Patents Assigned to Mitsui
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Patent number: 4530621Abstract: A shield driving apparatus and process for enlarging the periphery of a predetermined region of an existing tunnel lined with a primary shield segment assembly wherein some segments of such a region of the primary shield segment assembly that correspond to the predetermined region to be enlarged are removed in series along the axial direction of the existing tunnel. The exposed ground resulting from the removal of the primary shield segment assembly is excavated to form a cavity therein. A circumferentially driving shield machine is positioned in the cavity and is mounted to bridge between the two guide rings provided at both end portions of the predetermined region and along the periphery of the existing tunnel.Type: GrantFiled: December 7, 1983Date of Patent: July 23, 1985Assignee: Mitsui Kensetsu Kabushiki KaishaInventors: Toshio Furuta, Nobuhiko Kawamoto, Akira Honma
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Patent number: 4529680Abstract: A magnetic toner for pressure fixation containing at least a resin and a magnetic powder as the main components, where the resin is a polymer essentially, containing methyl-1-pentene as the main component and having a softening point of at least 80.degree. C. and a compression yield strength of not more than 150 kg/cm.sup.2, has a good fixability under a low pressure and a good preservability at a high temperature.Type: GrantFiled: December 21, 1983Date of Patent: July 16, 1985Assignees: Hitachi Metals, Ltd., Mitsui Petrochemical Industries, Ltd.Inventors: Masumi Asanae, Koji Noguchi, Hideyuki Itoi, Katsumi Funakoshi
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Patent number: 4529684Abstract: A composition obtained by incorporating a benzenedithiol nickel complex in a liquid formulation containing a solvent and, as a binder, an organic polymer or containing a solvent, organic color-producing substance, acidic substance and binder suitable for producing a laser beam recording/reading means having an absorption band in the region of 800-950 nm.Type: GrantFiled: November 15, 1984Date of Patent: July 16, 1985Assignee: Mitsui Toatsu Chemicals, IncorporatedInventors: Katsuyoshi Sasagawa, Eiichi Noda, Masao Imai
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Patent number: 4529530Abstract: Triurea grease compositions having excellent oil separation, shear stability, oxidation stability and structural stability of a thickening agent at a high temperature, which contains a triurea compound ##STR1## wherein R.sub.1 is a monovalent aliphatic hydrocarbon radical having 12-24 carbon atoms, R.sub.2 is a divalent triazine derivative radical, R.sub.3 is a divalent aromatic hydrocarbon radical having 6-15 carbon atoms or the derivative radical thereof, and R.sub.4 is at least one of monovalent aliphatic hydrocarbon radicals having 2-24 carbon atoms, derivative radicals thereof, monovalent aromatic hydrocarbon radicals having 6-10 carbon atoms and derivative radicals thereof, as a thickening agent in a usual lubricating base oil.Type: GrantFiled: September 19, 1983Date of Patent: July 16, 1985Assignees: Chuo Yuka Co., Ltd., Mitsui Toatsu Chemicals, Inc., Nippon Steel CorporationInventors: Shirow Shimizu, Shuichi Takahashi, Kazuo Kato, Koichi Takeuchi, Kozo Iwasaki, Motofumi Kurahashi, Tetsuo Ichimaru
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Patent number: 4526707Abstract: A semiconducting composition comprising(A) a random copolymer of propylene and an alpha-olefin having at least 4 carbon atoms as main constituents, which contains 50 to 87 mole % of the propylene units,(B) fine particles of carbon black, and as an optional component,(C) at least one random copolymer selected from the group consisting of a random copolymer of ethylene and a vinyl ester having 4 to 5 carbon atoms as main constituents, which contains at least about 5.4 mole % of the vinyl ester units, and a random copolymer of ethylene and an unsaturated carboxylic acid ester having 4 to 8 carbon atoms as main constituents, which contains at least 3 mole % of the unsaturated carboxylic acid ester units.The semiconducting composition or its crosslinked product is useful as an outside semiconducting layer in a power cable composed at least of a central conductor, a crosslinked polyethylene insulating layer surrounding the conductor and an outside semiconducting layer surrounding the insulating layer.Type: GrantFiled: December 19, 1983Date of Patent: July 2, 1985Assignee: Du Pont-Mitsui Polychemicals Co., Ltd.Inventors: Yoshikazu Kutsuwa, Kouji Kitahara, Toshiyuki Ishii
