WO2022024984A1 - Article moulé en caoutchouc - Google Patents

Article moulé en caoutchouc Download PDF

Info

Publication number
WO2022024984A1
WO2022024984A1 PCT/JP2021/027521 JP2021027521W WO2022024984A1 WO 2022024984 A1 WO2022024984 A1 WO 2022024984A1 JP 2021027521 W JP2021027521 W JP 2021027521W WO 2022024984 A1 WO2022024984 A1 WO 2022024984A1
Authority
WO
WIPO (PCT)
Prior art keywords
rubber
oil
parts
molded product
weight
Prior art date
Application number
PCT/JP2021/027521
Other languages
English (en)
Japanese (ja)
Inventor
貴寛 安斎
敦 横田
Original Assignee
Nok株式会社
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 Nok株式会社 filed Critical Nok株式会社
Publication of WO2022024984A1 publication Critical patent/WO2022024984A1/fr

Links

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
    • C08K3/34—Silicon-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L21/00—Compositions of unspecified rubbers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
    • C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L27/12—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing

Definitions

  • the present invention relates to a rubber molded product. More specifically, the present invention relates to a rubber molded product used as an oil seal or the like.
  • Oil seals are widely used as important machine parts in fields such as automobiles and industrial machinery. Of these, double-rotation oil seals, which aim to keep the fluid sealed even during both forward and reverse rotation of various parts, are used as parts for parts such as pumps, automobile differentials, agricultural machinery, and railroad vehicles. It is used in a wide range of fields.
  • the conventionally used oil seal may cause leakage of the sealed fluid when the member in contact with the oil seal is rotated in the forward rotation direction and then reversed.
  • the applicant first used fluororubber which has excellent oil resistance and fuel oil resistance and is used as a sealing material for O-rings, packings, etc. in a wide range of fields such as automobiles and industrial machinery, as a rubber material, and weighs 100 rubber.
  • a fluororubber composition prepared by adding 1 to 100 parts by weight of wollastonite with an aspect ratio of 8 or more per part and kneading it is vulcanized to form a sliding surface.
  • Patent Document 2 as a molding material for an oil seal which is excellent in durability such as heat resistance and wear resistance and can sufficiently satisfy lubrication oil resistance and sealing property, an average per 100 parts by weight of fluororubber is used.
  • a fluororubber composition containing 3 to 60 parts by weight of at least one of diatomaceous earth, wollastonite, talc, graphite and carbon fiber having a particle size of 6 to 35 ⁇ m has been proposed.
  • the sliding surface of the shaft may be damaged by the metal foreign matter contained in the oil in the oil seal for both forward and reverse rotation, and in this case, it becomes necessary to replace the shaft.
  • the metal foreign matter contained in the oil intervenes in the sliding surface of the lip and the shaft as a factor of damaging the shaft, that is, the foreign matter bites into the sliding surface. , It is estimated that the shaft will be damaged.
  • An object of the present invention is to provide a rubber molded product that can be suitably used as a sealing material for an oil seal or the like, which can suppress the biting of a metallic foreign substance into the oil seal for both forward and reverse rotation.
  • An object of the present invention is to contain 10 to 50 parts by weight of a filler having an average particle size of 0.2 to 5.0 ⁇ m per 100 parts by weight of rubber, and the arithmetic average height Sa of the cross-sectional roughness of the vulcanized molded product is 0.1 to 1.0. Achieved by a rubber molded product of ⁇ m.
  • the rubber molded product according to the present invention contains a filler having an average particle size of 0.2 to 5.0 ⁇ m, and the vulcanized molded product has an arithmetic average height of Sa 0.1 to 1.0 ⁇ m.
  • the rubber molded product of the present invention contains a filler having an average particle size of 0.2 to 5.0 ⁇ m per 100 parts by weight of rubber, and the arithmetic mean height of the cross-sectional roughness of the obtained vulcanized molded product is Sa 0.1 to 1.0. It is ⁇ m.
  • Examples of rubber include fluororubber, nitrile rubber, acrylic rubber, etc., but fluororubber is used from the viewpoint of excellent heat resistance and oil resistance.
