Patents by Inventor Akira Tsukada
Akira Tsukada 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: 10340579Abstract: An attachment instrument for an electronic device (10) includes a first angle adjustment part (30) configured to adjust an orientation of an antenna included in the electronic device (10) by two arc-shaped long holes (31a, 31b) formed in a plane and two axes (32a, 32b) moving inside the two long (31a, 31b), respectively. The first angle adjustment part (30) makes the adjustment by the axis (32a) inside one of the long holes (31a) being fixed and the axis (32b) inside the other one of the long holes (31b) being allowed to move.Type: GrantFiled: January 6, 2016Date of Patent: July 2, 2019Assignee: NEC CORPORATIONInventor: Akira Tsukada
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Patent number: 10266628Abstract: A nitrile copolymer rubber composition including a nitrile copolymer rubber (A) containing 35 to 80 wt % of ?,?-ethylenically unsaturated nitrile monomer units (a1), 19.5 to 64.5 wt % of conjugated diene monomer units (a2), and 0.5 to 20 wt % of ?,?-ethylenically unsaturated carboxylic acid monomer units (a3) and an inorganic filler (B) with an aspect ratio of 30 to 2,000, wherein a content of the inorganic filler (B) with respect to 100 parts by weight of the nitrile copolymer rubber (A) is 1 to 200 parts by weight is provided.Type: GrantFiled: March 24, 2015Date of Patent: April 23, 2019Assignee: ZEON CORPORATIONInventors: Akira Tsukada, Tadashi Nakamura
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Patent number: 10005895Abstract: A cross-linked rubber product for a fuel seal is obtained by cross-linking a nitrile rubber composition including a nitrile rubber (A) containing 25 to 80% by weight of ?,?-ethylenically unsaturated nitrile monomer units (a1), 20 to 75% by weight of conjugated diene monomer units (a2), and 0 to 30% by weight of cationic monomer units and/or monomer units capable of forming a cation (a3), and having a compression set ratio of 20% or less after being compressed in an atmosphere of 100° C. for 70 hours, and an inorganic filler (B) having an aspect ratio of 30 to 2,000. The content of the inorganic filler (B) is from 1 to 200 parts by weight with respect to 100 parts by weight of the nitrile rubber (A). The cross-linked rubber product is obtained by subjecting the nitrile rubber composition to secondary vulcanization at 100 to 150° C. for 1 to 24 hours.Type: GrantFiled: February 10, 2016Date of Patent: June 26, 2018Assignee: ZEON CORPORATIONInventor: Akira Tsukada
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Publication number: 20180115047Abstract: An attachment instrument for an electronic device (10) includes a first angle adjustment part (30) configured to adjust an orientation of an antenna included in the electronic device (10) by two arc-shaped long holes (31a, 31b) formed in a plane and two axes (32a, 32b) moving inside the two long (31a, 31b), respectively. The first angle adjustment part (30) makes the adjustment by the axis (32a) inside one of the long holes (31a) being fixed and the axis (32b) inside the other one of the long holes (31b) being allowed to move.Type: ApplicationFiled: January 6, 2016Publication date: April 26, 2018Applicant: NEC CorporationInventor: Akira TSUKADA
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Patent number: 9926445Abstract: A nitrile copolymer rubber composition containing a nitrile copolymer rubber (A) which contains ?,?-ethylenically unsaturated nitrile monomer units (a1) 15 to 80 wt %, conjugated diene monomer units (a2) 20 to 85 wt %, and cationic monomer units and/or monomer units able to form cations (a3) 0 to 30 wt %, and flat cellulose particles (B) with an aspect ratio of 30 to 600, wherein a content of the flat cellulose particles (B) is 1 to 200 parts by weight with respect to 100 parts by weight of the nitrile copolymer rubber (A) is provided.Type: GrantFiled: December 19, 2013Date of Patent: March 27, 2018Assignee: ZEON CORPORATIONInventor: Akira Tsukada
