WO2000055275A1 - Materiau de frottement - Google Patents

Materiau de frottement Download PDF

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Publication number
WO2000055275A1
WO2000055275A1 PCT/JP2000/001579 JP0001579W WO0055275A1 WO 2000055275 A1 WO2000055275 A1 WO 2000055275A1 JP 0001579 W JP0001579 W JP 0001579W WO 0055275 A1 WO0055275 A1 WO 0055275A1
Authority
WO
WIPO (PCT)
Prior art keywords
potassium
granular
friction material
titanate
friction
Prior art date
Application number
PCT/JP2000/001579
Other languages
English (en)
Japanese (ja)
Inventor
Hiroshi Ogawa
Original Assignee
Otsuka Kagaku Kabushiki Kaisha
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Otsuka Kagaku Kabushiki Kaisha filed Critical Otsuka Kagaku Kabushiki Kaisha
Priority to AU31914/00A priority Critical patent/AU3191400A/en
Publication of WO2000055275A1 publication Critical patent/WO2000055275A1/fr

Links

Classifications

    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • F16D69/02—Composition of linings ; Methods of manufacturing
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G23/00—Compounds of titanium
    • C01G23/003—Titanates
    • C01G23/005—Alkali titanates

Definitions

  • the present invention relates to a friction material suitable as a material for a braking member, for example, a material for a clutch facing, a material for a brake, and the like used in a braking device for an automobile, an aircraft, a railway vehicle, and industrial equipment.
  • a friction material suitable as a material for a braking member for example, a material for a clutch facing, a material for a brake, and the like used in a braking device for an automobile, an aircraft, a railway vehicle, and industrial equipment.
  • a friction material in a braking member a friction material obtained by dispersing asbestos in an organic or inorganic binder and binding and forming the same has been used.
  • Potassium titanate fiber does not have the carcinogenic properties of Asbestos, has excellent heat resistance, and has the excellent features of being effective in preventing the fade phenomenon and improving the thermal stability of friction characteristics.
  • potassium titanate fiber is bulky and inferior in flowability due to its fiber shape, and has a problem in productivity in that it adheres to the wall of the supply passage during production and blocks it. are doing.
  • potassium titanate fiber is a fibrous powder, it is liable to generate dust and has a problem in terms of workability that deteriorates a work environment.
  • thermosetting resin such as a phenol resin
  • a friction material such as a brake
  • fibrous potassium titanate when fibrous potassium titanate is blended, a If the fiber breaks during the manufacturing process, potassium ions are eluted from the broken cross section, changing the resin viscosity and its curing characteristics, and causing a variation in physical properties. Disclosure of the invention
  • the present invention has been made in view of the above-mentioned conventional problems, and has an object to provide a friction material which is excellent in friction and wear characteristics even at a high temperature, is excellent in productivity and workability, and has little variation in physical properties. It is assumed that.
  • the friction material of the present invention is characterized in that granular potassium titanate is blended as a friction modifier.
  • the friction material having the above-mentioned structure contains granular potassium titanate as a friction modifier, the friction material has an advantage that thermal stability of friction characteristics is improved and friction and wear characteristics are excellent even at a high temperature. It is also possible to prevent acid potassium from adhering to the supply path and generating dust, and it becomes a friction material with excellent workability and productivity. In addition, physical properties are less variable than when potassium titanate fiber is used.
  • particle size of the potassium titanate include those having an average particle size of 0.1 to 100 zm, preferably 5 to 80 / m. These potassium titanates may contain various metal oxides and the like.
  • the term “addition” includes coating, carrying, interlayer introduction or solid solution.
  • granular potassium titanate potassium 6 titanate or potassium 8 titanate is preferred because of its excellent thermal stability. No.
  • granular potassium titanate granular potassium titanate, granular hexatitanium acid rim, and granular potassium titanate can be produced, for example, by the following production method.
  • the first production method is a method in which a titanium-containing compound and a potassium-containing compound are compounded with a boron-containing compound in an amount of 5% by weight or more in terms of oxide in terms of the ratio of the titanium-containing compound.
  • the titanium-containing compound can be selected as appropriate from titanium oxide or a compound that generates titanium oxide by heating.
  • the potassium-containing compound can be appropriately selected from potassium oxide or a compound that generates potassium oxide by heating, and examples thereof include potassium oxide, potassium hydroxide, potassium carbonate, and potassium oxalate. These can be used alone or in combination of two or more.
  • the boron-containing compound can be appropriately selected from boron oxide and a compound capable of generating boron oxide by heating.
  • Boron oxide, boron, boric acid and salts thereof eg, alkali metal salts such as sodium salt and potassium salt