  • fluororubber a copolymerized rubber of vinylidene fluoride or tetrafluoroethylene and another fluorine-containing olefin or olefin is used, for example, vinylidene fluoride [VdF] -hexafluoropropylene [HFP] copolymer, fluoride.
  • VdF vinylidene fluoride
  • HFP hexafluoropropylene
  • Examples include former copolymers, and those in which crosslinkable groups such as bromine and / or iodine-containing compounds, nitrile groups, glycidyl groups, hydroxyalkyl groups, and perfluorophenyl groups are introduced into these various cop
  • Fluorine rubber contains a filler having an average particle size (measured by the laser diffraction / scattering method) of 0.2 to 5.0 ⁇ m, preferably 0.2 to 3.0 ⁇ m, and is 10 to 50 parts by weight, preferably 10 to 50 parts by weight per 100 parts by weight of the fluorine rubber. It is blended in a proportion of 40 parts by weight.
  • the arithmetic average height Sa of the cross-sectional roughness which is the object of the present invention, cannot be imparted to the vulcanized molded product, and the sealing performance is inferior. Will come to be.
  • the average particle size means the average fiber length.
  • the filler is used in a smaller proportion than this, the arithmetic average height Sa of the cross-sectional roughness, which is the object of the present invention, cannot be imparted to the vulcanized molded product, and the sealing performance is deteriorated.
  • it is used in a larger proportion than this, it tends to become sandy at the time of kneading, and kneading becomes impossible.
  • diatomaceous earth polytetrafluoroethylene [PTFE] resin, wollastonite, graphite and the like are preferably used, and diatomaceous earth and PTFE resin are preferably used.
  • PTFE polytetrafluoroethylene
  • a polyol-based or organic peroxide-based compound used for fluororubber vulcanization a polyol-based or organic peroxide-based compound used for fluororubber vulcanization.
  • Vulcanizing agents, vulcanization aids such as quaternary onium salts, phosphate-based vulcanization accelerators, polyfunctional unsaturated compound co-crosslinking agents, reinforcing agents or fillers such as carbon black, oxides of divalent metals
  • the composition is prepared by any kneading means using an open roll, a kneader, etc.
  • an acid receiving agent such as hydroxide and hydrotalcite, and other necessary compounding agents
  • the composition is about 160 to 200.
  • an acid receiving agent such as hydroxide and hydrotalcite, and other necessary compounding agents
  • vulcanization is performed on sealing materials such as oil seals. It is molded.
  • the obtained vulcanized molded product is selected so that the arithmetic average height Sa of the cross-sectional roughness is about 0.1 to 1.0 ⁇ m.
  • the maximum height Sz of the cross-sectional roughness is about 10 to 20 ⁇ m.
  • Example 1 VdF-HFP copolymer (DuPont product Byton A500) 100 parts by weight carbon black (CANCARB product THERMAX N990 LSR) 2 ⁇ Diatomaceous earth (Central silica product Oplite W3005K; 20 ⁇ Average particle size 2.7 ⁇ m) Magnesium Oxide (Kyowa Chemical Industry Product Star Mug CX-150) 5 ⁇ Calcium hydroxide (Omi Chemical Industry product CALDIC # 1000) 5 ⁇ Bisphenol AF 50% by weight Fluororubber diluted product 2.3 ⁇ (Unimatec product CHEMINOX AF-50) 35% by weight phosphate-based vulcanization accelerator diluted product (the company's product B-35F) 1 ⁇
  • Each of the above components is kneaded using a closed kneader and an open roll, and using a 2RT-35t press machine, press vulcanization at 180 ° C for 4 minutes and oven vulcanization at 200 ° C for 15 hours (second
  • Example 2 In Example 1, the amount of carbon black was changed to 13.5 parts by weight and the amount of diatomaceous earth was changed to 14.1 parts by weight.
  • Example 3 In Example 1, the amount of carbon black was changed to 18 parts by weight, and the same amount (20 parts by weight) of PTFE resin (AGC product FLUON PTFE L-172JE; average particle size 0.24 ⁇ m) was used instead of diatomaceous earth. ..
  • Example 4 In Example 3, the amount of carbon black was changed to 30 parts by weight and used.
  • Example 1 Comparative Example 1 In Example 1, the same amount (20 parts by weight) of the central chemical product SILIKA # 6B (average particle diameter 12.6 ⁇ m) was used as diatomaceous earth.
  • Example 3 carbon beads (Gun Ei Chemical Industry Co., Ltd. Marilin GC-025; average particle diameter 25 ⁇ m) were used in the same amount (20 parts by weight) instead of diatomaceous earth.
  • Comparative Example 4 In Comparative Example 1, the amount of diatomaceous earth was changed to 70 parts by weight.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

