Patents by Inventor Hiroyasu Nagamori
Hiroyasu Nagamori 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: 10793704Abstract: A nitrile copolymer rubber composition has a nitrile copolymer rubber (A) containing 22 to 45 wt % of ?,?-ethylenically unsaturated nitrile monomer units and a vinyl chloride resin (B) having an average polymerization degree of 1200 to 2200, wherein a ratio of content of the vinyl chloride resin (B) with respect to 100 parts by weight of the nitrile copolymer rubber (A) is 70 to 140 parts by weight.Type: GrantFiled: February 21, 2017Date of Patent: October 6, 2020Assignee: ZEON CORPORATIONInventors: Seiji Yokoyama, Hiroyasu Nagamori
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Patent number: 10414908Abstract: A dip-molding composition of the present invention contains a latex (A) of a nitrile-group-containing highly saturated copolymer rubber (a). The nitrile-group-containing highly saturated copolymer rubber (a) contains an ?,?-ethylenically unsaturated nitrile monomer unit and a conjugated diene monomer unit, and being obtained by hydrogenating at least part of the conjugated diene monomer unit. A dip-molded article of the present invention is produced by dip molding of the above dip-molding composition.Type: GrantFiled: March 24, 2015Date of Patent: September 17, 2019Assignee: ZEON CORPORATIONInventors: Tomonori Nakashima, Hiroyasu Nagamori, Sayaka Inoue
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Publication number: 20190040237Abstract: A nitrile copolymer rubber composition has a nitrile copolymer rubber (A) containing 22 to 45 wt % of ?,?-ethylenically unsaturated nitrile monomer units and a vinyl chloride resin (B) having an average polymerization degree of 1200 to 2200, wherein a ratio of content of the vinyl chloride resin (B) with respect to 100 parts by weight of the nitrile copolymer rubber (A) is 70 to 140 parts by weight.Type: ApplicationFiled: February 21, 2017Publication date: February 7, 2019Applicant: ZEON CORPORATIONInventors: Seiji YOKOYAMA, Hiroyasu NAGAMORI
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Publication number: 20170088700Abstract: A dip-molding composition of the present invention contains a latex (A) of a nitrile-group-containing highly saturated copolymer rubber (a). The nitrile-group-containing highly saturated copolymer rubber (a) contains an ?,?-ethylenically unsaturated nitrile monomer unit and a conjugated diene monomer unit, and being obtained by hydrogenating at least part of the conjugated diene monomer unit.Type: ApplicationFiled: March 24, 2015Publication date: March 30, 2017Applicant: ZEON CORPORATIONInventors: Tomonori NAKASHIMA, Hiroyasu NAGAMORI, Sayaka INOUE
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Patent number: 9163132Abstract: Disclosed herein are a nitrile rubber composition comprising a nitrile rubber (a) including an ?,?-ethylenically unsaturated nitrile monomer unit and having iodine value of 100 or less, an ?,?-ethylenically unsaturated carboxylic acid metallic salt (b), and silane-treated fumed silica and/or calcinated wet silica (c); a cross-linkable nitrile rubber composition comprising the above nitrile rubber composition and a crosslinking agent (d); and a cross-linked rubber obtained by crosslinking the cross-linkable nitrile rubber composition. The present invention can provide a nitrile rubber composition and a cross-linkable nitrile rubber composition, capable of giving a highly-saturated cross-linked nitrile rubber having high tensile stress and excellent heat resistance, and a cross-linked rubber thereof.Type: GrantFiled: October 26, 2011Date of Patent: October 20, 2015Assignee: ZEON CORPORATIONInventors: Hiroyasu Nagamori, Kiyonori Umetsu
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Publication number: 20140296404Abstract: A crosslinkable rubber composition comprising 0.2 to 10 parts by weight of an aromatic secondary amine-based anti-aging agent and 0.5 to 20 parts by weight of a polyamine-based crosslinking agent with respect to 100 parts by weight of a nitrile rubber including an ?,?-ethylenically unsaturated nitrile unit and an ?,?-ethylenically unsaturated dicarboxylic acid monoester unit, and with iodine value of 120 or less. The present invention can provide a crosslinkable rubber composition, providable of a cross-linked rubber excellent in a variety of properties such as mechanical strength and small in compression set, and a cross-linked rubber obtained by cross-linking the rubber composition.Type: ApplicationFiled: June 17, 2014Publication date: October 2, 2014Inventors: Hiroyasu NAGAMORI, Shigeru FUJITA, Kiyonori UMETSU, SR., Akira TSUKADA
