Patents Assigned to Asahi Kasei Kogyo Kabushiki Kaisha
  • Patent number: 6069206
    Abstract: Disclosed is an aromatic polycarbonate-styrene polymer resin composition comprising (A) an aromatic polycarbonate, (B) a specific rubber-modified styrene polymer and (C) a compatibility agent which is a copolymer containing an aromatic vinyl monomer and which has a non-uniform distribution with respect to the proportions of component monomers constituting the copolymer, so that the copolymer comprises copolymer molecules having different solubility parameter (SP) values, wherein the difference in SP value between the copolymer molecule having a maximum SP value and the copolymer molecule having a minimum SP value is from 0.4 to 0.6 (cal/cm.sup.3).sup.1/2, and wherein the copolymer has an average SP value of from 10.6 to 11.0 [(cal/cm.sup.3).sup.1/2 ].
    Type: Grant
    Filed: December 30, 1997
    Date of Patent: May 30, 2000
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Hajime Nishihara, Akihiro Watanabe
  • Patent number: 6065329
    Abstract: An apparatus for detecting leakage through a filtration membrane which comprises a gas-supplying source for supplying a gas to one of two spaces formed by partition with the filtration membrane, a gas-detecting device for measuring the degree of leakage of the gas into the other space, and further preventing the undesirable influence of the supplied gas on the gas-detecting device.
    Type: Grant
    Filed: June 24, 1999
    Date of Patent: May 23, 2000
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Seiji Fukada, Takao Itose
  • Patent number: 6063728
    Abstract: An ammoxidation catalyst comprising a compound oxide of Mo, V, Nb, and at least one element selected from the group consisting of Te and Sb, wherein the compound catalyst exhibits an X-ray diffraction pattern satisfying the following relationship:0.40.ltoreq.R.ltoreq.0.75wherein R represents the intensity ratio defined by the following formula:R=P.sub.1 /(P.sub.1 +P.sub.2)wherein P.sub.1 and P.sub.2 represent the intensities of peak 1 and peak 2 appearing at diffraction angles (2.theta.) of 27.3.+-.0.3.degree. and 28.2.+-.0.3.degree., respectively.By the use of the ammoxidation catalyst of the present invention, not only can acrylonitrile or methacrylonitrile be produced in high yield, but also oxidative decomposition of ammonia feedstock into nitrogen can be effectively suppressed, thereby enabling an improved utilization of ammonia as a feedstock.
    Type: Grant
    Filed: August 5, 1998
    Date of Patent: May 16, 2000
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Hidenori Hinago, Satoru Komada
  • Patent number: 6060632
    Abstract: A process for producing ethylated benzene by a reaction of benzene with ethylene in the presence of a catalyst containing a zeolite .beta. by using a fixed-bed ascending-flow type reactor, which comprisesa) carrying out the reaction under conditions under which ethylene bubbles are present at the inlet of a catalyst layer when ethylene is fed upward from under the catalyst layer,b) recovering reaction products as a liquid from the upper part of the reactor and at the same time taking out a distillate composed mainly of unreacted benzene therefrom as vapor, andc) adjusting the temperature of the catalyst layer at its inlet to a temperature at least 50.degree. C. lower than the maximum attained temperature of the catalyst layer.
    Type: Grant
    Filed: January 14, 1999
    Date of Patent: May 9, 2000
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Yoshikazu Takamatsu, Hiroshi Ishida, Yoshihito Itani
  • Patent number: 6056935
    Abstract: The invention provides an iron sulfide characterized in that it comprises FeS.sub.2, Fe.sub.1-x S, Fe.sub.3 O.sub.4 and FeSO.sub.4, and that the secondary particles thereof, have a 50% volume-cumulative particle diameter of from 20 to 300 .mu.m. The invention also provides a process for producing an iron sulfide comprising the steps of introducing (a) ferrous sulfate monohydrate having a d.sub.50 of from 20 to 300 .mu.m and (b) not less than stoichiometric amount of at least one sulfur compound selected from elemental sulfur and hydrogen sulfide into the fluidized bed of a furnace and then fluidizing, burning, and reacting the ingredients at a temperature of from 350 to less than 630.degree. C., a superficial velocity of 0.1 m/sec or higher, and a pressure of 1 atm or higher using air as a fluidizing gas.
