Patents Assigned to Mitsui
  • Process for producing propylene block copolymer
    Patent number: 4739015
    Abstract: A process for producing a propylene block copolymer in the presence of a highly stereospecific olefin polymerization catalyst which comprises producing a crystalline polymer or copolymer of propylene in a first stage and random-copolymerizing propylene and another alpha-olefin in a mole ratio of from 10:90 to 90:10 in the presence of the propylene polymer or copolymer in a second stage; wherein in the random copolymerization, 0.0001 to 0.5 mole, per gram atom of aluminum in the catalyst, of an oxygen-containing compound being gaseous in a standard condition or 0.001 to 1 mole, per gram atom of aluminum in the catalyst, of an active hydrogen-containing compound being liquid or solid in a standard condition is fed into the random-copolymerization reaction system.
    Type: Grant
    Filed: September 12, 1985
    Date of Patent: April 19, 1988
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Akinori Toyota, Norio Kashiwa, Haruyuki Koda, Matsunao Maeda
  • Method for installing offshore jack-up structures
    Patent number: 4735526
    Abstract: A method for installing an offshore jack-up structure having a buoyant platform to be towed and a plurality of legs, the method comprising the steps of:(a) providing a pair of ultrasonic transmitter-receivers on a longitudinal and horizontal center line of the platform,(b) providing of ultrasonic transmitters on a longitudinal and horizontal center line of a target structure to which the rig is approached; and(c) receiving signals transmitted from the ultrasonic transmitters of the target structure by the ultrasonic transmitter-receivers of the platform to determine a relative distance between the rig and the target structure.
    Type: Grant
    Filed: September 24, 1986
    Date of Patent: April 5, 1988
    Assignee: 501 Mitsui Ocean Development & Engineering Co.
    Inventors: Akira Kawagoe, Jun Akiyama, Hiromitsu Tateishi
  • Novel benzoquinone derivatives and production process thereof as well as use as color-developers suitable for recording materials
    Patent number: 4735744
    Abstract: Disclosed herein is a novel benzoquinone derivative represented by the following general formula (I): ##STR1## wherein R.sub.1 means an alkyl or cycloalkyl group, R.sub.2 denotes an alkyl or cycloalkyl group, a phenyl group which may optionally contain one or more halogen atoms and/or alkyl, cycloalkyl, alkoxy, alkylene, phenoxy, phenyl and/or biphenylyl groups, or a benzyl or naphthyl group which may optionally contain one or more methyl groups. This compound is useful as an oxidative color-developing agent for recording materials.
    Type: Grant
    Filed: May 28, 1985
    Date of Patent: April 5, 1988
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Michihiro Tsujimoto, Kiyoharu Hasegawa, Hiroyuki Akahori, Eishi Tanaka, Makoto Asano
  • Zinc-alkaline battery
    Patent number: 4735876
    Abstract: This invention uses a zinc alloy containing In, one element of Al or Mg and, optionally, one or both of Pb and Cd for the anode of a zinc-alkaline battery which employs zinc as an active material of the anode (2), aqueous alkaline solution as an electrolyte, and manganese dioxide, silver oxide, oxygen and so forth as an active material of the cathode (5). The use of such zinc alloy permits the reduction of the amount to be used of mercury employed for amalgation of the anode zinc surface with the object of corrosion inhibition, thereby enabling the provision of a low pollution zinc-alkaline battery.
    Type: Grant
    Filed: November 26, 1986
    Date of Patent: April 5, 1988
    Assignees: Matsushita Electric Industrial Co., Ltd., Mitsui Mining & Smelting Co., Ltd.
    Inventors: Akira Miura, Ryoji Okazaki, Kanji Takata, Tsukasa Ohira
  • Flame-retardant styrene-base resin composition
    Patent number: 4735983
    Abstract: A flame-retardant styrene-base resin composition is composed of 100 parts by weight of a styrene-base resin, 2.0-20.0 parts by weight of a halogenous flame retardant and 0.1-5.0 parts by weight of an antimony compound. The weight ratio of halogen atoms/antimony atoms in the resin composition is 5 or greater. The resin composition of this invention has well-balanced specific gravity, impact resistance and heat resistance and flame retardancy.
