Patents by Inventor Shin-ichi Kumamoto
Shin-ichi Kumamoto 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).
-
Patent number: 10428162Abstract: The present invention provides a hydrogenation catalyst, which can produce an olefin polymer having a higher molecular weight, and a process for producing an olefin polymer having a higher molecular weight, by controlling hydrogen concentration in a polymerization reaction system efficiently in polymerizing an olefin in the presence of hydrogen. There is provided a hydrogenation catalyst formed by contacting the undermentioned component (A), the undermentioned component (B), and the undermentioned component (C). There is further provided a process for producing an olefin polymer characterized by polymerizing an olefin in the presence of hydrogen, the undermentioned component (A), the undermentioned component (B), and the undermentioned component (D). Component (A): a titanocene compound; Component (B): a silicon compound represented by the undermentioned general formula [1]: Si(OR1)4 [1]; Component (C): an alkyl metal compound; Component (D): a catalyst for olefin polymerization.Type: GrantFiled: December 30, 2015Date of Patent: October 1, 2019Assignee: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Yuki Aso, Noriyuki Satou, Shin-ichi Kumamoto
-
Publication number: 20160115254Abstract: The present invention provides a hydrogenation catalyst, which can produce an olefin polymer having a higher molecular weight, and a process for producing an olefin polymer having a higher molecular weight, by controlling hydrogen concentration in a polymerization reaction system efficiently in polymerizing an olefin in the presence of hydrogen. There is provided a hydrogenation catalyst formed by contacting the undermentioned component (A), the undermentioned component (B), and the undermentioned component (C). There is further provided a process for producing an olefin polymer characterized by polymerizing an olefin in the presence of hydrogen, the undermentioned component (A), the undermentioned component (B), and the undermentioned component (D). Component (A): a titanocene compound; Component (B): a silicon compound represented by the undermentioned general formula [1]: Si(OR1)4 [1]; Component (C): an alkyl metal compound; Component (D): a catalyst for olefin polymerization.Type: ApplicationFiled: December 30, 2015Publication date: April 28, 2016Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Yuki ASO, Noriyuki SATOU, Shin-ichi KUMAMOTO
-
Patent number: 8859450Abstract: A solid catalyst component for olefin polymerization, comprising titanium atoms, magnesium atoms, halogen atoms and hydrocarbyloxy groups, wherein the following filtrate contains titanium atoms in a concentration of 0.08 mg-Ti/ml-filtrate or lower, measured according to a method comprising the steps of (1) preparing a suspension of the solid catalyst component for olefin polymerization in heptane having a concentration of 0.1 g-solid catalyst component/ml-suspension, (2) heating the suspension at 70° C. for 30 minutes under stirring, (3) filtering the suspension, thereby obtaining a filtrate, and (4) measuring a concentration of titanium atoms contained in the filtrate; and a production process of the solid catalyst component.Type: GrantFiled: October 21, 2010Date of Patent: October 14, 2014Assignee: Sumitomo Chemical Company, LimitedInventor: Shin-ichi Kumamoto
-
Publication number: 20110275765Abstract: There are provided an ethylene-propylene copolymer having the following structural characteristics, and a polypropylene resin composition comprising the above copolymer and polypropylene having a melting temperature of 160° C. or higher: (1) its propylene content is 20 to 60% by mol; (2) its product of a monomer reactivity ratio is less than 2.5; (3) its intrinsic viscosity is more than 1.0 dl/g; (4) its molecular weight distribution is more than 3; (5) its glass transition temperature is lower than ?40° C.; (6) its heat of crystallization is less than 5.0 J/g; (7) in a temperature rising elution fractionation method, its elution amount is 60% by weight or more in a temperature range of lower than 10° C., its elution amount is 3% by weight or more in a temperature range of 10° C. to lower than 55° C., and its elution amount is 5% by weight or less in a temperature range of 83° C.Type: ApplicationFiled: June 17, 2011Publication date: November 10, 2011Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Yasuki FUJIWARA, Makoto SATOH, Shinya NAKAHARA, Shin-ichi KUMAMOTO
-
