Patents Assigned to Mitsui Toatsu Chemicals
  • Continuous process for the treatment of polymer composition to remove unreacted monomer and solvent
    Patent number: 4699976
    Abstract: Disclosed is a continuous treating process of a rubber modified styrenic polymer composition produced by bulk or solution polymerization and containing at least 1% by weight of a rubber component and at least 16% by weight of the total amount of an unreacted monomer and solvent which process comprises treating the polymer composition in two-step volatile component separation apparatuses, each of which comprises a multi-tube preheater and a volatilizer, to remove the unreacted monomer and other volatile components wherein the first treated composition contains 3-15% by weight of the unreacted monomer and solvent.
    Type: Grant
    Filed: March 25, 1986
    Date of Patent: October 13, 1987
    Assignees: Mitsui Toatsu Chemicals, Inc., Toyo Engineering Corporation
    Inventors: Tetsuyuki Matsubara, Norifumi Ito, Mune Iwamoto, Toshihiko Ando
  • Resin compostion for porous film and film prepared therefrom
    Patent number: 4699733
    Abstract: A porous film having a good water vapor permeability is obtained with a high productivity by melting a resin composition comprising 100 parts by weight of a polyolefin resin and 50 to 500 parts by weight of barium sulfate having an electric conductivity of 250 .mu.S/cm or less in terms of the electric conductivity of a supernatant formed when the barium sulfate is added to water, and a particle size of 0.1 to 7 .mu.m, making the melt into a film and stretching the film to 2.5 to 14 times the original area at least in the uniaxial direction.
    Type: Grant
    Filed: December 11, 1986
    Date of Patent: October 13, 1987
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Shuji Matsumura, Michiyasu Ito, Syoichi Tsuji, Hisatosi Suzuki, Syoichi Ito
  • Radiation-curable coating composition
    Patent number: 4694052
    Abstract: Disclosed herein is a coating composition which contains a urethane-modified (meth)acrylate compound and a mono(meth)acrylate and is curable upon its exposure to radiation. Also disclosed herein is a coating, especially, a primary coating for an optical fiber, which coating or cladding is composes of a cured material obtained by curing the composition through its exposure to radiation.
    Type: Grant
    Filed: June 25, 1985
    Date of Patent: September 15, 1987
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Sumio Hirose, Isao Naruse, Akio Matsuyama
  • Process for production of m-phenoxybenzyl alcohol
    Patent number: 4694110
    Abstract: A process for producing m-phenoxybenzyl alcohol which comprises reacting chlorobenzene with m-hydroxybenzyl alcohol in the presence of a copper compound as a catalyst and a base, characterized in that chlorobenzene is added to a polar solvent having a higher boiling point than chlorobenzene, the amount of chlorobenzene being 0.05 to 4.0 times the weight of the polar solvent; at least one compound selected from alkali hydroxides, alkali carbonates and alkali bicarbonates is used as the base in an amount of 1.0 to 2.0 gram-equivalents per mole of m-hydroxybenzyl alcohol; and the reaction is carried out at a temperature of 140.degree. to 200.degree. C. while removing the generated water as an azeotrope with chlorobenzene.
    Type: Grant
    Filed: May 9, 1986
    Date of Patent: September 15, 1987
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Shinji Takenaka, Ryu Oi
  • N-(2-chloro-4-trifluoromethylphenyl)-3-trifluoromethylbenzenesulfonamide derivative and agricultural fungicide containing same
    Patent number: 4692466
    Abstract: Disclosed herein are N-(2-chloro-4-trifluoromethylphenyl)-3-trifluoromethylbenzensulfonamide derivatives represented by the following general formula (I): ##STR1## wherein X and Y individually mean a hydrogen or chlorine atom, and agricultural fungicides containing said derivatives.
