Patents by Inventor Hisakatsu Hama
Hisakatsu Hama 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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Publication number: 20120309894Abstract: A method for producing a rubber composition, the method comprising a step of producing a pre-kneaded rubber composition by kneading a butadiene-based rubber and 1 to 20 parts by weight of a silane coupling agent per 100 parts by weight of the butadiene-based rubber and a step of kneading the pre-kneaded rubber composition and 30 to 200 parts by weight of a silica per 100 parts by weight of the butadiene-based rubber used for producing the pre-kneaded rubber composition.Type: ApplicationFiled: May 30, 2012Publication date: December 6, 2012Applicant: Sumitomo Chemical Company, LimitedInventors: Takuya SUDO, Hisakatsu HAMA
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Publication number: 20120238674Abstract: Disclosed is a resin composition including a thermoplastic resin (A), carbon fibers (B), graphite particles (C), an absorbent (D) selected from the group consisting of calcium hydroxide, zeolite, and hydrotalcite, and an antioxidant (E) or a combination of an antioxidant (E) and a compound (F) selected from a compound group consisting of compounds represented by CnHn+2 (OH)n wherein n represents an integer of 4 or greater, alkoxy forms derived from compounds represented by the following formula (2), trehalose, sucrose, lactose, maltose, melicitose, stachyose, curdlan, glycogen, glucose, and fructose. A lighting fixture component made of this resin composition is also disclosed.Type: ApplicationFiled: March 8, 2012Publication date: September 20, 2012Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Kenji ATARASHI, Hisakatsu HAMA
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Patent number: 8188189Abstract: A resin composition, comprising (a) 50 to 99% by weight of a crystalline polypropylene resin, and (b) 1 to 50% by weight of a propylene copolymer comprising 50 to 85% by mol of a propylene unit and 15 to 50% by mol of a C8-12 ?-olefin unit, the propylene copolymer having (1) no meting point in a range of ?100 to 200° C., or a melting point of 50° C. or lower in that temperature range, (2) an isotactic selectivity of 90% or higher, (3) a molecular weight distribution of 3 or smaller, and (4) an intrinsic viscosity of 0.1 to 10 dl/g.Type: GrantFiled: April 14, 2009Date of Patent: May 29, 2012Assignee: Sumitomo Chemical Company, LimitedInventors: Kenji Sogoh, Katsuhiro Yamada, Hisakatsu Hama, Masaaki Tsutsubuchi
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Publication number: 20120041140Abstract: Disclosed are a modified conjugated diene-based polymer capable of providing a polymer composition improved in tan ? balance, a polymer composition containing the modified conjugated diene-based polymer and silica, and a process for producing the modified conjugated diene-based polymer. The modified conjugated diene-based polymer is obtained by melt-kneading a conjugated diene-based polymer and 0.01 to 2 parts by weight of a Bunte salt per 100 parts by weight of the conjugated diene-based polymer, in the presence of water whose amount is from 0.1 to 1,000 parts by weight per one part by weight of the Bunte salt.Type: ApplicationFiled: August 9, 2011Publication date: February 16, 2012Inventor: Hisakatsu HAMA
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Publication number: 20110245382Abstract: A method for producing a thermoplastic polymer material is provided, the method including the steps of supplying component (A) below to a vent type extruder that includes a starting material supply opening, a liquid inlet, and a vent via the starting material supply opening of the extruder, supplying component (B) below to the extruder via the liquid inlet of the extruder, melting and kneading component (A) and component (B) within the extruder, and degassing a volatile component via the vent and extruding through a die a thermoplastic polymer material comprising a thermoplastic polymer of component (A) and at least one compound selected from compound group S of component (B). (A) A polymer composition that includes a thermoplastic polymer and an organic solvent and/or a monomer. (B) A solution of at least one compound selected from compound group S consisting of trehalose, sucrose, lactose, maltose, etc.Type: ApplicationFiled: March 23, 2011Publication date: October 6, 2011Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventor: Hisakatsu HAMA
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Publication number: 20110245398Abstract: A method for producing a conjugated diene polymer composition is provided that comprises the step of kneading a conjugated diene polymer, silica and a silane coupling agent using a kneading machine in the presence of 1 to 50 parts by weight of water and/or carbon dioxide relative to 100 parts by weight of the conjugated diene polymer.Type: ApplicationFiled: March 22, 2011Publication date: October 6, 2011Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Hisakatsu HAMA, Mana ITO
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Publication number: 20110046312Abstract: A resin composition, comprising (a) 50 to 99% by weight of a crystalline polypropylene resin, and (b) 1 to 50% by weight of a propylene copolymer comprising 50 to 85% by mol of a propylene unit and 15 to 50% by mol of a C8-12 ?-olefin unit, the propylene copolymer having (1) no meting point in a range of ?100 to 200° C., or a melting point of 50° C. or lower in that temperature range, (2) an isotactic selectivity of 90% or higher, (3) a molecular weight distribution of 3 or smaller, and (4) an intrinsic viscosity of 0.1 to 10 dl/g.Type: ApplicationFiled: April 14, 2009Publication date: February 24, 2011Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Kenji Sogoh, Katsuhiro Yamada, Hisakatsu Hama, Masaaki Tsutsubuchi
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Patent number: 7807760Abstract: Disclosed is a process for producing an ethylene-?-olefin copolymer excellent in balancing between strength and elongation by continuous multi-step polymerization. The process comprises continuously polymerizing ethylene and ?-olefin in a solvent in the presence of an olefin polymerization catalyst using a polymerization reaction apparatus comprising two or more tanks of polymerization reactors connected in series, said process including a first polymerization step of producing in one tank of polymerization reactor a polymer component under the polymerization condition of a flow state being 1.5 or more tanks in the perfect mixing cell model, and a second polymerization step of producing in one tank of polymerization reactor a polymer component under specific polymerization conditions.Type: GrantFiled: January 29, 2008Date of Patent: October 5, 2010Assignee: Sumitomo Chemical Company, LimitedInventors: Hisakatsu Hama, Jun Kawashima
