Patents Assigned to Asahi Kasei Kogyo Kabushiki Kaisha
  • Patent number: 6228800
    Abstract: A noble metal-supported article which comprises a carrier and a palladium-containing metal component supported on the carrier, which article has (A) a layer in which substantially no palladium is supported in the interior of the carrier and (B) a layer in which palladium is supported in the region from the outer surface to a depth of less than 100 &mgr;m of the carrier.
    Type: Grant
    Filed: May 26, 1999
    Date of Patent: May 8, 2001
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Tatsuo Yamaguchi, Setsuo Yamamatsu, Hiroshige Okamoto
  • Patent number: 6221946
    Abstract: A polyoxymethylene resin composition which comprises (A) 70-99.89% by weight of a polyoxymethylene resin, (B) 0.1-20% by weight of at least one ethylene-substituted vinyl copolymer having a melting point of 40-80° C. and prepared by polymerization using a radical polymerization catalyst, a chromium-containing catalyst or a Ziegler catalyst, and (C) 0.01-10% by weight of at least one liquid ethylene-&agr;-olefin random copolymer. The resin composition of the present invention is small in friction coefficient and excellent in abrasion resistance under high load and high temperature against noncrystalline resins.
    Type: Grant
    Filed: October 23, 1998
    Date of Patent: April 24, 2001
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Masahiko Niino, Sadao Ibe
  • Patent number: 6214954
    Abstract: Disclosed is an olefin polymerization catalyst comprising: a transition metal compound comprising one transition metal selected from the group consisting of Ti, Zr and Hf, and at least two ligands, wherein one ligand is a group having a cyclopentadienyl skeleton, and the remaining at least one ligand is a monovalent, bidentate, anionic chelating ligand having two coordinating atoms each coordinated to the transition metal, one of which atoms is selected from the group consisting of O, S, Se and Te, and the other of which atoms is selected from the group consisting of N, S, Se and Te, and wherein one of the remaining at least one ligand is optionally bonded to the group having a cyclopentadienyl skeleton through a bridging group. Also disclosed is a method for efficiently producing an olefin homopolymer or olefin copolymer by using this catalyst.
    Type: Grant
    Filed: June 12, 1997
    Date of Patent: April 10, 2001
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Yu Nitto, Tokitaka Kaneshima, Toshiya Aoki
  • Patent number: 6207746
    Abstract: A process for producing a thermoplastic polymer composition comprising: (1) 100 parts by weight of an olefin polymer which comprises ethylene and at least one &agr;-olefin having 3 to 10 carbon atoms and in which the density is in the range of 0.85 to 0.91 g/cm3 and the molecular weight distribution (Mw/Mn) which is the ratio of weight average molecular weight (Mw) and number average molecular weight (Mn) as calculated by a gel permeation chromatography (GPC) is less than 3.5, (2) 5 to 300 parts by weight of a propylene polymer, (3) 5 to 250 parts by weight of an oil, and (4) 0.02 to 3 parts by weight of a radical initiator, which process comprises steps of previously mixing and heat-kneading the olefin polymer, the propylene polymer and the radical initiator; adding the oil in the stage in which cross-linking is at a proportion of 30 to 95% based on the cross-linking degree of the composition to be finally obtained; and further melt-kneading them to cross-link the same.
    Type: Grant
    Filed: April 5, 1999
    Date of Patent: March 27, 2001
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Kensuke Uchida, Shinichi Shibayama
  • Patent number: 6206988
    Abstract: Hexanitrohexaazaisowurtzitane-containing compositions which comprise hexanitrohexaazaisowurtzitane, polynitropolyacetylhexaazaisowurtzitanes and one or more of oxaisowurtzitane compounds represented by the specified formulae. The explosive compositions which contain the hexanitrohexaazaisowurtzitane-containing compositions have improved handling safety by lowering their sensitivity without degrading combustibility and detonability.