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Publication number: 20180016423Abstract: A cross-linked rubber product for a fuel seal is obtained by cross-linking a nitrile rubber composition including a nitrile rubber (A) containing 25 to 80% by weight of ?,?-ethylenically unsaturated nitrile monomer units (a1), 20 to 75% by weight of conjugated diene monomer units (a2), and 0 to 30% by weight of cationic monomer units and/or monomer units capable of forming a cation (a3), and having a compression set ratio of 20% or less after being compressed in an atmosphere of 100° C. for 70 hours, and an inorganic filler (B) having an aspect ratio of 30 to 2,000. The content of the inorganic filler (B) is from 1 to 200 parts by weight with respect to 100 parts by weight of the nitrile rubber (A). The cross-linked rubber product is obtained by subjecting the nitrile rubber composition to secondary vulcanization at 100 to 150° C. for 1 to 24 hours.Type: ApplicationFiled: February 10, 2016Publication date: January 18, 2018Applicant: ZEON CORPORATIONInventor: Akira TSUKADA
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Publication number: 20170101498Abstract: A nitrile copolymer rubber composition including a nitrile copolymer rubber (A) containing 35 to 80 wt % of ?,?-ethylenically unsaturated nitrile monomer units (a1), 19.5 to 64.5 wt % of conjugated diene monomer units (a2), and 0.5 to 20 wt % of ?,?-ethylenically unsaturated carboxylic acid monomer units (a3) and an inorganic filler (B) with an aspect ratio of 30 to 2,000, wherein a content of the inorganic filler (B) with respect to 100 parts by weight of the nitrile copolymer rubber (A) is 1 to 200 parts by weight is provided.Type: ApplicationFiled: March 24, 2015Publication date: April 13, 2017Applicant: ZEON CORPORATIONInventors: Akira TSUKADA, Tadashi NAKAMURA
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Publication number: 20150322254Abstract: A nitrile copolymer rubber composition containing a nitrile copolymer rubber (A) which contains ?,?-ethylenically unsaturated nitrile monomer units (a1) 15 to 80 wt %, conjugated diene monomer units (a2) 20 to 85 wt %, and cationic monomer units and/or monomer units able to form cations (a3) 0 to 30 wt %, and flat cellulose particles (B) with an aspect ratio of 30 to 600, wherein a content of the flat cellulose particles (B) is 1 to 200 parts by weight with respect to 100 parts by weight of the nitrile copolymer rubber (A) is provided.Type: ApplicationFiled: December 19, 2013Publication date: November 12, 2015Inventor: Akira TSUKADA
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Publication number: 20150099841Abstract: A method of production of a nitrile copolymer rubber composition which contains a nitrile copolymer rubber, layered inorganic filler, vinyl chloride resin, and plasticizer including the steps of adding, to an aqueous dispersion of a vinyl chloride resin, 10 to 100 wt % of the total amount of plasticizer which is used and 0 to 100 wt % of the total amount of layered inorganic filler which is used to prepare an aqueous dispersion of a vinyl chloride resin which contains a plasticizer (A) and mixing an aqueous dispersion of a nitrile copolymer rubber (B) which may contain a plasticizer and/or layered inorganic filler and the aqueous dispersion of a vinyl chloride resin (A), then causing them to coagulate to form crumbs and filtering and drying the same is provided.Type: ApplicationFiled: March 7, 2013Publication date: April 9, 2015Inventors: Akira Tsukada, Tomoyuki Shibuya, Yoshihisa Takeyama, Tadashi Nakamura
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Patent number: 8927640Abstract: A nitrile copolymer latex composition containing a latex of a nitrile copolymer rubber (A) having ?,?-ethylenically unsaturated nitrile monomer units in 10 to 75 wt %, conjugated diene monomer units in 5 to 89.9 wt %, and cationic monomer units and/or monomer units able to form cations in 0.1 to 20 wt %, an inorganic filler (B) having an aspect ratio of 30 to 2,000, and a plasticizer (C) having an SP value by the HOY method of 8 to 10.2 (cal/cm3)1/2, wherein a content of said plasticizer (C) is 0.1 to 200 parts by weight with respect to said nitrile copolymer rubber (A) as 100 parts by weight is provided.Type: GrantFiled: December 12, 2013Date of Patent: January 6, 2015Assignee: Zeon CorporationInventors: Akira Tsukada, Kazuhiro Ejiri, Chikara Katano