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Patent number: 4526656Abstract: Disclosed herein is a stripping tower adapted to remove unreacted vinyl chloride from a suspension or emulsion of a vinyl chloride resin after its polymerization reaction. The tower is a packed tower filled with a packing such as Tellerette packing. A condenser is provided in direct attachment to a top portion of the packed tower so that steam, which is discharged together with stripped monomeric vinyl chloride gas, is condensed in the condenser, separated from the monomeric vinyl chloride gas and then recirculated to the packed tower. Use of a packed tower as a stripping tower and steam as a stripping medium enjoys good removal efficiency of monomeric vinyl chloride but is accompanied by occurrence of a large volume of foams of a polyvinyl chloride slurry in the tower. Foams of the slurry eventually overflow from the top of the tower and do not permit any further continuation of the operation.Type: GrantFiled: September 27, 1983Date of Patent: July 2, 1985Assignee: Mitsui Toatsu Chemicals, IncorporatedInventors: Hiroshi Okada, Hideyuki Itagaki, Takehiko Kano, Seiichi Masuko
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Patent number: 4526920Abstract: In a curable coating composition comprising an acryloyl or methacryloyl cyanurate or isocyanurate compound, an acrylic or methacrylic ester compound and a polymerization initiator capable of curing said components; the improvement wherein said composition is composed of(A) 100 parts by weight of an acryloyl- or methacryloyl-oxyalkyl cyanurate or isocyanurate compound of the following formula (I) or (I)' ##STR1## wherein X.sup.1, X.sup.2, X.sup.3, R.sup.1, R.sup.2 and R.sup.3 are defined in claim 1(B) more than 0 to 1,000 parts by weight of a component selected from the group consisting of (b.sub.1) a polyacrylate or polymethacrylate with a number average molecular weight of about 240 to about 3,000 of an oxy- or polyoxy-alkanepolyol containing 1 or more ether linkages and 3 or more hydroxyl groups per molecule, and (b.sub.2) a poly(meth)acrylate of an alkanepolyol having 4 or more hydroxyl groups per molecule.(C) 0.Type: GrantFiled: August 2, 1983Date of Patent: July 2, 1985Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Takeshi Sakashita, Hajime Inagaki, Akira Todo, Takayuki Nakano
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Patent number: 4525469Abstract: A catalyst composition for the polymerization or copolymerization of olefins composed of(A) a titanium component (a-1) or (a-2),(a-1) a highly active titanium component containing titanium, magnesium and halogen as essential ingredients, or(a-2) a highly active titanium catalyst component obtained by treating component (a-1) with an organic compound containing active hydrogen bonded to oxygen, and(B) an organoaluminum compound component, wherein(i) when component (A) is the component (a-1), component (b) is an organoaluminum compound component obtained by treating a halogen-containing organoaluminum compound having a halogen/Al atomic ratio of at least 1 but less than 2 with a compound selected from the group consisting of water and organic compounds having active hydrogen bonded to oxygen, and(ii) when component (A) is the component (a-2), the component (B) is a halogen-containing organoaluminum compound having a halogen/Al atomic ratio of at least 1 but less than 2, and the ratio of the amount (x) of the orType: GrantFiled: October 25, 1983Date of Patent: June 25, 1985Assignee: Mitsui Petrochemical Industries Ltd.Inventors: Takashi Ueda, Norio Kashiwa
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Patent number: 4525547Abstract: A process for producing an ethylene copolymer which comprises polymerizing a predominant amount of ethylene and a minor amount of an alpha-olefin having 4 to 10 carbon atoms in the gaseous phase in the presence of a catalyst composed of (A) a transition metal catalyst component and (B) an organometallic compound of a metal of Groups I to III of the periodic table; characterized in that the copolymerization is carried out under the following conditions (i) and (ii),(i) at least 1 mole, per mole of ethylene, of a gaseous saturated hydrocarbon having 3 to 6 carbon atoms is caused to be present in the gaseous phase copolymerization system, and(ii) the gaseous mixture containing the unreacted olefin which has been discharged from the gaseous phase copolymerization system is cooled to a temperature at which the mixture is not liquefied, and the cooled gaseous mixture is recycled to the gaseous phase copolymerization system.Type: GrantFiled: April 2, 1984Date of Patent: June 25, 1985Assignee: Mitsui Petrochemical Industries Ltd.Inventors: Akifumi Kato, Junichi Yoshida, Ryoichi Yamamoto
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Patent number: 4524147Abstract: Disclosed are uracil derivatives having the general formula ##STR1## where R represents a hydrogen atom or an alkyl radical having 1 to 4 carbon atoms. Also disclosed are a process for preparing these compounds and pharmaceutical compositions having immunomodulatory activity which comprise these compounds as the active ingredient.Type: GrantFiled: November 16, 1982Date of Patent: June 18, 1985Assignee: Mitsui Toatsu Chemicals, IncorporatedInventors: Isao Sakano, Tatsuro Yokoyama, Seitaro Kajiya, Yutaka Okazaki, Hiroshi Tokuda, Hiroshi Kawazura, Mikio Kumakura, Akira Awaya
