Patents by Inventor Mituji Miyoshi
Mituji Miyoshi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 4652616Abstract: A chlorinated ethylene copolymer resin having a chlorine content of 5-50% by weight obtained by chlorinating an ethylene copolymer resin by the aqueous suspension method at a temperature of 100.degree. C. or higher in at least one chlorination stage, said copolymer resin being obtained by copolymerizing ethylene and as at least one comonomer 0.02-2.0 mol % of a nonconjugated diene using a polymerization catalyst comprising a solid catalytic component containing at least magnesium and titanium and an organic aluminum compound and having a maximum peak temperature according to the differential scanning calorimetry (DSC) of 100.degree. C. or higher.Type: GrantFiled: April 3, 1985Date of Patent: March 24, 1987Assignees: Nippon Petrochemicals Co. Ltd., Osaka Soda Co.Inventors: Takeshi Kamiya, Kazuo Matsuura, Mituji Miyoshi, Kozo Misumi, Seiji Kadomatsu, Shinji Nose
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Patent number: 4619981Abstract: Provided is an olefin polymerization catalyst comprising the combination of:[I] a solid catalyst component comprising a solid material obtained by contacting the following components (1) to (4) and a titanium compound (5) supported on said solid material:(1) a magnesium halide,(2) a compound represented by the general formula ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 are each a hydrocarbon radical having 1 to 24 carbon atoms, alkoxy, hydrogen, or halogen, R.sup.4 is a hydrocarbon radical having 1 to 24 carbon atoms and n is 1.ltoreq.n.ltoreq.30,(3) a compound represented by the general formula ##STR2## wherein R.sup.5 is hydrogen, halogen, or a hydrocarbon radical having 1 to 24 carbon atoms, R6 is a hydrocarbon radical having 1 to 24 carbon atoms, and r, p and q are integers selected from the following ranges: 1.ltoreq.r.ltoreq.3, 0.ltoreq.p<6, 0.ltoreq.q<6, provided 1.ltoreq.r+p+q<6, and(4) a compound represented by the general formula R.sup.7 -O-R.sup.8 wherein R.sup.7 and R.sup.Type: GrantFiled: August 12, 1985Date of Patent: October 28, 1986Assignee: Nippon Oil Company, LimitedInventors: Yoshio Tajima, Yoshiharu Iwasaki, Kiyoshi Kawabe, Wataru Uchida, Shoji Sugita, Kazuo Matsuura, Mituji Miyoshi
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Patent number: 4587039Abstract: Provided is an electrically-conductive resin composition comprising an ethylene/.alpha.-olefin copolymer and carbon black, said ethylene/.alpha.-olefin copolymer having the following properties (i)-(iv) and being prepared by copolymerizing ethylene with an .alpha.-olefin having 3 to 12 carbon atoms in the presence of a catalyst comprising a solid catalyst component and an organoaluminum compound, said solid catalyst component containing at least magnesium and titanium:(i) Melt index: 0.01-100 g/10 min(ii) Density: 0.860-0.930 g/cm.sup.3(iii) Maximum peak temperature (Tm) according to Differential Scanning Calorimetry (DSC): not lower than 100.degree. C.(iv) Percent insoluble in boiling n-hexane: not less than 10 wt. %.Type: GrantFiled: August 6, 1984Date of Patent: May 6, 1986Assignee: Nippon Oil Company, LimitedInventors: Noboru Yamaoka, Seiju Kezuka, Moriya Iida, Mituji Miyoshi, Kazuo Matsuura
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Patent number: 4587318Abstract: Provided is an ethylene copolymer composition for rotational molding, comprising a copolymer of a predominant ethylene and 0.02 to 1 mole % of a non-conjugated diene represented by the following formula (I) or (II) or a derivative thereof: ##STR1## wherein R.sub.1 is an alkylene group having one or two carbon atoms and R.sub.2 is hydrogen or an alkyl group having one or two carbon atoms, and an organic peroxide, said copolymer having a melt index of 2 to 50 g/10 min, a density of 0.930 to 0.970 g/cm.sup.3 and a maximum peak temperature (Tm) measured according to Differential Scanning Calorimetry (DSC) of not lower than 100.degree. C.Type: GrantFiled: January 24, 1985Date of Patent: May 6, 1986Assignee: Nippon Petrochemicals Company, LimitedInventors: Takashi Inoue, Mituji Miyoshi, Kazuo Matsuura, Kaoru Yamamoto
