Patents by Inventor Akio Tanna

Akio Tanna 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).

  • Patent number: 11149099
    Abstract: Provided are a novel catalyst component for producing an ?-olefin (co)polymer, and a production method using the same. A metal complex is obtainable by contacting a compound represented by the general formula [I] or [II] with a transition metal compound containing a transition metal belonging to 9th to 11th group: wherein R1, R2, R3 and R4 represent (i) hydrogen, (ii) a halogen, (iii) a linear alkyl or the like, or (iv) OR9 or the like; R5 and R6 represent a linear alkyl group or the like; any one of R1-R6 may have a heteroatom or a heteroatom containing group; E1 represents phosphorus, arsenic or antimony; X1 represents oxygen or sulfur; Z represents hydrogen or a leaving group.
    Type: Grant
    Filed: July 26, 2017
    Date of Patent: October 19, 2021
    Assignees: THE UNIVERSITY OF TOKYO, JAPAN POLYCHEM CORPORATION
    Inventors: Kyoko Nozaki, Shingo Ito, Wen-Jie Tao, Yohei Konishi, Hisashi Ohtaki, Yasuo Oishi, Akio Tanna, Takao Tayano
  • Patent number: 11117984
    Abstract: Provided are a novel catalyst component for producing an ?-olefin (co)polymer, and a production method using the same. A metal complex is obtainable by contacting a compound represented by the general formula [I] or [II] with a transition metal compound containing a transition metal belonging to 9th to 11th group: wherein R1, R2, R3 and R4 represent (i) hydrogen, (ii) a halogen, (iii) a linear alkyl or the like, or (iv) OR9 or the like; R5 and R6 represent a linear alkyl group or the like; any one of R1-R6 may have a heteroatom or a heteroatom containing group; E1 represents phosphorus, arsenic or antimony; X1 represents oxygen or sulfur; Z represents hydrogen or a leaving group.
    Type: Grant
    Filed: July 26, 2017
    Date of Patent: September 14, 2021
    Assignees: THE UNIVERSITY OF TOKYO, JAPAN POLYCHEM CORPORATION
    Inventors: Kyoko Nozaki, Shingo Ito, Wen-Jie Tao, Yohei Konishi, Hisashi Ohtaki, Yasuo Oishi, Akio Tanna, Takao Tayano
  • Patent number: 10550211
    Abstract: Provided is a process of effectively producing an ethylene/unsaturated carboxylic acid copolymer having excellent mechanical and thermal properties. A process for producing an ethylene/unsaturated carboxylic acid copolymer comprises: producing an ethylene/unsaturated carboxylic acid ester copolymer from ethylene and unsaturated carboxylic acid ester using a late-transition-metal complex catalyst; and heating the ethylene/unsaturated carboxylic acid ester copolymer at a temperature capable of converting the ester group into a carboxylic acid group, thereby converting into the ethylene/unsaturated carboxylic acid copolymer.
    Type: Grant
    Filed: January 11, 2018
    Date of Patent: February 4, 2020
    Assignees: JAPAN POLYETHYLENE CORPORATION, JAPAN POLYPROPYLENE CORPORATION
    Inventors: Naomasa Sato, Fumihiko Shimizu, Akio Tanna, Toshiaki Egashira
  • Patent number: 10526427
    Abstract: A method for producing a solid catalyst component (Aa) for ?-olefin polymerization, which includes: bringing components (A1) to (A4) into contact with one another in an inert solvent; and without washing the contact product with an inert solvent, aging the contact product by keeping for a holding time of 3 days or more and 180 days or less, regarding the time point that all of the components (A1) to (A4) first come into contact, as a starting point.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: January 7, 2020
    Assignee: Japan Polypropylene Corporation
    Inventors: Keiji Fukuda, Shouichi Ida, Akio Tanna, Shigeo Mizukami
  • Publication number: 20190263945
    Abstract: Provided are a novel catalyst component for producing an ?-olefin (co)polymer, and a production method using the same. A metal complex is obtainable by contacting a compound represented by the general formula [I] or [II] with a transition metal compound containing a transition metal belonging to 9th to 11th group: wherein R1, R2, R3 and R4 represent (i) hydrogen, (ii) a halogen, (iii) a linear alkyl or the like, or (iv) OR9 or the like; R5 and R6 represent a linear alkyl group or the like; any one of R1-R6 may have a heteroatom or a heteroatom containing group; E1 represents phosphorus, arsenic or antimony; X1 represents oxygen or sulfur; Z represents hydrogen or a leaving group.
