Patents Assigned to Tokuyama Corporation
  • Publication number: 20200199371
    Abstract: This surface-treated sol-gel silica is characterized by containing sol-gel silica having an average particle size of 0.05 ?m or more and 2.0 ?m or less as measured by laser diffraction scattering and a surface treatment agent on the surface of the sol-gel silica. In a dispersion produced by dispersing 5 mass % of the sol-gel silica in ethanol by emitting ultrasonic waves at 40W for 10 minutes, the content of particles with particle sizes of 5 ?m or more is 10 ppm or less in a particle number size distribution obtained by a Coulter counter method.
    Type: Application
    Filed: August 29, 2018
    Publication date: June 25, 2020
    Applicant: TOKUYAMA CORPORATION
    Inventors: Hiromasa FUJIOKA, Osamu TANAKA, Hiroaki TAIRA, Naoki MIKAMI, Toshiaki OOTANI
  • Patent number: 10690943
    Abstract: To provide a laminate comprising a pair of polycarbonate optical sheet or film which are laminated together through a polarizing film layer and an adhesive layer of a photochromic composition comprising (I) a polyurethane urea resin and (II) a photochromic compound and having excellent photochromic properties, adhesion, heat resistance, perspiration resistance and excellent adhesion to a lens substrate.
    Type: Grant
    Filed: December 22, 2016
    Date of Patent: June 23, 2020
    Assignee: TOKUYAMA CORPORATION
    Inventors: Katsuhiro Mori, Toshimitsu Hiraren, Manami Oshio
  • Patent number: 10689349
    Abstract: In the method, a trione compound represented by the following formula (1) is (i) reduced by NaAlH2(OCH2CH2OCH3)2 and subsequently further reduced by a metal borohydride salt, or (ii) reduced by calcium borohydride, thereby producing an amide alcohol compound represented by the following formula (3) (wherein, R1 and R2 may be the same or different and each represents a hydrogen atom or a protecting group of an ureylene group; R4 represents an alkyl group, an aralkyl group, or an aryl group; and each of R5, R6, and R7 represents a hydrogen atom, an alkyl group, an alkoxy group, or a halogen atom).
    Type: Grant
    Filed: July 26, 2017
    Date of Patent: June 23, 2020
    Assignee: Tokuyama Corporation
    Inventors: Fumiaki Iwasaki, Hiromasa Yamamoto, Kenji Tanaka, Masahiko Seki, Yoshiki Seike
  • Publication number: 20200190106
    Abstract: A chromene compound having at least one indenonaphthopyran moiety which has a group forming a spiro ring together with the 13-position carbon atom and further an oligomer chain group selected from a polyalkylene oxide oligomer chain group having at least three recurring units and a polyester oligomer chain group having at least three recurring units, represented by the following formula and having reduced matrix dependence: wherein R1 and R2 are each a group which may have an oligomer chain group, the ring Z bonded to the 13-position carbon atom of the chromene compound is a Spiro ring group, and R3 and R4 are each an aryl group or heteroaryl group which may have an oligomer chain group. Preferably, the chromene compound has at least one oligomer chain group in the molecule.
    Type: Application
    Filed: July 11, 2018
    Publication date: June 18, 2020
    Applicant: TOKUYAMA CORPORATION
    Inventors: Masayuki MIYAZAKI, Junji TAKENAKA
  • Publication number: 20200172681
    Abstract: A photochromic polyrotaxane compound which comprises an axial molecule and a plurality of cyclic molecules clathrating the axial molecule, wherein at least one side chain containing a photochromic moiety is bonded to at least one of the cyclic molecules, and a curable composition comprising the photochromic polyrotaxane compound and a polymerizable compound.
