Patents Assigned to DENKA COMPANY LIMITED
  • HEAT RESISTANCE RESIN COMPOSITION AND INJECTION MOLDED BODY THEREOF
    Publication number: 20230265288
    Abstract: A heat resistant resin composition which does not cause stringing when performing fusion-bonding using heated plates. A heat resistant resin composition, including: a maleimide-based copolymer; and at least one resin selected from the group including: ABS resin, ASA resin, AES resin, and SAN resin; wherein: the heat resistant resin composition has a ratio G?/G? of storage modulus (G?) to loss modulus (G?) measured in accordance with JIS K 7244-10 under conditions of 240° C. at an angular velocity of 0.63 rad/s is 0.30 or more and 1.00 or less.
    Type: Application
    Filed: September 2, 2021
    Publication date: August 24, 2023
    Applicant: DENKA COMPANY LIMITED
    Inventor: Soichiro NAKANISHI
  • PHOSPHOR COATING MATERIAL, COATING FILM, PHOSPHOR BOARD, AND ILLUMINATION DEVICE
    Publication number: 20230265339
    Abstract: A phosphor coating material containing phosphor particles and a curable resin component. In the phosphor coating material, a content of the phosphor particles in all non-volatile components is equal to or more than 25 vol % and equal to or less than 60 vol %. Using the phosphor coating material, it is possible to produce a coating film (phosphor layer), a phosphor board, and an illumination device.
    Type: Application
    Filed: July 30, 2021
    Publication date: August 24, 2023
    Applicant: DENKA COMPANY LIMITED
    Inventor: Masahiro KONISHI
  • METHODS FOR RECOVERING AND PRODUCING TARGET PROTEIN
    Publication number: 20230265403
    Abstract: The present invention discloses a method for recovering a target protein expressed in an apoplast, comprising a step of injecting a buffer into a plant body that expresses the target protein in an apoplast through a stoma, a water pore, or a cross-section of the plant body; and a step of extracting a buffer present inside the plant body through a stoma, a water pore, or a cross-section.
    Type: Application
    Filed: August 5, 2021
    Publication date: August 24, 2023
    Applicant: Denka Company Limited
    Inventor: Kenichi NISHIDA
  • COVER TAPE AND ELECTRONIC COMPONENT PACKAGE
    Publication number: 20230265317
    Abstract: This cover tape has at least a base layer and a heat seal layer, wherein the heat seal layer contains a polystyrene-based resin (A) and an ethylene-(meth)acrylic acid-based copolymer (B), and contents of the component (A) and the component (B) are more than 80 parts by mass and 95 parts by mass or less and 5 parts by mass or more and less than 20 parts by mass with respect to a total of 100 parts by mass of the component (A) and the component (B).
    Type: Application
    Filed: August 18, 2021
    Publication date: August 24, 2023
    Applicant: Denka Company Limited
    Inventors: Gosuke NAKAJIMA, Keisuke NABA, Takanori ATSUSAKA, Hisatsugu TOKUNAGA
  • FIBERS FOR ARTIFICIAL HAIR AND HEADDRESS PRODUCT
    Publication number: 20230263253
    Abstract: Disclosed is a fiber for artificial hair containing a polycondensation-based polymer and a crosslinking agent. Also disclosed is a headdress article including the fiber for artificial hair.
    Type: Application
    Filed: October 27, 2020
    Publication date: August 24, 2023
    Applicant: Denka Company Limited
    Inventors: Sho HAKAMADA, Atsushi TAKEI, Takashi MURAOKA
  • ACRYLIC RUBBER, RUBBER COMPOSITION AND CROSSLINKED PRODUCT THEREOF, RUBBER HOSE, AND SEAL PART
    Publication number: 20230265228
    Abstract: An aspect of the present invention is an acrylic rubber containing only an alkyl acrylate, ethylene and a crosslinking monomer as monomer units, wherein a content of a polyvinyl alcohol in the acrylic rubber is 0.5 to 2% by mass.
