EP3350294A1 - Low-friction sliding mechanism including lubricant composition - Google Patents

Low-friction sliding mechanism including lubricant composition

Info

Publication number
EP3350294A1
EP3350294A1 EP16766019.0A EP16766019A EP3350294A1 EP 3350294 A1 EP3350294 A1 EP 3350294A1 EP 16766019 A EP16766019 A EP 16766019A EP 3350294 A1 EP3350294 A1 EP 3350294A1
Authority
EP
European Patent Office
Prior art keywords
low
coated
lubricant composition
sliding member
sliding mechanism
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.)
Withdrawn
Application number
EP16766019.0A
Other languages
German (de)
French (fr)
Inventor
Kiyoshi Hanyuda
Kenji Oohara
Izumi Kobayashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shell Internationale Research Maatschappij BV
Original Assignee
Shell Internationale Research Maatschappij BV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shell Internationale Research Maatschappij BV filed Critical Shell Internationale Research Maatschappij BV
Publication of EP3350294A1 publication Critical patent/EP3350294A1/en
Withdrawn legal-status Critical Current

Links

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
    • C10M103/00—Lubricating compositions characterised by the base-material being an inorganic material
    • C10M103/02—Carbon; Graphite
    • 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
    • C10M129/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen
    • C10M129/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of less than 30 atoms
    • C10M129/16—Ethers
    • 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
    • C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
    • C10M169/04—Mixtures of base-materials and additives
    • 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
    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/04—Elements
    • C10M2201/041—Carbon; Graphite; Carbon black
    • C10M2201/0413—Carbon; Graphite; Carbon black used as base material
    • 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
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • 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
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/02—Hydroxy compounds
    • C10M2207/021—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms
    • 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
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/04—Ethers; Acetals; Ortho-esters; Ortho-carbonates
    • 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
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/08—Aldehydes; Ketones
    • 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
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/28—Esters
    • 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
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
    • 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
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
    • C10M2209/1033—Polyethers, i.e. containing di- or higher polyoxyalkylene groups used as base material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2080/00—Special pretreatment of the material to be lubricated, e.g. phosphatising or chromatising of a metal

Definitions

  • the present invention relates to a low-friction sliding mechanism including a lubricant composition containing polyalkylene glycol and an acid
  • Lubricants used for machines are required to have higher wear resistance and fuel-saving property. More and more machines, particularly the machines used for an automobile component, which are required to have the fuel-saving property, have come to employ a DLC film for the sliding component.
  • a DLC film for the sliding component.
  • an oily agent such as ester, a fatty acid, and amine have been used, as reported in JP-A-2005-68171.