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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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Publication number: 20140220279Abstract: A nitrile copolymer rubber composition containing a nitrile copolymer rubber (A) which contains ?,?-ethylenically unsaturated nitrile monomer units (a1) 35 to 85 wt %, conjugated diene monomer units which may be at least partially hydrogenated (a2) 15 to 65 wt %, cationic monomer units (a3) 0 to 30 wt %, and aromatic vinyl monomer units (a4) 0 to 50 wt %, the total content of the ?,?-ethylenically unsaturated nitrile monomer units (a1) and the aromatic vinyl monomer units (a4) being 35 to 85 wt %, a vinyl chloride resin (B), and a plasticizer (C) with a specific structure is provided.Type: ApplicationFiled: September 21, 2012Publication date: August 7, 2014Inventors: Akira Tsukada, Yoshihisa Takeyama
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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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Publication number: 20140100315Abstract: A nitrile copolymer latex composition containing a latex of a nitrile copolymer rubber (A) having ?,?-ethylenically unsaturated nitrile monomer units in 10 to 75 wt %, conjugated diene monomer units in 5 to 89.9 wt %, and cationic monomer units and/or monomer units able to form cations in 0.1 to 20 wt %, an inorganic filler (B) having an aspect ratio of 30 to 2,000, and a plasticizer (C) having an SP value by the HOY method of 8 to 10.2 (cal/cm3)1/2, wherein a content of said plasticizer (C) is 0.1 to 200 parts by weight with respect to said nitrile copolymer rubber (A) as 100 parts by weight is provided.Type: ApplicationFiled: December 12, 2013Publication date: April 10, 2014Applicant: ZEON CORPORATIONInventors: Akira TSUKADA, Kazuhiro EJIRI, Chikara KATANO
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Patent number: 8648137Abstract: A nitrile copolymer latex composition containing a latex of a nitrile copolymer rubber (A) having ?,?-ethylenically unsaturated nitrile monomer units in 10 to 75 wt %, conjugated diene monomer units in 5 to 89.9 wt %, and cationic monomer units and/or monomer units able to form cations in 0.1 to 20 wt %, an inorganic filler (B) having an aspect ratio of 30 to 2,000, and a plasticizer (C) having an SP value by the HOY method of 8 to 10.2 (cal/cm3)1/2, wherein a content of said plasticizer (C) is 0.1 to 200 parts by weight with respect to said nitrile copolymer rubber (A) as 100 parts by weight is provided.Type: GrantFiled: January 29, 2009Date of Patent: February 11, 2014Assignee: Zeon CorporationInventors: Akira Tsukada, Kazuhiro Ejiri, Chikara Katano
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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: 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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Publication number: 20100330319Abstract: A nitrile copolymer latex composition containing a latex of a nitrile copolymer rubber (A) having ?,?-ethylenically unsaturated nitrile monomer units in 10 to 75 wt %, conjugated diene monomer units in 5 to 89.9 wt %, and cationic monomer units and/or monomer units able to form cations in 0.1 to 20 wt %, an inorganic filler (B) having an aspect ratio of 30 to 2,000, and a plasticizer (C) having an SP value by the HOY method of 8 to 10.2 (cal/cm3)1/2, wherein a content of said plasticizer (C) is 0.1 to 200 parts by weight with respect to said nitrile copolymer rubber (A) as 100 parts by weight is provided.Type: ApplicationFiled: January 29, 2009Publication date: December 30, 2010Inventors: Akira Tsukada, Kazuhiro Ejiri, Chikara Katano