    Type: Application
    Filed: July 6, 2020
    Publication date: August 24, 2023
    Applicant: Denka Company Limited
    Inventors: Tatsuya NAKANO, Toshiaki MIYAUCHI
  • Surface-treated aggregated boron nitride powder, aggregated boron nitride powder, and thermally conductive resin composition
    Patent number: 11732173
    Abstract: A surface-treated aggregated boron nitride powder is prepared by using the boron nitride powder as the raw material, adding an oxidizer to the boron nitride aggregated grains, wet-pulverizing or wet-crushing the grains for surface modification treatment of the particles and allowing reaction of the particles with a metal coupling agent. The surface-treated boron nitride aggregated grains are formed by aggregation of hexagonal h-BN primary particles; (B) have any one or more of Si, Ti, Zr, Ce, Al, Mg, Ge, Ga, and V in an amount of 0.1 atm % or more and 3.0 atm % or less in its composition on the surface of 10 nm; (C) have a crushing strength of 5 MPa or more; and (D) have an average particle diameter of 20 ?m or more and 100 ?m or less.
    Type: Grant
    Filed: January 31, 2022
    Date of Patent: August 22, 2023
    Assignee: DENKA COMPANY LIMITED
    Inventors: Go Takeda, Yoshitaka Taniguchi
  • MAGNESIUM OXIDE POWDER, FILLER COMPOSITION, RESIN COMPOSITION, AND HEAT DISSIPATION PART
    Publication number: 20230257554
    Abstract: A magnesium oxide powder containing magnesium oxide particles, wherein an average sphericity of a magnesium oxide particle having a projected area equivalent circle diameter of a particle cross section by microscopy of 10 ?m or more among the magnesium oxide particles is 0.73 or more and 0.95 or less, a proportion of a magnesium oxide particle having a sphericity of 0.65 or less among the magnesium oxide particles is 20% or less on a number basis, and a proportion of a magnesium oxide particle having a sphericity of 0.55 or less among the magnesium oxide particles is 15% or less on a number basis.
    Type: Application
    Filed: September 14, 2021
    Publication date: August 17, 2023
    Applicants: DENKA COMPANY LIMITED, TATEHO CHEMICAL INDUSTRIES CO., LTD.
    Inventors: Shuji SASAKI, Junichi NAKAZONO, Shotaro TANOUE, Yoshihisa OSAKI, Tomoaki CHIKAZAWA, Miki YAMAMOTO
  • RESIN COMPOSITION AND MOLDED RESIN ARTICLES
    Publication number: 20230250270
    Abstract: A resin composition including a maleimide copolymer (A), a graft copolymer (B), and a vinyl copolymer (C), and with respect to a total amount of 100 parts by mass of the maleimide copolymer (A), the graft copolymer (B) and the vinyl copolymer (C), a total content of the aromatic vinyl monomer unit is 55 to 65 parts by mass, a total content of the vinyl cyanide monomer unit is 15 to 27 parts by mass, a total content of the maleimide monomer unit is 3 to 15 parts by mass, and a total content of the conjugated diene monomer unit is 10 to 20 parts by mass, and the melt mass flow rate under conditions of 220° C. and a load of 98 N is 3 to 23 g/10 min.
    Type: Application
    Filed: June 8, 2021
    Publication date: August 10, 2023
    Applicant: Denka Company Limited
    Inventors: Masanori MATSUMOTO, Kohei NISHINO
  • CEMENT ADMIXTURE, EXPANSION MATERIAL, AND CEMENT COMPOSITION
    Publication number: 20230242448
    Abstract: A cement admixture containing free lime, gypsum, Ye’elimite, and ternesite, wherein the cement admixture has a mass ratio of the Ye’elimite to the ternesite (Ye?elimite/ternesite) of from 0.5 to 40. The cement admixture contains 20 to 80 mass% of the free lime. The cement admixture has a total mass ratio of the free lime and the gypsum anhydride to the ternesite ((free lime + gypsum anhydride)/ternesite) from 20 to 90. An expansive material which contains the cement admixture. A cement composition which contains the cement admixture.
    Type: Application
    Filed: April 22, 2021
    Publication date: August 3, 2023
    Applicant: DENKA COMPANY LIMITED
    Inventors: Daiki SHIMAZAKI, Taiichiro MORI
  • KIT AND METHOD
    Publication number: 20230243857
    Abstract: There is provided a kit that is used for fractionation of cholesterol (lipoprotein C) in a lipoprotein other than small dense LDL in a sample, the kit containing a first reagent composition having at least one activity selected from the group consisting of a cholesterol esterase activity and a cholesterol oxidase activity and a second reagent composition for quantifying the lipoprotein C of a measurement target, where a ratio R1 represented by ABS400/ABS450 is 0.90 or more and 3.50 or less, and in an absorption spectrum after storing the second reagent composition at 37° C. for two weeks, the ratio R1 represented by ABS400/ABS450 is 0.90 or more and 9.00 or less.
