Patents Assigned to Dai-Ichi Kogyo Seiyaku Co., Ltd.
  • Patent number: 11437607
    Abstract: A composition that includes a dispersion stabilizer for an electrode coating liquid for a power storage device is provided. The composition has superior ability to stably disperse an electrode active material and a conductive material, and makes it possible to manufacture a uniform electrode, even when a dispersion device that has weak shear force is used. A dispersant for an electrode coating liquid for a power storage device, the dispersant being characterized by containing cellulose fibers that satisfy (a)-(c). (a) The number average width of the short widths is 2-200 nm. (b) The aspect ratio is 7.5-250. (c) Cellulose I crystals are included and the crystallinity thereof is 70%-95%.
    Type: Grant
    Filed: January 24, 2018
    Date of Patent: September 6, 2022
    Assignee: DAI-ICHI KOGYO SEIYAKU CO., LTD.
    Inventors: Ayano Sofue, Yasuteru Saito, Yosuke Goi, Yoshiki Ito, Tetsuya Higashizaki, Yuji Hoshihara, Masaaki Matsumoto
  • Patent number: 11424439
    Abstract: A negative electrode of a nonaqueous electrolyte secondary battery, which is provided with a collector and a negative electrode active material layer that is formed on the collector, and which is characterized in that: the negative electrode active material layer contains a carbon-based negative electrode active material, a silicon-based negative electrode active material, a conductive agent and a predetermined carboxy methylcellulose or a salt thereof; the content of the carboxy methylcellulose or a salt thereof is from 4% by mass to 15% by mass (inclusive) relative to the total mass of the negative electrode active material layer; and the content of the silicon-based negative electrode active material relative to the total content of the carbon-based negative electrode active material and the silicon-based negative electrode active material is from 3% by mass to 19% by mass (inclusive).
    Type: Grant
    Filed: October 17, 2017
    Date of Patent: August 23, 2022
    Assignee: DAI-ICHI KOGYO SEIYAKU CO., LTD.
    Inventors: Shiho Nakamura, Atsushi Sanuki
  • Patent number: 11289693
    Abstract: Provided is a lithium-ion battery or lithium-ion capacitor electrode material that can compensate for the drawbacks of a hydrophobic active material, that can impart hydrophilicity to the hydrophobic active material, and that can exhibit excellent dispersibility without deteriorating electrode characteristics. Specifically provided is an electrode material for a lithium-ion battery or a lithium-ion capacitor, the electrode material comprising a composite powder in which a B component is supported or coated on a surface of an A component, the A component comprising a material capable of electrochemically occluding and releasing lithium ions, the B component being sulfur-modified cellulose, and the B component being contained in an amount of 0.01 mass % or more based on 100 mass % of the total amount of the A component and the B component.
    Type: Grant
    Filed: July 23, 2018
    Date of Patent: March 29, 2022
    Assignees: DAI-ICHI KOGYO SEIYAKU CO., LTD., NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
    Inventors: Takashi Mukai, Yuta Ikeuchi, Masahiro Yanagida, Yasuteru Saitou, Ayano Sofue, Tetsuya Higashizaki
  • Publication number: 20210238641
    Abstract: A method for producing a cellooligosaccharide that enables the formation of a cellooligosaccharide having a high degree of polymerization to be suppressed in enzymatic synthesis of a cellooligosaccharide, the method comprising reacting ?-glucose-1-phosphate and at least one primer selected from the group consisting of glucose, cellobiose, and alkylated glucose with cellodextrin phosphorylase in a mixed solvent containing water and a water-soluble organic solvent.
    Type: Application
    Filed: April 11, 2019
    Publication date: August 5, 2021
    Applicants: DAI-ICHI KOGYO SEIYAKU CO., LTD., TOKYO INSTITUTE OF TECHNOLOGY
    Inventors: Takeshi SERIZAWA, Toshiki SAWADA, Masahito NISHIURA
  • Publication number: 20210221941
    Abstract: As a thermoplastic resin used as a matrix resin for a fiber-reinforced composite material, a thermoplastic resin having a high glass transition temperature in spite of having a low resin viscosity during molding is provided. Provided are a two-liquid curable composition for forming a thermoplastic matrix resin, the two-liquid curable composition containing an active hydrogen component containing an alkylthio group-containing aromatic diamine (A) and a diisocyanate component containing at least one kind of diisocyanate (B) selected from the group consisting of aliphatic diisocyanates, alicyclic diisocyanates, and modified forms of aliphatic diisocyanates and alicyclic diisocyanates, a matrix resin for a fiber-reinforced composite material, the matrix resin being a thermoplastic resin containing a reaction product of the active hydrogen component and the diisocyanate component, and a fiber-reinforced composite material containing the matrix resin and reinforcing fiber.
