Patents by Inventor Koichi Nakaoka

Koichi Nakaoka 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: 10968168
    Abstract: An isocyanate production method according to the present invention is a method in which an isocyanate is produced by subjecting a carbamate to thermal decomposition, and includes: a step of preparing a mixture liquid containing the carbamate, an inactive solvent and a polyisocyanate compound; a step of conducting a thermal decomposition reaction of the carbamate by continuously introducing the mixture liquid into a thermal decomposition reactor; a step of collecting a low-boiling decomposition product by continuously extracting the low-boiling decomposition product in a gaseous state from the reactor, the low-boiling decomposition product having a boiling point lower than the polyisocyanate compound; and a step of collecting a high-boiling component by continuously extracting, from the reactor, a liquid phase component which is not collected in a gaseous state at the step of collecting the low-boiling decomposition product.
    Type: Grant
    Filed: May 15, 2018
    Date of Patent: April 6, 2021
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Nobuhisa Miyake, Koichi Nakaoka, Tsubasa Uematsu, Yusuke Sakurai, Yusuke Ishii, Kazuhiro Takagaki, Takeharu Sasaki, Yuji Kosugi, Atsushi Ohkubo, Masaaki Shinohata
  • Publication number: 20200115327
    Abstract: An isocyanate production method according to the present invention is a method in which an isocyanate is produced by subjecting a carbamate to thermal decomposition, and includes: a step of preparing a mixture liquid containing the carbamate, an inactive solvent and a polyisocyanate compound; a step of conducting a thermal decomposition reaction of the carbamate by continuously introducing the mixture liquid into a thermal decomposition reactor; a step of collecting a low-boiling decomposition product by continuously extracting the low-boiling decomposition product in a gaseous state from the reactor, the low-boiling decomposition product having a boiling point lower than the polyisocyanate compound; and a step of collecting a high-boiling component by continuously extracting, from the reactor, a liquid phase component which is not collected in a gaseous state at the step of collecting the low-boiling decomposition product.
    Type: Application
    Filed: May 15, 2018
    Publication date: April 16, 2020
    Applicant: ASAHI KASEI KABUSHIKI KAISHA
    Inventors: Nobuhisa MIYAKE, Koichi NAKAOKA, Tsubasa UEMATSU, Yusuke SAKURAI, Yusuke ISHII, Kazuhiro TAKAGAKI, Takeharu SASAKI, Yuji KOSUGI, Atsushi OHKUBO, Masaaki SHINOHATA
  • Publication number: 20200048405
    Abstract: The present invention provides an isocyanate composition including an isocyanate compound having an ethylenically unsaturated bond, a compound represented by formula (1) (in the formula, R1 represents an a-valent organic group, R2 represents a monovalent organic group, a represents an integer of 1 or 2), and/or a compound having a UV absorption in a spectral region of a decamer or higher isocyanate measured by gel permeation chromatography; and an isocyanate composition including an isocyanate compound having an ethylenically unsaturated bond, or a compound having at least one unsaturated bond other than an unsaturated bond constituting an aromatic ring or an inert compound such as a hydrocarbon compound or the like and having a carbon-carbon unsaturated bond other than an unsaturated bond constituting an aromatic ring; or the like.
    Type: Application
    Filed: October 13, 2017
    Publication date: February 13, 2020
    Applicant: ASAHI KASEI KABUSHIKI KAISHA
    Inventors: Nobuhisa MIYAKE, Masaaki SHINOHATA, Atsushi OHKUBO, Koichi NAKAOKA, Yuji KOSUGI
  • Publication number: 20200048403
    Abstract: An isocyanate composition according to the present invention contains an isocyanate compound of formula (1) and/or (2) (wherein R1 represents a hydrogen or a monovalent organic group, and R2 represents a monovalent organic group), and, relative to the total mass of the isocyanate compound in the composition, 1.0 ppm by mass to 10% by mass of a compound of formula (3): R13—(COO—R14)a (wherein R13 represents an organic group with a valence of a, R14 represents a monovalent organic group, and a represents an integer of 1 or 2), which is different from the isocyanate compound, and/or, 1.0 ppm by mass to 10% by mass of a compound having an UV absorption in an area of decamer or higher isocyanates in a measurement spectrum of gel permeation chromatography.
    Type: Application
    Filed: October 13, 2017
    Publication date: February 13, 2020
    Applicant: ASAHI KASEI KABUSHIKI KAISHA
    Inventors: Nobuhisa MIYAKE, Masaaki SHINOHATA, Atsushi OHKUBO, Koichi NAKAOKA, Yuji KOSUGI
  • Publication number: 20160020003
    Abstract: Provided is an oxide superconductor composition that makes it possible to increase film thickness, increase production speed, and decrease costs when producing a REBaCuO-type oxide superconductor wire (wherein RE is at least one element selected from the group consisting of Y, Nd, Sm, Gd, Dy, Eu, Er, Yb, Pr, and Ho). The oxide superconductor comprises, as essential components thereof, an RE salt of a carboxylic acid that serves as an RE component, that does not contain a ketone group, and that has 3-8 carbon atoms, barium trifluoroacetate that serves as a Ba component, one or more copper salts that serve as a Cu component and that are selected from the group consisting of copper salts of branched saturated aliphatic carboxylic acids having 6-16 carbon atoms and copper salts of alicyclic carboxylic acids having 6-16 carbon atoms, and an organic solvent that dissolves the aforementioned metal salt components.
