Patents Assigned to Mitsui Toatsu Chemicals, Inc.
  • Patent number: 6090892
    Abstract: Disclosed herein are a (co)polymer comprising, as an essential component, a (co)polymer containing a recurring unit in a predetermined proportion, and its production process. The recurring unit contains a specific amido group and/or a particular hydroxyl group as a pendant group. This (co)polymer is generally obtained in the form of powder and features extremely easy redispersion, and is useful especially as a cement additive for improving physical properties of cement.
    Type: Grant
    Filed: July 12, 1996
    Date of Patent: July 18, 2000
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Tadashi Ishida, Yoshio Kikuta, Futoshi Hoshino, Katsunari Matsumoto
  • Patent number: 5908826
    Abstract: A freeze-dried monoclonal antibody preparation is prepared by adding to a solution of the monoclonal antibody gelatin or carboxylic acid or its salt, to prevent denaturation of the monoclonal antibodies during freeze-drying. Freeze-dried monoclonal antibody preparations having stablized antigen-binding activity result and may be used as an adminiculum for immunoauxotherapy for prophylaxis and treatment of bacterial infectious diseases and viral infectious diseases.
    Type: Grant
    Filed: November 14, 1994
    Date of Patent: June 1, 1999
    Assignee: Mitsui Toatsu Chemicals Inc.
    Inventors: Tamotsu Fukuda, Yukio Shimazaki, Yasuyuki Kuroiwa, Shiro Takagi
  • Patent number: 5869184
    Abstract: Provided by the present invention are novel diguanamine derivatives, led by 2,5/2,6-bis(4,6-diamino-1,3,5-triazin-2-yl)-bicyclo?2.2.l!heptanes and 1,3/1,4-bis(4,6-diamino-1,3,5-triazin-2-yl)-cyclo-hexanes, and derivatives thereof, applications of these compounds in fields such as adhesives and paints, utilization of these compounds in flame-retarding, thermal stabilization and compatibilization methods of resins, thermosetting molding compositions and thermosetting expansion-molding compositions making use of these compounds, as well as polymeric microspheres also using these compounds. These compounds are expected to find wide spread industrial utility as various excellent properties can be obtained by using them.
    Type: Grant
    Filed: February 14, 1997
    Date of Patent: February 9, 1999
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Tetsuya Oishi, Jin Suzuki, Kouhei Ohkawa, Satoshi Furusawa, Hiroshi Ono, Kazuo Sugazaki
  • Patent number: 5837797
    Abstract: A novel polythiol having four or more functional groups, a process for producing the polythiol comprising reacting thiourea with a specific compound, a sulfur-containing urethane-based resin prepared from the polythiol and a lens made of the resin. The resin has a high refractive index, and low dispersion of refractive index, is lightweight, colorless and transparent, has no optical distortion, and has excellent characteristics in weatherability, dye-affinity, heat resistance, impact resistance and machinability.
    Type: Grant
    Filed: November 25, 1996
    Date of Patent: November 17, 1998
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Koju Okazaki, Yoshinobu Kanemura, Teruyuki Nagata
  • Patent number: 5830732
    Abstract: A novel phytase is disclosed. The phytase consists essentially of a single type of subunits, and can hydrolyze a phytate to myo-inositol. A gene encoding the phytase, which is originated from Schwanniomyces occidentalis is also disclosed.
    Type: Grant
    Filed: July 3, 1995
    Date of Patent: November 3, 1998
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Daisuke Mochizuki, Junko Tokuda, Tadashi Suzuki, Masao Shimada, Shin-ichirou Tawaki
  • Patent number: 5798422
    Abstract: Disclosed are an aromatic hydroxycarboxylic acid resin represented by the following formula (1): ##STR1## wherein each A group is the same or different and individually represents a substituted or unsubstituted phenylene or naphthylene group, R.sup.1 represents a hydrogen atom or a C.sub.1-4 alkyl group, R.sup.2 represents a hydrogen atom or a C.sub.1-10 alkyl, C.sub.1-10 alkoxyl, nitro or hydroxyl group, l stands for an integer of 0-100, m stands for an integer of 0-20 and n stands for an integer of 0-3 with the proviso that m stands for an integer other than 0 when all of the A group represent an unsubstituted or substituted a group, a preparation process thereof and use of the same.
