Patents Assigned to Mitsui
  • Patent number: 4806600
    Abstract: A methyl methacrylate syrup composition comprises an intimate mixture of 1-99 parts by weight of a first polymer-in-monomer syrup (A) and 99-1 parts by weight of a second polymer-in-monomer syrup (B), wherein said syrups (A) and (B) are as follows:(A) a polymer-in-monomer syrup obtained by copolymerizing a mixture of methyl methacrylate monomer, one or more monomers having reactivity with glycidyl groups and containing at least one ethylenically-unsaturated bond, and one or more monomers not having reactivity with glycidyl groups and containing at least one ethylenically-unsaturated bond;(B) a polymer-in-monomer syrup obtained by dissolving a copolymer obtained by copolymerizing one or more monomers containing at least one glycidyl group and one or more monomers copolymerizable with glycidyl-containing monomers, having a number average molecular weight of 1,500-50,000 and containing glycidyl groups, in a mixture of monomers comprising one or more monomers selected from the group consisting of methyl methacryl
    Type: Grant
    Filed: August 7, 1987
    Date of Patent: February 21, 1989
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Taisaku Kano, Nobuki Kobayahsi, Yoshinobu Ichihara
  • Patent number: 4804783
    Abstract: Diphenylamines or N,N'-diphenyl-phenylenediamines can be obtained by heat-reacting an aniline or a phenylenediamine with preferably an excess of a phenol in an amount of 4 to 20 moles per mole of the aniline or phenylenediamine in the presence of a hydrogen transfer catalyst and a cyclohexanone corresponding to said phenol.The excess phenol used in the reaction undergoes reduction in the reaction system to form a cyclohexanone, which in turn reacts with the aniline or phenylenediamine to form a Schiff base and is thus consumed. The Schiff base forms the intended product by means of a dehydrogenation reaction, and the hydrogen evolved at this time reduces the phenol to form a cyclohexanone.The phenol present in excess thus becomes in the system a solvent, a starting material for the cyclohexanone, and an acceptor of the hydrogen that forms as a by-product at the time of formation of the intended product.
    Type: Grant
    Filed: July 31, 1987
    Date of Patent: February 14, 1989
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Teruyuki Nagata, Akihiro Tamaki, Nobuyuki Kajimoto, Masaru Wada
  • Patent number: 4802891
    Abstract: A coal-methanol slurry having excellent storage stability, transportability and combustibility has been provided by using coal particles having a maximum particle size not greater than 1,500 .mu.m and a cumulative particle size distribution specified with respective to particles of 74 .mu.m and smaller, 10 .mu.m and smaller and 3 .mu.m and smaller and controlling the concentration of the coal particles within a specific range defined in relation to the degree of carbonization of the coal employed. A useful and advantageous production process of the slurry has also been provided, featuring an addition of water and the timing of its addition.
    Type: Grant
    Filed: March 21, 1988
    Date of Patent: February 7, 1989
    Assignees: Mitsui Mining Company, Limited, Mitsui Toatsu Chemicals, Incorporated
    Inventors: Izumi Yamada, Tetsuya Oishi, Kazuhiko Hanashita
  • Patent number: 4803065
    Abstract: An improved process is provided for the production of chlorine. In a fluidized-bed reactor having a specific equivalent diameter and made of a material with a particular iron content, hydrogen chloride and oxygen are reacted in particular gas volumes and at specific molar ratio, superficial velocity, temperature and pressure in the presence of a catalyst composed principally of a chromium oxide and having a specific particle size distribution. The catalyst is filled in a specific amount in terms of catalyst layer height at rest. The catalyst can retain its high activity.
    Type: Grant
    Filed: June 22, 1987
    Date of Patent: February 7, 1989
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Hiroyuki Itoh, Yoshitsugu Kono, Masanobu Ajioka, Shinji Takenaka, Masafumi Kataita
  • Patent number: 4803258
    Abstract: Disclosed are thermoplastic aromatic polyetherpyridines composed of repeating structural units each containing one or more pyridine rings. These polymers are prepared by reacting a 2,6-dihalogenopyridine with one or two dihydroxy compounds or by reacting a bis(6-chloro-2-pyridyloxy) compound with a dihydroxy compound. The polymers thus obtained have an excellent combination of heat resistance, moldability and other properties, and hence are useful in a wide variety of applications.
