Patents Assigned to Denki Kagaku Kogyo Kabushiki Kaisha
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Publication number: 20140335419Abstract: Provided is positive electrode material for a highly safe lithium-ion secondary battery that can charge and discharge a large current while having long service life. Disclosed are composite particles comprising: at least one carbon material selected from the group consisting of (i) fibrous carbon material, (ii) chain-like carbon material, and (iii) carbon material produced by linking together fibrous carbon material and chain-like carbon material; and lithium-containing phosphate, wherein at least one fine pore originating from the at least one carbon material opens to outside the composite particle. Preferably, the composite particles are coated with carbon. The fibrous carbon material is preferably a carbon nanotube with an average fiber size of 5 to 200 nm. The chain-like carbon material is preferably carbon black produced by linking, like a chain, primary particles with an average particle size of 10 to 100 nm.Type: ApplicationFiled: November 14, 2012Publication date: November 13, 2014Applicant: DENKI KAGAKU KOGYO KABUSHIKI KAISHAInventors: Takashi Kawasaki, Nobuyuki Yoshino, Hiroshi Murata, Takehiko Sawai, Shinji Saito, Kazunori Urao
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Patent number: 8883564Abstract: A process for producing a substrate, which comprises processing an aluminum/graphite composite into plates having a thickness of 0.5-3 mm using a multi-wire saw under the following conditions (1) to (4): (1) the wires have abrasive grains bonded thereto which are one or more substances selected from diamond, C—BN, silicon carbide, and alumina and have an average particle diameter of 10-100 ?m; (2) the wires have a diameter of 0.1-0.3 mm; (3) the wires are run at a rate of 100-700 m/min; and (4) the composite is cut at a rate of 0.1-2 mm/min. The aluminum/graphite composite has a surface roughness (Ra) of 0.1-3 ?m, a thermal conductivity at 25° C. of 150-300 W/mK, a ratio of the maximum to the minimum value of thermal conductivity in three perpendicular directions of 1-1.3, a coefficient of thermal expansion at 25-150° C. of 4×106 to 7.5×10?6/K, a ratio of the maximum to the minimum value of coefficient of thermal expansion in three perpendicular directions of 1-1.Type: GrantFiled: February 8, 2010Date of Patent: November 11, 2014Assignee: Denki Kagaku Kogyo Kabushiki KaishaInventors: Hideki Hirotsuru, Satoshi Higuma, Shinya Narita, Yoshihiko Tsujimura
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Patent number: 8883511Abstract: Provided is a method for evaluating of the chemical stability of a polychloroprene latex that permits evaluation of the chemical stability of polychloroprene at high accuracy. First, an aqueous calcium hydroxide or calcium nitrate solution at a concentration of 0.05 to 0.40 mass % is added to a polychloroprene latex having a solid matter concentration of 45 to 65 mass %. The generated precipitate is then collected by filtration and the dry mass is determined, and the precipitation rate (%) is calculated according to the following Formula (I). Precipitation ? ? rate ? ? ( % ) = A { B × ( C ? / ? 100 ) } × 100 ( I ) (wherein, A represents the dry mass (g) of the precipitate; B represents the mass (g) of the polychloroprene latex, and C represents the solid matter concentration (mass %) of the polychloroprene latex.Type: GrantFiled: March 2, 2012Date of Patent: November 11, 2014Assignee: Denki Kagaku Kogyo Kabushiki KaishaInventors: Kiyoshi Sunada, Takeo Mori
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Publication number: 20140307364Abstract: An object of the invention is to provide an electrode material slurry for preparation of lithium-ion secondary batteries favorable in properties and superior in storage stability and an aqueous binder composition for lithium-ion secondary batteries that can be used for production of lithium-ion secondary batteries superior in discharge rate characteristics and cycle characteristics. Provided is a binder composition for lithium-ion secondary battery electrode, comprising polymer particles containing (a) an ethylenic unsaturated carboxylic ester compound and (b) an ethylenic unsaturated sulfonic acid compound at a (a)/(b) mass ratio of (98 to 91)/(2 to 9) in a total (a) and (b) amount of 70 mass % or more, based on the monomeric raw materials.Type: ApplicationFiled: November 2, 2012Publication date: October 16, 2014Applicants: SEI CORPORATION, DENKI KAGAKU KOGYO KABUSHIKI KAISHAInventors: Hironori Konishi, Daisuke Shimiya, Kazuhiro Kote, Takehiko Sawai, Shinji Saito, Jun Nakagawa