    Type: Grant
    Filed: August 7, 1995
    Date of Patent: August 25, 1998
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Akio Karasawa, Akihiro Yamaguchi, Keizaburo Yamaguchi, Yuko Ishihara
  • 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: 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: 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: 5763537
    Abstract: A is a polyimide based resin molding composition comprising 100 parts by weight of crystalline polyimide having recurring structural units of the formula (1): ##STR1## and 1.about.50 parts by weight of crystallization accelerators selected from bisimide compounds of specific structure, a mixture of bisimide compounds, and imide based oligomer. The composition remarkably accelerates the crystallization velocity of polyimide of the formula (1), crystallization can be completed within a greatly reduced cooling time after melt processing, and the crystallized polyimide resin has excellent properties.
    Type: Grant
    Filed: December 22, 1995
    Date of Patent: June 9, 1998
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Tomomi Yoshimura, Wataru Yamashita, Shoji Tamai, Akihiro Yamaguchi
  • 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
  • Patent number: 5759469
    Abstract: A molded article of a syndiotactic polypropylene having excellent transparency in which a melting point attributed to the polypropylene having the syndiotactic structure measured at a heating rate of 10.degree. C./minute by differential scanning thermal analysis is represented by a substantially single peak, the aforesaid molded article being prepared by heating, melting and then hot-molding a homopolymer of propylene or a copolymer of propylene and a small amount of another olefin, which have a substantially syndiotactic structure, or a mixture of the homopolymer or the copolymer and a small amount of a polypropylene having a substantially isotactic structure, followed by quenching, or, after these steps, additionally subjecting the above molded article to a heat treatment at a temperature of less than its melting point. A method for preparing the above molded article is also disclosed here.
    Type: Grant
    Filed: September 25, 1996
    Date of Patent: June 2, 1998
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Tadashi Asanuma, Tateyo Sasaki, Mitsuru Ito, Tetusnosuke Shiomura
  • Patent number: 5760187
    Abstract: A human growth hormone can be purified by allowing a solution containing the human growth hormone to contact with a blue pigment-bonded carrier in order to selectively adsorb the human growth hormone, then eluting the human growth hormone with an eluant of high ionic strength or an eluant containing a protein denaturing agent. This method readily enables the mass production of a highly purified human growth hormone.
    Type: Grant
    Filed: February 19, 1997
    Date of Patent: June 2, 1998
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Yuji Nagatomi, Kunizo Mori, Hideki Kobayashi, Nobumi Kusuhara
  • Patent number: 5759810
    Abstract: In producing a recombinant protein in the periplasm of Escherichia coli, the productivity of the target ecombinant protein can be promoted by coexpressing glutathione reductase artificially with the target recombinant protein.
    Type: Grant
    Filed: March 28, 1996
    Date of Patent: June 2, 1998
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Masaru Honjo, Naokazu Naito, Hiroshi Uchida
  • Patent number: 5756319
    Abstract: S-phenyl-L-cysteine can be produced in a high yield by reacting thiophenol and L-serine under the action of tryptophan synthase at a pH in a range of from 9.0 to 10.5. Purification of S-phenyl-L-cysteine obtained by this enzyme reaction can be effectively achieved by adjusting the pH of a crystal-containing reaction mixture to a strongly acidic level of 1.5 or lower to dissolve crystals of S-phenyl-L-cysteine, adding activated carbon to the pH-adjusted mixture, maintaining the resultant mixture at a temperature of from 20.degree. to 60.degree. C. under aeration with an oxygen-containing gas, subjecting the thus-obtained mixture to filtration, raising the pH of the resulting filtrate back to a range of from 2.5 to 6.0 to precipitate crystals of S-phenyl-L-cysteine and then recovering the thus-precipitated crystals.