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Patent number: 4537938Abstract: Provided is an olefin-polymerization catalyst comprising the combination of the following components [I] and [II]:[I] a solid component obtained by intercontacting and reacting the following components (1) through (4):(1) a compound obtained by treating an oxide of an element of Groups II-IV in the Periodic Table with a compound represented by the general formula R.sup.1.sub.m Si(OR.sup.2).sub.n.sup.X.sub.4-m-n wherein R.sup.1 and R.sup.2 are each a hydrocarbon radical having 1 to 24 carbon atoms, a hydrocarbon radical containing oxygen, sulfur or nitrogen, or hydrogen, X is a halogen atom, m is 0.ltoreq.m<4 and n is 0.ltoreq.n.ltoreq.4, provided 0.ltoreq.m+n.ltoreq.4,(2) a reaction product obtained by the reaction of a magnesium halide and a compound represented by the general formula Me(OR.sup.3).sub.n.sup.X.sub.z-n wherein Me is an element of Groups I-VIII in the Periodic Table, with the limitation that silicon, titanium and vanadium are excluded, R.sup.Type: GrantFiled: March 21, 1984Date of Patent: August 27, 1985Assignee: Nippon Oil Company, LimitedInventors: Kazuo Matsuura, Yutaka Shikatani, Hirofumi Kamiishi, Nobuyuki Kuroda, Mituji Miyoshi
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Patent number: 4525548Abstract: Provided is a method for vapor phase polymerization of olefins. An olefin gas is fed into a horizontal cylindrical vessel having a lower curved surface corresponding to 30 to 180 degrees of the circumference of the vessel and extending substantially the length of the vessel formed by a perforated plate having a multiplicity of holes spaced at intervals in the range of from 0.5 to 50 mm, through said plate from an olefin feed chamber mounted below and covering the plate. A polymer catalyst is fed into the horizontal cylindrical vessel through a polymerization catalyst inlet port located in a portion of the vessel other than the lower curved surface formed by the perforated plate. The olefin is reacted in the presence of a catalyst with agitation to form polymer. Unreacted olefin is removed through a discharge port located in a portion of the vessel other than the lower curved surface formed by the perforated plate.Type: GrantFiled: August 9, 1982Date of Patent: June 25, 1985Assignee: Nippon Oil Company LimitedInventors: Kunimichi Kubo, Mamoru Yoshikawa, Motokazu Watanabe, Yasunosuke Miyazaki, Mituji Miyoshi
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Patent number: 4525555Abstract: Provided is a process for preparing a polyolefin, characterized by polymerizing at least one .alpha.-olefin in the presence of a catalyst which comprises the combination of:[I] a solid catalyst component comprising a solid substance obtained by contacting the following components (1) through (3) with one another and (4) a titanium compound supported on said solid substance:(1) a magnesium halide,(2) a compound represented by the general formula ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 are each a hydrocarbon radical having 1 to 24 carbon atoms, an alkoxy group, hydrogen, or a halogen atom, R.sup.4 is a hydrocarbon radical having 1 to 24 carbon atoms and n is 1.ltoreq.n.ltoreq.30, and(3) at least one compound selected from the group consisting of:(a) compounds represented by the general formula ##STR2## wherein R is hydrogen, a halogen atom, or a hydrocarbon radical having 1 to 24 carbon atoms, and r, p and q are integers satisfying the following conditions:1.ltoreq.r.ltoreq.3, 0.ltoreq.p<6, 0.ltoreq.Type: GrantFiled: December 15, 1983Date of Patent: June 25, 1985Assignee: Nippon Oil Company, LimitedInventors: Yoshio Tajima, Mituji Miyoshi, Shoji Sugita, Kiyoshi Kawabe, Kazuo Matsuura