  • the present invention has been made in view of such circumstances, and an object thereof is to maintain the DLC lubricant system for a long time by further reducing the friction .
  • an adsorbate derived from an ash-free friction modifier formed between the DLC film and the metal is changed into the material more effective in reducing the friction by adding a higher alcohol mainly containing polyalkylene glycol (PAG) , and this provides the synergistic effect of PAG and the ash-free friction modifier, particularly an acid oxygen-containing organic compound.
  • PAG polyalkylene glycol
  • An aspect of the present invention is a low-friction sliding mechanism including a lubricant composition on a sliding plane between a DLC-coated sliding member (A) and a sliding member (B) .
  • the DLC-coated sliding member (A) is formed by coating a base material with
  • the sliding member (B) includes at least one kind of material selected from the group consisting of a metal material, a non-metal material, and a metal or non-metal coated material having a surface coated with a thin film.
  • the lubricant composition contains a basic oil (C) , PAG (D) , and an acid oxygen-containing organic compound (E) with an acid number of more than 1 mgKOH/g.
  • the diamond-like-carbon contain 0.5 atom% or less of hydrogen.
  • a further embodiment of the present invention is a low-friction sliding mechanism including a lubricant composition on a sliding plane between a DLC-coated sliding member (A) and a sliding member (B) .
  • the DLC-coated sliding member (A) is formed by coating a base material with a-C diamond-like-carbon without hydrogen.
  • the sliding member (B) includes at least one kind of material selected from the group consisting of a metal material, a non-metal material, and a metal or non-metal coated material having a surface coated with a thin film.
  • the lubricant composition contains a basic oil (C) , PAG (D) , and an acid oxygen-containing organic compound (E) with an acid number of more than 1 mgKOH/g.
  • the metal material of the sliding member (B) is at least one kind of material selected from the group consisting of a material containing iron, a material containing aluminum alloy, and a material containing magnesium alloy .
  • the coated material is formed by being coated with the thin film of at least one kind of material selected from the group consisting of DLC and ceramics .
  • the PAG (D) is at least one kind selected from the group consisting of polyethylene glycol, polypropylene glycol, and polybutylene glycol.
  • the PAG (D) has a weight-average molecular weight of from 200 to 10, 000.
  • the PAG (D) is present in an amount in the range of from 0.1 to 20.0% based on the entire amount of the lubricant composition.
  • the acid oxygen-containing organic compound (E) has a carbon number of 8 to 1,000.
  • the acid number of the acid oxygen-containing organic compound (E) is 1.2 mgKOH/g or more .
  • the lubricant composition contains the acid oxygen-containing organic compound (E) in an amount in the range of from 0.05 to 5.0% based on the entire lubricant composition. It is also preferred that the acid oxygen-containing organic compound (E) contains at least one kind selected from the group consisting of alcohols, esters, ethers, ketones, aldehydes, carbonates, and derivatives thereof.
  • the present invention also provides a lubricant system including the low-friction sliding mechanism as described herein.
  • the function of reducing the friction of DLC can be further increased by adding an acid oxygen-containing organic compound to a system with PAG added to a basic oil.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Lubricants (AREA)
  • Sliding-Contact Bearings (AREA)
  • Chemical Vapour Deposition (AREA)