    Type: Grant
    Filed: July 23, 1987
    Date of Patent: February 7, 1989
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Keizaburo Yamaguchi, Hideaki Oikawa, Kenichi Sugimoto, Masahiro Ohta, Akihiro Yamaguchi
  • Patent number: 4801672
    Abstract: A random 1-butene copolymer comprising 1-butene and an alpha-olefin having 5 to 20 carbon atoms, said copolymer having the following characteristics (A) to (I):(A) it comprises 50 to 99 mole % of the 1-butene component and 1 to 50 mole % of the alpha-olefin component,(B) it has an intrinsic viscosity [.eta.], measured in decalin at 135.degree. C., of from 0.5 to 6 dl/g,(C) it has a melting point [Tm], measured by a differential scanning calorimeter, of from 30.degree. to 120.degree.0 C.,(D) it has a crystallinity, measured by X-ray diffractometry, of from 5 to 60%,(E) the amount [W.sub.1 in % by weight] of that portion of it which is soluble in boiling methyl acetate is not more than 2%, and(F) the amount [W.sub.2 in % by weight] of that portion of it which is soluble in a 1:1 by volume mixture of acetone and n-decane at 10.degree. C. is less than 5.times.[.eta.].sup.-1.2.
    Type: Grant
    Filed: October 29, 1985
    Date of Patent: January 31, 1989
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Masaki Kohyama, Takeshi Muranaka, Kunisuke Fukui, Norio Kashiwa
  • Patent number: 4801732
    Abstract: This invention relates to an improved process for preparing .alpha.-L-aspartyl-L-phenylalanine methyl ester. More specifically, it relates to a process for preparing .alpha.-L-aspartyl-L-phenylalanine methyl ester which comprises treating, as a raw material, N-formyl-.alpha.-L-aspartyl-L-phenylalanine in methanol in the presence of an acid to form .alpha.-L-aspartyl-L-phenylalanine dimethyl ester, hydrolyzing the .alpha.-L-aspartyl-L-phenylalanine dimethyl ester by bringing it into contact with hydrochloric acid in the presence of methanol as desired, separating the thereby-precipitated .alpha.-L-aspartyl-L-phenylalanine methyl ester hydrochloride and neutralizing the hydrochloride. Further, this invention also provides a process for preparing .alpha.-L-aspartyl-L-phenylalanine methyl ester capable of using, as a raw material, N-formyl-.alpha.-L-aspartyl-L-phenylalanine which contains N-formyl-.beta.-L-aspartyl-L-phenylalanine in an amount of 30% by weight or less.
    Type: Grant
    Filed: March 22, 1988
    Date of Patent: January 31, 1989
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Ryuichi Mita, Takeshi Oura, Chojiro Higuchi, Toshio Katoh, Akihiro Yamaguchi
  • Patent number: 4800160
    Abstract: Enzyme-containing granules are produced by forming drops of a gellable enzyme-containing liquid with a rotating disc and bringing the drops in contact with a gelling solution. The disc is preferably contained in a column, and the gelling solution flows down walls of the column to a reservoir in a lower legion of the column. Drops of the enzyme-containing liquid from the rotating disc contact the gelling solution while flowing down the walls and are carried to the reservoir. Preferably, the enzyme-containing liquid is an aqueous alginate solution containing the enzyme and the gelling solution is an aqueous calcium chloride solution.
    Type: Grant
    Filed: July 28, 1986
    Date of Patent: January 24, 1989
    Assignee: Mitsui Toatsu Chemical, Incorporated
    Inventors: Seiya Iguchi, Takeshi Noguchi, Hiroshi Kimura, Masayo Aihara
  • Patent number: 4800130
    Abstract: Disclosed is a laminate excellent in the surface gloss and scratch resistance, which comprises a thermoplastic elastomer layer composed mainly of a composition comprising a polyolefin and an olefinic copolymer elastomer, at least one of which is partially crosslinked, and a layer of a partially neutralized ionomer resin or 1-olefin/(meth)acrylic acid copolymer resin having a free carboxyl group, both the layers being tightly bonded to each other.
    Type: Grant
    Filed: January 15, 1987
    Date of Patent: January 24, 1989
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Katsuyoshi Yonekura, Akira Uchiyama, Akira Matsuda
  • Patent number: 4798866
    Abstract: A branched alpha-olefinic polymer composition having excellent melt flowability, good moldability and excellent melt tension and comprising at least two branched alpha-olefinic polymers each composed of (A) recurring units derived from a branched alpha-olefin containing 5 to 10 carbon atoms and having a branch at the 3-position or a position of a higher number and (B) recurring units derived from a linear alpha-olefin containing 2 to 20 carbon atoms; and a process for producing this polymer composition by a multiplicity of polymerization steps using a catalyst formed from (A) a highly stereoregular titanium catalyst component comprising magnesium, titanium, halogen and an electron donor as essential ingredient, (B) an organoaluminum compound and (C) an electron donor.
