Patents Assigned to DENKA COMPANY LIMITED
  • Patent number: 10982029
    Abstract: Provided are an acrylic rubber composition having higher tensile properties and higher heat resistance and a vulcanizate thereof. An acrylic rubber composition includes 1 to 25 parts by mass of a layered clay mineral relative to 100 parts by mass of an acrylic rubber. The acrylic rubber is a copolymer of a (meth)acrylic acid alkyl ester and a curesite monomer.
    Type: Grant
    Filed: June 27, 2017
    Date of Patent: April 20, 2021
    Assignees: DENKA COMPANY LIMITED, INDIAN INSTITUTE OF TECHNOLOGY KHARAGPUR
    Inventors: Tatsuya Nakano, Takashi Kawasaki, Toshiaki Miyauchi, Tatsunori Horiguchi, Tuhin Saha, Anil K. Bhowmick
  • Patent number: 10982139
    Abstract: Provided is a fluoride phosphor that has a good external quantum efficiency and is suitable for stably producing white LEDs. The fluoride phosphor having a composition represented by a general formula (1), a bulk density of 0.80 g/cm3 or more, and a mass median diameter (D50) of 30 ?m or less: general formula: A2M(1-n)F6:Mn4+n (1), wherein 0<n?0.1, the element A is one or more alkali metal elements including at least K, and the element M is a simple substance of Si, a simple substance of Ge, or a combination of Si and one or more elements selected from the group consisting of Ge, Sn, Ti, Zr, and Hf.
    Type: Grant
    Filed: June 12, 2018
    Date of Patent: April 20, 2021
    Assignee: Denka Company Limited
    Inventors: Masayoshi Ichikawa, Ryosuke Konda, Hideyuki Emoto
  • Publication number: 20210094883
    Abstract: The present invention relates to an alumina fiber having the content of sodium oxide of 530 to 3,200 ppm and a mass ratio (A/B) of the content (A) of the sodium oxide to the content (B) of calcium oxide of 5 to 116.
    Type: Application
    Filed: October 19, 2018
    Publication date: April 1, 2021
    Applicant: Denka Company Limited
    Inventors: Teruhiro AIKYO, Yasutaka OSHIMA, Hiroyuki OHASHI, Koichi FUJI, Yosuke GOTO
  • Patent number: 10955426
    Abstract: Disclosed is a method for quantifying HDL2 cholesterol in a test sample without requiring laborious operations. The method for quantifying cholesterol comprises allowing phospholipase to act on HDL to quantify cholesterol. Also disclosed is a method comprising: a first step of transferring cholesterols other than high-density lipoproteins in a test sample to the outside of the reaction system; and a second step of quantifying high-density lipoprotein 2 cholesterol among the high-density lipoproteins remaining in the reaction system; wherein, by performing the second step by the above method, high-density lipoprotein 2 cholesterol in the test sample can be quantified.
    Type: Grant
    Filed: June 26, 2018
    Date of Patent: March 23, 2021
    Assignee: DENKA COMPANY LIMITED
    Inventors: Maiko Higuchi, Yasuki Itoh
  • Patent number: 10957511
    Abstract: An electron source capable of suppressing consumption of an electron emission material is provide. The present invention provides an electron source including: an electron emission material; and, an electron emission-suppressing material covering a side surface of the electron emission material, wherein a work function of the electron emission-suppressing material is higher than that of the electron emission material, and a thermal emissivity of the electron emission-suppressing material is lower than that of the electron emission material.
    Type: Grant
    Filed: December 9, 2019
    Date of Patent: March 23, 2021
    Assignee: Denka Company Limited
    Inventors: Toshiyuki Morishita, Hiromitsu Chatani, Shimpei Hirokawa, Toshiyuki Ibayashi, Isao Sugimoto
  • Publication number: 20210079298
    Abstract: An ?-sialon phosphor represented by general formula: MxEuy(Si,Al)12(O,N)16, where M represents at least one or more elements selected from Li, Mg, Ca, Y and a lanthanoid (excluding La and Ce), 0<x, and 0<y, where the phosphor includes, as a host crystal, a crystal structure identical to that of an ?-sialon crystal phase, and the phosphor has a bulk density of 1.00 g/cm3 or more and 1.80 g/cm3 or less. Also provided is a light-emitting element including the ?-sialon phosphor and a semiconductor light-emitting element capable of exciting the ?-sialon phosphor.
