Patents Assigned to Ube Material Industries, Ltd.
  • Publication number: 20230192504
    Abstract: This magnesium oxide powder contains secondary particles in which a plurality of primary particles of magnesium oxide having a crystal phase and a grain boundary phase are at least partially fused together by the grain boundary phase, and a median diameter obtained by a laser diffraction scattering method is 300 µm or less.
    Type: Application
    Filed: December 1, 2021
    Publication date: June 22, 2023
    Applicant: Ube Material Industries, Ltd.
    Inventors: Isamu Fujikawa, Masamichi Nakagawa, Takashi Hamaoka, Takeshi Himoto, Seiji Yamaguchi, Kunio Watanabe
  • Publication number: 20230167267
    Abstract: The degradation promoter for an aliphatic polyester biodegradable resin according to the present invention contains basic magnesium sulfate.
    Type: Application
    Filed: March 1, 2021
    Publication date: June 1, 2023
    Applicant: Ube Material Industries, Ltd.
    Inventors: Tetsuo Takayama, Toru Inagaki, Yuzo Kato
  • Publication number: 20230037525
    Abstract: The biodegradable resin composition according to the present invention contains an aliphatic polyester biodegradable resin and fibrous basic magnesium sulfate.
    Type: Application
    Filed: March 1, 2021
    Publication date: February 9, 2023
    Applicant: Ube Material Industries, Ltd.
    Inventors: Tetsuo Takayama, Toru Inagaki, Yuzo Kato
  • Publication number: 20220153990
    Abstract: A polycarbonate resin composition includes: 50 to 90% by mass of polycarbonate resin (A); 2 to 30% by mass of acrylonitrile-butadiene-styrene copolymer resin (B); 5 to 40% by mass of at least one basic magnesium sulfate (C) selected from fibrous basic magnesium sulfate (C-1) and fan-shaped basic magnesium sulfate (C-2); 0.1 to 8% by mass of at least one (D) selected from a fatty acid metal salt and a fatty acid; and 1 to 20% by mass of elastomer (E).
    Type: Application
    Filed: March 17, 2020
    Publication date: May 19, 2022
    Applicants: Ube Material Industries, Ltd., NATIONAL UNIVERSITY CORPORATION YAMAGATA UNIVERSITY
    Inventors: Tetsuo Takayama, Yuzo Kato, Toru Inagaki
  • Publication number: 20210332237
    Abstract: The polycarbonate resin composition according to the present invention includes: 50 to 90% by mass of polycarbonate resin (A); 2.0 to 20% by mass of olefin polymer (B); 5 to 40% by mass of basic magnesium sulfate (C) selected from fibrous basic magnesium sulfate (C-1) and fan-shaped basic magnesium sulfate (C-2); 0.1 to 8% by mass of at least one (D) selected from a fatty acid metal salt and a fatty acid; and 1 to 20% by mass of elastomer (E).
    Type: Application
    Filed: December 25, 2019
    Publication date: October 28, 2021
    Applicants: Ube Material Industries, Ltd., NATIONAL UNIVERSITY CORPORATION YAMAGATA UNIVERSITY
    Inventors: Tetsuo Takayama, Yuzo Kato, Toru Inagaki
  • Publication number: 20200377693
    Abstract: A basic magnesium sulfate powder according to the present invention has a surface at least partially coated with an inorganic phosphorus compound. The basic magnesium sulfate powder preferably has a phosphorus content of from 0.001 to 5.0 mass %.
    Type: Application
    Filed: July 24, 2019
    Publication date: December 3, 2020
    Applicant: Ube Materials Industries, Ltd.
    Inventors: Toru Inagaki, Kazuki Yoshihara, Ryoichi Nomura, Kaoru Takazaki, Yuzo Kato
  • Publication number: 20200246864
    Abstract: A magnesium oxide powder has: a median diameter (D50) of 5 to 100 ?m; a MgO purity of 98% by mass or more; a Ca compound content of 2% by mass or less in terms of CaO; and when the magnesium oxide powder is immersed in pure water and allowed to stand at 95° C. for 24 hours, a mass ratio of calcium ions to magnesium ions, Ca/Mg, in an aqueous solution of 10 or less.
    Type: Application
    Filed: November 5, 2018
    Publication date: August 6, 2020
    Applicant: Ube Materials Industries, Ltd.
    Inventors: Naoto Nishida, Koji Nakamura, Takashi Arase
  • Publication number: 20180044530
    Abstract: To provide magnesium oxide which is excellent in hydration resistance and hardly causes volume expansion due to hydration and the like, a resin composition containing the same, and a method for producing the magnesium oxide powder. Magnesium oxide powder having a coating layer mainly comprising basic magnesium carbonate in the surface layer, when the amounts of substances of water vapor and carbon dioxide among the gas generated by thermal decomposition at 50 to 500° C. are respectively designated as m-H2O and m-CO2, in a heating evolved gas analysis (EGA-MS) method, the molar fraction represented by m-CO2/(m-H2O+m-CO2) being within the range of 0.3 to 0.6.