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Patent number: 8785530Abstract: A crosslinkable rubber composition comprising 0.2 to 10 parts by weight of an aromatic secondary amine-based anti-aging agent and 0.5 to 20 parts by weight of a polyamine-based crosslinking agent with respect to 100 parts by weight of a nitrile rubber including an ?,?-ethylenically unsaturated nitrile unit and an ?,?-ethylenically unsaturated dicarboxylic acid monoester unit, and with iodine value of 120 or less. The present invention can provide a crosslinkable rubber composition, providable of a cross-linked rubber excellent in a variety of properties such as mechanical strength and small in compression set, and a cross-linked rubber obtained by cross-linking the rubber composition.Type: GrantFiled: December 14, 2012Date of Patent: July 22, 2014Assignee: Zeon CorporationInventors: Hiroyasu Nagamori, Shigeru Fujita, Kiyonori Umetsu, Akira Tsukada
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Patent number: 8742006Abstract: A cross-linkable nitrile rubber composition comprising a nitrile rubber (A1) including an ?,?-ethylenically unsaturated nitrile monomer unit and having iodine value of 120 or less, silica (B1) having CaO value determined by X-ray fluorescence composition analysis of 0.5 wt % or more, and a crosslinking agent (C1). According to the present invention, a cross-linkable nitrile rubber composition, capable of giving a highly-saturated cross-linked nitrile rubber having excellent mechanical properties such as elongation and small compression set, and excellent in workability, and a cross-linked rubber obtained by crosslinking the rubber composition can be provided.Type: GrantFiled: April 16, 2007Date of Patent: June 3, 2014Assignee: Zeon CorporationInventors: Hiroyasu Nagamori, Shigeru Fujita
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Patent number: 8404767Abstract: A nitrile group-containing highly saturated copolymer rubber having an iodine value of 80 or less and containing a caprate in 0.01 to 0.4 wt %. Preferably, the caprate is an alkaline earth metal caprate or Group XIII metal caprate. According to present invention, it is possible to provide a nitrile group-containing highly saturated copolymer rubber improved in mold fouling resistance while maintaining good normal state physical properties and heat resistance when being made into a cross-linked product.Type: GrantFiled: December 26, 2008Date of Patent: March 26, 2013Assignee: Zeon CorporationInventors: Daizo Hosotani, Hiroyasu Nagamori, Shinya Ikeda
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Patent number: 8362121Abstract: A crosslinkable rubber composition comprising 0.2 to 10 parts by weight of an aromatic secondary amine-based anti-aging agent and 0.5 to 20 parts by weight of a polyamine-based crosslinking agent with respect to 100 parts by weight of a nitrile rubber including an ?,?-ethylenically unsaturated nitrile unit and an ?,?-ethylenically unsaturated dicarboxylic acid monoester unit, and with iodine value of 120 or less. The present invention can provide a crosslinkable rubber composition, providable of a cross-linked rubber excellent in a variety of properties such as mechanical strength and small in compression set, and a cross-linked rubber obtained by cross-linking the rubber composition.Type: GrantFiled: March 5, 2012Date of Patent: January 29, 2013Assignee: Zeon CorporationInventors: Hiroyasu Nagamori, Shigeru Fujita, Kiyonori Umetsu, Akira Tsukada
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Publication number: 20120172509Abstract: A crosslinkable rubber composition comprising 0.2 to 10 parts by weight of an aromatic secondary amine-based anti-aging agent and 0.5 to 20 parts by weight of a polyamine-based crosslinking agent with respect to 100 parts by weight of a nitrile rubber including an ?,?-ethylenically unsaturated nitrile unit and an ?,?-ethylenically unsaturated dicarboxylic acid monoester unit, and with iodine value of 120 or less. The present invention can provide a crosslinkable rubber composition, providable of a cross-linked rubber excellent in a variety of properties such as mechanical strength and small in compression set, and a cross-linked rubber obtained by cross-linking the rubber composition.Type: ApplicationFiled: March 5, 2012Publication date: July 5, 2012Inventors: Hiroyasu NAGAMORI, Schigeru Fujita, Kiyonori Umetsu, Akira Tsukada