    Type: Application
    Filed: July 26, 2017
    Publication date: August 29, 2019
    Applicants: THE UNIVERSITY OF TOKYO, JAPAN POLYCHEM CORPORATION
    Inventors: Kyoko NOZAKI, Shingo ITO, Wen-Jie TAO, Yohei KONISHI, Hisashi OHTAKI, Yasuo OHISHI, Akio TANNA, Takao TAYANO
  • Patent number: 10301401
    Abstract: An object of the present invention is to provide a novel catalyst for olefin (co)polymer production, which has high activity without using a large amount of a cocatalyst and is aimed for obtaining a particulate olefin (co)polymer. The invention relates to an olefin polymerization catalyst which comprises: a solid carrier (1) that has been brought into contact with a specific compound; and a metal catalyst component (2) that contains a transition metal compound (C) containing a transition metal M belonging to Group 9, 10, or 11 of the periodic table and has a reactive group Ra.
    Type: Grant
    Filed: July 23, 2015
    Date of Patent: May 28, 2019
    Assignees: JAPAN POLYETHYLENE CORPORATION, JAPAN POLYPROPYLENE CORPORATION
    Inventors: Yohei Konishi, Yasuo Maruyama, Naomasa Sato, Akio Tanna
  • Patent number: 10259891
    Abstract: An object of the present invention is to provide a novel catalyst for olefin (co)polymer production, which has high activity without using a large amount of a cocatalyst and is aimed for obtaining a particulate olefin (co)polymer. The invention relates to an olefin polymerization catalyst which comprises: a solid carrier (1) that has been brought into contact with a specific compound; and a metal catalyst component (2) that contains a transition metal compound (C) containing a transition metal M belonging to Group 9, 10, or 11 of the periodic table and has a reactive group Ra.
    Type: Grant
    Filed: July 23, 2015
    Date of Patent: April 16, 2019
    Assignees: JAPAN POLYETHYLENE CORPORATION, JAPAN POLYPROPYLENE CORPORATION
    Inventors: Yohei Konishi, Yasuo Maruyama, Naomasa Sato, Akio Tanna
  • Publication number: 20180362673
    Abstract: A method for producing a solid catalyst component (Aa) for ?-olefin polymerization, which includes: bringing components (A1) to (A4) into contact with one another in an inert solvent; and without washing the contact product with an inert solvent, aging the contact product by keeping for a holding time of 3 days or more and 180 days or less, regarding the time point that all of the components (A1) to (A4) first come into contact, as a starting point.
    Type: Application
    Filed: December 16, 2016
    Publication date: December 20, 2018
    Applicant: Japan Polypropylene Corporation
    Inventors: Keiji FUKUDA, Shouichi IDA, Akio TANNA, Shigeo MIZUKAMI
  • Publication number: 20180201704
    Abstract: Provided is a process of effectively producing an ethylene/unsaturated carboxylic acid copolymer having excellent mechanical and thermal properties. A process for producing an ethylene/unsaturated carboxylic acid copolymer comprises: producing an ethylene/unsaturated carboxylic acid ester copolymer from ethylene and unsaturated carboxylic acid ester using a late-transition-metal complex catalyst; and heating the ethylene/unsaturated carboxylic acid ester copolymer at a temperature capable of converting the ester group into a carboxylic acid group, thereby converting into the ethylene/unsaturated carboxylic acid copolymer.
    Type: Application
    Filed: January 11, 2018
    Publication date: July 19, 2018
    Applicants: JAPAN POLYETHYLENE CORPORATION, JAPAN POLYPROPYLENE CORPORATION
    Inventors: Naomasa SATO, Fumihiko SHIMIZU, Akio TANNA, Toshiaki EGASHIRA
  • Patent number: 9862783
    Abstract: A compound represented by the following general formula (1):
    Type: Grant
    Filed: September 26, 2014
    Date of Patent: January 9, 2018
    Assignees: JAPAN POLYPROPYLENE CORPORATION, JAPAN POLYETHYLENE CORPORATION
    Inventors: Akio Tanna, Naomasa Sato, Yohei Konishi, Yasuo Oishi
  • Publication number: 20170210830
    Abstract: An object of the present invention is to provide a novel catalyst for olefin (co)polymer production, which has high activity without using a large amount of a cocatalyst and is aimed for obtaining a particulate olefin (co)polymer. The invention relates to an olefin polymerization catalyst which comprises: a solid carrier (1) that has been brought into contact with a specific compound; and a metal catalyst component (2) that contains a transition metal compound (C) containing a transition metal M belonging to Group 9, 10, or 11 of the periodic table and has a reactive group Ra.
