WO2022185601A1 - 摺動部材用熱硬化性樹脂組成物、当該組成物からなる硬化物およびその用途 - Google Patents
摺動部材用熱硬化性樹脂組成物、当該組成物からなる硬化物およびその用途 Download PDFInfo
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- WO2022185601A1 WO2022185601A1 PCT/JP2021/038748 JP2021038748W WO2022185601A1 WO 2022185601 A1 WO2022185601 A1 WO 2022185601A1 JP 2021038748 W JP2021038748 W JP 2021038748W WO 2022185601 A1 WO2022185601 A1 WO 2022185601A1
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- resin composition
- thermosetting resin
- sliding
- cured product
- sliding members
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- ILRSCQWREDREME-UHFFFAOYSA-N dodecanamide Chemical compound CCCCCCCCCCCC(N)=O ILRSCQWREDREME-UHFFFAOYSA-N 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- UAUDZVJPLUQNMU-KTKRTIGZSA-N erucamide Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-KTKRTIGZSA-N 0.000 description 1
- DPUOLQHDNGRHBS-KTKRTIGZSA-N erucic acid Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(O)=O DPUOLQHDNGRHBS-KTKRTIGZSA-N 0.000 description 1
- 150000002148 esters Chemical group 0.000 description 1
- NCXTWAVJIHJVRV-UHFFFAOYSA-N ethane-1,2-diol;16-methylheptadecanoic acid;titanium Chemical compound [Ti].OCCO.CC(C)CCCCCCCCCCCCCCC(O)=O.CC(C)CCCCCCCCCCCCCCC(O)=O NCXTWAVJIHJVRV-UHFFFAOYSA-N 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- WYZXIJYWXFEAFG-UHFFFAOYSA-N ethyl-(3-isocyanatopropyl)-dimethoxysilane Chemical compound CC[Si](OC)(OC)CCCN=C=O WYZXIJYWXFEAFG-UHFFFAOYSA-N 0.000 description 1
- 229910021485 fumed silica Inorganic materials 0.000 description 1
- 239000005350 fused silica glass Substances 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- FEEPBTVZSYQUDP-UHFFFAOYSA-N heptatriacontanediamide Chemical compound NC(=O)CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC(N)=O FEEPBTVZSYQUDP-UHFFFAOYSA-N 0.000 description 1
- HSEMFIZWXHQJAE-UHFFFAOYSA-N hexadecanamide Chemical compound CCCCCCCCCCCCCCCC(N)=O HSEMFIZWXHQJAE-UHFFFAOYSA-N 0.000 description 1
- 239000004312 hexamethylene tetramine Substances 0.000 description 1
- 235000010299 hexamethylene tetramine Nutrition 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 125000001261 isocyanato group Chemical group *N=C=O 0.000 description 1
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 229960004488 linolenic acid Drugs 0.000 description 1
- KQQKGWQCNNTQJW-UHFFFAOYSA-N linolenic acid Natural products CC=CCCC=CCC=CCCCCCCCC(O)=O KQQKGWQCNNTQJW-UHFFFAOYSA-N 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- HGPXWXLYXNVULB-UHFFFAOYSA-M lithium stearate Chemical compound [Li+].CCCCCCCCCCCCCCCCCC([O-])=O HGPXWXLYXNVULB-UHFFFAOYSA-M 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 235000019359 magnesium stearate Nutrition 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 239000004200 microcrystalline wax Substances 0.000 description 1
- 235000019808 microcrystalline wax Nutrition 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 239000012170 montan wax Substances 0.000 description 1
- 229940043348 myristyl alcohol Drugs 0.000 description 1
- PHQOGHDTIVQXHL-UHFFFAOYSA-N n'-(3-trimethoxysilylpropyl)ethane-1,2-diamine Chemical compound CO[Si](OC)(OC)CCCNCCN PHQOGHDTIVQXHL-UHFFFAOYSA-N 0.000 description 1
- WQEPLUUGTLDZJY-UHFFFAOYSA-N n-Pentadecanoic acid Natural products CCCCCCCCCCCCCCC(O)=O WQEPLUUGTLDZJY-UHFFFAOYSA-N 0.000 description 1
- GOQYKNQRPGWPLP-UHFFFAOYSA-N n-heptadecyl alcohol Natural products CCCCCCCCCCCCCCCCCO GOQYKNQRPGWPLP-UHFFFAOYSA-N 0.000 description 1
- LYRFLYHAGKPMFH-UHFFFAOYSA-N octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(N)=O LYRFLYHAGKPMFH-UHFFFAOYSA-N 0.000 description 1
- NKBWPOSQERPBFI-UHFFFAOYSA-N octadecyl octadecanoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCCCCCCCCCCCCCCCC NKBWPOSQERPBFI-UHFFFAOYSA-N 0.000 description 1
- WGOROJDSDNILMB-UHFFFAOYSA-N octatriacontanediamide Chemical compound NC(=O)CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC(N)=O WGOROJDSDNILMB-UHFFFAOYSA-N 0.000 description 1
- FATBGEAMYMYZAF-KTKRTIGZSA-N oleamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(N)=O FATBGEAMYMYZAF-KTKRTIGZSA-N 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 1
- 235000021313 oleic acid Nutrition 0.000 description 1
- QNGNSVIICDLXHT-UHFFFAOYSA-N para-ethylbenzaldehyde Natural products CCC1=CC=C(C=O)C=C1 QNGNSVIICDLXHT-UHFFFAOYSA-N 0.000 description 1
- 229920002866 paraformaldehyde Polymers 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- XPGAWFIWCWKDDL-UHFFFAOYSA-N propan-1-olate;zirconium(4+) Chemical compound [Zr+4].CCC[O-].CCC[O-].CCC[O-].CCC[O-] XPGAWFIWCWKDDL-UHFFFAOYSA-N 0.000 description 1
