Patents by Inventor Toyofumi Otaka

Toyofumi Otaka 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).

  • Publication number: 20200040157
    Abstract: Provided is a nanosubstance-containing composition which exhibits excellent heat resistance in cases where a thermoplastic resin or a rubber is contained therein, while exhibiting high toughness in cases where a thermosetting resin is contained therein. A nanosubstance-containing composition according to the present invention contains (a) at least one component selected from the group consisting of thermoplastic resins, thermosetting resins and rubbers, (b) a compound having a reactive functional group and (c) a nanosubstance.
    Type: Application
    Filed: April 11, 2018
    Publication date: February 6, 2020
    Inventors: Jitsuo Oda, Yasushi Konda, Junya Yamada, Toyofumi Otaka, Atsuro Yamazaki
  • Patent number: 9416241
    Abstract: A composition for sportswear, includes a rubber component (a) which contains an epihalohydrin rubber, a vulcanizing agent (b) in an amount of 0.1 to 10 parts by weight for 100 parts by weight of the rubber component (a), and a foaming agent (c) in an amount of 0.5 to 20 parts by weight therefor. The composition for sportswear is preferably includes a colorant (d).
    Type: Grant
    Filed: February 6, 2012
    Date of Patent: August 16, 2016
    Assignee: Osaka Soda Co., Ltd.
    Inventors: Taro Ozaki, Toshiyuki Funayama, Toyofumi Otaka, Koshiro Hamaguchi, Motoki Kitagawa, Tadahiro Ono
  • Patent number: 9404022
    Abstract: A composition for vulcanizing adhesion, comprises a rubber (a), at least one compound (b) selected from the group consisting of salts of 1,8-diazabicyclo(5.4.0) undecene-7, salts of 1,5-diazabicyclo(4.3.0)-nonene-5, 1,8-diazabicyclo(5.4.0) undecene-7, and 1,5-diazabicyclo(4.3.0)-nonene-5, and at least one water-carrying substance (c) selected from water-absorbed substances and hydrated substances.
    Type: Grant
    Filed: November 10, 2011
    Date of Patent: August 2, 2016
    Assignee: OSAKA SODA CO., LTD.
    Inventors: Koshiro Hamaguchi, Motoki Kitagawa, Toyofumi Otaka, Taro Ozaki, Yoritaka Yasuda
  • Patent number: 9051464
    Abstract: A flame-retardant rubber composition for vulcanization, comprising an epichlorohydrin based rubber (A), red phosphorus (B), and a vulcanizing agent (C), in which the content of the red phosphorus (B) is from 3 to 20 parts by weight for 100 parts by weight of the epichlorohydrin based rubber (A).
    Type: Grant
    Filed: March 2, 2011
    Date of Patent: June 9, 2015
    Assignee: DAISO CO., LTD.
    Inventors: Koshiro Hamaguchi, Toyofumi Otaka, Taro Ozaki, Akiko Mishima
  • Patent number: 8920894
    Abstract: Disclosed is a vulcanized rubber laminate, wherein a thermoplastic resin layer and an unvulcanized epichlorohydrin rubber composition layer containing a specific maleimide compound, vulcanizing agent, and acid acceptor are heated and bonded. Specifically disclosed is a laminate configured by heating and bonding an unvulcanized epichlorohydrin rubber composition layer (A) and a thermoplastic resin (B), wherein the unvulcanized epichlorohydrin rubber composition contains: an epichlorohydrin rubber (a), a compound containing one or more maleimide group within the molecule (b), a vulcanizing agent (c), and an acid acceptor (d).
    Type: Grant
    Filed: June 1, 2010
    Date of Patent: December 30, 2014
    Assignee: Daiso Co., Ltd.