    Type: Application
    Filed: July 23, 2015
    Publication date: July 27, 2017
    Applicants: JAPAN POLYETHYLENE CORPORATION, JAPAN POLYPROPYLENE CORPORATION
    Inventors: Yohei KONISHI, Yasuo MARUYAMA, Naomasa SATO, Akio TANNA
  • Publication number: 20170002120
    Abstract: Provided is a process of effectively producing an ethylene/unsaturated carboxylic acid copolymer having excellent mechanical and thermal properties. A process for producing an ethylene/unsaturated carboxylic acid copolymer comprises: producing an ethylene/unsaturated carboxylic acid ester copolymer from ethylene and unsaturated carboxylic acid ester using a late-transition-metal complex catalyst; and heating the ethylene/unsaturated carboxylic acid ester copolymer at a temperature capable of converting the ester group into a carboxylic acid group, thereby converting into the ethylene/unsaturated carboxylic acid copolymer.
    Type: Application
    Filed: January 26, 2015
    Publication date: January 5, 2017
    Applicants: JAPAN POLYETHYLENE CORPORATION, JAPAN POLYPROPYLENE CORPORATION
    Inventors: Naomasa SATO, Fumihiko SHIMIZU, Akio TANNA, Toshiaki EGASHIRA
  • Publication number: 20160237184
    Abstract: A compound represented by the following general formula (1):
    Type: Application
    Filed: September 26, 2014
    Publication date: August 18, 2016
    Applicants: JAPAN POLYPROPYLENE CORPORATION, JAPAN POLYETHYLENE CORPORATION
    Inventors: Akio TANNA, Naomasa SATO, Yohei KONISHI, Yasuo OISHI
  • Patent number: 8618319
    Abstract: A novel catalyst component for producing a crystalline ?-olefin polymer or ?-olefin/(meth)acrylate copolymer having few branches, especially a polymer having a high molecular weight, and a method for producing an ?-olefin polymer or an ?-olefin/(meth)acrylate copolymer using the catalyst component. A metal complex represented by the following general formula (D), as well as a method for producing an ?-olefin polymer and a method for producing an ?-olefin/(meth)acrylate copolymer using the metal complex.
    Type: Grant
    Filed: April 27, 2009
    Date of Patent: December 31, 2013
    Assignees: Japan Polypropylene Corporation, Japan Polyethylene Corporation
    Inventors: Fumihiko Shimizu, Shixuan Xin, Akio Tanna, Shiho Goromaru, Koushi Matsubara
  • Publication number: 20110213110
    Abstract: A novel catalyst component for producing a crystalline ?-olefin polymer or ?-olefin/(meth)acrylate copolymer having few branches, especially a polymer having a high molecular weight, and a method for producing an ?-olefin polymer or an ?-olefin/(meth)acrylate copolymer using the catalyst component. A metal complex represented by the following general formula (D), as well as a method for producing an ?-olefin polymer and a method for producing an ?-olefin/(meth)acrylate copolymer using the metal complex.
    Type: Application
    Filed: April 27, 2009
    Publication date: September 1, 2011
    Applicants: JAPAN POLYPROPYLENE CORPORATION, JAPAN POLYETHYLENE CORPORATION
    Inventors: Fumihiko Shimizu, Shixuan Xin, Akio Tanna, Shiho Goromaru, Koushi Matsubara
  • Patent number: 7776943
    Abstract: A method for forming a nanocomposite by olefin polymerization in which at least one cation-exchanging layered load material, selected from the group consisting of cation-exchanging, layered inorganic silicates and cation-exchanging, layered compounds other than silicates, is treated with acid to disrupt its layered structure and is combined with a catalyst that becomes activated for olefin polymerization when in contact with the acid-treated filler. An olefin is contacted by the activated catalyst—filler combination either (a) in the absence of an alkylaluminum co-catalyst or (b) with an alkylaluminum co-catalyst when the activatable catalyst is a polyalkylmetal compound, to form a nanocomposite containing polyolefin and the acid-treated filler. In a particular embodiment, sufficient filler is used to constitute at least 30 weight % of the nanocomposite to prepare a highly loaded nanocomposite masterbatch.