    Type: Application
    Filed: March 2, 2016
    Publication date: February 15, 2018
    Applicant: Ube Material Industries, Ltd.
    Inventors: Naoto Nishida, Tatsuki Okutsu, Naoki Funabashi, Akira Yoshida
  • Publication number: 20170096562
    Abstract: A fine magnesium oxide particle dispersion liquid containing an aprotic solvent, and fine magnesium oxide particles that are dispersed in the aprotic solvent, wherein the dispersion liquid has D50 of 200 nm or less in a particle size distribution as measured by a dynamic light scattering method, and has a content rate of coarse particles having an average particle diameter of 500 nm or more of less than 1%, and a method for producing the fine magnesium oxide particle dispersion liquid.
    Type: Application
    Filed: March 23, 2015
    Publication date: April 6, 2017
    Applicant: Ube Materials Industries, Ltd.
    Inventors: Seiji Noguchi, Yuzo Kato, Masayuki Fujimoto
  • Publication number: 20160222273
    Abstract: A thermally conductive resin filler including a sintered body containing at least magnesium oxide, calcium oxide, and silicon oxide, the thermally conductive filler being characterized in that, when the molar number of calcium element contained in the total composition of the sintered body in terms of calcium oxide (CaO) is defined as MCa, and the molar number of silicon element contained in the total composition of the sintered body in terms of silicon oxide (SiO2) is defined as MSi, the molar ratio of the calcium oxide (CaO) to the silicon oxide (SiO2) represented by MCa/MSi is in the range of 0.1 or more and less than 2.0.
    Type: Application
    Filed: September 10, 2014
    Publication date: August 4, 2016
    Applicant: Ube Materials Industries, Ltd.
    Inventors: Naoto Nishida, Seiji Yamaguchi, Akira Yoshida, Satoshi Shimmatsu
  • Patent number: 9187338
    Abstract: Acicular strontium carbonate particles are manufactured by introducing gaseous carbon dioxide into an aqueous solution or suspension of strontium hydroxide having a concentration of 1 to 20 wt. %, at a flow rate of 0.5 to 200 mL/min., relative to one gram of the strontium hydroxide, while stirring the solution or suspension in the presence of a dicarboxylic acid, in which the dicarboxylic acid comprises a divalent linear hydrocarbon group having one to four carbon atoms and carboxyl group bonded to each terminals, with the proviso that the linear hydrocarbon group may be substituted with one or more C1-6 alkyl groups, and thus carbonating the strontium hydroxide.
    Type: Grant
    Filed: February 15, 2012
    Date of Patent: November 17, 2015
    Assignee: Ube Material Industries, Ltd.
    Inventors: Fumio Okada, Takeshi Himoto, Masayuki Fujimoto
  • Patent number: 9117981
    Abstract: A silicate phosphor having a coating layer comprising a fluorine-containing compound on its surface which is obtained by a method of heating a mixture of 100 weight parts of a silicate phosphor and 0.5-15 weight parts of ammonium fluoride at a temperature in the range of 200 to 600° C. exhibits high light emission intensity and high moisture resistance.
    Type: Grant
    Filed: November 22, 2011
    Date of Patent: August 25, 2015
    Assignee: UBE Material Industries, Ltd.
    Inventors: Kouichi Fukuda, Jin Amagai, Seiji Noguchi, Toru Inagaki, Masaki Tanaka
  • Patent number: 9011718
    Abstract: The emission strength of a light released from a blue light-emitting phosphor having a merwinite crystal structure and an elemental formula of (Sr,Ca)3MgSi2O8 activated with Eu in which a molar ratio of Sr and Ca is in the range of 1:0.10 to 1:0.30 is stable in a wide temperature range.
    Type: Grant
    Filed: September 25, 2012
    Date of Patent: April 21, 2015
    Assignee: Ube Material Industries, Ltd.
    Inventors: Kouichi Fukuda, Jin Amagai, Seiji Noguchi, Toru Inagaki, Masaki Tanaka
  • Patent number: 8956554
    Abstract: A green light-emitting silicate phosphor comprising Eu-activated strontium barium silicate which has a crystal phase of magnesium oxide or a merwinite crystal phase and contains 0.15 to 0.90 mol of magnesium per one mol of silicon gives a light emission stable at elevated temperatures.
    Type: Grant
    Filed: December 28, 2012
    Date of Patent: February 17, 2015
    Assignee: Ube Materials Industries, Ltd.
    Inventors: Kouichi Fukuda, Jin Amagai, Toru Inagaki
  • Patent number: 8883309
    Abstract: A blue light-emitting silicate phosphor favorably employable as a blue light-emitting source of a light-emitting apparatus which gives emission of a visible light upon irradiation of ultraviolet rays having a wavelength of 254 nm, such as ultraviolet rays emitted by a fluorescent lamp is produced by a method comprising calcining a powdery mixture comprising a magnesium oxide powder, an MeO source powder, a EuO source powder and a SiO2 source powder, said magnesium oxide powder having a purity of 99.9 wt. % or higher and a BET specific surface area in the range of 3 to 60 m2/g and having been prepared by bringing a metallic magnesium vapor into contact with oxygen whereby oxidizing the metallic magnesium vapor.