    Inventors: Toyofumi Otaka, Koushiro Hamaguchi, Yoritaka Yasuda, Taro Ozaki
  • Patent number: 8871118
    Abstract: The present invention provides a rubber composition, which realizes low hardness and low compression set while maintaining semi-conductivity, and a vulcanizate thereof. Also the rubber composition can be obtained by blending an epichlorohydrin-based rubber having satisfactory semi-conductivity and an acrylonitrile-butadiene-based rubber as a reactive plasticizer, and also blending zinc oxide, a thiuram-based compound and a quinoxaline-based compound.
    Type: Grant
    Filed: October 28, 2009
    Date of Patent: October 28, 2014
    Assignee: Daiso Co., Ltd.
    Inventors: Yoritaka Yasuda, Toyofumi Otaka, Tadahiro Ono, Koushiro Hamaguchi
  • Publication number: 20140316021
    Abstract: A composition for sportswear, includes a rubber component (a) which contains an epihalohydrin rubber, a vulcanizing agent (b) in an amount of 0.1 to 10 parts by weight for 100 parts by weight of the rubber component (a), and a foaming agent (c) in an amount of 0.5 to 20 parts by weight therefor. The composition for sportswear is preferably includes a colorant (d).
    Type: Application
    Filed: February 6, 2012
    Publication date: October 23, 2014
    Applicant: DAISO CO., LTD.
    Inventors: Taro Ozaki, Toshiyuki Funayama, Toyofumi Otaka, Koshiro Hamaguchi, Motoki Kitagawa, Tadahiro Ono
  • Patent number: 8835566
    Abstract: The present invention provides a vulcanized rubber material having improved heat resistance while maintaining ozone resistance of an epihalohydrin rubber, and a rubber composition for vulcanization for producing the same. The invention further provides a vulcanized rubber material and a rubber composition for vulcanization, that can achieve the above objects without using an organonickel compound having a concern about toxicity, or if used, using the same as less as possible. The present invention relates to a rubber composition for vulcanization comprising (a) 100 parts by weight of an epihalohydrin rubber, (b) 0.01 to 0.5 part by weight of a copper salt of dithiocarbamic acid, (c) an acid acceptor, and (d) a polythiol type vulcanizing agent or a polyol type vulcanizing agent, a vulcanized rubber material obtained by vulcanizing the composition, and an automotive rubber part comprising the vulcanized rubber material.
    Type: Grant
    Filed: October 26, 2007
    Date of Patent: September 16, 2014
    Assignee: Daiso Co., Ltd.
    Inventors: Shigeru Shoji, Toyofumi Otaka, Toshiyuki Funayama, Yasushi Hamura
  • Publication number: 20130236670
    Abstract: A composition for vulcanizing adhesion, comprises a rubber (a), at least one compound (b) selected from the group consisting of salts of 1,8-diazabicyclo(5.4.0) undecene-7, salts of 1,5-diazabicyclo(4.3.0)-nonene-5, 1,8-diazabicyclo(5.4.0) undecene-7, and 1,5-diazabicyclo(4.3.0)-nonene-5, and at least one water-carrying substance (c) selected from water-absorbed substances and hydrated substances.
    Type: Application
    Filed: November 10, 2011
    Publication date: September 12, 2013
    Applicant: DAISO CO., LTD.
    Inventors: Koshiro Hamaguchi, Motoki Kitagawa, Toyofumi Otaka, Taro Ozaki, Yoritaka Yasuda
  • Patent number: 8492000
    Abstract: Disclosed is a vulcanized rubber laminate in which both an unvulcanized epichlorohydrin-based rubber composition layer containing a specific polyfunctional (meth)acrylate compound and a specific vulcanizing agent and an unvulcanized fluororubber composition layer containing a specific vulcanizing agent are heated and bonded, whereby, both rubber layers are firmly bonded.
    Type: Grant
    Filed: January 28, 2009
    Date of Patent: July 23, 2013
    Assignee: Daiso Co., Ltd.
