Patents Assigned to Mitsui
  • Patent number: 4439237
    Abstract: A metallurgically bonded diamond-metal composite sintered material suitable for lapping comprises a Ni and/or Co base, an intermetallic compound dispersed in said base and diamond powder, and the method of making said material comprises specifying the particle size of the base powder and then sintering same at a low temperature not exceeding a diamond graphitization temperature.
    Type: Grant
    Filed: September 25, 1981
    Date of Patent: March 27, 1984
    Assignee: Mitsui Mining & Smelting Co., Ltd.
    Inventors: Shiro Kuminitsu, Izumi Hayakawa, Seizo Kitatani, Akira Emura
  • Patent number: 4438243
    Abstract: A process for producing a random terpolymer of ethylene and alpha-olefins having at least 3 carbon atoms in the presence of a catalyst composed of (1) a titanium catalyst component containing at least magnesium and titanium and (2) an organoaluminum catalyst component in a hydrocarbon solvent at a temperature above the melting point of the terpolymer formed, under such conditions that the resulting copolymer dissolves in the hydrocarbon solvent; characterized in that said terpolymer consists essentially of(A) more than 90 mole % to 99.5 mole % of ethylene,(B) 0.2 mole % to 9.8 mole % of an alpha-olefin with 3 to 4 carbon atoms, and(C) 0.2 mole % to 9.8 mole % of an alpha-olefin with 5 to 18 carbon atoms,the total of the proportions of the monomers (A), (B) and (C) being 100 mole %.
    Type: Grant
    Filed: May 14, 1981
    Date of Patent: March 20, 1984
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Norio Kashiwa, Yoshinori Morita, Michiharu Suga
  • Patent number: 4436917
    Abstract: A process for the preparation of indole and derivatives thereof which comprises reacting an aniline with a 1,2-glycol in the vapor phase, the liquid phase or a mixed vapor-liquid phase. Various solid acids, metals and activated carbon can be used as catalysts for this reaction. The present invention makes it possible to prepare indole and derivatives thereof in a single step by using inexpensive compounds as the starting materials.
    Type: Grant
    Filed: April 15, 1981
    Date of Patent: March 13, 1984
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Fujio Matsuda, Takazo Kato
  • Patent number: 4436916
    Abstract: A process for the preparation of indole and derivatives thereof wherein an aniline is reacted with a 1,2-glycol in the vapor phase, the liquid phase or a mixed vapor-liquid phase. A sulfide or selenide or cadmium and/or zinc are used as the catalyst for this reaction. The present invention makes it possible to prepare indole and derivatives thereof in a single step by using inexpensive compounds as the starting materials.
    Type: Grant
    Filed: May 18, 1981
    Date of Patent: March 13, 1984
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Fujio Matsuda, Takazo Kato, Tadatoshi Honda, Kazuhiro Terada, Yasuo Kogure
  • Patent number: 4435543
    Abstract: Phenolic resin compositions comprising a polymeric substance having a phenolic OH group such as phenol resins, and a rubber having an epoxy group and an epoxy equivalent of 500 to 30,000 such as butadiene copolymers, acrylic copolymers, chloroprene copolymers and urethane copolymers are provided. These resin compositions exhibit improved properties having overcome the drawback of brittle properties intrinsic of conventional phenolic resins, and also exhibit cold resistance; hence they are used as molding materials, laminating materials, casting materials, binders, etc. Further, molding resin compositions having improved solvent-resistance and metal insert properties are provided.
    Type: Grant
    Filed: April 12, 1982
    Date of Patent: March 6, 1984
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Kenji Ema, Junji Hara, Shuhei Ikado, Hideo Kawashima, Tomohide Yokoo
  • Patent number: 4434305
    Abstract: High quality hydroquinone is produced from p-diisopropylbenzene dihydroperoxide at a high yield according to the disclosed process. The p-diisopropylbenzene dihydroperoxide is decomposed in the presence of an acid catalyst and the concentration of the hydroperoxide is maintained in the range of 0.1 to 1% by weight; the remaining hydroperoxide in the decomposition step is further subjected to an acid decomposition prior to the recovery of the formed hydroquinone product.
