Patents by Inventor Yasushi Seta
Yasushi Seta 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: 8652618Abstract: Purpose: The present invention provides a multi-layer film comprising a polyolefin film, an aluminum foil and a polyamide layer which are laminated sequentially, wherein the aluminum foil is adhered directly to the polyolefin film without any anchor coat agent or adhesive and the multi-layer film is excellent in adhesion strength between the polyolefin film and the aluminum foil and in low-temperature resistance.Type: GrantFiled: August 14, 2009Date of Patent: February 18, 2014Assignee: Riken Technos CorporationInventor: Yasushi Seta
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Publication number: 20100047597Abstract: Purpose: The present invention provides a multi-layer film comprising a polyolefin film, an aluminum foil and a polyamide layer which are laminated sequentially, wherein the aluminum foil is adhered directly to the polyolefin film without any anchor coat agent or adhesive and the multi-layer film is excellent in adhesion strength between the polyolefin film and the aluminum foil and in low-temperature resistance.Type: ApplicationFiled: August 14, 2009Publication date: February 25, 2010Applicant: RIKEN TECHNOS CORPORATIONInventor: Yasushi Seta
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Publication number: 20090215973Abstract: A propylenic polymer according to the present invention or a composition thereof have an excellent melt flowability and contains a less amount of stickiness-causing components, and also has a low modulus and is pliable, and is capable of providing a transparent molded article, thus being useful as a substitute for a pliable vinyl chloride resin. In addition, a molded article made therefrom exhibits an excellent heat seal performance at a low temperature, and is excellent in terms of transparency and rigidity. Specifically, it has an isotactic pentad fraction (mmmm), which indicates a stereoregularity, of 30 to 80%, a molecular weight distribution (Mw/Mn) of 3.5 or less and an intrinsic viscosity [?] of 0.8 to 5 dl/g.Type: ApplicationFiled: April 23, 2009Publication date: August 27, 2009Applicant: Idemitsu Kosan Co., Ltd.Inventors: Yutaka Minami, Masato Kijima, Takuji Okamoto, Yasushi Seta, Yasuhiro Mogi, Tsuyoshi Ota, Hideo Funabashi, Takashi Kashiwamura, Noriyuki Tani, Masami Kanamaru, Koji Kakigami
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Patent number: 7544758Abstract: A propylenic polymer according to the present invention or a composition thereof have an excellent melt flowability and contains a less amount of stickiness-causing components, and also has a low modulus and is pliable, and is capable of providing a transparent molded article, thus being useful as a substitute for a pliable vinyl chloride resin. In addition, a molded article made therefrom exhibits an excellent heat seal performance at a low temperature, and is excellent in terms of transparency and rigidity. Specifically, it has an isotactic pentad fraction (mmmm), which indicates a stereoregulariry, of 30 to 80%, a molecular weight distribution (Mw/Mn) of 3.5 or less and an intrinsic viscosity [?] of 0.8 to 5 dl/g.Type: GrantFiled: September 1, 2006Date of Patent: June 9, 2009Assignee: Idemitsu Kosan Co., Ltd.Inventors: Yutaka Minami, Masato Kijima, Takuji Okamoto, Yasushi Seta, Yasuhiro Mogi, Tsuyoshi Ota, Hideo Funabashi, Takashi Kashiwamura, Noriyuki Tani, Masami Kanamaru, Koji Kakigami
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Patent number: 7250211Abstract: Heat-sealing polypropylene films having specific characteristics, and being well-balanced between a tensile modulus and a heat seal temperature, less tacky, and excellent in processability, transparency and impact resistance, as well as being excellent in resistance to whitening due to peeling, softness and impact resistance. A multilayered heat-sealing polyolefin resin laminate having at least one outermost layer produced from the above heat-sealing propylene polymers exhibits excellent low-temperature heat sealability and sufficient interlaminar strength without the use of an adhesive. The heat-sealing propylene polymers are produced by polymerizing propylene or polymerizing propylene with ethylene and/or C4-C20 ?-olefin in the presence of a polymerization catalyst containing a transition metal compound represented by the following formula (I): wherein A1, A2, E1, E2, M, X, Y, q and r are as defined in the specification.Type: GrantFiled: October 24, 2000Date of Patent: July 31, 2007Assignee: Idemitsu Kosan Co., Ltd.Inventors: Yutaka Minami, Masami Kanamaru, Hideo Funabashi, Yasushi Seta, Masahiko Endoh
