Patents Assigned to Denki Kagaku Kogyo Kabushiki Kaisha
  • Patent number: 10005867
    Abstract: The present invention provides modified PVA having unsaturated double bonds derived from a specific monomer in the main chain of the molecule. A modified polyvinyl alcohol containing bond units of the formula (1) having double bonds in its molecular main chain: wherein each of X1 and X2 is a C1-12 lower alkyl group, a hydrogen atom or a metal atom, g is an integer of from 0 to 3, h is an integer of from 0 to 12, Y1 is a hydrogen atom or —COOM, and M is a hydrogen atom, an alkyl group or a metal atom.
    Type: Grant
    Filed: August 29, 2005
    Date of Patent: June 26, 2018
    Assignee: Denki Kagaku Kogyo Kabushiki Kaisha
    Inventors: Satoshi Watanabe, Hirohisa Otake
  • Patent number: 9821535
    Abstract: There is provided an interlayer film for laminated glass which is capable of enhancing sound insulating properties in the laminated glass obtained in the case of being used for constituting the laminated glass, and laminated glass prepared using the interlayer film for laminated glass. An interlayer film for laminated glass according to the present invention includes a modified polyvinyl acetate and a plasticizer, and the modified polyvinyl acetate has a vinyl acetate structural unit and a fatty acid vinyl ester structural unit; the laminated glass according to the present invention includes a first laminated glass constituent member, a second laminated glass constituent member, and an interlayer film sandwiched between the first and second laminated glass constituent members, and in the laminated glass according to the present invention, the interlayer film is the interlayer film for laminated glass described above.
    Type: Grant
    Filed: October 31, 2013
    Date of Patent: November 21, 2017
    Assignees: SEKISUI CHEMICAL CO., LTD., DENKI KAGAKU KOGYO KABUSHIKI KAISHA
    Inventors: Michio Shimamoto, Tatsuya Iwamoto, Ryousuke Komatsu, Shougo Yoshida, Nobuyuki Tanno, Takao Hashimoto, Hirohisa Otake
  • Publication number: 20170317007
    Abstract: To provide a method for manufacturing a heat dissipation component having excellent heat dissipation properties, in which there is minimal return of warping after the bonding of a circuit board, and to provide a heat dissipation component manufactured using the method. Provided is a method for manufacturing a warped flat-plate-shaped heat dissipation component containing a composite part that comprises silicon carbide and an aluminum alloy, wherein the method for manufacturing the heat dissipation component is characterized in that the heat dissipation component is sandwiched in a concave-convex mold having a surface temperature of at least 450° C. and having a pair of opposing spherical surfaces measuring 7000-30,000 mm in curvature radius, and pressure is applied for 30 seconds or more at a stress of 10 kPa or more such that the temperature of the heat dissipation component reaches at least 450° C.
    Type: Application
    Filed: August 5, 2015
    Publication date: November 2, 2017
    Applicant: DENKI KAGAKU KOGYO KABUSHIKI KAISHA
    Inventors: Daisuke GOTO, Takeshi MIYAKAWA, Yosuke ISHIHARA
  • Publication number: 20170044407
    Abstract: A binder for glass fiber nonwoven comprising a polyvinyl alcohol, the polyvinyl alcohol having a shape with an aspect ratio of 1.9 to 30 and a degree of saponification of 99.0 mol % or more.
    Type: Application
    Filed: August 12, 2015
    Publication date: February 16, 2017
    Applicant: DENKI KAGAKU KOGYO KABUSHIKI KAISHA
    Inventor: Nobuyuki Tanno
  • Publication number: 20160280994
    Abstract: Provided is a Li-solid-solubilized ?-SiAlON phosphor containing Li+ as solid solubilized for stabilization of the structure that is higher in luminous efficiency than before and a light-emitting element and a lighting device comprising the same. The (Li and Eu)-containing ?-SiAlON crystal has a Li content of 1.8 to 3 mass %, an Eu content of 0.1 to 1.5 mass % and an average particle diameter, as determined by laser diffraction/scattering method, of 7 to 35 ?m. The phosphor is used in the light-emitting element and the lighting device.