    Type: Grant
    Filed: December 1, 1981
    Date of Patent: February 28, 1984
    Assignee: Mitsui Petrochemicals Industry, Ltd.
    Inventors: Nobuo Kurosaka, Makoto Yasuda, Tadateru Murakami
  • Patent number: 4433121
    Abstract: In a process for polymerizing a monomer capable of being formed, upon polymerization, into a solution having an upper cloud point of the corresponding polymer in a reaction medium being liquid under the reaction conditions, the polymerization being carried out under such conditions that the resulting polymer dissolves in the reaction medium; the improvement wherein(i) the polymerization is carried out in a polymerization zone at a temperature above the upper cloud point of said polymer solution and under conditions which enable the polymer solution to be separated into two phases,(ii) the polymerization is carried out under stirring conditions which maintain the two phases under said phase-separating conditions in a dispersed and mixed state, and(iii) the resulting polymer solution is sent to a separating zone located independently of said polymerization zone, thereby separating it into two phases in the separating zone at a temperature above the upper cloud point, and thereafter, the polymer-rich liquid phas
    Type: Grant
    Filed: July 6, 1982
    Date of Patent: February 21, 1984
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Yasunori Kabu, Masayoshi Yasunaka, Yoshinori Morita, Masanori Motowoka
  • Patent number: 4433133
    Abstract: Disclosed is a process for producing fine particles of crosslinked urea-formaldehyde polymer which comprises the steps of synthesizing a precondensate of urea and formaldehyde, allowing the precondensate to react by the addition of an aqueous solution of an acid catalyst, and then neutralizing the reaction mixture, characterized in that the filtrate obtained in the filtration step for separating the polymer particles is recycled to the reaction system at the step of synthesizing a precondensate of urea and formaldehyde and/or the step of allowing the precondensate to react by the addition of an aqueous solution of an acid catalyst and in that the precondensate is obtained by reaction 1 mole of urea with 1.4 to 1.9 moles of formaldehyde at a pH of 6 to 10 and a temperature of 10 to 95.degree. C.
    Type: Grant
    Filed: March 28, 1983
    Date of Patent: February 21, 1984
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Naoyuki Ifuku, Akio Kurokawa, Kenzo Seita, Kaoru Usami, Naoyuki Aikawa
  • Patent number: 4433105
    Abstract: A chlorinated rubber having a chlorine content of about 5 through about 50% by weight and a Mooney viscosity (ML.sub.1+4 at 100.degree. C.) of about 20 through about 150 is presented. This chlorinated rubber is derived from the chlorination of (i) a copolymer rubber of ethylene and 1-butene having a mol ratio of ethylene/1-butene of about 85/15 through about 95/5 or (ii) a copolymer rubber of ethylene 1-butene and 5-ethylidene-2-norbornene having a mol ratio of ethylene/1-butene of about 85/15 through about 95/5 and a content of the 5-ethylidene-2-norbornene of 20% by weight or less based on the weight of the copolymer. The incorporation of the chlorinated rubber into a polyvinyl chloride composition results in the remarkable improvement of the impact resistance and flexibility, both at a low temperature, of the polyvinyl chloride.
    Type: Grant
    Filed: August 4, 1981
    Date of Patent: February 21, 1984
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Akira Matsuda, Tetsuo Tojyo
  • Patent number: 4431345
    Abstract: A method of assembling or testing a large-load, marine working platform structure, comprising the steps of laying sand on the bottom surface of a dock, and placing on the layer of sand spud cans attached to the lower ends of support frames of the working platform structure so as to scatter a load applied to the dock bed.
    Type: Grant
    Filed: December 30, 1980
    Date of Patent: February 14, 1984
    Assignee: Mitsui Engineering & Shipbuilding Co., Ltd.
    Inventor: Takehisa Inoue
  • Patent number: 4429495
    Abstract: The invention provides a door for buildings, comprising the outside panel thereof being larger in area than the inside panel thereof, the four edge faces of the door being provided on their outside portions with acute-angled projecting portions, the outside portions of the inner faces of a door frame being inclined toward the outside, the clearances between the inner faces of the door frame and the inside portions of the edge faces of the door being at least 6 mm each; and a door for buildings provided with a lock having clearances of at least 6 mm each over and under a dead bolt or a latch bolt when said bolt is inserted into a bolt recess.
    Type: Grant
    Filed: August 6, 1981
    Date of Patent: February 7, 1984
    Assignee: Mitsui Metal Processing Co., Ltd.
    Inventor: Kiyomi Aoki
  • Patent number: 4430174
    Abstract: Refinement of impure aluminum is accomplished by a method which comprises placing the impure aluminum in a molten form as an anode on one side of a porous article impregnated with a fused-salt electrolytic bath, disposing a cathode on the other side of the porous article, and passing direct current between the cathode and the anode.
    Type: Grant
    Filed: November 30, 1982
    Date of Patent: February 7, 1984
    Assignees: Mitsui Aluminium Co., Ltd., Yoshishige Tsumura
    Inventor: Yoshishige Tsumura
  • Patent number: 4430225
    Abstract: A pressurized aeration tank is provided which comprises an inner barrel arranged on the tank axis and an axial-flow impeller of optimum characteristics mounted therein, the inner barrel and the outer barrel or body portion of the tank being particularly proportioned and arranged relative to each other to define in the tank a circuitous flow passage of minimal total resistance loss. With this tank structure, a highly improved plant efficiency of BOD removal is readily obtainable with the use of concentrated activated sludge and aerobic microorganisms, mainly of the Opercularia group, in a specified range of tank pressure.
    Type: Grant
    Filed: January 7, 1982
    Date of Patent: February 7, 1984
    Assignee: Kabushiki Kaisha Mitsui Miike Seisakusho, Tochigi Factory
    Inventors: Akira Takamatsu, Hiroshi Higuchi
  • Patent number: 4429079
    Abstract: This invention relates to a composition comprising a mixture of at least two ethylene-rich ethylene/alpha-olefin copolymers (A) and (B) below which has excellent transparency and impact strength and improved properties, particularly low-temperature heat sealability, heat seal strength and flexural resistance.(A) 95 to 40% by weight of a random copolymer of ethylene and an alpha-olefin having 5 to 10 carbon atoms which has a melt index of 0.1 to 20 g/10 min., a density of 0.910 to 0.940 g/cm.sup.3, a crystallinity by X-rays of 40 to 70%, a melting point of 115.degree. to 130.degree. C. and an ethylene content of 94 to 99.5 mole %; and(B) 5 to 60% by weight of a random copolymer of ethylene and an alpha-olefin having 3 to 10 carbon atoms which has a melt index of 0.1 to 50 g/10 min., a density of 0.870 to 0.900 g/cm.sup.3, a crystallinity by X-rays of 5 to 40%, a melting point of 40.degree. to 100.degree. C. and an ethylene content of 85 to 95 mole %.
    Type: Grant
    Filed: March 11, 1982
    Date of Patent: January 31, 1984
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Yuzo Shibata, Seikoh Naganuma
  • Patent number: 4427823
    Abstract: In an uncured filled coating composition comprising (a) a polyfuntional acrylic-type carboxylic acid ester monomer or its prepolymer, (b) a polymerization initiator capable of curing said monomer or prepolymer (a), and (c) an inorganic solid filler; the improvement wherein said composition consists essentially of(A) 100 parts by weight of said polyfunctional acrylic-acid carboxylic acid ester monomer or its prepolymer (a), said polyfunctional monomer or prepolymer (a) being composed of 0 to 75% by weight of a trifunctional or higher acrylic-type carboxylic acid ester monomer or its prepolymer having a molecular weight of about 200 to about 700 and 25 to 100% by weight of a difunctional acrylic-type carboxylic acid ester monomer or its prepolymer having a molecular weight of about 160 to about 400,(B) 0.
    Type: Grant
    Filed: October 27, 1981
    Date of Patent: January 24, 1984
    Assignee: Mitsui Petrochemical Industries Ltd.
    Inventors: Hajime Inagaki, Hiroshi Wakumoto
  • Patent number: 4425255
    Abstract: A method for regenerating a catalyst containing molybdenum as an active component comprising subjecting a catalyst, which has been deactivated through the use for a reaction, with or without a molybdenum source added thereto, to a heat treatment in a reducing gas atmosphere under specific temperature conditions and then subjecting same to a further heat treatment in a gaseous atmosphere containing molecular oxygen and at specific temperature conditions.
    Type: Grant
    Filed: May 13, 1982
    Date of Patent: January 10, 1984
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Yoshiaki Toyoda, Yoshihiro Ikeda, Nobumasa Arashiba
  • Patent number: 4425053
    Abstract: An oil fence arrangement for effectively preventing oil spills from spreading or diffusing over the surface of the sea. The arrangement is of a double wall construction and can fold into a small space.
    Type: Grant
    Filed: June 9, 1981
    Date of Patent: January 10, 1984
    Assignee: Mitsui Ocean Development & Engineering Co., Ltd.
    Inventors: Ikuo Muto, Masamitsu Tatsuguchi
  • Patent number: 4425262
    Abstract: An electroconductive polyolefin composition comprising (a) 100 parts by weight of a polyolefin resin, (b) 10 to 60 parts by weight of carbon black, (c) 0.1 to 6 parts by weight of sulfur and (d) 0.1 to 5 parts by weight of trithiolcyanuric acid, and optionally containing 5 to 60 parts by weight of atactic polypropylene.
    Type: Grant
    Filed: February 11, 1982
    Date of Patent: January 10, 1984
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Yoichi Kawai, Yoshiro Nakamura, Yoshihisa Gotoh, Masami Maki, Sachio Yokote, Katsumi Sekiguchi
  • Patent number: 4424017
    Abstract: A system for burning a liquefied gas comprises a burner gun for spraying the liquefied gas into a combustion space, a pump for feeding the gas under pressure, pipe means connecting the burner gun with the pump, and a flow regulating valve provided in the pipe means, wherein the portion of the pipe means downstream from the valve has its inner diameter so determined in relation with the flow rate of the gas that the state of the gas flow through said portion falls within fog flow zone or bubble flow zone on Baker's two-phase flow diagram.In the system of the invention, unstable combustion of the liquefied gas due to vapor lock in the pipe means can be prevented even when the gas supply pressure is below the vapor pressure of the gas. Besides, the calorific value obtained with the system is variable over a wider range than with a conventional system. Thus the system has a remarkable industrial value.
    Type: Grant
    Filed: February 13, 1981
    Date of Patent: January 3, 1984
    Assignees: Hitachi Shipbuilding & Engineering Company Limited, Mitsui Liquefied Gas Co., Ltd.
    Inventors: Noboru Okigami, Yoshitoshi Sekiguchi, Hiroshi Hayasaka, Toshitsugu Koyama, Takeo Fujioka, Takeshi Yoshimitsu
  • Patent number: 4424255
    Abstract: Disclosed is improvement of heat-stability of a backing sheet for cushioned floor during foaming step of gelled polyvinyl chloride resin. The backing sheet comprises a thermoplatic resin fibrous material, another fibrous material and an inorganic filler, to which a phenolic antioxidation agent or a phosphitic antioxidation agent is added.
    Type: Grant
    Filed: July 20, 1982
    Date of Patent: January 3, 1984
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Motofumi Nakamura, Koji Horimoto, Motoyasu Yusawa