- BCWYYHBWCZYDNB-UHFFFAOYSA-N propan-2-ol;zirconium Chemical compound [Zr].CC(C)O.CC(C)O.CC(C)O.CC(C)O BCWYYHBWCZYDNB-UHFFFAOYSA-N 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000012783 reinforcing fiber Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 235000003441 saturated fatty acids Nutrition 0.000 description 1
- 150000004671 saturated fatty acids Chemical class 0.000 description 1
- 238000000790 scattering method Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000600 sorbitol Substances 0.000 description 1
- 229940012831 stearyl alcohol Drugs 0.000 description 1
- TUNFSRHWOTWDNC-HKGQFRNVSA-N tetradecanoic acid Chemical compound CCCCCCCCCCCCC[14C](O)=O TUNFSRHWOTWDNC-HKGQFRNVSA-N 0.000 description 1
- 230000000930 thermomechanical effect Effects 0.000 description 1
- 125000003396 thiol group Chemical group [H]S* 0.000 description 1
- LKOVPWSSZFDYPG-WUKNDPDISA-N trans-octadec-2-enoic acid Chemical compound CCCCCCCCCCCCCCC\C=C\C(O)=O LKOVPWSSZFDYPG-WUKNDPDISA-N 0.000 description 1
- DDBUVUBWJVIGFH-UHFFFAOYSA-N trichloro(3-isocyanatopropyl)silane Chemical compound Cl[Si](Cl)(Cl)CCCN=C=O DDBUVUBWJVIGFH-UHFFFAOYSA-N 0.000 description 1
- FRGPKMWIYVTFIQ-UHFFFAOYSA-N triethoxy(3-isocyanatopropyl)silane Chemical compound CCO[Si](OCC)(OCC)CCCN=C=O FRGPKMWIYVTFIQ-UHFFFAOYSA-N 0.000 description 1
- JXUKBNICSRJFAP-UHFFFAOYSA-N triethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CCO[Si](OCC)(OCC)CCCOCC1CO1 JXUKBNICSRJFAP-UHFFFAOYSA-N 0.000 description 1
- QQQSFSZALRVCSZ-UHFFFAOYSA-N triethoxysilane Chemical compound CCO[SiH](OCC)OCC QQQSFSZALRVCSZ-UHFFFAOYSA-N 0.000 description 1
- DQZNLOXENNXVAD-UHFFFAOYSA-N trimethoxy-[2-(7-oxabicyclo[4.1.0]heptan-4-yl)ethyl]silane Chemical compound C1C(CC[Si](OC)(OC)OC)CCC2OC21 DQZNLOXENNXVAD-UHFFFAOYSA-N 0.000 description 1
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 description 1
- 235000021122 unsaturated fatty acids Nutrition 0.000 description 1
- 150000004670 unsaturated fatty acids Chemical class 0.000 description 1
- 125000002256 xylenyl group Chemical class C1(C(C=CC=C1)C)(C)* 0.000 description 1
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
- C08K3/013—Fillers, pigments or reinforcing additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
- C08L61/04—Condensation polymers of aldehydes or ketones with phenols only
- C08L61/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C25/00—Adaptations of pumps for special use of pumps for elastic fluids
- F04C25/02—Adaptations of pumps for special use of pumps for elastic fluids for producing high vacuum
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
Definitions
- the present invention relates to a thermosetting resin composition for sliding members, a cured product made from the composition, and uses thereof.
- Molding materials obtained from compositions containing phenolic resins have an excellent balance of heat resistance, dimensional accuracy, wear resistance, mechanical strength, etc., and are widely used in various fields.
- Patent Documents 1 to 3 disclose sliding members containing phenolic resin, graphite and the like.
- Patent Document 4 discloses a sliding member molding material containing phenolic resin, inorganic reinforcing fiber, and metal hydrate. Examples of phenolic resins include novolak-type phenolic resins and resol-type phenolic resins.
- Patent Document 5 discloses a phenolic resin molding material containing a phenolic resin and an inorganic filler such as glass beads, glass powder, or carbon fiber.
- Patent Document 6 discloses a sliding material composition containing a phenolic resin, a carbon material, and a metal alkoxide compound or a metal chelate compound.
- a phenolic resin a phenolic resin
- a carbon material a carbon material
- a metal alkoxide compound or a metal chelate compound a metal alkoxide compound or a metal chelate compound.
- novolac type phenol resins and resol type phenol resins are exemplified as phenol resins.
- the present inventors have found that by using a combination of graphite and a resol-type phenolic resin, the graphite can be contained in a predetermined amount, and the above problems can be solved, and the present invention has been completed. That is, the present invention can be shown below.
- thermosetting resin composition for sliding members including graphite and a resol-type phenolic resin,
- a thermosetting resin composition for sliding members is provided, containing the graphite in an amount of 55% by mass or more and 82% by mass or less.
- thermosetting resin composition for a sliding member A cured product obtained by curing the thermosetting resin composition for a sliding member is provided.
- a sliding member made of the cured product is provided.
- a vacuum pump is provided that includes the sliding member.
