US20100261625A1 - Composition for sliding member and sliding member coated with the composition - Google Patents

Composition for sliding member and sliding member coated with the composition Download PDF

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Publication number
US20100261625A1
US20100261625A1 US12/678,667 US67866708A US2010261625A1 US 20100261625 A1 US20100261625 A1 US 20100261625A1 US 67866708 A US67866708 A US 67866708A US 2010261625 A1 US2010261625 A1 US 2010261625A1
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Prior art keywords
sliding member
composition
vol
lubricating film
sliding
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English (en)
Inventor
Mitsuaki Hakamata
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Taiho Kogyo Co Ltd
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Taiho Kogyo Co Ltd
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Assigned to TAIHO KOGYO CO., LTD. reassignment TAIHO KOGYO CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HAKAMATA, MITSUAKI
Publication of US20100261625A1 publication Critical patent/US20100261625A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/20—Sliding surface consisting mainly of plastics
    • F16C33/201—Composition of the plastic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
    • C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
    • C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
    • C08G73/14—Polyamide-imides
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/005—Reinforced macromolecular compounds with nanosized materials, e.g. nanoparticles, nanofibres, nanotubes, nanowires, nanorods or nanolayered materials
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D179/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen, with or without oxygen, or carbon only, not provided for in groups C09D161/00 - C09D177/00
    • C09D179/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
    • C09D179/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
    • 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
    • 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
    • C10M125/10—Metal oxides, hydroxides, carbonates or bicarbonates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/20—Sliding surface consisting mainly of plastics
    • F16C33/208—Methods of manufacture, e.g. shaping, applying coatings
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2379/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen, or carbon only, not provided for in groups C08J2361/00 - C08J2377/00
    • C08J2379/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
    • C08J2379/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
    • 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
    • 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
    • C10M2201/06—Metal compounds
    • C10M2201/062—Oxides; Hydroxides; Carbonates or bicarbonates
    • 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
    • C10M2201/06—Metal compounds
    • C10M2201/065—Sulfides; Selenides; Tellurides
    • 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
    • C10M2213/00—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions
    • C10M2213/06—Perfluoro polymers
    • C10M2213/062—Polytetrafluoroethylene [PTFE]
    • 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
    • C10M2217/00—Organic macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2217/02—Macromolecular compounds obtained from nitrogen containing monomers by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2217/028—Macromolecular compounds obtained from nitrogen containing monomers by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a nitrogen-containing hetero ring
    • C10M2217/0285—Macromolecular compounds obtained from nitrogen containing monomers by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a nitrogen-containing hetero ring 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
    • C10M2217/00—Organic macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2217/04—Macromolecular compounds from nitrogen-containing monomers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2217/044—Polyamides
    • C10M2217/0443—Polyamides 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
    • C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
    • C10N2020/01—Physico-chemical properties
    • C10N2020/055—Particles related characteristics
    • C10N2020/06—Particles of special shape or size
    • 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
    • C10N2050/00—Form in which the lubricant is applied to the material being lubricated
    • C10N2050/023—Multi-layer lubricant coatings
    • C10N2050/025—Multi-layer lubricant coatings in the form of films or sheets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
    • F16C2208/20—Thermoplastic resins
    • F16C2208/40—Imides, e.g. polyimide [PI], polyetherimide [PEI]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
    • F16C2208/20—Thermoplastic resins
    • F16C2208/40—Imides, e.g. polyimide [PI], polyetherimide [PEI]
    • F16C2208/42—Polyamideimide [PAI]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
    • F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
    • F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
    • F16C2240/48—Particle sizes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
    • F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
    • F16C2240/60—Thickness, e.g. thickness of coatings

Definitions

  • the present invention relates to a composition for a sliding member. More specifically, the invention relates to a composition for the sliding member, which is applied to a surface of the sliding member and provided a lubricating film having in good abrasion resistance. That is, when the lubricating film is formed on the surface of the sliding member, even if the formed lubricating film is pressed and slid, large cracks in the lubricating film is not formed and large peeling off of the lubricating film is restrained from occurring.