    Type: Grant
    Filed: November 24, 1997
    Date of Patent: May 2, 2000
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Tadashi Kai, Yuji Matsue, Masaaki Sakurai, Kunihiro Imada, Kenji Inokuchi
  • Patent number: 6054498
    Abstract: A microporous film comprising a high-density polyethylene and a linear copolymer polyethylene and having a terminal vinyl group concentration of 2 or more per 10,000 carbon atoms in the polyethylene, as measured by an infrared spectroscopic method.
    Type: Grant
    Filed: June 24, 1998
    Date of Patent: April 25, 2000
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Takuya Hasegawa, Takahiko Kondo
  • Patent number: 6051307
    Abstract: A molded article comprising:(1) 70 to 99.5% by weight of a thermoplastic resin, and(2) 0.5 to 30% by weight of carbon fibers;wherein the carbon fiber comprises,(a) carbon fibers having a length of more than 1.5 mm being contained in an amount of 0.1 to 4.7% by weight,(b) carbon fibers having a length of 0.5 to 1.5 mm being contained in an amount of 0.2 to 10.7% by weight, and(c) carbon fibers having a length of less than 0.5 mm being contained in an amount of 0.2 to 14.6% by weight, wherein the weight % is based on the total amount of the thermoplastic resin and the carbon fibers.
    Type: Grant
    Filed: February 2, 1999
    Date of Patent: April 18, 2000
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Toshirou kido, Shinji Hasegawa
  • Patent number: 6051650
    Abstract: A rubber-reinforced thermoplastic resin composition is disclosed. The rubber-reinforced thermoplastic resin composition comprises a thermoplastic resin matrix having dispersed therein particles of a graft polymer, the particles of a graft polymer comprising particles of a rubber polymer having emulsion-graft-polymerized to the surface thereof two or more kinds of vinyl compounds copolymirizable with the rubber polymer, wherein the surface graft coverage of the vinyl compounds graft-polymerized to the surface of the particles of a rubber polymer as determined by equation (m1) is 80% or more and the average thickness of the vinyl compounds graft-polymerized to the surface of the particles of a rubber polymer is from 5 to 25 nm:Surface graft coverage (%)=(s2/s1).times.
    Type: Grant
    Filed: March 17, 1998
    Date of Patent: April 18, 2000
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Shigeru Endo, Makiko Nagao, Toshinori Yamanaka
  • Patent number: 6046524
    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 clement 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: July 22, 1998
    Date of Patent: April 4, 2000
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Kazuhiko Yamanouchi, Naohiro Kuze, Yoshihiko Shibata, Yasuhito Kanno
  • Patent number: 6045883
    Abstract: A resin composition comprising a polypropylene resin, a polyphenylene ether resin and a compatibility agent wherein dispersion particles comprising the polyphenylene ether resin (b) are dispersed in a matrix comprising the polypropylene resin (a), a minor diameter of the dispersion particles is 2 .mu.m or less, and the ratio of major diameter/minor diameter is 1-10.
    Type: Grant
    Filed: December 8, 1997
    Date of Patent: April 4, 2000
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Yoshikuni Akiyama, Osamu Shoji, Yuji Kusumi
  • Patent number: 6046018
    Abstract: The present invention relates to an assay method of chiroinositol which comprises reacting a specimen containing chiroinositol with1) a dehydrogenase, which catalyses at least reversible reaction with a substrate of chiroinositol in the presence of a coenzyme selected from NAD(P)s and a coenzyme selected from thio-NAD(P)s,2) A1 and3) B1to form cycling reaction of the formula ##STR1## wherein a product is a compound, from which 2 or 4 hydrogen atoms are deleted from chiroinositol, A1 is NAD(P)s or thio-NAD(P)s, A2 is a reduced form of A1, B1 is a reduced form of NAD(P)s in case of A1 being thio-NAD(P)s or a reduced form of thio-NAD(P)s in case of A1 being NAD(P)s and B2 is an oxidized form of B1, and determining an amount of converted A2 or B1 by the said reaction, and a composition for assay of chiroinositol. Chiroinositol can be assayed by accurate, simple, low price and high sensitive method.
