Patents Assigned to Kuraray Co., Ltd.
  • Patent number: 11746263
    Abstract: An aqueous emulsion may include: an ethylene-vinyl alcohol copolymer (A) as a dispersant; and a polymer (B) containing an unsaturated ethylenic monomer unit as a dispersoid, wherein the ethylene-vinyl alcohol copolymer (A) has a content of ethylene units of 1 mol % or more and less than 20 mol % and a block character of the ethylene units from 0.90 to 0.99. The aqueous emulsion may contain the ethylene-vinyl alcohol copolymer (A), as a dispersant, having a specific structure and is thus excellent in storage stability at low temperatures and water-resistant adhesiveness.
    Type: Grant
    Filed: July 6, 2020
    Date of Patent: September 5, 2023
    Assignee: KURARAY CO., LTD.
    Inventors: Yoriko Imaoka, Tatsuya Tanida
  • Publication number: 20230271132
    Abstract: One aspect of the present invention is an acidic gas separation device including: an electrolyte layer; a pair of electrodes provided with the electrolyte layer interposed between the pair of electrodes; and a voltage application unit that applies a voltage between the pair of electrodes, wherein the pair of electrodes are gas permeable electrodes, and the electrolyte layer contains: at least one selected from the group consisting of high molecular weight redox compounds having a radicalization rate of 90% or more, high molecular weight redox compounds having a quinone group in a molecule, and high molecular weight redox compounds having an imino group in a molecule; and a nonvolatile electrolytic solution.
    Type: Application
    Filed: June 30, 2021
    Publication date: August 31, 2023
    Applicant: KURARAY CO.,LTD.
    Inventors: Momotaro KANNO, Yoshihisa INUl, Hideharu IWASAKI
  • Publication number: 20230272205
    Abstract: The present invention relates to a resin composition containing a modified hydrogenated product (A) of a block copolymer containing a polymer block (A-1) having a structural unit derived from an aromatic vinyl compound and a polymer block (A-2) having a structural unit derived from a conjugated diene compound, and a polyolefin resin (B), wherein the modified hydrogenated product (A) has one or two or more functional groups selected from an alkoxysilyl group, a carboxy group, an amino group, a hydroxy group, an epoxy group, and a group derived from an acid anhydride, and the polymer block (A-2) has a vinyl bond amount of 50 to 99 mol %; and the resin composition further containing a polar resin (C).
    Type: Application
    Filed: May 9, 2023
    Publication date: August 31, 2023
    Applicant: KURARAY CO., LTD.
    Inventors: Masahiro KATO, Yasushi SENDA, Ryo SATANI
  • Publication number: 20230272125
    Abstract: The present invention provides a modified liquid diene rubber that is capable of giving a crosslinked product with excellent adhesion evaluated in terms of shear bond strength, a rubber composition including the modified liquid diene rubber, and a sealing material obtained from the rubber composition. A modified liquid diene rubber (A) has a functional group (a) derived from an acid anhydride, and contains butadiene units in an amount of 50 mass % or more based on the total monomer units, and the polystyrene-equivalent weight average molecular weight (Mw) measured by gel permeation chromatography (GPC) is in the range of 5,000 to 50,000.
    Type: Application
    Filed: May 12, 2021
    Publication date: August 31, 2023
    Applicant: KURARAY CO., LTD.
    Inventors: Yoshikazu UENO, Yosuke UEHARA, Nana MOMOI
  • Publication number: 20230271881
    Abstract: The present invention relates to a layered formed sheet comprising two or more formed sheets each formed from a curable composition comprising (A) an aluminosilicate source, (B) an alkaline metal hydroxide, (C) cellulose-based fibers and (D) alkali-resistant fibers other than cellulose-based fibers, in which the aluminosilicate source (A) comprises a blast furnace slag, and the content of a blast furnace slag having a specific surface area of 1000 cm2/g or more and 9000 cm2/g or less is more than 55% by mass and 90% by mass or less related to a total solid content in the curable composition.
    Type: Application
    Filed: June 28, 2021
    Publication date: August 31, 2023
    Applicant: KURARAY CO., LTD.