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Publication number: 20140305503Abstract: Disclosed is a fluorine-containing resin film which is formed from a fluorine-containing resin composition and has a thickness of 10 to 50 wherein the fluorine-containing resin composition is prepared by adding 10 to 30 parts by mass of titanium oxide or a composite-oxide-type inorganic pigment to 100 parts by mass of a resin component comprising 60 to 95 parts by mass of a vinylidene fluoride resin and 5 to 40 parts by mass of a methacrylic acid ester resin, and wherein the peak intensity ratio of a II-type crystal, which is expressed by (A)/((A)+(B))×100 wherein A represents the peak height at 840 cm?1 and B represents the peak height at 765 cm?1 in a measurement chart produced by an infrared absorption spectrum, is 60% or more and the total crystallinity is 30% or more as calculated from an X-ray diffraction profile.Type: ApplicationFiled: October 29, 2012Publication date: October 16, 2014Applicant: DENKI KAGAKU KOGYO KABUSHIKI KAISHAInventors: Fukumu Komoda, Tatsunori Sumino, Koji Nakajima
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Patent number: 8859633Abstract: Provided are a temporal fixation method in processing of optical members and a resin composition suitable therefore, which uses a composition which is characterized by containing the following (A3), (B3) and (D3), wherein (A3) is a urethane(meth)acrylate; (B3) is one or more (meth)acrylic acid derivative monomers selected from the group consisting of n-(meth)acryloyloxyalkyl hexahydrophthalimides, carboxyl group-containing (meth)acrylates and (meth)acrylic acid derivative monomers represented by the formula (C3): Z—O—(R2O)p—R1??Formula (C3): wherein Z represents a (meth)acryloyl group, R1 represents a phenyl group or a phenyl group having an alkyl group with 1 to 3 carbon atoms, R2 represents —C2H4—, —C3H6—, —CH2CH(CH3)—, —CH2CH(OH)CH2—, —C4H8— or —C6H12—, and p represents an integer of from 1 to 10; and D(3) is a photopolymerization initiator, along with methods for temporarily fixing a member.Type: GrantFiled: July 7, 2011Date of Patent: October 14, 2014Assignee: Denki Kagaku Kogyo Kabushiki KaishaInventors: Kazuhiro Oshima, Tomoyuki Kanai, Kunio Iriuchijima
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Patent number: 8845858Abstract: Disclosed is a method for separating a bonded body, whereby the bonded body can be separated easily. Specifically disclosed is a method for separating bonded bodies that includes a step that irradiates excimer light with a central wavelength of 1 to 300 nm on to a bonded body that has been formed by using an adhesive composition to bond substrates together, which includes and is formed by one type or two or more types of meth (acrylate) that have one or more (meth)acryloyl groups, and by hardening of said adhesive composition. At least one of the substrates is permeable to the excimer light.Type: GrantFiled: June 1, 2011Date of Patent: September 30, 2014Assignee: Denki Kagaku Kogyo Kabushiki KaishaInventors: Yoshitsugu Goto, Jun Watanabe, Norihiro Shimizu, Hiroyuki Kurimura, Isamu Ichikawa, Kenji Fukao, Yukihiro Morimoto
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Patent number: 8828535Abstract: Provided is a cover tape that has a small range of stripping strength and generates little static electricity when stripped at a high speed. The cover tape according to the present invention comprises at least a substrate layer, an intermediate layer, a charge transfer layer, and a heat seal layer, characterized in that (A) the charge transfer layer containing an acid-modified polyolefin resin and a conductive agent, and (B) the heat seal layer containing (a) a thermoplastic resin component composed of an acrylic resin, and (b) a styrene-conjugated diene copolymer or a hydrogenated resin thereof, the mass ratio of the two components ((a)/(b)) being 20/80 to 80/20.Type: GrantFiled: November 5, 2009Date of Patent: September 9, 2014Assignee: Denki Kagaku Kogyo Kabushiki KaishaInventors: Hisatsugu Tokunaga, Yusuke Tanazawa
