Patents by Inventor Motoaki ARAKI

Motoaki ARAKI 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: 11591480
    Abstract: A method of manufacturing a solid electrolytic capacitor, including: a step (A) of providing a conjugated conductive polymer-containing dispersion by polymerizing, in a dispersion medium containing seed particles turned into protective colloid by a polyanion or in a dispersion medium containing the polyanion, a monomer for obtaining a conjugated conductive polymer; a step (B) of preparing a dispersion containing a morpholine compound and the conjugated conductive polymer by adding the morpholine compound to the conjugated conductive polymer-containing dispersion; a step (C) of causing the dispersion to adhere to a porous anode body formed of a valve metal having a dielectric film on a surface thereof; and a step (D) of forming a solid electrolyte layer by removing the dispersion medium from the dispersion containing the morpholine compound and the conjugated conductive polymer, the dispersion adhering to the porous anode body.
    Type: Grant
    Filed: May 9, 2018
    Date of Patent: February 28, 2023
    Assignee: SHOWA DENKO K.K.
    Inventors: Motoaki Araki, Takashi Okubo
  • Publication number: 20210130628
    Abstract: A method of manufacturing a solid electrolytic capacitor, including: a step (A) of providing a conjugated conductive polymer-containing dispersion by polymerizing, in a dispersion medium containing seed particles turned into protective colloid by a polyanion or in a dispersion medium containing the polyanion, a monomer for obtaining a conjugated conductive polymer; a step (B) of preparing a dispersion containing a morpholine compound and the conjugated conductive polymer by adding the morpholine compound to the conjugated conductive polymer-containing dispersion; a step (C) of causing the dispersion to adhere to a porous anode body formed of a valve metal having a dielectric film on a surface thereof; and a step (D) of forming a solid electrolyte layer by removing the dispersion medium from the dispersion containing the morpholine compound and the conjugated conductive polymer, the dispersion adhering to the porous anode body.
    Type: Application
    Filed: May 9, 2018
    Publication date: May 6, 2021
    Applicant: SHOWA DENKO K.K.
    Inventors: Motoaki ARAKI, Takashi OKUBO
  • Patent number: 10563020
    Abstract: A method for producing a conductive polymer-containing dispersion, the method including a polymerization step of subjecting a monomer that is to be a constitutional unit of a conjugated conductive polymer to a polymerization reaction in a mixed solution containing the monomer, a polyanion, and a dispersion medium to produce a polymerized product; and a dispersion treatment step of performing a dispersion treatment on a reaction solution obtained in the polymerization step to prepare a dispersion of the polymerized product, wherein a dispersion medium is added one or more times at any point in time from after the polymerization step to during the dispersion treatment step to make a mass concentration (B) of the polymerized product in the dispersion after the dispersion treatment step lower than a mass concentration (A) of the polymerized product in the reaction solution.
    Type: Grant
    Filed: December 1, 2016
    Date of Patent: February 18, 2020
    Assignee: SHOWA DENKO K.K.
    Inventors: Miyo Fujita, Motoaki Araki, Takashi Ohkubo
  • Patent number: 10563071
    Abstract: The present invention provides a method for producing a conductive polymer-containing dispersion, including: a polymerization step of polymerizing a monomer for obtaining a conjugated conductive polymer in a dispersion medium including the monomer and seed particles converted into a colloid protected by a polyanion.
    Type: Grant
    Filed: March 11, 2014
    Date of Patent: February 18, 2020
    Assignee: SHOWA DENKO K.K.
    Inventors: Yasuyuki Tagawa, Naoki Murata, Motoaki Araki, Takashi Ohkubo
  • Publication number: 20190382580
    Abstract: A curable aqueous resin emulsion composition containing: 100 parts by mass of a (meth)acrylate epoxy resin (a); from 1 to 200 parts by mass of a polymerizable unsaturated monomer (b); from 0.1 to 10 parts by mass of a curing accelerator (c); from 1 to 50 parts by mass of a reactive surfactant (d); from 10 to 2,000 parts by mass of water (e); a radical polymerization initiator (f); and at least one of a component (g) and a component (h) below: (g) at least one selected from inorganic particles and organic particles, and (h) at least one compound selected from an alkoxysilane compound, a metal alkoxy compound, a metal chelate compound, an epoxy compound, an isocyanate compound, and a triazine compound.