    Type: Grant
    Filed: February 21, 1986
    Date of Patent: September 8, 1987
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Takeo Yoshimoto, Mitsumasa Umemoto, Keiichi Igarashi, Yutaka Kubota, Hideo Yamazaki, Yuji Enomoto, Hirohisa Yanagita
  • Process for producing 1,3-bis(3-aminophenoxy)benzene
    Patent number: 4692554
    Abstract: A process for producing 1,3-bis(3-aminophenoxy)-benzenes which are very useful as a monomer for heat-resistant high molecular weight polymers is provided, which process comprises dehalogenating a bis(3-aminophenoxy)-halogenobenzene by its reduction, which compound is selected from the group consisting of 1,3-bis(3-aminophenoxy)-5-halogenobenzenes, 1,3-bis(3-aminophenoxy)-2,4-dihalogenobenzenes and 1,5-bis(3-aminophenoxy)-2,4-dihalogenobenzenes, these raw material compounds being respectively obtained by reacting a 1,3,5-trihalogenobenzene, a 1,2,3,4-tetrahalogenobenzene or a 1,2,4,5-tetrahalogenobenzene with 3-aminophenol in the presence of a dehydrohalogenating agent.
    Type: Grant
    Filed: August 7, 1984
    Date of Patent: September 8, 1987
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Keizaburo Yamaguchi, Yukihiro Yoshikawa, Yoshimitsu Tanabe, Kenichi Sugimoto, Akihiro Yamaguchi
  • S-alkyl thiocarbamate base lens resin
    Patent number: 4689387
    Abstract: An S-alkyl thiocarbamate base lens resin is obtained by reacting one or more NCO-containing compounds, such as xylylene diisocyanate, hexamethylene diisocyanate and/or tetrachloroxylylene diisocyanate, with one or more SH-containing aliphatic compounds, for example, a di(2-mercaptoalkyl) ether.
    Type: Grant
    Filed: March 24, 1986
    Date of Patent: August 25, 1987
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Nobuyuki Kajimoto, Akihiro Tamaki, Teruyuki Nagata
  • Polyimide adhesives, coats and prepreg
    Patent number: 4687836
    Abstract: This invention relates to a polyimide powder in use for adhesion and/or coat forming and to a method of preparing said powder, wherein polyamic-acid is chemically imidized which is obtained by reacting tetracarboxylic acid dianhydride with diamine in organic solvents.This invention further relates to a method for adhesion and coat forming by using said polyimide powder.This invention still further relates to a method for preparing prepreg by using said polyimide powder, and a method for adhesion and preparing molded laminates by using said prepreg.
    Type: Grant
    Filed: October 10, 1985
    Date of Patent: August 18, 1987
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Akira Ibi, Takushi Sato, Akihiro Yamaguchi, Shigeru Takahashi, Shigeyuki Shishido, Shoji Tamai, Hisai Nakajima
  • Process for producing m-hydroxybenzyl alcohol
    Patent number: 4684449
    Abstract: A process for producing m-hydroxybenzyl alcohol which comprises electrolytically reducing m-hydroxybenzoic acid in an acidic aqueous solution at a temperature of 20.degree. to 70.degree. while m-hydroxybenzyl alcohol is present always in the electrolytic solution. The constant presence of m-hydroxybenzyl alcohol is effected by (1) continuously adding m-hydroxybenzoic acid to the electrolytic solution in an amount corresponding to that consumed as the electrolytic reaction proceeds, or (2) by continuously adding m-hydroxybenzoic acid and the acidic aqueous solution to the electrolytic solution.
    Type: Grant
    Filed: November 19, 1986
    Date of Patent: August 4, 1987
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Shinji Takenaka, Ryu Oi, Chitoshi Shimakawa
  • Agent for absorbing and releasing water vapor
    Patent number: 4683258
    Abstract: Disclosed herein is an agent for absorbing and releasing water vapor, which comprises a homopolymer of at least one monomer selected from specific N-alkyl- or N-alkylene-substituted acrylamides and methacrylamides, a copolymer of two or more of the acrylamides and methacrylamides, a copolymer of said at least one monomer with one or more monomers other than the acrylamides and methacrylamides and copolymerizable therewith, or a water-insolubilized product of the homopolymer or either one of the copolymers. The above agent has broad utility for humidity contol of gases, humidity control in green houses and prevention of fogging on surfaces of transparent materials, as humidity sensors and dew sensors, etc.