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Patent number: 8816030Abstract: Provided are a chloroprene rubber, a chloroprene rubber composition and the vulcanizate and formed body thereof superior in low-temperature properties. A chloroprene rubber is obtained by emulsion polymerization of raw monomers containing antiperiplanar trans-1-chlorobuta-1,3-diene and cis-1-chlorobuta-1,3-diene in a total amount of 0.5 mass % or more, 2,3-dichlorobuta-1,3-diene in an amount of 2.0 mass % or more, and the rest being chloroprene. A composition containing the chloroprene is vulcanized into a formed body.Type: GrantFiled: February 7, 2012Date of Patent: August 26, 2014Assignee: Denki Kagaku Kogyo Kabushiki KaishaInventors: Uichiro Yamagishi, Takashi Tachiyama, Takahiro Kozuka
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Publication number: 20140227471Abstract: Provided are a laminate body, a cross-linked product, and a molded member superior in interlayer adhesiveness. An acrylic elastomer layer 11 is prepared from an acrylic elastomer composition containing an epoxy group-containing acrylic elastomer as major component, an onium salt in an amount of 1 to 5 parts by mass and a polyol compound in an amount of 1 to 8 parts by mass with respect to 100 parts by mass of the acrylic elastomer, and a fluorine-based elastomer layer 12 is prepared from a fluorine-based elastomer composition containing a polyol crosslinking agent. The acrylic elastomer layer 11 and the fluorine-based elastomer layer 12 are laminated, to give a laminate body 1. The laminate body 1 is cross-linked, to give a cross-linked product or a molded member.Type: ApplicationFiled: August 29, 2012Publication date: August 14, 2014Applicant: DENKI KAGAKU KOGYO KABUSHIKI KAISHAInventors: Takashi Kawasaki, Shogo Hagiwara, Toshiaki Miyauchi
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Patent number: 8796145Abstract: A method of manufacturing a metal-base substrate having an insulative adhesive layer and a conductor layer on a metal-based material is provided. The method includes the steps of dispersing a disperse phase in an insulative adhesive-dispersing medium that contains a wetting dispersant and constitutes the insulative adhesive layer; laminating step of laminating the insulative adhesive on the conductor foil as feeding the roll-shaped conductor foil; curing the insulative adhesive on the conductor foil under heat into a B stage state and thus forming a composite of the conductor foil and the insulative adhesive layer in the B stage state; laminating the metal-based material on the insulative adhesive layer in the B stage state to give a laminate; and then curing the insulative adhesive layer in the B stage state into a C stage state by heat pressurization of the laminate.Type: GrantFiled: April 6, 2011Date of Patent: August 5, 2014Assignee: Denki Kagaku Kogyo Kabushiki KaishaInventors: Taiki Nishi, Takeshi Miyakawa, Katsunori Yashima, Kensuke Okoshi, Hidenori Ishikura
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Publication number: 20140182824Abstract: Disclosed is a heat dissipating component for a semiconductor element, having a tabular body 0.4-6 mm in thickness containing 40-70 volume % of diamond particles, with the balance comprising metal of which the principal component is aluminum, and coated on both surfaces by a coating layer comprising metal of which the principal component is aluminum, or an aluminum-ceramic based composite material, to form an aluminum-diamond based composite body. On at least the two major surfaces thereof are formed, in order from the major surface side, (1) an amorphous Ni alloy layer 0.1-1 ?m in film thickness, (2) an Ni layer 1-5 ?m in film thickness, and (3) an Au layer 0.05-4 ?m in film thickness, the ratio of the Ni alloy layer and the Ni layer (Ni alloy layer thickness/Ni layer thickness) being 0.3 or less.Type: ApplicationFiled: July 17, 2012Publication date: July 3, 2014Applicant: DENKI KAGAKU KOGYO KABUSHIKI KAISHAInventors: Hideki Hirotsuru, Hideo Tsukamoto, Yosuke Ishihara
