Patents by Inventor Shinji Higashika

Shinji Higashika has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Vulcanization-bonded laminate, and rubber composition used therefor
    Patent number: 10377885
    Abstract: Provide a laminate constituted by epichlorohydrin rubber layer and fluororubber layer that are strongly vulcanization-bonded together. A rubber laminate constituted by vulcanization-bonding an epichlorohydrin rubber layer that contains at least (a) magnesium oxide, (b) polythiol vulcanizing agent, (c) at least one type of compound selected from 1,8-diazabicyclo (5,4,0) undecene-7,1,5-diazabicyclo (4,3,0) nonene-5, and salts thereof, (d) at least one type of compound selected from organic phosphonium salts and organic ammonium salts, and (e) maleic anhydride modified polybutadiene, and a fluororubber layer; wherein such rubber laminate is characterized in that: the content of the polythiol vulcanizing agent (b) in the epichlorohydrin rubber layer is 0.3 to 1.2 parts by weight per 100 parts by weight of the epichlorohydrin rubber; and the content of the maleic anhydride modified polybutadiene (e) in the epichlorohydrin rubber layer is 0.3 to 1.
    Type: Grant
    Filed: September 2, 2014
    Date of Patent: August 13, 2019
    Assignee: NICHIRIN CO., LTD.
    Inventors: Takaaki Nomura, Shinji Higashika
  • Vulcanization-adhered laminate of fluororubber and synthetic rubber
    Patent number: 9539792
    Abstract: A vulcanization-adhered laminate is constituted by a structure where a fluororubber layer and a synthetic rubber-containing layer are tightly adhered by vulcanization by vulcanization, and the synthetic rubber layer prior to the vulcanization-adhesion includes organic peroxide, silica, organic phosphonium salt, maleic anhydride-modified polybutadiene, and magnesium oxide.
    Type: Grant
    Filed: March 22, 2011
    Date of Patent: January 10, 2017
    Assignee: NICHIRIN CO., LTD.
    Inventors: Shinji Higashika, Takaaki Nomura, Keizo Saga, Shin-ichiro Goto
  • VULCANIZATION-BONDED LAMINATE, AND RUBBER COMPOSITION USED THEREFOR
    Publication number: 20160369090
    Abstract: Provide a laminate constituted by epichlorohydrin rubber layer and fluororubber layer that are strongly vulcanization-bonded together. A rubber laminate constituted by vulcanization-bonding an epichlorohydrin rubber layer that contains at least (a) magnesium oxide, (b) polythiol vulcanizing agent, (c) at least one type of compound selected from 1,8-diazabicyclo (5,4,0) undecene-7,1,5-diazabicyclo (4,3,0) nonene-5, and salts thereof, (d) at least one type of compound selected from organic phosphonium salts and organic ammonium salts, and (e) maleic anhydride modified polybutadiene, and a fluororubber layer; wherein such rubber laminate is characterized in that: the content of the polythiol vulcanizing agent (b) in the epichlorohydrin rubber layer is 0.3 to 1.2 parts by weight per 100 parts by weight of the epichlorohydrin rubber; and the content of the maleic anhydride modified polybutadiene (e) in the epichlorohydrin rubber layer is 0.3 to 1.
    Type: Application
    Filed: September 2, 2014
    Publication date: December 22, 2016
    Inventors: Takaaki NOMURA, Shinji HIGASHIKA
  • VULCANIZATION-ADHERED LAMINATE OF FLUORORUBBER AND SYNTHETIC RUBBER
    Publication number: 20130078472
    Abstract: A vulcanization-adhered laminate is constituted by a structure where a fluororubber layer and a synthetic rubber-containing layer are tightly adhered by vulcanization by vulcanization, and the synthetic rubber layer prior to the vulcanization-adhesion includes organic peroxide, silica, organic phosphonium salt, maleic anhydride-modified polybutadiene, and magnesium oxide.
    Type: Application
    Filed: March 22, 2011
    Publication date: March 28, 2013
    Applicant: NICHIRIN CO., LTD.
    Inventors: Shinji Higashika, Takaaki Nomura, Keizo Saga, Shin-ichiro Goto