    Type: Grant
    Filed: May 26, 1999
    Date of Patent: March 27, 2001
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventor: Hakobu Bazaki
  • Patent number: 6198197
    Abstract: A surface acoustic wave functional element is provided that includes a piezoelectric substrate or a multilayer piezoelectric substrate having a large electromechanical coupling coefficient. Semiconductor layers are formed on the piezoelectric substrate. The semiconductor layers include an active layer and a buffer layer. The buffer layer is formed of a structure that has a lattice constant that is the same as or similar to that of the active layer. In addition, input and output electrodes are formed on both sides of the semiconductor layers. The surface acoustic wave functional element attains a large amplification gain at low voltage, and can be used as part of a transmitting/receiving circuit in a high frequency portion of a mobile communication device.
    Type: Grant
    Filed: February 7, 2000
    Date of Patent: March 6, 2001
    Assignees: Asahi Kasei Kogyo Kabushiki Kaisha, Kazuhiko Yamanouchi
    Inventors: Kazuhiko Yamanouchi, Naohiro Kuze, Yoshihiko Shibata, Yasuhito Kanno
  • Patent number: 6194808
    Abstract: The surface acoustic wave functional element comprises a semiconductor layer provided on a piezoelectric substrate or a piezoelectric film substrate and makes use of interaction between a surface acoustic wave propagating on the substrate and electrons in the substrate layer, but has the semiconductor layer disposed outside above the propagation path for propagating a surface acoustic wave, comprises a plurality of grating electrodes perpendicularly above and to the propagation path and moreover the semiconductor layer comprises an active layer and a buffer layer lattice-matching thereto. By use of this surface acoustic wave functional element, a surface acoustic wave amplifier capable of providing a high amplification gain at a practical low voltage, a surface acoustic wave convolver having a higher efficiency than ever or the like are offered.
    Type: Grant
    Filed: January 12, 2000
    Date of Patent: February 27, 2001
    Assignees: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Kazuhiko Yamanouchi, Hiroyuki Odagawa, Wasuke Sato, Naohiro Kuze, Hiromasa Goto
  • Patent number: 6191207
    Abstract: A polyamide resin composition comprising: from 30 to 70% by weight of a polyamide resin having a crystallization temperature not higher than 210° C.; and from 70 to 30% by weight of glass fiber having an average aspect ratio of from 10 to 20, and an average fiber diameter of from 15 to 30 &mgr;m. Also disclosed is a polyamide resin molded article comprising: from 30 to 70% by weight of a polyamide resin having a crystallization temperature not higher than 210° C.; and from 70 to 30% by weight of glass fiber having an average aspect ratio of from 9 to 18, and an average fiber diameter of from 15 to 30 &mgr;m.
    Type: Grant
    Filed: December 17, 1998
    Date of Patent: February 20, 2001
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Osamu Fujii, Harumi Watanabe
  • Patent number: 6190430
    Abstract: An efficient method for producing a hydrogen-containing gas for a fuel cell by using a gas produced by reforming reaction of an organic compound is disclosed. The method comprises the following steps: adding an oxygen-containing gas to a hydrogen-containing gas containing carbon monoxide to form a mixed gas, and bringing the mixed gas into contact with a catalyst comprising a ruthenium metal as a main component and having a carbon monoxide adsorption of not less than 1 mmol/g-ruthenium and a carbon monoxide adsorption index of not less than 0.5, to thereby oxidize and remove carbon monoxide.
    Type: Grant
    Filed: January 14, 1999
    Date of Patent: February 20, 2001
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Yohei Fukuoka, Keizo Tomokuni, Hitoshi Nakajima
  • Patent number: 6190578
    Abstract: An anisotropic conductive composition, which comprises one part by weight of copper alloy powders having an oxygen content of 10 to 10,000 ppm and 0.5 to 250 parts by weight of an organic binder, wherein a copper compound exists on the surfaces of particles of the copper alloy powders.