    Type: Grant
    Filed: June 8, 1999
    Date of Patent: April 4, 2000
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Takuji Kozuma, Mamoru Takahashi
  • Patent number: 6043186
    Abstract: An ammoxidation catalyst comprising a compound oxide which contains, in specific atomic ratios, molybdenum; vanadium; niobium; at least one element selected from tellurium and antimony; and at least one element selected from ytterbium, dysprosium, erbium, neodymium, samarium, lanthanum, praseodymium, europium, gadolinium, terbium, holmium, thulium, lutetium and scandium. By the use of the ammoxidation catalyst of the present invention, the ammonia-based yield of acrylonitrile or methacrylonitrile can be largely increased without sacrificing the propane- or isobutane-based yield of acrylonitrile or methacrylonitrile. Thus, the feed-stock ammonia can be efficiently utilized in the ammoxidation of propane or isobutane while achieving an efficient utilization of propane or isobutane.
    Type: Grant
    Filed: October 15, 1998
    Date of Patent: March 28, 2000
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Satoru Komada, Kazuyuki Hamada
  • Patent number: 6041096
    Abstract: A method and an apparatus for total reflection X-ray fluorescence spectroscopy which facilitates total reflection X-ray fluorescent spectroscopy of a sample having irregularities.
    Type: Grant
    Filed: February 6, 1998
    Date of Patent: March 21, 2000
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Ichiro Doi, Shoichiro Tonomura
  • Patent number: 6040472
    Abstract: Disclosed is a novel catalyst for use in producing a carboxylic ester from an aldehyde, an alcohol and molecular oxygen, which comprises a carrier having supported thereon Pd and Pb in a Pd/Pb atomic ratio (S) of 3/0.7.ltoreq.S.ltoreq.3/1.3, and which exhibits a maximum intensity peak at a diffraction angle (2.theta.) in the range of from 38.55.degree. to 38.70.degree. in a powder X-ray diffraction pattern thereof, wherein the peak is ascribed to the (111) crystal face diffraction of a Pd--Pb intermetallic compound.
    Type: Grant
    Filed: October 23, 1997
    Date of Patent: March 21, 2000
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Setsuo Yamamatsu, Tatsuo Yamaguchi, Koshiro Yokota
  • Patent number: 6037437
    Abstract: A method for producing an aromatic polycarbonate which comprises subjecting to a transesterification polymerization reaction at least one polymerizable material selected from a molten monomer mixture of an aromatic dihydroxy compound and a diaryl carbonate, and a molten prepolymer obtained from the monomer mixture, wherein the transesterification reaction is performed in one or more polymerizers which is or are connected through a pipeline system toward an outlet for a final aromatic polycarbonate product, wherein the pipeline system comprises one or more pipes through which a molten aromatic polycarbonate having a number average molecular weight increased by the transesterification polymerization reaction is passed while contacting an inner wall of the pipe or pipes, and wherein a molten aromatic polycarbonate having a number average molecular weight of less than 2,500 is passed through the pipe or pipes at a velocity of 0.05 m/sec.