Publication number: 20110165419Abstract: Provided is an ultrahigh molecular weight ethylene-?-olefin copolymer powder having an intrinsic viscosity of 5 dl/g or more, a DSC melting point of 122° C. or less, an apparent bulk density of 0.30 g/cm3 or more, and a flow-down rate of 20 g/10 seconds or more. Also, provided is an ultrahigh molecular weight ethylene-?-olefin copolymer powder having an intrinsic viscosity of 5 dl/g or more, a DSC melting point of 122° C. or less, a median diameter of 1 to 3000 ?m, and a particle size distribution parameter (SPAN) of 3 or less.Type: ApplicationFiled: March 26, 2008Publication date: July 7, 2011Inventor: Shin-ichi Kumamoto
-
Patent number: 7960486Abstract: The purpose of the present invention is provite a process for producing an olefin polymer, which can produce an olefin polymer having a higher molecular weight even in the presence of hydrogen and can obtain an olefin polymer having good powder characteristics by lowering hydrogen concentration efficiently in polymerizing an olefin in the presence of hydrogen by use of a gas phase reaction vessel. There is provided a process for producing an olefin polymer comprising the steps of: using a gas phase reaction vessel; polymerizing an olefin by use of a catalyst for olefin polymerization in the presence of hydrogen; adding a hydrogenation catalyst into the gas phase reaction vessel; and adding a polymerization activity depressant.Type: GrantFiled: August 3, 2009Date of Patent: June 14, 2011Assignee: Sumitomo Chemical Company, LimitedInventors: Yuki Aso, Noriyuki Satou, Shin-ichi Kumamoto
-
Patent number: 7897705Abstract: The purpose of the present invention is to provide a process for producing an olefin polymer, which can produce an olefin polymer having a higher molecular weight by lowering hydrogen concentration efficiently in polymerizing an olefin in the presence of hydrogen by use of a gas phase reaction vessel. There is provided a process for producing an olefin polymer comprising the steps of: using a gas phase reaction vessel; polymerizing an olefin by use of a catalyst for olefin polymerization in the presence of hydrogen; and adding a hydrogenation catalyst to a bed portion in the gas phase reaction vessel.Type: GrantFiled: August 3, 2009Date of Patent: March 1, 2011Assignee: Sumitomo Chemical Company, LimitedInventors: Yuki Aso, Noriyuki Satou, Shin-ichi Kumamoto
-
Publication number: 20110034323Abstract: A solid catalyst component for olefin polymerization, comprising titanium atoms, magnesium atoms, halogen atoms and hydrocarbyloxy groups, wherein the following filtrate contains titanium atoms in a concentration of 0.08 mg-Ti/ml-filtrate or lower, measured according to a method comprising the steps of (1) preparing a suspension of the solid catalyst component for olefin polymerization in heptane having a concentration of 0.1 g-solid catalyst component/ml-suspension, (2) heating the suspension at 70° C. for 30 minutes under stirring, (3) filtering the suspension, thereby obtaining a filtrate, and (4) measuring a concentration of titanium atoms contained in the filtrate; and a production process of the solid catalyst component.Type: ApplicationFiled: October 21, 2010Publication date: February 10, 2011Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventor: Shin-ichi KUMAMOTO
-
Patent number: 7879751Abstract: A solid catalyst component for olefin polymerization, comprising titanium atoms, magnesium atoms, halogen atoms and hydrocarbyloxy groups, wherein the following filtrate contains titanium atoms in a concentration of 0.08 mg-Ti/ml-filtrate or lower, measured according to a method comprising the steps of (1) preparing a suspension of the solid catalyst component for olefin polymerization in heptane having a concentration of 0.1 g-solid catalyst component/ml-suspension, (2) heating the suspension at 70° C. for 30 minutes under stirring, (3) filtering the suspension, thereby obtaining a filtrate, and (4) measuring a concentration of titanium atoms contained in the filtrate; and a production process of the solid catalyst component.Type: GrantFiled: December 9, 2008Date of Patent: February 1, 2011Assignee: Sumitomo Chemical Company, LimitedInventor: Shin-ichi Kumamoto
-
Patent number: 7799866Abstract: The method for producing a propylene-ethylene block copolymer in accordance with the present invention has: a first polymerization process which is performed using two or more polymerization tanks connected in series and in which a solid catalyst or a prepolymerized catalyst containing a solid catalyst, and propylene are continuously supplied to a first polymerization tank; and a second polymerization process in which propylene, ethylene, and polypropylene particles continuously extracted from the last polymerization tank of the first polymerization process are supplied to a polymerization tank to produce a propylene-ethylene block copolymer, wherein the average retention time of the polypropylene particles in each polymerization tank of the first polymerization process is 0.1 to 1.5 h and the sum total of average retention times of polypropylene particles in the polymerization tanks of the first polymerization process is 1.5 to 3.0 h.Type: GrantFiled: December 22, 2008Date of Patent: September 21, 2010Assignee: Sumitomo Chemical Company, LimitedInventors: Shin-ichi Kumamoto, Noriyuki Satou, Masaki Endo