    Type: Grant
    Filed: January 17, 1986
    Date of Patent: July 28, 1987
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Hiroshi Itoh, Toshimi Nakagawa, Atsuhiko Nitta, Tomio Tanaka, Hideo Kamio, Ryosuke Enoshita, Tamotu Uejima, Takahiro Ouchi, Kazuki Abe, Sadao Kobayashi
  • Sulfur-containing polyurethane base lens resin
    Patent number: 4680369
    Abstract: A sulfur-containing polyurethane base lens resin is obtained by reacting one or more isocyanate compounds, which have two or more NCO groups, with one or more OH-containing compounds, which have two or more OH groups, in such proportions that the molar ratio of NCO groups to OH groups ranges from 0.5 to 1.5. At least one of said one or more OH-containing compounds contains one or more sulfur atoms in the molecule thereof. The total content of sulfur atoms in all OH-containing compounds is 20 wt. % or higher.
    Type: Grant
    Filed: March 24, 1986
    Date of Patent: July 14, 1987
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Nobuyuki Kajimoto, Akihiro Tamaki, Teruyuki Nagata
  • Preparation process of N-acylphenylalanines
    Patent number: 4675439
    Abstract: A process for preparing an N-acylphenylalanine represented by the formula (II): ##STR1## wherein R.sub.3 and R.sub.4 mean individually a hydrogen atom or an alkyl, alkoxy, phenoxy, hydroxy or methylenedioxy group, and R denotes a methyl or phenyl group, which comprises catalytically reducing an N-acyl-.beta.-phenylserine represented by the formula (I): ##STR2## wherein R.sub.1 and R.sub.2 mean individually a hydrogen atom or an alkyl, alkoxy, phenoxy, benzyloxy or methylenedioxy group, and R has the same meaning as defined in the formula (II), in the presence of a reducing catalyst or both reducing catalyst and acid, in a solvent.
    Type: Grant
    Filed: November 4, 1985
    Date of Patent: June 23, 1987
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Ryuichi Mita, Toshio Katoh, Chojiro Higuchi, Akihiro Yamaguchi
  • Aminobenzylamine composition
    Patent number: 4671890
    Abstract: A composition of aminobenzylamine is provided which is mainly composed of m-aminobenzylamine and p-aminobenzylamine in either the presence or absence of a small quantity of o-aminobenzylamine, is liquid at room temperature, and is an excellent cold-setting type curing agent useful for thermosetting resin compositions.
    Type: Grant
    Filed: June 17, 1985
    Date of Patent: June 9, 1987
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Keizaburo Yamaguchi, Kenichi Sugimoto, Yoshimitsu Tanabe, Midori Yamazaki, Akihiro Yamaguchi
  • Preparation process of acrylamide crystals
    Patent number: 4670590
    Abstract: Acrylamide crystals are prepared from an aqueous solution of acrylamide by causing the aqueous solution and a coolant to flow inside each electrolytically-polished cooling tube of a double-walled or shell-and-tube heat exchanger and outside the cooling tube, respectively, instead of relying upon vacuum crystallization.
    Type: Grant
    Filed: April 11, 1986
    Date of Patent: June 2, 1987
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Yoshihiko Kambara, Shiro Asano, Wataru Isozaki, Syoji Kitado, Masao Yamaguchi
  • Process for producing 1,3-dimethyl-2-imidazolidinone
    Patent number: 4668793
    Abstract: A process for producing 1,3-dimethyl-2-imidazolidinone with a high yield which comprises reacting N,N'-dimethylethylene diamine and/or its hydrochloride with phosgene in the presence of a substantial amount of water and a dehydrochlorinating agent. Particularly, higher yield is attained by carrying out the reaction in water medium while controlling a pH to the range of 3.0 to 10.0 by adding a dehydrochlorinating agent.
    Type: Grant
    Filed: November 1, 1985
    Date of Patent: May 26, 1987
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Teruyuki Nagata, Nobuyuki Kajimoto, Masaru Wada, Hitoshi Nakayama, Tadao Yamada
  • Magnetic powder and production process thereof
    Patent number: 4668283
    Abstract: Magnetic powder protected from subsequent oxidation and deterioration can be obtained by effecting contact of starting magnetic powder, which is formed of an intermetallic compound containing a rare-earth metal and an iron-group metal as principal components thereof, with a phosphorus compound containing at least one active proton having a pKa of 4 or smaller and exposure of the starting magnetic powder to an oxygen-containing atmosphere in an arbitrary order or simultaneously. Production of a plastic magnet with the magnetic powder of this invention allows to avoid danger and deterioration in magnetic characteristics of the resulting product due to oxidation of the magnetic powder even if exposed to elevated temperatures during its production or use.
