Patents by Inventor Takato KAJITA
Takato KAJITA 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: 20230212344Abstract: Provided is a thermoplastic elastomer composition for an impact-resistant material, comprising a block copolymer composition comprising a block copolymer (B) in which a functional group capable of noncovalent bonding is introduced into a block copolymer (A) including at least one aromatic vinyl polymer block and at least one conjugated diene polymer block.Type: ApplicationFiled: February 4, 2021Publication date: July 6, 2023Applicants: ZEON CORPORATION, National University Corporation Tokai National Higher Education and Research SystemInventors: Sadaharu HASHIMOTO, Atsushi NOZAWA, Atsushi NORO, Takato KAJITA, Haruka TANAKA, Yushu MATSUSHITA
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Patent number: 11492452Abstract: A main purpose of the present invention is to provide a multi-block copolymer composition having good elasticity and excellent stress relaxation properties, as well as small tension set. The present invention achieves the purpose by providing a multi-block copolymer composition obtained by a modification treatment, the composition including a block copolymer B formed by introducing a functional group capable of forming a non-covalent bond to a block copolymer A; wherein the block copolymer A includes a block copolymer A1 having a specific primary structure and a block copolymer A2 having a specific primary structure, and the mass ratio (A1/A2) of the block copolymer A1 and the block copolymer A2 is 100/0 to 50/50.Type: GrantFiled: August 23, 2018Date of Patent: November 8, 2022Assignees: ZEON CORPORATION, NATIONAL UNIVERSITY CORPORATION NAGOYA UNIVERSITYInventors: Kousuke Isobe, Sadaharu Hashimoto, Atsushi Nozawa, Atsushi Noro, Takato Kajita, Yushu Matsushita
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Patent number: 11466150Abstract: A main object of the present invention is to provide a block copolymer composition which has good elasticity, while having excellent stress relaxation properties. The object is achieved by providing a block copolymer composition obtained by a modification treatment, the block copolymer composition comprising a block copolymer B formed by introducing a functional group capable of forming a non-covalent bond into a block copolymer A including at least one aromatic vinyl polymer block and at least one conjugated diene polymer block.Type: GrantFiled: May 1, 2018Date of Patent: October 11, 2022Assignees: ZEON CORPORATION, NATIONAL UNIVERSITY CORPORATION NAGOYA UNIVERSITYInventors: Kousuke Isobe, Sadaharu Hashimoto, Atsushi Nozawa, Ryoji Kameyama, Atsushi Noro, Takato Kajita, Yushu Matsushita
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Publication number: 20220320556Abstract: [Problem] Provided is a proton-conducting membrane that exhibits high proton conductivity even in low-humidity or anhydrous environments. [Solving means] A proton-conducting membrane that comprises a crosslinked polymer and a plasticizer, wherein the crosslinked polymer contains repeating units containing proton-donating groups in an amount equal to 10 mol % or more of repeating units constituting the crosslinked polymer, and at least 60 mass % of the plasticizer is a proton-donating compound with a pKa of 2.5 or less, and, the proton-conducting membrane is a viscoelastic solid in the temperature range of from 20° C. to 125° C.Type: ApplicationFiled: March 30, 2022Publication date: October 6, 2022Inventors: Naoki NAKAMURA, Masaki ANDO, Atsushi NORO, Takato KAJITA, Katsumi SATO
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Patent number: 11459417Abstract: The present invention provides a block copolymer composition comprising a block copolymer B formed by introducing a functional group capable of forming a non-covalent bond into a block copolymer A including at least one aromatic vinyl polymer block and at least one conjugated diene polymer block, wherein: the block copolymer B includes an ionic group as the functional group capable of forming a non-covalent bond.Type: GrantFiled: April 25, 2019Date of Patent: October 4, 2022Assignees: ZEON CORPORATION, NATIONAL UNIVERSITY CORPORATION TOKAI NATIONAL HIGHER EDUCATION AND RESEARCH SYSTEMInventors: Kousuke Isobe, Sadaharu Hashimoto, Atsushi Noro, Takato Kajita, Haruka Tanaka, Yushu Matsushita