    Type: Application
    Filed: June 2, 2021
    Publication date: August 3, 2023
    Applicant: DENKA COMPANY LIMITED
    Inventor: Yasuki ITOH
  • PHOSPHOR, WAVELENGTH CONVERSION BODY, AND LIGHT EMITTING DEVICE
    Publication number: 20230242814
    Abstract: A phosphor contains an inorganic compound in which Eu as an activator is solid-soluted in an inorganic crystal having a crystal represented by Li1Ba2Al1Si7N12 or the same crystal structure as the crystal represented by Li1Ba2Al1Si7N12, in which in an X-ray diffraction pattern of the phosphor measured using a Cu-K? ray, I1 and I2 satisfy 0<I2/I1?0.050 when a peak maximum intensity of a peak which is present at a position where a diffraction angle 2? is in a range of 31.3° or more and 31.6° or less is I1, and a peak maximum intensity of a peak which is present at a position where a diffraction angle 2? is in a range of 29.8° or more and 30.6° or less is I2.
    Type: Application
    Filed: June 17, 2021
    Publication date: August 3, 2023
    Applicant: DENKA COMPANY LIMITED
    Inventor: Hideyuki EMOTO
  • POLYVINYL ALCOHOL-BASED POLYMER
    Publication number: 20230242687
    Abstract: A PVA is excellent in heat resistance and pressure resistance. A polyvinyl alcohol-based polymer, as a saponificated product of a homopolymer composed of a vinyl ester monomer; a copolymer of a vinyl ester monomer and a monofunctional monomer other than the vinyl ester; a copolymer of a vinyl ester monomer and a polyfunctional monomer; or a copolymer of a vinyl ester monomer, a monofunctional monomer other than vinyl ester, wherein the polyvinyl alcohol-based polymer has a slope of 1.2 or less in a double logarithmic plot of storage elastic modulus G? (at 20° C.) in an angular frequency region of 1.0 to 10.0 rad/s, in measurement of an aqueous solution of the polyvinyl alcohol-based polymer filtered through a 100-mesh filter (opening: 0.154 mm) and then adjusted to a concentration of 10.0 mass %.
    Type: Application
    Filed: July 15, 2021
    Publication date: August 3, 2023
    Applicant: DENKA COMPANY LIMITED
    Inventor: Akihiro YAMASHITA
  • MALEIMIDE-BASED COPOLYMER, METHOD FOR PRODUCING SAME, AND RESIN COMPOSITION OBTAINED USING SAME
    Publication number: 20230235101
    Abstract: The present invention provides a maleimide-based copolymer, a method for producing same, and a resin composition obtained using same. This maleimide-based copolymer contains 40-60 mass % of aromatic vinyl monomer units, 5-20 mass % of vinyl cyanide monomer units, and 35-50 mass % of maleimide monomer units, and is such that a 4 mass % tetrahydrofuran solution of the copolymer has a transmittance of 90% or more for light having a wavelength of 450 nm at an optical path length of 10 mm, and the residual maleimide-based monomer amount is less than 300 ppm. This maleimide-based copolymer preferably further contains 0-10 mass % of unsaturated dicarboxylic acid anhydride monomer units, and preferably has a glass transition temperature of 165° C. or higher.
    Type: Application
    Filed: January 27, 2023
    Publication date: July 27, 2023
    Applicant: Denka Company Limited
    Inventors: Masanori Matsumoto, Tetsuo Noguchi, Kohhei Nishino
  • Mucosal adjuvant
    Patent number: 11707521
    Abstract: A mucosal adjuvant may have high mucosal immunogenicity and high safety and be useful in the preparation of mucosal vaccines, and a mucosal vaccine composition may include the same. Such mucosal adjuvant may include TGDK. A method for preparing the mucosal vaccine composition may include mixing TGDK with an immunogen.
