Patents by Inventor Shinsuke Yabunaka

Shinsuke Yabunaka 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: 10487159
    Abstract: An object of the present invention is to achieve a high polymerization ratio and high functional group introduction ratio during production of a (meth)acrylic polymer having a functional group at one end, while suppressing formation of a disulfide. According to the constitution of the present invention, a method for producing a (meth)acrylic polymer having a functional group at one end includes subjecting a (meth)acrylic monomer to a polymerization reaction, in the presence of an inert gas containing 0.01% to 6.0% by volume of oxygen, by using, as an initiating species, a compound having a functional group and a thiol group.
    Type: Grant
    Filed: August 30, 2016
    Date of Patent: November 26, 2019
    Assignee: Soken Chemical & Engineering Co., Ltd.
    Inventors: Takeshi Miyamoto, Takahiro Okubo, Hiroto Matsumoto, Shu-ichi Goto, Shinsuke Yabunaka
  • Publication number: 20190040164
    Abstract: An object of the present invention is to achieve a high polymerization ratio and high functional group introduction ratio during production of a (meth)acrylic polymer having a functional group at one end, while suppressing formation of a disulfide. According to the constitution of the present invention, a method for producing a (meth)acrylic polymer having a functional group at one end includes subjecting a (meth)acrylic monomer to a polymerization reaction, in the presence of an inert gas containing 0.01% to 6.0% by volume of oxygen, by using, as an initiating species, a compound having a functional group and a thiol group.
    Type: Application
    Filed: August 30, 2016
    Publication date: February 7, 2019
    Inventors: Takeshi Miyamoto, Takahiro Okubo, Hiroto Matsumoto, Shu-ichi Goto, Shinsuke Yabunaka
  • Publication number: 20170198115
    Abstract: Provided is a calcining paste composition having excellent printability and good calcining property while having appropriate viscosity. The calcining paste composition includes a copolymer (A) obtained by copolymerizing a monomer mixture containing a monomer (a-1) represented by the formula (I) in an amount of 10 to 80% by mass and a monomer (a-2) represented by the formula (II) in an amount of 20 to 90% by mass, said copolymer (A) having Mw of 2.01×105 to 1.5×106.
    Type: Application
    Filed: May 11, 2015
    Publication date: July 13, 2017
    Inventors: Hiroto Matsumoto, Shinsuke Yabunaka, Shu-ichi Goto
  • Publication number: 20100041860
    Abstract: A polyimide obtained by reacting a tetracarboxylic acid component with a diamine component containing a diamine compound represented by the following general formula (1): wherein, A represents a biphenylene group which may be substituted with an alkyl group having up to 4 carbon atoms.
    Type: Application
    Filed: November 12, 2007
    Publication date: February 18, 2010
    Applicant: UBE INDUSTRIES, LTD.
    Inventors: Hiroaki Yamaguchi, Shuichi Maeda, Nobuharu Hisano, Shinsuke Yabunaka, Kiyotaka Yoshii, Masayoshi Ohue, Akio Matsushita, Yasuhiro Kawachi
  • Publication number: 20090197068
    Abstract: Disclosed is a polyimide film prepared from an aromatic tetracarboxylic acid component consisting essentially of 3,3?,4,4?-biphenyltetracarboxylic dianhydride and an aromatic diamine component consisting essentially of not less than 65 mol phenylenediamine % but less than 97 mol % of p-phenylenediamine and not less than 3 mol % but less than 35 mol % of 2,4-toluenediamine.
    Type: Application
    Filed: January 30, 2009
    Publication date: August 6, 2009
    Applicant: UBE INDUSTRIES, LTD.
    Inventors: Hiroaki Yamaguchi, Masafumi Kohda, Nobuharu Hisano, Shinsuke Yabunaka
  • Publication number: 20080241497
    Abstract: A solution containing a silane coupling agent, in which 5% or more of the alkoxy group bound to an Si atom is hydrolyzed, and substantially no water, is applied to one side or both sides of a self-supporting film of a polyimide precursor solution, and then the self-supporting film is heated to effect imidization, thereby providing a polyimide film having a thickness of 7 ?m to 30 ?m with reliably improved adhesiveness.
    Type: Application
    Filed: March 31, 2008
    Publication date: October 2, 2008
    Applicant: UBE INDUSTRIES, LTD.
    Inventors: Hiroaki Yamaguchi, Shinsuke Yabunaka