  • compositions for sliding members for lubricating sliding member of machinery such as fluid machinery, for example, swash plate compressor, are known. These compositions for sliding members are coated on the surface of each sliding members, such as a piston or a bearing, and function as lubricating films. Accordingly, these compositions for sliding members are required that the lubricating films have low friction coefficient and excellent abrasion resistance without being abraded by long-term use, and good conformability with a counterpart member.
  • compositions for sliding members compositions containing solid lubricant in base resin, or compositions containing hard fine particles having a particle size in the order of ⁇ m in base resin are known.
  • a composition for a sliding member includes 70 to 97 mass % of solid lubricant selected from molybdenum disulfide, tungsten disulfide, boron nitride, graphite and carbon fibers, and 3 to 30 mass % of the base resin.
  • the base resin includes resin selected from a polyimide-based resin, an epoxy resin and a phenol resin, and a film-forming assistant agent.
  • patent document 2 discloses a base resin of a composition for a sliding member selected from polyamideimide, polyimide-based and epoxy-based resin. Further, the base resin contains a solid lubricant including 10 to 40 vol % of molybdenum disulfide, 10 to 40 vol % of flake graphite or vein graphite, and 10 to 40 vol % of polytetrafluoroethylene. Furthermore, a sum total of the solid lubricant is from 30 to 60 vol %, and the remainder is substantially the base resin.
  • patent document 2 discloses a composition for a sliding member including the base resin containing hard fine particles having the particle size of 0.01 to 3 ⁇ m.
  • the fine particles are such as zinc sulfide, alumina, silica, silicon carbide, silicon nitride, or etc.
  • Patent Document 1 Japanese Patent Unexamined Publication No. JP-A-7-247493
  • Patent Document 2 Japanese Patent Unexamined Publication No. JP-A-2005-089514
  • an object of the invention is to provide a composition for a sliding member which provides a lubricating film in good abrasion resistance. That is, even if the formed lubricating film is pressed and slid, large cracks in the lubricating film are not formed and large peeling off of the lubricating film is restrained from occurring.
  • the present inventor has found that by bringing nano metal particles softer than a counterpart material in a base resin, a generation of cracks can be guided around the nano particles. Thereby, even if the formed lubricating film is pressed and slid, a generation of large cracks and a generation of large peeling off in the lubricating film are prevented. Thus, the invention has been accomplished.
  • the soft nano metal particles are at least one substance selected from single metal, oxide and sulfide of Cu, Ag, Bi, Al, Sn, Pb, In, Mg, Zn, Au and Sb except for Al oxide and sulfides of Bi, Al, Sn and In.
  • an average particle size of the soft nano metal particles is from 0.1 to 100 nm.
  • the composition for the sliding member of the invention When the composition for the sliding member of the invention is applied and coated on a surface of the sliding member to form the lubricating film, the invention provides the lubricating film having in good abrasion resistance.
  • the lubricating film formed of the composition for the sliding member of the invention it is considered that when the contained soft nano metal particles are exposed to the surface, the soft nano metal particles are crushed by sliding with the counterpart member. Furthermore, the soft nano metal particles are beaten out and transferred to the counterpart member so as to form a thin film. This film is presumably superior in a sliding property, and so the sliding property is much more improved.
  • FIG. 1 shows mechanism of peeling off and abrasion of a lubricating film formed of a conventional composition for a sliding member.
  • FIG. 2 shows mechanism of peeling off and abrasion of a lubricating film formed of a composition for a sliding member of the invention.
  • FIG. 3 shows the mechanism of transfer of soft nano metal particles from the lubricating film formed of the composition for the sliding member of the invention to the counterpart member.
  • FIG. 4 shows a rotational vibration tester used in examples.
  • FIG. 5 is a front view of the rotational vibration tester used in the examples with Rr face of a swash plate being the front.
