Patents by Inventor Yuki Iseki
Yuki Iseki 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: 8039554Abstract: An ethylene-?-olefin copolymer having monomer units derived from ethylene and monomer units derived from an ?-olefin of 3 to 20 carbon atoms, a melt flow rate (MFR) of 0.01 to 4 g/10 minutes, a density of 890 to 970 kg/m3, an activation energy of flow of 50 kJ/mol or more and a molecular weight distribution measured by gel permeation chromatography of 3 or more, wherein a characteristic relaxation time (?) determined by a melt viscoelasticity measurement or an external haze ratio (EHR) satisfies a relationship of the following formula (1) or (2), respectively: 3×MFR?0.75+1.1>?>1.3×MFR?0.5+1.4??(1) EHR??15×log MFR+0.Type: GrantFiled: September 28, 2006Date of Patent: October 18, 2011Assignee: Sumitomo Chemical Company, LimitedInventors: Yuki Iseki, Katsuhiro Yamada, Yasutoyo Kawashima, Yoshinobu Nozue
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Patent number: 7871557Abstract: The object is to provide a method for producing a film excellent in a quality of odorless or free from deteriorating taste of food contained in a package of the extruded molded article by using an ethylene-?-olefin copolymer excellent in extrusion molding processability. This object is achieved by a method for producing an extruded molded article comprising a step of extruding a copolymer of ethylene and ?-olefin of from 3 to 20 carbon atoms having an activation energy for melt flow of not less than 50 kJ/mol under one of the following conditions: (a) a temperature of melted resin at die gap of T-die is not more than 200° C., (b) a temperature of melted resin at die gap of tubular tie is not more than 170° C.Type: GrantFiled: September 23, 2004Date of Patent: January 18, 2011Assignee: Sumitomo Chemical Company, Ltd.Inventors: Yuki Iseki, Kenzo Chikanari, Yasuro Suzuki
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Patent number: 7557172Abstract: An ethylene-?-olefin copolymer comprising a repeating unit derived from ethylene and a repeating unit derived from an ?-olefin having 3 to 20 carbon atoms, wherein a melt flow rate (MFR) is 0.01 to 100 g/10 minutes, a density is 860 to 970 kg/m3, a molecular weight distribution (Mw/Mn) is 2 to 8, and a ratio (?*0.1/?*100) of a dynamic complex viscosity (?*0.1) at a temperature of 190° C. and an angular frequency of 0.1 rad/s, to a dynamic complex viscosity (?*100) at a temperature of 190° C. and an angular frequency of 100 rad/s is 15 to 100 is excellent in balance between mechanical strength and processability.Type: GrantFiled: March 23, 2006Date of Patent: July 7, 2009Assignee: Sumitomo Chemical Company, LimitedInventors: Yasutoyo Kawashima, Yuki Iseki
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Patent number: 7485687Abstract: An ethylene-?-olefin copolymer containing monomer units derived from ethylene and monomer units of an ?-olefin having 3 to 20 carbon atoms and having a melt flow rate of from 0.01 to 100 g/10 min, an activation energy of flow of 50 kJ/mol or more, a molecular weight distribution measured by a gel permeation chromatography of 3 or more and minute defects of 2000/m2 or less in number, a process for producing the copolymer, and a molding of the copolymer.Type: GrantFiled: September 28, 2006Date of Patent: February 3, 2009Assignee: Sumitomo Chemical Company, LimitedInventors: Yuki Iseki, Tomoaki Goto, Yasutoyo Kawashima
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Patent number: 7473747Abstract: An ethylene-?-olefin copolymer containing monomer units derived from ethylene and monomer units derived from an ?-olefin having 4 to 20 carbon atoms, and having a density of 890 to 970 kg/m3, an activation energy of flow of 50 kJ/mol or more, a molecular weight distribution of 3 or more determined by a gel permeation chromatography, and the number of inflection points of 3 or less on a melting curve obtained by a differential scanning calorimetry within a temperatures ranges of from 25°C. to an end point of melting.Type: GrantFiled: September 28, 2006Date of Patent: January 6, 2009Assignee: Sumitomo Chemical Company, LimitedInventors: Yuki Iseki, Katsuhiro Yamada, Yasutoyo Kawashima, Yoshinobu Nozue