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Patent number: 4523011Abstract: 6-(Substituted phenyl)-4,5-dihydro-3(2H)-pyridazinone compounds possessing strong platelet aggregation inhibiting activity and blood pressure depressing activity, having the general formula: ##STR1## wherein R.sup.1 is hydrogen or lower alkyl; R.sup.2 is hydrogen, lower alkyl, lower alkylthio or the grouping R.sup.5 --NH-- where R.sup.5 is lower alkyl; R.sup.3 is phenyl, pyridyl, benzyl, lower alkyl or a substituted phenyl group carrying at any desired position on the benzene ring thereof the grouping: ##STR2## where R.sup.1 has the same meaning as given above; R.sup.4 is hydrogen or halogen; n is 0 or 1; and when both R.sup.2 and R.sup.3 are lower alkyl groups, R.sup.2 and R.sup.3 may be combined together with the bridging member ##STR3## between them to form the structure: ##STR4## where m is 2 or 3, as well as physiologically acceptable acid-addition salts thereof, and processes for preparing them.Type: GrantFiled: March 28, 1984Date of Patent: June 11, 1985Assignee: Mitsui Toatsu Kagaku Kabushiki KaishaInventors: Tsutomu Katakami, Nobuyuki Fukazawa, Hajime Iizuka, Takashi Nishina, Joji Kamiya, Yasuhito Tanaka, Takuo Nakano
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Patent number: 4522930Abstract: Catalysts for the polymerization of alpha-olefins, which comprise the product of the reaction between:(a) a metalorganic 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 1-14 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: GrantFiled: February 10, 1983Date of Patent: June 11, 1985Assignees: Montedison S.p.A., Mitsui Petrochemical Ind.Inventors: Enrico Albizzati, Sandro Parodi, Pier C. Barbe
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Patent number: 4522993Abstract: Disclosed herein are a resin for high-refractivity lenses, formed by copolymerizing at least one nucleus-halogenated benzene dicarboxylate represented by the following general formula (I): ##STR1## wherein X means a chlorine or bromine atom, n is 2 or 4, m stands for 0 or 1 and R denotes a hydrogen atom or a methyl group with at least one unifunctional monomer having a refractive index of at least 1.55 as a homopolymer, capable of undergoing a radical polymerization and containing an aromatic ring as well as high-refractivity lenses made of such a resin. The lens-making resin according to this invention features a high refractive index, excellent processability such as superb grinding processability and high impact resistance, outstanding miscibility between the unifunctional monomer and bifunctional monomer upon copolymerization thereof, and minimized polymerization strain.Type: GrantFiled: March 2, 1984Date of Patent: June 11, 1985Assignee: Mitsui Toatsu Chemicals, IncorporatedInventors: Katsuyoshi Sasagawa, Akio Hyugaji, Masao Imai
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Patent number: 4521415Abstract: 6-(Substituted phenyl)-4,5-dihydro-3(2H)-pyridazinone compounds possessing strong platelet aggregation inhibiting activity and blood pressure depressing activity, having the general formula: ##STR1## wherein R.sup.1 is hydrogen or lower alkyl; R.sup.2 is hydrogen, lower alkyl, lower alkylthio or the grouping R.sup.5 --NH-- where R.sup.5 is lower alkyl; R.sup.3 is phenyl, pyridyl, benzyl, lower alkyl or a substituted phenyl group carrying at any desired position on the benzene ring thereof the grouping: ##STR2## where R.sup.1 has the same meaning as given above; R.sup.4 is hydrogen or halogen; n is 0 or 1; and when both R.sup.2 and R.sup.3 are lower alkyl groups, R.sup.2 and R.sup.3 may be combined together with the bridging member ##STR3## where m is 2 or 3, as well as physiologically acceptable acid-addition salts thereof, and processes for preparing them.Type: GrantFiled: December 28, 1982Date of Patent: June 4, 1985Assignee: Mitsui Toatsu Kagaku Kabushiki KaishaInventors: Tsutomu Katakami, Nobuyuki Fukazawa, Hajime Iizuka, Takashi Nishina, Joji Kamiya, Yasuhito Tanaka, Takuo Nakano
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Patent number: 4521378Abstract: A fluid bed reactor system for olefin polymerization composed of a cylindrical reaction vessel equipped with a distribution plate and an agitator, characterized in that the distribution plate satisfies the following conditions,(i) each of many passage holes provided in the distribution plate for passage of the fluidizing gas medium is covered with a cap having an opening,(ii) the opening in said cap is provided only on one side of the cap, and the direction (A) of the opening is not opposite to the direction (B) of the rotational flow,(iii) the direction (A) of the opening varies with the distance (d) from the center (X) of the plate to the center (Y) of the hole,(iv) the opening direction (A) of a cap or caps at a hole or holes whose distance (d) is minimum is directed nearer to the center (X) than is the tangential direction of a circle having the center (X) as a center and the distance (d.sub.min.Type: GrantFiled: March 9, 1983Date of Patent: June 4, 1985Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Mitsunori Ichimura, Ryoichi Yamamoto, Katsutoshi Horimoto
