公开(公告)号：US20200217418A1

公开(公告)日：2020-07-09

申请号：US16647552

申请日：2018-08-21

Applicant: NOK CORPORATION

Inventor： Shunsuke ABE ,  Hideyuki MURAKAMI

IPC: F16J15/3284 ,  C08L15/00 ,  C08K3/04 ,  C08K3/22 ,  C08K5/14

Abstract: A sealing member for mechanical seals, which is a peroxide vulcanized molded article of a hydrogenated nitrile rubber having a bound acrylonitrile content of less than 20% and an iodine number of 20 mg/100 g or less. The sealing member for mechanical seals is obtained as a peroxide vulcanized molded article of a hydrogenated nitrile rubber composition comprising 0 to 5 parts by weight of carbon black, 20 to 100 parts by weight of silica, and 0.5 to 3 parts by weight of silane coupling agent, based on 100 parts by weight of hydrogenated nitrile rubber, and preferably further compounding 50 parts by weight or less of titanium oxide non-reinforcing filler. The obtained vulcanized molded article is to provide a sealing member for mechanical seals that can achieve desired LLC resistance, and that has excellent compression set characteristics, cold resistance, processability, hardness, etc.

公开(公告)号：US20230416506A1

公开(公告)日：2023-12-28

申请号：US18036962

申请日：2021-11-04

Applicant: NOK CORPORATION

Inventor： Shunsuke ABE

IPC: C08L9/02 ,  C08K9/06 ,  C08K5/5419 ,  C08K3/08 ,  H01F1/117

CPC classification number: C08L9/02 ,  C08K9/06 ,  C08K5/5419 ,  C08K3/08 ,  H01F1/117 ,  C08K2201/01 ,  C08K2201/005 ,  C08K2003/0856

Abstract: A nitrile rubber-based composition comprising 1,000 to 2,500 parts by weight of a magnetic powder or silylated magnetic powder having a compressed density of 3.4 to 3.7 g/cm3, 0.5 to 20 parts by weight of alkoxyalkylsilane, and 8 to 40 parts by weight of a plasticizer, based on 100 parts by weight of nitrile rubber, hydrogenated nitrile rubber, or blend rubber thereof. The nitrile rubber-based composition that does not cause deterioration in roll processability and in adhesion between an adhesive applied to a metal plate and the rubber, even when a magnetic powder is added at a ratio as high as 1,000 parts by weight or more based on 100 parts by weight of nitrile rubber, hydrogenated nitrile rubber, or blend rubber thereof.

公开(公告)号：US20210147639A1

公开(公告)日：2021-05-20

申请号：US16623909

申请日：2018-06-28

Applicant: NOK CORPORATION

Inventor： Hideyuki MURAKAMI ,  Shunsuke ABE

IPC: C08J3/22 ,  C08L27/16 ,  C08L27/18 ,  C08L27/20 ,  F16J15/3284 ,  C08J3/00

Abstract: A fluororubber composition that is a kneaded mixture of a carbon nanotube masterbatch comprising 4 to 20 parts by weight of multilayer carbon nanotubes, which are fibrous carbon nanostructures that do not contain monolayer carbon nanotubes, based on 100 parts by weight of a fluororubber polymer, and a fluororubber raw material comprising at least a fluororubber polymer and a reinforcing filler, in which the multilayer carbon nanotubes are compounded in an amount of 0.5 to 6 wt. % in the kneaded mixture. The kneading is performed using a roll or a kneader when the fluororubber composition is produced. The fluororubber composition can provide a fluororubber crosslinked molded article that exhibits abrasion resistance and blister resistance.

公开(公告)号：US20200247990A1

公开(公告)日：2020-08-06

申请号：US16488375

申请日：2018-08-29

Applicant: NOK CORPORATION

Inventor： Shunsuke ABE

IPC: C08L71/03 ,  C08K3/04 ,  C08K3/34 ,  C08K3/06 ,  C08K5/14

Abstract: An epichlorohydrin rubber composition that includes 100 parts by weight of an epichlorohydrin-ethylene oxide-allyl glycidyl ether terpolymer rubber, 0 to 60 parts by weight of carbon black, and 30 to 60 parts by weight of a flat tiller. The crosslinked epichlorohydrin rubber is prepared by crosslinking the composition with a crosslinking agent. Materials for accumulators contain the crosslinked rubber.