Abstract

The present invention provides a low-friction sliding mechanism comprising a lubricant composition on a sliding plane between a DLC-coated sliding member (A) and a sliding member (B), wherein the DLC-coated sliding member (A) is formed by coating a base material with diamond-like-carbon containing 10 atom% or less of hydrogen, the sliding member (B) includes at least one kind of material selected from the group consisting of a metal material, a non-metal material, and a metal or non-metal coated material having a surface coated with a thin film, and the lubricant composition contains a basic oil (C), PAG (D), and an acid oxygen-containing organic compound (E) with an acid number of more than 1 mgKOH/g.

Description

LOW-FRICTION SLIDING MECHANISM INCLUDING LUBRICANT
COMPOSITION
Field of the Invention
The present invention relates to a low-friction sliding mechanism including a lubricant composition containing polyalkylene glycol and an acid
oxygen-containing organic compound.
Background of the Invention
Lubricants used for machines are required to have higher wear resistance and fuel-saving property. More and more machines, particularly the machines used for an automobile component, which are required to have the fuel-saving property, have come to employ a DLC film for the sliding component. As an additive that provides the effect of reducing the friction, an oily agent such as ester, a fatty acid, and amine have been used, as reported in JP-A-2005-68171.
According to some reports ("Friction induced phase transformation of pulsed laser deposited diamond-like carbon" A. A. Voevodin, et . al . , Diamond and Related Materials 5(1996) 1264-1269; and "Effect of Thermal Annealing on Tribological and Corrosion Properties of DLC
Coatings" Linlin Wang, X. Nie, and Xin Hu, Journal of Materials Engineering and Performance Volume 22(10) October 2013 3093-3100), friction causes the DLC surface to be carbonized (increase in sp2) and therefore softened. In view of this, the higher fuel-saving property that leads to the higher effect of reducing the friction in the presence of the DLC film has been desired. If the coefficient of friction is low, the friction heat generation is reduced, thereby suppressing the reported carbonization (increase in sp2) due to the friction on the DLC surface and the resulting softening of the surface. This may enable the DLC to have higher wear resistance. Furthermore, the lower friction resistance leads to the smaller stress in the DLC or between the DLC portion and a member below the DLC portion, thereby suppressing the problem of the separation of the DLC film. This enables the DLC lubricant system to continue for a long time. Summary of the Invention
The present invention has been made in view of such circumstances, and an object thereof is to maintain the DLC lubricant system for a long time by further reducing the friction .
As a result of concerted studies for achieving the above object, the present inventors have discovered that an adsorbate derived from an ash-free friction modifier formed between the DLC film and the metal is changed into the material more effective in reducing the friction by adding a higher alcohol mainly containing polyalkylene glycol (PAG) , and this provides the synergistic effect of PAG and the ash-free friction modifier, particularly an acid oxygen-containing organic compound.
Detailed Description of the Invention
An aspect of the present invention is a low-friction sliding mechanism including a lubricant composition on a sliding plane between a DLC-coated sliding member (A) and a sliding member (B) . The DLC-coated sliding member (A) is formed by coating a base material with
diamond-like-carbon (DLC) containing 10 atom% or less of hydrogen. The sliding member (B) includes at least one kind of material selected from the group consisting of a metal material, a non-metal material, and a metal or non-metal coated material having a surface coated with a thin film. The lubricant composition contains a basic oil (C) , PAG (D) , and an acid oxygen-containing organic compound (E) with an acid number of more than 1 mgKOH/g.
Preferably, the diamond-like-carbon contain 0.5 atom% or less of hydrogen.
A further embodiment of the present invention is a low-friction sliding mechanism including a lubricant composition on a sliding plane between a DLC-coated sliding member (A) and a sliding member (B) . In this embodiment, the DLC-coated sliding member (A) is formed by coating a base material with a-C diamond-like-carbon without hydrogen. The sliding member (B) includes at least one kind of material selected from the group consisting of a metal material, a non-metal material, and a metal or non-metal coated material having a surface coated with a thin film. The lubricant composition contains a basic oil (C) , PAG (D) , and an acid oxygen-containing organic compound (E) with an acid number of more than 1 mgKOH/g.
Preferably in the low-friction sliding mechanism of the present invention, the metal material of the sliding member (B) is at least one kind of material selected from the group consisting of a material containing iron, a material containing aluminum alloy, and a material containing magnesium alloy . The coated material is formed by being coated with the thin film of at least one kind of material selected from the group consisting of DLC and ceramics .
Also preferably, the PAG (D) is at least one kind selected from the group consisting of polyethylene glycol, polypropylene glycol, and polybutylene glycol. The PAG (D) has a weight-average molecular weight of from 200 to 10, 000.
In an embodiment of the present invention, the PAG (D) is present in an amount in the range of from 0.1 to 20.0% based on the entire amount of the lubricant composition.
Preferably, the acid oxygen-containing organic compound (E) has a carbon number of 8 to 1,000.
Also preferably, the acid number of the acid oxygen-containing organic compound (E) is 1.2 mgKOH/g or more .
Preferably, in the low-friction sliding mechanism of the present invention, the lubricant composition contains the acid oxygen-containing organic compound (E) in an amount in the range of from 0.05 to 5.0% based on the entire lubricant composition. It is also preferred that the acid oxygen-containing organic compound (E) contains at least one kind selected from the group consisting of alcohols, esters, ethers, ketones, aldehydes, carbonates, and derivatives thereof.
The present invention also provides a lubricant system including the low-friction sliding mechanism as described herein.
According to any of the aspects of the present invention, the function of reducing the friction of DLC can be further increased by adding an acid oxygen-containing organic compound to a system with PAG added to a basic oil.