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Patent number: 4495334Abstract: Provided is a polymer composition having a melt index of 0.01 to 5.0 and a density of 0.870 to 0.940 prepared by blending 30 to 80 parts by weight of an ethylene/.alpha.-olefin copolymer having an intrinsic viscosity determined in decalin at 135.degree. C. of 1.7 to 10 dl/g and a density not higher than 0.945 which copolymer is obtained by copolymerizing ethylene with an .alpha.-olefin of C.sub.3 to C.sub.12, with 70 to 20 parts by weight of a high-pressure process polyethylene having an intrinsic viscosity determined in decalin at 135.degree. C. of not higher than 1.3 dl/g and a density of 0.915 to 0.935.Type: GrantFiled: January 4, 1983Date of Patent: January 22, 1985Assignee: Nippon Oil Company Ltd.Inventors: Kazuo Matsuura, Noboru Yamaoka, Shinichi Yanahashi, Katumi Usui, Mituji Miyoshi
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Patent number: 4451688Abstract: Olefins are polymerized in the presence of a catalyst which comprises the combination of:[I] a solid substance obtained by the reaction of at least the following two components:(i) a magnesium compound represented by the general formula R.sup.1.sub.m (OR.sup.2).sub.n MgX.sub.2-m-n wherein R.sup.1 and R.sup.2 are each a hydrocarbon radical having 1 to 24 carbon atoms, X is a halogen atom, m is 0.ltoreq.m.ltoreq.2 and n is 0.ltoreq.n.ltoreq.2, provided 0.ltoreq.m+n.ltoreq.2, and(ii) a titanium compound and/or a vanadium compound;[II] a silicon compound represented by general formula R.sup.1 mSi(OR.sup.2).sub.n X.sub.4-m-n wherein R.sup.1 and R.sup.2 are each hydrocarbon radical having 1 to 24 carbon atoms, X is a halogen atom, m is 0.ltoreq.m<4 and n is 0<n.ltoreq.4, provided 0 m+n 4;[III] an organometallic compound, where said catalyst comprises a product obtained by pre-reacting said silicon compound (II) and said organometallic compound (III).Type: GrantFiled: September 1, 1982Date of Patent: May 29, 1984Assignee: Nippon Oil Company, LimitedInventors: Nobuyuki Kuroda, Toru Nakamura, Yutaka Shikatani, Kazuo Matsuura, Mituji Miyoshi
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Patent number: 4450243Abstract: Provided is a carrier for an olefin polymerization catalyst which carrier comprises a substance obtained by adding a liquid organic compound not dissolving a magnesium halide into a liquid medium having dissolved therein a substance which contains the magnesium halide as at least one component, the liquid medium further containing an oxide of Group II-IV metal or metals in the Periodic Table, followed by cooling to a temperature not higher than 0.degree. C. and subsequent heat treatment at a temperature in the range of 40.degree. to 200.degree. C.Type: GrantFiled: February 2, 1983Date of Patent: May 22, 1984Assignee: Nippon Oil Company, LimitedInventors: Kazuo Matsuura, Nobuyuki Kuroda, Takeichi Shiraishi, Yutaka Shikatani, Mituji Miyoshi
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Patent number: 4438073Abstract: A horizontal agitation bed type vapor phase polymerization apparatus for olefins provided on its lower curved surface with plural cells each having an opening facing on the polymerization reaction system and further having small holes formed in its side wall portion for feeding a starting olefin gas.Type: GrantFiled: October 28, 1981Date of Patent: March 20, 1984Assignee: Nippon Oil Company, Ltd.Inventors: Kunimichi Kubo, Yasunosuke Miyazaki, Mamoru Yoshikawa, Mituji Miyoshi
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Patent number: 4415718Abstract: Using a catalyst comprising (1) a solid substance which contains magnesium and titanium, (2) an organometallic compound and (3) an electron donor, there are polymerized ethylene, propylene and 1-butene to obtain a soft or semi-hard terpolymer of low crystallinity containing 75.2 to 91.5 mol % propylene, 7.5 to 14.9 mol % ethylene and 1.0 to 9.9 mol % 1-butene.Type: GrantFiled: February 16, 1982Date of Patent: November 15, 1983Assignee: Nippon Oil Company, Ltd.Inventors: Mituji Miyoshi, Kazuo Matsuura, Yoshio Tajima