    Type: Application
    Filed: June 18, 2018
    Publication date: June 4, 2020
    Applicant: TOKUYAMA CORPORATION
    Inventors: Junji TAKENAKA, Junji MOMODA, Takayoshi KAWASAKI, Takao NOGUCHI, Yasutomo SHIMIZU, Masayuki MIYAZAKI
  • Patent number: 10640385
    Abstract: A core wire holder 3 attached on an electrode 2 placed on a bottom panel of a device 20 for producing silicon by Siemens process includes a silicon core wire holding portion 9 being generally circular truncated cone-shaped, and holding and energizing a silicon core wire 4. The silicon core wire holding portion 9 includes a generally circular truncated cone having an upper surface formed with a silicon core wire insertion hole 7 for holding the silicon core wire 4, and the silicon core wire holding portion 9 includes an upper surface and a side surface, which form a ridge having a curved surface and serving as a chamfered portion 8.
    Type: Grant
    Filed: October 30, 2015
    Date of Patent: May 5, 2020
    Assignee: TOKUYAMA CORPORATION
    Inventor: Haruyuki Ishida
  • Publication number: 20200107523
    Abstract: A teat opening protection Patch is stuck to portions inclusive of the teat openings of livestock, and includes a laminate 1 of an elastic sheet 2 and an adhesive layer 3 laminated on one surface of the elastic sheet 2, the laminate 1 having a double-stretched tensile stress in a range of 0.1 to 5 N.
    Type: Application
    Filed: October 8, 2019
    Publication date: April 9, 2020
    Applicant: TOKUYAMA CORPORATION
    Inventors: Yoji INUI, Hitoshi KONDO, Katsuhiro SHIRAI
  • Publication number: 20200029531
    Abstract: A teat opening protection patch is stuck to portions inclusive of the teat openings of livestock, and includes a laminate 1 of an elastic sheet 2 and an adhesive layer 3 laminated on one surface of the elastic sheet 2, the laminate 1 having a double-stretched tensile stress in a range of 0.1 to 5 N.
    Type: Application
    Filed: October 8, 2019
    Publication date: January 30, 2020
    Applicant: TOKUYAMA CORPORATION
    Inventors: Yoji INUI, Hitoshi KONDO, Katsuhiro SHIRAI
  • Patent number: 10531640
    Abstract: A teat opening protection patch is stuck to portions inclusive of the teat openings of livestock, and includes a laminate 1 of an elastic sheet 2 and an adhesive layer 3 laminated on one surface of the elastic sheet 2, the laminate 1 having a double-stretched tensile stress in a range of 0.1 to 5 N.
    Type: Grant
    Filed: February 16, 2017
    Date of Patent: January 14, 2020
    Assignee: TOKUYAMA CORPORATION
    Inventors: Yoji Inui, Hitoshi Kondo, Katsuhiro Shirai
  • Publication number: 20200010362
    Abstract: A process for producing a modified fly ash comprising the steps of providing, as a raw material, the raw fly ash discharged from a pulverized coal combustion boiler; classifying the raw fly ash into a crude powder and a fine powder; removing the unburned carbon contained in the crude powder by heating the crude powder at a temperature in a range of 500 to 1000° C.; and mixing together the crude powder from which the unburned carbon has been removed and the fine powder to obtain a modified fly ash.
    Type: Application
    Filed: March 19, 2018
    Publication date: January 9, 2020
    Applicant: TOKUYAMA CORPORATION
    Inventors: Kohei OMURA, Takuya SEKI, Hiroyoshi KATO
  • Publication number: 20200010327
    Abstract: A method for producing a polycrystalline silicon processed article includes removing a polycrystalline silicon rod, obtained by precipitating polycrystalline silicon on a silicon core wire held by a carbon member connected to an electrode in a reactor by the Siemens method, in a state in which the carbon member is included at the end portion thereof and processing the polycrystalline silicon rod. The polycrystalline silicon rod is detached from the electrode and the carbon member present on the end portion of the polycrystalline silicon rod is covered using a covering material until the processing, whereby the polycrystalline silicon rod and the carbon member are handled in a separated state.
    Type: Application
    Filed: March 7, 2018
    Publication date: January 9, 2020
    Applicant: Tokuyama Corporation
    Inventor: Ayao AKIYOSHI
  • Patent number: 10526533
    Abstract: A process for producing a photochromic cured body by curing a photochromic composition comprising (A) a polyiso(thio)cyanate compound having at least two isocyanate groups and/or isothiocyanate groups in one molecule, a poly(thi)ol compound having at least two hydroxyl groups and/or thiol groups in one molecule, (C) a mono(thi)ol compound having one hydroxy group or thiol group in one molecule, and a photochromic compound.