    Type: Grant
    Filed: September 26, 2019
    Date of Patent: July 25, 2023
    Assignees: DENKA COMPANY LIMITED, NATIONAL UNIVERSITY CORPORATION KUMAMOTO UNIVERSITY
    Inventors: Shogo Misumi, Naoki Kishimoto, Ryotaro Mitsumata, Nagisa Nakata, Takuma Gotanda
  • COMPOSITE PARTICLE PRODUCTION METHOD, COMPOSITE PARTICLE AND MIXTURE
    Publication number: 20230227658
    Abstract: A method for producing a composite particle, the method containing: (a) mixing a raw material particle and at least one type of fine particles selected from SiO2 fine particles and Al2O3 fine particles, the fine paricles having a diameter smaller than that of the raw material particle; and (b) heating the mixture of the raw material particles and the fine particles, wherein the raw material particle contains three components of ZnO, Al2O3, and SiO2, and a content of the ZnO is 17 to 43% by mole, a content of the Al2O3 is 9 to 20% by mole, and a content of the SiO2 is 48 to 63% by mole, based on the total content of the three components.
    Type: Application
    Filed: May 10, 2021
    Publication date: July 20, 2023
    Applicant: DENKA COMPANY LIMITED
    Inventors: Naotsugu NOGAMI, Motoharu FUKAZAWA, Takuto OKABE
  • WAFER PROCESSING SHEET AND WAFER PROCESSING METHOD
    Publication number: 20230230870
    Abstract: A sheet for processing a wafer, including a substrate sheet that comes into contact with a main surface of the wafer, wherein the substrate sheet has an exponential coefficient in an exponential trendline for storage modulus E?30-80 at 30° C. to 80° C. of ?0.035 to ?0.070.
    Type: Application
    Filed: March 26, 2021
    Publication date: July 20, 2023
    Applicant: Denka Company Limited
    Inventors: Mizuki HASUMI, Tomoya TSUKUI
  • COMPOSITE BODY AND LAYERED BODY
    Publication number: 20230227370
    Abstract: One aspect of the present disclosure provides a composite body including: a nitride sintered body having a porous structure; and a semi-cured product of a thermosetting composition impregnated into the above-described nitride sintered body, in which dielectric breakdown voltage is 4.5 kV or higher.
    Type: Application
    Filed: May 13, 2021
    Publication date: July 20, 2023
    Applicant: Denka Company Limited
    Inventors: Nobuya SUZUKI, Saori INOUE, Yasuhisa UESHIMA, Ryo YOSHIMATSU, Ryuji KOGA
  • B-sialon phosphor and light emitting device
    Patent number: 11702592
    Abstract: A ?-sialon phosphor that is a solid solution of europium, in which D50 is 7.0 ?m or more and 20.0 ?m or less and (D50?D10)/D50 is 0.60 or less, where D50 is a 50% area diameter of primary particles of the ?-sialon phosphor, and D10 is a 10% area diameter of the primary particles of the ?-sialon phosphor. Primary particles are defined as single-crystal particles distinguished for each crystal orientation by identifying the crystal orientation of individual particles of the ?-sialon phosphor by an electron backscatter diffraction image method. D50 and D10 are obtained by image analysis of the cross-sectional area of the primary particles.
    Type: Grant
    Filed: November 7, 2019
    Date of Patent: July 18, 2023
    Assignee: DENKA COMPANY LIMITED
    Inventors: Manabu Kobayashi, Keita Kobayashi, Tomohiro Nomiyama, Shintaro Watanabe
  • Layered sheet, electronic component packaging container, and electronic component packaging
    Patent number: 11701874
    Abstract: A layered sheet has a substrate layer and surface layers provided on both surfaces of the substrate layer, wherein the surface layers contain 50 to 90 mass % of component (A) defined below and 10 to 50 mass % of component (B) defined below relative to the overall mass of the surface layer; the substrate layer is composed of a vinyl aromatic hydrocarbon resin composition containing monomer units derived from conjugated dienes; and a percentage of the monomer units derived from the conjugated dienes in the substrate layer is 6 to 14 mass % relative to all monomer units in the vinyl aromatic hydrocarbon-based resin composition. Component (A) is a rubber-modified (meth)acrylic acid ester-vinyl aromatic hydrocarbon copolymer in which the percentage of a conjugated diene rubber component is 5 to 25 mass %. Component (B) is a polymeric antistatic agent.
    Type: Grant
    Filed: April 16, 2020
    Date of Patent: July 18, 2023
    Assignee: DENKA COMPANY LIMITED
    Inventors: Ryosuke Yanaka, Junpei Fujiwara