- a method for manufacturing a sliding member which includes the step of injection molding the thermosetting resin composition for a sliding member.
- thermosetting resin for a sliding member which is excellent in sliding properties and mechanical properties and which can obtain a cured product having a low dimensional change rate at high temperatures and excellent heat resistance, and which is excellent in moldability.
- a composition can be provided.
- thermosetting resin composition for sliding members of the present invention these effects are well balanced and excellent.
- thermosetting resin composition for sliding members of the present invention will be described based on embodiments.
- ⁇ represents “more than” to “less than” unless otherwise specified.
- thermosetting resin composition for sliding members of this embodiment contains graphite and a resol-type phenolic resin.
- Graphite is not particularly limited, and includes earthy graphite, flake graphite, and the like, and any of them can be used.
- thermosetting resin composition for sliding members (100% by mass) contains 55% by mass or more and 82% by mass or less of graphite, preferably 57% by mass or more and 80% by mass or less, more preferably 60% by mass. It can be contained in an amount of 75 mass % or less.
- thermosetting resin composition for a sliding member of the present embodiment which contains graphite in the above amount, it has excellent moldability, excellent sliding properties and mechanical properties, low dimensional change rate when heated, and high heat resistance. An excellent cured product can be obtained.
- the average particle size of graphite is preferably 1-40 ⁇ m, more preferably 3-30 ⁇ m. Those having an average particle size of less than the above lower limit can also be used, but they are not suitable due to a decrease in fluidity. On the other hand, if the above upper limit is exceeded, the sliding properties will deteriorate. Therefore, if the average particle size is within the above range, the fluidity and sliding properties are well balanced and excellent. In addition, if graphite with high thermal conductivity is used, the heat generated during sliding can be easily discharged, and it can be expected that the influence of heat can be suppressed.
- the average particle size means the particle size (D 50 ) at 50% volume integration in the graphite particle size distribution determined by the laser diffraction scattering method.
- Resol type phenolic resin Resol-type phenolic resins are prepared by combining phenols and aldehydes as raw materials in the presence of a basic catalyst, usually with a molar ratio of aldehydes to phenols (aldehydes/phenols) of 1.3 to 1.7. It can be obtained by reacting.
- the resol-type phenolic resin may be a commercial product.
- the raw material phenols are not particularly limited. Examples include phenol, o-cresol, m-cresol, p-cresol, xylenol, alkylphenols, catechol, and resorcinol. Only one type of phenols may be used as a raw material, or two or more types may be used in combination.
- Aldehyde as a raw material is not particularly limited. Examples thereof include aldehyde compounds such as formaldehyde, paraformaldehyde, and benzaldehyde, substances that generate these aldehyde compounds, and solutions of these aldehyde compounds. Only one kind of aldehyde may be used as a raw material, or two or more kinds may be used in combination.
- the number average molecular weight of the resol-type phenolic resin can be 400 or more and 2000 or less, preferably 450 or more and 1800 or less, more preferably 500 or more and 1500 or less.
- the number average molecular weight can be calculated by gel permeation chromatography (GPC) based on a calibration curve prepared using polystyrene standard substances.
- the resol type phenol resin is preferably 10% by mass or more and 50% by mass or less, more preferably 15% by mass or more in the thermosetting resin composition (100% by mass) for sliding members. It can be contained in an amount of 45 mass % or less, particularly preferably 20 mass % or more and 40 mass % or less.
- thermosetting resin composition for sliding members of the present embodiment can further contain a fiber filler within a range that does not affect the effects of the present invention, preferably 15% by mass or less, more preferably 10% by mass. Below, it can be contained in an amount of 8% by mass or less, particularly preferably.
- Fiber fillers include glass fiber, carbon fiber and rock wool.
- the glass fiber is not particularly limited, for example, it is preferable to use one having a number average fiber diameter of 10 to 15 ⁇ m and a number average fiber length of 1 to 3 mm. More preferably, the average fiber length is 2 to 3 mm.
- the thermosetting resin composition for sliding members of the present embodiment can further contain wax.
- wax known waxes can be used as long as the effect of the present invention is exhibited, and natural waxes such as paraffin wax, montan wax and carnauba wax, hydrocarbon waxes, higher fatty acids, and higher fatty acids are derived. and waxes obtained by One type of wax may be used alone, or two or more types may be used in combination.
- hydrocarbon waxes examples include paraffin waxes with 24 or more carbon atoms, olefin waxes with 26 or more carbon atoms, alkylbenzenes with 28 or more carbon atoms, and microcrystalline waxes.
- Higher fatty acids include higher saturated fatty acids having 12 or more carbon atoms such as lauric acid, myristic acid, palmitic acid, stearic acid, arachidic acid, behenic acid, cerotic acid and montanic acid, oleic acid, linoleic acid, linolenic acid, and elaidin.
- unsaturated fatty acids having 18 or more carbon atoms such as acids, octadecenoic acid, arachidonic acid, cadoleic acid, erucic acid, and parinaric acid;
- Waxes obtained by deriving higher fatty acids include higher fatty acid esters, higher fatty acid amides, and higher fatty acid salts (metallic soaps).
- a higher fatty acid ester is an ester of the higher fatty acid and a monohydric or polyhydric alcohol.
- Monohydric alcohols include capryl alcohol, lauryl alcohol, myristyl alcohol, palmityl alcohol, stearyl alcohol and behenyl alcohol.
- Polyhydric alcohols include ethylene glycol, propylene glycol, butanediol, glycerin, pentaerythritol and sorbitol. are mentioned.