    Type: Grant
    Filed: December 9, 1997
    Date of Patent: March 14, 2000
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Kyosuke Komiya, Kazumi Hasegawa
  • Patent number: 6036880
    Abstract: Disclosed is a niobium(Nb)-containing aqueous solution for use in producing a Nb-containing oxide catalyst, wherein the oxide catalyst comprises an oxide of a plurality of active component elements including Nb and is for use in a catalytic oxidation or ammoxidation of propane or isobutane in the gaseous phase, and wherein the oxide catalyst is prepared by a process comprising mixing the Nb-containing aqueous solution with (an) aqueous mixture(s) containing compounds of active component elements of the oxide catalyst other than Nb, to thereby provide an aqueous compound mixture, and drying the aqueous compound mixture, followed by calcination. The Nb-containing aqueous solution comprises water having dissolved therein a dicarboxylic acid, an Nb compound and optionally ammonia, wherein the dicarboxylic acid/Nb molar ratio (.alpha.) satisfies: 1.ltoreq.(.alpha.).ltoreq.4, and the ammonia/Nb molar ratio (.beta.) satisfies: 0.ltoreq.(.beta.).ltoreq.2.
    Type: Grant
    Filed: August 5, 1998
    Date of Patent: March 14, 2000
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Satoru Komada, Hidenori Hinago, Masatoshi Kaneta, Mamoru Watanabe
  • Patent number: 6037362
    Abstract: Compounds having a .beta.-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; R.sup.1 represents hydrogen, halogen, hydroxy, benzyloxy, amino, or hydroxymethyl; R.sup.2 represents hydrogen, hydroxymethyl, NHR.sup.3, SO.sub.2 NR.sup.4 R.sup.4', or nitro; R.sup.6 represents hydrogen or lower alkyl; and X represents nitrogen, R.sup.9 represents hydrogen, one of R.sup.7 and R.sup.8 represent hydrogen, and the other thereof represents hydrogen, amino, acetylamino, or hydroxy.
    Type: Grant
    Filed: August 5, 1998
    Date of Patent: March 14, 2000
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Shiro Miyoshi, Kohei Ogawa
  • Patent number: 6034283
    Abstract: A process for producing a cyclic alcohol by a catalytic hydration reaction of a starting cyclic olefin represented by the following formula (1) and water:C.sub.s H.sub.2s-2-t R.sub.t (1)wherein R is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, a phenyl group or a cyclohexyl group; s is an integer of 5 to 12; and t is an integer of 1 to 4, which comprises supplying a part or the whole of a residue left after separation of said cyclic alcohol from an oil phase containing said cyclic alcohol, unreacted cyclic olefin and impurities having a boiling point between the boiling point of said starting cyclic olefin and that of said cyclic alcohol to a distillation column(s), and recycling the unreacted cyclic olefin obtained after removal of said impurities.
    Type: Grant
    Filed: July 8, 1998
    Date of Patent: March 7, 2000
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Masakazu Ban, Mineyuki Iwasaki
  • Patent number: 6034060
    Abstract: The peptide of the present invention comprises a specific amino acid sequence including at least 118 amino acids and has the ability to promote the activation of protein C by thrombin. The peptide of the present invention can be produced efficiently on a large scale by recombinant DNA techniques. The peptide of the present invention has anticoagulant, platelet aggregation-inhibiting and thrombolytic activities, without exhibiting side effects such as bleeding and anaphylactic shock. Therefore, the peptide of the present invention can be effectively used for the treatment of various circulatory organ diseases, toxemia of pregnancy and the like.
    Type: Grant
    Filed: January 14, 1994
    Date of Patent: March 7, 2000
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Shuji Yamamoto, Koji Suzuki
  • Patent number: 6030749
    Abstract: A photosensitive resin composition comprising (A) a binder polymer and/or a prepolymer; (B) an ethylenically unsaturated compound; (C) a radical producer capable of producing a free radical upon exposure to an ultraviolet ray of 300 to 400 nm; and (D) an anthraquinone dye capable of exhibiting a color change upon exposure to an ultraviolet ray having a wavelength in the range of 300 to 400 nm in the presence of the radical producer (C). This photosensitive resin composition, upon exposure through a negative mask to an ultraviolet ray of a wavelength in a specific range and of a quantity larger than a threshold value, can form a photoresin product having image and non-image portions which are different in color from each other, and, hence, this composition can advantageously be used in the fields of printing plates and resists.
    Type: Grant
    Filed: March 20, 1992
    Date of Patent: February 29, 2000
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventor: Katsuhiro Takahashi