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Patent number: 8153712Abstract: A crosslinkable rubber composition comprising 0.2 to 10 parts by weight of an aromatic secondary amine-based anti-aging agent and 0.5 to 20 parts by weight of a polyamine-based crosslinking agent with respect to 100 parts by weight of a nitrile rubber including an ?,?-ethylenically unsaturated nitrile unit and an ?,?-ethylenically unsaturated dicarboxylic acid monoester unit, and with iodine value of 120 or less. The present invention can provide a crosslinkable rubber composition, providable of a cross-linked rubber excellent in a variety of properties such as mechanical strength and small in compression set, and a cross-linked rubber obtained by cross-linking the rubber composition.Type: GrantFiled: December 21, 2006Date of Patent: April 10, 2012Assignee: Zeon CorporationInventors: Hiroyasu Nagamori, Shigeru Fujita, Kiyonori Umetsu, Akira Tsukada
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Patent number: 8133948Abstract: Disclosed herein are a nitrile rubber composition comprising a nitrile rubber (a) including an ?,?-ethylenically unsaturated nitrile monomer unit and having iodine value of 100 or less, an ?,?-ethylenically unsaturated carboxylic acid metallic salt (b), and silane-treated fumed silica and/or calcinated wet silica (c); a cross-linkable nitrile rubber composition comprising the above nitrile rubber composition and a crosslinking agent (d); and a cross-linked rubber obtained by crosslinking the cross-linkable nitrile rubber composition. The present invention can provide a nitrile rubber composition and a cross-linkable nitrile rubber composition, capable of giving a highly-saturated cross-linked nitrile rubber having high tensile stress and excellent heat resistance, and a cross-linked rubber thereof.Type: GrantFiled: June 22, 2007Date of Patent: March 13, 2012Assignee: Zeon CorporationInventors: Hiroyasu Nagamori, Kiyonori Umetsu
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Publication number: 20120041127Abstract: Disclosed herein are a nitrile rubber composition comprising a nitrile rubber (a) including an ?,?-ethylenically unsaturated nitrile monomer unit and having iodine value of 100 or less, an ?,?-ethylenically unsaturated carboxylic acid metallic salt (b), and silane-treated fumed silica and/or calcinated wet silica (c); a cross-linkable nitrile rubber composition comprising the above nitrile rubber composition and a crosslinking agent (d); and a cross-linked rubber obtained by crosslinking the cross-linkable nitrile rubber composition. The present invention can provide a nitrile rubber composition and a cross-linkable nitrile rubber composition, capable of giving a highly-saturated cross-linked nitrile rubber having high tensile stress and excellent heat resistance, and a cross-linked rubber thereof.Type: ApplicationFiled: October 26, 2011Publication date: February 16, 2012Inventors: Hiroyasu NAGAMORI, Kiyonori Umetsu
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Patent number: 8044147Abstract: A nitrile group-containing copolymer rubber comprising 10 to 40 wt % of ?,?-ethylenically unsaturated nitrile unit (a), 10 to 60 wt % of ?,?-ethylenically unsaturated carboxylic acid ester unit (b), and 20 to 70 wt % in total of conjugated diene unit (c) and saturated conjugated diene unit (d), wherein a content ratio “x” of a conjugated diene unit (c) based on the total content of said conjugated diene unit (c) and said saturated conjugated diene unit (d) is 0.08 or smaller, and “x·A” defined as a product of said ratio “x” and a content ratio “A” (%) of said ?,?-ethylenically unsaturated nitrile unit (a) is 1.5 or smaller. According to the present invention, a nitrile group-containing copolymer rubber capable to provide a rubber vulcanizate highly balanced in mechanical strength, heat aging resistance, oil resistance, cold resistance and ozone resistance, and a vulcanizable rubber composition using the rubber can be provided.Type: GrantFiled: February 22, 2006Date of Patent: October 25, 2011Assignee: Zeon CorporationInventors: Hiroyasu Nagamori, Akira Tsukada, Takafumi Kawanaka