- higher fatty acid esters examples include stearyl stearate, pentaerythritol tetrastearate, stearic acid monoglyceride, behenic acid monoglyceride and montanic acid wax.
- Higher fatty acid amides include saturated higher fatty acid amides such as lauric acid amide, palmitic acid amide, stearic acid amide and behenic acid amide, and unsaturated higher fatty acid amides such as erucic acid amide, oleic acid amide, brassic acid amide and elaidic acid amide. and higher fatty acid bisamides such as methylenebisstearic acid amide, ethylenebisstearic acid amide and ethylenebisoleic acid amide (including saturated or unsaturated higher fatty acid alkylamides such as higher fatty acid methylamides and higher fatty acid ethylamides).
- saturated higher fatty acid amides such as lauric acid amide, palmitic acid amide, stearic acid amide and behenic acid amide
- unsaturated higher fatty acid amides such as erucic acid amide, oleic acid amide, brassic acid amide and elaidic acid amide
- Higher fatty acid salts are salts of the higher fatty acids with alkali metals such as lithium, sodium and potassium or with alkaline earth metals such as magnesium, calcium and barium.
- alkali metals such as lithium, sodium and potassium
- alkaline earth metals such as magnesium, calcium and barium.
- higher fatty acid salts include lithium stearate, calcium stearate, zinc stearate, magnesium stearate and the like.
- the content of the wax is not particularly limited, but is preferably 0.2% by mass or more and 10% by mass or less, preferably 0.5% by mass, based on the thermosetting resin composition for sliding members (100% by mass). It is more than 5 mass % or less. If it is in the above range, it is excellent in sliding properties and is also excellent in fluidity.
- thermosetting resin composition for sliding members of the present embodiment may further contain silica particles.
- silica particles it is possible to further reduce the linear expansion coefficient of the cured product below the glass transition temperature, and it is more suitable for members such as rotors and vanes of vacuum pumps used at high rotation speed and high temperature. be able to.
- the silica particles are not particularly limited, but for example, fumed silica, calcined silica, precipitated silica, fused silica, etc. are used. These may be used alone or in combination of two or more.
- the linear expansion coefficient of silica particles can be preferably 1 ppm/K or less, more preferably 0.8 ppm/K or less. This makes it possible to further reduce the coefficient of linear expansion below the glass transition temperature of the cured product.
- thermosetting resin composition for sliding members of the present embodiment contains silica particles of preferably 3% by mass or more and 30% by mass or less, more preferably 3% by mass or more and 20% by mass or less, still more preferably 4% by mass. % or more and 15 mass % or less.
- thermosetting resin composition for sliding members of the present embodiment may further contain a coupling agent.
- a coupling agent By including a coupling agent, the affinity between graphite and resin is improved, and as a result, the mechanical strength of the obtained cured product (sliding member) can be further improved.
- coupling agent known compounds can be used as long as the effects of the present invention are achieved. Examples include silane coupling agents, titanium coupling agents, aluminum coupling agents, zirconium coupling agents, and zircoaluminate coupling agents. agents and the like. Coupling agents may be used alone or in combination of two or more.
- silane coupling agents include epoxy group-containing alkoxysilanes such as ⁇ -glycidoxypropyltrimethoxysilane, ⁇ -glycidoxypropyltriethoxysilane, ⁇ -(3,4-epoxycyclohexyl)ethyltrimethoxysilane.
- Titanium coupling agents include isopropyltriisostearoyl titanate, isopropyltridodecylbenzenesulfonyltitanate, isopropyltris(dioctylpyrophosphate)titanate, tetraisopropylbis(dioctylphosphite)titanate, tetraoctylbis(ditridecylphosphite)titanate, Tetra(2,2-diallyloxymethyl-1-butyl)bis(di-tridecyl)phosphite titanate, bis(dioctylpyrophosphate)oxyacetate titanate, bis(dioctylpyrophosphate)ethylene titanate, isopropyltrioctanoyltitanate, isopropyl dimethacrylisostearoyl titanate, isopropyl(dioctylphosphate
- aluminum coupling agents examples include acetoalkoxyaluminum diisopropionate.
- Zirconium coupling agents include tetrapropyl zirconate, tetrabutyl zirconate, tetra(triethanolamine) zirconate, tetraisopropyl zirconate, zirconium acetylacetonate, acetylacetone zirconium butyrate, and zirconium stearate butyrate.
- the content of the coupling agent is preferably 0.01% by mass or more and 4.0% by mass or less, more preferably 0.1% by mass or more, in the thermosetting resin composition (100% by mass) for sliding members. It is 0% by mass or less.
- thermosetting resin composition for sliding members of the present embodiment can optionally contain, in addition to the components described above, other components such as a curing aid and a shrinkage inhibitor.
- thermosetting resin composition for sliding members of the present invention is a material obtained by blending graphite and a resol-type phenolic resin, and optionally adding fiber filler, wax, silica particles, a coupling agent, and other components. are premixed, heat-kneaded using a heated roll or a twin-screw kneader, cooled, and then pulverized or granulated.
- thermosetting resin composition for sliding members of the present embodiment has a minimum torque value when the torque value is measured over time under the conditions of a rotation speed of 30 rpm and a measurement temperature of 110 ° C. using Labo Plastomill. It is 25 N ⁇ m or less, more preferably 24 N ⁇ m or less. When the minimum torque value is in the above range, the fluidity is excellent, so that injection molding becomes possible and the moldability is excellent.