    Type: Application
    Filed: February 27, 2014
    Publication date: January 21, 2016
    Inventors: Koichi NAKAOKA, Masateru YOSHIZUMI, Teruo IZUMI, Yuh SHIOHARA, Tatsunori NAKAMURA
  • Publication number: 20130217581
    Abstract: Provided is an oxide superconducting wire material, wherein pinning of magnetic flux, under an environment in which magnetic field is applied, can be conducted efficiently towards any magnetic-field applying angle direction, to secure a high superconductive property. The oxide superconducting wire material (100) is provided with a metal substrate (110), an intermediate layer (120) formed upon the metal substrate (110), and a REBaCuO-system superconductive layer (140) formed upon the intermediate layer (120). RE comprises one or more elements selected from Y, Nd, Sm, Eu, Gd, and Ho. Oxide particles including Zr are distributed within the superconductive layer (140) as magnetic-flux pinning points (145), and the mole ratio (y) of Ba included within the superconductive layer (140) is, when the mole ratio of Zr is assumed to be x, within a range of (1.2+ax)?y?(1.8+ax), wherein 0.5?a?2.
    Type: Application
    Filed: October 26, 2011
    Publication date: August 22, 2013
    Inventors: Masateru Yoshizumi, Koichi Nakaoka, Yasuo Takahashi, Teruo Izumi, Yuh Shiohara, Yuji Aoki, Katsuhisa Kanbayashi
  • Patent number: 8409657
    Abstract: A production process of a thick-film tape-shaped RE-type (123) superconductor having a high critical current value. The production process has the steps of providing a composite substrate having Gd2Zr2O7 and CeO2 stacked in that order onto a Hastelloy substrate, coating a raw material solution prepared by dissolving a trifluoroacetate of Y and Ba and a naphthenate of Cu onto the composite substrate, heat treating the coated composite substrate by calcination, then subjecting the calcined assembly to intermediate heat-treatment at a temperature below the temperature of heat-treatment for superconductor production, and then heat treating the assembly in an argon gas atmosphere under conditions of highest heating temperature 760° C., water vapor partial pressure 13.5%, and oxygen partial pressure 0.09% for superconductor production to produce a tape-shaped RE-type (123) superconductor having a YBCO superconducting film having a thickness of more than about 2 ?m.
    Type: Grant
    Filed: December 7, 2006
    Date of Patent: April 2, 2013
    Assignees: The Jurical Foundation, SWCC Showa Cable Systems Co., Ltd.
    Inventors: Ryo Teranishi, Yuji Aoki, Junko Matsuda, Koichi Nakaoka, Teruo Izumi, Yuh Shiohara
  • Publication number: 20090286686
    Abstract: This invention provides a production process of a thick-film tape-shaped RE-type (123) superconductor having a high critical current value. The production process comprises providing a composite substrate comprising Gd2Zr2O7 and CeO2 stacked in that order onto a Hastelloy substrate, coating a raw material solution prepared by dissolving a trifluoroacetate of Y and Ba and a naphthenate of Cu onto the composite substrate, heat treating the coated composite substrate by calcination, then subjecting the calcined assembly to intermediate heat-treatment at a temperature below the temperature of heat-treatment for superconductor production, and then heat treating the assembly in an argon gas atmosphere under conditions of highest heating temperature 760° C., water vapor partial pressure 13.5%, and oxygen partial pressure 0.09% for superconductor production to produce a tape-shaped RE-type (123) superconductor comprising a YBCO superconducting film having a thickness of more than about 2 ?m.
    Type: Application
    Filed: December 7, 2006
    Publication date: November 19, 2009
    Applicants: INTERNATIONAL SUPERCONDUCTIVITY TECHNOLOGY CENTER THE JURIDICAL FOUNDATION, SWCC SHOWA CABLE SYSTEMS CO., LTD.
    Inventors: Ryo Teranishi, Yuji Aoki, Junko Matsuda, Koichi Nakaoka, Teruo Izumi, Yuh Shiohara
  • Publication number: 20090270263
    Abstract: This invention provides a production process of a tape-shaped superconductor which can realize high Jc and Ic values by virtue of the elimination of the cause of generation of cracks and deterioration of an electrical connectivity in crystal grain boundaries. In producing an Re-base (123) superconductor on a substrate by an MAD process, the use of a raw material solution having a Re:Ba:Cu molar ratio of 1:X:3, wherein X is a Ba molar ratio satisfying X<2 (preferably 1.0?X?1.8, especially 1.3?x?1.7), can realize the production of a thick-film tape-shaped superconductor having a superconductivity of Jc=3.20 MA/cm2 and Ic=525 A/cm (X=1.5).
    Type: Application
    Filed: June 12, 2007
    Publication date: October 29, 2009
    Applicants: INTERNATIONAL SUPERCONDUCTIVITY TECHNOLOGY CENTER, THE JURIDICAL FOUNDATION, SWCC SHOWA CABLE SYSTEMS CO., LTD.
    Inventors: Yuji Aoki, Koichi Nakaoka, Junko Matsuda, Masateru Yoshizumi, Teruo Izumi, Yuh Shiohara