    Type: Application
    Filed: November 12, 2013
    Publication date: September 29, 2016
    Applicant: DENKI KAGAKU KOGYO KABUSHIKI KAISHA
    Inventor: Hideyuki EMOTO
  • Publication number: 20160280993
    Abstract: Provided is a Li-solid-solubilized ?-SiAlON phosphor containing Li+ solid-solubilized for stabilization of the structure which is higher in luminous efficiency than any phosphor currently available and a light-emitting element and a lighting device comprising the same. An Eu-activated Li-solid-solubilized ?-SiAlON, having a lattice constant a of 0.7820 to 0.7835 nm, a lattice constant c of 0.5645 to 0.5670 nm, an oxygen content of 0.4 to 1.2 mass %, and an europium (Eu) content of 0.3 to 1.2 mass %, and emitting a light having a peak wavelength of 580 to 595 nm in the fluorescence spectrum obtained when it is excited by a monochromatic light having a peak wavelength in the range of 450 to 460 nm.
    Type: Application
    Filed: October 30, 2013
    Publication date: September 29, 2016
    Applicant: DENKI KAGAKU KOGYO KABUSHIKI KAISHA
    Inventor: Hideyuki EMOTO
  • Publication number: 20160039999
    Abstract: Provided are a blended rubber and a blended rubber composition that give a vulcanizate superior in abrasion resistance and ozone resistance, and a vulcanizate prepared by vulcanizing the blended rubber composition. A blended rubber, comprising 30 to 93 mass % of a chloroprene rubber, 5 to 50 mass % of a soft polyvinyl chloride, and 2 to 20 mass % of an acrylonitrile-butadiene rubber. The polyvinyl chloride resin used preferably has a polymerization degree of 300 to 3000 and the acrylonitrile-butadiene rubber preferably has an acrylonitrile content of 18 to 50 mass %.
    Type: Application
    Filed: March 28, 2014
    Publication date: February 11, 2016
    Applicant: DENKI KAGAKU KOGYO KABUSHIKI KAISHA
    Inventors: Uichiro YAMAGISHI, Hideki TOYA, Satoru IKARI, Yasushi ABE
  • Patent number: 9216193
    Abstract: The present invention provides a crosslinked hyaluronic acid composition including self-crosslinking hyaluronic acid particles having an equilibrium swelling capacity of 3-fold to 10-fold, and an aqueous solvent, wherein a dry weight of the self-crosslinking hyaluronic acid particles based on the total volume of the crosslinked hyaluronic acid composition is 3 w/v % to 8 w/v %. The crosslinked hyaluronic acid composition of the invention uses self-crosslinking hyaluronic acid particles of which the equilibrium swelling capacity is within the above predetermined range. Accordingly, the viscosity does not sharply increase even if the concentration thereof is increased. Therefore, if the crosslinked hyaluronic acid composition is applied to an injection, it is possible to obtain a sufficient curative effect on knee osteoarthritis even with a small frequency of administration.
    Type: Grant
    Filed: August 23, 2011
    Date of Patent: December 22, 2015
    Assignee: DENKI KAGAKU KOGYO KABUSHIKI KAISHA
    Inventors: Masamichi Hashimoto, Tadashi Morikawa, Yoshiaki Miyata, Akio Ohno, Kei Takahashi, Daisuke Ogasawara, Kenji Fujii, Teruaki Kakema, Mariko Takeda
  • Publication number: 20150354099
    Abstract: There is provided an alumina fiber capable of fixing a honeycomb carrier while maintaining elasticity for a long period of time even in a severe usage environment, and an alumina fiber aggregate formed of the fiber. Problems in a gripping material of an automotive honeycomb carrier are solved by applying an alumina fiber containing from 70 to 98% by mass of alumina and from 2 to 30% by mass of silica, having an average fiber diameter of from 3.0 to 8.0 ?m, a ratio of fibers having a fiber diameter exceeding 10 ?m being 5% or less in terms of the number of fibers and a size of a mullite crystallite contained in each fiber of from 10 to 1500 ?, and by forming an alumina fiber aggregate by using the fibers.