  • Alkaline earth metal salts such as calcium salt, magnesium salt, barium salt, ammonium salt, etc., metaboric acid and its salts (alkali metal salts such as sodium salt, potassium salt, calcium salt, magnesium salt, barium salt, etc.) Earth metal salts, ammonium salts, etc.).
  • alkali metal salts such as sodium salt and potassium salt
  • Alkaline earth metal salts such as calcium salt, magnesium salt, barium salt, ammonium salt, etc.
  • metaboric acid and its salts alkali metal salts such as sodium salt, potassium salt, calcium salt, magnesium salt, barium salt, etc.
  • Earth metal salts ammonium salts, etc.
  • boron oxide and boric acid are preferred. These can be used
  • the mixing ratio of the titanium-containing compound and the potassium-containing compound can be appropriately selected depending on the kind of the target potassium titanate.For example, when producing granular potassium hexatitanate, the potassium-containing compound and the titanium-containing compound are used. Is preferably about 1: 2 to 6, preferably about 1: 3 to 5, in terms of a weight conversion ratio of potassium oxyacid: titanium oxide.
  • the compounding amount of the boron-containing compound is usually 5 parts by weight or more, preferably 5 to 100 parts by weight, more preferably 100 parts by weight of titanium-containing compound in terms of boron oxide. Is preferably 10 to 40 parts by weight. If the amount of the boron-containing compound is less than 5 parts by weight, the production of fibrous potassium titanate increases, which is not preferable. On the other hand, if the amount is more than 100 parts by weight, the effect is not changed, which is uneconomical.
  • the target substance, granular potassium titanate can be produced by mixing and firing a titanium-containing compound, a potassium-containing compound, and a boron-containing compound. Mixing can be performed in any order by any means. The calcination is carried out in the air or under an oxidizing atmosphere, usually at about 600 to 1200 ° C., preferably at 75 to 110 ° C., usually for 0.5 to 20 hours, preferably for about 0.5 to 20 hours. It may be performed for 2 to 10 hours. In firing, a flux such as potassium salt, potassium sulfate, potassium molybdate and the like may be used.
  • the resultant After firing, the resultant is cooled, and if necessary, the obtained fired product is pulverized, pulverized, and classified to obtain a particulate titanate rim used as the friction modifier of the present invention.
  • the first production method is a method particularly suitable for producing granular hexatitanium power rim.
  • the second method for producing granular potassium titanate used as the friction modifier of the present invention granular potassium dititanate is obtained by washing the granular potassium dititanate with water, removing a portion of the power-ream ions, and then firing. Consisting of Until now, a method for efficiently producing granular potassium titanate has not been known, but according to this method, it is efficient. Potassium tetratitanate can be produced in large quantities.
  • the granular potassium dititanate is obtained by calcining titanium oxide and carbonated lime at 800 to 950 ° C, preferably 850 to 900 ° C for 1 to 5 hours in the presence of potassium chloride, and crushing and classifying. Can be manufactured.
  • Washing of the granular potassium dititanate with water can be performed by charging the granular potassium dititanate into water to form a slurry and stirring for 1 to 5 hours.
  • the firing is preferably performed at 750 to 1000 ° C., preferably around 900 ° C. for about 1 to 3 hours.
  • potassium ions are further removed by subjecting the granular potassium titanate obtained in the second production method to an acid treatment or a neutralization treatment. After adjusting to an appropriate titanium / potassium ratio by means of baking, a granular 6 titanate rim and a granular 8 titanate are obtained.
  • examples of the acid used in the acid treatment or the neutralization treatment include sulfuric acid, nitric acid, hydrochloric acid, boric acid, and carbonic acid.
  • examples of granular potassium octa titanate for example, granulated potassium tetratitanate is put into water to form a slurry, and the mixture is treated with stirring at a pH of about 7.5 for 1 to 10 hours, and then 0.5 to 900 ° C. This can be performed by firing for 10 hours.
  • the amount of the particulate potassium titanate is preferably 3 to 50% by weight.
  • the blending amount is preferably 3 to 50% by weight.
  • the granular potassium titanate can be used alone or in combination of two or more kinds. When two or more kinds are used in combination, the total amount thereof is 3 to 50% by weight. Is preferred.
  • a friction material comprising a base fiber, a friction modifier and a binder
  • the mixing ratio of each component in the friction material is 1 to 60 parts by weight of the base fiber
  • friction Examples of the modifier include 20 to 80 parts by weight, including granular potassium titanate, 10 to 40 parts by weight of a binder, and 0 to 60 parts by weight of other components.
  • the base fiber examples include resin fiber such as aramide fiber, metal fiber such as steel fiber and brass fiber, carbon fiber, glass fiber, ceramic fiber, rock wool, and wood pulp. These base fibers are subjected to a surface treatment such as a silane coupling agent such as an aminosilane, an epoxysilane or a vinylsilane, a titanate coupling agent, or a phosphate ester in order to improve dispersibility and adhesion to a binder. It may be used by applying.
  • a silane coupling agent such as an aminosilane, an epoxysilane or a vinylsilane
  • titanate coupling agent such as a titanate coupling agent
  • phosphate ester phosphate ester