    Type: Grant
    Filed: August 4, 1998
    Date of Patent: February 20, 2001
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Akinori Yokoyama, Toru Mori
  • Patent number: 6187809
    Abstract: Compounds having a &bgr;-3 adrenaline receptor agonist and are useful as drugs for the treatment and prevention of diabetes, obesity, hyperlipemia, etc., represented by a general formula (I) and salts thereof, and a process for producing these, and their intermediates, wherein R represents hydrogen or methyl; R1 represents hydrogen, halogen, hydroxy, benzyloxy, amino, or hydroxymethyl; R2 represents hydrogen, hydroxymethyl, NHR3, SO2NR4R4, or nitro; R6 represents hydrogen or lower alkyl; and X represents nitrogen, R9 represents hydrogen, one of R7 and R8 represent hydrogen, and the other thereof represents hydrogen, amino, acetylamino, or hydroxy.
    Type: Grant
    Filed: December 28, 1999
    Date of Patent: February 13, 2001
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Shiro Miyoshi, Kohei Ogawa
  • Patent number: 6188824
    Abstract: The present invention relates to a multicore plastic optical fiber for optical signal transmission, which comprises a plurality of cores made of a transparent resin; first cladding layers made of a transparent first cladding resin having a lower refractive index than said core resin, each of said first cladding layers coating said each core; and a second cladding resin surrounding said cores with said first cladding layers, and having a lower refractive index than said first cladding resin. The multicore plastic optical fiber of the present invention is suitably applicable to optical signal transmission since it receives a large quantity of light and exhibits a small light loss upon bending.
    Type: Grant
    Filed: June 29, 1999
    Date of Patent: February 13, 2001
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventor: Shinichi Teshima
  • Patent number: 6187264
    Abstract: A solution for preserving and/or disinfecting a contact lens characterized by containing polylysine.
    Type: Grant
    Filed: August 26, 1998
    Date of Patent: February 13, 2001
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Nobuyuki Osawa, Seiichiro Ikawa
  • Patent number: 6184381
    Abstract: This document describes a novel and practically excellent process for the preparation of optically active compounds, such as optically active alcohols or amines which are useful for various applications, for example, as synthetic intermediates of pharmaceuticals, liquid crystal materials, and reagents for optical resolution, wherein a hydrogen transfer type asymmetric reduction is carried out in the presence of both a transition metal complex and an optically active nitrogen compound or a transition metal complex having an optically active nitrogen compounds as an asymmetric ligand, and a hydrogen-donating organic or inorganic compound.
    Type: Grant
    Filed: September 29, 1998
    Date of Patent: February 6, 2001
    Assignees: Japan Science & Technology Corp., NKK Corp., Takeda Chemical Industries, Asahi Kasei Kogyo Kabushiki Kaisha, Takasago Intl. Corp.
    Inventors: Takao Ikariya, Shohei Hashiguchi, Jun Takehara, Nobuyuki Uematsu, Kazuhiko Matsumura, Ryoji Noyori, Akio Fujii
  • Patent number: 6176510
    Abstract: An elastomer composition which comprises (a) 100 parts by weight of a hydrogenated block copolymer mixture comprising: (a-1) 10 to 60 parts by weight of a block copolymer prepared by hydrogenating a block copolymer that comprises: at least two polymer blocks A each mainly comprising a vinyl aromatic compound; and at least one polymer block B mainly comprising a conjugated diene compound, the hydrogenated block copolymer having a number average molecular weight of from more than 200,000 to not more than 400,000 and a content of the polymer block A of from 15 to 40% by weight of said block copolymer; and (a-2) 40 to 90 parts by weight of a block copolymer prepared by hydrogenating a block copolymer that comprises: at least one polymer block A mainly comprising a vinyl aromatic compound; and at least one polymer block B mainly comprising a conjugated diene compound, the hydrogenating block copolymer having a number average molecular weight of from more than 30,000 to not more than 140,000 and a content of the po
    Type: Grant
    Filed: November 18, 1998
    Date of Patent: January 23, 2001
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Tetsuo Masubuchi, Mitsuhiro Tanaka
  • Patent number: 6175025
    Abstract: A di-substituted metallocene compound having good quality can be synthesized completely at a low cost in a high yield in a easy manner by reacting a metallocene dihalide with a Grignard reagent which is a compound represented by formula (I): RMgX (wherein R represents an aryl, benzyl or diaryl phosphinomethylene group which may have a substituent and X represents a halogen element) under specified conditions.