    Type: Grant
    Filed: March 8, 2016
    Date of Patent: January 7, 2020
    Assignee: TOKUYAMA CORPORATION
    Inventors: Yasutomo Shimizu, Katsuhiro Mori, Junji Momoda
  • Patent number: 10518964
    Abstract: A package in which a bag formed from a polyethylene-based resin film having a small thickness, more specifically a thickness of 300 ?m or less is filled with crushed polysilicon (Si chunks) and damage to the bag by the Si chunks is effectively prevented. In a polysilicon package in which the bag 1 formed from a polyethylene-based resin having an average thickness of 300 ?m or less is filled with the Si chunks 4, the bag 1 has a heat-sealed bonded part 2 at the bottom and is filled with the Si chunks 4 to ensure that the maximum expansion of the bag 1 becomes 5% or less when the bag 1 is held in an upright state with the bottom as a ground contact surface.
    Type: Grant
    Filed: September 18, 2015
    Date of Patent: December 31, 2019
    Assignee: TOKUYAMA CORPORATION
    Inventors: Satoko Yoshimura, Takuya Asano
  • Publication number: 20190389725
    Abstract: An aluminum nitride powder containing a very small amount of coarse particles. An aluminum nitride powder which provides a resin composition having high affinity for resins and high moisture resistance. The aluminum nitride powder has a volume average particle diameter D50 of 0.5 to 7.0 ?m in particle size distribution measured with a laser diffraction scattering particle size distribution meter, a D90/D50 ratio of 1.3 to 3.5 and a BET specific surface area of 0.4 to 6.0 m2/g and classified by removing coarse particles whose particle diameter is more than 5 times as large as D90. When resin paste obtained from this aluminum nitride powder and a resin is measured with a grind gauge, the upper limit particle diameter at which a streak is produced is not more than 5 times as large as D90.
    Type: Application
    Filed: March 6, 2018
    Publication date: December 26, 2019
    Applicant: TOKUYAMA CORPORATION
    Inventors: Yoshitaka Inaki, Yasushi Imoto, Yasuyuki Yamamoto, Masataka Himeno
  • Publication number: 20190391126
    Abstract: Provided is an analysis method capable of qualitatively determining resins adhering to crushed polysilicon with high sensitivity and further capable of quantitatively determining the resins with high precision. The analysis method comprises removing organic volatile components from crushed polysilicon by heating, then raising a temperature of the crushed polysilicon in a stream of an inert gas, collecting resin decomposition products produced at the heating temperature, and analyzing decomposition products unique to the resins, to thereby identify the types of the resins adhering to the crushed polysilicon. Moreover, it is also possible to prepare a standard curve regarding each of the decomposition products unique to the resins and to determine an adhesion quantity of each of the adhering resins based on the standard curve.
    Type: Application
    Filed: December 14, 2017
    Publication date: December 26, 2019
    Applicant: Tokuyama Corporation
    Inventors: Manato NAMEKAWA, Mikie TAKEMOTO
  • Publication number: 20190382352
    Abstract: In the method, a trione compound represented by the following formula (1) is (i) reduced by NaAlH2(OCH2CH2OCH3)2 and subsequently further reduced by a metal borohydride salt, or (ii) reduced by calcium borohydride, thereby producing an amide alcohol compound represented by the following formula (3) (wherein, R1 and R2 may be the same or different and each represents a hydrogen atom or a protecting group of an ureylene group; R4 represents an alkyl group, an aralkyl group, or an aryl group; and each of R5, R6, and R7 represents a hydrogen atom, an alkyl group, an alkoxy group, or a halogen atom).