    Type: Application
    Filed: January 23, 2014
    Publication date: December 10, 2015
    Applicant: DENKI KAGAKU KOGYO KABUSHIKI KAISHA
    Inventors: Yasutaka OHSHIMA, Haruko SAKAI, Masataka EGUCHI, Kazutaka FUJITA, Ryochi SUZUKI
  • Patent number: 9190189
    Abstract: Disclosed is an aluminum nitride substrate for a circuit board, the substrate having aluminum nitride crystal grains with an average grain size of 2 to 5 ?m and a thermal conductivity of at least 170 W/m·K. The aluminum nitride substrate does not include a dendritic grain boundary phase and has a breakdown voltage of at least 30 kV/mm at 400° C. Also provided is a method for producing the aluminum nitride substrate, including the steps of heating a raw material containing an aluminum nitride powder to 1500° C. at a pressure of at most 150 Pa, then increasing and holding the temperature at 1700 to 1900° C. in a pressurized atmosphere of at least 0.4 MPa using a non-oxidizing gas, then cooling to 1600° C. at a cooling rate of at most 10° C./min.
    Type: Grant
    Filed: May 24, 2011
    Date of Patent: November 17, 2015
    Assignee: DENKI KAGAKU KOGYO KABUSHIKI KAISHA
    Inventors: Yusaku Harada, Katsunori Terano, Takeshi Gotoh
  • Publication number: 20150314554
    Abstract: Provided is a water-repellent, thermoplastic resin sheet provided with a textured layer having a microtexture on one surface side, and a water repellent layer formed with an approximately constant thickness on the aforementioned one surface side of the textured layer, wherein at least the surface region on the one surface side of the textured layer is a cross-linked material which maintains the microtexture even after heated drawing, and the water-repellent layer is formed from an olefin copolymer resin containing hydrophobic oxide particles. Also provided is a molded article, such as a molded container, formed by thermoforming the thermoplastic resin sheet.
    Type: Application
    Filed: July 18, 2013
    Publication date: November 5, 2015
    Applicant: DENKI KAGAKU KOGYO KABUSHIKI KAISHA
    Inventors: Junpei FUJIWARA, Tomohiro OSAWA, Shogo HOSHINO, Toshio NAGANO, Atsushi TAKEI
  • Publication number: 20150307353
    Abstract: Provided is a method for producing a phosphor, using a nitride raw material, that gives a high-reliability (Sr,Ca)AlSiN3-based nitride phosphor at a productivity higher than before. The method comprises a mixing step of mixing raw materials and a calcining step of calcining the mixture obtained in the mixing step and, in producing the phosphor having a crystalline structure substantially identical with that of (Sr,Ca)AlSiN3 crystal as the host crystal, a strontium nitride containing SrN, Sr2N, or the mixture thereof as the main crystalline phase, as determined by crystalline phase analysis by powder X-ray diffractometry, and having a nitrogen content of 5 to 12 mass % is used as part of the raw materials.
    Type: Application
    Filed: February 22, 2013
    Publication date: October 29, 2015
    Applicant: DENKI KAGAKU KOGYO KABUSHIKI KAISHA
    Inventors: Ryozo NONOGAKI, Masayoshi ICHIKAWA, Tomohiro NOMIYAMA, Yusuke TAKEDA
  • Publication number: 20150306852
    Abstract: Provided is a water-repellent, thermoplastic resin sheet including a textured layer which is formed from a polyethylene resin composition comprising a water repellent agent and which has a microscopic texture on one surface side, wherein at least the surface region of the textured layer is a cross-linked material which maintains the microscopic texture even after heated drawing. Also provided is a molded article, such as a molded container, formed by thermoforming the thermoplastic resin sheet.