    Type: Grant
    Filed: March 25, 1987
    Date of Patent: April 5, 1988
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Masato Takaku, Ichiro Otsuka, Keizi Iio, Nobuyuki Tashiro, Daizo Natsugari, Hideo Ichikawa
  • Preparation process of heat-resistant polymers from polycarboxcylic acids and anhydrides in the presence of an alkali metal fluoride
    Patent number: 4736008
    Abstract: Disclosed herein is a process for preparing heat-resistant polymers by reacting an organic polyisocyanate with one or more compounds selected from the group consisting of organic polycarboxylic acids and organic polycarboxylic acid anhydrides in the presence of an alkali metal fluoride or an alkali metal fluoride combined with a quaternary onium salt as a catalyst.
    Type: Grant
    Filed: December 19, 1986
    Date of Patent: April 5, 1988
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Masahiro Kouno, Akihiro Yamaguchi, Masanori Osawa, Kohei Shizuka, Hiromi Nakano, Kazumi Mizutani
  • Polypropylene-base resin composition containing an inorganic filler and 0.01 to 0.6 wt. % of carbon black
    Patent number: 4734450
    Abstract: A polypropylene-base resin composition comprising a polypropylene-base resin and carbon black in an amount of 0.01-0.6 wt. % based on the polypropylene-base resin and being suitable for use in the production of molded articles having excellent paintability.
    Type: Grant
    Filed: March 19, 1986
    Date of Patent: March 29, 1988
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Yoichi Kawai, Masami Maki, Masaru Abe, Sachio Yokote, Katsumi Sekiguchi
  • Dichroic azo dyestuffs and liquid crystal composition containing said dyestuffs
    Patent number: 4734218
    Abstract: Provided are novel dichroic azo dyestuffs, which contain skeletons represented by the following general formula: ##STR1## at one terminals of the long axes of the molecules of the azo dyestuffs, and liquid crystal compositions containing the dichroic azo dyestuffs in forms dissolved in liquid crystals. These dichroic azo dyestuffs have large dichroic ratios and high durability, and their compositions are employed as useful display devices.
    Type: Grant
    Filed: July 18, 1986
    Date of Patent: March 29, 1988
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Keisuke Takuma, Kimitoshi Kato, Hiroshi Aiga, Yasuyuki Yamada, Tsutomu Nishizawa
  • Quinazoline compounds and antihypertensives
    Patent number: 4734418
    Abstract: Disclosed herein is an antihypertensive preparation containing, as an active component, a novel quinazoline derivative represented by the following general formula or a salt thereof: ##STR1## wherein R.sup.100 means a hydrogen atom or methoxy group, R.sup.200 and R.sup.300 denote individually a hydrogen atom or lower alkoxy group, R.sup.400 is a hydrogen atom or amino group, l stands for 2 or 3, and Het is a specific hetero ring group.
    Type: Grant
    Filed: December 6, 1985
    Date of Patent: March 29, 1988
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Keiichi Yokoyama, Koji Kato, Takumi Kitahara, Hiroyasu Ohno, Takashi Nishina, Mikio Kumakura, Akira Awaya, Takuo Nakano, Kazuyuki Watanabe, Sakae Saruta
  • Polyimide from ether diamine having the indane structure and high-temperature adhesive of polyimide
    Patent number: 4734482
    Abstract: This invention relates to a novel polyimide and describes the method of its preparation, adhesives of the polyimide and the method for their application.The polyimide has recurring units of the formula ##STR1## (where Y is ##STR2## and R is a tetra-valent radical selected from the group consisting of aliphatic radicals having not less than two carbons, cyclo-aliphatic radical, monoaromatic radical, condensed polyaromatic radical, and non condensed polyaromatic radical wherein aromatic radicals are mutually connected with a bond or a crosslinking function).
    Type: Grant
    Filed: December 23, 1986
    Date of Patent: March 29, 1988
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Shoji Tamai, Saburo Kawashima, Yoshiho Sonobe, Masahiro Ohta, Hideaki Oikawa, Akihiro Yamaguchi
  • Method for separating glycine and L-serine from a solution containing same
    Patent number: 4733009
    Abstract: Disclosed is a method for separating lycine and L-serine from a solution containing both of them in the dissolved state and, in particular, a reaction solution obtained from a fermentation or enzymic conversion process for the preparation of L-serine by using glycine as the raw material. This method is based on a chromatographic technique utilizing the differential affinity of L-serine and glycine for a strongly acidic ion exchange resin.