    Inventors: Yoshinori HITOMI, Akira IMAGAWA, Takafumi HORIKOSHI, Atsuhisa OGAWA, Yoshihiro IWASAKI, Hisashi SUEMORI, Yoshihiro HIGASHIMOTO
  • Patent number: 11738547
    Abstract: A gas permeable layer is formed from an ethylene-vinyl alcohol copolymer resin composition comprising an ethylene-vinyl alcohol copolymer (A), a polyolefin (B), and an acid-modified ethylene-?-olefin copolymer (C).
    Type: Grant
    Filed: September 10, 2021
    Date of Patent: August 29, 2023
    Assignee: Kuraray Co., Ltd.
    Inventors: Edgard Chow, Emilio Morales, Wataru Hirose
  • Patent number: 11739187
    Abstract: Provided are a resin composition, a production method thereof, and a molded product and a multilayer structure each including such a resin composition. The resin composition enables: even in the case in which a film formation temperature is high, excessive elevation of torque to be inhibited with occurrence of neck-in during film formation being prevented; a molded product superior in appearance characteristics to be formed continuously for a long time period, with defects such as fish eyes and streaks being prevented; and further a thermoformable multilayer structure to be produced continuously for a long time period, the thermoformable multilayer structure being capable of providing a thermoformed product superior in appearance characteristics.
    Type: Grant
    Filed: December 27, 2018
    Date of Patent: August 29, 2023
    Assignee: KURARAY CO., LTD.
    Inventors: Tatsuya Hasegawa, Hiroshi Kawai, Mizuko Oshita
  • Publication number: 20230265271
    Abstract: A polypropylene-based resin composition, a hydrogenated block copolymer contained in the polypropylene-based resin composition, a molded article containing the polypropylene-based resin composition, and an interior-exterior decorative material for automobiles, which includes the molded article. The polypropylene-based resin composition contains a polypropylene-based polymer (A), an ethylene-?-olefin copolymer rubber (B), and a hydrogenated block copolymer (C). In the polypropylene-based resin composition, the hydrogenated block copolymer (C) is a hydrogenated product of a block copolymer having at least one polymer block (C-1) mainly composed of an aromatic vinyl compound unit, and having at least one polymer block (C-2) mainly composed of a butadiene (Bd) unit and an isoprene (Ip) unit, a content of the aromatic vinyl compound units in the hydrogenated block copolymer is less than 30% by mass, and a vinyl bond amount of the polymer block (C-2) is 20% or less.
    Type: Application
    Filed: July 29, 2021
    Publication date: August 24, 2023
    Applicant: KURARAY CO., LTD.
    Inventors: Takahiro SEKIGUCHI, Yasushi SENDA
  • Patent number: 11731880
    Abstract: A carbonaceous material may have a high capacitance per volume as well as a high durability, and/or may have a BET specific surface area is 1,500 to 1,900 m2/g, an average pore size is 1.84 to 2.05 nm at a nitrogen relative pressure P/P0 of 0.93 in a nitrogen adsorption isotherm measured at 77.4 K, a ratio of pore volume having a pore size of 3 nm or smaller, determined by the BJH method, is 65 to 90% relative to total pore volume calculated based on a nitrogen adsorption amount at a relative pressure P/P0 of 0.93 in the nitrogen adsorption isotherm, and a ratio of pore volume having a pore size of 1 to 2 nm, determined by the MP method, is 10 to 20% relative to total pore volume calculated based on the nitrogen adsorption amount at a relative pressure P/P0 of 0.93 in the nitrogen adsorption isotherm.
    Type: Grant
    Filed: July 17, 2019
    Date of Patent: August 22, 2023
    Assignee: KURARAY CO., LTD.
    Inventors: Yumika Nishita, Hiroyuki Nishinami, Shushi Nishimura
  • Publication number: 20230257174
    Abstract: [Problem to be solved] To provide a water-soluble film capable of suppressing formation of holes when used as a package while maintaining water solubility, and a package using such a water-soluble film. [Solution] A water-soluble film containing a polyvinyl alcohol resin, wherein within a square A1 with a side of 1 cm or more and 5 cm or less positioned at an arbitrary location on at least one surface of the water-soluble film, each side of an area of square A2 with a side of 5 ?m is divided into 64 to divide the entire area into 4096 pixels, and when elastic moduli of the pixels are measured by an atomic force microscope, a number average value of the elastic moduli of the pixels is 1 to 200 MPa, and a coefficient of variation of the elastic moduli of the pixels is 0.1 to 0.7.