- thermosetting resin composition for sliding members of the present embodiment can be cured by heating to obtain a cured product.
- the cured product of the present embodiment can have a dimensional change rate measured under Condition 1 below of 0.30% or less, preferably 0.25% or less, and more preferably 0.20% or less.
- the cured product of the present embodiment has a low dimensional change rate under high temperature use and excellent heat resistance, so it is suitable for members such as rotors and vanes of vacuum pumps used at high rotation speed and high temperature. can be used.
- the coefficient of friction of the cured product obtained under the curing conditions described in Condition 1 above, measured under Condition 2 below, is 0.23 or less, preferably 0.21 or less, and more preferably 0.20 or less.
- the cured product of the present embodiment has a small coefficient of friction and excellent slidability, so that it can be suitably used for sliding members such as various pumps.
- the metal abrasion amount of the cured product obtained under the curing conditions described in Condition 1 above, measured under Condition 3 below, is 1.0 mg or less, preferably 0.8 mg or less.
- the hardened product of the present embodiment has a small amount of metal wear and is excellent in slidability, so deterioration of mating members such as various pumps can be suppressed.
- vanes made of a hardened material wear a metal mating member to a small extent, so that the clearance between the members is maintained and the reduction in the air discharge capacity is suppressed.
- the cured product obtained under the curing conditions described in Condition 1 has a coefficient of linear expansion below the glass transition temperature of 20 ppm/K or less, preferably 19 ppm/K or less, and more preferably 18 ppm/K or less. is. Since the cured product of the present embodiment has excellent heat resistance, it can be suitably used for members such as rotors and vanes of vacuum pumps used at high rotational speeds and at high temperatures.
- the glass transition temperature of the cured product obtained under the curing conditions described in condition 1 is 200° C. or higher, preferably 220° C. or higher, and more preferably 240° C. or higher. Since the cured product of the present embodiment has excellent heat resistance, it can be suitably used for sliding members such as rotors and vanes of vacuum pumps used at high rotational speeds and at high temperatures.
- the thermal conductivity of the cured product obtained under the curing conditions described in Condition 1 is 5 w/mK or higher, preferably 8 w/mK or higher, and more preferably 10 w/mK or higher.
- the cured product of the present embodiment is excellent in thermal conductivity, and thus can effectively dissipate heat due to friction, and can be suitably used for sliding members such as rotors and vanes of vacuum pumps.
- the sliding member of the present embodiment is made of a cured product of the thermosetting resin composition for sliding members described above.
- a cured product (molded product) obtained by curing the thermosetting resin composition for a sliding member of the present embodiment has excellent sliding properties and mechanical properties, and has a low rate of dimensional change when heated and excellent heat resistance. Therefore, it can be suitably used as various sliding parts.
- thermosetting resin composition for sliding members of the present embodiment has excellent fluidity, it is possible to obtain sliding members by injection molding, resulting in excellent productivity.
- sliding members include, but are not limited to, gears, bearings, bearing retainers, pulleys, guides, rollers, vanes, and rotors.
- the cured product obtained from the thermosetting resin composition for sliding members of the present embodiment has excellent sliding properties and mechanical properties, and has a low dimensional change rate at high temperatures and excellent heat resistance.
- vacuum pump vanes and/or rotors are used to control the cured product obtained from the thermosetting resin composition for sliding members of the present embodiment.
- thermosetting resin composition for sliding member a material mixture containing each component according to the blending amount (parts by mass) shown in Table 1 below was kneaded with heating rolls having different rotation speeds, cooled into a sheet, and pulverized. A granular molding material (thermosetting resin composition for sliding member) was obtained. Using the obtained thermosetting resin composition for sliding members, physical properties were measured by the following methods.
- ⁇ Metal wear amount (mg) In the pin-on-disk method according to JIS K7218, a sliding speed of 5 m / s, a test pressure of 0.6 MPa, a sliding distance of 18 km, a metal (S45C) is used as the mating material, and the wear amount of the metal after the test against the hardened product is measured. It was measured.
- thermomechanical analyzer EXSTAR6000 manufactured by Seiko Instruments Inc.
- ⁇ Minimum torque value at 110°C The melting torque of the thermosetting resin composition for sliding members was measured over time under the conditions of a rotation speed of 30 rpm and a measurement temperature of 110°C using a Laboplastomill tester (manufactured by Toyo Seiki Seisakusho, 4C150). get the torque value.
- the specific heat (Cp) of the obtained test piece was measured by the DSC method.
- thermosetting resin composition for sliding members of the present invention containing a resol-type phenolic resin and a predetermined amount of graphite has excellent moldability and excellent sliding properties and mechanical properties.
- a cured product having a low dimensional change rate at high temperatures and excellent heat resistance can be obtained, in other words, that these properties are well balanced.