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Patent number: 8764933Abstract: Provided is a adhesive and an adhesive sheet which exhibit excellent chip-holding properties during dicing and from which chips can be easily stripped during pick up, even when considering changes over time. It is a adhesive composition which contains both (A) a (meth)acrylic acid ester copolymer component that has functional-group containing monomer units and a weight average molecular weight of less than 350,000 and (B) a (meth)acrylic ester copolymer component that has functional-group containing monomer units and a weight average molecular weight of 350,000 to 2,000,000 at a weight ratio of 10:90 to 90:10, and further contains 0.5 to 20 parts by mass of a crosslinking agent per 100 parts by mass of components (A) and (B) in total, the crosslinking agent being a crosslinking agent that reacts with both the functional groups of the component (A) and the functional groups of the component (B).Type: GrantFiled: February 9, 2010Date of Patent: July 1, 2014Assignee: Denki Kagaku Kogyo Kabushiki KaishaInventors: Tomomichi Takatsu, Masashi Kume
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Publication number: 20140167084Abstract: A blue phosphor having an emission peak wavelength different from that of conventional blue phosphors, a method for producing the same, and a high-intensity luminescent device using the phosphor are provided. The phosphor of the present invention is represented by a general formula MeaRebAlcSidOeNf (Me may contain one or more elements selected from Mg, Ca, Sc, Y, and La as second elements, provided that Sr or Ba is contained as an essential first element, and Re may contain one or more elements selected from Mn, Ce, Tb, Yb, and Sm as second elements, provided that Eu is contained as an essential first element), where the composition ratio represented by a, b, c, d, e, and f has the following relations: a+b=1, 0.005<b<0.25, 1.60<c<2.60, 2.50<d<4.05, 3.05<e<5.00, and 2.75<f<4.40.Type: ApplicationFiled: April 2, 2013Publication date: June 19, 2014Applicants: NATIONAL INSTITUTE FOR MATERIALS SCIENCE, DENKI KAGAKU KOGYO KABUSHIKI KAISHAInventors: Go Takeda, Ryo Yoshimatsu, Naoto Hirosaki
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Publication number: 20140158280Abstract: Provided is a method of manufacturing a translucent rigid substrate laminate, which method can improve position precision. Further provided is a translucent rigid substrate bonding apparatus that contributes to improvement of the position precision while increasing production efficiency of a plate-shaped product. In the method of manufacturing a translucent rigid substrate laminate and the translucent rigid substrate bonding apparatus according to the present invention, when translucent rigid substrates are bonded in a predetermined positional relationship by interposing a photo-curable fixing agent including (A) polyfunctional (meth)acrylate, (B) monofunctional (meth)acrylate and (C) a photopolymerization initiator therebetween, the entire fixing agent spreading between the both translucent rigid substrates is cured every time the translucent rigid substrates are bonded.Type: ApplicationFiled: July 13, 2012Publication date: June 12, 2014Applicant: DENKI KAGAKU KOGYO KABUSHIKI KAISHAInventor: Hiroyuki Kurimura
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Publication number: 20140150967Abstract: Provided is a method of manufacturing a translucent rigid substrate laminate, which method can improve position precision while increasing production efficiency. Further provided is a translucent rigid substrate bonding apparatus that contributes to improvement of the position precision while increasing production efficiency of a plate-shaped product. In the method of manufacturing a translucent rigid substrate laminate and the translucent rigid substrate bonding apparatus according to the present invention, when translucent rigid substrates are bonded in a predetermined positional relationship by interposing a photo-curable fixing agent including (A) polyfunctional (meth)acrylate, (B) monofunctional (meth)acrylate and (C) a photopolymerization initiator therebetween, only the fixing agent present in outer peripheral portions of both translucent rigid substrates is cured for provisional fastening.Type: ApplicationFiled: July 13, 2012Publication date: June 5, 2014Applicant: DENKI KAGAKU KOGYO KABUSHIKI KAISHAInventor: Hiroyuki Kurimura