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Patent number: 7339019Abstract: A copolymer having monomer units derived from ethylene and monomer units derived from an ?-olefin of 3 to 20 carbon atoms, a density of 906 to 970 kg/m3 and an activation energy of flow of 50 kJ/mol or more, and satisfying specific relations among a melt complex viscosity, a melt flow rate and a characteristic relaxation time.Type: GrantFiled: October 24, 2005Date of Patent: March 4, 2008Assignee: Sumitomo Chemical Company, Ltd.Inventors: Yuki Iseki, Katsuhiro Yamada, Tatsuhiro Nagamatsu
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Patent number: 7335715Abstract: An ethylene-?-olefin copolymer having monomer units derived from ethylene and monomer units derived from an ?-olefin of 3 to 20 carbon atoms, a density of 906 to 970 kg/m3, an activation energy of flow of 50 kJ/mol or more and a heat quantity of fusion of a cold xylene soluble part of 30 J/g or more, and satisfying specific relations among a rate of the cold xylene soluble part in the copolymer, the density, a melt flow rate and a characteristic relaxation time.Type: GrantFiled: October 24, 2005Date of Patent: February 26, 2008Assignee: Sumitomo Chemical Company, Ltd.Inventors: Yuki Iseki, Katsuhiro Yamada, Tatsuhiro Nagamatsu
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Publication number: 20070100105Abstract: An ethylene-?-olefin copolymer containing monomer units derived from ethylene and monomer units of an ?-olefin having 3 to 20 carbon atoms and having a melt flow rate of from 0.01 to 100 g/10 min, an activation energy of flow of 50 kJ/mol or more, a molecular weight distribution measured by a gel permeation chromatography of 3 or more and minute defects of 2000/m2 or less in number, a process for producing the copolymer, and a molding of the copolymer.Type: ApplicationFiled: September 28, 2006Publication date: May 3, 2007Applicant: Sumitomo Chemical Company, LimitedInventors: Yuki Iseki, Tomoaki Goto, Yasutoyo Kawashima
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Publication number: 20070100106Abstract: An ethylene-?-olefin copolymer containing monomer units derived from ethylene and monomer units derived from an ?-olefin having 4 to 20 carbon atoms, and having a density of 890 to 970 kg/m3, an activation energy of flow of 50 kJ/mol or more, a molecular weight distribution of 3 or more determined by a gel permeation chromatography, and the number of inflection points of 3 or less on a melting curve obtained by a differential scanning calorimetry within a temperatures range of from 25° C. to an end point of melting.Type: ApplicationFiled: September 28, 2006Publication date: May 3, 2007Applicant: Sumitomo Chemical Company, LimitedInventors: Yuki Iseki, Katsuhiro Yamada, Yasutoyo Kawashima, Yoshinobu Nozue
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Publication number: 20070093627Abstract: An ethylene-?-olefin copolymer having monomer units derived from ethylene and monomer units derived from an ?-olefin of 3 to 20 carbon atoms, a melt flow rate (MFR) of 0.01 to 4 g/10 minutes, a density of 890 to 970 kg/m3, an activation energy of flow of 50 kJ/mol or more and a molecular weight distribution measured by gel permeation chromatography of 3 or more, wherein a characteristic relaxation time (?) determined by a melt viscoelasticity measurement or an external haze ratio (EHR) satisfies a relationship of the following formula (1) or (2), respectively: 3×MFR?0.75+1.1>?>1.3×MFR?0.5+1.4 ??(1) EHR??15×log MFR+0.Type: ApplicationFiled: September 28, 2006Publication date: April 26, 2007Applicant: Sumitomo Chemical Company, LimitedInventors: Yuki Iseki, Katsuhiro Yamada, Yasutoyo Kawashima, Yoshinobu Nozue
