Patents by Inventor Takao Tayano
Takao Tayano 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: 20240343846Abstract: A polar group-containing olefin copolymer comprising a structural unit (A) derived from at least one kind of monomer selected from the group consisting of ethylene and an olefin containing 3 to 20 carbon atoms, and at least one kind of structural unit (B) selected from the group consisting of a structural unit represented by the following general formula (I) and a structural unit selected from the following general formula (II): (reference numerals shown in the general formulae (I) and (II) are as described in the DESCRIPTION.Type: ApplicationFiled: August 31, 2022Publication date: October 17, 2024Applicants: The University of Tokyo, JAPAN POLYCHEM CORPORATIONInventors: Kyoko NOZAKI, Shan TANG, Go YONEZAKI, Takao TAYANO, Akio TANNA
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Publication number: 20220220239Abstract: To provide a novel polar group-containing olefin copolymer in which an enone structure is introduced into the main chain as a structural unit. A polar group-containing olefin copolymer comprising a structural unit (A) derived from one or more monomers selected from the group consisting of ethylene and an olefin containing 3 to 20 carbon atoms, and a structural unit (B) represented by the following general formula (I): (Rx and Ry in the general formula (I) are as described in the Description.Type: ApplicationFiled: May 27, 2020Publication date: July 14, 2022Applicants: THE UNIVERSITY OF TOKYO, JAPAN POLYCHEM CORPORATIONInventors: Kyoko NOZAKI, Xiaoming WANG, Takao TAYANO
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Patent number: 11149099Abstract: Provided are a novel catalyst component for producing an ?-olefin (co)polymer, and a production method using the same. A metal complex is obtainable by contacting a compound represented by the general formula [I] or [II] with a transition metal compound containing a transition metal belonging to 9th to 11th group: wherein R1, R2, R3 and R4 represent (i) hydrogen, (ii) a halogen, (iii) a linear alkyl or the like, or (iv) OR9 or the like; R5 and R6 represent a linear alkyl group or the like; any one of R1-R6 may have a heteroatom or a heteroatom containing group; E1 represents phosphorus, arsenic or antimony; X1 represents oxygen or sulfur; Z represents hydrogen or a leaving group.Type: GrantFiled: July 26, 2017Date of Patent: October 19, 2021Assignees: THE UNIVERSITY OF TOKYO, JAPAN POLYCHEM CORPORATIONInventors: Kyoko Nozaki, Shingo Ito, Wen-Jie Tao, Yohei Konishi, Hisashi Ohtaki, Yasuo Oishi, Akio Tanna, Takao Tayano
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Patent number: 11117984Abstract: Provided are a novel catalyst component for producing an ?-olefin (co)polymer, and a production method using the same. A metal complex is obtainable by contacting a compound represented by the general formula [I] or [II] with a transition metal compound containing a transition metal belonging to 9th to 11th group: wherein R1, R2, R3 and R4 represent (i) hydrogen, (ii) a halogen, (iii) a linear alkyl or the like, or (iv) OR9 or the like; R5 and R6 represent a linear alkyl group or the like; any one of R1-R6 may have a heteroatom or a heteroatom containing group; E1 represents phosphorus, arsenic or antimony; X1 represents oxygen or sulfur; Z represents hydrogen or a leaving group.Type: GrantFiled: July 26, 2017Date of Patent: September 14, 2021Assignees: THE UNIVERSITY OF TOKYO, JAPAN POLYCHEM CORPORATIONInventors: Kyoko Nozaki, Shingo Ito, Wen-Jie Tao, Yohei Konishi, Hisashi Ohtaki, Yasuo Oishi, Akio Tanna, Takao Tayano
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Publication number: 20190263945Abstract: Provided are a novel catalyst component for producing an ?-olefin (co)polymer, and a production method using the same. A metal complex is obtainable by contacting a compound represented by the general formula [I] or [II] with a transition metal compound containing a transition metal belonging to 9th to 11th group: wherein R1, R2, R3 and R4 represent (i) hydrogen, (ii) a halogen, (iii) a linear alkyl or the like, or (iv) OR9 or the like; R5 and R6 represent a linear alkyl group or the like; any one of R1-R6 may have a heteroatom or a heteroatom containing group; E1 represents phosphorus, arsenic or antimony; X1 represents oxygen or sulfur; Z represents hydrogen or a leaving group.Type: ApplicationFiled: July 26, 2017Publication date: August 29, 2019Applicants: THE UNIVERSITY OF TOKYO, JAPAN POLYCHEM CORPORATIONInventors: Kyoko NOZAKI, Shingo ITO, Wen-Jie TAO, Yohei KONISHI, Hisashi OHTAKI, Yasuo OHISHI, Akio TANNA, Takao TAYANO