  • friction modifier other friction modifiers may be used in combination with the granular potassium titanate as long as the effects of the present invention are not impaired.
  • vulcanized or unvulcanized natural or synthetic rubber powder organic resin powder such as cash resin powder, resin dust, rubber dust, carbon black, graphite powder, molybdenum disulfide, barium sulfate, calcium carbonate, clay, Talc, diatomaceous earth, antigorite, sepiolite, montmorillonite, zeolite, fibrous sodium titanate, fibrous sodium pentatitanate, granular sodium trititanate, granular sodium pentatitanate, fibrous 4titanium Inorganic powders such as potassium titanate, fibrous potassium titanate, fibrous potassium titanate, plate-like potassium titanate, plate-like potassium titanate, metal powders such as copper, aluminum, zinc, and iron, and alumina , Silica, chromium oxide, titanium oxide, iron oxide and other oxide powders. Wear.
  • organic resin powder such as cash resin powder, resin dust, rubber dust, carbon black, graphite powder, molybdenum disulfide, barium sulfate
  • binder examples include thermosetting resins such as phenol resin, formaldehyde resin, melamine resin, epoxy resin, acrylic resin, aromatic polyester resin, and urea resin, natural rubber, nitrile rubber, butadiene rubber, styrene butadiene rubber, and chloroprene.
  • thermosetting resins such as phenol resin, formaldehyde resin, melamine resin, epoxy resin, acrylic resin, aromatic polyester resin, and urea resin, natural rubber, nitrile rubber, butadiene rubber, styrene butadiene rubber, and chloroprene.
  • Elastomers such as rubber, polyisoprene rubber, acrylic rubber, high styrene rubber, styrene propylene copolymer, polyamide resin, polyphenylene sulfide resin, polyether resin, polyimide resin, polyether ether ketone resin, thermoplastic Organic binders such as thermoplastic resins such as liquid crystal polyester resins and alumina And inorganic binders such as silica sol and silicone resin.
  • components such as a gas barrier, a lubricant, and a grinding agent can be blended.
  • the method for producing the friction material of the present invention is not particularly limited, and the friction material can be appropriately produced according to a conventionally known method for producing a friction material.
  • One example is to disperse the base fiber in a binder, mix and combine a friction modifier and other components as needed, adjust the friction material composition, and then add the A method of injecting the composition and heating under pressure to form a binder may be mentioned.
  • the binder is melt-kneaded in a twin-screw extruder, and the base fiber, friction modifier and other components, if necessary, are combined from a side hopper and extrusion-molded. After that, a method of mechanically kneading into a desired shape can be mentioned.
  • the friction material composition is dispersed in water or the like, formed on a paper net, dehydrated and formed into a sheet, and then heated and pressed by a press machine to form a binding. The obtained friction material may be appropriately cut and polished to obtain a desired shape.
  • the potassium titanate as a friction modifier is in a granular form, the fluidity is improved as compared with the case of using a fiber-shaped potassium titanate fiber.
  • the fiber is not broken, potassium ions are eluted from the broken cross section, and the resin viscosity and its hardening characteristics are changed, and the physical properties are not varied.
  • the particles are granular, the generation of fibrous dust unlike the fiber powder of potassium titanate is small, and the working environment is improved.
  • the friction material according to the present invention is suitable as a friction material used for a power control device such as a braking device or a transmission device in automobiles, aircraft, railway vehicles, industrial equipment, and the like.
  • a power control device such as a braking device or a transmission device in automobiles, aircraft, railway vehicles, industrial equipment, and the like.
  • the friction material used for the braking device include a brake material
  • examples of the friction material used for the transmission device include a clutch facing material.
  • the obtained granular potassium tetratitanate is poured into water to form a slurry, and boric acid is added to the slurry for neutralization for 2 hours while maintaining the pH of the slurry at 7.5, followed by filtration, drying, and 900 ° C. C was treated for 2 hours to obtain a sintered body.
  • the obtained sintered body was crushed and classified to obtain granular potassium octa titanate having an average particle diameter of 50 m.
  • a mixture of titanium oxide, titanium dioxide, carbon dioxide, chloride, and boric acid in a weight ratio of 5: 2.5: 1: 1 was heated to 1055 ° C over 5 hours. After holding for a period of time, the mixture was cooled to 600 ° C over 1 hour, and then cooled to room temperature to obtain a sintered body. The obtained sintered body was crushed and classified to obtain granular potassium hexatitanate particles having an average particle diameter of 10 ⁇ m.
  • the friction material according to the present invention contains granular titanic acid lithium as a friction modifier, so that the thermal stability of the friction characteristics is improved, and the friction and wear characteristics are improved even at a high temperature.
  • it also prevents potassium titanate from adhering to the supply path and generating dust, making it a friction material with excellent workability and productivity.
  • the physical properties are less variable than when potassium titanate fiber is used.

