Patents by Inventor Yusuke Shinmen

Yusuke Shinmen 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).

  • Polyacrylonitrile-based copolymer, polyacrylonitrile-based precursor fiber for carbon fiber, carbon fiber bundles, process for producing stabilized fiber bundles, and process for producing carbon fiber bundles
    Patent number: 10017881
    Abstract: Provided are: a polyacrylonitrile-based precursor fiber for the production of a carbon fiber having a large single-fiber fineness, said precursor fiber ensuring high heat stability of a spinning dope and excellent productivity; and a copolymer suitable for the production of said precursor fiber. Also provided are: high-quality carbon fiber bundles which have a large single-fiber fineness and excellent productivity; a process for producing the same; and a process for producing flameproofed fiber bundles suitable for the production of the carbon fiber bundles. A polyacrylonitrile-based copolymer which comprises 93.0 to 99.4 mol % of acrylonitrile units, 0.5 to 4.0 mol % of (meth)acrylamide-based units, and 0.1 to 3.
    Type: Grant
    Filed: July 20, 2012
    Date of Patent: July 10, 2018
    Assignee: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Yusuke Shinmen, Norifumi Hirota, Naoki Aoyama, Naomasa Matsuyama, Takeshi Nii, Yasuyuki Fujii, Yoshiko Irie, Harumi Matsuda
  • POLYACRYLONITRILE-BASED COPOLYMER, POLYACRYLONITRILE-BASED PRECURSOR FIBER FOR CARBON FIBER, CARBON FIBER BUNDLES, PROCESS FOR PRODUCING STABILIZED FIBER BUNDLES, AND PROCESS FOR PRODUCING CARBON FIBER BUNDLES
    Publication number: 20140212663
    Abstract: Provided are: a polyacrylonitrile-based precursor fiber for the production of a carbon fiber having a large single-fiber fineness, said precursor fiber ensuring high heat stability of a spinning dope and excellent productivity; and a copolymer suitable for the production of said precursor fiber. Also provided are: high-quality carbon fiber bundles which have a large single-fiber fineness and excellent productivity; a process for producing the same; and a process for producing flameproofed fiber bundles suitable for the production of the carbon fiber bundles. A polyacrylonitrile-based copolymer which comprises 93.0 to 99.4 mol % of acrylonitrile units, 0.5 to 4.0 mol % of (meth)acrylamide-based units, and 0.1 to 3.
    Type: Application
    Filed: July 20, 2012
    Publication date: July 31, 2014
    Applicant: MITSUBISHI RAYON CO., LTD.
    Inventors: Yusuke Shinmen, Norifumi Hirota, Naoki Aoyama, Naomasa Matsuyama, Takeshi Nii, Yasuyuki Fujii, Yoshiko Irie, Harumi Matsuda
  • Acrylonitrile copolymer and method for producing the same, acrylonitrile copolymer solution and polyacrylonitrile precursor fiber for carbon fiber and method for producing the same
    Patent number: 8569408
    Abstract: Disclosed are an acrylonitrile copolymer excellent in thermal stability as a solution (spinning dope) when dissolved in an amide solvent and capable of forming dense polyacrylonitrile fiber suitable for production of carbon fiber, an acrylonitrile copolymer solution in which the acrylonitrile copolymer is dissolved in an amide solvent, and a method for producing polyacrylonitrile precursor fiber for carbon fiber by use of the acrylonitrile copolymer solution. Specifically, an acrylonitrile copolymer contains a sulfonate group derived from a polymerization initiator in an amount of 1.0×10?5 equivalent/g or more, and the value (equivalent ratio) of (the content of a sulfate group derived from the polymerization initiator/the total content of the sulfonate group and the sulfate group) is 0.4 or less; an acrylonitrile copolymer solution contains the aforementioned acrylonitrile copolymer and an amide solvent.
    Type: Grant
    Filed: May 12, 2009
    Date of Patent: October 29, 2013
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Norifumi Hirota, Yusuke Shinmen, Naomasa Matsuyama, Takeshi Nii, Harumi Shibatani
  • ACRYLONITRILE COPOLYMER AND METHOD FOR PRODUCING THE SAME, ACRYLONITRILE COPOLYMER SOLUTION AND POLYACRYLONITRILE PRECURSOR FIBER FOR CARBON FIBER AND METHOD FOR PRODUCING THE SAME
    Publication number: 20110130503
    Abstract: Disclosed are an acrylonitrile copolymer excellent in thermal stability as a solution (spinning dope) when dissolved in an amide solvent and capable of forming dense polyacrylonitrile fiber suitable for production of carbon fiber, an acrylonitrile copolymer solution in which the acrylonitrile copolymer is dissolved in an amide solvent, and a method for producing polyacrylonitrile precursor fiber for carbon fiber by use of the acrylonitrile copolymer solution. Specifically, an acrylonitrile copolymer contains a sulfonate group derived from a polymerization initiator in an amount of 1.0×10?5 equivalent/g or more, and the value (equivalent ratio) of (the content of a sulfate group derived from the polymerization initiator/the total content of the sulfonate group and the sulfate group) is 0.4 or less; an acrylonitrile copolymer solution contains the aforementioned acrylonitrile copolymer and an amide solvent.
    Type: Application
    Filed: May 12, 2009
    Publication date: June 2, 2011
    Applicant: Mitsubishi Rayon Co., Ltd.
    Inventors: Norifumi Hirota, Yusuke Shinmen, Naomasa Matsuyama, Takeshi Nii, Harumi Shibatani