Claims

C L A I M S
1. A low-friction sliding mechanism comprising a lubricant composition on a sliding plane between a DLC-coated sliding member (A) and a sliding member (B) , wherein: the DLC-coated sliding member (A) is formed by coating a base material with diamond-like-carbon containing 10 atom% or less of hydrogen; the sliding member (B) includes at least one kind of material selected from the group consisting of a metal material, a non-metal material, and a metal or non-metal coated material having a surface coated with a thin film; and the lubricant composition contains a basic oil (C) , PAG (D) , and an acid oxygen-containing organic compound (E) with an acid number of more than 1 mgKOH/g.
2. The low-friction sliding mechanism according to claim 1, wherein the diamond-like-carbon contains 0.5 atom% or less of hydrogen.
3. A low-friction sliding mechanism comprising a lubricant composition on a sliding plane between a DLC-coated sliding member (A) and a sliding member (B) , wherein: the DLC-coated sliding member (A) is formed by coating a base material with a-C diamond-like-carbon without hydrogen; the sliding member (B) includes at least one kind of material selected from the group consisting of a metal material, a non-metal material, and a metal or non-metal coated material having a surface coated with a thin film; and the lubricant composition contains a basic oil (C) , PAG (D) , and an acid oxygen-containing organic compound (E) with an acid number of more than 1 mgKOH/g.
4. The low-friction sliding mechanism according to any one of claims 1 to 3, wherein: the metal material of the sliding member (B) is at least one kind of material selected from the group consisting of a material containing iron, a material containing aluminum alloy, and a material containing magnesium alloy; and the coated material is formed by being coated with the thin film of at least one kind of material selected from the group consisting of DLC and ceramics .
5. The low-friction sliding mechanism according to any one of claims 1 to 4, wherein: the PAG (D) is at least one kind selected from the group consisting of polyethylene glycol, polypropylene glycol, and polybutylene glycol, and the PAG (D) has a weight-average molecular weight of from 200 to 10,000.
6. The low-friction sliding mechanism according to any one of claims 1 to 5, wherein the PAG (D) is present in an amount in the range of from 0.1 to 20.0% based on the entire amount of the lubricant composition.
7. The low-friction sliding mechanism according to any one of claims 1 to 6, wherein the acid oxygen-containing organic compound (E) has a carbon number of from 8 to 1, 000.
8. The low-friction sliding mechanism according to any one of claims 1 to 7, wherein the acid number of the acid oxygen-containing organic compound (E) is 1.2 mgKOH/g or more .
9. The low-friction sliding mechanism according to any one of claims 1 to 7, wherein the lubricant composition contains the acid oxygen-containing organic compound (E) in an amount in the range of from 0.05 to 5.0% based on the entire amount of the lubricant composition, and the acid oxygen-containing organic compound (E) contains at least one kind selected from the group consisting of alcohols, esters, ethers, ketones, aldehydes, carbonates, and derivatives thereof.
10. A lubricant system comprising the low-friction sliding mechanism according to any one of claims 1 to 9.
EP16766019.0A 2015-09-17 2016-09-15 Low-friction sliding mechanism including lubricant composition Withdrawn EP3350294A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015184053A JP6581452B2 (en) 2015-09-17 2015-09-17 Low friction sliding mechanism with lubricating oil composition using polyalkylene glycol and acidic oxygenated organic compound
PCT/EP2016/071887 WO2017046276A1 (en) 2015-09-17 2016-09-15 Low-friction sliding mechanism including lubricant composition

Publications (1)

Publication Number Publication Date
EP3350294A1 true EP3350294A1 (en) 2018-07-25

Family

ID=56926222

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16766019.0A Withdrawn EP3350294A1 (en) 2015-09-17 2016-09-15 Low-friction sliding mechanism including lubricant composition

Country Status (7)

Country Link
US (1) US20180258362A1 (en)
EP (1) EP3350294A1 (en)
JP (1) JP6581452B2 (en)
CN (1) CN108026472A (en)
BR (1) BR112018005387A2 (en)
RU (1) RU2018113749A (en)
WO (1) WO2017046276A1 (en)

