Patents Assigned to Mitsui
  • Patent number: 4906329
    Abstract: In a flash-drying process which comprises flashing a solvent solution of a polymer or copolymer maintained at an elevated temperature and pressure into a flashing zone maintained at a lower pressure than the pressure of the solvent solution through a means for releasing said elevated pressure, thereby evaporating and separating the solvent from the solvent solution, the improvement wherein an inert stripping agent is fed into a flow of the solvent solution at any point between said pressure-releasing means and said flashing zone.
    Type: Grant
    Filed: June 16, 1987
    Date of Patent: March 6, 1990
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Kenichi Tominari, Yuzi Miura, Kunio Furutachi, Yoshihiro Tsukamoto
  • Patent number: 4906675
    Abstract: An active energy ray-curable composition substantially comprising at least one of (meth)acrylates and oligomers thereof represented by the following general formula (I) ##STR1## wherein R represents a hydrogen atom or a methyl group, X represents an alkylene group in which at least one hydrogen atom may be replaced by a hydroxyl group, m is 0 or an integer of 1 to 4, Y represents a hydrocarbon group having a cyclic hydrocarbon moiety therein, and n is 1 or 2. The composition is useful as an adhesive, particularly as one in the production of optical discs.
    Type: Grant
    Filed: February 10, 1987
    Date of Patent: March 6, 1990
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Hajime Inagaki, Kenji Yamane
  • Patent number: 4903852
    Abstract: A blow-molding method and its apparatus and a molded drum thereby are improved in that: a lower mold is divided into two pieces, i.e., a split-type mold having a ring-like configuration and a lower mold itself, so that the molding operation of a chime of the molded drum is facilitated.
    Type: Grant
    Filed: January 25, 1989
    Date of Patent: February 27, 1990
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventor: Kazuhiro Masumoto
  • Patent number: 4904628
    Abstract: Catalysts for the polymerization of alpha-olefins, which comprise the product of the reaction between:(a) a metallorganic compound of Al;(b) an electron-donor compound reactive towards MgCl.sub.2 but which is not completely complexed with AlEt.sub.3, at the equivalent point of a potentiometric titration under standard conditions;(c) a solid comprising a halogenated Ti compound and an electron-donor belonging to particular classes of compounds and being extractable with AlEt.sub.3 for at least 70% by mols from the solid, the surface area of which after extraction is higher than 20 m.sup.2 /g.The present invention refers to new supported components of catalysts for the polymerization of olefins CH.sub.2 .dbd.CHR, in which R is an alkyl with 1-4 carbon atoms or an aryl, and of mixtures of such olefins with each other and/or with ethylene, and to the catalysts obtained from such components.
    Type: Grant
    Filed: January 28, 1988
    Date of Patent: February 27, 1990
    Assignees: Montedison S.p.A., Mitsui Petrochemical Ind.
    Inventors: Enrico Albizzati, Sandro Parodi, Pier C. Barbe
  • Patent number: 4904761
    Abstract: A semiconductor sealing resin composition which comprises (a) a modified epoxy resin which is a graft copolymer of a epoxy resin and a vinyl polymer having dispersed therein a silicone rubber with an average particle diameter less than 1.0.mu.; (b) a curing agent; and (c) an inorganic filler. The sealing composition has a low elastic modulus, a low heat expansion coefficient, a high resistance to heat and a high resistance to thermal expansion.
    Type: Grant
    Filed: November 22, 1988
    Date of Patent: February 27, 1990
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Yuji Okitsu, Koichi Machida, Motoyuki Torikai, Junko Tsuji, Kotaro Asahina, Kazuya Shinkoda, Takayuki Kubo, Mikio Kitahara
  • Patent number: 4902460
    Abstract: If ultra-high-molecular-weight polyethylene having an intrinsic viscosity (.beta.) of at least 5 dl/g is grafted with a silane compound in the presence of a radical initiator and extrusion-molded and the extrudate is impregnated with a silanol condensation catalyst after or during drawing and is then exposed to water to effect crosslinking, there is obtained a novel molecularly oriented molded article in which increase of the melting temperature, which is not observed in conventional drawmolded or crosslinked molded articles of polyethylene, can be attained, and even if this molecularly oriented molded article is exposed to a temperature of 180.degree. C. for 10 minutes, the molded article is not fused but the shape is retained and even after this heat history, a high strength retention ratio can be maintained.
    Type: Grant
    Filed: April 14, 1988
    Date of Patent: February 20, 1990
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Kazuo Yagi, Hitoshi Mantoku
  • Patent number: 4902837
    Abstract: Processes for preparing biphenols by oxidation coupling of phenols, to which the present invention is directed, are characterized in that said oxidation coupling reaction is carried out under such conditions that the same diphenoquinones as those produced as by-products at the time when said oxidation coupling is effected are added to the reaction system. According to a preferred embodiment of the invention, moreover, the yield of biphenols can be enhanced by the reuse in the abovementioned reaction of diphenoquinones recovered from the reaction mixture containing the same.
