Patents by Inventor Naoshi Iwama
Naoshi Iwama 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: 10975182Abstract: The present invention relates to a polar group-containing olefin copolymer (A?) which is produced through polymerization using a transition metal catalyst, which has a weight-average molecular weight falling within a specific range and which contains a polar group-containing monomer within a specific range; a multinary polar olefin copolymer (A?) indispensably containing a polar monomer component that has a norbornene skeleton and a carboxyl group or an acid anhydride group and having three or more types of monomer units; and a resin composition (C) containing a specific amount of a polar group-containing olefin copolymer (A) and a specific amount of an olefin resin (B).Type: GrantFiled: October 1, 2018Date of Patent: April 13, 2021Assignees: JAPAN POLYETHYLENE CORPORATION, JAPAN POLYPROPYLENE CORPORATIONInventors: Kazunari Abe, Minoru Kobayashi, Hideshi Uchino, Hiroyuki Shimizu, Tetsuya Morioka, Naoshi Iwama
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Publication number: 20190062473Abstract: The present invention relates to a polar group-containing olefin copolymer (A?) which is produced through polymerization using a transition metal catalyst, which has a weight-average molecular weight falling within a specific range and which contains a polar group-containing monomer within a specific range; a multinary polar olefin copolymer (A?) indispensably containing a polar monomer component that has a norbornene skeleton and a carboxyl group or an acid anhydride group and having three or more types of monomer units; and a resin composition (C) containing a specific amount of a polar group-containing olefin copolymer (A) and a specific amount of an olefin resin (B).Type: ApplicationFiled: October 1, 2018Publication date: February 28, 2019Applicants: JAPAN POLYETHYLENE CORPORATION, JAPAN POLYPROPYLENE CORPORATIONInventors: Kazunari Abe, Minoru Kobayashi, Hideshi Uchino, Hiroyuki Shimizu, Tetsuya Morioka, Naoshi Iwama
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Patent number: 9902749Abstract: Provided are a metallocene complex that facilitates copolymerization of olefin monomers including propylene at a higher uptake rate of comonomers, i.e., ethylene and ?-olefin, manufacture of a rubber component having a higher molecular weight, and manufacture of homopolypropylene having a higher melting point through homopolymerization of propylene, compared to traditional metallocene catalysts, and a method of olefin polymerization in the presence of such a metallocene complex. Also provided are, for example, a metallocene complex represented by general formula [I] (e.g., a metallocene complex having a substituent at position 6 of one or each indenyl ring and an optionally substituted furyl or thienyl group at position 2 of one or each indenyl ring), an olefin polymerization catalyst containing the metallocene complex, and a method of olefin polymerization involving olefin polymerization or copolymerization in the presence of the olefin polymerization catalyst.Type: GrantFiled: October 28, 2013Date of Patent: February 27, 2018Assignee: JAPAN POLYPROPYLENE CORPORATIONInventors: Masami Kashimoto, Takayoshi Takahashi, Naoshi Iwama, Masato Nakano, Toshinori Suzuki
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Publication number: 20150266914Abstract: Provided are a metallocene complex that facilitates copolymerization of olefin monomers including propylene at a higher uptake rate of comonomers, i.e., ethylene and ?-olefin, manufacture of a rubber component having a higher molecular weight, and manufacture of homopolypropylene having a higher melting point through homopolymerization of propylene, compared to traditional metallocene catalysts, and a method of olefin polymerization in the presence of such a metallocene complex. Also provided are, for example, a metallocene complex represented by general formula [I] (e.g., a metallocene complex having a substituent at position 6 of one or each indenyl ring and an optionally substituted furyl or thienyl group at position 2 of one or each indenyl ring), an olefin polymerization catalyst containing the metallocene complex, and a method of olefin polymerization involving olefin polymerization or copolymerization in the presence of the olefin polymerization catalyst.Type: ApplicationFiled: October 28, 2013Publication date: September 24, 2015Applicant: JAPAN POLYPROPYLENE CORPORATIONInventors: Masami Kashimoto, Takayoshi Takahashi, Naoshi Iwama, Masato Nakano, Toshinori Suzuki
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Publication number: 20150004344Abstract: The present invention relates to a polar group-containing olefin copolymer (A?) which is produced through polymerization using a transition metal catalyst, which has a weight-average molecular weight falling within a specific range and which contains a polar group-containing monomer within a specific range; a multinary polar olefin copolymer (A?) indispensably containing a polar monomer component that has a norbornene skeleton and a carboxyl group or an acid anhydride group and having three or more types of monomer units; and a resin composition (C) containing a specific amount of a polar group-containing olefin copolymer (A) and a specific amount of an olefin resin (B).Type: ApplicationFiled: December 21, 2012Publication date: January 1, 2015Applicants: JAPAN POLYPROPYLENE CORPORATION, JAPAN POLYETHYLENE CORPORATIONInventors: Kazunari Abe, Minoru Kobayashi, Hideshi Uchino, Hiroyuki Shimizu, Tetsuya Morioka, Naoshi Iwama
