Patents Assigned to DKS Co. Ltd.
  • Publication number: 20240052088
    Abstract: Provided is a two-component-curable polyurethane resin composition that has high compatibility, high adhesion, and a good low-dielectric-constant characteristic. A two-component-curable polyurethane resin composition according to an embodiment includes a first component including a polyol and a terpene resin, and a second component including a polyisocyanate, wherein the polyol includes 30 mass % or more of a polybutadiene polyol and/or a hydrogenated polybutadiene polyol, and a content of the terpene resin relative to 100 parts by mass of the polyol is 1 to 60 parts by mass.
    Type: Application
    Filed: February 16, 2022
    Publication date: February 15, 2024
    Applicant: DKS Co. Ltd.
    Inventors: Kazuhito TAKADA, Azusa KANAI
  • Publication number: 20240047742
    Abstract: Techniques relating to an electrolyte having high ion conductivity and high strength are provided. The electrolyte includes an ionic liquid, an inorganic oxide, and a binder, wherein the binder is formed from raw materials that are a polycarbonate polyol and a polyisocyanate, and the binder includes, at an end, at least one functional group selected from the group consisting of a trialkoxysilyl group having 1 to 4 carbon atoms, an epoxy group, and an oxetanyl group.
    Type: Application
    Filed: December 20, 2021
    Publication date: February 8, 2024
    Applicant: DKS CO. LTD.
    Inventors: Junshi OKUHARA, Fumiya KANEKO
  • Publication number: 20240025137
    Abstract: Provided is a manufacturing method for efficiently manufacturing a thermoplastic resin composite containing a thermoplastic resin and a fiber by pultrusion. In the manufacturing method according to an embodiment, fibers 10 are continuously impregnated with a thermoplastic resin-forming composition containing an active hydrogen component and a diisocyanate component, after impregnation, the fibers 10 are caused to pass through a heat-molding unit 30 to perform polymerization of a thermoplastic resin and molding of a thermoplastic resin composite 12, and the thermoplastic resin composite 12 is continuously pulled out from the heat-molding unit 30. In the method, a heating temperature of the heat-molding unit 30 is set to be lower than a glass transition temperature of the thermoplastic resin, so that the thermoplastic resin of the thermoplastic resin composite 12 pulled out from the heat-molding unit 30 is in a glassy state.
    Type: Application
    Filed: November 12, 2021
    Publication date: January 25, 2024
    Applicant: DKS Co. Ltd.
    Inventors: Norio HIRAYAMA, Tadashi TAKEKAWA, Yoshinori YAMADA, Yudai SHIOJI
  • Publication number: 20230406996
    Abstract: Provided is a technique that provides high durability and high flexibility at low temperatures. A polyurethane resin composition is produced by chain-extending, using polyamine, a reaction product between a polyol including at least one polyether polyol of polytetramethylene ether glycol or polypropylene glycol, 1,10-decanediol, and a polyol including an anionic hydrophilic group, and polyisocyanate.
    Type: Application
    Filed: January 31, 2022
    Publication date: December 21, 2023
    Applicant: DKS Co. Ltd.
    Inventors: Fumiya KANEKO, Takuma NISHIMURA, Shinya MIZUKAMI
  • Patent number: 11831040
    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: Grant
    Filed: August 20, 2019
    Date of Patent: November 28, 2023
    Assignee: DKS Co. Ltd.
    Inventors: Akiyoshi Nishikawa, Tetsuya Higashizaki, Mana Ishino, Tadashi Takekawa, Toshikazu Akao
  • Publication number: 20230263719
    Abstract: Provided is a viscous aqueous composition that has high transparency and high thickening performance, has high emulsifying power for oil-based raw material, or exerts strongly, in the case of being mixed with a water-miscible organic solvent, a viscosity retention effect. A viscous aqueous composition according to an embodiment includes (a) an anion-modified cellulose fiber including anionic groups forming salts with monoamines, and including, as the monoamines, a monoamine (A) having, in an organic conceptual diagram, an organic value of 200 or more and a monoamine (B) having an organic value of less than 200, and (b) water.
    Type: Application
    Filed: September 21, 2021
    Publication date: August 24, 2023
    Applicant: DKS Co. Ltd.
    Inventors: Akiyo KUBOTA, Yosuke GOI
  • Publication number: 20230261196
    Abstract: A technique relating to a binder having high workability while retaining binding properties is provided. An electrode binder composition includes an aqueous polyurethane resin dispersion in which a polyurethane resin is dispersed in water, a carbon nanotube, and a surfactant. The surfactant includes at least one selected from the group consisting of nonionic surfactants, silicon-based surfactants, and fluorine-based surfactants, and a content of the surfactant is 0.1 mass % or more and 20 mass % or less relative to a total amount of the polyurethane resin, the carbon nanotube, and the surfactant.
    Type: Application
    Filed: October 6, 2021
    Publication date: August 17, 2023
    Applicant: DKS Co. Ltd.