  • a base resins for use in a composition for a sliding member of the invention various kinds of resins used as the base resins of the composition for the sliding member can be arbitrarily used, however, resins having excellent in heat resistance such as polyimide resins, e.g., polyamideimide and polyimide, epoxy resins and phenol resins can be preferably used. Resins having tensile strength of 150 MPa or more and elongation of 40% or more are especially preferable to use.
  • the composition for the sliding member of the invention contains soft nano metal particles.
  • soft metal means metals softer than the counterpart member of sliding.
  • the soft nano metal particles nano particles of single metal, oxide and sulfide of soft metals such as Cu, Ag, Bi, Al, Sn, Pb, In, Mg, Sb, Zn, and Au except for Al oxide and sulfides of Bi, Al, Sn, and In can be used.
  • the soft nano metal particles can be used by only one kind, or two or more can be used in combination.
  • the shapes of the soft nano metal particles to be used are not restricted and spherical, massive and flat shapes can be used, however, in the viewpoint of sliding property, in particular, attacking property of counterpart member, spherical particles are preferred.
  • the average particle size of the soft nano metal particles is preferably from 0.1 to 100 nm, and more preferably from 0.1 to 40 nm.
  • the average particle size of 0.1 to 100 nm is preferred in the view of peeling off resistance of the lubricating film and transfer of the nano metal particles.
  • soft nano metal particles CuO, Ag, ZnO, SnO 2 , Au, In 2 O 3 , Bi 2 O 3 , the above are manufactured by C. I. KASEI CO., LTD. under the names of “Nano Teck Powder”, are exemplified.
  • a following method what it called a PVS method, is exemplified. Initially, thermal energy is imparted on the raw material, so that gasified metal atom is generated. Subsequently, the gasified metal atom contacts with reaction gas such as oxygen or the like so as to obtain molecules and clusters of a metal oxide. Then, the metal oxide is instantly cooled and the above nano particles are obtained.
  • the content of soft nano metal particles in the composition for the sliding member of the invention is more than 0 vol % and 5 vol % or less, and preferably 1 vol % or less. When the content exceeds 5 vol %, the nano metal particles are agglomerated, and there is a risk that a sliding property peculiar to nano metal particles may lose.
  • solid lubricants similar to those used in conventional compositions for the sliding member, e.g., polytetrafluoroethylene, molybdenum disulfide, tungsten disulfide, boron nitride, graphite, carbon fibers, etc., can be contained in the base resin.
  • Solid lubricants may be used by only one kind, or two or more may be used in combination.
  • the average particle size of solid lubricants is generally preferably from 0.5 to 30 ⁇ m. By the use of solid lubricants, the sliding property is improved.
  • the content of the solid lubricants is preferable from 20 to 80 vol %, more preferable from 20 to 70 vol %, and furthermore preferable from 20 to 50 vol %.
  • the content is more than 80 vol %, it is difficult to form the lubricating film. While when the content is less than 20 vol %, the sliding property lowers a little.
  • the composition for the sliding member of the invention can be prepared according to ordinary methods.
  • the composition can be prepared by mixing a certain amount of each composition components such as base resin, soft nano metal particles, if necessary, a solid lubricant and so on, and an organic solvent by using a mixer, e.g., a Henschel mixer, a super mixer, a ball mill, a tumbler mixer, a bead mill, a kneader, etc.
  • a mixer e.g., a Henschel mixer, a super mixer, a ball mill, a tumbler mixer, a bead mill, a kneader, etc.
  • solvents which can dissolve the base resin are arbitrarily exemplified NMP, xylene, alcohol and the like.
  • the kinds of solvents depend upon the kinds of base resins.
  • the amount of the organic solvent can be arbitrarily set according to the desired viscosity of the obtained composition for the sliding member.
  • the lubricating film made of the composition for the sliding member of the invention on the surface of the sliding member can also be formed according to ordinary methods.
  • the composition for the sliding member is coated on a surface of the sliding member by a spraying method, a roll coat method, a dipping method, screen printing, pad printing, or the like, and then the coated layer is hardened by heating so as to form the lubricating film.