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  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)

Abstract

L'invention concerne un matériau de frottement présentant d'excellentes propriétés de frottement et d'usure même à hautes températures, d'un excellent rendement et d'une excellente maniabilité, et dont les propriétés matérielles sont peu fluctuantes. Ledit matériau est caractérisé en ce qu'il contient du titanate de potassium particulaire comme régulateur de frottements.
PCT/JP2000/001579 1999-03-16 2000-03-15 Materiau de frottement WO2000055275A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU31914/00A AU3191400A (en) 1999-03-16 2000-03-15 Friction material

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP11/71081 1999-03-16
JP7108199A JP2000264689A (ja) 1999-03-16 1999-03-16 摩擦材

Publications (1)

Publication Number Publication Date
WO2000055275A1 true WO2000055275A1 (fr) 2000-09-21

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ID=13450233

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2000/001579 WO2000055275A1 (fr) 1999-03-16 2000-03-15 Materiau de frottement

Country Status (3)

Country Link
JP (1) JP2000264689A (fr)
AU (1) AU3191400A (fr)
WO (1) WO2000055275A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2544532A2 (fr) 2010-03-12 2013-01-16 Monsanto Technology LLC Compositions agrochimiques en forme de gel
CN108018022A (zh) * 2016-11-01 2018-05-11 曙制动器工业株式会社 摩擦材料

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002055437A1 (fr) * 2001-01-04 2002-07-18 Kawatetsu Mining Co., Ltd. Titanate de potassium en poudre
KR101543809B1 (ko) * 2007-03-29 2015-08-11 도호 티타늄 가부시키가이샤 티탄산 알칼리 및 티탄산 알칼리의 중공체 분말의 제조 방법, 및 이에 의해 수득된 티탄산 알칼리 및 그 중공체 분말, 및 이를 포함하는 마찰재
EP2130798B1 (fr) 2007-04-04 2018-05-16 Otsuka Chemical Co., Ltd. Titanate de potassium, son procédé de fabrication, matériaux de friction et compositions de résine
JP5261757B2 (ja) 2007-06-08 2013-08-14 大塚化学株式会社 六チタン酸ナトリウム及びその製造方法
JP5702080B2 (ja) * 2010-06-08 2015-04-15 曙ブレーキ工業株式会社 摩擦材及び摩擦材用造粒物

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0753214A (ja) * 1993-08-10 1995-02-28 Kawatetsu Mining Co Ltd チタン酸アルカリ粉末、その製造方法、その含有複合材料及びチタン酸アルカリ焼結体の製造方法
JPH10139431A (ja) * 1996-11-11 1998-05-26 Otsuka Chem Co Ltd 粒状６チタン酸カリウム及びその製造方法
EP0900949A1 (fr) * 1997-09-04 1999-03-10 Sumitomo Electric Industries, Ltd. Matériau de friction fritté

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0753214A (ja) * 1993-08-10 1995-02-28 Kawatetsu Mining Co Ltd チタン酸アルカリ粉末、その製造方法、その含有複合材料及びチタン酸アルカリ焼結体の製造方法
JPH10139431A (ja) * 1996-11-11 1998-05-26 Otsuka Chem Co Ltd 粒状６チタン酸カリウム及びその製造方法
EP0900949A1 (fr) * 1997-09-04 1999-03-10 Sumitomo Electric Industries, Ltd. Matériau de friction fritté

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2544532A2 (fr) 2010-03-12 2013-01-16 Monsanto Technology LLC Compositions agrochimiques en forme de gel
US11419329B2 (en) 2010-03-12 2022-08-23 Monsanto Technology Llc Agrochemical gel compositions
CN108018022A (zh) * 2016-11-01 2018-05-11 曙制动器工业株式会社 摩擦材料
EP3351819A1 (fr) * 2016-11-01 2018-07-25 Akebono Brake Industry Co., Ltd. Matériau de frottement
US10151367B2 (en) 2016-11-01 2018-12-11 Akebono Brake Industry Co., Ltd. Friction material

Also Published As

Publication number Publication date
AU3191400A (en) 2000-10-04
JP2000264689A (ja) 2000-09-26

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