Patents Assigned to DKS Co. Ltd.
  • Publication number: 20220372220
    Abstract: Provided is a surfactant composition that can impart good polymerization stability, that can yield an aqueous resin dispersion having good wettability, and that can improve water resistance and water-resistant adhesive strength of a resin film formed from the aqueous resin dispersion. The surfactant composition according to the present invention includes a compound C1 represented by formula (1): (in formula (1), A1 represents an alkylene group having 10 to 14 carbon atoms, A2 represents an alkylene group having 2 to 4 carbon atoms, n is an average number of moles of an oxyalkylene group A2O added and is a number of 1 to 100, and X represents a hydrogen atom, a sulfate ester or a salt thereof, a phosphate ester or a salt thereof, or methylcarboxylic acid or a salt thereof); and a compound C2 represented by formula (2): (in formula (2), A1, A2, n, and X are as defined in formula (1)). A molar ratio C1/C2 of the compound C1 to the compound C2 is 99/1 to 84/16.
    Type: Application
    Filed: September 23, 2020
    Publication date: November 24, 2022
    Applicant: DKS Co. Ltd.
    Inventors: Masatake JOYABU, Kei SHIOHARA, Asako OGASAWARA, Takuro KIMURA, Chi TAO
  • Patent number: 11492418
    Abstract: Provided is a novel cyclic oligosaccharide derived from cellulose. The cyclic oligosaccharide is a cyclic oligosaccharide of Formula (1) having a ?-1,4 glucosidic bond. In the formula, R represents a hydrogen atom or a substituent thereof, a plurality of the Rs may be identical or different, and n represents an integer of 0 to 3.
    Type: Grant
    Filed: October 8, 2019
    Date of Patent: November 8, 2022
    Assignees: OSAKA UNIVERSITY, DKS CO. LTD.
    Inventors: Toshiyuki Kida, Masahito Nishiura
  • Publication number: 20220231380
    Abstract: The safety of an assembled battery is improved. An insulating sheet 10 is to be interposed between battery cells 20 having planar surfaces 34 facing each other and is formed of a resin composition containing an inorganic filler. An assembled battery 50 includes a plurality of battery cells 20 having planar surfaces 34 and the insulating sheet 10. The insulating sheet 10 is interposed in at least one facing section 36 of the plurality of battery cells 20 whose planar surfaces 34 are arranged to face each other.
    Type: Application
    Filed: August 20, 2019
    Publication date: July 21, 2022
    Applicant: DKS Co. Ltd.
    Inventors: Akiyoshi NISHIKAWA, Tetsuya HIGASHIZAKI, Mana ISHINO, Tadashi TAKEKAWA, Toshikazu AKAO
  • Publication number: 20220200003
    Abstract: Provided are an electrode binder composition that provides an electrode that exhibits high durability even when an active material that shows a large volume change is used, a power storage device electrode produced using the electrode binder composition, and a power storage device including the power storage device electrode. An electrode binder composition contains (A) one or more polymers selected from the group consisting of fluoropolymers, butadiene polymers, and thermoplastic elastomers, (B) a fibrous nanocarbon material having an average fiber diameter of 0.5 nm or more and 20 nm or less and a fiber length of 0.5 ?m or more and 1 mm or less, (C) a cellulose material, (D) a nanocellulose fiber, and (E) water. The mass ratio between (A) and (B) is (A)/(B)=60/40 to 98/2.
    Type: Application
    Filed: March 5, 2020
    Publication date: June 23, 2022
    Applicant: DKS Co. Ltd.
    Inventors: Ayano SOFUE, Toshiya WATANABE, Yasuteru SAITO
  • Publication number: 20220200001
    Abstract: Provided are an electrode binder composition that provides an electrode that exhibits high durability even when an active material that shows a large volume change is used, an electrode coating liquid composition containing the electrode binder composition, a power storage device electrode including an electrode mixture layer containing a solid of the electrode coating liquid composition, and a power storage device including the power storage device electrode. An electrode binder composition includes (A) a polyurethane, (B) a fibrous nanocarbon material having an average fiber length of 0.5 ?m or more, and (C) water. The polyurethane is obtained by reacting together (a) a polyisocyanate, (b) a polyol, (c) a compound having one or more active hydrogen groups and a hydrophilic group, and (d) a chain extender. (b) contains an olefinic polyol having 1.5 or more active hydrogen groups and/or a carbonate diol having less than 6 carbon atoms between carbonate bond chains.
    Type: Application
    Filed: March 5, 2020
    Publication date: June 23, 2022
    Applicant: DKS Co. Ltd.
    Inventors: Ayano SOFUE, Toshiya WATANABE, Yasuteru SAITO
  • Publication number: 20220185942
    Abstract: Provided are an aqueous polyurethane dispersion and a coating agent including the same, which can produce a coating film with excellent balance of various physical properties and especially excellent self-restoring properties. It is the aqueous polyurethane dispersion in which a polyurethane (C) obtained by reacting a urethane prepolymer (A) obtained by reacting a polyisocyanate (a), a polyol (b), and a hydrophilic group-containing polyol (c) with a chain extender (B) is dispersed in water, the urethane prepolymer (A) having a weight average molecular weight of 2,000 or more and 30,000 or less, the polyurethane (C) having a degree of crosslinking of 0.03 mol/kg or more and 0.15 mol/kg or less, the polyurethane (C) having a urea content of 0.5 mol/kg or less.