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Patent number: 4414369Abstract: Polyolefins having a wide distribution of molecular weights are prepared in a plural stage process, by initially polymerizing the olefins in the presence of a solvent, hydrogen and a highly active Ziegler type catalyst under pressure, and beneath a gas phase containing an inert gas, to form in the first stage a polymer having a relatively high molecular weight. The polymerization reaction mixture from the first stage is continuously flowed to a second stage reactor. The second stage reactor is maintained at a relatively lower pressure, such that the flow is driven by the higher pressure in the first stage. The second stage is agitated and the polymerization reaction mixture is maintained beneath an atmosphere containing olefins and hydrogen gas. Polymers of relatively low molecular weight are formed in the second stage. The product continuously removed from the second stage contains a polymer having a wide distribution of molecular weight.Type: GrantFiled: April 7, 1980Date of Patent: November 8, 1983Assignee: Nippon Oil Company, LimitedInventors: Nobuyuki Kuroda, Tatsuo Horie, Kazuo Matsuura, Kunimichi Kubo, Mituji Miyoshi
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Patent number: 4413097Abstract: Provided is a polymer composition having a melt index of 0.01 to 5.0 and a density of 0.870 to 0.940 prepared by blending 30 to 80 parts by weight of an ethylene/propylene copolymer having an intrinsic viscosity determined in decalin at 135.degree. C. of 1.7 to 10 dl/g and a density not higher than 0.945 which copolymer is obtained by copolymerizing ethylene with propylene, with 70 to 20 parts by weight of a high-pressure process polyethylene having an intrinsic viscosity determined in decalin at 135.degree. C. of not higher than 0.7 dl/g and a density of 0.915 to 0.935.Type: GrantFiled: April 20, 1982Date of Patent: November 1, 1983Assignee: Nippon Oil Company, Ltd.Inventors: Kazuo Matsuura, Noboru Yamaoka, Shinichi Yanahashi, Katumi Usui, Mituji Miyoshi
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Patent number: 4412042Abstract: The present invention provides an improved process for preparing a polyolefin cross-linked by silane linkage by contacting a polyolefin modified with silane with water in the presence of a silanol condensation catalyst, the improvement comprising said polyolefin modified with silane being a reaction product produced by reacting an ethylene/.alpha.-olefin copolymer having a density of from 0.850 to 0.910 with a silane compound in the presence of a free radical generating agent, said ethylene/.alpha.-olefin copolymer being prepared by copolymerizing ethylene with an .alpha.-olefin having 3 to 12 carbon atoms in a vapor phase with substantially no solvent present and in the presence of a catalyst comprising an organoaluminum compound and a solid substance containing magnesium, and a metal selected from the group consisting of titanium, vanadium and mixture thereof.Type: GrantFiled: March 8, 1982Date of Patent: October 25, 1983Assignee: Nippon Oil Company, LimitedInventors: Kazuo Matsuura, Noboru Yamaoka, Mituji Miyoshi
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Patent number: 4410670Abstract: This invention provides a process for preparing polyolefins using a new catalyst. According to this invention, .alpha.