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Patent number: 4519728Abstract: A floating offshore structure which is moored at a fixed position on the sea by means of mooring hawsers and anchors connected to the ends thereof respectively for conducting a submarine excavating operation from a deck of the structure. The structure includes a moorage hull part provided with a vertical through-hole formed therein for receiving an excavating drill pipe and the mooring hawsers and a movable hull part connected to the moorage hull part so as to be rotatable within a horizontal plane. The movable hull part is constituted as a hull defining the outer wall of the floating offshore structure and connected with the moorage hull part by inserting it into a moorage hull part receiving hole formed at a position closer to the bow thereof.Type: GrantFiled: March 24, 1983Date of Patent: May 28, 1985Assignee: Mitsui Engineering and Shipbuilding Company, Ltd.Inventors: Masanao Oshima, Hitoshi Narita, Nobuyoshi Yashima, Hiroshi Tabuchi
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Patent number: 4520126Abstract: A catalyst composition consisting essentially of a molded article comprising an anhydrous inorganic potassium compound and metallic sodium and metallic potassium dispersed on the surface of the molded article, said molded article further containing 0.7 to 3% by weight, based on the weight of the inorganic potassium compound, of elemental carbon, the atomic ratio of metallic sodium to metallic potassium being in the range of from 20:80 to 90:10. This catalyst composition is useful for the dimerization or codimerization of alpha-olefins.Type: GrantFiled: December 28, 1982Date of Patent: May 28, 1985Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Keiji Kawamoto, Keigo Kato, Takahiro Aida
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Patent number: 4518181Abstract: A power-driven automobile door locking device of the type wherein a latch engages and arrests a striker on the door. The device has a lock lever capable of assuming a locking position in which the latch is not releasable and an unlocking position in which the latch is releasable. The lock lever is moved by a motor between the locking and unlocking positions. The motor drives a rotary disk in rotation, which disk has an essentially spiral cam groove in the surface thereof. A cam follower engages with the spiral cam groove, and, as the disk is rotated, the cam follower is caused to move radially of the disk, the radial movement of the cam follower is transmitted to the lock lever through any suitable mechanism. The spiral groove operates to transmit an amplified force to the cam follower. The rotary disk may be replaced by a rotary cylinder having a cam groove in its cylindrical surface.Type: GrantFiled: May 24, 1983Date of Patent: May 21, 1985Assignee: Mitsui Kinzoku Kogyo Kabushiki KaishaInventor: Shinjiro Yamada
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Patent number: 4516403Abstract: A feed water supply pump and a second control valve are provided in a water supply line system and a first control valve is provided at a second steam line. Further, a third control valve is provided at a hot water supply line. In this manner, the terminal temperature difference between the circulating water and the exhaust gas at the inlet and outlet of a preheating portion of an exhaust gas economizer are so controlled as to become equal. In addition, steam discharged from an exhaust outlet of a multi-pressure steam turbine is turned to water by means of a condenser and then, the condensed water is returned to a drain tank while withdrawing and collecting heat energy respectively in a lubricating oil cooler, a fresh water cooler and an air cooler of an internal combustion engine.Type: GrantFiled: April 20, 1984Date of Patent: May 14, 1985Assignee: Mitsui Engineering & Shipbuilding Co., Ltd.Inventor: Yoshiharu Tanaka
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Patent number: 4517387Abstract: A process for continuously producing 2,2-bis(4-hydroxyphenyl) propane having a high quality from a reaction of phenol and acetone in the presence of a hydrochloric acid containing catalyst comprising the steps of:(A) carrying out the reaction by continuously charging additional phenol, the below-mentioned circulating phenol, additional acetone, additional hydrogen chloride or hydrochloric acid, the below-mentioned circulating oily mother liquor, and the below-mentioned aqueous mother liquid into a reactor to form a reaction mixture slurry comprising the crude phenol adduct of 2,2-bis(4-hydroxyphenyl) propane in the form of crystal and two liquid phase reaction mother liquors of an oily mother liquor and an aqueous mother liquor;(B) separating the reaction mixture slurry into the crude phenol adduct of 2,2-bis(4-hydroxyphenyl) propane and the two liquid phase mother liquors after discharging the reaction mixture slurry from the reactor;(C) separating the two liquid phase mother liquors obtained in the above-meType: GrantFiled: September 26, 1983Date of Patent: May 14, 1985Assignees: Mitsui Petrochemical Industries, Ltd., Honshu Chemical Ind. Co. Ltd.Inventors: Fujihisa Matsunaga, Tadahiko Nishimura, Etsuo Miyake, Kiyotaka Banba