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Patent number: 7141639Abstract: An object of the present invention is to provide an ethylene-?-olefin copolymer excellent in extrusion molding processability and in the balance between the appearance and impact strength. This object is achieved by a copolymer of ethylene and ?-olefin of from 4 to 20 carbon atoms having melt flow rate (MFR; unit is g/10 minutes), melt tension at 190° C. (MT; unit is cN), intrinsic viscosity ([?]; unit is dl/g), the chain length A and characteristic relaxation time at 190° C. (?; unit is sec) which satisfy the specific relations.Type: GrantFiled: August 28, 2003Date of Patent: November 28, 2006Assignee: Sumitomo Chemical Company, LimitedInventors: Yuki Iseki, Yasuro Suzuki, Tadahiro Mitsuno
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Patent number: 7125946Abstract: The invention provides an ethylene-?-olefin copolymer which is superior in extrusion molding processability. The present invention is to provide a copolymer of ethylene and ?-olefin of from 4 to 20 carbon atoms, having melt flow rate of from 1 to 100 g/10 min, an activation energy for melt flow of 60 kJ/mol or more, melt tension at 190° C. (MT), intrinsic viscosity ([?]) and a chain length A which satisfy the formula (1) to (3), wherein the chain length A is a chain length at peak position of a logarithm normal distribution curve of a component having the highest molecular weight among logarithm normal distribution curves obtained by dividing a chain length distribution curve obtained by gel permeation chromatography measurement into at least two logarithm normal distribution curves.Type: GrantFiled: March 26, 2004Date of Patent: October 24, 2006Assignee: Sumitomo Chemical Company, LimitedInventors: Yuki Iseki, Yasuro Suzuki, Tadahiro Mitsuno
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Publication number: 20060217510Abstract: An ethylene-?-olefin copolymer comprising a repeating unit derived from ethylene and a repeating unit derived from an ?-olefin having 3 to 20 carbon atoms, wherein a melt flow rate (MFR) is 0.01 to 100 g/10 minutes, a density is 860 to 970 kg/m3, a molecular weight distribution (Mw/Mn) is 2 to 8, and a ratio (?*0.1/?*100) of a dynamic complex viscosity (?*0.1) at a temperature of 190° C. and an angular frequency of 0.1 rad/s, to a dynamic complex viscosity (?*100) at a temperature of 190° C. and an angular frequency of 100 rad/s is 15 to 100 is excellent in balance between mechanical strength and processability.Type: ApplicationFiled: March 23, 2006Publication date: September 28, 2006Applicant: Sumitomo Chemical Company, LimitedInventors: Yasutoyo Kawashima, Yuki Iseki
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Publication number: 20060089476Abstract: An ethylene-?-olefin copolymer having monomer units derived from ethylene and monomer units derived from an ?-olefin of 3 to 20 carbon atoms, a density of 906 to 970 kg/m3, an activation energy of flow of 50 kJ/mol or more and a heat quantity of fusion of a cold xylene soluble part of 30 J/g or more, and satisfying specific relations among a rate of the cold xylene soluble part in the copolymer, the density, a melt flow rate and a characteristic relaxation time.Type: ApplicationFiled: October 24, 2005Publication date: April 27, 2006Applicant: Sumitomo Chemical Company, LimitedInventors: Yuki Iseki, Katsuhiro Yamada, Tatsuhiro Nagamatsu
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Publication number: 20060089475Abstract: A copolymer having monomer units derived from ethylene and monomer units derived from an ?-olefin of 3 to 20 carbon atoms, a density of 906 to 970 kg/m3 and an activation energy of flow of 50 kJ/mol or more, and satisfying specific relations among a melt complex viscosity, a melt flow rate and a characteristic relaxation time.Type: ApplicationFiled: October 24, 2005Publication date: April 27, 2006Applicant: Sumitomo Chemical Company, LimitedInventors: Yuki Iseki, Katsuhiro Yamada, Tatsuhiro Nagamatsu