    Type: Grant
    Filed: June 12, 2006
    Date of Patent: August 17, 2010
    Assignee: The Regents of the University of California
    Inventors: Susannah Scott, Brian Peoples, Rene' Rojas, Akio Tanna, Fumihiko Shimizu
  • Publication number: 20080275164
    Abstract: A method for forming a nanocomposite by olefin polymerization in which at least one cation-exchanging layered load material, selected from the group consisting of cation-exchanging, layered inorganic silicates and cation-exchanging, layered compounds other than silicates, is treated with acid to disrupt its layered structure and is combined with a catalyst that becomes activated for olefin polymerization when in contact with the acid-treated filler. An olefin is contacted by the activated catalyst-filler combination either (a) in the absence of an alkylaluminum co-catalyst or (b) with an alkylaluminum co-catalyst when the activatable catalyst is a polyalkylmetal compound, to form a nanocomposite containing polyolefin and the acid-treated filler. In a particular embodiment, sufficient filler is used to constitute at least 30 weight % of the nanocomposite to prepare a highly loaded nanocomposite masterbatch.
    Type: Application
    Filed: June 12, 2006
    Publication date: November 6, 2008
    Inventors: Susannah Scott, Brian Peoples, Rene Rojas, Akio Tanna, Fumihiko Shimizu
  • Patent number: 7122604
    Abstract: This invention provides a graft modified polypropylene polymer which does not contain halogens, is excellent in certain properties such as solubility and can add good adhesiveness and coating ability to crystalline propylene polymer base materials, and a composition containing the same; and in particular, it provides a propylene polymer which contains a propylene polymer main chain having a stereo-block structure containing an isotactic block and a side chain containing a carboxylic acid group, an acid anhydride group or a carboxylic acid ester group, wherein when it is dissolved in toluene to a concentration of 10% by weight at 25° C., the insoluble matter is 1% by weight or less based on the total polymer, and a composition containing the same.
    Type: Grant
    Filed: November 12, 2004
    Date of Patent: October 17, 2006
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Masato Onoe, Teruaki Ashihara, Kazuyuki Hata, Fumihiko Shimizu, Naomasa Sato, Akio Tanna
  • Patent number: 7115694
    Abstract: An object of the present invention is to provide a novel propylene-based polymer capable of providing a propylene-based polymer with a good adhesion and coatability. The present invention lies in a propylene-based polymer having a propylene component with several characteristics including a weight-average molecular weight Mw from not smaller than 5,000 to less than 1,000,000 as measured by GPC, and Regio irregular units based on 2,1-inserted propylene monomer and/or 1,3-inserted propylene monomer present in its main chain and the sum of the ratio of regio irregular units based on 2,1-insertion and 1,3-insertion to all propylene insertions not smaller than 0.05%.
    Type: Grant
    Filed: August 29, 2003
    Date of Patent: October 3, 2006
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Fumihiko Shimizu, Naomasa Sato, Akira Kuwahara, Fumiyoshi Yamada, Akio Tanna
  • Patent number: 6887943
    Abstract: This invention provides a graft modified polypropylene polymer which does not contain halogens, is excellent in certain properties such as solubility and can add good adhesiveness and coating ability to crystalline propylene polymer base materials, and a composition containing the same; and in particular, it provides a propylene polymer which contains a propylene polymer main chain having a stereo-block structure containing an isotactic block and a side chain containing a carboxylic acid group, an acid anhydride group or a carboxylic acid ester group, wherein when it is dissolved in toluene to a concentration of 10% by weight at 25° C., the insoluble matter is 1% by weight or less based on the total polymer, and a composition containing the same.
    Type: Grant
    Filed: October 31, 2002
    Date of Patent: May 3, 2005
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Masato Onoe, Teruaki Ashihara, Kazuyuki Hata, Fumihiko Shimizu, Naomasa Sato, Akio Tanna