-olefins can be polymerized or copolymerized to have good stereoregularity and at a high activity by the use of such new catalyst. The new catalyst used in this invention consists of [A] a solid component obtained by contacting (1) a magnesium oxide, (2) an aluminum trihalide, (3) a hydroxy compound represented by the general formula ROH wherein R is an organic radical having 1 to 20 carbon atoms and (4) a titanium halide and/or an addition product of a titanium halide and an aromatic carboxylic acid ester, and [B] an organometallic compound and/or an addition product of an organometallic compound and an aromatic carboxylic acid ester; or it consists of the solid component of the above [A], the organometallic compound and/or the addition product of an organometallic compound and an aromatic carboxylic acid ester of the above [B], and [C] an aromatic carboxylic acid ester.Type: GrantFiled: June 6, 1979Date of Patent: October 18, 1983Assignee: Nippon Oil Company, LimitedInventors: Yoshio Tajima, Kazuo Matsuura, Nobuyuki Kuroda, Mituji Miyoshi
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Patent number: 4404342Abstract: According to this invention, there is provided a process for preparing a low-crystalline soft or semi-hard copolymer, characterized in that 90 to 98 mole % of propylene, 0.2 to 9 mole % of ethylene and 0.2 to 9 mole % of a straight-chained (.alpha.-olefin having not less than four carbon atoms are copolymerized using a catalyst, said catalyst comprising (1) a solid substance containing magnesium and titanium, (2) an organometallic compound and (3) an electron donor.Type: GrantFiled: August 31, 1981Date of Patent: September 13, 1983Assignee: Nippon Oil Company, Ltd.Inventors: Mituji Miyoshi, Kazuo Matsuura, Yoshio Tajima
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Patent number: 4396534Abstract: In an olefin polymerizing catalyst comprising a solid catalyst component and an organometallic compound, there is used, as the solid catalyst component, a substance obtained by contacting and reacting the following compounds with one another:(1) a silicon oxide and/or an aluminum oxide,(2) a magnesium halide,(3) a compound represented by the general formula Me(OR).sub.n X.sub.z--n wherein Me is an element belonging to Groups I through IV in the Periodic Table, z is the valence of the element Me, n is 0<n.ltoreq.z, X is a halogen atom and R is a hydrocarbon radical having 1 to 20 carbon atoms,(4) a titanium compound and/or a vanadium compound, and(5) a compound represented by the general formula R".sub.n Si(OR').sub.m X.sub.4-m-n wherein R' and R" are each a hydrocarbon radical having 1 to 24 carbon atoms, X is a halogen atom, n is 0.ltoreq.n<4 and m is 0<m.ltoreq.4, with the limitation that 0<m+n.ltoreq.4, and/or a polysiloxane.Type: GrantFiled: March 22, 1982Date of Patent: August 2, 1983Assignee: Nippon Oil Company, LimitedInventors: Kazuo Matsuura, Takeichi Shiraishi, Etsuo Kawamata, Mitsuo Okamoto, Nobuyuki Kuroda, Mituji Miyoshi
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Patent number: 4372919Abstract: A horizontal agitation bed type vapor phase polymerization apparatus for olefins, having a lower curved surface constructed by a perforated plate so as to allow a olefin gas to be fed uniformly throughout the reaction system through the said perforated plate.Type: GrantFiled: March 10, 1981Date of Patent: February 8, 1983Assignee: Nippon Oil Company, LimitedInventors: Kunimichi Kubo, Mamoru Yoshikawa, Motokazu Watanabe, Yasunosuke Miyazaki, Mituji Miyoshi
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Patent number: 4371679Abstract: This invention provides a process for preparing polyolefins by polymerizing or copolymerizing olefins using as the catalyst a titanium compound-containing solid component and an organometal compound, said solid component comprising a substance obtained by copulverizing (1) magnesium halide and/or manganese halide, (2) an organic halide compound, (3) a chain or cyclic silicone compound with a recurring structural unit represented by the general formula ##STR1## wherein R' and R" respectively represent a hydrogen, alkyl, aryl, alkoxy or hydroxyl group and (4) tetravalent and/or trivalent titanium compound(s).Type: GrantFiled: January 28, 1981Date of Patent: February 1, 1983Assignee: Nippon Oil Company, Ltd.Inventors: Nobuyuki Kuroda, Akira Sano, Toru Nakamura, Kazuo Matsuura, Mituji Miyoshi