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Patent number: 9963522Abstract: The present invention provides a metallocene complex capable of producing a homopolypropylene having a high melting point in the homopolymerization of propylene, and a production method of an olefin polymer using the same. The metallocene complex of the present invention is represented by formula [I].Type: GrantFiled: March 17, 2015Date of Patent: May 8, 2018Assignee: JAPAN POLYPROPYLENE CORPORATIONInventors: Toshinori Suzuki, Masami Kashimoto, Masato Nakano, Hideshi Uchino, Takao Tayano
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Publication number: 20170081431Abstract: The present invention provides a metallocene complex capable of producing a homopolypropylene having a high melting point in the homopolymerization of propylene, and a production method of an olefin polymer using the same. The metallocene complex of the present invention is represented by formula [I].Type: ApplicationFiled: March 17, 2015Publication date: March 23, 2017Applicant: JAPAN POLYPROPYLENE CORPORATIONInventors: Toshinori SUZUKI, Masami KASHIMOTO, Masato NAKANO, Hideshi UCHINO, Takao TAYANO
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Patent number: 9505894Abstract: Provided is a polypropylene-based resin composition which gives uniform and fine cells and from which a foamed sheet and thermoform excellent in appearance, thermoformability, impact resistance, lightness, stiffness, heat resistance, heat insulating properties, oil resistance and the like can be produced and includes (X) 5 to 99% by weight of a polypropylene resin having a structure with long chain branches, and (Y) 1 to 95% by weight of a propylene-based block copolymer produced by sequential polymerization, which block copolymer comprises (Y-1) a propylene (co)polymer and (Y-2) a propylene-ethylene copolymer.Type: GrantFiled: February 22, 2013Date of Patent: November 29, 2016Assignee: JAPAN POLYPROPYLENE CORPORATIONInventors: Sachio Hotta, Kazuo Asuka, Shinichi Kitade, Kuninori Takahashi, Iku Kouzai, Takao Tayano
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Patent number: 9284427Abstract: Provided is a polypropylene-based resin composition which gives uniform and fine cells and from which a foamed sheet and thermoform excellent in appearance, thermoformability, impact resistance, lightness, stiffness, heat resistance, heat insulating properties, oil resistance and the like can be produced. A polypropylene-based resin composition comprising (X) 5 to 99% by weight of a polypropylene resin having a structure with long chain branches, and (Y) 1 to 95% by weight of a propylene-based block copolymer produced by sequential polymerization, which block copolymer comprises (Y-1) a propylene (co)polymer and (Y-2) a propylene-ethylene copolymer.Type: GrantFiled: February 22, 2013Date of Patent: March 15, 2016Assignee: Japan Polypropylene CorporationInventors: Sachio Hotta, Kazuo Asuka, Shinichi Kitade, Kuninori Takahashi, Iku Kouzai, Takao Tayano
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Publication number: 20150010747Abstract: Provided is a polypropylene-based resin composition which gives uniform and fine cells and from which a foamed sheet and thermoform excellent in appearance, thermoformability, impact resistance, lightness, stiffness, heat resistance, heat insulating properties, oil resistance and the like can be produced. A polypropylene-based resin composition comprising (X) 5 to 99% by weight of a polypropylene resin having a structure with long chain branches, and (Y) 1 to 95% by weight of a propylene-based block copolymer produced by sequential polymerization, which block copolymer comprises (Y-1) a propylene (co)polymer and (Y-2) a propylene-ethylene copolymer, said resin (X) having properties (X-i) to (X-iv) and said block copolymer (Y) having properties (Y-i) to (Y-v), and the like.Type: ApplicationFiled: February 22, 2013Publication date: January 8, 2015Applicant: Japan Polypropylene CorporationInventors: Sachio Hotta, Kazuo Asuka, Shinichi Kitade, Kuninori Takahashi, Iku Kouzai, Takao Tayano
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Publication number: 20150004394Abstract: Provided is a polypropylene-based resin composition which gives uniform and fine cells and from which a foamed sheet and thermoform excellent in appearance, thermoformability, impact resistance, lightness, stiffness, heat resistance, heat insulating properties, oil resistance and the like can be produced. A polypropylene-based resin composition comprising (X) 5 to 99% by weight of a polypropylene resin having a structure with long chain branches, and (Y) 1 to 95% by weight of a propylene-based block copolymer produced by sequential polymerization, which block copolymer comprises (Y-1) a propylene (co)polymer and (Y-2) a propylene-ethylene copolymer, said resin (X) having properties (X-i) to (X-iv) and said block copolymer (Y) having properties (Y-i) to (Y-v), and the like.Type: ApplicationFiled: February 22, 2013Publication date: January 1, 2015Applicant: JAPAN POLYPROPYLENE CORPORATIONInventors: Sachio Hotta, Kazuo Asuka, Shinichi Kitade, Kuninori Takahashi, Iku Kouzai, Takao Tayano
