US20130337271A1 - Sliding material composition and sliding member - Google Patents

Sliding material composition and sliding member Download PDF

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Publication number
US20130337271A1
US20130337271A1 US13/985,924 US201213985924A US2013337271A1 US 20130337271 A1 US20130337271 A1 US 20130337271A1 US 201213985924 A US201213985924 A US 201213985924A US 2013337271 A1 US2013337271 A1 US 2013337271A1
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United States
Prior art keywords
resin
sliding
sliding member
vol
material composition
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Abandoned
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US13/985,924
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English (en)
Inventor
Masaru Yoshikawa
Takashi Tomikawa
Toru Kawai
Tasuku SAKURAI
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Honda Motor Co Ltd
Taiho Kogyo Co Ltd
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Honda Motor Co Ltd
Taiho Kogyo Co Ltd
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Assigned to TAIHO KOGYO CO., LTD., HONDA MOTOR CO., LTD. reassignment TAIHO KOGYO CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KAWAI, TORU, SAKURAI, TASUKU, TOMIKAWA, TAKASHI, YOSHIKAWA, MASARU
Publication of US20130337271A1 publication Critical patent/US20130337271A1/en
Abandoned legal-status Critical Current

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    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M157/00—Lubricating compositions characterised by the additive being a mixture of two or more macromolecular compounds covered by more than one of the main groups C10M143/00 - C10M155/00, each of these compounds being essential
    • C10M157/02—Lubricating compositions characterised by the additive being a mixture of two or more macromolecular compounds covered by more than one of the main groups C10M143/00 - C10M155/00, each of these compounds being essential at least one of them being a halogen-containing compound
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    • C10M105/00—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound
    • C10M105/56—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing nitrogen
    • C10M105/58—Amines, e.g. polyalkylene polyamines, quaternary amines
    • C10M105/60—Amines, e.g. polyalkylene polyamines, quaternary amines having amino groups bound to an acyclic or cycloaliphatic carbon atom
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    • C10M111/00—Lubrication compositions characterised by the base-material being a mixture of two or more compounds covered by more than one of the main groups C10M101/00 - C10M109/00, each of these compounds being essential
    • C10M111/04—Lubrication compositions characterised by the base-material being a mixture of two or more compounds covered by more than one of the main groups C10M101/00 - C10M109/00, each of these compounds being essential at least one of them being a macromolecular organic compound
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    • C10M2201/102—Silicates
    • C10M2201/103—Clays; Mica; Zeolites
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    • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/1003—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds used as base material
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    • C10M2213/06—Perfluoro polymers
    • C10M2213/062—Polytetrafluoroethylene [PTFE]
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    • C10M2217/04—Macromolecular compounds from nitrogen-containing monomers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • Y10T428/3154—Of fluorinated addition polymer from unsaturated monomers
    • Y10T428/31544—Addition polymer is perhalogenated

