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1. 发明公开

EP3020758A4 NITRILE RUBBER COMPOSITION 有权
标题翻译：丁腈
公开(公告)号：EP3020758A4
公开(公告)日：2017-02-22
申请号：EP14823729
申请日：2014-06-18
申请人： NOK CORP
发明人： YAMOTO HIROMITSU , KOMIYA EIJI , AOYAGI YUICHI , FURUKAWA TOMONORI , KAISE TOMOHIRO
IPC分类号： C08L9/02 , C08K3/04 , C08K5/13 , C08K5/40 , F16C33/72 , F16J15/32
CPC分类号： C08K3/04 , C08K5/13 , C08K5/40 , C08K2201/003 , C08K2201/014 , C08L9/02 , F16C33/76 , F16C33/82
摘要： 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.

2. 发明公开

EP3020757A4 NITRILE RUBBER COMPOSITION 有权
标题翻译： NITRILKAUTSCHUKZUSAMMENSETZUNG
公开(公告)号：EP3020757A4
公开(公告)日：2017-02-22
申请号：EP14823504
申请日：2014-06-18
申请人： NOK CORP
发明人： YAMOTO HIROMITSU , KOMIYA EIJI , AOYAGI YUICHI , FURUKAWA TOMONORI
IPC分类号： C08L9/02 , C08K3/04 , C08K5/18 , C08K5/372 , F16C33/72 , F16J15/32
CPC分类号： C08K3/04 , C08K5/18 , C08K5/372 , C08K2201/014 , C08L9/02 , F16C33/72 , F16C33/76 , F16C33/82 , F16C41/002 , F16C2208/10 , F16J15/3284
摘要： 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.
摘要翻译：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。

3. 发明公开

EP2960290A4 NITRILE RUBBER COMPOSITION 有权转让
标题翻译：丁腈
公开(公告)号：EP2960290A4
公开(公告)日：2016-10-05
申请号：EP14754893
申请日：2014-02-05
申请人： NOK CORP
发明人： YAMOTO HIROMITSU , KOMIYA EIJI , FURUKAWA TOMONORI
IPC分类号： C08L9/02 , C08K3/22 , C08L15/00 , G01D5/245
CPC分类号： H01F1/113 , C08K3/22 , C08K2003/2206 , C08K2003/2265 , C08K2201/01 , C08L9/02 , C08L15/00 , G01D5/245 , G06K7/087
摘要： 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.

4. 发明公开

EP3150664A4 ETHYLENE ACRYLIC RUBBER COMPOSITION, ETHYLENE ACRYLIC RUBBER, RUBBER-METAL COMPOSITE, AND BONDED PISTON SEAL 有权
公开(公告)号：EP3150664A4
公开(公告)日：2017-12-06
申请号：EP15789404
申请日：2015-04-30
申请人： NOK CORP
发明人： FURUKAWA TOMONORI
IPC分类号： C08L33/08 , C08J5/12 , C08K3/22 , F16J15/10
CPC分类号： C08K3/22 , C08J3/24 , C08J5/12 , C08J2323/08 , C08J2333/10 , C08K5/14 , C08K2003/2206 , C08L33/08 , F16J15/10 , F16J15/102
摘要： 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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