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Abstract
Description
特許文献4には、フェノール樹脂と、無機補強繊維と、金属水和物とを含む摺動部材成形材料が開示されている。フェノール樹脂としては、ノボラック型フェノール樹脂、レゾール型フェノール樹脂が例示されている。
特許文献4~6において、フェノール樹脂としては、ノボラック型フェノール樹脂、レゾール型フェノール樹脂が例示されている。
すなわち、本発明は、以下に示すことができる。
黒鉛と、レゾール型フェノール樹脂と、を含み、
前記黒鉛を55質量%以上82質量%以下の量で含有する、摺動部材用熱硬化性樹脂組成物が提供される。
前記摺動部材用熱硬化性樹脂組成物を硬化してなる硬化物が提供される。
前記硬化物からなる摺動部材が提供される。
前記摺動部材を含む真空ポンプが提供される。
前記摺動部材用熱硬化性樹脂組成物をインジェクション成形する工程を含む、摺動部材の製造方法が提供される。
黒鉛としては、特に限定されず、土状黒鉛、鱗状黒鉛などがあり、いずれも使用することができる。
また、熱伝導率の高い黒鉛を用いると摺動時に発生する熱を排熱しやくなり、熱の影響を抑えられることが期待できる。そのような黒鉛としては鱗状黒鉛、鱗片状黒鉛、球状黒鉛が挙げられ、1種または2種以上を組み合わせ用いることができる。
なお、平均粒子径は、レーザー回折散乱法によって求めた黒鉛の粒度分布において、体積積算が50%での粒径(D50)を意味する。
レゾール型フェノール樹脂は、原料のフェノール類とアルデヒド類とを、塩基性触媒の存在下で、通常、フェノール類に対するアルデヒド類のモル比(アルデヒド類/フェノール類)を1.3~1.7として反応させて得ることができる。もちろん、レゾール型フェノール樹脂は、市販品であってもよい。
原料としてフェノール類を1種のみを用いてもよいし、2種以上を併用してもよい。
原料としてアルデヒド類を1種のみを用いてもよいし、2種以上を併用してもよい。
数平均分子量は、ゲルパーミエーションクロマトグラフ(GPC)により、ポリスチレン標準物質を用いて作成した検量線をもとに算出することができる。
本実施形態の摺動部材用熱硬化性樹脂組成物は、本発明の効果に影響を及ぼさない範囲で、さらに繊維フィラーを含むことができ、好ましくは15質量%以下、より好ましくは10質量%以下、特に好ましくは8質量%以下の量で含むことができる。
本実施形態の摺動部材用熱硬化性樹脂組成物は、さらにワックスを含むことができる。ワックスとしては、本発明の効果を奏する範囲で公知のワックスを用いることができ、パラフィンワックス、モンタンワックス、及びカルナウバワックス等の天然ワックス、炭化水素系ワックス、高級脂肪酸、及び高級脂肪酸を誘導して得られるワックス等が挙げられる。ワックスは、1種を単独で用いてもよく、2種以上を組み合わせて用いてもよい。
本実施形態の摺動部材用熱硬化性樹脂組成物は、さらにシリカ粒子を含むことができる。シリカ粒子を含むことにより、硬化物のガラス転移温度以下における線膨張係数をさらに低下させることができ、高回転数、高温下で使用される真空ポンプのローターやベーンのような部材により好適に用いることができる。
本実施形態の摺動部材用熱硬化性樹脂組成物は、さらにカップリング剤を含むことができる。カップリング剤を含むことにより、黒鉛と樹脂との親和性が向上し、その結果、得られる硬化物(摺動部材)の機械的強度をより一層向上させることができる。
本実施形態の摺動部材用熱硬化性樹脂組成物は、必要に応じて、上述の成分以外に、その他の成分として、硬化助剤、収縮抑制剤等を含むことができる。
本発明の摺動部材用熱硬化性樹脂組成物は、黒鉛、およびレゾール型フェノール樹脂を配合し、必要に応じて繊維フィラー、ワックス、シリカ粒子、カップリング剤、その他の成分などを添加した材料を予備混合した後、加熱ロールまたは二軸混練機等を用いて加熱混練し、冷却後に粉砕または造粒化して得ることができる。
本実施形態の摺動部材用熱硬化性樹脂組成物は、ラボプラストミルを用いて回転数30rpm、測定温度110℃の条件でトルク値を経時的に測定した際に、最低トルク値が好ましくは25N・m以下、より好ましくは24N・m以下である。
最低トルク値が上記範囲にあることにより、流動性に優れることから、インジェクション成形が可能となり成形性に優れる。
本実施形態の摺動部材用熱硬化性樹脂組成物は加熱硬化することにより硬化物を得ることができる。
このように、本実施形態の硬化物は高温使用下における寸法変化率が低く耐熱性に優れることから、高回転数、高温下で使用される真空ポンプのローターやベーンのような部材に好適に用いることができる。
金型温度175℃、硬化時間3分間で成形された直径50mm×高さ3mmの略円柱状の硬化物において、加熱前の直径をA、200℃で1,000時間加熱した後の直径をBとし、式:[(A-B)/A]×100により算出する。
このように、本実施形態の硬化物は摩擦係数が小さく、摺動性に優れることから、各種ポンプ等の摺動部材に好適に用いることができる。
JIS K7218に準拠したピンオンディスク法において、滑り速度5m/s、試験圧力0.6MPa、滑り距離18km、相手材に金属(S45C)を用いて、前記硬化物の摩擦係数を測定する。
このように、本実施形態の硬化物は金属摩耗量が小さく、摺動性に優れることから、各種ポンプ等の相手部材の劣化を抑制することができる。例えば、真空ポンプにおいては、硬化物からなるベーン等が金属製の相手部材を摩耗する量が小さいことから、部材間のクリアランスが保たれ、空気の排出能力の低下が抑制される。