Definitions

  • the present invention relates to a sliding material composition and a sliding member and, in particular, relates to a sliding material composition suitable for a sliding member whose counterpart sliding material is configured of rubber.
  • a sliding material composition containing a binder resin, a solid lubricant, and an N ⁇ -monoacyl basic amino acid (refer to patent document 1)
  • a sliding material composition containing a heat resisting resin, a fluorine resin, a solid lubricant, organopolysiloxane, and an organic solvent (refer to patent document 2).
  • the sliding material composition described in patent document 1 is low in friction and excellent in abrasion resistance in the case of sliding under no lubrication condition, i.e., in a dry state where there is no fluid lubrication such as oil and grease.
  • a coefficient of friction is large in the case of sliding under mixed lubrication, i.e., under a condition where each of fluid lubrication (lubrication in an atmosphere where there is oil or grease) and boundary lubrication (lubrication in an atmosphere where there is no oil or grease) may occur, particularly when the counterpart sliding member is a rubber-based material.
  • the present inventors have completed the invention by founding that a low friction effect can be obtained by lowering coefficient of static friction, since the rubber, which is an elastic body, is high in hysteresis in sliding against a rubber-based material and a coefficient of static friction at starting of sliding is high, and by obtaining knowledge on abrasion resistance. That is, the invention relates to a sliding material composition and a sliding member described hereinafter.
  • a sliding material composition for use in a sliding member whose counterpart sliding member is configured of rubber comprising: a binder resin; 5 to 25 vol % of an N ⁇ -monoacyl basic amino acid; 5 to 25 vol % of molybdenum disulfide; and 5 to 20 vol % of polytetrafluoroethylene (PTFE).
  • 10 vol % or less of at least one kind of solid lubricant selected from a group consisting of graphite, tungsten disulfide, mica, a fluorine resin other than polytetrafluoroethylene, boron nitride, graphite fluoride, and fullerene.
  • at least one kind of inorganic additive selected from a group consisting of SiC, alumina, Si 3 N 4 , TiO 2 , SiO 2 , calcium carbonate, barium sulfate, and calcium phosphate.
  • the binder resin is at least one kind of resin selected from a group consisting of a polyamideimide resin, a polyimide resin, a phenol resin, a polyacetal resin, a polyether ether ketone resin, and a polyphenylene sulfide resin.
  • a sliding member whose counterpart sliding member is configured of rubber, the sliding member comprising: a base material formed of a material selected from the group consisting of iron and steel, stainless steel, cast iron, copper, copper alloy, aluminum, aluminum alloy, rubber, plastics and ceramics; and a coating layer provided on the surface of the base material and including: a binder resin, 5 to 25 vol % of an N ⁇ -monoacyl basic amino acid, 5 to 25 vol % of molybdenum disulfide, and 5 to 20 vol % of polytetrafluoroethylene.
  • the sliding member according to any of the above [7] to [9], wherein the coating layer contains 10 vol % or less of at least one kind of solid lubricant selected from a group consisting of graphite, tungsten disulfide, mica, a fluorine resin other than polytetrafluoroethylene, boron nitride, graphite fluoride, and fullerene.
  • the coating layer contains 10 vol % or less of at least one kind of solid lubricant selected from a group consisting of graphite, tungsten disulfide, mica, a fluorine resin other than polytetrafluoroethylene, boron nitride, graphite fluoride, and fullerene.
  • the sliding member according to any of the above [7] to [10], wherein the coating layer contains at least one kind of inorganic additive selected from a group consisting of SiC, alumina, Si 3 N 4 , SiO 2 , calcium carbonate, barium sulfate, and calcium phosphate.
  • the coating layer contains at least one kind of inorganic additive selected from a group consisting of SiC, alumina, Si 3 N 4 , SiO 2 , calcium carbonate, barium sulfate, and calcium phosphate.
  • the binder resin is at least one kind of resin selected from a group consisting of a polyamideimide resin, a polyimide resin, a phenol resin, a polyacetal resin, a polyether ether ketone resin, and a polyphenylene sulfide resin.
  • a sliding material composition and a sliding member capable of achieving a low abrasion property at starting time and during sliding and being excellent in abrasion resistance, especially when the counterpart sliding member is a rubber-based material, can be provided.
  • FIG. 1 is a schematic drawing of a reciprocating sliding testing machine used in the Examples.
  • FIGS. 2 ( a ) and 2 ( b ) are schematic drawings of friction torque testing machines used in the Examples;
  • FIG. 2 ( a ) is a schematic drawing of a top face of the testing machine, and
  • FIG. 2 ( b ) is a schematic sectional view of a bearing used in a test.
  • FIG. 3 is a graph showing results of friction torque tests.
  • a sliding material composition according to the invention (hereinafter also referred to as “the composition of the invention”) comprises a binder resin, 5 to 25 vol % of an N ⁇ -monoacyl basic amino acid, 5 to 25 vol % of molybdenum disulfide, and 5 to 20 vol % of polytetrafluoroethylene (PTF).
  • the composition of the invention comprises a binder resin, 5 to 25 vol % of an N ⁇ -monoacyl basic amino acid, 5 to 25 vol % of molybdenum disulfide, and 5 to 20 vol % of polytetrafluoroethylene (PTF).
  • the binder resin is a material having a function of binding the composition of the invention, and the binder resin is preferably at least one kind of resin selected from the group consisting of a polyamideimide (PAI) resin, a polyimide resin, a phenol resin, a polyacetal resin, a polyether ether ketone resin, and a polyphenylene sulfide resin.
  • PAI polyamideimide
  • PAI polyamideimide
  • composition of the invention contains three kinds of solid lubricants of the N ⁇ -monoacyl basic amino acid, molybdenum disulfide, and PTF, each in a prescribed amount.
  • the composition of the invention contains three kinds of solid lubricants.
  • the first solid lubricant lowers the coefficient of static friction at starting time.
  • the second solid lubricant lowers the coefficient of dynamic friction and is capable of obtaining abrasion resistance.