    Inventors: Toshiyuki Funayama, Shigeru Shoji, Toyofumi Otaka
  • Publication number: 20120322916
    Abstract: A flame-retardant rubber composition for vulcanization, comprising an epichlorohydrin based rubber (A), red phosphorus (B), and a vulcanizing agent (C), in which the content of the red phosphorus (B) is from 3 to 20 parts by weight for 100 parts by weight of the epichlorohydrin based rubber (A).
    Type: Application
    Filed: March 2, 2011
    Publication date: December 20, 2012
    Applicant: DAISO CO., LTD.
    Inventors: Koshiro Hamaguchi, Toyofumi Otaka, Taro Ozaki, Akiko Mishima
  • Patent number: 8283039
    Abstract: The invention provides a vulcanized rubber laminate obtained by firmly bonding an unvulcanized epichlorohydrin rubber layer and an organic peroxide-containing fluororubber layer. The laminate is obtained by thermal adhesion a layer of an unvulcanized epichlorohydrin rubber composition to a layer of an unvulcanized fluororubber composition. The epichlorohydrin rubber composition comprises 1) an unvulcanized epichlorohydrin rubber containing 3 to 15 mol % of allyl glycidyl ether unit, 2) quinoxaline-based vulcanizing agents, mercaptotriazine-based vulcanizing agents or bisphenol-based vulcanizing agents, and 3) 1,8-diazabicyclo(5,4,0)undecene-7 salts, 1,5-diazabicyclo(4,3,0)nonene-5 salts, quaternary ammonium salts, quaternary phosphonium salts, basic white carbons or an alkaline metal salt of higher fatty acid the fluororubber composition comprises an fluororubber and an organic peroxide-based vulcanizing agent.
    Type: Grant
    Filed: March 24, 2006
    Date of Patent: October 9, 2012
    Assignee: Daiso Co., Ltd.
    Inventors: Toshiyuki Funayama, Shigeru Shoji, Yasushi Hamura, Toyofumi Otaka
  • Patent number: 8258222
    Abstract: A composition for epihalohydrin vulcanized rubber excellent in heat resistance while keeping good vulcanization rate and store stability, comprising (a) an epihalohydrin robber, (b) a metal soap, (c) an acid acceptor, and (d) a vulcanizing agent, the composition further preferably containing (e) a fatty acid for suppressing vulcanization, or preferably containing (f) an alcohol for accelerating vulcanization.
    Type: Grant
    Filed: November 23, 2005
    Date of Patent: September 4, 2012
    Assignee: Daiso Co., Ltd.
    Inventors: Toyofumi Otaka, Shigeru Shoji, Yasushi Hamura, Toshiyuki Funayama
  • Publication number: 20120141712
    Abstract: Disclosed is a vulcanized rubber laminate, wherein a thermoplastic resin layer and an unvulcanized epichlorohydrin rubber composition layer containing a specific maleimide compound, vulcanizing agent, and acid acceptor are heated and bonded. Specifically disclosed is a laminate configured by heating and bonding an unvulcanized epichlorohydrin rubber composition layer (A) and a thermoplastic resin (B), wherein the unvulcanized epichlorohydrin rubber composition contains: an epichlorohydrin rubber (a), a compound containing one or more maleimide group within the molecule (b), a vulcanizing agent (c), and an acid acceptor (d).
    Type: Application
    Filed: June 1, 2010
    Publication date: June 7, 2012
    Applicant: DAISO CO., LTD.
    Inventors: Toyofumi Otaka, Koushiro Hamaguchi, Yoritaka Yasuda, Taro Ozaki
  • Publication number: 20110210296
    Abstract: The present invention provides a rubber composition, which realizes low hardness and low compression set while maintaining semi-conductivity, and a vulcanizate thereof. Also the rubber composition can be obtained by blending an epichlorohydrin-based rubber having satisfactory semi-conductivity and an acrylonitrile-butadiene-based rubber as a reactive plasticizer, and also blending zinc oxide, a thiuram-based compound and a quinoxaline-based compound.