L'invention concerne un article moulé en caoutchouc dans lequel 10 à 50 parties en masse d'une charge de diamètre particulaire moyen compris entre 0,2 et 5,0μm, sont incorporées pour 100 parties en masse de caoutchouc, et la hauteur moyenne arithmétique (Sa) de rugosité en coupe transversale d'un article moulé vulcanisé est comprise entre 0,1 et 1,0μm. Cet article moulé en caoutchouc est tel qu'une charge de diamètre particulaire moyen spécifique est incorporée, une charge procurant une hauteur moyenne arithmétique (Sa) de rugosité en coupe transversale de l'article moulé vulcanisé comprise entre 0,1 et 1,0μm est choisie, de sorte que l'épaisseur d'un film d'huile d'une face coulissante de joint tel qu'un joint étanche à l'huile pour rotation normal ou inverse, ou similaire, est réduite, et d'excellents effets tels qu'une inhibition de la corrosion de la face coulissante du joint et d'un axe par des substances étrangères métalliques est inhibée, sont développés. Ainsi, l'article moulé en caoutchouc de l'invention peut être mis en œuvre de manière adéquate en tant que joint étanche à l'huile, ou similaire.
PCT/JP2021/027521 2020-07-27 2021-07-26 Article moulé en caoutchouc WO2022024984A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2020126459A JP2023159467A (ja) 2020-07-27 2020-07-27 ゴム成形物
JP2020-126459 2020-07-27

Publications (1)

Publication Number Publication Date
WO2022024984A1 true WO2022024984A1 (fr) 2022-02-03

Family

ID=80036230

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2021/027521 WO2022024984A1 (fr) 2020-07-27 2021-07-26 Article moulé en caoutchouc

Country Status (2)

Country Link
JP (1) JP2023159467A (fr)
WO (1) WO2022024984A1 (fr)

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08190270A (ja) * 1994-08-12 1996-07-23 Ntn Corp 現像装置のローラ軸取付構造
JPH08193197A (ja) * 1994-08-12 1996-07-30 Ntn Corp Ｖリング
JP2002338808A (ja) * 2001-05-15 2002-11-27 Shin Etsu Chem Co Ltd 電子写真式画像形成装置用導電性シリコーンゴム組成物
WO2006006468A1 (fr) * 2004-07-08 2006-01-19 Uchiyama Manufacturing Corp. Composition à base de fluorocaoutchouc
JP2006117745A (ja) * 2004-10-20 2006-05-11 Three M Innovative Properties Co フルオロエラストマー含有組成物からなるシール材料
JP2008064201A (ja) * 2006-09-07 2008-03-21 Nok Corp 正・逆両回転用オイルシール
US20100018778A1 (en) * 2008-07-23 2010-01-28 Smith International, Inc. Seal comprising elastomeric composition with nanoparticles
JP2010084049A (ja) * 2008-10-01 2010-04-15 Kyoritsu Sangyo Kk ダイヤフラム
WO2014126240A1 (fr) * 2013-02-18 2014-08-21 イーグル工業株式会社 Joint à lèvre pour pompe à eau
JP2016014092A (ja) * 2014-07-01 2016-01-28 Nok株式会社 フッ素ゴム組成物
JP2016156404A (ja) * 2015-02-23 2016-09-01 光洋シーリングテクノ株式会社 ゴム組成物、及びオイルシール
WO2017150192A1 (fr) * 2016-03-01 2017-09-08 Nok株式会社 Composition de caoutchouc fluoré et caoutchouc fluoré réticulé
WO2019070040A1 (fr) * 2017-10-06 2019-04-11 Ａｇｃ株式会社 Composition de copolymère fluoré, et stratifié caoutchouc-métal