  • the heating and hardening condition of the coated layer may be ordinary heating condition suited to materials to be used, although it depends upon the kind of the base resin.
  • the thickness of the lubricating film formed on the surface of the sliding member can be optionally set as necessary, however, generally from 5 to 50 ⁇ m is preferred.
  • composition for the sliding member of the invention can be preferably widely applied to sliding parts of machinery such as fluid machinery, and especially preferably applied to sliding parts of sliding bearing such as the swash plate of the swash plate type compressor, half bearing, bush and washer or the like.
  • PTFE Polytetrafluoroethylene
  • Copper oxide (CuO) “Nano Teck Powder”, manufactured by C. I. KASEI CO., LTD. (average particle size 30 nm, spherical shape)
  • Zinc oxide (ZnO) “Nano Teck Powder”, manufactured by C. I. KASEI CO., LTD. (average particle size 30 nm, polyhedral shape)
  • Tester Three pins/a disc type seizure pressure tester Rotation number: 4,000 r/min Lubricating condition: Mist lubrication Counterpart shaft: SUJ2 (a shoe type) Load condition: Gradual increase from preload of from 1 MPa to 3 MPa/15 minutes
  • Example Comparative Comparative Comparative Comparative 1-1 1-2 Example 1-1
  • Example 1-2 Example 1-3
  • Example 1-4 Particles Kind CuO ZnO None Al 2 O 3 Al 2 O 3 Al 2 O 3 Average 30 nm 30 nm — 30 nm 1 ⁇ m 1 ⁇ m particle size
  • PTFE Polytetrafluoroethylene
  • Rotation vibration test and rotation load test of each of the formed lubricating films were carried out as follows. The results of the rotation vibration test and rotation load test are shown in Table 2 below.
  • Rotation vibration test was carried out with rotation vibration tester 1 shown in FIG. 4 on the following condition.
  • piston 3 reciprocates from side to side by rotating the swash plate 6 installed at the motor shaft with an inclination by 5 degrees, as the side of motor 2 is front face (Fr face) and the side of cylinder 5 is rear face (Rr face).
  • Test condition Rotation speed of the rotation vibration tester gradually increases from 1,000 r/min to 7,000 r/min at 1,000 r/min, and then the rotation speed of 7,000 r/min was maintained. The load was 215 g. The test time was determined for 36 minutes including the time of gradual increase of the rotation speed.
  • Lubricating condition Paraffin oil was injected in an oil mist state by 1.1 g/min on the Fr face of the swash plate and 0.6 g/min on the Rr face.
  • Test condition The rotation speed was fixed at 9,500 r/min. The load was gradually increased from 3.8 MPa to 12.6 MPa at 1.6 MPa/3 minutes, and then the load of 12.6 MPa was maintained. The test time was determined for 78 minutes including the time of gradual increase of the load.
  • Lubricating condition A mixture of a coolant and refrigerating machine oil was supplied in a mist state.
  • Rotation vibration The one that ran at 7,000 r/min for 36 minutes including the time of gradual increase of the rotation number was graded as one having sufficient properties.
  • Rotation load The one that ran at 9,500 r/min, 12.6 MPa for 78 minutes including the time of gradual increase of the load was graded as one having sufficient properties.