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Patent number: 8735513Abstract: A propylene polymerization reaction apparatus and a production method of a propylene-based polymer are capable of producing a continuous multi-stage polymer in low cost, high productivity and stably, and significantly reducing generation amount of an off-specification product accompanying change of polymerization condition, in multi-stage continuous vapor phase polymerization method of a propylene-based polymer using a catalyst for olefin polymerization. A reaction apparatus for producing a propylene-based polymer by a multi-stage continuous vapor phase polymerization method is used. One or more reactor of a horizontal-type reactor having inside a stirring machine which rotates around a horizontal axis, and a continuous stirred tank reactor to be connected to the horizontal-type reactor are provided, and a production method of a propylene-based polymer using the same.Type: GrantFiled: November 5, 2010Date of Patent: May 27, 2014Assignee: Japan Polypropylene CorporationInventors: Takanori Nakashima, Katsuhiko Oono, Kenji Mitsutani, Takao Tayano, Tomoyuki Yoshida, Shigeo Mizukami, Yusuke Yamada
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Patent number: 8546497Abstract: A propylene polymerization reaction apparatus and a production method of a propylene-based polymer are capable of producing a continuous multi-stage polymer in low cost, high productivity and stably, and significantly reducing generation amount of an off-specification product accompanying change of polymerization condition, in multi-stage continuous vapor phase polymerization method of a propylene-based polymer using a catalyst for olefin polymerization. A reaction apparatus for producing a propylene-based polymer by a multi-stage continuous vapor phase polymerization method is used. One or more reactor of a horizontal-type reactor having inside a stirring machine which rotates around a horizontal axis, and a continuous stirred tank reactor to be connected to the horizontal-type reactor are provided, and a production method of a propylene-based polymer using the same.Type: GrantFiled: November 5, 2010Date of Patent: October 1, 2013Assignee: Japan Polypropylene CorporationInventors: Takanori Nakashima, Katsuhiko Oono, Kenji Mitsutani, Takao Tayano, Tomoyuki Yoshida, Shigeo Mizukami, Yusuke Yamada
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Publication number: 20120264893Abstract: A propylene polymerization reaction apparatus and a production method of a propylene-based polymer are capable of producing a continuous multi-stage polymer in low cost, high productivity and stably, and significantly reducing generation amount of an off-specification product accompanying change of polymerization condition, in multi-stage continuous vapor phase polymerization method of a propylene-based polymer using a catalyst for olefin polymerization. A reaction apparatus for producing a propylene-based polymer by a multi-stage continuous vapor phase polymerization method is used. One or more reactor of a horizontal-type reactor having inside a stirring machine which rotates around a horizontal axis, and a continuous stirred tank reactor to be connected to the horizontal-type reactor are provided, and a production method of a propylene-based polymer using the same.Type: ApplicationFiled: November 5, 2010Publication date: October 18, 2012Applicant: JAPAN POLYPROPYLENE CORPORATIONInventors: Takanori Nakashima, Katsuhiko Oono, Kenji Mitsutani, Takao Tayano, Tomoyuki Yoshida, Shigeo Mizukami, Yusuke Yamada
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Patent number: 7390575Abstract: A polyolefin based biaxially oriented multi-layer film having at least one surface layer comprise of the propylene-ethylene random block copolymer; The propylene-ethylene random block copolymer obtained through sequential polymerization catalyzed by a metallocene component which is composed of 30 to 70 wt % of a propylene-ethylene random copolymer component having an ethylene content of 1 to 7 wt % produced in the first step of the polymerization and from 70 to 30 wt % of a low crystallinity or an amorphous propylene-ethylene random copolymer component produced in the second step of the polymerization having an ethylene content of 6 to 15 wt % higher than that of the polymer component obtained in the first step, wherein that shows a single peak at 0° C. or lower in the temperature-loss tangent (tan ?) curve obtained by dynamic mechanical analysis (DMA).Type: GrantFiled: October 18, 2004Date of Patent: June 24, 2008Assignee: Japan Polypropylene CorporationInventors: Takao Tayano, Kuninori Takahashi, Iku Kouzai, Shinichi Kitade, Shigeo Mizukami, Koichi Hirayama