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08190270A (ja) * 1994-08-12 1996-07-23 Ntn Corp 現像装置のローラ軸取付構造
JPH08193197A (ja) * 1994-08-12 1996-07-30 Ntn Corp Ｖリング
JP2002338808A (ja) * 2001-05-15 2002-11-27 Shin Etsu Chem Co Ltd 電子写真式画像形成装置用導電性シリコーンゴム組成物
WO2006006468A1 (fr) * 2004-07-08 2006-01-19 Uchiyama Manufacturing Corp. Composition à base de fluorocaoutchouc
JP2006117745A (ja) * 2004-10-20 2006-05-11 Three M Innovative Properties Co フルオロエラストマー含有組成物からなるシール材料
JP2008064201A (ja) * 2006-09-07 2008-03-21 Nok Corp 正・逆両回転用オイルシール
US20100018778A1 (en) * 2008-07-23 2010-01-28 Smith International, Inc. Seal comprising elastomeric composition with nanoparticles
JP2010084049A (ja) * 2008-10-01 2010-04-15 Kyoritsu Sangyo Kk ダイヤフラム
WO2014126240A1 (fr) * 2013-02-18 2014-08-21 イーグル工業株式会社 Joint à lèvre pour pompe à eau
JP2016014092A (ja) * 2014-07-01 2016-01-28 Nok株式会社 フッ素ゴム組成物
JP2016156404A (ja) * 2015-02-23 2016-09-01 光洋シーリングテクノ株式会社 ゴム組成物、及びオイルシール
WO2017150192A1 (fr) * 2016-03-01 2017-09-08 Nok株式会社 Composition de caoutchouc fluoré et caoutchouc fluoré réticulé
WO2019070040A1 (fr) * 2017-10-06 2019-04-11 Ａｇｃ株式会社 Composition de copolymère fluoré, et stratifié caoutchouc-métal

Also Published As

Publication number Publication date
JP2023159467A (ja) 2023-11-01

Similar Documents

Publication Publication Date Title
JP5825440B2 (ja) フッ素ゴム組成物
JP5895938B2 (ja) ウォーターポンプ用リップシール
JP5786967B2 (ja) 自動車用オイルシール
JP6288398B2 (ja) フッ素ゴム組成物
JP6435666B2 (ja) フッ素ゴム組成物
JP5475867B2 (ja) 自動車用トランスミッションオイルシール
WO2022024984A1 (fr) Article moulé en caoutchouc
JP6451626B2 (ja) フッ素ゴム組成物
JP7316400B1 (ja) 正・逆両回転用オイルシール
JP7219856B2 (ja) フッ素ゴム組成物
JP6540798B2 (ja) フッ素ゴム組成物
JP7476682B2 (ja) 密封部材
JP5273925B2 (ja) チェーンシール
JP2021188003A (ja) 密封部材
JP2006183804A (ja) アルカリ環境用転がり軸受
JP2006200592A (ja) 工作機械用転がり軸受
JP2014178014A (ja) 自動車用オイルシール
JP5528377B2 (ja) 自動車用オイルレベルゲージ
JP2003227523A (ja) ウォータポンプ用軸受
JP2006207810A (ja) 冷却水ポンプ用転がり軸受
JPH1180480A (ja) 潤滑性ゴム組成物

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21849952

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21849952

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP