Patents by Inventor Akitsugu SHIBATA
Akitsugu SHIBATA 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: 20240097135Abstract: A secondary battery electrode binder exhibits superior binding capacity as compared to conventional binders and makes it possible to reduce slurry viscosity, even when the solid concentration of an electrode slurry is high. A secondary battery electrode binder contains a block polymer having a polymer block (A) and a polymer block (B), wherein: the polymer block (A) includes a structural unit derived from an ethylenically unsaturated carboxylic acid monomer; the content of a structural unit derived from an ethylenically unsaturated carboxylic acid monomer in the polymer block (B) is less than 30 mass % (and is different from that in the polymer block (A)) with respect to all the structural units of the polymer block (B); the ratio of the polymer block (A) in the block polymer is 10-90 mass %; and the block polymer does not contain a structural unit derived from a crosslinkable monomer.Type: ApplicationFiled: December 21, 2021Publication date: March 21, 2024Applicant: TOAGOSEI CO., LTD.Inventors: Akitsugu SHIBATA, Naohiko SAITO
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Patent number: 11643576Abstract: A pressure-sensitive adhesive composition includes a block copolymer containing a polymer block (A) and a (meth)acrylic polymer block (B), wherein the polymer block (A) contains either or both of a maleimide compound and an amide group-containing vinyl compound as a constitutional monomer thereof and has a glass transition temperature of 100° C. or higher, and the (meth)acrylic polymer block (B) contains at least one selected from compounds represented by general formula (1) as a major constitutional monomer thereof and has a glass transition temperature of 10° C. or below. CH2?CR1—C(?O)O(R2O)n—R3??(1) (wherein, R1 represents hydrogen or a methyl group; R2 represents a linear or branched C2-6 alkylene group; R3 represents hydrogen, a C1-20 alkyl group, or a C6-20 aryl group; and n represents 0 or an integer from 1 to 100.Type: GrantFiled: February 9, 2018Date of Patent: May 9, 2023Assignee: TOAGOSEI CO. LTD.Inventors: Michihiro Kaai, Kenichi Nakamura, Akitsugu Shibata
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Patent number: 10982115Abstract: An adhesive composition according to the present invention contains a polymerizable monomer (A) and a block copolymer (B) including a polymer block (a) which includes structural units derived from a styrene compound and from a maleimide compound, and an acrylic polymer block (b), in which the polymer block (a) and the acrylic polymer block (b) have a solubility parameter of 10.0 or more and 9.0 or more, respectively; the polymer block (a) contains the structural unit derived from a maleimide compound at a concentration from 30% by mass to 99% by mass with respect to the total mass of the polymer block (a); the polymer block (a) has a glass transition temperature of 150° C. or higher; and the polymer block (b) has a glass transition temperature of 20° C. or lower.Type: GrantFiled: April 26, 2018Date of Patent: April 20, 2021Assignee: TOAGOSEI CO., LTD.Inventors: Masaru Andou, Yuushi Andou, Akitsugu Shibata, Michihiro Kaai
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Patent number: 10847837Abstract: A binder for a nonaqueous electrolyte secondary battery electrode, containing a crosslinked polymer or salt thereof having a carboxyl group and a use thereof, and a method of manufacturing the polymer or salt. The polymer has a structural unit derived from an ethylenically unsaturated carboxylic acid monomer in an amount of 50 to 99 mass % of total structural units and a structural unit derived from a nonionic ethylenically unsaturated monomer in an amount of 1 to 50 mass % of the total structural units, the monomer is a compound having a substituent with a carbon atom number of 6 or more, and a particle diameter of the crosslinked polymer is 0.1 to 7.0 ?m in a volume-based median diameter when the crosslinked polymer is neutralized to a neutralization degree of 80 to 100 mol %, subjected to water swelling in water, and then dispersed in a 1 mass % NaCl aqueous solution.Type: GrantFiled: January 24, 2017Date of Patent: November 24, 2020Assignee: TOAGOSEI CO. LTD.Inventors: Hideo Matsuzaki, Naohiko Saito, Kinuko Fujikura, Atsushi Nishiwaki, Akitsugu Shibata
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Patent number: 10790542Abstract: A binder for a nonaqueous electrolyte secondary battery electrode, containing a crosslinked polymer or salt thereof having a carboxyl group and a use thereof, and a method of manufacturing the polymer or salt. The polymer has a structural unit derived from an ethylenically unsaturated carboxylic acid monomer in an amount of 50 to 99 mass % of total structural units and a structural unit derived from a nonionic ethylenically unsaturated monomer in an amount of 1 to 50 mass % of the total structural units, the monomer is a compound having a substituent with a carbon atom number of 6 or more, and a particle diameter of the crosslinked polymer is 0.1 to 7.0 ?m in a volume-based median diameter when the crosslinked polymer is neutralized to a neutralization degree of 80 to 100 mol %, subjected to water swelling in water, and then dispersed in a 1 mass % NaCl aqueous solution.Type: GrantFiled: January 24, 2017Date of Patent: September 29, 2020Assignee: TOAGOSEI CO. LTD.Inventors: Hideo Matsuzaki, Naohiko Saito, Kinuko Fujikura, Atsushi Nishiwaki, Akitsugu Shibata