    Type: Application
    Filed: June 14, 2021
    Publication date: August 17, 2023
    Applicant: KURARAY CO., LTD.
    Inventors: Minoru Okamoto, Sayaka Shimizu, Osamu Kazeto
  • Publication number: 20230261195
    Abstract: The present disclosure provides a binder for electricity storage device electrodes, said binder containing a polyvinyl alcohol resin and an electrolyte solution-swellable resin.
    Type: Application
    Filed: June 15, 2021
    Publication date: August 17, 2023
    Applicant: KURARAY CO., LTD.
    Inventors: Kengo Tachikawa, Yoshihisa Inui
  • Publication number: 20230257534
    Abstract: [Problem to be solved] To provide a water-soluble film capable of which is excellent in water solubility and less likely to cause problems such as breakage of packaging material during storage and transportation by controlling the crystal long period structure of the PVA molecule and, for example, the degree of phase separation state between PVA and other components in the water-soluble film.
    Type: Application
    Filed: June 14, 2021
    Publication date: August 17, 2023
    Applicant: KURARAY CO., LTD.
    Inventors: Minoru Okamoto, Sayaka Shimizu, Osamu Kazeto
  • Publication number: 20230257535
    Abstract: [Problem to be solved] To provide a water-soluble film excellent in high-speed heat-sealing property while maintaining excellent solubility in water, and a package using the same. [Solution] A water-soluble film of the present invention is a water-soluble film containing a polyvinyl alcohol resin, wherein after conditioning the water-soluble film at a temperature of 20° C. and a relative humidity of 60% for 24 hours, a first melting temperature Tm1 obtained from a melting curve when the temperature of the water-soluble film is raised to 200° C. at 500° C./sec and a second melting temperature Tm2 obtained from a melting curve when the temperature of the water-soluble film is cooled to 0° C. at 100° C./sec after a temperature rise and the temperature of the water-soluble film is again raised to 200° C. at 100° C./sec satisfy relationships of the following formulas (1) and (2). 105° C.?Tm1?165° C.??(1) Tm2?Tm1?20° C.
    Type: Application
    Filed: June 14, 2021
    Publication date: August 17, 2023
    Applicant: KURARAY CO., LTD.
    Inventors: Minoru Okamoto, Sayaka Shimizu, Osamu Kazeto
  • Publication number: 20230257536
    Abstract: [Problem to be solved] To provide a water-soluble film having good transparency and good releasability from a support with less surfactant content. [Solution] A water-soluble film containing a polyvinyl alcohol resin and surfactant, wherein a content of the surfactant is 0.005 to 1 parts by mass with respect to 100 parts by mass of the polyvinyl alcohol resin, and a ratio S(0)/S(32) of an abundance amount S(0) of the surfactant on at least one surface of the water-soluble film to an abundance amount S(32) of the surfactant on a cross-section surface at a depth of 32 nm from the at least one surface of the water-soluble film, measured by a count number of fragment ions derived from the surfactant detected by time-of-flight secondary ion mass spectrometry on the at least one surface of the water-soluble film, is in the range of 100 to 500.
    Type: Application
    Filed: June 14, 2021
    Publication date: August 17, 2023
    Applicant: KURARAY CO., LTD.
    Inventors: Minoru Okamoto, Sayaka Shimizu, Osamu Kazeto
  • Publication number: 20230257491
    Abstract: [Problem to be solved] To provide a traceable vinyl acetate, a polymer containing the vinyl acetate, and a vinyl alcohol polymer which is a saponified product of the polymer. [Solution] Vinyl acetate having a ratio of carbon-14 to total carbon of 1.0×10?4 or more, a vinyl acetate polymer containing the vinyl acetate as a monomer unit and a vinyl alcohol polymer obtained by saponifying the vinyl acetate polymer.
    Type: Application
    Filed: June 30, 2021
    Publication date: August 17, 2023
    Applicant: KURARAY CO., LTD.
