Patents by Inventor Shuichi Okutsu
Shuichi Okutsu 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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Patent number: 9068053Abstract: A fluoro rubber composition which is able to make both a high tensile strength and a high elongation at break after vulcanization compatible with each other and from which favorable mechanical characteristics are obtained even in a high-temperature environment; and a bladder for tire fabrication, which is manufactured using the same are provided. The fluoro rubber composition includes a rubber component containing a fluoro rubber and carbon black, wherein in a dynamic viscoelasticity test of an unvulcanized rubber by a rubber process analyzer (RPA) (measurement temperature: 100° C., measurement frequency: 1 Hz), a difference ?GA? (G?(1%)?G?(100%)) between a shear modulus G? (1%) at the time of a dynamic strain of 1% and a shear modulus G? (100%) at the time of a dynamic strain of 100% is 120 kPa or more and not more than 3,000 kPa.Type: GrantFiled: August 25, 2010Date of Patent: June 30, 2015Assignees: BRIDGESTONE CORPORATION, E.I. DU PONT DE NEMOURS AND COMPANY, DAIKIN INDUSTRIES, LTD.Inventors: Masashi Yano, Daisuke Ota, Shuichi Okutsu
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Patent number: 9068064Abstract: A fluorine rubber composition that provides high tensile strength and high elongation after vulcanization mutually compatible and from which favorable mechanical characteristics are obtained even in a high-temperature environment; and a bladder for tire production, which is manufactured using the same are provided. The fluorine rubber composition includes a rubber component containing a fluorine rubber and carbon black, wherein the carbon black has a specific surface area by nitrogen adsorption (N2SA) of 25 m2/g or more and not more than 180 m2/g and a dibutyl phthalate (DBP) absorption amount of 60 mL/100 g or more and not more than 180 mL/100 g; and in a kneading step (A) of compounding the carbon black in the rubber component, an average shear rate of a rotor surface of a kneading machine is 100 (1/sec) or more, and a kneading maximum temperature Tm is 120° C. or higher and not higher than 200° C.Type: GrantFiled: August 25, 2010Date of Patent: June 30, 2015Assignees: BRIDGESTONE CORPORATION, E.I. DU PONT DE NEMOURS AND COMPANY, DAIKEN INDUSTRIES, LTD.Inventors: Masashi Yano, Daisuke Ota, Shuichi Okutsu
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Publication number: 20130225758Abstract: A fluoro rubber composition which is able to make both a high tensile strength and a high elongation at break after vulcanization compatible with each other and from which favorable mechanical characteristics are obtained even in a high-temperature environment; and a bladder for tire fabrication, which is manufactured using the same are provided. The fluoro rubber composition includes a rubber component containing a fluoro rubber and carbon black, wherein in a dynamic viscoelasticity test of an unvulcanized rubber by a rubber process analyzer (RPA) (measurement temperature: 100° C., measurement frequency: 1 Hz), a difference ?GA? (G?(1%)?G?(100%)) between a shear modulus G? (1%) at the time of a dynamic strain of 1% and a shear modulus G? (100%) at the time of a dynamic strain of 100% is 120 kPa or more and not more than 3,000 kPa.Type: ApplicationFiled: August 25, 2010Publication date: August 29, 2013Applicants: BRIDGESTONE CORPORATION, DAIKIN INDUSTRIES, LTD., E.I. DU PONT DE NEMOURS AND COMPANYInventors: Masashi Yano, Daisuke Ota, Shuichi Okutsu
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Publication number: 20130217816Abstract: A fluorine rubber composition that provides high tensile strength and high elongation after vulcanization mutually compatible and from which favorable mechanical characteristics are obtained even in a high-temperature environment; and a bladder for tire production, which is manufactured using the same are provided. The fluorine rubber composition includes a rubber component containing a fluorine rubber and carbon black, wherein the carbon black has a specific surface area by nitrogen adsorption (N2SA) of 25 m2/g or more and not more than 180 m2/g and a dibutyl phthalate (DBP) absorption amount of 60 mL/100 g or more and not more than 180 mill 00 g; and in a kneading step (A) of compounding the carbon black in the rubber component, an average shear rate of a rotor surface of a kneading machine is 100 (1/sec) or more, and a kneading maximum temperature Tm is 120° C. or higher and not higher than 200° C.Type: ApplicationFiled: August 25, 2010Publication date: August 22, 2013Applicants: BRIDGESTONE CORPORATION, DAIKIN INDUSTRIES, LTD., E.I. DU PONT DE NEMOURS AND COMPANYInventors: Masashi Yano, Daisuke Ota, Shuichi Okutsu
