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公开(公告)号：EP3020757A4
公开(公告)日：2017-02-22
申请号：EP14823504
申请日：2014-06-18
Applicant: NOK CORP
Inventor： YAMOTO HIROMITSU , KOMIYA EIJI , AOYAGI YUICHI , FURUKAWA TOMONORI
CPC classification number: C08K3/04 , C08K5/18 , C08K5/372 , C08K2201/014 , C08L9/02 , F16C33/72 , F16C33/76 , F16C33/82 , F16C41/002 , F16C2208/10 , F16J15/3284
Abstract: A nitrile rubber composition comprising 5 to 50 parts by weight of carbon black, 5 to 60 parts by weight of graphite having an average particle diameter of 5 µm or less, 5 to 50 parts by weight of conductive carbon other than carbon black and graphite, and, as antioxidants, 1 to 5 parts by weight of alkylated diphenylamine comprising a diphenylamine reaction product with styrene and 2,4,4-trimethylpentene, and 0.5 to 2.5 parts by weight of N,N'-di-2-naphthyl-p-phenylenediamine or dilauryl thiodipropionate, based on 100 parts by weight of nitrile rubber. The nitrile rubber composition can yield a vulcanization molded product, besides maintaining characteristics as a conductive material, satisfying muddy water resistance, sealing properties, and low torque characteristics required for rolling bearing oil seals for vehicles, etc., and having a rubber volume change coefficient kept low when the product is washed with water after exposure to an antifreezing agent.
Abstract translation: 一种丁腈橡胶组合物，其特征在于，含有碳黑5〜50重量份，平均粒径5μm以下的石墨5〜60重量份，碳黑以外的导电性碳和石墨5〜50重量份， 和作为抗氧化剂的1-5重量份的包含与苯乙烯和2,4,4-三甲基戊烯的二苯胺反应产物的烷基化二苯胺和0.5-2.5重量份的N，N'-二-2-萘基-p - 苯二胺或硫代二丙酸二月桂酯，基于100重量份的丁腈橡胶。 除了维持作为导电材料的特性以外，丁腈橡胶组合物还能够得到硫化成型体，其满足车辆用滚动轴承油封等所要求的耐泥泞水性，密封性和低转矩特性，并且橡胶体积变化系数 当产品在暴露于防冻剂后用水洗涤时保持低水平。
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公开(公告)号：EP2960290A4
公开(公告)日：2016-10-05
申请号：EP14754893
申请日：2014-02-05
Applicant: NOK CORP
Inventor： YAMOTO HIROMITSU , KOMIYA EIJI , FURUKAWA TOMONORI
CPC classification number: H01F1/113 , C08K3/22 , C08K2003/2206 , C08K2003/2265 , C08K2201/01 , C08L9/02 , C08L15/00 , G01D5/245 , G06K7/087
Abstract: A nitrile rubber composition comprising 1,000 to 1,200 parts by weight of a magnetic powder having a compressed density of 3.4 to 3.7, based on 100 parts by weight of nitrile rubber, hydrogenated nitrile rubber, or a blend rubber thereof, the rubber having a Mooney viscosity ML 1+4 (100°C) of 20 to 50. The nitrile rubber composition that does not undergo deterioration of roll processability and adhesion to molds during product vulcanization even when a large amount (e.g., 1,000 parts by weight or more) of magnetic powder is added based on 100 parts by weight of nitrile rubber, hydrogenated nitrile rubber, or a blend rubber thereof.
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公开(公告)号：EP3020758A4
公开(公告)日：2017-02-22
申请号：EP14823729
申请日：2014-06-18
Applicant: NOK CORP
Inventor： YAMOTO HIROMITSU , KOMIYA EIJI , AOYAGI YUICHI , FURUKAWA TOMONORI , KAISE TOMOHIRO
CPC classification number: C08K3/04 , C08K5/13 , C08K5/40 , C08K2201/003 , C08K2201/014 , C08L9/02 , F16C33/76 , F16C33/82
Abstract: A nitrile rubber composition comprising 5 to 50 parts by weight of carbon black, 5 to 60 parts by weight of graphite having an average particle diameter of 5 µm or less, 5 to 50 parts by weight of conductive carbon other than these carbon black and graphite, and 0.5 to 3.5 parts by weight of 2,5-di-tert-butylhydroquinone or 2,5-di-tert-amylhydroquinone as an antioxidant, based on 100 parts by weight of nitrile rubber. The nitrile rubber composition can yield a vulcanization molded product, besides maintaining characteristics as a conductive material, satisfying muddy water resistance, sealing properties, and low torque characteristics required for rolling bearing oil seals for vehicles, etc., and having a rubber volume change kept low when the product is washed with water after exposure to an antifreezing agent.
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4.发明公开
公开(公告)号：EP3150664A4
公开(公告)日：2017-12-06
申请号：EP15789404
申请日：2015-04-30
Applicant: NOK CORP
Inventor： FURUKAWA TOMONORI
CPC classification number: C08K3/22 , C08J3/24 , C08J5/12 , C08J2323/08 , C08J2333/10 , C08K5/14 , C08K2003/2206 , C08L33/08 , F16J15/10 , F16J15/102
Abstract: An object of the present invention is to provide an ethylene-acrylic rubber composition that is excellent in the compression set and also in the crosslinking bonding even when no secondary crosslinking is caused therein, an ethylene-acrylic rubber produced by causing primary crosslinking in the composition, a rubber metal composite formed by bonding the ethylene-acrylic rubber and a metal with each other, and a bonded piston sealing including the rubber metal composite. The object is achieved by an ethylene-acrylic rubber composition including 1 to 7 phr by weight of calcium hydroxide relative to 100 phr by weight of a binary ethylene-acrylic rubber polymer that includes ethylene and an acrylic acid ester, an ethylene-acrylic rubber produced by causing peroxide-crosslinking by primary crosslinking in the ethylene-acrylic rubber composition, a rubber metal composite formed by crosslinking-bonding the ethylene-acrylic rubber and a metal with each other bonded with the primary crosslinking, and a bonded piston sealing including the rubber metal composite.
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