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Patent number: 8461365Abstract: A metallocene complex by which high uptake efficiency of ethylene and/or ?-olefin can be obtained compared with the conventional metallocene catalyst, and robber component having high molecular weight can be polymerized, and polymerization method of olefin. Metallocene complex (metallocene complex having furyl or thienyl group in which substituent exists at 5-position of indenyl ring, and substituent may exist at 2-position of indenyl ring, and the like) represented by the general formula [II], the catalyst for olefin polymerization characterized by comprising said metallocene complex, and polymerization method of olefin characterized that polymerization or copolymerization of olefin is carried out using said polymerization catalyst for olefin, and the like.Type: GrantFiled: December 14, 2009Date of Patent: June 11, 2013Assignee: Japan Polypropylene CorporationInventors: Masato Nakano, Hideshi Uchino, Naoshi Iwama, Masami Kashimoto, Tomohiro Kato
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Publication number: 20110230622Abstract: A metallocene complex by which high uptake efficiency of ethylene and/or ?-olefin can be obtained compared with the conventional metallocene catalyst, and rubber component having high molecular weight can be polymerized, and polymerization method of olefin. Metallocene complex (metallocene complex having furyl or thienyl group in which substituent exists at 5-position of indenyl ring, and substituent may exist at 2-position of indenyl ring, and the like) represented by the general formula [I], the catalyst for olefin polymerization characterized by comprising said metallocene complex, and polymerization method of olefin characterized in that polymerization or copolymerization of olefin is carried out using said polymerization catalyst for olefin, and the like.Type: ApplicationFiled: December 14, 2009Publication date: September 22, 2011Applicant: JAPAN POLYPROPYLENE CORPORATIONInventors: Masato Nakano, Hideshi Uchino, Naoshi Iwama, Masami Kashimoto, Tomohiro Kato
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Patent number: 7906599Abstract: Disclosed is a novel transition metal compound which is used for forming a metallocene catalyst for olefin polymerization. Specifically disclosed is a novel transition metal compound represented by the general formula below which enables to form a metallocene catalyst that has a balanced reactivity with ethylene and a comonomer selected from ?-olefins having 3-20 carbon atoms and enables to produce an ?-olefin polymer having a high molecular weight. Also specifically disclosed are a catalyst for olefin polymerization containing such a transition metal compound, and a method for producing a propylene/ethylene-?-olefin block copolymer wherein such a catalyst is used.Type: GrantFiled: April 17, 2007Date of Patent: March 15, 2011Assignee: Japan Polypropylene CorporationInventors: Hisashi Ohtaki, Naoshi Iwama, Masami Kashimoto, Tomohiro Kato, Tsutomu Ushioda
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Publication number: 20090099310Abstract: Disclosed is a novel transition metal compound which is used for forming a metallocene catalyst for olefin polymerization. Specifically disclosed is a novel transition metal compound represented by the general formula below which enables to form a metallocene catalyst that has a balanced reactivity with ethylene and a comonomer selected from ?-olefins having 3-20 carbon atoms and enables to produce an ?-olefin polymer having a high molecular weight. Also specifically disclosed are a catalyst for olefin polymerization containing such a transition metal compound, and a method for producing a propylene/ethylene-?-olefin block copolymer wherein such a catalyst is used.Type: ApplicationFiled: April 17, 2007Publication date: April 16, 2009Applicant: JAPAN POLYPROPYLENE CORPORATIONInventors: Hisashi Ohtaki, Naoshi Iwama, Masami Kashimoto, Tomohiro Kato, Tsutomu Ushioda
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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: 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: 6590045Abstract: Catalysts for polymerization of &agr;-olefin, composed of a transition metal compound, an inorganic silicate or an ion exchangeable layer compound other than silicate, and optionally an organoaluminum compound, are described.Type: GrantFiled: October 1, 2001Date of Patent: July 8, 2003Assignee: Mitsubishi Chemical CorporationInventors: Toshihiko Sugano, Naoshi Iwama, Eiji Isobe, Toru Suzuki, Yasuo Maruyama
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Publication number: 20020045535Abstract: Catalysts for polymerization of &agr;-olefin, composed of a transition metal compound, an inorganic silicate or an ion exchangeable layer compound other than silicate, and optionally an organoaluminum compound, are described.Type: ApplicationFiled: October 1, 2001Publication date: April 18, 2002Applicant: Mitsubishi Chemical Corporation.Inventors: Toshihiko Sugano, Naoshi Iwama, Eiji Isobe, Toru Suzuki, Yasuo Maruyama