JIS K7218に準拠したピンオンディスク法において、滑り速度5m/s、試験圧力0.6MPa、滑り距離18km、相手材に金属(S45C)を用い、前記硬化物に対する試験前後の前記金属の摩耗量を測定する。
このように本実施形態の硬化物は耐熱性に優れることから、高回転数、高温下で使用される真空ポンプのローターやベーンのような部材に好適に用いることができる。
このように本実施形態の硬化物は耐熱性に優れることから、高回転数、高温下で使用される真空ポンプのローターやベーンのような摺動部材に好適に用いることができる。
このように本実施形態の硬化物は熱伝導性に優れることから摩擦による熱を効果的に放熱することができ、真空ポンプのローターやベーンのような摺動部材に好適に用いることができる。
本実施形態の摺動部材は、上述の摺動部材用熱硬化性樹脂組成物の硬化物からなる。
本実施形態の摺動部材用熱硬化性樹脂組成物を硬化してなる硬化物(成形品)は、摺動特性および機械特性に優れ、さらに熱時の寸法変化率が低く耐熱性に優れているので、各種摺動部品として好適に用いることが出来る。
・レゾール型フェノール樹脂:住友ベークライト社製、PR-53529
・ノボラック型フェノール樹脂:(住友ベークライト社製、PR-51470)
・硬化助剤:ヘキサメチレンテトラミン
・黒鉛:西村黒鉛社製 土状黒鉛
・ガラス繊維:日東紡社製、チョップドストランド
・ワックス:日本油脂社製、ステアリン酸
・シリカ粒子:ELKEM社製、線膨張係数0.5ppm/K、平均粒径150nm
各実施例および比較例について、下記表1に示す配合量(質量部)に従って各成分を配合した材料混合物を回転速度の異なる加熱ロールで混練し、シート状に冷却したものを粉砕することにより、顆粒状の成形材料(摺動部材用熱硬化性樹脂組成物)を得た。
得られた摺動部材用熱硬化性樹脂組成物を用いて、以下の方法で物性を測定した。
・動摩擦係数:
金型温度175℃、硬化時間3分間で直径50mm×高さ3mmの略円柱状の硬化物を成形し、JIS K7218に準拠したピンオンディスク法において、滑り速度5m/s、試験圧力0.6MPa、滑り距離18km、相手材に金属(S45C)を用いて、前記硬化物の摩擦係数を測定した。
JIS K7218に準拠したピンオンディスク法において、滑り速度5m/s、試験圧力0.6MPa、滑り距離18km、相手材に金属(S45C)を用い、前記金属に対する試験後の前記硬化物の樹脂摩耗量を測定した。
JIS K7218に準拠したピンオンディスク法において、滑り速度5m/s、試験圧力0.6MPa、滑り距離18km、相手材に金属(S45C)を用い、前記硬化物に対する試験後の前記金属の摩耗量を測定した。
・寸法変化(%):
金型温度175℃、硬化時間3分間で成形された直径50mm×高さ3mmの略円柱状の硬化物において、加熱前の直径をA、200℃で1,000時間加熱した後の直径をBとし、式:[(A-B)/A]×100により算出した。
前記硬化物について、セイコーインスツルメント社製熱機械分析装置EXSTAR6000を用いて、空気雰囲気下、5℃/分で測定を行った。
・インジェクション成形の可否:
東芝機械製射出成形機EC-100NRを用いて、金型温度175℃、硬化時間1分で ISO3167に準拠した試験片の成形を行い、以下の判定基準でインジェクション成形の可否を評価した。
〇:外観良好
×:未充填部がある
ラボプラストミル試験機(東洋精機製作所社製、4C150)を用いて、回転数30rpm、測定温度110℃の条件で摺動部材用熱硬化性樹脂組成物の溶融トルクを経時的に測定し、最低トルク値を得た。
・曲げ強度(MPa)及び曲げ弾性率(GPa):
インジェクション成形の可否を判断するに際して成形された上記試験片を用い、ISO 178に準じて曲げ強度、弾性率を測定した。
・熱伝導率:
(硬化物の作製)
インジェクション成形の可否を判断するに際して成形された上記試験片から□10mmの熱拡散率測定用サンプルを切り出し、熱拡散率測定に用いた。
得られた上記の試験片について、DSC法により比熱(Cp)を測定した。
次に、上記試験片を□10x厚み2mmに切り出しNEYZSCH社製のXeフラッシュアナライザーLFA447を用いて非定常法により板状の試験片の厚み方向の熱拡散係数(α)の測定を行った。測定は、大気雰囲気下、25℃の条件下で行った。
硬化物について、得られた熱拡散率(α)、比熱(Cp)、密度(ρ)の測定値から、下記式に基づいて熱伝導率を算出した。
熱伝導率[W/m・K]=α[m2/s]×Cp[J/kg・K]×ρ[g/cm3]
Claims (16)
- 黒鉛と、
レゾール型フェノール樹脂と、
を含み、
前記黒鉛を55質量%以上82質量%以下の量で含有する、摺動部材用熱硬化性樹脂組成物。 - ラボプラストミルを用いて回転数30rpm、測定温度110℃の条件でトルク値を経時的に測定した際に、最低トルク値が25N・m以下である、請求項1に記載の摺動部材用熱硬化性樹脂組成物。
- さらに繊維フィラーを15質量%以下の量で含む、請求項1または2に記載の摺動部材用熱硬化性樹脂組成物。
- さらにシリカ粒子を3質量%以上30質量%以下の量で含む、請求項1~3のいずれかに記載の摺動部材用熱硬化性樹脂組成物。
- 前記シリカ粒子の線膨張係数が、1ppm/K以下である、請求項4に記載の摺動部材用熱硬化性樹脂組成物。
- 以下の条件で測定される、前記摺動部材用熱硬化性樹脂組成物の硬化物の寸法変化率が0.30%以下である、請求項1~5のいずれかに記載の摺動部材用熱硬化性樹脂組成物。
(条件)
金型温度175℃、硬化時間3分間で成形された直径50mm×高さ3mmの略円柱状の硬化物において、加熱前の直径をA、200℃で1,000時間加熱した後の直径をBとし、式:[(A-B)/A]×100により算出する。 - 以下の条件で測定される、前記摺動部材用熱硬化性樹脂組成物の硬化物の摩擦係数が0.23以下である、請求項1~6のいずれかに記載の摺動部材用熱硬化性樹脂組成物。