    Type: Application
    Filed: March 19, 2019
    Publication date: March 18, 2021
    Applicant: DENKA COMPANY LIMITED
    Inventors: Yusuke TAKEDA, Tomohiro NOMIYAMA, Shintaro WATANABE
  • Patent number: 10950863
    Abstract: Provided is a binder composition for negative electrode that has good binding property with an active material and a metal foil and is superior in reduction resistance. A binder composition for negative electrode comprising a graft copolymer obtained by graft copolymerizing, with polyvinyl alcohol, a monomer containing (meth)acrylonitrile as a main component, wherein the polyvinyl alcohol has an average degree of polymerization of 300 to 3000; the polyvinyl alcohol has a saponification degree of 70 to 100 mol %; the graft copolymer has a polyvinyl alcohol amount of 10 to 90 mass %; and the graft copolymer has a poly(meth)acrylonitrile amount of 90 to 10 mass %.
    Type: Grant
    Filed: March 8, 2017
    Date of Patent: March 16, 2021
    Assignee: DENKA COMPANY LIMITED
    Inventors: Takuya Narutomi, Jun Watanabe, Shigeru Suzuki
  • Patent number: 10947450
    Abstract: Provided is a fluoride phosphor that has a good external quantum efficiency and is suitable for stably producing white LEDs. The fluoride phosphor having a composition represented by a general formula (1), a bulk density of 0.80 g/cm3 or more, and a mass median diameter (D50) of 30 ?m or less: general formula: A2M(1-n)F6:Mn4+n (1), wherein 0<n?0.1, the element A is one or more alkali metal elements including at least K, and the element M is a simple substance of Si, a simple substance of Ge, or a combination of Si and one or more elements selected from the group consisting of Ge, Sn, Ti, Zr, and Hf.
    Type: Grant
    Filed: June 12, 2018
    Date of Patent: March 16, 2021
    Assignee: Denka Company Limited
    Inventors: Masayoshi Ichikawa, Ryosuke Konda, Hideyuki Emoto
  • Patent number: 10941339
    Abstract: The purpose of the present invention is to provide a fluoride phosphor (represented by the general formula A2SiF6:Mn) having high luminescence intensity and reliability, a high-luminance light-emitting device using this phosphor, and a production method for this phosphor. The production method for a fluoride phosphor represented by the general formula A2SiF6:Mn (where element A is an alkali metal element including at least potassium), wherein the fluoride phosphor production method comprises: a step of preparing an aqueous solution wherein element A and fluorine are dissolved in a solvent; and a step of adding, to the aqueous solution, solid silicon dioxide and a manganese compound that supplies manganese having a valence other than +7; wherein an added amount of the manganese compound is within a range such that an Mn content in the fluoride phosphor becomes at least 0.1 mass % and at most 1.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: March 9, 2021
    Assignee: Denka Company Limited
    Inventors: Masayoshi Ichikawa, Hideyuki Emoto, Ryosuke Kondo
  • Patent number: 10920138
    Abstract: An object of the present invention is to provide a red phosphor having improved luminance. A further object of the present invention is to provide a light emitting device having higher luminance by using the red phosphor. There is provided a phosphor having the main crystal phase represented by the general formula: MAlSiN3 in which the M element(s) represent one or more elements selected from the group consisting of Mg, Ca, Sr, and Ba, the main crystal phase being composed of only CaAlSiN3 or having the same crystal structure as that of CaAlSiN3, and some of the M element(s) being substituted with an Eu element, wherein the phosphor contains W (tungsten) in an amount of 3 ppm or more and 500 ppm or less, based on the total mass of the phosphor.
