Denki Kagaku Kogyo Kabushiki Kaisha | Date: 2015-08-12
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.
Denki Kagaku Kogyo Kabushiki Kaisha and Saffil Ltd | Date: 2015-09-09
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 Al_(2)O_(3) in an amount of 70% or more and less than 90% and having a total pore volume of 0.0055 mL/g or less.
Denki Kagaku Kogyo Kabushiki Kaisha | Date: 2016-01-13
Provided is a boron-nitride powder that is suitable for use in a resin composition for transmitting heat from a heat-producing electronic component such as a power device to a heat-dissipating member. In particular, said boron-nitride powder is useful in a resin composition for a thermal interface material or insulating layer for a printed circuit board. Furthermore, this boron-nitride powder reduces thermal-conductivity anisotropy and thermal contact resistance, resulting in high thermal conductivity. This boron-nitride powder contains boron-nitride particles each consisting of hexagonal boron-nitride primary particles joined together. The boron-nitride powder, which is an aggregate of said boron-nitride particles, exhibits a mean sphericity of at least 0.70, a mean particle diameter of 20-100 m, a porosity of 50-80%, a mean pore diameter of 0.10-2.0 m, a maximum pore diameter of at most 10 m, and a calcium content of 500-5,000 ppm. Under X-ray powder diffraction, the graphitization index of the boron-nitride powder is preferably between 1.6 and 4.0, inclusive, and the peak intensity ratio (I(002)/I(100)) between the (002) plane and the (100) plane is preferably at most 9.0.
Denki Kagaku Kogyo Kabushiki Kaisha | Date: 2016-02-03
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 %.
Denki Kagaku Kogyo Kabushiki Kaisha | Date: 2015-01-14
An object of the present invention is to provide a polychloroprene latex with improved rubber coagulability that gives a film superior in strength by dip molding, a polychloroprene latex composition, and a molded article. The polychloroprene latex is prepared by polymerization of 2-chloro-1,3-butadiene alone or by polymerization of raw monomers at least containing 2-chloro-1,3-butadiene and 2,3-dichloro1,3-butadiene and has a precipitation rate of 5 to 40%, as calculated according to Equation (I). In Equation (I), A is the mass (g) of the dry product, which is obtained by adding 50 ml of saturated aqueous solution of calcium hydroxide at 23C to 50 g of a latex having a solid matter concentration adjusted to 45 to 65 mass % at a liquid temperature of 23C over 2 minutes, filtering and collecting the generated precipitate with a 80-mesh wire mesh, and drying the precipitate at 110C for 3 hours; B is the mass of the latex before the dropwise addition (50 g); and C is the solid matter concentration (mass %) of the latex before the dropwise addition.
Denki Kagaku Kogyo Kabushiki Kaisha | Date: 2016-02-24
An object of the present invention is to provide a phosphor emitting yellow light having much red and green components and a light-emitting device comprising the phosphor that is superior in color rendering property. The present invention provides a phosphor having a garnet structure represented by General Formula: Lu_(a)Ce_(b)Al_(c)Si_(d)O_(e)N_(f). However in the General Formula above, a to f satisfy the following conditions: 1.50 a 3.15; 0.05 b 1.50; 2 a+b 4; 4.0 c 7.0; 0.0 < d < 0.1; 7.0 e 16.0; 0.001 f 1.0; and 10 e+f 16.
Denki Kagaku Kogyo Kabushiki Kaisha | Date: 2015-09-23
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.
Denki Kagaku Kogyo Kabushiki Kaisha | Date: 2015-06-10
A copolymer for improving heat resistance of a methacrylic resin which can achieve preservation of excellent transparency of the methacrylic resin and improvement in heat resistance, and can provide a molded product having excellent appearance, by adding the copolymer to the methacrylic resin, is provided. According to the present invention, a copolymer for improving heat resistance of a methacrylic resin, including: 45 to 85 mass% of an aromatic vinyl monomer unit; 5 to 45 mass% of a (meth)acrylic acid ester monomer unit; and 10 to 20 mass% of an unsaturated dicarboxylic acid anhydride monomer unit; wherein the copolymer has a total light transmittance of 88% or more, the total light transmittance being measured in accordance with ASTM D1003 for a sample with 2 mm-thickness, is provided.
Denki Kagaku Kogyo Kabushiki Kaisha | Date: 2015-08-26
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 byFormula :A_(w)Al_(x)C_(y): Ce_(z),in Formula , A=(Lu_(a),Y_(b)), a+b=1, 0
Sekisui Chemical Co. and Denki Kagaku Kogyo Kabushiki Kaisha | Date: 2015-09-09
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.