    Type: Grant
    Filed: July 10, 1996
    Date of Patent: May 26, 1998
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Kazuhiro Fukuta, Nobuhiro Fukuhara
  • Patent number: 5756766
    Abstract: A composition for optical materials is herein disclosed which comprises the following two components (a) and (b):(a) a component containing at least one of poly isocyanates represented by the formula (1) ##STR1## wherein A is an alkanediyl group or an alkanetetrayl group which may contain a sulfur atom, or a dithianetetrayl group, and the alkanediyl group or the alkanetetrayl group may be substituted by a phenyl group; B is a methylene chain represented by .paren open-st.CH.sub.2 .paren close-st..sub.m (m is an integer of 1 to 4) which may contain a sulfur atom, and B's may be the same or different; and n is an integer of 2 or 4, and(b) a component containing at least one of polythiols having two or more mercapto groups. The composition is useful to provide optical products such as plastic lenses, filters, substrates for recording media and optical fibers which have a very high refractive index and which are excellent in heat resistance.
    Type: Grant
    Filed: March 24, 1997
    Date of Patent: May 26, 1998
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Nobuya Kawauchi, Katsuyoshi Sasagawa, Seiichi Kobayashi
  • Patent number: 5753730
    Abstract: One aspect of the present invention relates to a process for preparing plastic lenses having a high-refractive index comprising forming a mixture containing one or more polyisocyanate compounds; one or more active hydrogen compounds selected from the group consisting of a polyol compound having no sulfur atom, a polyol compound having at least one sulfur atom, and a polythiol compound having at least one sulfur atom in addition to the sulfur atom contained in mercapto group and at least one internal releasing agent and then casting and polymerizing the mixture.
    Type: Grant
    Filed: May 15, 1991
    Date of Patent: May 19, 1998
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Teruyuki Nagata, Koju Okazaki, Tohru Miura, Nobuyuki Kajimoto, Yoshinobu Kanemura, Katsuyoshi Sasagawa, Masao Imai
  • Patent number: 5751483
    Abstract: The present invention relates to a color filter having polarizability, which comprises a dye having a spectral transmissibility, a dichroic dye having a polarizability, corresponding to the former dye and a base resin. The filter can be produced by coating and fixing the former dye on a monochromatic polarizing film produced by using the dichroic dye; mixing the former dye, the dichroic dye and the base resin, melting and extruding the mixture to produce a film and monoaxially stretching the film; dyeing a transparent film with the former dye and the dichroic dye and then monoaxially stretching the dyed film; or dyeing a transparent monoaxially stretched film with the former dye and the dichroic dye.
    Type: Grant
    Filed: August 1, 1995
    Date of Patent: May 12, 1998
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Hisato Itoh, Tsutami Misawa, Akira Ogiso, Rihoko Imai
  • Patent number: 5750229
    Abstract: A phthalocyanine represented by the formula (1) ##STR1## wherein each of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 is independently an alkyl group substituted by 0 to 5 halogen atoms and having 1 to 20 carbon atoms, an alkenyl group substituted by 0 to 5 halogen atoms and having 2 to 20 carbon atoms or an alkynyl group substituted by 0 to 5 halogen atoms and having 2 to 20 carbon atoms, and at least one of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 is substituted by the halogen atom; X is a halogen atom; each of k, l, m and n is independently a value of from 0 to 3; each of o, p, q and r is independently a value of 0, 1 or 2, and all of them are not 0 simultaneously; each sum of k and o, l and p, m and q, and n and r is independently in the range of from 0 to 4; Met is two hydrogen atoms, a di, monosubstituted tri, disubstituted ter metal atom or an oxymetal atom. The above phthalocyanins can be used to provide optical recording medium.
    Type: Grant
    Filed: January 6, 1997
    Date of Patent: May 12, 1998
    Assignees: Mitsui Toatsu Chemicals, Inc., Yamamoto Chemicals, Inc.
    Inventors: Takahisa Oguchi, Hideki Umehara, Kenichi Sugimoto, Ryu Oi, Hisato Itoh