Patents Assigned to Mitsui
  • Patent number: 5780378
    Abstract: A solid titanium catalyst component comprising (a) magnesium, (b) titanium, (c) a halogen, (d) a polyether, (e) a hydrocarbon and (f) an electron donor other than the polyether (d) as essential components is provided. Also a process for preparing a solid titanium catalyst component for olefin polymerization, comprising the steps of contacting a halogenated magnesium compound with a compound selected from the group consisting of an alcohol, an ether and an ester in a hydrocarbon solvent to obtain a magnesium compound solution, contacting the magnesium compound solution with a polyether and contacting the resultant solution with a liquid titanium compound is provided. Further, a catalyst for olefin polymerization comprising the above-mentioned solid titanium catalyst component, an organoaluminum compound catalyst component and an electron donor, and a process for polymerizing an olefin using the catalyst for olefin polymerization are also disclosed.
    Type: Grant
    Filed: September 6, 1995
    Date of Patent: July 14, 1998
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Tetsuya Toida, Tetsunori Shinozaki, Mamoru Kioka
  • Patent number: 5776365
    Abstract: There is provided a carboxylic acid compound represented by the following formulae (I) to (IV): ##STR1## a liquid crystal material consisting of the carboxylic acid ester compound, a liquid crystal composition comprising the carboxylic acid ester compound, and a liquid crystal element using the carboxylic acid ester compound. There can be obtained advantages such as low operating temperature, high speed switching, very small electric power consumption, and high-stable contrast.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: July 7, 1998
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Yuuichirou Tatsuki, Shinichi Nishiyama, Junichi Kawabata, Tooru Yamanaka, Chiho Tanaka
  • Patent number: 5777175
    Abstract: Propylene oxide is added to an active hydrogen compound in the presence of an alkali metal hydroxide catalyst in an amount of from 0.05 to 0.5 mole per mole of the active hydrogen compound at a reaction temperature of from 60.degree. to 98.degree. C. at a reaction pressure less than or equal to 4 kg/cm.sup.2 to prepare a polyoxyalkylene polyol which has a hydroxyl value of from 10 to 35 mg KOH/g, a monool content less than or equal to 15 mol %, a Head-to-Tail bond selectivity greater than or equal to 96 percent, and low viscosity. A polymer polyol is prepared by polymerizing an ethylenically unsaturated monomer in the polyoxyalkylene polyol. A flexible polyurethane foam is prepared by reacting the polyoxyalkylene polyol or the polymer polyol with an organic polyisocyanate compound in the presence of a foaming agent, a catalyst, a surfactant, a crosslinking agent and other additives.
    Type: Grant
    Filed: April 12, 1995
    Date of Patent: July 7, 1998
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Kazuhiko Ohkubo, Tomoki Tsutsui, Yoshitsugu Sakaki, Tamotsu Kunihiro, Ariko Nishikawa, Tsukuru Izukawa, Kaoru Ueno, Seijiro Sakai, Yukichi Tanaka
  • Patent number: 5772924
    Abstract: Composite conductive powder comprises a calcined mixture of conductive powder mainly comprising indium oxide which contains at least one member selected from the group consisting of tin oxide, titanium oxide and zirconium oxide as a dopant and conductive powder mainly comprising tin oxide which contains at least one member selected from the group consisting of antimony oxide, tantalum oxide and niobium oxide as a dopant, and a conductive film is formed from the composite, conductive powder. The composite, conductive powder and the conductive film produced from the powder permit the reduction in the amounts of materials for the ITO film, in particular, indium which is an expensive material and the composite, conductive powder can simultaneously satisfy both requirements for high transparency and high conductivity even if it is used for the formation of films through the coating technique.
    Type: Grant
    Filed: February 27, 1997
    Date of Patent: June 30, 1998
    Assignee: Mitsui Mining & Smelting Co., Ltd.
    Inventors: Takao Hayashi, Katsuhiko Yoshimaru
  • Patent number: 5773172
    Abstract: Dyestuffs represented by the below-described formula (1), that is, dyestuffs formed of a chromophoric nucleus and a bisphenol introduced therein have excellent solubility in solvents and binder resins, and can provide color filters having excellent transmittance characteristics and durability. ##STR1## wherein Dye represents a chromophoric nucleus, X represents a direct bond or a divalent connecting group, R.sup.1 to R.sup.10 and n are defined with the provision that one of R.sup.9 and R.sup.10 has 3 or more carbon atoms.