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Publication number: 20050192417Abstract: An object of the present invention is to provide an ethylene-?-olefin copolymer excellent in extrusion molding processability and in the balance between the appearance and impact strength. This object is achieved by a copolymer of ethylene and ?-olefin of from 4 to 20 carbon atoms having melt flow rate (MFR; unit is g/10 minutes), melt tension at 190° C. (MT; unit is cN), intrinsic viscosity ([?]; unit is dl/g), the chain length A and characteristic relaxation time at 190° C. (?; unit is sec) which satisfy the specific relations.Type: ApplicationFiled: August 28, 2003Publication date: September 1, 2005Applicant: Sumitomo Chemical Company, LimitedInventors: Yuki Iseki, Yasuro Suzuki, Tadahiro Mitsuno
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Publication number: 20050098927Abstract: The object is to provide a method for producing a film excellent in a quality of odorless or free from deteriorating taste of food contained in a package of the extruded molded article by using an ethylene-?-olefin copolymer excellent in extrusion molding processability. This object is achieved by a method for producing an extruded molded article comprising a step of extruding a copolymer of ethylene and ?-olefin of from 3 to 20 carbon atoms having an activation energy for melt flow of not less than 50 kJ/mol under one of the following conditions: (a) a temperature of melted resin at die gap of T-die is not more than 200° C., (b) a temperature of melted resin at die gap of tubular tie is not more than 170° C.Type: ApplicationFiled: September 23, 2004Publication date: May 12, 2005Applicant: Sumitomo Chemical Company, LimitedInventors: Yuki Iseki, Kenzo Chikanari, Yasuro Suzuki
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Patent number: 6867277Abstract: An ethylene-based polymer resin which is obtained by copolymerizing ethylene with an ?-olefin having 5 to 20 carbon atoms, and has a melt flow rate (MFR) measured at 190° C. under a load of 21.18 N according to JIS K7210-1995, of not less than 0.01 g/10 min. and less than 1 g/10 min., wherein the melt flow rate and a melt tension(MT) at 190° C. (unit: cN) of the resin satisfy a relation of the following expression (1) and an intrinsic viscosity [?] (unit: dL/g) and the melt flow rate of the resin satisfy a relation of the following expression (2): 2×MFR?0.59<MT<3.6×MFR?0.66??(1) 1.02×MFR?0.094<[?]<1.50×MFR?0.156??(2).Type: GrantFiled: March 27, 2003Date of Patent: March 15, 2005Assignee: Sumitomo Chemical Company, LimitedInventor: Yuki Iseki
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Publication number: 20040249101Abstract: The invention provides an ethylene-&agr;-olefin copolymer which is superior in extrusion molding processability. The present invention is to provide a copolymer of ethylene and &agr;-olefin of from 4 to 20 carbon atoms, having melt flow rate of from 1 to 100 g/10 min, an activation energy for melt flow of 60 kJ/mol or more, melt tension at 190° C. (MT), intrinsic viscosity ([&eegr;]) and a chain length A which satisfy the formula (1) to (3), wherein the chain length A is a chain length at peak position of a logarithm normal distribution curve of a component having the highest molecular weight among logarithm normal distribution curves obtained by dividing a chain length distribution curve obtained by gel permeation chromatography measurement into at least two logarithm normal distribution curves.Type: ApplicationFiled: March 26, 2004Publication date: December 9, 2004Applicant: Sumitomo Chemical Company, LimitedInventors: Yuki Iseki, Yasuro Suzuki, Tadahiro Mitsuno
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Publication number: 20040030082Abstract: An ethylene-based polymer resin which is obtained by copolymerizing ethylene with an &agr;-olefin having 5 to 20 carbon atoms, and has a melt flow rate (MFR) measured at 190° C. under a load of 21.18N according to JIS K7210-1995, of not more than 0.01 g/10 min. and less than 1 g/10 min., wherein the melt flow rate and a melt tension (MT) at 190° C.Type: ApplicationFiled: March 27, 2003Publication date: February 12, 2004Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventor: Yuki Iseki