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Patent number: 7189790Abstract: To develop a catalyst component for olefin polymerization, a metallocene catalyst for olefin polymerization and a process for the production of an olefin polymer capable of producing an olefin polymer having a high molecular weight and a high melting point which can be extruded or injection-molded in a high yield and a novel transition metal compound to be used in these catalyst components a catalyst component for olefin polymerization is made of a transition metal compound represented by formula (I) shown below; a metallocene catalyst for olefin polymerization comprises the catalyst component for olefin polymerization; and a process for the production of an olefin polymer is performed in the presence of the metallocene catalyst for olefin polymerization:Type: GrantFiled: September 15, 2004Date of Patent: March 13, 2007Assignee: Japan Polypropylene CorporationInventors: Naoshi Iwama, Takao Tayano, Hisashi Ohtaki
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Publication number: 20050113517Abstract: A polyolefin based biaxially oriented multi-layer film having at least one surface layer comprise of the propylene-ethylene random block copolymer; The propylene-ethylene random block copolymer obtained through sequential polymerization catalyzed by a metallocene component which is composed of 30 to 70 wt % of a propylene-ethylene random copolymer component having an ethylene content of 1 to 7 wt % produced in the first step of the polymerization and from 70 to 30 wt % of a low crystallinity or an amorphous propylene-ethylene random copolymer component produced in the second step of the polymerization having an ethylene content of 6 to 15 wt % higher than that of the polymer component obtained in the first step, wherein that shows a single peak at 0° C. or lower in the temperature-loss tangent (tan?) curve obtained by dynamic mechanical analysis (DMA).Type: ApplicationFiled: October 18, 2004Publication date: May 26, 2005Applicant: JAPAN POLYPROPYLENE CORPORATIONInventors: Takao Tayano, Kuninori Takahashi, Iku Kouzai, Shinichi Kitade, Shigeo Mizukami, Koichi Hirayama
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Patent number: 6875485Abstract: A resin composition for heat-shrinkable polypropylene shrink label, comprises: from 50 to 95% by weight of a crystalline propylene-?-olefin random copolymer mainly comprising propylene and from 5 to 50% by weight of an alicyclic hydrocarbon resin having a softening temperature of not lower than 110 degrees Celsius.Type: GrantFiled: August 13, 2001Date of Patent: April 5, 2005Assignee: Japan Polychem CorporationInventors: Gen Kanai, Takao Tayano, Tadashi Sezume
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Publication number: 20050070426Abstract: To develop a catalyst component for olefin polymerization, a metallocene catalyst for olefin polymerization and a process for the production of an olefin polymer capable of producing an olefin polymer having a high molecular weight and a high melting point which can be extruded or injection-molded in a high yield and a novel transition metal compound to be used in these catalyst components a catalyst component for olefin polymerization is made of a transition metal compound represented by formula (I) defined in the specification; a metallocene catalyst for olefin polymerization comprises the catalyst component for olefin polymerization; and a process for the production of an olefin polymer is performed in the presence of the metallocene catalyst for olefin polymerization:Type: ApplicationFiled: September 15, 2004Publication date: March 31, 2005Applicant: JAPAN POLYPROPYLENE CORPORATIONInventors: Naoshi Iwama, Takao Tayano, Hisashi Ohtaki
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Patent number: 6825280Abstract: Disclosed are a propylene polymer composition possessing excellent balance among rigidity and low warpage, resistance to deterioration caused by thermal oxidation during processing, weathering resistance, antistatic properties, and low bleeding properties, and a propylene resin composition which can easily produce molded products having excellent balance between rigidity and impact resistance (particularly low-temperature impact resistance) or heat resistance. The propylene polymer composition and the propylene resin composition comprise a propylene block copolymer consisting essentially of the following blocks (a) and (b) and having a melt flow rate of 0.Type: GrantFiled: February 7, 2000Date of Patent: November 30, 2004Assignee: Japan Polychem CorporationInventors: Yu Hayakawa, Tsuyoshi Ogasawara, Yuuji Fujita, Masao Sakaizawa, Kimiho Kosegaki, Toshihiko Sugano, Takao Tayano, Toru Suzuki, Yasuo Maruyama, Osamu Shibata, Takao Usami