    Inventors: Yasutaka Inubushi, Keishi Hachiya, Masaki Kato, Yoshikazu Yamasaki, Makoto Okamoto, Kazuyuki Somemiya, Takafumi Izawa
  • Publication number: 20230250245
    Abstract: [Problem to be solved] To provide a water-soluble film that is excellent in high-speed printability and moisture resistance. [Solution] A water-soluble film containing a polyvinyl alcohol resin, wherein the water-soluble film has a surface on at least one side in which an abundance ratio of carbon-oxygen single bond (C—O) in all carbon element bonds obtained by X-ray photoelectron spectroscopy is in the range of 75 to 85%.
    Type: Application
    Filed: June 14, 2021
    Publication date: August 10, 2023
    Applicant: KURARAY CO., LTD.
    Inventors: Minoru Okamoto, Sayaka Shimizu, Osamu Kazeto
  • Publication number: 20230250269
    Abstract: Provided are: a gas barrier resin composition having sufficient long-run workability and superior gas barrier properties which compare favorably to those of fossil fuel-derived resins, while containing a biomass-derived raw material; a multilayer structure in which the gas barrier resin is used; and a method for producing such a gas barrier resin composition. The gas barrier resin composition contains at least one type of saponified ethylene-vinyl ester copolymer, wherein of ethylene and a vinyl ester, which are raw materials of the at least one type of saponified ethylene-vinyl ester copolymer, a part is derived from biomass, and a remainder is derived from a fossil fuel.
    Type: Application
    Filed: June 29, 2021
    Publication date: August 10, 2023
    Applicant: KURARAY CO., LTD.
    Inventors: Masakazu Nakaya, Mizuko Oshita
  • Publication number: 20230250023
    Abstract: The present invention relates to a cured composite comprising (A) an aluminosilicate source, (B) an alkali activator and (C) alkali-resistant fibers, in which: the aluminosilicate source (A) contains a blast furnace slag, in which the content of the blast furnace slag is 40% by mass or more relative to a total solid content in the aluminosilicate source (A); the content of the alkali activator (B) is 10% by mass or less relative to a total solid content in the curable composition; and the water content in the cured composite is 10.0% by mass or less relative to a total mass of the cured composite.
    Type: Application
    Filed: June 28, 2021
    Publication date: August 10, 2023
    Applicant: KURARAY CO., LTD.
    Inventors: Takafumi HORIKOSHI, Akira IMAGAWA, Yoshihiro IWASAKI, Hisashi SUEMORI, Atsuhisa OGAWA, Yoshihiro HIGASHIMOTO
  • Patent number: 11718074
    Abstract: A film with a gas barrier resin having a glass transition temperature of 70° C. or below and an elastomer, and having an oxygen permeability coefficient of 200 mL/(m2·day·atm) or less. In a case where tension is applied to stretch the film in a machine direction (MD) at 20° C. such that a twofold increase in length of the film is kept for 30 seconds, and then the tension is released, a ratio L2/L1 is 1.5 or less, where L1 denotes the length of the film prior to application of the tension and L2 denotes the length of the film subsequent to release of the tension. An elongation ratio at break ETD/EMD of the film is preferably 0.9 or more and 1.7 or less, there EMD denotes the elongation at break in MD and ETD denotes the elongation at break in the transverse direction (TD).
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: August 8, 2023
    Assignee: KURARAY CO., LTD.
    Inventors: Yasuhiro Nonaka, Makoto Suzuki
  • Patent number: 11718718
    Abstract: Provided is an expansive refractory material that not only has excellent fire resistance but also can provide a heat insulating function for protecting a content by expanding to form a heat insulating layer when the refractory material is brought close to a heat source or comes into contact with flame. The refractory material at least includes: discontinuous reinforcing fibers having a thermal conductivity of 4 W/(m·K) or higher; and a flame-retardant thermoplastic resin, wherein the discontinuous reinforcing fibers are dispersed in the refractory material. The refractory material has a post-expansion porosity of 30% or higher.
    Type: Grant
    Filed: May 19, 2020
    Date of Patent: August 8, 2023
    Assignee: KURARAY CO., LTD.
    Inventors: Satoshi Katsuya, Yosuke Washitake, Ryokei Endo, Shunsuke Suiko