    Type: Application
    Filed: April 9, 2019
    Publication date: July 22, 2021
    Applicant: DAI-ICHI KOGYO SEIYAKU CO., LTD.
    Inventors: Yoshinori YAMADA, Takuma NISHIMURA, Kei OIKAWA
  • Publication number: 20210226217
    Abstract: An electrode coating liquid composition that contains an electrode active material, a conductive auxiliary, a dispersant, and a binding agent. The dispersant contains cellulose fibers that satisfy (a)-(c). A total amount of the dispersant and the binding agent is 0.5 mass % or more and 15 mass % or less with respect to 100 mass % of the solid content of the electrode coating liquid composition. (a) the number average width of the shortest widths is 2 nm or more and 200 nm or less. (b) the aspect ratio is 7.5 or more and 75 or less. (c) cellulose I crystals are included and the crystallinity thereof is 70% or more and 95% or less.
    Type: Application
    Filed: January 24, 2018
    Publication date: July 22, 2021
    Applicant: DAI-ICHI KOGYO SEIYAKU CO.,LTD.
    Inventors: Ayano SOFUE, Yasuteru SAITO, Yosuke GOI, Yoshiki ITO, Tetsuya Higashizaki, Yuji Hoshihara, Masaaki MATSUMOTO
  • Publication number: 20210210740
    Abstract: A composition that includes a dispersion stabilizer for an electrode coating liquid for a power storage device is provided. The composition has superior ability to stably disperse an electrode active material and a conductive material, and makes it possible to manufacture a uniform electrode, even when a dispersion device that has weak shear force is used. A dispersant for an electrode coating liquid for a power storage device, the dispersant being characterized by containing cellulose fibers that satisfy (a)-(c). (a) The number average width of the short widths is 2-200 nm. (b) The aspect ratio is 7.5-250. (c) Cellulose I crystals are included and the crystallinity thereof is 70%-95%.
    Type: Application
    Filed: January 24, 2018
    Publication date: July 8, 2021
    Applicant: DAI-ICHI KOGYO SEIYAKU CO., LTD.
    Inventors: Ayano SOFUE, Yasuteru SAITO, Yosuke GOI, Yoshiki ITO, Tetsuya Higashizaki, Yuji Hoshihara, Masaaki MATSUMOTO
  • Publication number: 20210135273
    Abstract: The production method is for an electrochemical device equipped with a pair of electrodes and an electrolyte located therebetween. The electrolyte with which the electrochemical device is provided is a gel-form body constituted by at least a matrix material and an electrolytic solution, contains cross-linkable reaction groups, and has a raised gel electrolyte hardening degree (hard gel electrolyte). The production method for the electrochemical device comprises an electrolyte hardening degree raising step of causing, with the gel electrolyte in a held state between the pair of electrodes, a crosslinking of the reaction groups to proceed, thereby causing the gel electrolyte hardening degree to be raised, while causing the electrolytic solution to seep out from the gel electrolyte as crosslinking proceeds.
    Type: Application
    Filed: December 5, 2017
    Publication date: May 6, 2021
    Applicant: DAI-ICHI KOGYO SEIYAKU CO., LTD.
    Inventors: Yasuteru SAITOU, Junshi OKUHARA
  • Publication number: 20210130611
    Abstract: Provided are a two-component curable composition, for manufacture of a thermoplastic polyurethane resin, that exhibits low mixing viscosity and high glass transition temperature after curing, a thermoplastic polyurethane resin that is a cured product thereof, and a fiber-reinforced resin including the thermoplastic polyurethane resin. The two-component curable composition for manufacture of a thermoplastic polyurethane resin is a two-component curable composition including a polyol component including a diol (A) and a polyisocyanate component including a diisocyanate (B). The diol (A) includes a diol (A-1) having an aromatic ring and having a molecular weight of 200 to 700 and a diol (A-2) having no aromatic ring and having a molecular weight of 500 or less. The ratio ((A-1)/((A-1)+(A-2))) of the mass of the diol (A-1) to the total mass of the diol (A-1) and the diol (A-2) is (10/100) to (75/100).
    Type: Application
    Filed: April 9, 2019
    Publication date: May 6, 2021
    Applicant: DAI-ICHI KOGYO SEIYAKU CO., LTD.