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Patent number: 7199202Abstract: A propylenic polymer according to the present invention or a composition thereof have an excellent melt flowability and contains a less amount of stickiness-causing components, and also has a low modulus and is pliable, and is capable of providing a transparent molded article, thus being useful as a substitute for a pliable vinyl chloride resin. In addition, a molded article made therefrom exhibits an excellent heat seal performance at a low temperature, and is excellent in terms of transparency and rigidity. Specifically, it has an isotactic pentad fraction (mmmm), which indicates a stereoregulariry, of 30 to 80%, a molecular weight distribution (Mw/Mn) of 3.5 or less and an intrinsic viscosity [?] of 0.8 to 5 dl/g.Type: GrantFiled: May 28, 2004Date of Patent: April 3, 2007Assignee: Idemitsu Kosan Co. Ltd.Inventors: Yutaka Minami, Masato Kijima, Takuji Okamoto, Yasushi Seta, Yasuhiro Mogi, Tsuyoshi Ota, Hideo Funabashi, Takashi Kashiwamura, Noriyuki Tani, Masami Kanamaru, Koji Kakigami
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Publication number: 20060293471Abstract: A propylenic polymer according to the present invention or a composition thereof have an excellent melt flowability and contains a less amount of stickiness-causing components, and also has a low modulus and is pliable, and is capable of providing a transparent molded article, thus being useful as a substitute for a pliable vinyl chloride resin. In addition, a molded article made therefrom exhibits an excellent heat seal performance at a low temperature, and is excellent in terms of transparency and rigidity. Specifically, it has an isotactic pentad fraction (mmmm), which indicates a stereoregulariry, of 30 to 80%, a molecular weight distribution (Mw/Mn) of 3.5 or less and an intrinsic viscosity [?] of 0.8 to 5 dl/g.Type: ApplicationFiled: September 1, 2006Publication date: December 28, 2006Applicant: Idemitsu Kosan Co., Ltd.Inventors: Yutaka Minami, Masato Kijima, Takuji Okamoto, Yasushi Seta, Yasuhiro Mogi, Tsuyoshi Ota, Hideo Funabashi, Takashi Kashiwamura, Noriyuki Tani, Masami Kanamaru, Koji Kakigami
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Patent number: 6906155Abstract: A propylenic polymer according to the present invention or a composition thereof have an excellent melt flowability and contains a less amount of stickiness-causing components, and also has a low modulus and is pliable, and is capable of providing a transparent molded article, thus being useful as a substitute for a pliable vinyl chloride resin. In addition, a molded article made therefrom exhibits an excellent heat seal performance at a low temperature, and is excellent in terms of transparency and rigidity. Specifically, it has an isotactic pentad fraction (mmmm), which indicates a stereoregulariry, of 30 to 80%, a molecular weight distribution (Mw/Mn) of 3.5 or less and an intrinsic viscosity [?] of 0.8 to 5 dl/g.Type: GrantFiled: June 25, 1999Date of Patent: June 14, 2005Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Yutaka Minami, Masato Kijima, Takuji Okamoto, Yasushi Seta, Yasuhiro Mogi, Tsuyoshi Ota, Hideo Funabashi, Takashi Kashiwamura, Noriyuki Tani
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Publication number: 20050043495Abstract: A propylenic polymer according to the present invention or a composition thereof have an excellent melt flowability and contains a less amount of stickiness-causing components, and also has a low modulus and is pliable, and is capable of providing a transparent molded article, thus being useful as a substitute for a pliable vinyl chloride resin. In addition, a molded article made therefrom exhibits an excellent heat seal performance at a low temperature, and is excellent in terms of transparency and rigidity. Specifically, it has an isotactic pentad fraction (mmmm), which indicates a stereoregulariry, of 30 to 80%, a molecular weight distribution (Mw/Mn) of 3.5 or less and an intrinsic viscosity [?] of 0.8 to 5 dl/g.Type: ApplicationFiled: May 28, 2004Publication date: February 24, 2005Applicant: IDEMITSU PETROCHEMICAL CO., LTD.Inventors: Yutaka Minami, Masato Kijima, Takuji Okamoto, Yasushi Seta, Yasuhiro Mogi, Tsuyoshi Ota, Hideo Funabashi, Takashi Kashiwamura, Noriyuki Tani, Masami Kanamaru, Koji Kakigami