    Type: Grant
    Filed: July 13, 1987
    Date of Patent: January 17, 1989
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Junichi Yoshitake, Hiroaki Kitani, Norio Kashiwa, Takeshi Muranaka, Kenichi Tominari, Shigeki Nagamatsu
  • Patent number: 4798781
    Abstract: Disclosed herein is a fabrication process of an optical recording medium permitting writing and reading-out of signals without any reflective layer. The medium is fabricated by coating, on a transparent thermoplastic resin substrate havnig pregrooves and pits or holes for preformatting signals, a dye solution of a phthalo/naphthalocyanine dye represented by the following general formula (I): ##STR1## wherein M means a metal, metal oxide or metal halide, and L.sub.1, L.sub.2, L.sub.3 and L.sub.4 mean individually a benzene or naphthalene ring skeleton which is unsubstituted or substituted by at least one monovalent substituent --Z selected from the class consisting of the following substituents: --R.sup.1, --OR.sup.2, --SiR.sup.3 R.sup.4 R.sup.5, --SR.sup.6, --COR.sup.7, --COOR.sup.8, --COHNR.sup.9, --NR.sup.10 R.sup.11, --R.sup.12 OR.sup.13, and --R.sup.14 X wherein R.sup.1 -R.sup.14 denote individually a hydrocarbon group having from 1 to 12 carbon atoms and X stands for a halogen atom.
    Type: Grant
    Filed: July 31, 1986
    Date of Patent: January 17, 1989
    Assignees: Mitsui Toatsu Chemicals, Incorporated, Yamamoto Chemicals, Inc.
    Inventors: Sumio Hirose, Hiroshi Ozawa, Kenji Abe, Yoichi Hosono
  • Patent number: 4798654
    Abstract: This invention relates to a process for preparing 2,2-bis(4-hydroxyphenyl)propane, e.g. bisphenol A and particularly to a process for preparing high quality bisphenol A with good workability by distilling the intermediate adduct of bisphenol A and phenol.The adduct of bisphenol A and phenol is fed to a distillation column. Phenol is recovered from the top of the column and bisphenol A is obtained from its bottom. In this distillation process, the adduct of bisphenol A and phenol is added with a part of recycled bottom liquid. Consequently troubles such as plugging of the distillation column are prevented, continuous operation becomes possible for a long period of time and high quality bisphenol A can be steadily obtained.
    Type: Grant
    Filed: April 21, 1988
    Date of Patent: January 17, 1989
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Shigeru Iimuro, Takashi Kitamura, Yoshio Morimoto
  • Patent number: 4797265
    Abstract: A process for the production of highly concentrated phosphoric acid, comprises improvements in digesting phosphate rock with a mixed acid consisting essentially of sulfuric acid and phosphoric acid to obtain a slurry comprising phosphoric acid and hemihydrate (CaSO.sub.4.1/2H.sub.2 O), then filtering the slurry, taking out highly concentrated phosphoric acid as product acid and subsequently hydrating the hemihydrate to obtain gypsum (dihydrate: CaSO.sub.4.2H.sub.2 O).
    Type: Grant
    Filed: March 12, 1987
    Date of Patent: January 10, 1989
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Tadashi Inoue, Akira Ohkoba, Kunio Sakashita, Akira Utsunomiya, Takeki Shinozaki, Minoru Ieda
  • Patent number: 4797177
    Abstract: An organic membrane is stretched over, or adhered to, a frame or a substrate, and that part of the membrane which extends out of the frame or substrate is cut by bringing an injection syringe-like needle into contact with, or approach to, the lateral end surface of the frame or substrate and while moving the needle along said lateral end surface, injecting an organic solvent from the needle and dissolving said membrane along the lateral end surface of the frame or substrate. By this method, the organic membrane can be cut without generating foreign matter such as cut dust.
    Type: Grant
    Filed: February 1, 1988
    Date of Patent: January 10, 1989
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Toshio Kaya, Makoto Fujimoto
  • Patent number: 4797466
    Abstract: This invention relates to a novel polyimide and describes method of its preparation, adhesives of the polyimide and the method for their application.The polyimide has recurring units of the formula ##STR1## (where R is a tetra-valent radical selected from the group consisting of aliphatic radical 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).The polyimide can be prepared by reacting 2,6-bis(3-aminophenoxy)pyridine with tetracarboxylic dianhydride in an organic solvent and imidizing resultant polyamic acid.Various tetracarboxylic dianhydrides can be used and particularly prefered are pyromellitic dianhydride and 3,3',4,4'-benzophenonetetracarboxylic dianhydride.