  • the third solid lubricant lowers the coefficient of dynamic friction in the case of being out of a grease, i.e., in the case of no lubrication.
  • the invention adopted the N ⁇ -monoacyl basic amino acid, which is an amino acid-based solid lubricant, as the first solid lubricant, molybdenum disulfide (MoS 2 ) as the second solid lubricant, and PTFE as the third solid lubricant.
  • N ⁇ -lauroyl-L-lysine As a specific example of the N ⁇ -monoacyl basic amino acid, N ⁇ -lauroyl-L-lysine is exemplified. N ⁇ -Lauroyl-L-lysine is characterized in that it is low in friction property. Accordingly, a low frictional coating composition can be obtained by binding N ⁇ -lauroyl-L-lysine with a binder resin. Since N ⁇ -lauroyl-L-lysine is lower than PTFE and the like in intensity, reduction of abrasion resistance can be suppressed when a solid lubricant such as PTFE coexists.
  • a composite layer of N ⁇ -Lauroyl-L-lysine and the solid lubricant is formed between a counterpart axis and the sliding face during sliding, and therefore, friction is reduced. With the reduction of friction, exothermic temperature of the sliding surface is suppressed, which leads to restraint of damages of the resin composition and composition transferred layer. As a result, excellent abrasion resistance can be obtained.
  • N ⁇ -monoacyl basic amino acid can be easily obtained by introduction of a hydrophobic acyl group into an ⁇ basic amino acid.
  • the examples of the basic amino acids for constituting the N ⁇ -monoacyl basic amino acid for use in the invention include lysine, ornithine and the like, and they may be an optically active substance or a racemic body.
  • the acyl group is preferably a saturated or unsaturated aliphatic acyl group having 8 to 22 carbon atoms.
  • N ⁇ -lauroyl-L-lysine is exemplified.
  • the content of the N ⁇ -monoacyl basic amino acid in the composition is 5 to 25 vol % and preferably 5 to 15 vol %.
  • the content of N ⁇ -monoacyl basic amino acid is in the above range, a good initial low friction effect can be obtained.
  • the content of molybdenum disulfide in the composition of the invention is 5 to 25 vol % and preferably 5 to 15 vol %. When the content of molybdenum disulfide is in the above range, a good abrasion resistance can be obtained.
  • the content of polytetrafluoroethylene (PTFE) in the composition of the invention is 5 to 20 vol % and preferably 5% to 15 vol %. When the content of PTFE is in the above range, a good low friction effect can be obtained.
  • PTFE polytetrafluoroethylene
  • the average particle size of PTFE is preferably 0.5 ⁇ m to 20 ⁇ m, and more preferably 1 ⁇ m to 10 ⁇ m.
  • a ratio of X to Y satisfies a relationship of 2 ⁇ X/Y ⁇ 3 on a volume basis.
  • X/Y is 2 or more, the oil in the grease is sufficiently retained and the coefficient of friction can be lessened, and is therefore preferable.
  • X/Y is 3 or less, the low friction effect of the N ⁇ -monoacyl basic amino acid becomes sufficient and the coefficient of friction can be lessened, and is therefore preferable.
  • composition of the invention may contain solid lubricants other than the above solid lubricants from the point of imparting a low friction property, and inorganic additives in view of providing abrasion resistance.
  • the solid lubricants other than the above solid lubricants at least one kind of solid lubricant selected from a group consisting of graphite, tungsten disulfide, mica, a fluorine resin other than PTFE, boron nitride, graphite fluoride, and fullerene is preferable. Also, from the point of low friction, the content of the solid lubricant in the composition is preferably 10 vol % or less.
  • the inorganic additive at least one kind of inorganic additive selected from a group consisting of SiC, alumina, Si 3 N 4 , TiO 2 , SiO 2 , calcium carbonate, barium sulfate, and calcium phosphate is preferable. Also, from the viewpoint of abrasion resistance, the content of the inorganic additive in the composition is preferably 1 to 5 vol %.
  • the sliding material composition according to the invention can be used as a coating layer of a base material surface of the sliding member.
  • the sliding material composition of the invention is suitable for coating on the sliding surface in the case where the counterpart sliding member is rubber.
  • a sealing component for a hub bearing part for a vehicle may be specifically exemplified.
  • the material of the base material of the sliding member according to the invention is not especially restricted, but a material selected from a group consisting of iron and steel, stainless steel, cast iron, copper, copper alloy, aluminum, aluminum alloy, rubber, plastics and ceramics is preferable.
  • a shape of the base material is not especially restricted, and may be plate-like or tube-like.
  • the forming method of the coating layer for example, a method of mixing the composition of the invention with a solvent of a resin, forming a film with a known method such as air spray coating or the like, and baking the film at a baking temperature of the resin can be applied. Further, in order to strengthen the coating, surface roughening treatment may be carried out prior to coating of the base material surface, or an adhesive layer may be provided between the base material and the coating layer.
  • a thickness of the coating layer is preferably 5 ⁇ m to 30 ⁇ m.
  • the surface roughness of the coating layer is not especially restricted, but is preferably 0.3 ⁇ m Ra to 3 ⁇ m Ra.
  • the lubrication condition of the sliding member according to the invention is not especially restricted, and can be used in any of oil lubrication, grease lubrication and no lubrication.
  • the SUS base material was spray coated with a composition shown in the following Table 1 in a thickness of about 15 ⁇ m.
  • Amihope LL registered trademark of Ajinomoto Co., Inc. was used as the N ⁇ -lauroyl-L-lysine
  • HPC-5300 of Hitachi Chemical Co., Ltd. was used as the polyamideimide (PAI) resin.
  • An average particle size of graphite was 1 ⁇ m, and an average particle size of molybdenum disulfide was 1.0 ⁇ m.
  • the obtained film was baked at 200° C. to prepare a test specimen.
  • test specimens in the Examples and the Comparative Examples were subjected to a reciprocating sliding test, and the coefficient of friction and abrasion loss of each test specimen were measured.
  • the test specimen in Example 5 was subjected to a friction torque test.
  • the results of the reciprocating sliding test are shown in Table 1 and the results of the friction torque test are shown in FIG. 3 .