    Inventors: Takuma NISHIMURA, Yoshinori YAMADA, Kei OIKAWA
  • Patent number: 10946557
    Abstract: A release agent for vulcanized rubber molding is provided which has excellent mold releasing properties and washability. This release agent for vulcanized rubber molding contains an alkylene oxide adduct (A) of an active hydrogen group-containing compound having four active hydrogen atoms in the molecule, wherein the aforementioned alkylene oxide adduct (A) of an active hydrogen group-containing compound has a number average molecular weight of 5000-30000, and contains 50-95 mass % of an oxyethylene group.
    Type: Grant
    Filed: April 26, 2017
    Date of Patent: March 16, 2021
    Assignee: DAI-ICHI KOGYO SEIYAKU CO., LTD.
    Inventors: Takuya Horie, Toshikazu Nabeshima, Kazunori Nakagawa
  • Patent number: 10941218
    Abstract: Provided is a carboxymethyl cellulose or a salt thereof, in which when the carboxymethyl cellulose or the salt thereof is used as a binding agent for an electrode of a nonaqueous electrolyte secondary battery, defects, such as pinholes, on a surface of the electrode are reduced and a battery including the electrode has a good capacity retention. A method for producing a carboxymethyl cellulose or a salt thereof includes an alkali cellulose formation step (step 1) of allowing cellulose and an alkali to react with each other in the presence of a mixed solvent containing water and an organic solvent, an etherification step (step 2) of allowing the resulting alkali cellulose and an etherifying agent to react with each other, a purification step (step 3) of washing and drying the resulting reaction mixture, and a pulverization step (step 4) of pulverizing the resulting purified product.
    Type: Grant
    Filed: February 16, 2017
    Date of Patent: March 9, 2021
    Assignee: DAI-ICHI KOGYO SEIYAKU CO., LTD.
    Inventors: Ryo Kakubari, Atsushi Sanuki
  • Patent number: 10940453
    Abstract: The polymerization stability and the chemical stability and the water resistance of resin films are improved. A surfactant composition according to an embodiment contains a surfactant (A) represented by general formula (1) and an anionic surfactant (B) having a hydrophobic group different from that of the surfactant (A). R1 represents an alkyl group with 8 to 14 carbon atoms, A represents an alkylene group with 2 to 4 carbon atoms, and n representing an average number of moles of an oxyalkylene group added represents 1 to 100.
    Type: Grant
    Filed: August 22, 2017
    Date of Patent: March 9, 2021
    Assignee: DAI-ICHI KOGYO SEIYAKU CO., LTD.
    Inventors: Masatake Joyabu, Kei Shiohara, Asako Ogasawara, Takuro Kimura, Chi Tao
  • Publication number: 20210062406
    Abstract: Provided is a method for producing a chemically modified cellulose fiber with which fibrillation can be performed along with sulfation reaction. The method for producing a chemically modified cellulose fiber includes a step (a) of treating a cellulose fiber with sulfamic acid to allow a cellulose fine fiber which is a constituent of the cellulose fiber to react with the sulfamic acid, thereby substituting some of hydroxyl groups of cellulose with a substituent represented by a structural formula (1) below (where M represents a monovalent to trivalent cation), and a step (b) of performing fibrillation simultaneously with the step (a).
    Type: Application
    Filed: September 28, 2018
    Publication date: March 4, 2021
    Applicant: DAI-ICHI KOGYO SEIYAKU CO., LTD.
    Inventors: Yuka KITANO, Masayuki HASHIMOTO
  • Publication number: 20210009778
    Abstract: The present invention provides a recyclable flame-retardant expandable styrene-based resin composition that attains high flame retardancy and high heat stability with a small addition amount of a bromine-containing flame retardant. Specifically, the present invention provides a flame-retardant expandable styrene-based resin composition comprising a styrene-based resin (A), a flame retardant (B), fatty acid zinc (C), a heat stabilizer (D), and a foaming agent (F), wherein the flame retardant (B) comprises tetrabromobisphenol A-bis(2,3-dibromo-2-methylpropyl ether) (B1) and a bromine-containing flame retardant (B2) other than (B1).
    Type: Application
    Filed: July 31, 2018
    Publication date: January 14, 2021
    Applicant: DAI-ICHI KOGYO SEIYAKU CO., LTD.
    Inventor: Masahito NISHIURA
  • Patent number: 10870222
    Abstract: Provided is a release agent for vulcanized rubber molding, the release agent exhibiting good mold releasability between a mold and a rubber after vulcanization and capable of being easily removed after production. The release agent for vulcanized rubber molding contains a polyoxyalkylene glyceryl ether (A). The polyoxyalkylene glyceryl ether (A) contains 50% to 95% by mass of oxyethylene groups in 100% by mass of oxyalkylene groups. The polyoxyalkylene glyceryl ether (A) preferably has a number-average molecular weight of 2,000 to 20,000.