    Type: Grant
    Filed: February 6, 1987
    Date of Patent: January 10, 1989
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Hideaki Oikawa, Masahiro Ohta, Saburo Kawashima, Shoji Tamai, Yoshiho Sonobe, Akihiro Yamaguchi
  • Patent number: 4797242
    Abstract: A method for molding a thermosetting resin pipe having a balanced compressive strength between the axial direction and the direction normal to the pipe axis is disclosed. The method includes steps of molding a thermosetting resin in a smooth zone in the front section of a screw to such an extent that the resin after being extruded from the cylinder is capable of retaining its own shape, and orienting the resin and/or a fibrous filler randomly. An apparatus for producing such a thermosetting resin, and a thermosetting resin having a balanced compressive strength are also disclosed.
    Type: Grant
    Filed: December 23, 1986
    Date of Patent: January 10, 1989
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Yoshiaki Fukuda, Takeshi Miyasaka, Iori Matsumoto, Nobukatsu Kato, Kenji Ema
  • Patent number: 4795798
    Abstract: This invention discloses high-temperature adhesives having a good light-transmittance and excellent high-temperature flowability which comprises polyimide having recurring units represented by the following formula (I) ##STR1## (where R is a tetra-valent radical selected from the group consisting of aliphatic radical 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: February 25, 1987
    Date of Patent: January 3, 1989
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Shoji Tamai, Saburo Kawashima, Masahiro Ohta, Hideaki Oikawa, Kouji Ohkoshi, Akihiro Yamaguchi
  • Patent number: 4795795
    Abstract: A polyamide and/or polyimide is prepared by using N,N'-dimethylethyleneurea or N,N'-dimethylpropyleneurea as a solvent upon polycondensation of a polycarboxylic acid and a diisocyanate at a temperature above 100.degree. C. in the presence of an alkali metal carbonate, alkali metal hydrogencarbonate, alkali metal hydroxide or an alkali metal salt of a polycarboxylic acid.
    Type: Grant
    Filed: February 12, 1986
    Date of Patent: January 3, 1989
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Masahiro Kouno, Kazumi Mizutani, Masanori Osawa, Kohei Shizuka, Toshihiro Toyoda, Hiromi Nakano
  • Patent number: 4792565
    Abstract: Novel pyrazole derivatives of the general formula (I) ##STR1## wherein R.sup.1 represents an alkyl, haloalkyl, alkenyl, haloalkenyl or phenyl group, R.sup.2 and R.sup.3 each represent a hydrogen or halogen atom, or an alkyl, haloalkyl, alkoxy, alkoxyalkyl or phenyl group, and R.sup.4 represents an alkyl, alkenyl, haloalkenyl or phenyl group, or a heterocyclic aromatic group which contains at least one of oxygen, nitrogen and sulfur atoms and may be unsubstituted or substituted,which are useful as agricultural and horticultural fungicides. The pyrazole derivatives can be produced by reacting compounds of the general formula (III) ##STR2## wherein R.sup.1, R.sup.2 and R.sup.3 are as defined above, and X represents a halogen atom,with aminoacetonitriles of the general formula (IV) ##STR3## wherein R.sup.4 is as defined above, or salts thereof.
    Type: Grant
    Filed: April 16, 1987
    Date of Patent: December 20, 1988
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Hitoshi Shimotori, Tutomu Ishii, Hideo Yamazaki, Toshiaki Kuwatsuka, Yuji Yanase, Yoshinori Tanaka
  • Patent number: 4792389
    Abstract: The invention describes a process for producing light products, such as engine and diesel fuels, and fuel oils for conventional use by thermal conversion of heavy metal- and sulfur-rich-crude oil residues. Thermal cracking of the residues is done by mild cracking in several stages, where the residue remaining after separation of the conversion products of the preceding stage is fed to the respective subsequent stage.
    Type: Grant
    Filed: May 1, 1987
    Date of Patent: December 20, 1988
    Assignees: VEB Petrochemisches Kombinat Schwedt, Toyo Engineering Corporation, Mitsui Coke Co., Ltd.
    Inventors: Werner Frohn, Dieter Bohlmann, Hermann Franke, Werner Zimmermann, Heinz Limmer, Eberhard H/o/ pfner, Horst Lindner, Reinhard Matthey, Henner M/u/ ller, Hans Poppen, Hartmut Sch/u/ tter, Detlev Dietrich