(条件)
金型温度175℃、硬化時間3分間で直径50mm×高さ3mmの略円柱状の硬化物を成形し、JIS K7218に準拠したピンオンディスク法において、滑り速度5m/s、試験圧力0.6MPa、滑り距離18km、相手材に金属(S45C)を用いて、前記硬化物の摩擦係数を測定する。 - 以下の条件で測定される、金属摩耗量が1.0mg以下である、請求項1~7のいずれかに記載の摺動部材用熱硬化性樹脂組成物。
(条件)
金型温度175℃、硬化時間3分間で直径50mm×高さ3mmの略円柱状の硬化物を成形し、JIS K7218に準拠したピンオンディスク法において、滑り速度5m/s、試験圧力0.6MPa、滑り距離18km、相手材に金属(S45C)を用い、前記硬化物に対する試験前後の前記金属の摩耗量を測定する。 - 前記摺動部材用熱硬化性樹脂組成物の硬化物のガラス転移温度以下における線膨張係数が20ppm/K以下である、請求項1~8のいずれかに記載の摺動部材用熱硬化性樹脂組成物。
- 前記摺動部材用熱硬化性樹脂組成物の硬化物のガラス転移温度が200℃以上である、請求項1~9のいずれかに記載の摺動部材用熱硬化性樹脂組成物。
- 前記摺動部材用熱硬化性樹脂組成物の硬化物の熱伝導率が5w/mK以上である、請求項1~10のいずれかに記載の摺動部材用熱硬化性樹脂組成物。
- 前記黒鉛は鱗状黒鉛、鱗片状黒鉛および球状黒鉛から選択された少なくとも1種を含む、請求項1~11のいずれかに記載の摺動部材用熱硬化性樹脂組成物。
- 請求項1~12のいずれかに記載の摺動部材用熱硬化性樹脂組成物を硬化してなる硬化物。
- 請求項13に記載の硬化物からなる摺動部材。
- 請求項14に記載の摺動部材を含む真空ポンプ。
- 請求項1~12のいずれかに記載の摺動部材用熱硬化性樹脂組成物をインジェクション成形する工程を含む、摺動部材の製造方法。
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JP2005036127A (ja) * | 2003-07-16 | 2005-02-10 | Kyocera Chemical Corp | フェノール樹脂成形材料およびその成形品 |
JP2005126548A (ja) * | 2003-10-23 | 2005-05-19 | Sumitomo Bakelite Co Ltd | フェノール樹脂成形材料 |
JP2011016888A (ja) * | 2009-07-08 | 2011-01-27 | Oiles Corp | 導電性フェノール樹脂成形材料及びこれを用いた導電性フェノール樹脂摺動部材 |
JP2012025940A (ja) * | 2010-06-25 | 2012-02-09 | Panasonic Electric Works Co Ltd | フェノール樹脂成形材料及びフェノール樹脂成形品 |
WO2015159715A1 (ja) * | 2014-04-16 | 2015-10-22 | 住友ベークライト株式会社 | ポンプ、および樹脂組成物 |
JP2017071672A (ja) * | 2015-10-06 | 2017-04-13 | 日立化成株式会社 | 摺動材料及びその成形体、並びに摺動部材 |
-
2021
- 2021-10-20 JP JP2022530813A patent/JP7168128B1/ja active Active
- 2021-10-20 WO PCT/JP2021/038748 patent/WO2022185601A1/ja active Application Filing
- 2021-10-20 CN CN202180095253.XA patent/CN116897188A/zh active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2003082229A (ja) * | 2001-02-26 | 2003-03-19 | Shin Kobe Electric Mach Co Ltd | 炭素質粉末成形材料及びその製造法、炭素質成形品 |
JP2005036127A (ja) * | 2003-07-16 | 2005-02-10 | Kyocera Chemical Corp | フェノール樹脂成形材料およびその成形品 |
JP2005126548A (ja) * | 2003-10-23 | 2005-05-19 | Sumitomo Bakelite Co Ltd | フェノール樹脂成形材料 |
JP2011016888A (ja) * | 2009-07-08 | 2011-01-27 | Oiles Corp | 導電性フェノール樹脂成形材料及びこれを用いた導電性フェノール樹脂摺動部材 |
JP2012025940A (ja) * | 2010-06-25 | 2012-02-09 | Panasonic Electric Works Co Ltd | フェノール樹脂成形材料及びフェノール樹脂成形品 |
WO2015159715A1 (ja) * | 2014-04-16 | 2015-10-22 | 住友ベークライト株式会社 | ポンプ、および樹脂組成物 |
JP2017071672A (ja) * | 2015-10-06 | 2017-04-13 | 日立化成株式会社 | 摺動材料及びその成形体、並びに摺動部材 |
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