    Type: Grant
    Filed: June 13, 1988
    Date of Patent: February 20, 1990
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Michio Tanaka, Yoshito Kurano, Katsuo Taniguchi
  • Patent number: 4900612
    Abstract: A laminated structure comprising, laminated in the order stated,(A) a layer of polycarbonate or a layer of a polyester,(B) a layer of a modified ethylene/alpha-olefin random copolymer, the modified copolymer containing about 0.01 to 10% by weight, based on the trunk ethylene/alpha-olefin random copolymer, of an unsaturated carboxylic acid or its derivative grafted thereto, and having an ethylene content of 75 to 95 mole %, a melt flow rate of 0.1 to 50 g/10 min., a density of 0.850 to 0.905 g/cm.sup.3 and a crystallinity of less than 10%, and(C) a layer of a saponified olefin/vinyl acetate copolymer or a layer of a polyamide resin.
    Type: Grant
    Filed: January 6, 1987
    Date of Patent: February 13, 1990
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Koichiro Sato, Mikio Nakagawa, Kuniaki Kanemoto, Akito Nishimura
  • Patent number: 4900801
    Abstract: A novel epoxy compound having a chemical structure in which an aromatic ring having a glycidyl raedical attached thereto has a tertiary alkyl radical at its ortho or meta-position. An epoxy resin composition comprising the epoxy compound, a curing agent, and a curing accelerator which cures into a product having a low dielectric constant.
    Type: Grant
    Filed: May 27, 1988
    Date of Patent: February 13, 1990
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Toshimasa Takata, Hideo Nakamura
  • Patent number: 4900820
    Abstract: A process for producing a cyclic diamine which comprises reacting a diamine of the formulaR--HN--R'--NH--R (II)wherein R represents a lower alkyl group and R' represents a lower alkyl group-substituted dimethylene group, trimethylene group, a lower alkyl group-substituted trimethylene group, tetramethylene group or a lower alkyl group-substituted tetramethylene group with urea in the presence of a polar solvent and at 180.degree. C. or higher, to obtain a cyclic urea ##STR1## wherein R and R' are each as defined above, the production yield being more improved by carrying out the initial period reaction at 140.degree. C. or lower.
    Type: Grant
    Filed: May 22, 1987
    Date of Patent: February 13, 1990
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Nobuyuki Kajimoto, Teruyuki Nagata, Masaru Wada
  • Patent number: 4900861
    Abstract: A method of producing polysilane compounds which comprises: polymerizing a monomeric silane compound represented by the general formula of ##STR1## wherein R independently represents hydrogen or hydrocarbon group, but not both R's are hydrogen at the same time, in the presence of an organometallic complex of Ni, Co, Ru, Pd or Ir.
    Type: Grant
    Filed: October 7, 1988
    Date of Patent: February 13, 1990
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Keiichi Yokoyama, Katsuo Taniguchi, Yoshihisa Kiso
  • Patent number: 4899517
    Abstract: A hermetically sealed package wherein the inside of a container having shape-retentive capability is formed from a gas barrier plastic material into which an agricultural product such as rice is filled and sealed together with an inert gas provides an efficient storage and transportation system. Once the product is sealed in this package, it is handled in an integral manner from the packaging area to storage through the distribution channels to the final consumption site. A container formed from a high nitrile resin is suitable for applying the system. Shape-retention characteristics is achieved by using a container formed from a gas barrier plastic material packed with an excess of an inert gas, with the amount of the inert gas adsorbed by the agricultural product taken into consideration, or by using a container made of a gas-barrier plastic material, with a smaller part of the wall being made of a film portion which is thinner than the remaining larger portion of the wall.
    Type: Grant
    Filed: October 7, 1987
    Date of Patent: February 13, 1990
    Assignees: Mitsui Toatsu Chemicals, Inc., Kyokujitsu Co., Ltd., Koike Chemical Co., Ltd.
    Inventors: Yoshisuke Shima, Kunihiro Shibazaki, Yoshiyuki Konishi, Toshiro Ryuno, Mitsunobu Fujita, Hisaji Yoshida
  • Patent number: 4898825
    Abstract: A mixture containing a single-chain tissue plasminogen activator (tPA) and/or double-chain tPA is brought into close contact with a column carrying an immobilized Erythrina trypsin inhibitor as an affinity agent. Adsorbed protiens are eluted with eluents having different pHs with or without arginine or benzamidine, so that single-chain tPA is obtained in the eluent with a pH at least 4.5 and double-chain tPA is obtained in the eluent with a pH lower than 4.5.
    Type: Grant
    Filed: April 29, 1987
    Date of Patent: February 6, 1990
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Mitsuyoshi Morii, Masaharu Ohoka, Toshihiko Suzuki, Katsuyuki Suzuki, Nobuhiro Kawashima, Noriko Morii, Kunizo Mori
  • Patent number: 4898414
    Abstract: The water-tight, noise-proof sealed type locking apparatus of this invention has recesses formed in the body 5. In the recess 15 formed on the front side of the body 5 a latch 13 and a rachet 14 are installed; in the recess 16 formed on the back side of the body 5 rotation control members for the rachet 14 is installed. The front of the body 5 is covered with a cover plate 6 and the back with a back plate 7. Wires connected to the rotation control members are fitted water-tightly to the body 5.
    Type: Grant
    Filed: October 4, 1988
    Date of Patent: February 6, 1990
    Assignee: Mitsui Kinzoku Kogyo Kabushiki Kaisha
    Inventor: Shinjiro Yamada
  • Patent number: 4898415
    Abstract: The apparatus for mounting the outer door handle assembly to the automotive door according to the invention comprises: an outer handle body consisting of an engagement projection, an engagement surface, and a flange; and a mounting fitting consisting of an engagement portion for engagement with the engagement projection, a rotatable engagement claw for engagement with the engagement surface, and a projection edge.The outer handle body is inserted from outside into the mounting opening in the outer plate of the door; the engagement portion of the mounting fitting is engaged from inside the door with the engagement projection; and the engagement claw is rotated to engage with the engagement surface. As a result the outer plate of the door is tightly clamped by the flange and the projection edge, thus permitting the outer door handle assembly to be securely mounted to the door without the use of bolts and nuts.
    Type: Grant
    Filed: October 11, 1988
    Date of Patent: February 6, 1990
    Assignee: Mitsui Kinzoku Kogyo Kabushiki Kaisha
    Inventor: Seiki Satoh
  • Patent number: 4898850
    Abstract: Thermally printable sheets, such as paper coated with a polymer such as a polyester or a polyacrylonitrile are colored yellow by a thermal transfer printing process, e.g., using a decal printing transfer sheet, which employs as a yellow dyestuff a 2-pyridone of the formula ##STR1## wherein R.sup.1 is a lower alkyl, and R.sup.2 is lower alkyl, lower alkoxy-lower alkyl, carbocyclic aryl-lower alkyl, cyclo-lower alkyl, lower alkenyl or lower alkoxycarbonylmethyl.
    Type: Grant
    Filed: December 2, 1988
    Date of Patent: February 6, 1990
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Akitosi Igata, Tamio Mikoda
  • Patent number: 4896515
    Abstract: Disclosed are a heat pump, a method of energy recovery in the heat pump and a method of curtailing the required power for driving a compressor in the heat pump, which commonly center essentially upon providing a vapor-liquid separator for separating a working fluid introduced from a condensor through an expansion valve into vapor and liquid, an expansion turbine to be driven by the vapor separated through the vapor-liquid separator, and a compressor adapted to be driven by the expansion turbine, into which turbine a cooling liquid is atomized and sprayed.
    Type: Grant
    Filed: December 4, 1987
    Date of Patent: January 30, 1990
    Assignee: Mitsui Engineering & Shipbuilding Co.
    Inventor: Hajime Endou
  • Patent number: 4897298
    Abstract: A laminate comprising (a) a layer of a partially crosslinked graft-modified polyolefin elastomer formed by dynamically heat-treating a mixture of a peroxide-crosslinking olefin copolymer rubber and an olefinic plastic with an unsaturated carboxylic acid or derivative thereof, an unsaturated epoxy monomer or an unsaturated hydroxy monomer in the presence of an organic peroxide and (b) a layer of a polyamide, polyurethane or polyester is excellent in weatherability, heat resistance and dimension stability, and this laminate is effectively molded into an interior part or sealing material of an automobile, especially a glass run channel. The glass run channel molded from this laminate is excellent in the durability, the tightness of contact with glass at the time of closing and the sliding smoothness at the opening-closing operation.
    Type: Grant
    Filed: September 26, 1988
    Date of Patent: January 30, 1990
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Yasuhiko Otawa, Kunihide Hiraoka, Toshiyuki Maeda, Katsuo Okamoto, Noboru Sakamaki, Shizuo Shimizu
  • Patent number: 4897506
    Abstract: A method for preparing .alpha.-L-aspartyl-L-phenylalanine methyl ester having improved solubilization by the isolation thereof from an aqueous medium containing at least one additive selected from the group consisting of sodium alginate, sodium salt of carboxymethylcellulose, sodium starch glycolate and sodium polyacrylate.
    Type: Grant
    Filed: October 12, 1988
    Date of Patent: January 30, 1990
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Ryuichi Mita, Takeshi Oura, Toshio Katoh, Chojiro Higuchi, Akihiro Yamaguchi, Masanobu Ajioka
  • Patent number: 4897491
    Abstract: The guanidine derivative represented by the formula [III], ##STR1## (commonly known under the name "Cimetidine") is produced by reaction of the compound represented by the formula [I], ##STR2## with a compound represented by the formula [II], ##STR3## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6, is each hydrogen atom, a lower alkyl group, phenyl group, or a radical of --OR.sub.7 or --COOR.sub.7, in which R.sub.7 is hydrogen atom, a lower alkyl group or an alkali metal, followed by reaction with methylamine.
    Type: Grant
    Filed: March 9, 1989
    Date of Patent: January 30, 1990
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Noboru Kawasaki, Yoshiaki Noguchi, Kenichi Fujii