    Type: Grant
    Filed: December 27, 2016
    Date of Patent: February 16, 2021
    Assignee: DENKA COMPANY LIMITED
    Inventors: Shintaro Watanabe, Yusuke Takeda
  • Patent number: 10919811
    Abstract: Provided are an aluminum-silicon-carbide composite having high thermal conductivity, low thermal expansion, and low specific gravity and a method for producing the composite. Provided is an aluminum-silicon-carbide composite formed by impregnating a porous silicon carbide molded body with an aluminum alloy. The ratio of silicon carbide in the composite is 60 vol % or more, and the composite contains 60-75 mass % of silicon carbide having a particle diameter of 80 ?m or more and 800 ?m or less, 20-30 mass % of silicon carbide having a particle diameter of 8 ?m or more and less than 80 ?m, and 5-10 mass % of silicon carbide having a particle diameter of less than 8 ?m.
    Type: Grant
    Filed: July 31, 2015
    Date of Patent: February 16, 2021
    Assignee: Denka Company Limited
    Inventors: Akimasa Yuasa, Takeshi Miyakawa, Daisuke Goto
  • Publication number: 20210032535
    Abstract: A ?-sialon phosphor represented by general formula: Si6?zAlzOzN8?z (0<z<4.2) has as a host crystal, a crystal structure identical to that of a ?-sialon crystal phase and having a bulk density of 0.80 g/cm3 or more and 1.60 g/cm3 or less. Also, a light-emitting element includes the ?-sialon phosphor and a semiconductor light-emitting element capable of exciting the ?-sialon phosphor.
    Type: Application
    Filed: March 19, 2019
    Publication date: February 4, 2021
    Applicant: DENKA COMPANY LIMITED
    Inventors: Yusuke TAKEDA, Tomohiro NOMIYAMA, Manabu KOBAYASHI, Shintaro WATANABE
  • Publication number: 20210032171
    Abstract: A nitride-based ceramics resin composite body having thermal conductivity, electrical insulation, and adhesion to adherends equal to conventional products, and having improved heat resistance reliability during the reflow process, and a thermal conductive insulating adhesive sheet using the same are provided. A nitride-based ceramics resin composite body in which a thermosetting resin composition is impregnated in a porous nitride-based ceramics sintered body is provided. The thermosetting resin composition includes a specific epoxy resin and a bismaleimide triazine resin, and a water absorption of the thermosetting resin composition in a completely cured state measured in accordance with method A in JIS K7209 (2000) is 1% by mass or less.
    Type: Application
    Filed: December 5, 2018
    Publication date: February 4, 2021
    Applicant: DENKA COMPANY LIMITED
    Inventors: Yoshitaka MINAKATA, Eri SASAKI, Toshitaka YAMAGATA, Saori INOUE, Ryo YOSHIMATU, Ryuji KOGA
  • Publication number: 20210035300
    Abstract: A method, a program, and a method determining hypermutated type cancer with higher accuracy than before is provided.
    Type: Application
    Filed: February 7, 2019
    Publication date: February 4, 2021
    Applicants: Niigata University, Denka Company Limited
    Inventors: Toshifumi Wakai, Shujiro Okuda, Yoshifumi Shimada, Hiroshi Izutsu, Keisuke Kodama
  • Patent number: 10905183
    Abstract: A resin composition for flame retardant artificial hair which has favorable transparency and combability similar to those of human hair and exhibits excellent flame retardancy. A resin composition for flame retardant artificial hair is obtained by configuring a resin composition including 100 parts by mass of a polyester (A) and 5-40 parts by mass of a bromine-containing flame retardant (B) including at least one kind selected from poly(pentabromobenzyl acrylate), a brominated phenol resin, and polydibromophenylene oxide, wherein the melt viscosity of the polyester (A) is 80-300 Pa·s.
    Type: Grant
    Filed: March 7, 2017
    Date of Patent: February 2, 2021
    Assignee: DENKA COMPANY LIMITED
    Inventors: Megumi Tsukahara, Atsushi Horihata, Atsushi Takei
  • Patent number: 10900970
    Abstract: An object of the present invention is to improve visibility by reducing background noise in order to accurately detect the signal from a target substance in an immunochromatographic device. The immunochromatographic device comprises a membrane having a detection region, to which an antibody or antigen serving as a capturing substance capable of capturing a target substance is immobilized, for detecting the target substance by using an antigen or antibody labeled with a labeling carrier that is a colored particle to form a complex of the capturing substance-target substance-labeled antigen or antibody in the capturing substance-immobilized detection region on the device, based on color of the labeling carrier, wherein a colorant having a color complementary to the color of the labeling carrier is allowed to be contained in a dry state in a constituent member of the device such that the colorant is developed together with a specimen when the specimen is developed on the device.