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Patent number: 6737171Abstract: Provided are a propylenic random copolymer of propylene and ethylene satisfying the following (1) to (5), a composition comprising the copolymer, a film and a stretched film of the copolymer or its composition, and a laminate film and a stretched laminate film comprising at least one layer of the copolymer or its composition. (1) The ethylene unit content (x, wt. %) of the copolymer is from 0.2 to 10 wt. %. (2) The copolymer has a melt index (MI, g/10 min) of from 0.1 to 4 g/10 min. (3) The relation between the boiling diethyl ether extraction (E, wt. %) of the copolymer and x satisfies the following (I) or (II); E≦0.253x+1.1 (0.2≦x<6) (I) E≦2.6 (6≦x≦10) (II) (4) The relation between the melting point (Tm, ° C.Type: GrantFiled: November 22, 2002Date of Patent: May 18, 2004Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Yasushi Seta, Satoshi Nakatsuka, Michihiro Sawada, Ryoichi Tsunori
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Patent number: 6723446Abstract: The present invention provides a wrap film or shrink film formed from a resin composition containing [I] a propylene polymer in an amount of 1 to 99 mass %, and [II] an olefin-based polymer in an amount of 99 to 1 mass %, wherein [I] the propylene polymer satisfies the following requirements of: (1) a meso pentad fraction (mmmm) is 0.2 to 0.6, and (2) a racemic pentad fraction (rrrr) and (1−mmmm) satisfy the following relation: [rrrr/(1−mmmm)]≦0.1. The wrap film or shrink film exhibits excellent characteristics, and does not generate a toxic gas derived from chlorine, such as hydrogen chloride gas or dioxin, when being incinerated.Type: GrantFiled: November 5, 2002Date of Patent: April 20, 2004Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Yasushi Seta, Masahiko Endoh
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Patent number: 6649725Abstract: Disclosed are a binary random copolymer of propylene and ethylene, and a film to be formed by sheeting the copolymer. The film has good heat-sealability, high stiffness, good anti-blocking and slipping properties, and high transparency. As having excellent heat-sealability at low-temperature, the copolymer and its film are favorably used as sealant layers of laminate films.Type: GrantFiled: October 14, 1997Date of Patent: November 18, 2003Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Yasushi Seta, Satoshi Nakatsuka, Michihiro Sawada, Ryoichi Tsunori, Tokutaro Kimura, Yutaka Minami
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Publication number: 20030143415Abstract: The present invention provides a wrap film or shrink film formed from a resin composition containing [I] a propylene polymer in an amount of 1 to 99 mass %, and [II] an olefin-based polymer in an amount of 99 to 1 mass %, wherein [I] the propylene polymer satisfies the following requirements of: (1) a meso pentad fraction (mmmm) is 0.2 to 0.6, and (2) a racemic pentad fraction (rrrr) and (1−mmmm) satisfy the following relation: [rrrr/(1−mmmm)]≦0.1. The wrap film or shrink film exhibits excellent characteristics, and does not generate a toxic gas derived from chlorine, such as hydrogen chloride gas or dioxin, when being incinerated.Type: ApplicationFiled: November 5, 2002Publication date: July 31, 2003Inventors: Yasushi Seta, Masahiko Endoh
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Publication number: 20030120014Abstract: Provided are a propylenic random copolymer of propylene and ethylene satisfying the following (1) to (5), a composition comprising the copolymer, a film and a stretched film of the copolymer or its composition, and a laminate film and a stretched laminate film comprising at least one layer of the copolymer or its composition.Type: ApplicationFiled: November 22, 2002Publication date: June 26, 2003Applicant: Idemitsu Petrochemical Co., Ltd.Inventors: Yasushi Seta, Satoshi Nakatsuka, Michihiro Sawada, Ryoichi Tsunori
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Patent number: 6562886Abstract: A propylene homopolymer or a copolymer of propylene and an &agr;-olefin with at least 4 carbon atoms, which is produced through polymerization in the presence of a metallocene catalyst and which has an increased isotactic pentad fraction and a reduced molecular weight distribution; and also a propylene-based polymer composition as prepared by adding a nucleating agent to the homopolymer or the copolymer are superior to conventional polymers and polymer compositions, as they have well-balanced toughness and heat-sealability, and are not sticky, and, in addition, they have excellent anti-blocking properties. Their films especially those for wrapping and packaging edibles are tough and have excellent anti-blocking properties, and high film impact resistance. The polymer and the polymer composition have good moldability.Type: GrantFiled: April 27, 2000Date of Patent: May 13, 2003Assignee: Idemistsu Petrochemical Co., Ltd.Inventors: Yutaka Minami, Yasuhiro Mogi, Takuji Okamoto, Tsuyoshi Ota, Hideo Funabashi, Yasushi Seta