  • the invention provides the lubricating film having in good abrasion resistance. That is, because generation of cracks is guided around the nano particles due to the contained soft nano metal particles, even if the formed lubricating film is pressed and slid, generation of large cracks and a generation of large peeling off in the lubricating film are prevented.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Nanotechnology (AREA)
  • General Chemical & Material Sciences (AREA)
  • Polymers & Plastics (AREA)
  • Medicinal Chemistry (AREA)
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  • Oil, Petroleum & Natural Gas (AREA)
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  • Composite Materials (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Lubricants (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Paints Or Removers (AREA)
US12/678,667 2007-09-27 2008-09-26 Composition for sliding member and sliding member coated with the composition Abandoned US20100261625A1 (en)

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JP2007-252610 2007-09-27
JP2007252610 2007-09-27
PCT/JP2008/067551 WO2009041653A1 (ja) 2007-09-27 2008-09-26 摺動部材用組成物及び該組成物を被着した摺動部材

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EP (1) EP2194101B1 (de)
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KR (1) KR101290416B1 (de)
CN (1) CN101809092B (de)
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US20110315111A1 (en) * 2010-06-28 2011-12-29 Hitachi Automotive Systems, Ltd. Piston of Internal Combustion Engine
US20120088093A1 (en) * 2009-03-19 2012-04-12 Marcus Kennedy Method for coating a sliding element and sliding element, in particular a piston ring
US8476206B1 (en) 2012-07-02 2013-07-02 Ajay P. Malshe Nanoparticle macro-compositions
US8486870B1 (en) * 2012-07-02 2013-07-16 Ajay P. Malshe Textured surfaces to enhance nano-lubrication
US8492319B2 (en) 2006-01-12 2013-07-23 Ajay P. Malshe Nanoparticle compositions and methods for making and using the same
CN103589477A (zh) * 2012-08-13 2014-02-19 佛山市顺德宇红纳米科技有限公司 一种稳定分散的复合金属纳米润滑油制备方法
US20140303050A1 (en) * 2011-09-28 2014-10-09 Taiho Kogyo Co., Ltd. Sliding member and sliding material composition
US9074628B2 (en) 2011-12-22 2015-07-07 Taiho Kogyo Co., Ltd. Sliding component
US9181897B2 (en) 2011-04-06 2015-11-10 Honda Motor Co., Ltd. Sliding member and method for producing sliding member
US9316298B2 (en) 2012-01-20 2016-04-19 Taiho Kogyo Co., Ltd. Sliding member
US20160130520A1 (en) * 2014-11-10 2016-05-12 Korea Institute Of Science And Technology Coating material of metal-phosphate-based ceramic complex having heat and abrasion resistance and low friction characteristics and coating method thereof
US10100266B2 (en) 2006-01-12 2018-10-16 The Board Of Trustees Of The University Of Arkansas Dielectric nanolubricant compositions
US10337558B2 (en) * 2016-08-19 2019-07-02 Mahle International Gmbh Sliding component and method
CN114250099A (zh) * 2020-09-24 2022-03-29 马勒国际有限公司 具有固体润滑剂的轴承材料
US11352581B2 (en) 2016-11-17 2022-06-07 Taiho Kogyo Co., Ltd. Resin composition and sliding member
US11421173B2 (en) 2016-11-17 2022-08-23 Taiho Kogyo Co., Ltd. Resin composition and sliding member
US20230087184A1 (en) * 2020-05-28 2023-03-23 Hitachi Industrial Equipment Systems Co., Ltd. Compressor

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JP5243467B2 (ja) * 2010-02-05 2013-07-24 大同メタル工業株式会社 摺動部材
KR101108784B1 (ko) 2010-06-21 2012-02-24 삼성전기주식회사 도전성 전극 패턴 및 이를 구비하는 태양전지
EP2757277B1 (de) * 2011-09-13 2018-06-06 Taiho Kogyo Co., Ltd Gleitelement und gleitmaterialzusammensetzung
JP7092636B2 (ja) * 2018-10-22 2022-06-28 大同メタル工業株式会社 摺動部材及びこれを用いる軸受装置
JP7344093B2 (ja) * 2019-11-07 2023-09-13 大同メタル工業株式会社 摺動部材