    Type: Grant
    Filed: February 23, 2000
    Date of Patent: January 16, 2001
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Yuichi Kitagawa, Koji Otaka, Tomoya Kubo, Eiji Takeichi
  • Patent number: 6172158
    Abstract: The vinylidene chloride-based latex of the invention has a chlorine ion content reduced to or below 500 ppm based on the total concentration of all solid matter in the latex by weight, preferably by dialysis, and has excellent resistance to hot water treatment.
    Type: Grant
    Filed: October 20, 1999
    Date of Patent: January 9, 2001
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Hideki Sakai, Yukio Yamawaki, Masahisa Yokota
  • Patent number: 6171748
    Abstract: A lithoprinting plate comprising a support and a recording layer which comprises a polyvalent metal ion and a hydrophilic binder polymer having a Lewis base portion containing nitrogen, oxygen or sulfur and which has an oleophilic image area and a hydrophilic non-image area which are printed in a thermal mode, wherein the hydrophilic binder polymer in the hydrophilic non-image area is three-dimensionally cross-linked by the interaction between the polyvalent metal ion and the Lewis base portion.
    Type: Grant
    Filed: June 25, 1999
    Date of Patent: January 9, 2001
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Migaku Tanaka, Kei Tomeba
  • Patent number: 6172099
    Abstract: Compounds represented by general formula (I) or their salts, having &bgr;3-adrenoceptor agonism and being efficacious when employed in drugs for treating and preventing diabetes, obesity, hyperlipemia, etc. wherein R represents hydrogen or methyl; R1 represents hydrogen, halogeno, hydroxy, benzyloxy, amino or hydroxymethyl; R2 represents hydrogen, hydroxymethyl, NHR3, SO2NR4R4 ′ or nitro (wherein R3 represents hydrogen, methyl, SO2R5, formyl or CONHR6′; R5 represents lower alkyl, benzyl or NR4R4′; R4 and R4′ may be the same or different and each represents hydrogen, lower alkyl or benzyl; and R6′ represents hydrogen or lower alkyl); R6 represents hydrogen or lower alkyl; n is 1 or 2; X represents secondary nitrogen, oxygen or sulfur; and when n is 1, then one of R7 and R8 represents hydrogen while another represents hydrogen, amino, acetylamino or hydroxy, or when n is 2, then R8 represents hydrogen while R7 represents hydrogen, amino, acetylamino or hydroxy.
    Type: Grant
    Filed: March 27, 2000
    Date of Patent: January 9, 2001
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Shiro Miyoshi, Kohei Ogawa
  • Patent number: 6168858
    Abstract: A polyethylene microporous film which is composed of a linear copolymeric polyethylene having a melt index (MI) of less than 0.1 and a propylene unit content of 0.1 to 4 mol % and which has a fuse temperature of less than 136° C. A polyethylene microporous film which is composed of a mixture of a linear copolymeric polyethylene having a melt index (MI) of less than 0.1 and a propylene unit content of 0.1 to 4 mol % and a high density polyethylene having a comonomer unit content of less than 0.1 mol %, said mixture having a weight average molecular weight of 250,000 to 700,000 and a propylene unit content of 0.1 to 4 mol %, and which has a fuse temperature of less than 136° C.
    Type: Grant
    Filed: June 5, 1998
    Date of Patent: January 2, 2001
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Takuya Hasegawa, Takahiko Kondo