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Patent number: 7504462Abstract: Disclosed is to provide a process for producing an olefin polymer by continuous polymerization according to which the transition metal compound and the co-catalyst component promptly contact after they are fed to the polymerization reaction tank. The above process for producing an olefin polymer comprises continuously polymerizing an olefinic monomer in the presence of a polymerization catalyst obtained by contact treatment of a transition metal compound and a co-catalyst component in a polymerization reaction tank in which an agitation shaft having an agitating blade is suspended in the central part of the tank.Type: GrantFiled: January 29, 2008Date of Patent: March 17, 2009Assignee: Sumitomo Cheimcal Company, LimitedInventor: Hisakatsu Hama
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Patent number: 7482409Abstract: The object of the present invention is to provide a process for producing an ethylene-?-olefin-polyene copolymer by continuous multistage polymerization which can give an ethylene-?-olefin-polyene copolymer excellent in a form retention property during extrusion. The process for producing an ethylene-?-olefin-polyene copolymer comprises continuously polymerizing ethylene, ?-olefin, and the following polyene (A) and polyene (B) in a solvent in the presence of an olefin polymerization catalyst using a polymerization reaction apparatus comprising two tanks of polymerization reactors connected in series, wherein the polymerization is carried out under specific conditions: polyene (A): at least one polyene selected from norbornadienes and vinylnorbornenes, polyene (B): polyene other than the polyene (A).Type: GrantFiled: January 29, 2008Date of Patent: January 27, 2009Assignee: Sumitomo Chemical Company, LimitedInventors: Hisakatsu Hama, Hidetake Hozumi
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Publication number: 20080214746Abstract: Disclosed is a process for producing an ethylene-?-olefin copolymer excellent in balancing between strength and elongation by continuous multi-step polymerization. The process comprises continuously polymerizing ethylene and ?-olefin in a solvent in the presence of an olefin polymerization catalyst using a polymerization reaction apparatus comprising two or more tanks of polymerization reactors connected in series, said process including a first polymerization step of producing in one tank of polymerization reactor a polymer component under the polymerization condition of a flow state being 1.5 or more tanks in the perfect mixing cell model, and a second polymerization step of producing in one tank of polymerization reactor a polymer component under specific polymerization conditions.Type: ApplicationFiled: January 29, 2008Publication date: September 4, 2008Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Hisakatsu Hama, Jun Kawashima
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Publication number: 20080207852Abstract: The object of the present invention is to provide a process for producing an ethylene-?-olefin copolymer by continuous multistage polymerization which can give an ethylene-?-olefin copolymer excellent in a form retention property during extrusion. The process for producing an ethylene-?-olefin copolymer comprises continuously polymerizing ethylene and ?-olefin in a solvent in the presence of an olefin polymerization catalyst using a polymerization reaction apparatus comprising two tanks of polymerization reactors connected in series, wherein the polymerization is carried out under the following polymerization conditions etc.: a ratio (?1/?2) of average residence time in the first tank (?1, unit: hr) to average residence time in the second tank (?2, unit: hr): from 1.2 to 10, and a value G of the following formula: from 0 to 0.Type: ApplicationFiled: January 29, 2008Publication date: August 28, 2008Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Hisakatsu HAMA, Hidetake Hozumi
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Publication number: 20080182947Abstract: The object of the present invention is to provide a process for producing an ethylene-?-olefin-polyene copolymer by continuous multistage polymerization which can give an ethylene-?-olefin-polyene copolymer excellent in a form retention property during extrusion. The process for producing an ethylene-?-olefin-polyene copolymer comprises continuously polymerizing ethylene, ?-olefin, and the following polyene (A) and polyene (B) in a solvent in the presence of an olefin polymerization catalyst using a polymerization reaction apparatus comprising two tanks of polymerization reactors connected in series, wherein the polymerization is carried out under specific conditions: polyene (A): at least one polyene selected from norbornadienes and vinylnorbornenes, polyene (B): polyene other than the polyene (A).Type: ApplicationFiled: January 29, 2008Publication date: July 31, 2008Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Hisakatsu HAMA, Hidetake Hozumi
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Publication number: 20080182949Abstract: Disclosed is to provide a process for producing an olefin polymer by continuous polymerization according to which the transition metal compound and the co-catalyst component promptly contact after they are fed to the polymerization reaction tank. The above process for producing an olefin polymer comprises continuously polymerizing an olefinic monomer in the presence of a polymerization catalyst obtained by contact treatment of a transition metal compound and a co-catalyst component in a polymerization reaction tank in which an agitation shaft having an agitating blade is suspended in the central part of the tank.Type: ApplicationFiled: January 29, 2008Publication date: July 31, 2008Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventor: Hisakatsu HAMA