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Patent number: 11322764Abstract: A proton conducting film includes a polymer having a first part and a second part which are connected by a covalent bond and a plasticizer. The first parts aggregate with each other to form a domain at an operation temperature of the proton conducting film, and the second part crosslinks the domains. The second part has a proton accepting group, and the plasticizer contains a proton donating compound having a pKa of 2.5 or less, and thus the plasticizer penetrates into the second part, and a glass transition temperature of the polymer is lowered compared to when the plasticizer is not included.Type: GrantFiled: October 18, 2019Date of Patent: May 3, 2022Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, NATIONAL UNIVERSITY CORPORATION NAGOYA UNIVERSITYInventors: Naoki Nakamura, Atsushi Noro, Takato Kajita, Haruka Tanaka, Yushu Matsushita
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Publication number: 20210230336Abstract: The present invention provides a block copolymer composition comprising a block copolymer B formed by introducing a functional group capable of forming a non-covalent bond into a block copolymer A including at least one aromatic vinyl polymer block and at least one conjugated diene polymer block, wherein: the block copolymer B includes an ionic group as the functional group capable of forming a non-covalent bond.Type: ApplicationFiled: April 25, 2019Publication date: July 29, 2021Applicants: ZEON CORPORATION, NATIONAL UNIVERSITY CORPORATION TOKAI NATIONAL HIGHER EDUCATION AND RESEARCH SYSTEMInventors: Kousuke ISOBE, Sadaharu HASHIMOTO, Atsushi NORO, Takato KAJITA, Haruka TANAKA, Yushu MATSUSHITA
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Patent number: 10950882Abstract: A proton-conductive membrane is provided, which exhibits high proton conductivity even in an anhydrous environment. The proton-conductive membrane includes a crosslinked polymer and a plasticizer, wherein the crosslinked polymer includes a proton acceptor group in an amount equal to not less than 10 mol % of repeating units constituting the crosslinked polymer, the plasticizer includes a proton donor compound having a pKa value of not more than 2.5, and the plasticizer is a viscoelastic solid in a temperature range of 50° C. to 120° C.Type: GrantFiled: January 24, 2019Date of Patent: March 16, 2021Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, NATIONAL UNIVERSITY CORPORATION NAGOYA UNIVERSITYInventors: Naoki Nakamura, Atsushi Noro, Takato Kajita, Haruka Tanaka, Yushu Matsushita
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Patent number: 10749200Abstract: A non-humidified proton-conductive membrane according to the present invention includes a polymer and a proton-conductive substance. The polymer includes a glassy or crystalline first site having a glass-transition temperature or melting temperature higher than the service temperature of the proton-conductive membrane and a second site capable of forming a noncovalent bond. The proton-conductive substance includes a proton-releasing/binding site capable of noncovalently binding to the second site of the polymer and a proton coordination site capable of coordinating to protons, the proton-releasing/binding site and the proton coordination site being included in different molecules that interact with each other or being included in the same molecule. A proton-conductive mixed phase that includes the second site to which the proton-releasing/binding site of the proton-conductive substance is bound and the proton-conductive substance is lower than the service temperature of the proton-conductive membrane.Type: GrantFiled: March 27, 2017Date of Patent: August 18, 2020Assignee: NATIONAL UNIVERSITY CORPORATION NAGOYA UNIVERSITYInventors: Atsushi Noro, Takato Kajita, Takahiro Mori, Yushu Matsushita
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Publication number: 20200255607Abstract: A main purpose of the present invention is to provide a multi-block copolymer composition having good elasticity and excellent stress relaxation properties, as well as small tension set. The present invention achieves the purpose by providing a multi-block copolymer composition obtained by a modification treatment, the composition including a block copolymer B formed by introducing a functional group capable of forming a non-covalent bond to a block copolymer A; wherein the block copolymer A includes a block copolymer A1 having a specific primary structure and a block copolymer A2 having a specific primary structure, and the mass ratio (A1/A2) of the block copolymer A1 and the block copolymer A2 is 100/0 to 50/50.Type: ApplicationFiled: August 23, 2018Publication date: August 13, 2020Applicants: ZEON CORPORATION, NATIONAL UNIVERSITY CORPORATION NAGOYA UNIVERSITYInventors: Kousuke ISOBE, Sadaharu HASHIMOTO, Atsushi NOZAWA, Atsushi NORO, Takato KAJITA, Yushu MATSUSHITA