    Type: Grant
    Filed: June 20, 1985
    Date of Patent: May 26, 1987
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Tadatoshi Honda, Takeshi Tsuda
  • Process for disproportionating silanes
    Patent number: 4667048
    Abstract: A process for disproportionating silanes, which comprises contacting a silane having at least one Si--H bond represented by the general formulaR.sub.l H.sub.m SiX.sub.4-(l+m)wherein R represents an alkyl or aryl group, X represents a halogen atom or an alkoxy group, l is 0, 1 or 2, and m is 1, 2 or 3 and l+m is 1, 2 or 3, and when l is 2, R's may be identical or different, and when l+m is 1 or 2, X's may be identical or different, with a reaction product of a strong acid-type cation exchange resin with an amine and disproportionating the silane.
    Type: Grant
    Filed: June 9, 1986
    Date of Patent: May 19, 1987
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Kaoru Inoue, Hiroharu Miyagawa, Masayoshi Itoh, Tomohiro Abe, Kyogo Koizumi, Noriyuki Yanagawa
  • Process for the preparation of 5,6,7,8-tetrahydrofolic acid
    Patent number: 4665176
    Abstract: A process for the preparation of 5,6,7,8-tetrahydrofolic acid which comprises dissolving and/or suspending folic acid or dihydrofolic acid in an aqueous solution containing an inorganic base, and bringing the resulting solution or suspension into contact with hydrogen in the presence of a noble metal catalyst while maintaining its pH at 5-9, thereby catalytically hydrogenating the folic acid of dihydrofolic acid into 4,5,6,7-tetrahydrofolic acid.
    Type: Grant
    Filed: October 10, 1985
    Date of Patent: May 12, 1987
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Yutaka Hirai, Masaaki Torisu, Eri Nagayoshi
  • DNA coding for a signal amino acid sequence and DNA containing the same
    Patent number: 4663294
    Abstract: This invention relates to DNA consisting of a DNA base sequence coding for the signal amino acid sequence:______________________________________ Met Phe Ala Lys Arg Phe Lys Thr Ser Leu Leu Pro Leu Phe Ala Gly Phe Leu Leu Leu Phe Tyr Leu Val Leu Ala Gly Pro Ala Ala Ala Ser Ala Glu Thr Ala Asn Lys Ser Asn Glu, ______________________________________and to DNA containing such a DNA base sequence. The DNA base sequence coding for said amino acid sequence includes, for example, ______________________________________ ATG TTT GCA AAA CGA TTC AAA ACC TCT TTA CTG CCG TTA TTC GCT GGA TTT TTA TTG CTG TTT TAT TTG GTT CTG GCA GGA CCG GCG GCT GCG AGT GCT GAA ACG GCG AAC AAA TCG AAT GAG. ______________________________________The desired products in cells can be secreted out of cells by the use of a vector containing DNA consisting of the DNA base sequence coding for said signal amino acid sequence.
    Type: Grant
    Filed: January 6, 1984
    Date of Patent: May 5, 1987
    Assignees: Kunio Yamane, The Calpis Food Industry Co., Ltd., Mitsui Toatsu Chemicals, Inc.
    Inventors: Kunio Yamane, Kazutaka Ohmura, Akira Nakayama, Yasutoshi Takeichi
  • Glass-fiber reinforced polypropylene resin composition
    Patent number: 4663369
    Abstract: A glass-fiber reinforced polypropylene composition having superior adhesion of glass fibers therein, stiffness, high-impact properties and molding properties is provided, which composition comprises a graft polypropylene resin obtained by graft-polymerizing a radically polymerizable unsaturated compound onto a crystalline polypropylene resin with an organic peroxide catalyst in a hydrocarbon solvent or a blend of the graft polypropylene with a crystalline polypropylene resin, glass fibers treated with an organic silane or titanium compound, Ca stearate and an alkaline earth metal compound, the respective quantities of the above components being specified.
    Type: Grant
    Filed: June 3, 1986
    Date of Patent: May 5, 1987
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Yoichi Kawai, Masaru Abe, Masami Maki, Koutarou Suzuki, Minoru Hoshino