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Patent number: 8034881Abstract: A cross-linkable nitrile rubber composition containing a highly saturated nitrile rubber (a) having an ?,?-ethylenically unsaturated nitrile monomer unit and a carboxyl-group containing monomer unit and having an iodine value of 120 or less, a cross-linking agent (b), and a specific cyclic amidine and/or cyclic amidinium salt (c) is provided. Preferably, the cross-linking agent (b) is a polyamine-based cross-linking agent (d), and more preferably, the carboxyl-group containing monomer unit is an ?,?-ethylenically unsaturated dicarboxylic acid monoester monomer unit.Type: GrantFiled: January 30, 2009Date of Patent: October 11, 2011Assignee: Zeon CorporationInventors: Shinya Ikeda, Hiroyasu Nagamori, Peter J. Abraham
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Publication number: 20100305278Abstract: A nitrile group-containing highly saturated copolymer rubber having an iodine value of 80 or less and containing a caprate in 0.01 to 0.4 wt %. Preferably, the caprate is an alkaline earth metal caprate or Group XIII metal caprate. According to present invention, it is possible to provide a nitrile group-containing highly saturated copolymer rubber improved in mold fouling resistance while maintaining good normal state physical properties and heat resistance when being made into a cross-linked product.Type: ApplicationFiled: December 26, 2008Publication date: December 2, 2010Inventors: Daizo Hosotani, Hiroyasu Nagamori, Shinya Ikeda
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Publication number: 20100256294Abstract: A cross-linkable nitrile rubber composition containing a highly saturated nitrile rubber (a) having an ?,?-ethylenically unsaturated nitrile monomer unit and a carboxyl-group containing monomer unit and having an iodine value of 120 or less, a cross-linking agent (b), and a specific cyclic amidine and/or cyclic amidinium salt (c) is provided. Preferably, the cross-linking agent (b) is a polyamine-based cross-linking agent (d), and more preferably, the carboxyl-group containing monomer unit is an ?,?-ethylenically unsaturated dicarboxylic acid monoester monomer unit.Type: ApplicationFiled: January 30, 2009Publication date: October 7, 2010Inventors: Shinya Ikeda, Hiroyasu Nagamori, Peter J. Abraham
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Publication number: 20100168302Abstract: A crosslinkable rubber composition comprising 0.2 to 10 parts by weight of an aromatic secondary amine-based anti-aging agent and 0.5 to 20 parts by weight of a polyamine-based crosslinking agent with respect to 100 parts by weight of a nitrile rubber including an ?,?-ethylenically unsaturated nitrile unit and an ?,?-ethylenically unsaturated dicarboxylic acid monoester unit, and with iodine value of 120 or less. The present invention can provide a crosslinkable rubber composition, providable of a cross-linked rubber excellent in a variety of properties such as mechanical strength and small in compression set, and a cross-linked rubber obtained by cross-linking the rubber composition.Type: ApplicationFiled: December 21, 2006Publication date: July 1, 2010Inventors: Hiroyasu Nagamori, Shigeru Fujita, Kiyonori Umetsu, Akira Tsukada
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Publication number: 20090234054Abstract: Disclosed herein are a nitrile rubber composition comprising a nitrile rubber (a) including an ?,?-ethylenically unsaturated nitrile monomer unit and having iodine value of 100 or less, an ?,?-ethylenically unsaturated carboxylic acid metallic salt (b), and silane-treated fumed silica and/or calcinated wet silica (c); a cross-linkable nitrile rubber composition comprising the above nitrile rubber composition and a crosslinking agent (d); and a cross-linked rubber obtained by crosslinking the cross-linkable nitrile rubber composition. The present invention can provide a nitrile rubber composition and a cross-linkable nitrile rubber composition, capable of giving a highly-saturated cross-linked nitrile rubber having high tensile stress and excellent heat resistance, and a cross-linked rubber thereof.Type: ApplicationFiled: June 22, 2007Publication date: September 17, 2009Inventors: Hiroyasu Nagamori, Kiyonori Umetsu