Patents Assigned to Showa Denko K.K.
  • Patent number: 10851199
    Abstract: An epoxy (meth)acrylate compound represented by general formula (1): where at least one of R1 to R5 has a structure represented by formula (2): * denotes the bonding position to a carbon atom that constitutes the benzene ring to which R1 to R5 are bonded in formula (1), R7 denotes a hydrogen atom or a methyl group, the remainder of R1 to R5 are each independently selected from the group consisting of hydrogen atoms, alkyl groups and alkoxy groups having 1-6 carbon atoms, and R6 denotes a hydrogen atom or a methyl group. In the epoxy (meth)acrylate compound, the content of halogen atoms is 100 ppm by mass or less. A curable composition for forming a protective film for an electrically conductive pattern obtained by mixing the epoxy (meth)acrylate compound with a photopolymerization initiator and at least one type of monomer or oligomer that contains a (meth)acryloyl group.
    Type: Grant
    Filed: July 24, 2017
    Date of Patent: December 1, 2020
    Assignee: SHOWA DENKO K. K.
    Inventors: Masahiko Toba, Jun Dou, Chika Yamashita, Yoshitaka Ishibashi, Hiroshi Uchida
  • Patent number: 10844517
    Abstract: A method of processing a SiC single crystal includes a measuring step of measuring a shape of an atomic arrangement plane of the SiC single crystal along at least a first direction passing through a center in plan view and a second direction orthogonal to the first direction; and a surface processing step of processing a first plane serving as an attachment plane of the SiC single crystal, in which the surface processing step includes a grinding step of grinding the first plane, and in the grinding step, a difference is given to a surface state between the first plane and a second plane facing the first plane, and the atomic arrangement plane is flattened by Twyman's effect.
    Type: Grant
    Filed: December 19, 2018
    Date of Patent: November 24, 2020
    Assignee: SHOWA DENKO K.K.
    Inventor: Yohei Fujikawa
  • Publication number: 20200362206
    Abstract: A radical-curable adhesive composition comprising a rubber (a) having one or more (meth)acryloyl groups within a single molecular chain thereof, a polymerizable monomer (b) having both an epoxy group and a (meth)acryloyloxy group in a molecule thereof, a radical polymerization initiator (c) and an acicular filler (d) having a fiber length of 500 to 2000 ?m and an aspect ratio of 5 to 300.
    Type: Application
    Filed: October 4, 2018
    Publication date: November 19, 2020
    Applicant: SHOWA DENKO K.K.
    Inventors: Ryohei ITO, Nobuyuki TAKAHASHI, Ryujin ISHIUCHI
  • Patent number: 10837123
    Abstract: A method of measuring a SiC ingot includes a measuring step of measuring a curving direction of an atomic arrangement plane of a SiC single crystal at least along a first direction passing through a center in plan view and a second direction intersecting with the first direction to obtain a shape of the atomic arrangement plane; and a crystal growth step of performing crystal growth using the SiC single crystal as a seed crystal, in which in a case where the shape of the atomic arrangement plane measured in the measuring step is a saddle type, a crystal growth condition in the crystal growth step is set such that a convexity of a second growth front at the end of crystal growth becomes larger than a convexity of a first growth front when an amount of crystal growth in the center of the seed crystal is 7 mm.
    Type: Grant
    Filed: December 19, 2018
    Date of Patent: November 17, 2020
    Assignee: SHOWA DENKO K.K.
    Inventor: Yohei Fujikawa
  • Publication number: 20200354217
    Abstract: A method for producing a hydrogen chloride mixture containing hydrogen chloride and water, the method including: a first dehydration step of cooling a hydrogen chloride mixture in which a concentration of water is 1 mol ppm or more, to condense and separate water in the hydrogen chloride mixture; a second dehydration step of bringing a hydrogen chloride mixture obtained in the first dehydration step into contact with a water adsorbent to allow a concentration of water to be less than 0.5 mol ppm; and a filling step of filling a filling container with a hydrogen chloride mixture obtained in the second dehydration step so that at least a part of the hydrogen chloride mixture is liquid, and a concentration of water in a liquid phase at a time of completion of the filling is 0.01 mol ppm or more and less than 1 mol ppm.
    Type: Application
    Filed: June 4, 2020
    Publication date: November 12, 2020
    Applicant: SHOWA DENKO K.K.
