Patents by Inventor Chikara Katano
Chikara Katano 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: 10988609Abstract: A nitrile group-containing highly saturated copolymer rubber composition containing a nitrile group-containing highly saturated copolymer rubber (A) having a Mooney viscosity [ML1+4, 100° C.] of 50 to 200, a nitrile group-containing highly saturated copolymer rubber (B) having a Mooney viscosity [ML1+4, 100° C.] of 5 to 45, and staple fibers (C) having an average fiber length of 0.1 to 12 mm is provided. According to the present invention, a nitrile group-containing highly saturated copolymer rubber composition which can give cross-linked rubber which is extremely high in tensile stress and is excellent in low heat buildup property and has good workability can be provided.Type: GrantFiled: May 6, 2019Date of Patent: April 27, 2021Assignee: ZEON CORPORATIONInventors: Tomonori Nakashima, Chikara Katano, Masato Sakamoto
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Patent number: 10968287Abstract: A method for producing a hydrogenated conjugated diene polymer latex includes: a hydrogenation step of dissolving or dispersing a hydrogenation catalyst containing a platinum group element in a latex of a conjugated diene polymer to hydrogenate a carbon-carbon unsaturated bond in the polymer; an insoluble complex formation step of complexing the platinum group element with a complexing agent to form an insoluble complex; and an insoluble complex removing step of continuously feeding the latex which has undergone the insoluble complex formation step to a centrifuge machine and continuously performing a centrifugation operation to continuously remove the insoluble complex from the latex and continuously discharge the insoluble complex out of the centrifuge machine. In the insoluble complex removal step the feed rate of the latex to the centrifuge machine is adjusted to 0.5 to 15 m3/hour, and the centrifugal force in the centrifugation operation is adjusted to 200 to 10,000 G.Type: GrantFiled: January 18, 2018Date of Patent: April 6, 2021Assignee: ZEON CORPORATIONInventors: Kentaro Ono, Chikara Katano, Yasuaki Watanabe
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Publication number: 20200048375Abstract: A method for producing a hydrogenated conjugated diene polymer latex includes: a hydrogenation step of dissolving or dispersing a hydrogenation catalyst containing a platinum group element in a latex of a conjugated diene polymer to hydrogenate a carbon-carbon unsaturated bond in the polymer; an insoluble complex formation step of complexing the platinum group element with a complexing agent to form an insoluble complex; and an insoluble complex removing step of continuously feeding the latex which has undergone the insoluble complex formation step to a centrifuge machine and continuously performing a centrifugation operation to continuously remove the insoluble complex from the latex and continuously discharge the insoluble complex out of the centrifuge machine. In the insoluble complex removal step the feed rate of the latex to the centrifuge machine is adjusted to 0.5 to 15 m3/hour, and the centrifugal force in the centrifugation operation is adjusted to 200 to 10,000 G.Type: ApplicationFiled: January 18, 2018Publication date: February 13, 2020Applicant: ZEON CORPORATIONInventors: Kentaro ONO, Chikara KATANO, Yasuaki WATANABE
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Publication number: 20190284386Abstract: A nitrile group-containing highly saturated copolymer rubber composition containing a nitrile group-containing highly saturated copolymer rubber (A) having a Mooney viscosity [ML1+4, 100° C.] of 50 to 200, a nitrile group-containing highly saturated copolymer rubber (B) having a Mooney viscosity [ML1+4, 100° C.] of 5 to 45, and staple fibers (C) having an average fiber length of 0.1 to 12 mm is provided. According to the present invention, a nitrile group-containing highly saturated copolymer rubber composition which can give cross-linked rubber which is extremely high in tensile stress and is excellent in low heat buildup property and has good workability can be provided.Type: ApplicationFiled: May 6, 2019Publication date: September 19, 2019Applicant: ZEON CORPORATIONInventors: Tomonori NAKASHIMA, Chikara KATANO, Masato SAKAMOTO
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Patent number: 10280244Abstract: A nitrile group-containing copolymer rubber containing ?,?-ethylenically unsaturated nitrile monomer units in 10 to 60 wt % and having a weight average radius of gyration of 10 to 100 nm in range is provided. According to the present invention, a nitrile group-containing copolymer rubber excellent in processability and able to give cross-linked rubber excellent in normal physical properties can be provided.Type: GrantFiled: March 25, 2015Date of Patent: May 7, 2019Assignee: ZEON CORPORATIONInventors: Sayaka Inoue, Chikara Katano
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Publication number: 20170240712Abstract: A cross-linkable nitrile rubber composition including a nitrile rubber (a) containing 0.1 to 15 wt % of ?,?-ethylenically unsaturated nitrile monomer units, 1 to 10 wt % of ?,?-ethylenically unsaturated dicarboxylic acid monoester monomer units, 40 to 75 wt % of ?,?-ethylenically unsaturated monocarboxylic acid ester monomer units, and 20 to 58.9 wt % of diene monomer units and/or ?-olefin monomer units, and a polyamine-based cross-linking agent (b), wherein a ratio of content of the polyamine-based cross-linking agent (b) with respect to 100 parts by weight of the nitrile rubber (a) is 0.1 to 20 parts by weight is provided.Type: ApplicationFiled: August 5, 2015Publication date: August 24, 2017Applicant: ZEON CORPORATIONInventors: Shinsuke SUGAWARA, Chikara KATANO
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Publication number: 20170015773Abstract: A nitrile group-containing copolymer rubber containing ?-ethylenically unsaturated nitrile monomer units in 10 to 60 wt % and having a weight average radius of gyration of 10 to 100 nm in range is provided. According to the present invention, a nitrile group-containing copolymer rubber excellent in processability and able to give cross-linked rubber excellent in normal physical properties can be provided.Type: ApplicationFiled: March 25, 2015Publication date: January 19, 2017Applicant: ZEON CORPORATIONInventors: Sayaka INOUE, Chikara KATANO
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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: 20140206250Abstract: An adhesive composition containing a latex of highly saturated nitrile rubber (A) which has ?,?-ethylenically unsaturated nitrile monomer units 10 to 55 wt %, conjugated diene monomer units 25 to 89 wt %, and ?,?-ethylenically unsaturated dicarboxylic acid monoester monomer units 1 to 20 wt % and has an iodine value of 120 or less and a curing agent (B) is provided.Type: ApplicationFiled: August 29, 2012Publication date: July 24, 2014Applicant: ZEON CORPORATIONInventors: Tomonori Nakashima, Chikara Katano, Masato Sakamoto
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Publication number: 20140163170Abstract: A nitrile group-containing highly saturated copolymer rubber composition containing a nitrile group-containing highly saturated copolymer rubber (A) having a Mooney viscosity [ML1+4, 100° C.] of 50 to 200, a nitrile group-containing highly saturated copolymer rubber (B) having a Mooney viscosity [ML1+4, 100° C.] of 5 to 45, and staple fibers (C) having an average fiber length of 0.1 to 12 mm is provided. According to the present invention, a nitrile group-containing highly saturated copolymer rubber composition which can give cross-linked rubber which is extremely high in tensile stress and is excellent in low heat buildup property and has good workability can be provided.Type: ApplicationFiled: July 26, 2012Publication date: June 12, 2014Applicant: ZEON CORPORATIONInventors: Tomonori Nakashima, Chikara Katano, Masato Sakamoto
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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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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