    Type: Grant
    Filed: July 16, 1986
    Date of Patent: March 22, 1988
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Shoichiro Miyahara, Toshio Matsumoto, Tooru Miyahara, Akio Sakaguchi, Kazunari Nitta
  • Method of separating monohydrate of L-cysteine hydrochloride
    Patent number: 4733010
    Abstract: Hydrochloric acid is added to a solution containing L-cysteine, L-cystine, L-serine and an inorganic salt until it contains at least 15% by weight of hydrochloric acid. The solution is held at a temperature of at least 20.degree. C. so that the L-cystine and the inorganic salt may form a solid, and the solid is removed from the solution. The solution is cooled to a temperature not exceeding 10.degree. C., so that crystallization may take place to form the monohydrate of L-cysteine hydrochloride. The monohydrate is separated from the L-serine in the solution.
    Type: Grant
    Filed: June 9, 1987
    Date of Patent: March 22, 1988
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Shyoichiro Miyahara, Toshiaki Kamiguchi, Tadashi Hashimukai, Kazunari Nitta
  • Preparation process of indole
    Patent number: 4732654
    Abstract: In an industrial process for preparing indole by reacting aniline and ethylene glycol, high boiling-point impurities and non-volatile substances are removed in advance from the reaction mixture either before the recovery of aniline from the reaction mixture or before the subsequent rectification of the resultant indole. Indole of a high purity can thus be obtained.
    Type: Grant
    Filed: July 15, 1987
    Date of Patent: March 22, 1988
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Atsuyoshi Yamauchi, Seiya Iguchi, Yuzo Ono, Hiroshi Kimura, Satoshi Morita
  • Process for producing 1, 3-dialkyl-2-imidazolidinone
    Patent number: 4731453
    Abstract: An improved process of producing 1, 3-dialkyl-2-imidazolidinones directly from N, N'-dialkylethylenediamine and urea with a high yield is provided, which process comprises reacting a N, N'-dialkylethylenediamine of the formula ##STR1## wherein R represents --CH.sub.3, --C.sub.2 H.sub.5, --C.sub.3 H.sub.7 or --C.sub.4 H.sub.9, with urea at 180.degree. C. or higher in the presence of a polar solvent, to obtain a 1, 3-dialkyl-2-imidazolidinone of the formula ##STR2## and preferably comprises carrying out the reaction at two stages, that is, the initial period reaction being carried out at 140.degree. C. or lower to from a 1, 1'-dialkyl-1 1'-dimethylenebisurea and successively the latter reaction being carried out at 180.degree. C. or higher.
    Type: Grant
    Filed: March 31, 1986
    Date of Patent: March 15, 1988
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Teruyuki Nagata, Nobuyuki Kajimoto, Masaru Wada, Hideki Mizuta, Akihiro Tamaki
  • Thermoplastic resin composition
    Patent number: 4731400
    Abstract: A thermoplastic resin composition having excellent transparency and a high ultraviolet transmittance and free from a reddish color is obtained from a polymer or copolymer of 4-methyl-1-pentene and a blue pigment. Preferably, the composition further comprises a black pigment and/or a red pigment.
    Type: Grant
    Filed: December 16, 1985
    Date of Patent: March 15, 1988
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventor: Hiromi Shigemoto
  • Process for producing sialon
    Patent number: 4731236
    Abstract: A process for producing a sialon powder, which process comprises the steps of:introducing a decomposable silicon compound, decomposable aluminum compound and a decomposable carbon compound into a steam-containing hot gas to decompose said decomposable silicon compound, aluminum compound and carbon compound in said hot gas into silicon oxide, aluminum oxide and elemental carbon, respectively, thereby producing a fine solid particle mixture consisting essentially of said silicon oxide, aluminum oxide and elemental carbon to be dispersed in said gas;collecting said fine solid particle mixture dispersed in the gas from the gas phase by a solid-gas separating technique; andcalcining the thus-obtained carbon-containing composition consisting essentially of said silicon oxide, aluminum oxide and elemental carbon, in a nitrogen containing gas atmosphere.