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Publication number: 20200136164Abstract: A proton conducting film includes a polymer having a first part and a second part which are connected by a covalent bond and a plasticizer. The first parts aggregate with each other to form a domain at an operation temperature of the proton conducting film, and the second part crosslinks the domains. The second part has a proton accepting group, and the plasticizer contains a proton donating compound having a pKa of 2.5 or less, and thus the plasticizer penetrates into the second part, and a glass transition temperature of the polymer is lowered compared to when the plasticizer is not included.Type: ApplicationFiled: October 18, 2019Publication date: April 30, 2020Inventors: Naoki NAKAMURA, Atsushi NORO, Takato KAJITA, Haruka TANAKA, Yushu MATSUSHITA
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Publication number: 20200062948Abstract: A main object of the present invention is to provide a block copolymer composition which has good elasticity, while having excellent stress relaxation properties. The object is achieved by providing a block copolymer composition obtained by a modification treatment, the block copolymer composition comprising a block copolymer B formed by introducing a functional group capable of forming a non-covalent bond into a block copolymer A including at least one aromatic vinyl polymer block and at least one conjugated diene polymer block.Type: ApplicationFiled: May 1, 2018Publication date: February 27, 2020Applicants: ZEON CORPORATION, NATIONAL UNIVERSITY CORPORATION NAGOYA UNIVERSITYInventors: Kousuke ISOBE, Sadaharu HASHIMOTO, Atsushi NOZAWA, Ryoji KAMEYAMA, Atsushi NORO, Takato KAJITA, Yushu MATSUSHITA
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Publication number: 20190245234Abstract: [OBJECT] To provide a proton-conductive membrane which exhibits high proton conductivity even in an anhydrous environment. [SOLVING MEANS] Provided is a proton-conductive membrane including a crosslinked polymer and a plasticizer, wherein the crosslinked polymer includes a proton acceptor group in an amount equal to not less than 10 mol % of repeating units constituting the crosslinked polymer, the plasticizer includes a proton donor compound having a pKa value of not more than 2.5, and the plasticizer is a viscoelastic solid in a temperature range of 50° C. to 120° C.Type: ApplicationFiled: January 24, 2019Publication date: August 8, 2019Inventors: Naoki NAKAMURA, Atsushi NORO, Takato KAJITA, Haruka TANAKA, Yushu MATSUSHITA
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Publication number: 20190109343Abstract: A non-humidified proton-conductive membrane according to the present invention includes a polymer and a proton-conductive substance. The polymer includes a glassy or crystalline first site having a glass-transition temperature or melting temperature higher than the service temperature of the proton-conductive membrane and a second site capable of forming a noncovalent bond. The proton-conductive substance includes a proton-releasing/binding site capable of noncovalently binding to the second site of the polymer and a proton coordination site capable of coordinating to protons, the proton-releasing/binding site and the proton coordination site being included in different molecules that interact with each other or being included in the same molecule. A proton-conductive mixed phase that includes the second site to which the proton-releasing/binding site of the proton-conductive substance is bound and the proton-conductive substance is lower than the service temperature of the proton-conductive membrane.Type: ApplicationFiled: March 27, 2017Publication date: April 11, 2019Applicant: NATIONAL UNIVERSITY CORPORATION NAGOYA UNIVERSITYInventors: Atsushi NORO, Takato KAJITA, Takahiro MORI, Yushu MATSUSHITA