JP7149252B2 (ja) * 2019-11-27 2022-10-06 大豊工業株式会社 摺動部材用樹脂材料および摺動部材

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US9718967B2 (en) 2006-01-12 2017-08-01 The Board Of Trustees Of The University Of Arkansas Nano-tribology compositions and related methods including nano-sheets
US10100266B2 (en) 2006-01-12 2018-10-16 The Board Of Trustees Of The University Of Arkansas Dielectric nanolubricant compositions
US9902918B2 (en) 2006-01-12 2018-02-27 The Board Of Trustees Of The University Of Arkansas Nano-tribology compositions and related methods including hard particles
US8492319B2 (en) 2006-01-12 2013-07-23 Ajay P. Malshe Nanoparticle compositions and methods for making and using the same
US9868920B2 (en) 2006-01-12 2018-01-16 The Board Of Trustees Of The University Of Arkansas Nanoparticle compositions and greaseless coatings for equipment
US9499766B2 (en) 2006-01-12 2016-11-22 Board Of Trustees Of The University Of Arkansas Nanoparticle compositions and methods for making and using the same
US9650589B2 (en) 2006-01-12 2017-05-16 The Board Of Trustees Of The University Of Arkansas Nanoparticle compositions and additive packages
US20120088093A1 (en) * 2009-03-19 2012-04-12 Marcus Kennedy Method for coating a sliding element and sliding element, in particular a piston ring
US8667945B2 (en) * 2010-06-28 2014-03-11 Hitachi Automotive Systems, Ltd. Piston of internal combustion engine
US20110315111A1 (en) * 2010-06-28 2011-12-29 Hitachi Automotive Systems, Ltd. Piston of Internal Combustion Engine
US9181897B2 (en) 2011-04-06 2015-11-10 Honda Motor Co., Ltd. Sliding member and method for producing sliding member
US9109185B2 (en) * 2011-09-28 2015-08-18 Taiho Kogyo Co., Ltd. Sliding member and sliding material composition
US20140303050A1 (en) * 2011-09-28 2014-10-09 Taiho Kogyo Co., Ltd. Sliding member and sliding material composition
US9074628B2 (en) 2011-12-22 2015-07-07 Taiho Kogyo Co., Ltd. Sliding component
US9316298B2 (en) 2012-01-20 2016-04-19 Taiho Kogyo Co., Ltd. Sliding member
US9359575B2 (en) 2012-07-02 2016-06-07 Nanomech, Inc. Nanoparticle macro-compositions
US9592532B2 (en) 2012-07-02 2017-03-14 Nanomech, Inc. Textured surfaces to enhance nano-lubrication
US8921286B2 (en) * 2012-07-02 2014-12-30 Nanomech, Inc. Textured surfaces to enhance nano-lubrication
US8486870B1 (en) * 2012-07-02 2013-07-16 Ajay P. Malshe Textured surfaces to enhance nano-lubrication
US10066187B2 (en) 2012-07-02 2018-09-04 Nanomech, Inc. Nanoparticle macro-compositions
US8476206B1 (en) 2012-07-02 2013-07-02 Ajay P. Malshe Nanoparticle macro-compositions
CN103589477A (zh) * 2012-08-13 2014-02-19 佛山市顺德宇红纳米科技有限公司 一种稳定分散的复合金属纳米润滑油制备方法
US20160130520A1 (en) * 2014-11-10 2016-05-12 Korea Institute Of Science And Technology Coating material of metal-phosphate-based ceramic complex having heat and abrasion resistance and low friction characteristics and coating method thereof
US10337558B2 (en) * 2016-08-19 2019-07-02 Mahle International Gmbh Sliding component and method
US11352581B2 (en) 2016-11-17 2022-06-07 Taiho Kogyo Co., Ltd. Resin composition and sliding member
US11421173B2 (en) 2016-11-17 2022-08-23 Taiho Kogyo Co., Ltd. Resin composition and sliding member
US20230087184A1 (en) * 2020-05-28 2023-03-23 Hitachi Industrial Equipment Systems Co., Ltd. Compressor
CN114250099A (zh) * 2020-09-24 2022-03-29 马勒国际有限公司 具有固体润滑剂的轴承材料

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EP2194101B1 (de) 2014-08-13
JPWO2009041653A1 (ja) 2011-01-27
KR20100058609A (ko) 2010-06-03
CN101809092A (zh) 2010-08-18
WO2009041653A1 (ja) 2009-04-02
CN101809092B (zh) 2012-10-31
EP2194101A1 (de) 2010-06-09
EP2194101A4 (de) 2012-11-21
KR101290416B1 (ko) 2013-07-26

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