    Inventors: Yosuke TANIMOTO, Yasuyuki Hoshino
  • Patent number: 10829848
    Abstract: A magnetic recording medium includes a non-magnetic substrate, a soft magnetic underlayer, an orientation control layer, a perpendicular magnetic layer, and a protective layer arranged in this order. The perpendicular magnetic layer includes a first magnetic layer and a second magnetic layer from the non-magnetic substrate side in this order. The second magnetic layer contains a magnetic grain and provided farthest from the non-magnetic substrate. The first magnetic layer has a granular structure that contains an oxide in a grain boundary. The second magnetic layer has a granular structure that contains a carbide of an element contained in the magnetic grain in a grain boundary.
    Type: Grant
    Filed: December 18, 2017
    Date of Patent: November 10, 2020
    Assignee: SHOWA DENKO K.K.
    Inventors: Kota Hasegawa, Haruhisa Ohashi
  • Patent number: 10832720
    Abstract: A magnetic recording medium includes a non-magnetic substrate, a soft magnetic underlayer, an orientation control layer, a perpendicular magnetic layer, and a protective layer arranged in this order. The perpendicular magnetic layer includes a first magnetic layer and a second magnetic layer from the non-magnetic substrate side in this order. The second magnetic layer contains a magnetic grain and provided farthest from the non-magnetic substrate. The first magnetic layer has a granular structure that contains an oxide in a grain boundary. The second magnetic layer has a granular structure that contains a nitride of an element contained in the magnetic grain in a grain boundary.
    Type: Grant
    Filed: December 5, 2017
    Date of Patent: November 10, 2020
    Assignee: SHOWA DENKO K.K.
    Inventors: Kota Hasegawa, Haruhisa Ohashi
  • Publication number: 20200346997
    Abstract: There is provided a method of producing 1,2,3,4-tetrachlorobutane capable of stably and economically producing 1,2,3,4-tetrachlorobutane. A reactant solution (1) containing 3,4-dichloro-1-butene is charged in a reaction vessel (11) having an inner surface, to be brought into contact with the reactant solution (1), made of a metal and a chlorine gas is introduced into the reactant solution (1) to perform a reaction between 3,4-dichloro-1-butene and the chlorine gas to produce 1,2,3,4-tetrachlorobutane. The reaction is performed while carrying out an operation of taking out at least a portion of the reactant solution (1) from the reaction vessel (11), filtering the reactant solution (1) thus taken out to remove a solid matter, and returning the filtered reactant solution (1) into the reaction vessel (11).
    Type: Application
    Filed: October 11, 2018
    Publication date: November 5, 2020
    Applicant: SHOWA DENKO K.K.
    Inventors: Katsumi MIKAMI, Nozomi KUSUMOTO, Shinya OGURO, Yohsuke FUKUCHI
  • Publication number: 20200350597
    Abstract: An electrode of a redox flow battery, provided with a liquid inflow layer (1) into which an electrolytic solution flows, a liquid outflow layer (3) from which the electrolytic solution flows out, and a main electrode layer (2) disposed between the liquid inflow layer (1) and the liquid outflow layer (3). The liquid outflow layer (3) has a thickness that is less than that of the liquid inflow layer (1). Also disclosed is a redox flow battery including an ion exchange membrane, the electrode and a current collector plate in this order. The electrode is arranged such that the liquid inflow layer is on a side of the current collector plate and the liquid outflow layer is on a side of the ion exchange membrane.
    Type: Application
    Filed: December 14, 2018
    Publication date: November 5, 2020
    Applicant: SHOWA DENKO K. K.
    Inventors: Takaharu HOSHINA, Miyuki TOMITA
  • Publication number: 20200346998
    Abstract: Provided is a method for producing a fluorine-containing organic compound. The method can immediately detect the occurrence of a side reaction in direct fluorination reaction using fluorine gas and can give a highly pure fluorine-containing organic compound at a high yield. A raw material liquid (1) containing a raw material organic compound having a hydrogen atom and two or more carbon atoms is reacted with fluorine gas in a reaction container (11) to replace the hydrogen atom of the raw material organic compound with a fluorine atom to give a fluorine-containing organic compound. In the reaction, tetrafluoromethane contained in a gas phase (2) in the reaction container (11) is continuously measured, and the amount of the fluorine gas supplied to the reaction container (11) is controlled depending on the measured value of the tetrafluoromethane.
    Type: Application
    Filed: November 7, 2018
    Publication date: November 5, 2020
    Applicant: SHOWA DENKO K.K.
    Inventors: Yohsuke FUKUCHI, Shinichi YOROZUYA, Nozomi KUSUMOTO, Hiroshi KOBAYASHI
  • Publication number: 20200347159
    Abstract: A catalyst for olefin polymerization that contains a metal complex represented by general formula (C1) and a method for producing polyethylene, a copolymer of ethylene and an olefin having a polar group represented by general formula (1), or a copolymer of ethylene, an olefin having a polar group represented by general formula (1) and another monomer, using the aforementioned metal complex as a polymerization catalyst, wherein the symbols in formula (C1) and formula (1) are as defined in the specification.
    Type: Application
    Filed: November 7, 2018
    Publication date: November 5, 2020
    Applicants: THE UNIVERSITY OF TOKYO, SHOWA DENKO K. K., JAPAN POLYETHYLENE CORPORATION
    Inventors: Kyoko NOZAKI, Shingo ITO, Junichi KURODA, Yoshikuni OKUMURA, Shinya HAYASHI, Yumiko MINAMI, Minoru KOBAYASHI, Yuichiro YASUKAWA
  • Publication number: 20200350590
    Abstract: A binder for a nonaqueous battery electrode, the nonaqueous battery electrode using the binder for the nonaqueous battery electrode, and a nonaqueous battery. The binder for a nonaqueous battery electrode contains a copolymer (P) of an ethylenically unsaturated monomer (A) essentially containing a styrene-based monomer (a1) and a (meta)acrylic ester (a2), and a surfactant (B1) having an ethylenically unsaturated bond, wherein the total amount of structure units derived from the surfactant (B1) having the ethylenically unsaturated bond in the copolymer (P) and the surfactant (B2) not contained in the copolymer (P) is 0.10 to 1.00 parts by mass based on 100 parts by mass of the copolymer (P). Also disclosed is a method for producing the binder.
    Type: Application
    Filed: December 26, 2018
    Publication date: November 5, 2020
    Applicant: SHOWA DENKO K. K.
    Inventors: Junya UCHIYASHIKI, Mitsuru HANASAKI, Tomonori KURATA
  • Publication number: 20200350619
    Abstract: A lithium-ion rechargeable battery (1) includes: a positive electrode layer (30) containing a positive electrode active material; a solid electrolyte layer (40) containing an inorganic solid electrolyte; a storage layer (50) made of porous platinum (Pt) and storing lithium; a coating layer (60) made of an amorphous chromium-titanium (CrTi) alloy; and a negative electrode collector layer (70) made of platinum (Pt); these layers are stacked in this order. The storage layer (50) is first composed of a dense platinum layer formed by sputtering, and then undergoes initial charge and discharge to become porous, which results in a porous part (51) and a number of pores (52) being formed. This restrains or prevents peeling inside the all-solid lithium-ion rechargeable battery.
    Type: Application
    Filed: November 26, 2018
    Publication date: November 5, 2020
    Applicant: SHOWA DENKO K.K.
    Inventors: Takaki YASUDA, Akira SAKAWAKI, Haruaki UCHIDA
  • Publication number: 20200343571
    Abstract: A redox flow battery 1 including: a battery cell (10) including a positive electrode (11), a negative electrode (12), and an ion exchange membrane (13); a positive electrode-side electrolyte tank (20); a negative electrode-side electrolyte tank (30); a positive electrode-side pipe connecting the battery cell (10) to the positive electrode-side electrolyte tank (20); and a negative electrode-side pipe connecting the battery cell (10) to the negative electrode-side electrolyte tank (30). The redox flow battery (1) performs charge and discharge by circulating respective electrolytes between the battery cell (10) and the positive electrode-side electrolyte tank (20) through the positive electrode-side pipe (21, 22) and between the battery cell (10) and the negative electrode-side electrolyte tank (30) through the negative electrode-side pipe (31, 32). A hydrogen gas amount decreasing means (40) having a hydrogen gas amount decreasing device (60) is provided on the negative electrode-side pipe (31, 32).
    Type: Application
    Filed: December 18, 2018
    Publication date: October 29, 2020
    Applicant: SHOWA DENKO K.K.
    Inventors: Miyuki TOMITA, Masahiro SUZUKI, Tingting ZHOU
  • Publication number: 20200339904
    Abstract: The lubricating oil composition includes a base oil and a fullerene adduct.
    Type: Application
    Filed: October 24, 2018
    Publication date: October 29, 2020
    Applicant: SHOWA DENKO K.K.
    Inventors: Ryuji MONDEN, Yu GAO, Kunio KONDO, Masumi KURITANI
  • Publication number: 20200339419
    Abstract: Glass-coated aluminum nitride particles and a method for producing the same. The glass-coated aluminum nitride particles include aluminum nitride particles and a glass phase which covers at least a part of the surface of each aluminum nitride particle. The glass phase is a composition which contains at least a glass component; and the proportion of the composition containing a glass component is 0.2 parts by weight to 5.0 parts by weight with respect to 100 parts by weight of the aluminum nitride particles. The composition containing the glass component further contains boron nitride particle; and the aluminum nitride particles have a volume cumulative d50 of from 10 ?m to 200 ?m.
    Type: Application
    Filed: December 10, 2018
    Publication date: October 29, 2020
    Applicant: SHOWA DENKO K.K.
    Inventors: Yuki OTSUKA, Hidetoshi OKAMOTO
  • Publication number: 20200339849
    Abstract: An alumina sintered body including an inner layer in which alumina crystal grains contained have an average aspect ratio of 1.0 to 2.0 and an outer layer which covers at least a part of the inner layer from outside and in which alumina crystal grains contained have an average aspect ratio of more than 2.0, the alumina sintered body being free from silicon except unavoidable impurities.
    Type: Application
    Filed: December 19, 2018
    Publication date: October 29, 2020
    Applicant: SHOWA DENKO K.K.
    Inventor: So MIYAISHI
  • Publication number: 20200341077
    Abstract: A magnetic sensor 1 includes: a thin film magnet 20 which is constituted by a hard magnetic material layer 103 and has magnetic anisotropy in an in-plane direction; and a sensitive part 30 including a sensitive element 31 sensing a magnetic field by a magnetic impedance effect, the sensitive element 31 being constituted by a soft magnetic material layer 105 laminated on the hard magnetic material layer 103, having a longitudinal direction and a short direction, and having uniaxial magnetic anisotropy in a direction intersecting the longitudinal direction, in which the longitudinal direction faces in the direction of a magnetic field generated by the thin film magnet 20. The thin film magnet 20 and the sensitive element 31 are provided to constitute a magnetic circuit with a facing member provided outside to face one of magnetic poles of the thin film magnet 20.
    Type: Application
    Filed: October 25, 2018
    Publication date: October 29, 2020
    Applicant: SHOWA DENKO K.K.
    Inventor: Daizo ENDO
  • Patent number: 10811686
    Abstract: A slurry for a positive electrode of a lithium-ion secondary battery. Also disclosed is a positive electrode for a lithium-ion secondary battery obtained using the slurry for a positive electrode of a lithium-ion secondary battery, and a production method for the electrode; and a lithium-ion secondary battery provided with the positive electrode for a lithium-ion secondary battery, and a production method for the battery. The slurry for a positive electrode of a lithium-ion secondary battery includes a positive electrode active material (A), a conductive auxiliary agent (B), a resin binder (C), a thickening dispersant (D), and water (E), wherein the thickening dispersant (D) includes a polyalkylene oxide having a phenyl group in a side chain thereof.
    Type: Grant
    Filed: August 3, 2016
    Date of Patent: October 20, 2020
    Assignee: SHOWA DENKO K.K.
    Inventors: Yusuke Aoki, Mitsuru Hanasaki
  • Publication number: 20200323759
    Abstract: A gel composition containing (a) at least one selected from tocopherol phosphoric acid esters and salts thereof; (b) carrageenan; (c) locust bean gum; (d) at least one selected from agar and glucomannan; and e) water.
    Type: Application
    Filed: October 5, 2018
    Publication date: October 15, 2020
    Applicant: SHOWA DENKO K.K.
    Inventors: Natsuno MISHINA, Naoko ITO, Manami HATANO, Risa IGUCHI