    Type: Grant
    Filed: June 6, 1996
    Date of Patent: June 30, 1998
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Akio Karasawa, Hisato Itoh
  • Patent number: 5770655
    Abstract: A polymer composition comprising ?A! a polymer selected from a copolymer of .alpha.-olefin having at least 2 carbon atoms and a specific cyclic olefin, a ring-opening polymer of said specific cyclic olefin and a hydroganted, ring-opening polymer thereof and ?B! a core-shell elastomer containing 40 to 85 parts of weight of a core component which comprises a styrene-butadiene copolymer and 15 to 60 parts by weight of a shell component which comprises a copolymer of an acrylate or methacrylate having a specific cyclic structure, a monovinyl aromatic monomer, other monovinyl monomer and a plyfunctional monomer. This polymer composition is excellent in transparency and impact resistance.
    Type: Grant
    Filed: August 14, 1996
    Date of Patent: June 23, 1998
    Assignees: Mitsui Petrochemical Industries, Ltd., Hoechst Aktiengesellschaft
    Inventors: Toshihiro Sagane, Masayuki Okabe, Masahiro Kishine
  • Patent number: 5770108
    Abstract: A novel pyrimidine compound represented by the following Formulas (1) and (2), a liquid crystal composition containing said compound and a liquid crystal element having excellent characteristics such as high speed response, orientation and high contrast ratio. ##STR1## wherein R.sub.1 and R.sub.2 each represent a linear or branched alkyl or alkenyl group, an alkoxyl or alkenyloxy group; R.sub.3 and R.sub.4 each represent a linear or branched alkyl group or alkenyl group; A.sub.1 and A.sub.2 each represent a substituted or unsubstituted 1,4-phenylene group, a pyridine-2,5-diyl or trans-1,4-cyclohexylene group; X.sub.1 and X.sub.2 each represent a single bond, --COO--, --OCO--, --OCH.sub.2 or --CH.sub.2 O-- group; Y.sub.1 and Y.sub.2 each represent --COO-- or --OCO-- group; and a, b, p, q, m and n each represent 0 or 1, provided that a+b+p+q is not 0.
    Type: Grant
    Filed: June 21, 1996
    Date of Patent: June 23, 1998
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Yoshiyuki Totani, Motokazu Hirao, Atsuo Otsuji, Tsutomu Ishida, Hiroe Kayashima, Masakatsu Nakatsuka
  • Patent number: 5770683
    Abstract: A preparation process of polyhydroxycarboxylic acid comprising conducting dehydration polycondensation of hydroxycarboxylic acid or an oligomer of the same in a reaction mixture containing said hydroxycarboxylic acid or the oligomer of the same and an organic solvent substantially in the absence of water to give polyhydroxycarboxylic acid having an weight average molecular weight of 50,000 or more, successively mixing the reaction mixture containing said polyhydroxycarboxylic acid with at least one binder selected from the group consisting of (1) polyisocyanate compound, (2) polybasic acid anhydride, (3) cyclic imino ester, (4) cyclic imino ether, (5) aromatic hydroxycarboxylic acid, (6) polyamino compound, (7) polyhydric alcohol, (8) epoxy compound, (9) polyfunctional aziridine compound, (10) lactam, (11) lactone, and (12) diethylene glycol bischloroforate, and reacting to obtain polyhydroxycarboxylic acid having a weight average molecular weight of 100,000 or more the polyhydroxycarboxylic acid which is obt
    Type: Grant
    Filed: October 20, 1995
    Date of Patent: June 23, 1998
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Yasunori Yoshida, Michihiko Miyamoto, Shoji Obuchi, Kan Ideda, Masahiro Ohta
  • Patent number: 5766279
    Abstract: A fine particulate polishing agent is based on cerium oxide and silicon oxide; a slurry polishing agent comprises the foregoing fine particulate polishing agent which can be prepared by a method which comprises the steps of mixing, with stirring, cerium oxide fine particles, silica sol and a liquid; drying the mixture; mixing the material with a liquid; and then subjecting the mixture to deagglomeration using a wet pulverizing mill to give a slurry. Preferably, the dried particulate material is subjected to a thermal treatment at a high temperature of 150.degree. to 1200.degree. C., preferably 800.degree. to 900.degree. C., thereby to produce a solid solution of cerium oxide and silicon oxide. The slurry polishing agent can ensure the achievement of surface roughness comparable to or superior to that achieved by the colloidal silica polishing agents and a high polishing rate at least comparable to that achieved by the conventional cerium oxide polishing agents.
    Type: Grant
    Filed: September 25, 1996
    Date of Patent: June 16, 1998
    Assignee: Mitsui Mining and Smelting Co., Ltd.
    Inventors: Naruo Ueda, Norikazu Yamamoto, Kenzo Hanawa, Kazuhiko Kato
  • Patent number: 5766748
    Abstract: The stretched film of the lactic acid-based polymer of the invention can degrade under natural environment, and additionally has an excellent mechanical strength and durability. By use of a lubricant in combination with an inorganic filler, these properties are further improved and thickness accuracy is enhanced. Consequently, the stretched film of the lactic acid-based polymer of the invention can be widely applied to a prepaid card and other various film materials, lamination materials and packaging materials. Even though abandoned after use in the natural environment, the stretched film relatively quickly decomposes into carbon dioxide and water and does not accumulate as waste.
    Type: Grant
    Filed: November 20, 1996
    Date of Patent: June 16, 1998
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Shuhei Ikado, Takayuki Kuroki, Masumi Saruwatari, Naoki Kobayashi, Kazuhiko Suzuki, Hirotaka Wanibe
  • Patent number: 5767033
    Abstract: The novel transition metal compound of the invention is represented by the following formula: ##STR1## wherein R.sup.1 and R.sup.2 are each a hydrogen atom or a hydrocarbon group of 1 to 3 carbon atoms;X.sup.1 and X.sup.2 are each a halogen atom; andY is a divalent silicon-containing group selected from the group consisting of dimethylsilylene, diphenylsilylene and methylphenylsilylene. The transition metal compound is useful for an olefin polymerization catalyst with which a propylene (co)polymer having specific structure is prepared.
    Type: Grant
    Filed: November 18, 1996
    Date of Patent: June 16, 1998
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Junichi Imuta, Junji Saito, Takashi Ueda, Yoshihisa Kiso, Akira Mizuno, Masaaki Kawasaki
  • Patent number: 5766595
    Abstract: Method of improving the quality of an egg from a female adult fowl comprising adding an effective egg improving amount of at least one tea polyphenol to a feed composition for the fowl and administering the composition to the fowl. Eggs produced by such method have a reduced crude fat content, a reduced peroxide content, an enhanced Haugh Unit value, an enhanced degree of transparency of egg white, an enhanced foam-forming ability and a pure white color in foam and egg white when the eggs are cooked. Also provided is an improved feed composition for improving the quality of an egg from a female adult fowl, wherein the improvement comprises the feed composition containing an effective egg improving amount of at least one tea polyphenol.
    Type: Grant
    Filed: January 30, 1996
    Date of Patent: June 16, 1998
    Assignees: Nippon Formula Feed Mfg. Co., Ltd., Mitsui Norin Co., Ltd.
    Inventors: Tetsuo Yamane, Takao Tsuchida, Hisaya Gotou, Daizou Takahashi, Hidetsugu Takeda
  • Patent number: 5767331
    Abstract: A copolymer of ethylene and an alpha-olefin having an ethylene content of from 30 to 90 mole %, a number average molecular weight of from 300 to 30,000 and a molecular weight distribution defined by a Q value (the ratio of the weight average molecular weight to the number average molecular weight) of not more than 3 and a Z value (the ratio of the maximum value of the molecular weight to the minimum value of the molecular weight when the molecular weight is measured by gel permeation chromatography) of from 15 to 200. The said copolymer can be produced by a process comprising copolymerizing ethylene with an alpha-olefin in the liquid phase in the presence of a polymerization catalyst composed of a combination of a soluble vanadium compound and an organoaluminum compound in the co-presence of hydrogen, characterized in that(a) the copolymerization is carried out in a continuous manner,(b) the concentration of the vanadium compound in the polymerization system is maintained at 0.
    Type: Grant
    Filed: May 24, 1995
    Date of Patent: June 16, 1998
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Hidekuni Oda, Tatuo Kinoshita, Akiyoshi Shimizu
  • Patent number: 5763687
    Abstract: An improved preparation process for an aromatic mononitro compound comprising reacting an aromatic compound with mixed acid consisting of nitric acid, sulfuric acid or phosphoric acid and water, wherein these flow to react with each other in a reactor comprising a tube inside of which more than one twisted tabular members are aligned in sequence in a manner that a front margin of a twisted tabular member is substantially perpendicular to an back margin of the preceding member, can resolve a number of problems such as an inadequate mixing efficiency, reduction of a reaction rate, associated voluminal increase/complication of a reactor and difficulty in securing safety as well as provide the aromatic mononitro compound with minimal amount of by-products in a considerably short period.
    Type: Grant
    Filed: December 10, 1996
    Date of Patent: June 9, 1998
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Jyoji Morisaki, Masaaki Iijima, Kouki Oogaki, Hiroaki Matsuno, Takashi Yamaguchi, Katsuharu Miyata
  • Patent number: 5763693
    Abstract: In a process for producing isopropyl alcohol by direct liquid phase hydration of propylene and water in the presence of a strong acid solid catalyst at a high temperature and a high pressure, the reaction is carried out at a temperature in a ranging between 100.degree. and 250.degree. C. and a pressure in a ranging between 60 and 200 atm in an excess of water. Then, a liquid phase of the reaction product is contacted with an extraction agent of a saturated hydrocarbon having 3 or 4 carbon atoms at a temperature in a ranging between the critical temperature of the extraction agent and the temperature higher than the critical temperature by 40.degree. C. under a pressure ranging between the critical pressure of the extraction agent and 200 atm at an S/F ratio ranging between 0.3 and 3 which is calculated from the equation of the amount of the extraction agent divided by the amount of the extract feed.
    Type: Grant
    Filed: February 21, 1996
    Date of Patent: June 9, 1998
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Shigeru Hirata, Shinji Ogawa
  • Patent number: 5763098
    Abstract: Formed products such as foams, fabrics for industrial materials, filaments, nonwoven fabrics, composite materials and films which are degradable after use with ease in the natural environment are prepared by using a high molecular weight aliphatic polyester obtained by direct polycondensation of an aliphatic polyhydric alcohol with aliphatic polybasic acid or additionally hydroxycarboxylic acid or oligomers of these materials in a reaction mixture containing a solvent.
    Type: Grant
    Filed: July 14, 1997
    Date of Patent: June 9, 1998
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Taiji Kameoka, Takeshi Kashima, Masanobu Ajioka, Akihiro Yamaguchi, Kazuhiko Suzuki
  • Patent number: 5763517
    Abstract: The thermoplastic resin composition of the present invention comprises (A) polyamide having a melting point of not lower than 280.degree. C., particularly preferably (A-1) specific polyamide having a melting point of higher than 300.degree. C., (B) a specific modified polymer, (C) a hindered phenol type antioxidant having a molecular weight of not less than 500 and a TGA 10% weight loss temperature of not lower than 300.degree. C., and (D) a sulfur type antioxidant having a molecular weight of not less than 600 and a TGA 10% weight loss temperature of not lower than 280.degree. C. The molded product of the present invention is made of the above-mentioned thermoplastic resin composition. The thermoplastic resin composition of the invention is excellent in heat stability.
    Type: Grant
    Filed: September 26, 1996
    Date of Patent: June 9, 1998
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Sanehiro Yamamoto, Kazuto Sugiyama, Akinori Toyota, Yoshikatsu Amimoto, Fumitoshi Ikejiri
  • Patent number: 5763649
    Abstract: A process for producing aromatic carboxylic acids by subjecting an aromatic compound having one or more substituent alkyl groups and/or partially oxidized substituent alkyl groups to a liquid phase oxidation with a molecular oxygen-containing gas in a reaction solvent containing a lower aliphatic carboxylic acid in the presence of a catalyst composed of a heavy metal compound and a bromine compound, under a condition of a weight proportion of said reaction solvent to said aromatic compound within the range from 6.5 to 70 parts by weight per one part by weight of said aromatic compound, a reaction time within the range from 45 to 4.5 minutes and a product of the numerical value of said weight proportion of the reaction solvent to the aromatic compound multiplied by the numerical value of said reaction time expressed in munute within the range from 270 to 330.
    Type: Grant
    Filed: July 8, 1997
    Date of Patent: June 9, 1998
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventor: Hiroshi Fukuhara
  • Patent number: 5762383
    Abstract: A child proof apparatus for a vehicle door latch device comprises a child lever adapted to be manually turned, an intermediate lever having an abutting end engageable with an open lever and an elongated slot, and a child link having a child pin slidably engaged in the elongated slot. The pin is integrally formed in the child link and has a first engaging means which is engaged in the slot by being turned by a right angle after the pin is inserted into the slot. The child link has a snap fastener portion integrally formed therewith which is rotatably engaged in a second hole of the child lever. The child lever has a shaft integrally formed therewith having a second engaging means which is engaged in the slot by being turned by a right angle after the shaft is inserted into the slot.
    Type: Grant
    Filed: October 9, 1996
    Date of Patent: June 9, 1998
    Assignee: Mitsui Kinzoku Kogyo Kabushiki Kaisha
    Inventor: Yoshihito Gomi
  • Patent number: 5763513
    Abstract: A lactic acid polymer composition comprising formulating 100 parts by weight of a mixture consisting of 80-95% by weight of an L-lactic acid polymer having an L-lactic acid proportion of 75% or more and 5-20% by weight of a plasticizer selected from the group consisting of a polyhydric alcohol ester and a hydroxypolycarboxylic acid ester, 0.1-5 parts by weight of an anti-bloking agent having a SiO.sub.2 content of 90% or more and an average particle size of 7-50 nm, and 0.1-2 parts by weight of a slip agent; a molded product and film obtained from the composition; and a preparation process of the same are disclosed. The molded product and film are excellent in processability, transparency, flexibility, anti-blocking property and slip, and can be degraded into harmless water and carbon dioxide under natural environment, when abandoned.
    Type: Grant
    Filed: May 4, 1995
    Date of Patent: June 9, 1998
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Kazuhiko Suzuki, Takayuki Watanabe, Yasuhiro Kitahara, Masanobu Ajioka, Shuhei Ikado