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).
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Publication number: 20200040157Abstract: 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: ApplicationFiled: April 11, 2018Publication date: February 6, 2020Inventors: Jitsuo Oda, Yasushi Konda, Junya Yamada, Toyofumi Otaka, Atsuro Yamazaki
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Patent number: 9416241Abstract: 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: GrantFiled: February 6, 2012Date of Patent: August 16, 2016Assignee: Osaka Soda Co., Ltd.Inventors: Taro Ozaki, Toshiyuki Funayama, Toyofumi Otaka, Koshiro Hamaguchi, Motoki Kitagawa, Tadahiro Ono
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Patent number: 9404022Abstract: 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: GrantFiled: November 10, 2011Date of Patent: August 2, 2016Assignee: OSAKA SODA CO., LTD.Inventors: Koshiro Hamaguchi, Motoki Kitagawa, Toyofumi Otaka, Taro Ozaki, Yoritaka Yasuda
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Patent number: 9051464Abstract: 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: GrantFiled: March 2, 2011Date of Patent: June 9, 2015Assignee: DAISO CO., LTD.Inventors: Koshiro Hamaguchi, Toyofumi Otaka, Taro Ozaki, Akiko Mishima
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Patent number: 8920894Abstract: 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: GrantFiled: June 1, 2010Date of Patent: December 30, 2014Assignee: Daiso Co., Ltd.Inventors: Toyofumi Otaka, Koushiro Hamaguchi, Yoritaka Yasuda, Taro Ozaki
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Patent number: 8871118Abstract: 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: GrantFiled: October 28, 2009Date of Patent: October 28, 2014Assignee: Daiso Co., Ltd.Inventors: Yoritaka Yasuda, Toyofumi Otaka, Tadahiro Ono, Koushiro Hamaguchi
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Publication number: 20140316021Abstract: 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: ApplicationFiled: February 6, 2012Publication date: October 23, 2014Applicant: DAISO CO., LTD.Inventors: Taro Ozaki, Toshiyuki Funayama, Toyofumi Otaka, Koshiro Hamaguchi, Motoki Kitagawa, Tadahiro Ono
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Patent number: 8835566Abstract: 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: GrantFiled: October 26, 2007Date of Patent: September 16, 2014Assignee: Daiso Co., Ltd.Inventors: Shigeru Shoji, Toyofumi Otaka, Toshiyuki Funayama, Yasushi Hamura
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Publication number: 20130236670Abstract: 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: ApplicationFiled: November 10, 2011Publication date: September 12, 2013Applicant: DAISO CO., LTD.Inventors: Koshiro Hamaguchi, Motoki Kitagawa, Toyofumi Otaka, Taro Ozaki, Yoritaka Yasuda
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Patent number: 8492000Abstract: 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: GrantFiled: January 28, 2009Date of Patent: July 23, 2013Assignee: Daiso Co., Ltd.Inventors: Toshiyuki Funayama, Shigeru Shoji, Toyofumi Otaka
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Publication number: 20120322916Abstract: 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: ApplicationFiled: March 2, 2011Publication date: December 20, 2012Applicant: DAISO CO., LTD.Inventors: Koshiro Hamaguchi, Toyofumi Otaka, Taro Ozaki, Akiko Mishima
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Patent number: 8283039Abstract: 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: GrantFiled: March 24, 2006Date of Patent: October 9, 2012Assignee: Daiso Co., Ltd.Inventors: Toshiyuki Funayama, Shigeru Shoji, Yasushi Hamura, Toyofumi Otaka
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Patent number: 8258222Abstract: 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: GrantFiled: November 23, 2005Date of Patent: September 4, 2012Assignee: Daiso Co., Ltd.Inventors: Toyofumi Otaka, Shigeru Shoji, Yasushi Hamura, Toshiyuki Funayama
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Publication number: 20120141712Abstract: 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: ApplicationFiled: June 1, 2010Publication date: June 7, 2012Applicant: DAISO CO., LTD.Inventors: Toyofumi Otaka, Koushiro Hamaguchi, Yoritaka Yasuda, Taro Ozaki
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Publication number: 20110210296Abstract: 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: ApplicationFiled: October 28, 2009Publication date: September 1, 2011Applicant: DAISO CO., LTD.Inventors: Yoritaka Yasuda, Toyofumi Otaka, Tadahiro Ono, Koushiro Hamaguchi
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Publication number: 20110160344Abstract: 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: ApplicationFiled: October 26, 2007Publication date: June 30, 2011Applicant: Daisco Co. LtdInventors: Shigeru Shoji, Toyofumi Otaka, Toshiyuki Funayama, Yasushi Hamura
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Publication number: 20100297452Abstract: 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: ApplicationFiled: January 28, 2009Publication date: November 25, 2010Applicant: DAISO CO., LTD.Inventors: Toshiyuki Funayama, Shigeru Shoji, Toyofumi Otaka
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Publication number: 20060216518Abstract: 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: ApplicationFiled: March 24, 2006Publication date: September 28, 2006Applicant: DAISO CO., LTD.Inventors: Toshiyuki Funayama, Shigeru Shoji, Yasushi Hamura, Toyofumi Otaka
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Publication number: 20060128857Abstract: 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: ApplicationFiled: November 23, 2005Publication date: June 15, 2006Applicant: DAISO CO., LTD.Inventors: Toyofumi Otaka, Shigeru Shoji, Yasushi Hamura, Toshiyuki Funayama