    Inventors: Masaaki MATSUMOTO, Akiyoshi NISHIKAWA, Koichi SAKAMOTO, Tetsuya HIGASHIZAKI
  • Publication number: 20230216056
    Abstract: A technology related to a binder that exhibits good ionic conductivity, binding properties, and discharge retention rate is provided. An aqueous polyurethane resin dispersion for binders that are used in lithium secondary batteries is an aqueous polyurethane resin dispersion including a polyurethane resin dispersed in water, the polyurethane resin being obtained by reacting a polyisocyanate compound (a), a compound (b) having two or more active hydrogen groups, a compound (c) having a hydrophilic group and one or more active hydrogen groups, and a chain extender (d) . The compound (b) contains a polyolefin (b1) having two or more active hydrogen groups and a polycarbonate (b2) having two or more active hydrogen groups and having 6 or less consecutive carbon atoms. A crosslink density per molecular weight of 1,000 of a resin solid component contained in the aqueous polyurethane resin dispersion is 0.02 mol/kg or more and 0.28 mol/kg or less.
    Type: Application
    Filed: October 6, 2021
    Publication date: July 6, 2023
    Applicant: DKS CO. LTD.
    Inventors: Ayano SOFUE, Fumiya KANEKO, Toshiya WATANABE, Yasuteru SAITO, Soki KAJI
  • Publication number: 20230207889
    Abstract: Provided is a technique with high strength, superior ionic conductivity, and superior electrical characteristics. A lithium ion secondary battery includes a positive electrode, a negative electrode, and a polymer electrolyte. The polymer electrolyte contains a lithium salt, an ionic liquid, and a polymer. The ionic liquid contains a bis(fluorosulfonyl)imide anion as an anion component. The content of the lithium salt is 2 mol/kg or more and 6 mol/kg or less based on the sum of the content of the ionic liquid and the content of the polymer. The content of the polymer is 25% by mass or more and 40% by mass or less based on the sum of the content of the ionic liquid and the content of the polymer.
    Type: Application
    Filed: March 9, 2021
    Publication date: June 29, 2023
    Applicant: DKS CO. LTD.
    Inventors: Yuji HOSHIHARA, Akiyoshi NISHIKAWA, Tetsuya HIGASHIZAKI, Soki KAJI
  • Publication number: 20230134720
    Abstract: A technology which exhibits a low internal resistance and good output characteristics is provided. An aqueous polyurethane resin dispersion for a secondary battery separator includes an aqueous polyurethane resin dispersion containing a polyurethane resin dispersed in water, the polyurethane resin being obtained by reacting a polyol, a polyisocyanate compound, and a chain extender. The polyol contains a polycarbonate polyol. The polyurethane resin has a crosslink density of 0.02 mol/kg or more and 0.28 mol/kg or less.
    Type: Application
    Filed: March 9, 2021
    Publication date: May 4, 2023
    Applicant: DKS Co. Ltd.
    Inventors: Akiyoshi NISHIKAWA, Tetsuya HIGASHIZAKI, Ayano SOFUE, Toshiya WATANABE, Fumiya KANEKO
  • Publication number: 20230106336
    Abstract: A technique that can improve ionic conductivity is provided. An electrolyte includes an inorganic composite particle that is a composite of an inorganic particle with a compound having a betaine structure and one or more functional groups selected from a (meth)acryloxy group, a Si(OR)3 group (R is a hydrogen atom or an alkyl group having 1 to 3 carbon atoms), and an Al(OR)2 group (R is a hydrogen atom or an alkyl group having 1 to 3 carbon atoms).
    Type: Application
    Filed: March 15, 2021
    Publication date: April 6, 2023
    Applicant: DKS Co. Ltd.
    Inventors: Soki KAJI, Yasuteru SAITO
  • Publication number: 20230100493
    Abstract: Provided is a technology for exhibiting good ant ithrombogenicity. A polyurethane or polyurethane urea has a graft chain having a specific structure. Two functional groups included in the specific structure are each an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 12 carbon atoms, or an aralkyl group having 7 to 20 carbon atoms and may be the same or different from each other.
    Type: Application
    Filed: January 13, 2021
    Publication date: March 30, 2023
    Applicant: DKS Co. Ltd.
    Inventors: Takuma NISHIMURA, Masahito NISHIURA
  • Publication number: 20230089518
    Abstract: Provided are a flame retardant composition for expandable styrene resin with which an extrusion-foamed molded article having excellent flame retardancy and excellent heat resistance can be produced; a styrene-based resin composition; and an extrusion-foamed molded article of the styrene-based resin composition. The flame retardant composition for expandable styrene resin of the present invention comprises at least B1) tetrabromobisphenol A-bis(2,3-dibromo-2-methylpropyl ether), (C) a zinc-modified hydrotalcite, and (D) a phosphoric acid ester-based compound, the component (B1) being contained in an amount of 10 to 98 mass % based on the total amount of the component (B1) and the component (D).
    Type: Application
    Filed: March 3, 2021
    Publication date: March 23, 2023
    Applicant: DKS Co. Ltd.
    Inventors: Ken MORISHITA, Koichi AKIYAMA
  • Publication number: 20220389045
    Abstract: To culture cells in a suspended state and easily recover the cultured cells. An additive for suspension culture according to an embodiment is a medium additive which is added to a medium for culturing cells in suspension, the medium additive containing a cellulose oligomer. A medium composition according to an embodiment is a medium composition capable of culturing cells in suspension, the medium composition containing a cellulose oligomer. A cell culture method according to an embodiment includes culturing cells in the medium composition.
    Type: Application
    Filed: October 23, 2020
    Publication date: December 8, 2022
    Applicants: DKS CO. LTD., TOKYO INSTITUTE OF TECHNOLOGY
    Inventors: Takeshi SERIZAWA, Toshiki SAWADA, Masahito NISHIURA, Rina MURASE
  • 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: 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: 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: 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