    Type: Grant
    Filed: April 14, 2011
    Date of Patent: November 11, 2014
    Assignee: Ube Material Industries, Ltd.
    Inventors: Toru Inagaki, Masato Yamauchi, Seiji Noguchi, Kouichi Fukuda, Akira Ueki
  • Patent number: 8785535
    Abstract: A fibrous basic magnesium sulfate powder which does not contain CO2 in an amount of more than 0.15% by mass, or a fibrous basic magnesium sulfate powder which has a ratio of the infrared absorption within the wave number range of 1,400-1,440 cm?1 relative to the infrared absorption within the wave number range of 3,180-3,530 cm?1 of 0.005 or less. The fibrous basic magnesium sulfate powders exhibit improved physical property-improving effect when dispersed in a resin material.
    Type: Grant
    Filed: March 2, 2012
    Date of Patent: July 22, 2014
    Assignee: Ube Material Industries, Ltd.
    Inventors: Ryoichi Nomura, Tatsuki Okutsu
  • Patent number: 8704439
    Abstract: A blue light-emitting phosphor having an elemental formula of Sr3-xMgSi2O8:Eux (wherein x represents a value in the range of 0.008 to 0.110), a merwinite crystal structure and a crystal lattice strain of 0.080% or less as determined from an X-ray diffraction pattern at diffraction angle 2? of 20-130° by the Le Bail method, wherein the X-ray diffraction pattern is determined using a CuK? ray having an incident angle of ?, is used advantageously as a blue light-emitting material for a light-emitting device which comprises a semiconductor light-emitting element capable of emitting a light having a wavelength of 350-430 nm upon application of an electrical current, such as a white light-emitting LED lamp, and a blue light-emitting material capable of emitting a blue light upon excitation with a light emitted by the semiconductor light-emitting element.
    Type: Grant
    Filed: September 7, 2011
    Date of Patent: April 22, 2014
    Assignee: Ube Material Industries, Ltd.
    Inventors: Toru Inagaki, Masato Yamauchi, Seiji Noguchi, Kouichi Fukuda, Akira Ueki
  • Patent number: 8454933
    Abstract: The invention provides a polycrystal magnesium oxide (MgO) sintered body which is capable of having a sintered density close to a theoretical density thereof. The MgO sintered body exhibits excellent mechanical properties and heat conductivity, while reducing contamination of an atmosphere due to gas generation. The invention also provides a production method for the sintered body. The polycrystal MgO sintered body has a unique crystalline anisotropy in which (111) faces are oriented along a surface applied with a uniaxial pressure at a high rate. The polycrystalline MgO sintered body is obtained by a method which includes the steps of: sintering an MgO raw material powder, having a particle size of 1 ?m or less, under a uniaxial pressure and then subjecting the sintered powder to a heat treatment under an atmosphere containing 0.05 volume % or more of oxygen, at a temperature of 1273 K or more for 1 minute or more.
    Type: Grant
    Filed: January 27, 2009
    Date of Patent: June 4, 2013
    Assignees: Nippon Tungsten Co., Ltd., Ube Material Industries, Ltd.
    Inventors: Mitsuyoshi Nagano, Masanobu Takasu, Yo Arita, Satoru Sano
  • Patent number: 8388749
    Abstract: A fine strontium carbonate powder having a BET specific surface area of 20 to 150 m2/g, which comprises spherical particles having a mean aspect ratio of 2.0 or less shows high dispersibility in liquid media and is of value for producing dielectric ceramic materials such as strontium titanate.
    Type: Grant
    Filed: October 28, 2010
    Date of Patent: March 5, 2013
    Assignee: Ube Material Industries, Ltd.
    Inventors: Fumio Okada, Takeshi Himoto
  • Patent number: 8388915
    Abstract: A method for producing basic magnesium sulfate granules, by heating a water-containing granular composition to a temperature of 50-250° C. to dryness. The granular composition has a water content of 10-60 wt. % and comprises fibrous basic magnesium sulfate particles, magnesium hydroxide in an amount of 5-300 weight parts per 100 weight parts of the fibrous basic magnesium sulfate particles, magnesium sulfate in an amount of 0.1-200 weight parts per 100 weight parts of a total amount of the fibrous basic magnesium sulfate particles and magnesium hydroxide. This method can give basic magnesium sulfate granules having a low bulk density and a high crushing strength.
    Type: Grant
    Filed: March 30, 2009
    Date of Patent: March 5, 2013
    Assignee: Ube Material Industries, Ltd.
    Inventors: Shinichi Yamamoto, Takashi Kishimoto