    Type: Grant
    Filed: April 15, 1986
    Date of Patent: March 15, 1988
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Norihiro Murakawa, Kazuyoshi Isogaya, Kensaku Maruyama, Fumio Nakamura
  • Aromatic copolyester derived from aromatic dicarboxylic acid component and aromatic diol component
    Patent number: 4731433
    Abstract: An aromatic copolyester comprising substantially equimolar proportions of [A] units derived from an aromatic dicarboxylic acid having 8 to 16 carbon atoms, and [B] units derived from an aromatic diol component; characterized in that(I) the diol component [B] is composed of 20 to 95 mole %, based on the total moles of compounds (a) and (b) below, of(a) a bisphenol compound represented by the formula ##STR1## wherein X represents a direct bond, or a divalent group selected from the class consisting of C.sub.1 -C.sub.8 alkylidene groups, O, S, SO, SO.sub.2 and CO, and(b) 5 to 80 mole %, based on the total moles of the compounds (a) and (b), of a compound selected from the group consisting of a specific divalent phenolic compound, and(II) the aromatic copolyester has an intrinsic viscosity [.eta.], determined at 60.degree. C. in pentafluorophenol, of at least 0.4 dl/g.
    Type: Grant
    Filed: August 2, 1985
    Date of Patent: March 15, 1988
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Tadao Yatsu, Takayuki Nakano, Toshiki Sotoyama
  • Separation method of polymer powder and carrier gas
    Patent number: 4729772
    Abstract: Polymer powder is separated from a carrier gas by separating the polymer powder from the carrier gas in a cyclone separator, drawing the thus-separated polymer powder through a bottom part of the separator into a hopper, feeding out the polymer powder by a rotary feeder from the hopper while controlling the revolution speed of the rotary feeder in accordance with the powder level in the hopper, and controlling the volume of a purge gas, which is introduced into a polymer powder guide extending between the separator and the hopper for the prevention of plugging thereof, in accordance with the revolution speed of the rotary feeder. The height of the top of the powder in the hopper is maintained at a predetermined constant level.
    Type: Grant
    Filed: December 2, 1986
    Date of Patent: March 8, 1988
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Tadashi Asanuma, Yoshiyuki Funakoshi, Kaneo Ito, Akihiko Nakajima
  • Temperature control indicator unit
    Patent number: 4729671
    Abstract: This invention relates to a temperature control indicator unit comprising a substrate having supported thereon (a) microcapsules enclosing a hydrophobic organic compound possessing an arbitrarily selected melting point, (b) a methine dye and (c) an oxidizing material. More particularly, a unit made by combining an irreversibly color-developing methine dye and an oxidizing material with microcapsules enclosing a hydrophobic organic compound possessing a predetermined melting point and supporting them on a substrate is used for temperature control purposes. A suitable measure is taken, preferably at or below the desired control temperature, to break at least a part of the microcapsules of the unit and thereby produce fissures or the like in the microcapsule membrane. Then, the unit is stored or transported together with an article to be placed under temperature control.
    Type: Grant
    Filed: December 31, 1986
    Date of Patent: March 8, 1988
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Makoto Asano, Iwao Chiba, Masumi Iemura
  • Method for adsorbing and desorbing
    Patent number: 4729834
    Abstract: Disclosed herein is a high molecular composite material, which comprises as one component thereof a water insolubilized homopolymer of at least one monomer selected from specific N-alkyl- or N-alkylene-substituted (meth)acrylamides, a second copolymer of said at least one monomer with one or more monomers other than the (meth)acrylamides and copolymerizable therewith, or a water-insolubilized product of the homopolymer or either first or second copolymer. The water-insoluble product can form, with a low or high molecular compound containing one or more active hydrogen or hydrophobic groups, a composite material which may be applied widely for absorbing and desorbing a variety of valuable synthetic compounds and natural matter.
    Type: Grant
    Filed: June 26, 1986
    Date of Patent: March 8, 1988
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Hiroshi Itoh, Toshimi Nakagawa, Atsuhiko Nitta, Tomio Tanaka, Hideo Kamio, Katsutoshi Nagai