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Lubricants (AREA)
  • Sliding-Contact Bearings (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
US13/985,924 2011-02-18 2012-02-16 Sliding material composition and sliding member Abandoned US20130337271A1 (en)

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US10760027B2 (en) 2014-05-16 2020-09-01 Nok Klueber Co., Ltd. Sliding member having coating film and method for forming coating film
US11097519B2 (en) 2016-11-22 2021-08-24 Ks Gleitlager Gmbh Polyamide-based surface material with fillers for sliding element
CN114016295A (zh) * 2021-11-11 2022-02-08 中国科学院兰州化学物理研究所 一种具有梯度润滑结构的纤维织物复合材料及其制备方法和应用
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
US11905371B2 (en) 2018-08-17 2024-02-20 Lg Chem, Ltd. Low friction resin composites

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CN105199812A (zh) * 2015-10-26 2015-12-30 胡波 一种纳米磨合剂
CN105291505A (zh) * 2015-11-02 2016-02-03 梅州市星泰环保科技有限公司 一种高强度耐磨金属制品
CN105387078B (zh) * 2015-12-11 2018-02-09 浙江大学 一种用于滚动轴承的复合材料及其应用
CN106221670A (zh) * 2016-08-27 2016-12-14 明光瑞尔非金属材料有限公司 一种烧结台车间隙密封材料生产工艺
CN109983105B (zh) * 2016-11-22 2022-11-25 Ks滑动轴承有限公司 基于聚酰胺的滑动材料
DE102017107959A1 (de) * 2017-04-12 2018-10-18 Ks Gleitlager Gmbh Gleitmaterial auf PTFE-Polymerbasis mit die tribologischen Eigenschaften verbessernden Füllstoffen
JP7216538B2 (ja) * 2018-12-17 2023-02-01 大豊工業株式会社 摺動部材
JP7222690B2 (ja) * 2018-12-17 2023-02-15 大豊工業株式会社 摺動部材
CN110791359B (zh) * 2019-11-05 2022-06-28 安徽中天石化股份有限公司 一种基于改性纳米碳酸钙的润滑油及其制备方法
CN111853516B (zh) * 2020-06-15 2021-07-13 中国科学院兰州化学物理研究所 一种在工程基材上获得二维复合超润滑表面的方法

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Publication number Priority date Publication date Assignee Title
US10760027B2 (en) 2014-05-16 2020-09-01 Nok Klueber Co., Ltd. Sliding member having coating film and method for forming coating film
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
US11097519B2 (en) 2016-11-22 2021-08-24 Ks Gleitlager Gmbh Polyamide-based surface material with fillers for sliding element
US11905371B2 (en) 2018-08-17 2024-02-20 Lg Chem, Ltd. Low friction resin composites
CN114016295A (zh) * 2021-11-11 2022-02-08 中国科学院兰州化学物理研究所 一种具有梯度润滑结构的纤维织物复合材料及其制备方法和应用

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WO2012111774A1 (ja) 2012-08-23
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JPWO2012111774A1 (ja) 2014-07-07
EP2677021A4 (en) 2014-08-20

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