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Patent number: 10680246Abstract: Provided is a binder for a nonaqueous electrolyte secondary battery electrode. The binder contains a crosslinked polymer having a carboxyl group, or salt thereof, a use therefor, and a method for manufacturing a carboxyl group-containing crosslinked polymer or salt thereof for use in the binder. The crosslinked polymer contains a structural unit derived from an ethylenically unsaturated carboxylic acid monomer in the amount of 50 to 100 mass % of total structural units, and after the crosslinked polymer neutralized to a degree of a neutralization of 80 to 100 mol % has been subjected to water swelling in water and then dispersed in a 1 mass % NaCl aqueous solution, the particle diameter thereof is 0.1 to 7.0 ?m in a volume-based median diameter.Type: GrantFiled: October 26, 2016Date of Patent: June 9, 2020Assignee: TOAGOSEI CO., LTD.Inventors: Hideo Matsuzaki, Naohiko Saito, Kinuko Ogura, Atsushi Nishiwaki, Akitsugu Shibata
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Publication number: 20200048499Abstract: An adhesive composition according to the present invention contains a polymerizable monomer (A) and a block copolymer (B) including a polymer block (a) which includes structural units derived from a styrene compound and from a maleimide compound, and an acrylic polymer block (b), in which the polymer block (a) and the acrylic polymer block (b) have a solubility parameter of 10.0 or more and 9.0 or more, respectively; the polymer block (a) contains the structural unit derived from a maleimide compound at a concentration from 30% by mass to 99% by mass with respect to the total mass of the polymer block (a); the polymer block (a) has a glass transition temperature of 150° C. or higher; and the polymer block (b) has a glass transition temperature of 20° C. or lower.Type: ApplicationFiled: April 26, 2018Publication date: February 13, 2020Applicant: TOAGOSEI CO., LTD.Inventors: Masaru ANDOU, Yuushi ANDOU, Akitsugu SHIBATA, Michihiro KAAI
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Publication number: 20200002580Abstract: A pressure-sensitive adhesive composition includes a block copolymer containing a polymer block (A) and a (meth)acrylic polymer block (B), wherein the polymer block (A) contains either or both of a maleimide compound and an amide group-containing vinyl compound as a constitutional monomer thereof and has a glass transition temperature of 100° C. or higher, and the (meth)acrylic polymer block (B) contains at least one selected from compounds represented by general formula (1) as a major constitutional monomer thereof and has a glass transition temperature of 10° C. or below. CH2?CR1—C(?O)O(R2O)n—R3??(1) (wherein, R1 represents hydrogen or a methyl group; R2 represents a linear or branched C2-6 alkylene group; R3 represents hydrogen, a C1-20 alkyl group, or a C6-20 aryl group; and n represents 0 or an integer from 1 to 100.Type: ApplicationFiled: February 9, 2018Publication date: January 2, 2020Applicant: TOAGOSEI CO., LTD.Inventors: Michihiro KAAI, Kenichi NAKAMURA, Akitsugu SHIBATA
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Publication number: 20190036164Abstract: A binder for a nonaqueous electrolyte secondary battery electrode, containing a crosslinked polymer or salt thereof having a carboxyl group and a use thereof, and a method of manufacturing the polymer or salt. The polymer has a structural unit derived from an ethylenically unsaturated carboxylic acid monomer in an amount of 50 to 99 mass % of total structural units and a structural unit derived from a nonionic ethylenically unsaturated monomer in an amount of 1 to 50 mass % of the total structural units, the monomer is a compound having a substituent with a carbon atom number of 6 or more, and a particle diameter of the crosslinked polymer is 0.1 to 7.0 ?m in a volume-based median diameter when the crosslinked polymer is neutralized to a neutralization degree of 80 to 100 mol %, subjected to water swelling in water, and then dispersed in a 1 mass % NaCl aqueous solution.Type: ApplicationFiled: January 24, 2017Publication date: January 31, 2019Applicant: Toagosei Co., Ltd.Inventors: Hideo MATSUZAKI, Naohiko SAITO, Kinuko FUJIKURA, Atsushi NISHIWAKI, Akitsugu SHIBATA
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Publication number: 20170352886Abstract: Provided is a binder for a nonaqueous electrolyte secondary battery electrode. The binder contains a crosslinked polymer having a carboxyl group, or salt thereof, a use therefor, and a method for manufacturing a carboxyl group-containing crosslinked polymer or salt thereof for use in the binder. The crosslinked polymer contains a structural unit derived from an ethylenically unsaturated carboxylic acid monomer in the amount of 50 to 100 mass % of total structural units, and after the crosslinked polymer neutralized to a degree of a neutralization of 80 to 100 mol % has been subjected to water swelling in water and then dispersed in a 1 mass % NaCl aqueous solution, the particle diameter thereof is 0.1 to 7.0 ?m in a volume-based median diameter.Type: ApplicationFiled: October 26, 2016Publication date: December 7, 2017Applicant: TOAGOSEI CO. LTD.Inventors: Hideo MATSUZAKI, Naohiko SAITO, Kinuko OGURA, Atsushi NISHIWAKI, Akitsugu SHIBATA