    Type: Grant
    Filed: April 27, 2016
    Date of Patent: January 26, 2021
    Assignee: Denka Company Limited
    Inventors: Osamu Ishikawa, Risa Kohiyama, Takashi Miyazawa
  • Publication number: 20210017448
    Abstract: A phosphor in which an element represented by R? is solid-solutionized in a phosphor host crystal represented by M?(L, A)?X?, wherein M is at least one type of element selected from Mg, Ca, Sr, Ba and Zn, L is at least one type of element selected from Li, Na and K, A is at least one type of element selected from Al, Ga, B, In, Sc, Y, La and Si, X is at least one type of element selected from O, N, F and Cl (where all of X being N is excluded), R is at least one type of element selected from Mn, Cr, Ti, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho and Yb, ?, ?, ? and ? satisfy ?+?+?+?=9, 0.00<??1.30, 3.70???4.30, 3.70???4.30, and 0.00<??1.30.
    Type: Application
    Filed: March 14, 2019
    Publication date: January 21, 2021
    Applicants: DENKA COMPANY LIMITED, NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Hiroaki TOYOSHIMA, Ryo YOSHIMATSU, Taiyo YAMAURA, Masato AKABANE, Naoto HIROSAKI
  • Publication number: 20210011036
    Abstract: Provided are a method which enables more accurate quantification of lipoprotein cholesterol in a test sample, and a quantification reagent and a quantification kit used for this method. The present invention provides a quantification method for lipoprotein cholesterol in a test sample containing a lipoprotein optionally using a quantification reagent, the method including adding a phospholipid to the test sample or the quantification reagent. The present invention also provides a quantification reagent for cholesterol in a lipoprotein used in the method of the present invention, the quantification reagent containing a phospholipid. The present invention also provides a quantification kit for lipoprotein cholesterol used in the method of the present invention, the quantification kit containing a phospholipid.
    Type: Application
    Filed: March 28, 2019
    Publication date: January 14, 2021
    Applicant: DENKA COMPANY LIMITED
    Inventors: Noriyuki SATOH, Makoto IKAIDA, Yuhko HIRAO
  • Publication number: 20210009896
    Abstract: A red phosphor represented by general formula: MSiAlN3, wherein M is at least one or more elements selected from Mg, Ca, Sr and Ba, and is partially replaced with Eu and has, as a host crystal, a crystal structure identical to that of a CaAlSiN3 crystal phase, and the phosphor has a bulk density of 0.70 g/cm3 or more and 2.30 g/cm3 or less. There is also provided a light-emitting element including the red phosphor and a semiconductor light-emitting element capable of exciting the red phosphor.
    Type: Application
    Filed: March 19, 2019
    Publication date: January 14, 2021
    Applicant: DENKA COMPANY LIMITED
    Inventors: Yusuke TAKEDA, Tomohiro NOMIYAMA, Marina TAKAMURA, Shintaro WATANABE
  • Patent number: 10888132
    Abstract: The present invention is to provide a fiber for artificial hair which can freely change the hairstyle at home while maintaining the wave shape of the fiber. A fiber for artificial hair having a bending rigidity maintaining ratio defined by formula (1) is 40 to 80% and a heat shrinkage ratio defined by formula (2) is 0.0 to 5.0% is provided. bending rigidity maintaining ratio (%)=100×{(bending rigidity in a state after conditioning for 24 hours at 30° C.×90% RH)/(bending rigidity in a state after conditioning for 24 hours at 23° C.×50% RH)}??(1) heat shrinkage ratio (%)=100×{(length before heat treatment)?(length after heat treatment for 5 min at 155° C.)}/(length before heat treatment)??(2).
    Type: Grant
    Filed: June 27, 2017
    Date of Patent: January 12, 2021
    Assignee: DENKA COMPANY LIMITED
    Inventors: Atsushi Horihata, Atsushi Takei, Rentaroh Suzuki