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005012467A1 (en) * 2003-08-01 2005-02-10 Nippon Oil Corporation Refrigerating machine oil compositions
EP1666573B1 (en) * 2003-08-06 2019-05-15 Nissan Motor Company Limited Low-friction sliding mechanism and method of friction reduction
CN100447224C (en) * 2003-08-06 2008-12-31 新日本石油株式会社 System with DLC contact surface, method for lubricating the system and lubricant for the system
JP4539205B2 (en) * 2003-08-21 2010-09-08 日産自動車株式会社 Refrigerant compressor
JP4973972B2 (en) * 2003-08-22 2012-07-11 日産自動車株式会社 Low friction sliding member for continuously variable transmission and continuously variable transmission oil composition used therefor
JP4973973B2 (en) * 2003-08-22 2012-07-11 日産自動車株式会社 Low friction sliding member for automatic transmission and automatic transmission oil composition used therefor
JP4976645B2 (en) * 2004-07-23 2012-07-18 出光興産株式会社 Lubricating oil composition for sliding part of internal combustion engine and sliding method
CN1730962A (en) * 2004-08-06 2006-02-08 日产自动车株式会社 Low friction sliding mechanism, low friction agent composition and method of reducing friction
JP2008308610A (en) * 2007-06-15 2008-12-25 Idemitsu Kosan Co Ltd Refrigerator oil composition
JP5731306B2 (en) * 2011-07-21 2015-06-10 昭和シェル石油株式会社 Two-phase lubricating oil composition
FR2990213B1 (en) * 2012-05-04 2015-04-24 Total Raffinage Marketing LUBRICATING COMPOSITION FOR ENGINE
JP6055320B2 (en) * 2013-01-23 2016-12-27 コスモ石油ルブリカンツ株式会社 Hydraulic fluid composition

Also Published As

Publication number Publication date
JP2017057302A (en) 2017-03-23
WO2017046276A1 (en) 2017-03-23
JP6581452B2 (en) 2019-09-25
RU2018113749A (en) 2019-10-18
CN108026472A (en) 2018-05-11
BR112018005387A2 (en) 2018-10-09
US20180258362A1 (en) 2018-09-13

Similar Documents

Publication Publication Date Title
JP4824407B2 (en) System having DLC contact surface, method of lubricating the system, and lubricating oil for the system
CN101943214B (en) Low-friction sliding mechanism and method for reducing friction of first sliding part and second sliding part
CN101760286B (en) Low friction sliding mechanism, low friction agent composition, and method of reducing friction
WO2005014763A1 (en) System having dlc contacting faces, method for lubricating the system and lubricating oil for the system
WO2014115457A1 (en) Sliding member and method for producing same
Sun et al. Friction and wear of Cr-doped DLC films under different lubrication conditions
WO2014115602A1 (en) Clock lubricating-oil composition and clock
CN100447224C (en) System with DLC contact surface, method for lubricating the system and lubricant for the system
Vahidi et al. Comparative study of dry high-temperature tribological performance of hydrogen-free and hydrogenated DLC films deposited by HiPIMS in DOMS mode
JP5298451B2 (en) Sliding structure
JP6883805B2 (en) Hard coating and its manufacturing method
EP3350294A1 (en) Low-friction sliding mechanism including lubricant composition
CN103627485B (en) Lubricant for hot rolling of cobalt and alloy plate strips of cobalt
JP4840635B2 (en) Low friction oil-impregnated sliding mechanism
Ng et al. Effects of antiwear additives in the base oil on the tribological performance of hydrogen-free DLC coating
JP2005097570A (en) Low friction sliding member and low friction sliding mechanism using the same
CN105062630A (en) Lubricant for drawn austenitic stainless steel wire material
Iyappan et al. Comparison of tribological properties of MoS2 and graphite-PTFE coatings and its impact on machining of aluminium by HSS end mills
JP2005290187A (en) Lubricant composition for plastic working
JP4973972B2 (en) Low friction sliding member for continuously variable transmission and continuously variable transmission oil composition used therefor
JP2009221448A (en) Metal working fluid composition
CN103710106A (en) Lubricant for drawing of beryllium and beryllium-alloy wires, rods and tubes
JP6883804B2 (en) Hard coating
JP2013113430A (en) Sliding mechanism and friction reducing method therefor
Madej et al. The tribological properties of titanium carbonitride TiCN coating lubricated with non-toxic cutting fluid

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20180214

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20181113