    Type: Application
    Filed: July 18, 2013
    Publication date: October 29, 2015
    Applicant: DENKI KAGAKU KOGYO KABUSHIKI KAISHA
    Inventors: Junpei FUJIWARA, Atsushi TAKEI, Tomohiro OSAWA
  • Patent number: 9163175
    Abstract: ?-SiAlON represented by a general formula Si6-zAlzOzN8-z with Eu dissolved therein, whose spin density corresponding to absorption g=2.00±0.02 at 25° C. obtained by the electron spin resonance method is equal to or lower than 6.0×1016 spins/g. A method of manufacturing the ?-SiAlON includes: a mixing step of mixing ?-SiAlON materials; a baking step of baking the ?-SiAlON having undergone the mixing step; a heating step of increasing the ambient temperature of the materials having undergone the mixing step from 1500° C. to a baking temperature of the baking step at a rate equal to or lower than 2° C./min.; an annealing step of annealing the ?-SiAlON having undergone the baking step; and an acid treatment step of acid-treating the ?-SiAlON having undergone the annealing step. The objective of the present invention is to provide ?-SiAlON capable of achieving high luminescent efficiency, a method of manufacturing the ?-SiAlON, and a light-emitting device using the ?-SiAlON.
    Type: Grant
    Filed: July 28, 2011
    Date of Patent: October 20, 2015
    Assignee: DENKI KAGAKU KOGYO KABUSHIKI KAISHA
    Inventors: Go Takeda, Hisayuki Hashimoto, Masayoshi Ichikawa, Tomohiro Nomiyama, Suzuya Yamada
  • Patent number: 9156961
    Abstract: Provided are a vulcanizate of a chloroprene rubber composition containing carbon black that generates a smaller amount of heat when used and a method for producing the same by a simpler and more convenient method. First, an unvulcanized rubber composition at least containing a chloroprene polymer and carbon black is vulcanization-molded, to give a semivulcanized molded article having a cure characteristic value, as determined by the method specified in JIS K6300-2: 2001, in the range of t10 to t80. Then, the semivulcanized molded article obtained by semivulcanized film-forming step is additionally vulcanized in the state as it is deformed entirely and the deformation is removed, to give vulcanizate in a desired shape.
    Type: Grant
    Filed: November 27, 2012
    Date of Patent: October 13, 2015
    Assignees: DENKI KAGAKU KOGYO KABUSHIKI KAISHA, NATIONAL UNIVERSITY CORPORATION NAGAOKA UNIVERSITY OF TECHNOLOGY
    Inventors: Yoshinobu Isono, Naoki Kobayashi, Yasushi Abe
  • Publication number: 20150280079
    Abstract: An object of the invention is to provide a phosphor that emits a light containing much red and green light components and a light-emitting device and a lighting apparatus comprising the phosphor that have favorable color rendering properties. An oxide nitride phosphor having a garnet structure represented by Formula [1]: AwAlxCy:Cez, in Formula [1], A=(Lua,Yb), a+b=1, 0<a<1, 0<b<1, C?(Oc,Nd), 10?c+d?16, 1.4?c/d, 2?w+z?4, 4.0<x?7.0); the molar ratio of Ce/A is ?0.015 and the nitrogen content is 0.007 mass % or more.