    Type: Application
    Filed: October 28, 2009
    Publication date: September 1, 2011
    Applicant: DAISO CO., LTD.
    Inventors: Yoritaka Yasuda, Toyofumi Otaka, Tadahiro Ono, Koushiro Hamaguchi
  • Publication number: 20110160344
    Abstract: The present invention provides a vulcanized rubber material having improved heat resistance while maintaining ozone resistance of an epihalohydrin rubber, and a rubber composition for vulcanization for producing the same. The invention further provides a vulcanized rubber material and a rubber composition for vulcanization, that can achieve the above objects without using an organonickel compound having a concern about toxicity, or if used, using the same as less as possible. The present invention relates to a rubber composition for vulcanization comprising (a) 100 parts by weight of an epihalohydrin rubber, (b) 0.01 to 0.5 part by weight of a copper salt of dithiocarbamic acid, (c) an acid acceptor, and (d) a polythiol type vulcanizing agent or a polyol type vulcanizing agent, a vulcanized rubber material obtained by vulcanizing the composition, and an automotive rubber part comprising the vulcanized rubber material.
    Type: Application
    Filed: October 26, 2007
    Publication date: June 30, 2011
    Applicant: Daisco Co. Ltd
    Inventors: Shigeru Shoji, Toyofumi Otaka, Toshiyuki Funayama, Yasushi Hamura
  • Publication number: 20100297452
    Abstract: Disclosed is a vulcanized rubber laminate in which both an unvulcanized epichlorohydrin-based rubber composition layer containing a specific polyfunctional (meth)acrylate compound and a specific vulcanizing agent and an unvulcanized fluororubber composition layer containing a specific vulcanizing agent are heated and bonded, whereby, both rubber layers are firmly bonded.
    Type: Application
    Filed: January 28, 2009
    Publication date: November 25, 2010
    Applicant: DAISO CO., LTD.
    Inventors: Toshiyuki Funayama, Shigeru Shoji, Toyofumi Otaka
  • Publication number: 20060216518
    Abstract: The invention provides a vulcanized rubber laminate obtained by firmly bonding an unvulcanized epichlorohydrin rubber layer and an organic peroxide-containing fluororubber layer. The laminate is obtained by thermal adhesion a layer of an unvulcanized epichlorohydrin rubber composition to a layer of an unvulcanized fluororubber composition. The epichlorohydrin rubber composition comprises 1) an unvulcanized epichlorohydrin rubber containing 3 to 15 mol % of allyl glycidyl ether unit, 2) quinoxaline-based vulcanizing agents, mercaptotriazine-based vulcanizing agents or bisphenol-based vulcanizing agents, and 3) 1,8-diazabicyclo(5,4,0)undecene-7 salts, 1,5-diazabicyclo(4,3,0)nonene-5 salts, quaternary ammonium salts, quaternary phosphonium salts, basic white carbons or an alkaline metal salt of higher fatty acid the fluororubber composition comprises an fluororubber and an organic peroxide-based vulcanizing agent.
    Type: Application
    Filed: March 24, 2006
    Publication date: September 28, 2006
    Applicant: DAISO CO., LTD.
    Inventors: Toshiyuki Funayama, Shigeru Shoji, Yasushi Hamura, Toyofumi Otaka
  • Publication number: 20060128857
    Abstract: A composition for epihalohydrin vulcanized rubber excellent in heat resistance while keeping good vulcanization rate and store stability, comprising (a) an epihalohydrin robber, (b) a metal soap, (c) an acid acceptor, and (d) a vulcanizing agent, the composition further preferably containing (e) a fatty acid for suppressing vulcanization, or preferably containing (f) an alcohol for accelerating vulcanization.
    Type: Application
    Filed: November 23, 2005
    Publication date: June 15, 2006
    Applicant: DAISO CO., LTD.
    Inventors: Toyofumi Otaka, Shigeru Shoji, Yasushi Hamura, Toshiyuki Funayama