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Patent number: 8742046Abstract: Provided is a maleimide copolymer which exhibits an excellent hue, an effect of imparting high heat resistance, and excellent kneadability. Specifically provided is a maleimide copolymer which comprises 50 to 60 mass % of a styrene monomer unit, 30 to 50 mass % of a maleimide monomer unit, and 0 to 10 mass % of an unsaturated dicarboxylic anhydride monomer unit, and which has a weight-average molecular weight (Mw) of 90,000 to 130,000 and a residual maleimide monomer content of 300 ppm or lower.Type: GrantFiled: January 15, 2010Date of Patent: June 3, 2014Assignee: Denki Kagaku Kogyo Kabushiki KaishaInventors: Tetsuo Noguchi, Koichi Ozawa
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Publication number: 20140141370Abstract: Provided is a suitable toner external additive which has an excellent spacer effect, without causing image defects in repeated image formation and which is suitable in preparing a toner with stable printing properties and to provide a fine spherical silica powder suitable for adding to the toner additive. A fine spherical silica power having an average particle size measured by a laser diffraction/scattering distribution measuring apparatus of 0.090 ?m or more and 0.140 ?m or less, a particle content ratio of 5.0% by mass or more and 25.0% by mass or less when the particle diameter is 0.150 ?m or more, and a particle content ratio of 1.0% by mass or less when the particle diameter is 0.300 ?m or more.Type: ApplicationFiled: January 28, 2014Publication date: May 22, 2014Applicant: DENKI KAGAKU KOGYO KABUSHIKI KAISHAInventors: Shuji SASAKI, Masaaki HIDESHIMA, Hideaki SONODA, Takahisa MIZUMOTO
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VINYLIDENE FLUORIDE RESIN COMPOSITION, RESIN FILM, BACK SHEET FOR SOLAR CELLS, AND SOLAR CELL MODULE
Publication number: 20140137936Abstract: Provided is a vinylidene fluoride resin composition resistant to yellowing in the test for evaluation of durability of moist heat resistance, even when it is laminated directly on an ethylene vinyl acetate copolymer (EVA)-based sealing material, and a resin film, a back sheet for solar cells and a solar cell module comprising the same. A vinylidene fluoride resin composition at least comprising a vinylidene fluoride resin having a peak value ratio of head-to-tail bond to head-to-head bond (head-to-tail bond/head-to-head bond), as determined by 1H-NMR, of 11.5 or less and a mass-average molecular weight (Mw) of 1.30×105 or more, and an antioxidant is processed into a vinylidene fluoride resin film having a thickness of 10 to 200 ?m. The vinylidene fluoride resin film and an electric insulating resin film such as polyethylene terephthalate-based film are laminated, to give a back sheet for solar cells.Type: ApplicationFiled: July 12, 2012Publication date: May 22, 2014Applicant: DENKI KAGAKU KOGYO KABUSHIKI KAISHAInventors: Tatsunori Sumino, Fukumu Komoda, Koji Nakajima -
Publication number: 20140134431Abstract: An adhesive sheet of the invention includes a substrate and an adhesive composition laminated thereon, the substrate including polyvinyl chloride and a polyester-based plasticizer, wherein the adhesive composition includes two different (meth)acrylate copolymer components (A) and (B) in a mass ratio ranging from 10:90 to 90:10, wherein a content of a cross-linking agent which reacts with functional groups of the component (A) and the component (B) is in a range of 0.5 to 20 mass parts with respect to 100 mass parts of a sum of the component (A) and the component (B), and wherein 10 to 95 mass % of the monomer unit composing the component (A) is 2-ethylhexyl acrylate, and 10 to 95 mass % of the monomer unit composing the component (B) is butyl acrylate.Type: ApplicationFiled: May 28, 2012Publication date: May 15, 2014Applicant: Denki Kagaku Kogyo Kabushiki KaishaInventors: Takeshi Saito, Tomomichi Takatsu