    Type: Application
    Filed: September 19, 2013
    Publication date: October 1, 2015
    Applicant: DENKI KAGAKU KOGYO KABUSHIKI KAISHA
    Inventors: Keita Kobayashi, Yasuhito Fushii
  • Patent number: 9138970
    Abstract: Disclosed is a thermally shrinkable laminated film which is produced by laminating an intermediate layer comprising a block copolymer resin composition containing a specific block copolymer directly between a front layer and a back layer each comprising a polyester resin, and which has good interlayer adhesion strength. Specifically disclosed is a thermally shrinkable laminated film which is produced by stretching a three-layered laminated sheet along at least one axis so that the interlayer adhesion strength becomes 0.6 N/15 mm or more, wherein the three-layered laminated sheet has an intermediate layer and a front layer and a back layer, the intermediate layer comprises a resin composition comprising two types of block copolymers each having a specific structure and a specific composition at a predetermined mass ratio, and each of the front layer and the back layer comprises a polyester resin.
    Type: Grant
    Filed: September 28, 2010
    Date of Patent: September 22, 2015
    Assignee: DENKI KAGAKU KOGYO KABUSHIKI KAISHA
    Inventors: Eiji Sato, Masayuki Ohishi, Hitoshi Nakazawa
  • Patent number: 9139769
    Abstract: ?-Sialon comprising Eu2+ that is present in a solid solution form in ?-sialon represented by Si6-zAlzOzN ?m [wherein z is 0.3-1.5], which shows, when excited with light of 450 nm in wavelength, a peak wavelength of fluorescent spectrum of 545-560 nm, a half-value breadth of 55 nm or greater, and an external quantum efficiency of 45% or greater. The ?-sialon can be produced by blending at least one kind of oxide selected from aluminum oxide and silicon oxide with silicon nitride and aluminum nitride in such a manner as to give z of 0.3-1.5, further adding thereto a europium compound and a ?-sialon powder having an average particle diameter of 5 ?m or greater and an average degree of circularity of 0.7 or greater, each in a definite amount, and baking the mixture.
    Type: Grant
    Filed: November 4, 2010
    Date of Patent: September 22, 2015
    Assignee: DENKI KAGAKU KOGYO KABUSHIKI KAISHA
    Inventors: Hideyuki Emoto, Kazuhiro Ito
  • Publication number: 20150259469
    Abstract: Provided are an acrylic elastomer superior in adhesiveness to a fluorine-based elastomer, an acrylic elastomer composition containing the same, its laminate, and its crosslinked product and a molded article therefrom. Iodine groups are introduced as crosslinking groups into an acrylic elastomer to an iodine content of 0.1 to 2 mass % with respect to the total mass of the elastomer. In addition, 1 to 7 parts by mass of an organic peroxide and 1 to 5 parts by mass of an onium salt were blended with 100 parts by mass of the acrylic elastomer, to give an acrylic elastomer composition. Further, an acrylic elastomer layer of the acrylic elastomer composition is laminated with a fluorine-based elastomer layer of a fluorine-based elastomer composition mainly containing of a fluorine-based elastomer having iodine groups as crosslinking groups, to give a laminate. The laminate is then crosslinked to give a crosslinked product and a molded article.
    Type: Application
    Filed: November 20, 2013
    Publication date: September 17, 2015
    Applicant: DENKI KAGAKU KOGYO KABUSHIKI KAISHA
    Inventors: Takashi Kawasaki, Tsutomu Kobari, Jo Shinbori
  • Publication number: 20150251163
    Abstract: To provide an alumina-based fibrous mass having a high areal pressure and is usable as a holding material for an exhaust gas cleaners and a production process thereof; the alumina-based fibrous mass has a chemical composition containing an Al2O3 in an amount of 70% or more and less than 90% and having a total pore volume of 0.0055 mL/g or less.
    Type: Application
    Filed: October 31, 2013
    Publication date: September 10, 2015
    Applicants: SAFFIL LIMITED, DENKI KAGAKU KOGYO KABUSHIKI KAISHA
    Inventors: Yasutaka Ohshima, Masaaki Watanabe, Masanori Hisamoto, Ryoetsu Yoshino, Kazutaka Fujita, Masataka Eguchi, Adam Kelsall, Kelvin Weeks, Jonathan Cross