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Patent number: 6420021Abstract: Disclosed are a binary random copolymer of propylene and ethylene, and a film to be formed by sheeting the copolymer. The film has good heat-sealability, high stiffness, good anti-blocking and slipping properties, and high transparency. As having excellent heat-sealability at low-temperature, the copolymer and its film are favorably used as sealant layers of laminate films.Type: GrantFiled: November 22, 2000Date of Patent: July 16, 2002Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Yasushi Seta, Satoshi Nakatsuka, Michihiro Sawada, Ryoichi Tsunori, Tokutaro Kimura, Yutaka Minami
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Publication number: 20010053453Abstract: Disclosed are a binary random copolymer of propylene and ethylene, and a film to be formed by sheeting the copolymer. The film has good heat-sealability, high stiffness, good anti-blocking and slipping properties, and high transparency. As having excellent heat-sealability at low-temperature, the copolymer and its film are favorably used as sealant layers of laminate films.Type: ApplicationFiled: October 14, 1997Publication date: December 20, 2001Inventors: YASUSHI SETA, SATOSHI NAKATSUKA, MICHIHIRO SAWADA, RYOICHI TSUNORI, TOKUTARO KIMURA, YUTAKA MINAMI
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Patent number: 6287705Abstract: The invention provides (1) a propylene-ethylene random copolymer having specific properties, (2) a resin composition comprising a propylene-ethylene random copolymer with specific properties, and a nucleating agent, (3) a resin composition comprising a propylene-ethylene random copolymer with specific properties, and a propylene-based polymer; and their films, and multi-layered, propylene-based laminates of which the outermost layer is made of a specific propylene-based polymer. The films and the laminates exhibit excellent heat-sealability, and have good slip characteristics and good anti-blocking characteristics.Type: GrantFiled: May 1, 2000Date of Patent: September 11, 2001Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Yasushi Seta, Yutaka Minami
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Patent number: 6270911Abstract: The invention provides (1) a propylene-ethylene-1-butene random copolymer having specific properties, (2) a resin composition comprising a propylene-ethylene-1-butene random copolymer with specific properties, and a nucleating agent, (3) a resin composition comprising a propylene-ethylene-1-butene random copolymer with specific properties, and a propylene-based polymer; and their films, and multi-layered, propylene-based laminates of which the outermost layer is made of a specific propylene-based polymer. The films and the laminates exhibit excellent heat-sealability, and have good slip characteristics and good anti-blocking characteristics.Type: GrantFiled: June 6, 2000Date of Patent: August 7, 2001Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Yasushi Seta, Yutaka Minami
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Patent number: 6150427Abstract: Provided are a foaming propylene-ethylene random copolymer which is characterized in that (1) its ethylene unit content [x (wt. %)] falls between 0.2 and 10% by weight, (2) its MI falls between 1 and 16 g/10 min, (3) its boiling diethyl ether extraction [E (wt. %)] and x satisfy the relation of a formula (I):E.ltoreq.0.25x+1.1 (I),(4) its melting point [Tm (.degree. C.)] and x satisfy the relation of a formula (II):Tm.ltoreq.165-5x (II),(5) its isotactic triad fraction in the PPP chain moiety as measured through .sup.13 C.ltoreq.NMR is not smaller than 98 mol %, and preferably, (6) the relation between the time of relaxation .tau. (sec) of the copolymer and MI of the copolymer satisfies a formula (III):.tau..ltoreq.0.80-0.42.times.log MI (III),and also its foaming beads and cellular articles. The copolymer and its foaming beads have improved primary and secondary foamability, and the cellular articles of the copolymer have excellent mechanical properties including rigidity.Type: GrantFiled: February 26, 1999Date of Patent: November 21, 2000Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Toshimichi Ito, Yasushi Seta, Ryoichi Tsunori