluoropolyether lubricating grease composition | |
| CN101724494A (en) | Perfluoropolyether lubricating grease composition | |
| CN101724495B (en) | Perfluoropolyether lubricating grease composition | |
| WO2008004613A1 (en) | Grease composition and bearing | |
| JP4242610B2 (en) | Water-soluble lubricant composition | |
| US20220074840A1 (en) | Method of inspecting lubricating oil composition and method of producing lubricating oil composition | |
| del Río et al. | Surface tension, wettability and tribological properties of a low viscosity oil using CaCO3 and CeF3 nanoparticles as additives | |
| JP2008037892A (en) | Grease composition and bearing | |
| JPH11246886A (en) | Rolling device | |
| EP1498472B1 (en) | Use of a Grease Composition in a Rolling Bearing | |
| JP6166448B1 (en) | Lubricant composition, grease composition, diluted lubricant solution, sliding member | |
| JP2983778B2 (en) | Lubricant composition for ball joints | |
| US20110065615A1 (en) | Reduced molybdenum grease formulation | |
| JP4714977B2 (en) | Lubrication method for rolling bearings | |
| JP2925449B2 (en) | Hot rolling lubricant and method of supplying hot rolling lubricant | |
| JP6770165B1 (en) | Polishing method, manufacturing method of machinery and machinery | |
| JP2004076003A (en) | Method for lubrication of machine element parts | |
| CN117210264B (en) | Modified lubricating grease with low friction coefficient and application | |
| JP7315153B2 (en) | Coating composition for sliding member and sliding member | |
| Zhang et al. | Synthesis, Tribological Properties and Mechanism of Nickel Nanoparticles as Additives in Lithium Grease | |
| JPH0551588A (en) | Method of lubricating oil-retaining bearing, oil-retaining bearing, and lubricating oil for oil-retaining bearing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141015 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |