Patents Assigned to Showa Denko K.K.
  • Patent number: 11180457
    Abstract: Provided is a fluorine-containing ether compound capable of forming a lubricant layer having excellent wear resistance even when the thickness is thin, and suitable as a material of a lubricant for a magnetic recording medium. The fluorine-containing ether compound is a compound represented by the following formula (1): R1—R2—CH2—R3—CH2—R4—R5; wherein R3 is a perfluoropolyether chain; R1 is a terminal group bonded to R2; R5 is a terminal group bonded to R4; R1 is an alkenyl group or an alkynyl group; R5 is a group containing a heterocyclic ring; R2 is represented by the following formula (2); R4 is represented by the following formula (3); and a in the formula (2) and b in the formula (3) are each independently an integer of 1 to 3.
    Type: Grant
    Filed: August 28, 2018
    Date of Patent: November 23, 2021
    Assignee: SHOWA DENKO K. K.
    Inventors: Tsuyoshi Kato, Daisuke Yagyu, Naoya Fukumoto, Yuta Yamaguchi, Masumi Kuritani, Katsumi Murofushi, Masaki Nanko, Hiroyuki Tomita
  • Patent number: 11183340
    Abstract: A method of producing a solid electrolytic capacitor, including a step of forming a dielectric film on the surface of a valve-acting metal having fine pores and a step of forming a solid electrolyte layer containing a conductive polymer on the dielectric film; wherein the solid electrolyte layer containing the conductive polymer is formed without using an oxidizing agent by: (i) a method of polymerizing at least one of the compounds (A1) represented by formula (1) disclosed herein in the presence of a compound (B) having a sulfo group; (ii) a method of copolymerizing at least one compound (A2) represented by formula (2) disclosed herein; and (iii) a method of polymerizing at least one of the compounds (A1) and (A2).
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: November 23, 2021
    Assignee: SHOWA DENKO K.K.
    Inventors: Takeshi Kawamoto, Yuka Niimi, Toshiya Kawasaki, Yoshinori Shibuya, Takeshi Kohama
  • Patent number: 11167264
    Abstract: Provided is a packing material for liquid chromatography, including a gel obtained by polymerizing monomers including 40% by mass or more of a crosslinkable monomer having a (meth)acryloyloxy group.
    Type: Grant
    Filed: March 3, 2016
    Date of Patent: November 9, 2021
    Assignee: SHOWA DENKO K.K.
    Inventors: Toru Matsui, Junya Kato
  • Patent number: 11168043
    Abstract: Provided are a method and an apparatus for producing 1,2,3,4-tetrachlorobutane that are unlikely to lose 3,4-dichloro-1-butene as the material or 1,2,3,4-tetrachlorobutane as the product and can be stably and economically produce 1,2,3,4-tetrachlorobutane. A reaction liquid (1) containing 3,4-dichloro-1-butene is placed in a reaction container (11), then chlorine gas is supplied to a gas phase (2) in the reaction container (11), and the 3,4-dichloro-1-butene is reacted with the chlorine gas to give 1,2,3,4-tetrachlorobutane.
    Type: Grant
    Filed: March 1, 2019
    Date of Patent: November 9, 2021
    Assignee: SHOWA DENKO K.K.
    Inventors: Katsumi Mikami, Yohsuke Fukuchi, Shinya Oguro, Hiroshi Kobayashi
  • Publication number: 20210341103
    Abstract: A method supply equipment for supplying a fluorine gas-containing gas which includes a sealing step of introducing a second fluorine gas-containing gas having a fluorine gas concentration in a range of ±10% of that of a first fluorine gas-containing gas into a portion between a container valve (3) and a pressure regulator (7) of a pipe (4) such that a pressure is lower than the gas pressure in a filled container (2). After the sealing step, a buffer tank (9) is brought into an opened state, and then the first fluorine gas-containing gas is supplied from the filled container (2) to the portion between the container valve (3) and the pressure regulator (7) of the pipe (4). Thereafter, the pressure regulator (7) is brought into an opened state, and then the first fluorine gas-containing gas is supplied to consumption equipment (20) while regulating a pressure by the pressure regulator (7).
    Type: Application
    Filed: July 30, 2019
    Publication date: November 4, 2021
    Applicant: SHOWA DENKO K.K
    Inventor: Yuya NISHIO
  • Publication number: 20210340457
    Abstract: A fluorine-containing ether compound represented by formula (1) shown below. R4—CH2—R3—CH2—R2—CH2—R1—CH2—R2—CH2—R3—CH2—R4??(1) (In formula (1), R1 and R3 represent different perfluoropolyether chains, R2 represents a linking group containing one or more polar groups, and R4 represents a terminal group containing two or more polar groups.
    Type: Application
    Filed: November 24, 2017
    Publication date: November 4, 2021
    Applicant: SHOWA DENKO K.K.
    Inventors: Naoya FUKUMOTO, Yuta YAMAGUCHI, Naoko ITO, Katsumi MUROFUSHI
  • Patent number: 11164751
    Abstract: An etching method capable of controlling the etching rate of a silicon nitride layer and the etching rate of a silicon oxide layer to be approximately equal to each other. A body to be treated including a laminated film (5) having silicon oxide layers (2) and silicon nitride layers (3) laminated on top of each other is treated with an etching gas containing a halocarbon compound containing carbon, bromine, and fluorine. Then, the silicon oxide layer (2) and the silicon nitride layer (3) are etched at approximately equal etching rates.
    Type: Grant
    Filed: June 1, 2018
    Date of Patent: November 2, 2021
    Assignee: SHOWA DENKO K.K.
    Inventor: Tomoyuki Fukuyo
  • Patent number: 11160744
    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: Grant
    Filed: October 5, 2018
    Date of Patent: November 2, 2021
    Assignee: SHOWA DENKO K.K.
    Inventors: Natsuno Mishina, Naoko Ito, Manami Hatano, Risa Iguchi
  • Publication number: 20210332487
    Abstract: An anode mounting member (16) of a fluorine electrolytic cell including: a plurality of stacked annular packings surrounding a sidewall of a cylindrical anode packing gland (14); a cylindrical exterior member (23) surrounding an outer periphery of the packings; and an annular fastening member (24) that fastens the plurality of packings and the exterior member (23) to the anode packing gland (14), wherein among the packings a first ceramic packing (17) is located at an end of the longitudinal direction on an electrolyte tank side, and a second resin packing (18) is adjacent to the first packing (17), central axes of the anode packing gland (14) and the exterior member (23) coincide, an inner diameter (17r) is 0.2 mm to 1.0 mm larger than an outer diameter (14R), and an outer diameter (17R) is 0.2 mm to 1.0 mm smaller than an inner diameter (23r).
    Type: Application
    Filed: June 26, 2018
    Publication date: October 28, 2021
    Applicant: SHOWA DENKO K.K.
    Inventors: Yohsuke FUKUCHI, Nozomi INOUE, Hiroshi KOBAYASHI
  • Patent number: 11154902
    Abstract: To provide: a transparent conductive substrate containing silver nanowires and having excellent optical characteristics, electrical characteristics and light resistance; and a method for producing the same. A transparent conductive substrate characterized by comprising: a substrate; a transparent conductive film formed on at least one principal surface of the substrate, and containing a binder resin and conductive fibers; and a protective film formed on the transparent conductive film, wherein the thermal decomposition starting temperature of the binder resin is 210° C. or higher, and the protective film is a thermal-cured film obtained using a thermosetting resin.
    Type: Grant
    Filed: November 29, 2017
    Date of Patent: October 26, 2021
    Assignee: SHOWA DENKO K.K.
    Inventors: Masahiko Toba, Eri Nakazawa, Shigeru Yamaki
  • Publication number: 20210317551
    Abstract: Provided is an aluminum alloy member for forming a fluoride film thereon, the fluoride film being excellent in smoothness without occurrence of a black dot-shaped bulged portion and excellent in corrosion resistance against corrosive gas and plasma, etc. The aluminum alloy member for forming a fluoride film thereon 1 for use in a semiconductor producing apparatus consists of Si: 0.3 mass % to 0.8 mass %; Mg: 0.5 mass % to 5.0 mass %; Fe: 0.05 mass % to 0.5 mass %; Cu: 0 mass % or more and 0.5 mass % or less; Mn: 0 mass % or more and 0.30 mass % or less; Cr: 0 mass % or more and 0.30 mass % or less 0.5 mass % or less; and the balance being Al and inevitable impurities. When an average major diameter of a Fe-based crystallized product in the aluminum alloy member is D (?m), and an average crystalline particle diameter in the aluminum alloy member is Y (?m), a relation expression of log10 Y?0.320D+4.60 is satisfied.
    Type: Application
    Filed: April 19, 2019
    Publication date: October 14, 2021
    Applicant: SHOWA DENKO K.K.
    Inventor: Isao MURASE
  • Publication number: 20210317390
    Abstract: Provided is a composition having high affinity for the surface of an adhesive, and excellent long-term storage stability. This composition comprises: a quaternary alkylammonium fluoride or a hydrate of a quaternary alkylammonium fluoride; and an aprotic solvent, wherein the aprotic solvent includes (A) an N-substituted amide compound having 4 or more carbon atoms and not containing active hydrogen on a nitrogen atom, and (B) an ether compound.
    Type: Application
    Filed: September 26, 2019
    Publication date: October 14, 2021
    Applicant: SHOWA DENKO K.K.
    Inventors: Susumu NAKAZAKI, Kuniaki MIYAHARA, Tomoyuki FUKUYO
  • Publication number: 20210309520
    Abstract: A nitrous oxide purification method includes a step of performing gas separation by introducing a mixed gas containing nitrous oxide into a gas separation membrane including a polymer material to cause nitrous oxide to selectively permeate the gas separation membrane.
    Type: Application
    Filed: September 12, 2019
    Publication date: October 7, 2021
    Applicant: SHOWA DENKO K.K.
    Inventor: Hideyuki KURIHARA
  • Publication number: 20210310138
    Abstract: An anode for electrolytic synthesis (3) for electrolytically synthesizing fluorine gas. The anode includes an anode substrate (31) formed of a metallic material and a carbonaceous layer (33) formed of a carbonaceous material and arranged on the surface of the anode substrate (31). The metallic material is an iron-based alloy containing iron and nickel. Also disclosed is a method for producing fluorine gas using the anode for electrolytic synthesis.
    Type: Application
    Filed: July 29, 2019
    Publication date: October 7, 2021
    Applicant: SHOWA DENKO K.K.
    Inventors: Yohsuke FUKUCHI, Shinya OGURO, Hiroshi KOBAYASHI
  • Publication number: 20210309861
    Abstract: A method of manufacturing a silicon-containing oxide-coated aluminum nitride particle; a method of manufacturing a heat dispersing resin composition containing the silicon-containing oxide-coated aluminum nitride particle; and the silicon-containing oxide-coated aluminum nitride particle. The method of manufacturing includes: a first step of covering the surface of the aluminum nitride particle with an organic silicone compound including a specific structure; and a second step of heating the aluminum nitride particle covered with the organic silicone compound at a temperature of 300° C. or more and less than 1000° C., wherein the content of carbon atoms in the silicon-containing oxide-coated aluminum nitride particle is less than 1000 ppm by mass.
    Type: Application
    Filed: August 23, 2019
    Publication date: October 7, 2021
    Applicant: SHOWA DENKO K.K.
    Inventors: Yuki OTSUKA, Hidetoshi OKAMOTO, Naoki MINORIKAWA
  • Patent number: 11136657
    Abstract: An aluminum alloy plastic worked article including a plastic worked portion formed of a thinned portion 22 formed by plastic working and rib portions 21 formed at two ends of this thinned portion 22 having an approximately H-shaped or U-shaped cross-section. The plastic worked portion is a plastic worked portion 2 having strain portions 23 in each of which an equivalent strain of up to 4.0 mm/mm generated by plastic working is present, and the strain portions 23 are each located in the vicinity of the surface of the plastic worked portion 2 at a boundary between the thinned portion 22 and each of the rib portions 21 and are each formed of a non-recrystalline texture N of aluminum which is not recrystallized or formed of the non-recrystalline texture N and a fine crystalline texture M which is recrystallized but has a crystal grain of 500 ?m or less.
    Type: Grant
    Filed: June 10, 2019
    Date of Patent: October 5, 2021
    Assignee: SHOWA DENKO K.K.
    Inventor: Hideki Takemura
  • Patent number: 11136298
    Abstract: This method for producing a fullerene derivative is a method for producing a fullerene derivative having a partial structure shown by formula (1) by reacting a predetermined halogenated compound and two carbon atoms adjacent to each other for forming a fullerene skeleton in a mixed solvent of an aromatic solvent and an aprotic polar solvent having a C?O or S?O bond in the presence of at least one metal selected from the group comprising manganese, iron, and zinc; (in formula (1), C* are each carbon atoms adjacent to each other for forming a fullerene skeleton, A is a linking group having 1-4 carbon atoms for forming a ring structure with two C*, in which a portion thereof may be a substituted or condensed group).
    Type: Grant
    Filed: November 12, 2019
    Date of Patent: October 5, 2021
    Assignees: SHOWA DENKO K.K., MITSUBISHI CORPORATION
    Inventors: Tienan Jin, Weili Si, Yoshinori Yamamoto, Takeshi Igarashi
  • Patent number: 11136432
    Abstract: The present invention relates to (i) a method of producing a conductive polymer, comprising polymerizing at least one of compounds (A1) represented by the formula (1) disclosed in the specification in the presence of a compound (B) having sulfo group; (ii) a method of producing a conductive polymer, comprising polymerizing at least one compound selected from a group consisting of at least one compound (A2) represented by the formula (2); and (iii) a method of producing a conductive polymer, comprising copolymerizing at least one compound (A1) and at least one compound selected from a group consisting of at least one compound (A2). The method of the present invention is a method for producing a one-liquid type conductive polymer in which it is possible to easily adjust the solvent affinity, the solubility, and other such aspects of performance according to the purpose.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: October 5, 2021
    Assignee: SHOWA DENKO K.K.
    Inventors: Takeshi Kawamoto, Yuka Niimi
  • Publication number: 20210301383
    Abstract: A method of producing an Al—Mg—Si-based aluminum alloy forged product, includes a solution heat treatment step of performing a solution heat treatment for heating the forged product obtained in the forging step at a temperature rising rate of 5.0° C./min or more from 20° C. to 500° C. and holding the forged product at 530° C. to 560° C. for 0.3 hours to 3 hours, a quench treatment step of quenching the forged product in a water tank by bringing an entire surface of the forged product into contact with quenching water within 5 seconds to 60 seconds after the solution heat treatment step for more than 5 minutes and not more than 40 minutes, and an aging treatment step of performing an aging treatment by heating the forged product after the quench treatment step at a temperature of 180° C. to 220° C. for 0.5 hours to 1.5 hours.
    Type: Application
    Filed: March 10, 2021
    Publication date: September 30, 2021
    Applicant: SHOWA DENKO K.K.
    Inventor: Takuya ARAYAMA
  • Publication number: 20210299635
    Abstract: A liquid chromatography packing material which includes a polymer packing material into which 1.50 mmol or more of carboxyl groups are introduced per 1 g of the packing material, and an index indicating pH of the surface of the polymer packing material as determined by hydrophilic interaction chromatography (HILIC) is 1.30 or more and the index indicating hydrophilicity of the surface of the polymer packing material as determined by a hydrophilic interaction chromatography (HILIC) is from 1.00 to 1.30.
    Type: Application
    Filed: August 10, 2017
    Publication date: September 30, 2021
    Applicant: SHOWA DENKO K.K.
    Inventor: Hideyuki KONDO