    Type: Application
    Filed: January 22, 2018
    Publication date: December 19, 2019
    Applicant: SHOWA DENKO K.K.
    Inventors: Jun KUWAHARA, Kimihiko NAKAMURA, Hidekazu MUKUNO, Motoaki ARAKI
  • Publication number: 20180371177
    Abstract: A method for producing a conductive polymer-containing dispersion, the method including a polymerization step of subjecting a monomer that is to be a constitutional unit of a conjugated conductive polymer to a polymerization reaction in a mixed solution containing the monomer, a polyanion, and a dispersion medium to produce a polymerized product; and a dispersion treatment step of performing a dispersion treatment on a reaction solution obtained in the polymerization step to prepare a dispersion of the polymerized product, wherein a dispersion medium is added one or more times at any point in time from after the polymerization step to during the dispersion treatment step to make a mass concentration (B) of the polymerized product in the dispersion after the dispersion treatment step lower than a mass concentration (A) of the polymerized product in the reaction solution.
    Type: Application
    Filed: December 1, 2016
    Publication date: December 27, 2018
    Applicant: SHOWA DENKO K.K.
    Inventors: Miyo FUJITA, Motoaki ARAKI, Takashi OHKUBO
  • Patent number: 9640325
    Abstract: A method for manufacturing a solid electrolytic capacitor, which includes the steps of: in a dispersion medium containing a monomer for obtaining a conjugated conductive polymer and a seed particle with protective colloid formed of a polyanion, polymerizing the monomer to obtain a conjugated conductive polymer-containing dispersion liquid; attaching the conjugated conductive polymer-containing dispersion liquid to the surface of a porous anode body at least having an anode body made of a valve metal and a dielectric film formed on the surface of the anode body; and removing a part or all of the dispersion medium from the conjugated conductive polymer-containing dispersion liquid attached to the porous anode body to form a solid electrolyte layer. Also disclosed is a solid electrolytic capacitor obtained by the method.
    Type: Grant
    Filed: April 4, 2014
    Date of Patent: May 2, 2017
    Assignee: SHOWA DENKO K.K.
    Inventors: Yasuyuki Tagawa, Naoki Murata, Motoaki Araki, Takashi Ohkubo
  • Publication number: 20160055981
    Abstract: A method for manufacturing a solid electrolytic capacitor, which includes the steps of: in a dispersion medium containing a monomer for obtaining a conjugated conductive polymer and a seed particle with protective colloid formed of a polyanion, polymerizing the monomer to obtain a conjugated conductive polymer-containing dispersion liquid; attaching the conjugated conductive polymer-containing dispersion liquid to the surface of a porous anode body at least having an anode body made of a valve metal and a dielectric film formed on the surface of the anode body; and removing a part or all of the dispersion medium from the conjugated conductive polymer-containing dispersion liquid attached to the porous anode body to form a solid electrolyte layer. Also disclosed is a solid electrolytic capacitor obtained by the method.
    Type: Application
    Filed: April 4, 2014
    Publication date: February 25, 2016
    Applicant: SHOWA DENKO K.K.
    Inventors: Yasuyuki TAGAWA, Naoki MURATA, Motoaki ARAKI, Takashi OHKUBO
  • Publication number: 20160024315
    Abstract: The present invention provides a method for producing a conductive polymer-containing dispersion, including: a polymerization step of polymerizing a monomer for obtaining a conjugated conductive polymer in a dispersion medium including the monomer and seed particles converted into a protective colloid by a polyanion.
    Type: Application
    Filed: March 11, 2014
    Publication date: January 28, 2016
    Applicant: SHOWA DENKO K.K.
    Inventors: Yasuyuki TAGAWA, Naoki MURATA, Motoaki ARAKI, Takashi OHKUBO