-
Patent number: 7732540Abstract: A process for producing an olefin copolymerization catalyst, comprising the step of contacting, with one another, (A) a solid catalyst component containing a titanium atom, a magnesium atom and a halogen atom, (B) an organoaluminum compound and/or organoaluminumoxy compound, and (C) a nitrogen-containing aromatic heterocyclic compound, whose one or more carbon atoms adjacent to its nitrogen atom are linked to an electron-withdrawing group, or a group containing an electron-withdrawing group; and a process for producing an olefin copolymer using the an olefin copolymerization catalyst.Type: GrantFiled: November 26, 2007Date of Patent: June 8, 2010Assignee: Sumitomo Chemical Company, LimitedInventors: Shinya Nakahara, Shin-ichi Kumamoto
-
Publication number: 20100040953Abstract: Provided is a porous film formed from a polyolefin-based resin containing an ethylene-?-olefin copolymer including a structural unit derived from ethylene and a structural unit derived from one or more kinds of monomers selected from ?-olefins having 4 to 10 carbon atoms, wherein a shutdown temperature is 125° C. or lower.Type: ApplicationFiled: September 25, 2007Publication date: February 18, 2010Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Atsuhiro Takata, Ryuma Kuroda, Shin-ichi Kumamoto
-
Publication number: 20100036076Abstract: The purpose of the present invention is provite a process for producing an olefin polymer, which can produce an olefin polymer having a higher molecular weight even in the presence of hydrogen and can obtain an olefin polymer having good powder characteristics by lowering hydrogen concentration efficiently in polymerizing an olefin in the presence of hydrogen by use of a gas phase reaction vessel. There is provided a process for producing an olefin polymer comprising the steps of: using a gas phase reaction vessel; polymerizing an olefin by use of a catalyst for olefin polymerization in the presence of hydrogen; adding a hydrogenation catalyst into the gas phase reaction vessel; and adding a polymerization activity depressant.Type: ApplicationFiled: August 3, 2009Publication date: February 11, 2010Applicant: Sumitomo Chemical Company, LimitedInventors: Yuki Aso, Noriyuki Satou, Shin-ichi Kumamoto
-
Publication number: 20100036070Abstract: The purpose of the present invention is to provide a process for producing an olefin polymer, which can produce an olefin polymer having a higher molecular weight by lowering hydrogen concentration efficiently in polymerizing an olefin in the presence of hydrogen by use of a gas phase reaction vessel. There is provided a process for producing an olefin polymer comprising the steps of: using a gas phase reaction vessel; polymerizing an olefin by use of a catalyst for olefin polymerization in the presence of hydrogen; and adding a hydrogenation catalyst to a bed portion in the gas phase reaction vessel.Type: ApplicationFiled: August 3, 2009Publication date: February 11, 2010Applicant: Sumitomo Chemical Company, LimitedInventors: Yuki Aso, Noriyuki Satou, Shin-ichi Kumamoto
-
Publication number: 20100036068Abstract: The purpose of the present invention is to provide a hydrogenation catalyst, which can produce an olefin polymer having a higher molecular weight, and a process for producing an olefin polymer so that an olefin polymer having a higher molecular weight can be produced, by controlling hydrogen concentration in a polymerization reaction system efficiently in polymerizing an olefin in the presence of hydrogen. There is provided a hydrogenation catalyst formed by contacting the undermentioned component (A), the undermentioned component (B), and the undermentioned component (C). There is further provided a process for producing an olefin polymer characterized by polymerizing an olefin in the presence of hydrogen, the undermentioned component (A), the undermentioned component (B), and the undermentioned component (D).Type: ApplicationFiled: August 3, 2009Publication date: February 11, 2010Applicant: Sumitomo Chemical Company, LimitedInventors: Yuki Aso, Noriyuki Satou, Shin-ichi Kumamoto