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Patent number: 6344530Abstract: The present invention relates to a catalyst for polymerization of &agr;-olefin, which comprises: an essential component (A) of a transition metal compound, an essential component (B) of an ion exchangeable layer compound except for silicate, or an inorganic silicate, and an optional component (C) of an organoaluminum compound, said component (A) being represented by the general formula (I):Type: GrantFiled: April 17, 2001Date of Patent: February 5, 2002Assignee: Mitsubishi Chemical CorporationInventors: Toshihiko Sugano, Naoshi Iwama, Satoshi Hayakawa, Hisashi Shoda, Masami Kashimoto, Taku Kato, Takayuki Aoshima
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Patent number: 6340652Abstract: Catalysts for polymerization of &agr;-olefin, composed of a transition metal compound, an inorganic silicate or an ion exchangeable layer compound other than silicate, and optionally an organoaluminum compound, are described.Type: GrantFiled: December 9, 1997Date of Patent: January 22, 2002Assignee: Mitsubishi Chemical CorporationInventors: Toshihiko Sugano, Naoshi Iwama, Eiji Isobe, Toru Suzuki, Yasuo Maruyama, Satoshi Hayakawa, Hisashi Shoda, Masami Kashimoto, Taku Kato, Takayuki Aoshima, Sugio Nishimura, Yoshinori Suga, Stefan Sieber
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Publication number: 20010034425Abstract: The present invention relates to a catalyst for polymerization of &agr;-olefin, which comprises:Type: ApplicationFiled: April 17, 2001Publication date: October 25, 2001Applicant: Mitsubishi Chemical CorporationInventors: Toshihiko Sugano, Naoshi Iwama, Eiji Isobe, Toru Suzuki, Yasuo Maruyama, Satoshi Hayakawa, Hisashi Shoda, Masami Kashimoto, Taku Kato, Takayuki Aoshima, Sugio Nishimura, Yoshinori Suga, Stefan Sieber
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Patent number: 6252097Abstract: The present invention relates to a catalyst for polymerization of &agr;-olefin, which comprises: an essential component (A) of a transition metal compound, an essential component (B) of an ion exchangeable layer compound except for silicate, or an inorganic silicate, and an optional component (C) of an organoaluminum compound, said component (A) being represented by the general formula (I):Type: GrantFiled: May 20, 1999Date of Patent: June 26, 2001Assignee: Mitsubishi Chemical CorporationInventors: Toshihiko Sugano, Naoshi Iwama, Eiji Isobe, Toru Suzuki, Yasuo Maruyama, Satoshi Hayakawa, Hisashi Shoda, Masami Kashimoto, Taku Kato, Takayuki Aoshima, Sugio Nishimura, Yoshinori Suga, Stefan Sieber
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Patent number: 6084043Abstract: A catalyst component for the polymerization of alpha-olefins, represented by the following formula [I]: ##STR1## wherein R.sup.1 -R.sup.3 =H, a halogen, a C.sub.1-10 hydrocarbon radical, a Si-containing C.sub.1-18 hydrocarbon radical, or a halogen-containing C.sub.1-10, hydrocarbon radical (provided that R.sup.1 and R.sup.2 cannot be hydrogen at the same time); n=2 to 7; Q=a C.sub.1-20 hydrocarbon radical, a silylene or oligosilylene group having or not having a C.sub.1-20 hydrocarbon radical, a germylene group having or not having a C.sub.1-20 hydrocarbon radical; X and Y=H, a halogen, a C.sub.1-20 hydrocarbon radical, or an O- or N-containing C.sub.1-20 hydrocarbon radical; and M=a transition metal selected from the groups IVB-VIB; a catalyst for the polymerization of alpha-olefins, comprising the catalyst component; and a process for producing alpha-olefin polymers, where use is made of the catalyst.Type: GrantFiled: November 20, 1997Date of Patent: July 4, 2000Assignee: Mitsubishi Chemical CorporationInventors: Toshihiko Sugano, Hideshi Uchino, Kaori Imaeda, Eiji Taniyama, Naoshi Iwama
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Patent number: 5594081Abstract: The present invention provides a catalyst for polymerizing an .alpha.-olefin which is capable of producing an .alpha.-olefin polymer having a high molecular weight in a high yield under the polymerization conditions including at high temperature, and a process for preparing an .alpha.-olefin polymer, which catalyst comprises a Component (A) which comprises a coordination compound having a skeleton of a metallocene compound comprising an indenyl ring or a hydroindenyl ring which is an indenyl having a six-membered portion hydrogenated as a ligand and having Ti, Zr or Hf as a metal component in combination with a Component (B) which is, for example, an alumoxane. The coordination compound is crosslinked at the six-membered rings characterized by the fact that two of the indenyl or hydroindenyl groups are crosslinked at the six-membered ring of the indenyl or hydroindenyl group.Type: GrantFiled: July 20, 1995Date of Patent: January 14, 1997Assignee: Mitsubishi Chemical CorporationInventors: Hideshi Uchino, June Endo, Toshihiko Sugano, Tomohiko Takahama, Taku Kato, Eiji Taniyama, Naoshi Iwama