    Type: Application
    Filed: March 13, 2020
    Publication date: June 16, 2022
    Applicant: DKS CO. LTD.
    Inventor: Toshiya WATANABE
  • Publication number: 20220160933
    Abstract: An object is to provide a subcutaneous or submucosal expansion agent that not only has superior expansion properties to those of conventional agents, and maintains the expanded state for a relatively long period of time, but also ensures sufficient administration properties. The subcutaneous or submucosal expansion agent is injected into a subcutaneous or submucosal space to expand the subcutaneous or submucosal space, and comprises cellulose fibers (A) containing anionically modified cellulose, and water (B).
    Type: Application
    Filed: March 2, 2020
    Publication date: May 26, 2022
    Applicants: DKS Co. Ltd.
    Inventors: Toshiyuki MORISAWA, Takayuki HAYASHI, Yosuke GOI, Takazumi TAWA
  • Publication number: 20220049237
    Abstract: This invention provides a novel carrier for enzyme immobilization and an immobilized enzyme. The carrier for enzyme immobilization according to an embodiment comprises a porous material and cellulose that has an amino group-containing substituent at an anomeric position and is immobilized on the porous material. The immobilized enzyme contains the carrier for enzyme immobilization and an enzyme immobilization on the cellulose. The carrier for enzyme immobilization is obtained by adding an acid to an aqueous solution in which cellulose having an amino group-containing substituent at an anomeric position is dissolved in an aqueous alkaline solution to deposit the cellulose in the presence of a porous material. The immobilized enzyme is obtained by immobilizing an enzyme on the cellulose.
    Type: Application
    Filed: October 17, 2019
    Publication date: February 17, 2022
    Applicants: TOKYO INSTITUTE OF TECHNOLOGY, DKS Co. Ltd.
    Inventors: Takeshi SERIZAWA, Toshiki SAWADA, Masahito NISHIURA
  • Publication number: 20220041758
    Abstract: Provided is a novel cyclic oligosaccharide derived from cellulose. The cyclic oligosaccharide is a cyclic oligosaccharide of Formula (1) having a ?-1,4 glucosidic bond. In the formula, R represents a hydrogen atom or a substituent thereof, a plurality of the Rs may be identical or different, and n represents an integer of 0 to 3.
    Type: Application
    Filed: October 8, 2019
    Publication date: February 10, 2022
    Applicants: OSAKA UNIVERSITY, DKS CO. LTD.
    Inventors: Toshiyuki KIDA, Masahito NISHIURA
  • Publication number: 20210328291
    Abstract: A high-quality battery pack is efficiently produced without using any potting material. A battery cover sheet 10 is a sheet member formed of a resin composition containing an inorganic filler, and has flexibility enough to cover, along the shape of the outer surface of a battery (such as a cylindrical lithium-ion battery 20A), at least partially the outer surface. For example, of the outer surface of the cylindrical lithium-ion battery 20A except for both end surfaces, the outer peripheral surface is covered with the battery cover sheet 10 and a seam 10a is fixed with a fixing member such as an adhesive tape 11, to thereby form a sheet-covered battery 30A. In this case, the battery cover sheet 10 forms a battery holder.
    Type: Application
    Filed: September 9, 2019
    Publication date: October 21, 2021
    Applicant: DKS Co. Ltd.
    Inventors: Akiyoshi NISHIKAWA, Tetsuya HIGASHIZAKI, Mana ISHINO, Tadashi TAKEKAWA, Toshikazu AKAO
  • Publication number: 20210320365
    Abstract: Provided are a battery holder that enables efficient production of a high-quality battery pack, and a battery pack using the battery holder. A battery holder 10 at least includes a tubular body having a through-space (battery-housing portion 10a) for housing a battery such as a lithium-ion battery 20. This tubular body includes a fibrous substrate 11 and a resin composition 12 containing an inorganic filler.
    Type: Application
    Filed: August 20, 2019
    Publication date: October 14, 2021
    Applicant: DKS Co Ltd.
    Inventors: Akiyoshi NISHIKAWA, Tetsuya HIGASHIZAKI, Mana ISHINO, Takashi KITAGAWA, Toshikazu AKAO
  • Publication number: 20210277164
    Abstract: Provided is a surfactant composition having the capability of not only imparting excellent polymerization stability, but also imparting excellent mechanical stability to the aqueous resin dispersion to be obtained through emulsion polymerization, even when the amount of the surfactant composition used is small.
    Type: Application
    Filed: October 17, 2019
    Publication date: September 9, 2021
    Applicant: DKS Co. Ltd.
    Inventors: Takuro KIMURA, Masatake JOYABU