    Type: Application
    Filed: July 26, 2017
    Publication date: December 19, 2019
    Applicant: Tokuyama Corporation
    Inventors: Fumiaki IWASAKI, Hiromasa YAMAMOTO, Kenji TANAKA, Masahiko SEKI, Yoshiki SEIKE
  • Patent number: 10508035
    Abstract: Aluminum nitride crystal particles, aluminum nitride powders containing the same, production processes for both of them, an organic polymer composition comprising the aluminum nitride crystal particles and a sintered body. Each of the aluminum nitride crystal particles has a flat octahedral shape in a direction where hexagonal faces are opposed to each other, which is composed of two opposed hexagonal faces and 6 rectangular faces, in which the average distance “D” between two opposed corners of each of the hexagonal faces is 3 to 110 ?m, the length “L” of the short side of each of the rectangular faces is 2 to 45 ?m, and L/D is 0.05 to 0.8; each of the hexagonal faces and each of the rectangular faces cross each other to form a curve without forming a single ridge; and the true destiny is 3.20 to 3.26 g/cm3.
    Type: Grant
    Filed: February 6, 2014
    Date of Patent: December 17, 2019
    Assignee: TOKUYAMA CORPORATION
    Inventors: Yutaka Fukunaga, Yukihiro Kanechika, Meng Wang, Ken Sugawara
  • Patent number: 10494488
    Abstract: The present invention provides an optical composition from which an optical article having reduced poor appearance such as cloudiness and optical strain during lens base material production can be obtained, and when a photochromic compound is added, a photochromic cured body having excellent photochromism and mechanical strength can also be formed, and a polyrotaxane used therefor. The polyrotaxane has a composite molecular structure formed of an axle molecule and a plurality of cyclic molecules clathrating the axle molecule, satisfying at least one of (X) and (Y). (X): A side chain having a secondary or tertiary hydroxyl group is introduced into at least part of the cyclic molecule of the polyrotaxane. (Y): A side chain having a group represented by -A (A is an organic group, and contains at least one hydroxyl group) is introduced into at least part of the cyclic molecule of the polyrotaxane, and a pKa of the hydroxyl group of the compound represented by H-A is 6 or more and less than 14.
    Type: Grant
    Filed: August 31, 2016
    Date of Patent: December 3, 2019
    Assignee: Tokuyama Corporation
    Inventors: Yasutomo Shimizu, Katsuhiro Mori, Junji Momoda, Hiromasa Yamamoto
  • Publication number: 20190352180
    Abstract: To provide a hexagonal boron nitride powder which contains agglomerates, has a maximum torque calculated by measuring in accordance with JIS-K-6217-4 of 0.20 to 0.50 Nm, a DBP absorption rate of 50 to 100 ml/100 g, a tap bulk density of 0.66 to 0.95 g/cm3 and reduced anisotropy of heat conduction and can provide high heat conductivity and dielectric strength to a resin composition produced by filling a resin therewith and a process for producing the powder by carrying out a reduction nitriding reaction using boron carbide.
    Type: Application
    Filed: December 12, 2017
    Publication date: November 21, 2019
    Applicant: TOKUYAMA CORPORATION
    Inventors: Shota DAIKI, Kyoichi FUJINAMI
  • Patent number: 10428813
    Abstract: There is provided a state-monitory system of a moving apparatus which is capable of deducing an abnormality and cause of breakdown of the moving apparatus by Equationematical analysis only by measuring vibration of a casing or object to be monitored and which requires no large-scaled apparatus. An equivalent model of the moving apparatus 1 is formed, which is adapted to replace the vibration of a monitored object of the moving apparatus 1 with the vibration of a viscoelastic member such as an elastic spring etc. and which is adapted to be capable of outputting virtual vibration data having synthesized vibration equivalent to the vibration of the viscoelastic member, and the equivalent model is Equationematically analyzed, thereby estimating the abnormality and cause of breakdown of the moving apparatus 1 only by measuring vibration of the casing 8 or a monitored object.
    Type: Grant
    Filed: November 18, 2014
    Date of Patent: October 1, 2019
    Assignees: Tokuyama Corporation, Yamaguchi University
    Inventors: Yoshifumi Mori, Takashi Saito