Patents by Inventor Koji ITAGAKI

Koji ITAGAKI 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).

  • NITRILE OXIDE COMPOUND, COMPOSITION, MODIFIED POLYOLEFIN AND METHOD FOR PRODUCING SAME, AND METHOD FOR PRODUCING BLOCK COPOLYMER
    Publication number: 20200283429
    Abstract: A nitrile oxide compound which is a compound represented by General Formula [I], in which a melting point is 25° C. to 300° C., and an equivalent of nitrile oxide is 1.0 to 4.5 mmol/g. In the general formula, s: an integer of 1 to 4; R1 and R2: a hydrocarbon group having 4 to 10 carbon atoms or a halogenated hydrocarbon group having 4 to 10 carbon atoms; X: a divalent hydrocarbon group, —O—, —S—, or —N(R3)—; R3: a hydrogen atom or a hydrocarbon group having 1 to 6 carbon atoms; and A: an s-valent organic group.
    Type: Application
    Filed: May 26, 2020
    Publication date: September 10, 2020
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Koji ITAGAKI, Hisashi OHTAKI, Toshikazu TAKATA, Hiromitsu SOGAWA
  • Metallocene compound, catalyst for olefin polymer, method for producing olefin polymer, and olefin polymer
    Patent number: 10005864
    Abstract: The invention provides a specific metallocene compound and an olefin polymerization catalyst for use for a catalyst for producing an olefin polymer having a sufficiently high molecular weight while maintaining excellent copolymerizability at a polymerization temperature and under polymerization conditions industrially advantageous in polymerization of an olefin such as ethylene or the like, and provides a method for producing an olefin polymer using the catalyst.
    Type: Grant
    Filed: May 9, 2017
    Date of Patent: June 26, 2018
    Assignee: JAPAN POLYETHYLENE CORPORATION
    Inventors: Koji Itagaki, Tsutomu Sakuragi, Takayoshi Takahashi
  • METALLOCENE COMPOUND, CATALYST FOR OLEFIN POLYMER, METHOD FOR PRODUCING OLEFIN POLYMER, AND OLEFIN POLYMER
    Publication number: 20170320981
    Abstract: The invention provides a specific metallocene compound and an olefin polymerization catalyst for use for a catalyst for producing an olefin polymer having a sufficiently high molecular weight while maintaining excellent copolymerizability at a polymerization temperature and under polymerization conditions industrially advantageous in polymerization of an olefin such as ethylene or the like, and provides a method for producing nan olefin polymer using the catalyst.
    Type: Application
    Filed: May 9, 2017
    Publication date: November 9, 2017
    Applicant: JAPAN POLYETHYLENE CORPORATION
    Inventors: Koji ITAGAKI, Tsutomu SAKURAGI, Takayoshi TAKAHASHI
  • Metallocene compound, catalyst for olefin polymer, method for producing olefin polymer, and olefin polymer
    Patent number: 9783625
    Abstract: The invention provides a specific metallocene compound and an olefin polymerization catalyst for use for a catalyst for producing an olefin polymer having a sufficiently high molecular weight while maintaining excellent copolymerizability at a polymerization temperature and under polymerization conditions industrially advantageous in polymerization of an olefin such as ethylene or the like, and provides a method for producing an olefin polymer using the catalyst.
    Type: Grant
    Filed: February 26, 2014
    Date of Patent: October 10, 2017
    Assignee: JAPAN POLYETHYLENE CORPORATION
    Inventors: Koji Itagaki, Tsutomu Sakuragi, Takayoshi Takahashi
  • METALLOCENE COMPOUND, CATALYST FOR OLEFIN POLYMER, METHOD FOR PRODUCING OLEFIN POLYMER, AND OLEFIN POLYMER
    Publication number: 20160009838
    Abstract: The invention provides a metallocene compound and an olefin polymerization catalyst for use for a catalyst for producing an olefin polymer having a sufficiently high molecular weight while maintaining excellent copolymerizability at a polymerization temperature and under polymerization conditions industrially advantageous in polymerization of an olefin such as ethylene or the like, and provides a method for producing nan olefin polymer using the catalyst.
    Type: Application
    Filed: February 26, 2014
    Publication date: January 14, 2016
    Applicant: JAPAN POLYETHYLENE CORPORATION
    Inventors: Koji ITAGAKI, Tsutomu SAKURAGI, Takayoshi TAKAHASHI