-
Publication number: 20100015515Abstract: Provided is a laminated porous film formed by laminating a heat-resistant resin layer on a porous film made from a polyolefin-based resin containing an ethylene-?-olefin copolymer including a structural unit derived from ethylene and a structural unit derived from one or more kinds of monomers selected from ?-olefins having 4 to 10 carbon atoms, wherein a shutdown temperature is 125° C. or lower and a thermal film breakage temperature is 155° C. or higher.Type: ApplicationFiled: September 25, 2007Publication date: January 21, 2010Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Atsuhiro Takata, Ryuma Kuroda, Shin-ichi Kumamoto
-
Publication number: 20090326157Abstract: There are provided an ethylene-propylene copolymer having the following structural characteristics, and a polypropylene resin composition comprising the above copolymer and polypropylene having a melting temperature of 160° C. or higher: (1) its propylene content is 20 to 60% by mol; (2) its product of a monomer reactivity ratio is less than 2.5; (3) its intrinsic viscosity is more than 1.0 dl/g; (4) its molecular weight distribution is more than 3; (5) its glass transition temperature is lower than ?40° C.; (6) its heat of crystallization is less than 5.0 J/g; (7) in a temperature rising elution fractionation method, its elution amount is 60% by weight or more in a temperature range of lower than 10° C., its elution amount is 3% by weight or more in a temperature range of 10° C. to lower than 55° C., and its elution amount is 5% by weight or less in a temperature range of 83° C.Type: ApplicationFiled: December 14, 2007Publication date: December 31, 2009Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Yasuki Fujiwara, Makoto Satoh, Shinya Nakahara, Shin-ichi Kumamoto
-
Patent number: 7605215Abstract: A process for producing an olefin copolymerization catalyst, comprising the step of contacting, with one another, (A) a solid catalyst component containing a titanium atom, a magnesium atom and a halogen atom, (B) an organoaluminum compound and/or organoaluminumoxy compound, and (C) a nitrogen-containing aromatic heterocyclic compound, whose one or more carbon atoms adjacent to its nitrogen atom are linked to an electron-donating group, or a group containing an electron-donating group; and a process for producing an olefin copolymer using the an olefin copolymerization catalyst.Type: GrantFiled: November 26, 2007Date of Patent: October 20, 2009Assignee: Sumitomo Chemical Company, LimitedInventors: Shinya Nakahara, Shin-ichi Kumamoto
-
Publication number: 20090171019Abstract: The method for producing a propylene-ethylene block copolymer in accordance with the present invention has: a first polymerization process which is performed using two or more polymerization tanks connected in series and in which a solid catalyst or a prepolymerized catalyst containing a solid catalyst, and propylene are continuously supplied to a first polymerization tank; and a second polymerization process in which propylene, ethylene, and polypropylene particles continuously extracted from the last polymerization tank of the first polymerization process are supplied to a polymerization tank to produce a propylene-ethylene block copolymer, wherein the average retention time of the polypropylene particles in each polymerization tank of the first polymerization process is 0.1 to 1.5 h and the sum total of average retention times of polypropylene particles in the polymerization tanks of the first polymerization process is 1.5 to 3.0 h.Type: ApplicationFiled: December 22, 2008Publication date: July 2, 2009Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Shin-ichi KUMAMOTO, Noriyuki Satou, Masaki Endo
-
Publication number: 20090171045Abstract: A solid catalyst component for olefin polymerization, comprising titanium atoms, magnesium atoms, halogen atoms and hydrocarbyloxy groups, wherein the following filtrate contains titanium atoms in a concentration of 0.08 mg-Ti/ml-filtrate or lower, measured according to a method comprising the steps of (1) preparing a suspension of the solid catalyst component for olefin polymerization in heptane having a concentration of 0.1 g-solid catalyst component/ml-suspension, (2) heating the suspension at 70° C. for 30 minutes under stirring, (3) filtering the suspension, thereby obtaining a filtrate, and (4) measuring a concentration of titanium atoms contained in the filtrate; and a production process of the solid catalyst component.Type: ApplicationFiled: December 9, 2008Publication date: July 2, 2009Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventor: Shin-ichi KUMAMOTO