    Type: Grant
    Filed: January 18, 2016
    Date of Patent: December 22, 2020
    Assignee: DAI-ICHI KOGYO SEIYAKU CO., LTD.
    Inventors: Shigeru Kigasawa, Toshikazu Nabeshima, Takuya Horie
  • Publication number: 20200388827
    Abstract: A negative electrode active material coating material capable of providing a secondary battery that is of low cost, has high capacity, and has excellent battery characteristics, a negative electrode, and a secondary battery are provided. The negative electrode active material coating material contains a negative electrode active material, a conductive agent, an aqueous binder, water, and a solvent, wherein the boiling point of the solvent is 200° C. or more and 300° C. or less, the water solubility of the solvent is 20 g/L or more, and the content of the solvent is 0.1% by mass or more and 10% by mass or less with respect to 100% by mass of the negative electrode active material coating material.
    Type: Application
    Filed: September 28, 2018
    Publication date: December 10, 2020
    Applicant: DAI-ICHI KOGYO SEIYAKU CO., LTD.
    Inventors: Atsushi SANUKI, Yuka KAWANO, Shiho NAKAMURA
  • Publication number: 20200365843
    Abstract: Provided are a battery holder that enables efficient production of a battery pack of excellent quality, and a battery pack using the battery holder. A battery holder 10 includes at least a tubular body having a through-space (battery storage portion 10a) for storing a battery, such as a lithium-ion battery 20, inside. This tubular body is formed of a resin composition containing an inorganic filler.
    Type: Application
    Filed: January 15, 2019
    Publication date: November 19, 2020
    Applicant: DAI-ICHI KOGYO SEIYAKU CO., LTD.
    Inventors: Akiyoshi NISHIKAWA, Tetsuya HIGASHIZAKI, Mana ISHINO, Takashi KITAGAWA, Toshikazu AKAO
  • Patent number: 10836911
    Abstract: In order to provide a filler composition for fabricating a high-performance filler achieving good productivity while preventing worsening of a working environment and production of a VOC and to provide a filler and a method for producing the filler, a filler composition of the present invention contains wet silica, a polyoxyethylene unsaturated fatty acid ester, and a sulfur-containing silane coupling agent.
    Type: Grant
    Filed: June 26, 2015
    Date of Patent: November 17, 2020
    Assignees: Dai-Ichi Kogyo Seiyaku Co., Ltd., Osaka Soda Co., Ltd.
    Inventors: Toshio Kagimasa, Nahoko Izaki, Shoukichi Nakamura, Tomoyuki Ichino, Ryota Fukitani
  • Publication number: 20200251720
    Abstract: Provided is a lithium-ion battery or lithium-ion capacitor electrode material that can compensate for the drawbacks of a hydrophobic active material, that can impart hydrophilicity to the hydrophobic active material, and that can exhibit excellent dispersibility without deteriorating electrode characteristics. Specifically provided is an electrode material for a lithium-ion battery or a lithium-ion capacitor, the electrode material comprising a composite powder in which a B component is supported or coated on a surface of an A component, the A component comprising a material capable of electrochemically occluding and releasing lithium ions, the B component being sulfur-modified cellulose, and the B component being contained in an amount of 0.01 mass % or more based on 100 mass % of the total amount of the A component and the B component.
    Type: Application
    Filed: July 23, 2018
    Publication date: August 6, 2020
    Applicants: DAI-ICHI KOGYO SEIYAKU CO., LTD., NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
    Inventors: Takashi MUKAI, Yuta IKEUCHI, Masahiro YANAGIDA, Yasuteru SAITOU, Ayano SOFUE, Tetsuya HIGASHIZAKI
  • Patent number: 10717210
    Abstract: A release agent for vulcanized rubber molding is provided which has excellent mold releasing properties and washability. This release agent for vulcanized rubber molding contains an alkylene oxide adduct (A) of an amine compound having 4-8 active hydrogen atoms in the molecule, wherein the aforementioned alkylene oxide adduct (A) of an amine compound has a number average molecular weight of 5000-30000, and contains 50-95 mass % of an oxyethylene group.
    Type: Grant
    Filed: April 26, 2017
    Date of Patent: July 21, 2020
    Assignee: DAI-ICHI KOGYO SEIYAKU CO., LTD.
    Inventors: Takuya Horie, Toshikazu Nabeshima, Kazunori Nakagawa