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Publication number: 20120259054Abstract: A cured fluoroelastomer sensor bushing comprises A) fluoroelastomer having at least 53 wt. % fluorine, and B) 10 to 50 parts by weight, per hundred parts by weight fluoroelastomer, of carbon black a nitrogen adsorption specific surface area of 70-150 m2/g and a dibutyl phthalate absorption of 90-180 ml/100 g.Type: ApplicationFiled: August 4, 2011Publication date: October 11, 2012Applicant: E.I. DU PONT DE NEMOURS AND COMPANYInventor: SHUICHI OKUTSU
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Publication number: 20120202938Abstract: A cured fluoroelastomer part for use in oil and gas exploration and production comprises A) fluoroelastomer having at least 53 wt. % fluorine, and B) more than 20 parts by weight, per hundred parts by weight fluoroelastomer, of carbon black a nitrogen adsorption specific surface area of 70-150 m2/g and a dibutyl phthalate absorption of 90-180 ml/100 g.Type: ApplicationFiled: August 5, 2011Publication date: August 9, 2012Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventors: Tsuyoshi Kawai, Makio Mori, Shuichi Okutsu, Kenji Terauchi
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Publication number: 20120202939Abstract: A cured fluoroelastomer rotary shaft lip seal comprises A) fluoroelastomer having at least 53 wt. % fluorine, and B) 10 to 50 parts by weight, per hundred parts by weight fluoroelastomer, of carbon black a nitrogen adsorption specific area of 70-150 m2/g and a dibutyl phthalate absorption of 90-180 ml/100 g.Type: ApplicationFiled: August 5, 2011Publication date: August 9, 2012Applicant: E.I. DU PONT DE NEMOURS AND COMPANYInventors: Tsuyoshi Kawai, Makio Mori, Shuichi Okutsu
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Publication number: 20120196067Abstract: A cured fluoroelastomer hot air hose comprises A) fluoroelastomer having at least 53 wt. % fluorine, and B) 10 to 30 parts by weight, per hundred parts by weight fluoroelastomer, of carbon black a nitrogen adsorption specific surface area of 70-150 m2/g and a dibutyl phthalate absorption of 90-180 ml/100 g.Type: ApplicationFiled: August 4, 2011Publication date: August 2, 2012Applicant: E.I. DU PONT DE NEMOURS AND COMPANYInventors: Tsuyoshi Kawai, Makio Mori, Shuichi Okutsu
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Patent number: 7964001Abstract: Disclosed herein is a fuel management system having at least one fluororubber article in contact with biodiesel fuel wherein said fluororubber article comprises i) a polyhydroxy cured fluoroelastomer comprising copolymerized units of vinylidene fluoride and at least one other fluoromonomer, and ii) 1 to 10 parts by weight of a diester of a dicarboxylic acid per hundred parts fluoroelastomer. Also disclosed is a method for reducing volume swell of a polyhydroxy cured fluororubber article in contact with biodiesel fuel wherein 1 to 10 parts by weight of a diester of a dicarboxylic acid is incorporated into said article.Type: GrantFiled: April 14, 2009Date of Patent: June 21, 2011Assignee: DuPont Performance Elastomers L.L.C.Inventors: Shuichi Okutsu, Bunichi Rai
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Publication number: 20100261849Abstract: Disclosed herein is a fuel management system having at least one fluororubber article in contact with biodiesel fuel wherein said fluororubber article comprises i) a polyhydroxy cured fluoroelastomer comprising copolymerized units of vinylidene fluoride and at least one other fluoromonomer, and ii) 1 to 10 parts by weight of a diester of a dicarboxylic acid per hundred parts fluoroelastomer. Also disclosed is a method for reducing volume swell of a polyhydroxy cured fluororubber article in contact with biodiesel fuel wherein 1 to 10 parts by weight of a diester of a dicarboxylic acid is incorporated into said article.Type: ApplicationFiled: April 14, 2009Publication date: October 14, 2010Inventors: Shuichi Okutsu, Bunichi Rai