Patents Assigned to Kuraray Co., Ltd.
  • Publication number: 20240417332
    Abstract: A porous formed plate includes 35 to 70% by mass of a substance not involved in a pozzolanic reaction; 20 to 61.5% by mass of a cement; 1 to 3% by mass of synthetic fibers; and 2.5 to 7% by mass of a pulp, wherein, in a pore size distribution of the formed plate that is determined by a mercury intrusion method, a ratio (B)/(A) of a pore volume (B) in a range of 6 to 560 nm with respect to a pore volume (A) in a range of 660 to 9,100 nm is 1.70 to 6.0.
    Type: Application
    Filed: October 31, 2022
    Publication date: December 19, 2024
    Applicant: Kuraray Co., Ltd.
    Inventors: Yoshinori Hitomi, Akira Imagawa, Atsuhisa Ogawa, Satoshi Katsuya, Saburo Hada
  • Publication number: 20240417511
    Abstract: Provided is a liquid crystal polyester fiber that suppresses gas generation during heating and has excellent hue. The liquid crystal polyester fiber has a total amount of carboxy end groups (total CEG amount) of 5.0 mEq/kg or less and a ketone bond amount of 0.05 mol % or less. For example, the liquid crystal polyester fiber may have a melting point of 380° C. or lower. In addition, the liquid crystal polyester fiber may have a tenacity of lower than 18 cN/dtex. Moreover, the liquid crystal polyester fiber may contain a liquid crystal polyester having a structural unit derived from 4-hydroxybenzoic acid at a proportion of 50 mol % or more.
    Type: Application
    Filed: September 29, 2022
    Publication date: December 19, 2024
    Applicant: KURARAY CO., LTD.
    Inventors: Yukihiro TERAMOTO, Takuya TSUJIMOTO, Hideki KAMADA
  • Publication number: 20240413276
    Abstract: A leather-like light-emitting display device can include a leather-like sheet that is a laminate of a colored resin layer forming an outer surface layer, and a fiber substrate; a light-emitting portion disposed below the leather-like sheet; and a light-blocking portion configured to partially limit transmission of light, and interposed between any layers from the colored resin layer to the light-emitting portion. The leather-like light-emitting display device is configured to exhibit light-emitting display with a luminance Ya of 200 cd/m2 or less in a non-light emitting region corresponding to the light-blocking portion and a luminance Yb of 100 to 2,000 cd/m2 in a light-emitting region corresponding to a portion other than the light-blocking portion, both as measured from a surface of the colored resin layer, and Yb/Ya being 2.0 or more.
    Type: Application
    Filed: October 4, 2022
    Publication date: December 12, 2024
    Applicant: Kuraray Co., Ltd.
    Inventors: Daisuke Matsuda, Masato Warita, Norio Makiyama
  • Publication number: 20240409738
    Abstract: Provided is a resin composition containing a polylactic acid polymer and a ?-methyl-?-valerolactone polymer.
    Type: Application
    Filed: October 20, 2022
    Publication date: December 12, 2024
    Applicant: KURARAY CO., LTD.
    Inventors: Muneki ISHIO, Yuki SANO, Yusaku HOSAKA
  • Publication number: 20240409697
    Abstract: A polyamide block copolymer that includes: a polymer block (A) having 50 mol % or more of a constituent unit derived from polyamide; and a polymer block (B) having 50 mol % or more of a constituent unit derived from at least one of a polyether and a polyester, in which the polymer block (B) has a glass transition temperature of 20° C. or lower and the polyamide block copolymer has a melting point of 230° C. or higher.
    Type: Application
    Filed: October 26, 2022
    Publication date: December 12, 2024
    Applicant: KURARAY CO., LTD.
    Inventor: Daiki MINAMIGUCHI
  • Publication number: 20240409794
    Abstract: Provided is a creping adhesive that is favorable in a thread-forming property, wet adhesiveness, and the like. A creping adhesive contains a PVA (A), wherein at least one of (i) and (ii) below is satisfied. (i) The PVA (A) includes a PVA having a minimum degree of branching of 0.25 or more and 0.93 or less within a range of an absolute molecular weight being 200,000 or more and 800,000 or less, and a ratio Mw/Mn of a weight-average molecular weight Mw to a number-average molecular weight Mn of the PVA (A) is 2.5 or more. (ii) The ratio Mw/Mn of the weight-average molecular weight Mw to the number-average molecular weight Mn of the PVA (A) is 3.8 or more.
    Type: Application
    Filed: September 30, 2022
    Publication date: December 12, 2024
    Applicant: Kuraray Co., Ltd.
    Inventors: Yuta TAOKA, Misuzu FUJIMORI
  • Patent number: 12161991
    Abstract: The present invention relates to an activated carbon, having a pore volume (A) of 0.3 to 0.7 mL/g at a pore diameter of 6.5 to 50 nm as determined by mercury intrusion porosimetry, a pore volume (B) of 0.23 mL/g or less at a pore diameter of 750 to 4,000 nm as determined by mercury intrusion porosimetry, and a pore volume ratio (A)/(B) of 1.7 or higher.
    Type: Grant
    Filed: February 14, 2020
    Date of Patent: December 10, 2024
    Assignee: KURARAY CO., LTD.
    Inventors: Hiroaki Kitatomi, Mitsunori Nishita, Mitsunori Hitomi, Takayuki Yamada
  • Publication number: 20240400391
    Abstract: The present invention relates to a carbonaceous material having a nitrogen element content, measured by element analysis, of 1.0% by mass or more, and a phosphorus element content, measured by X-ray fluorescence analysis, of 0.5% by mass or more.
    Type: Application
    Filed: September 27, 2022
    Publication date: December 5, 2024
    Applicant: KURARAY CO., LTD.
    Inventors: Keiichi NISHIMURA, Naohiro NISHIMURA, Kosuke NISHIUMI
  • Publication number: 20240397851
    Abstract: The present invention relates generally to an aqueous seed coating composition based on a specific polyvinyl alcohol copolymer resin as a binder plus a hydrophobic pesticide additive, and seeds coated with such coating composition, which coated seeds have a desirable combination of bulk low dusting, bulk seed flowability and good germination characteristics.
    Type: Application
    Filed: August 9, 2024
    Publication date: December 5, 2024
    Applicant: KURARAY CO., LTD.
    Inventors: Ghebrehiwet GHEBREMESKEL, Masaki KATO, Levi NEUFELD
  • Publication number: 20240399530
    Abstract: A thermoplastic polyurethane for polishing layer, in which a D hardness after saturated and swollen by water of 50° C. in a sheet with a thickness of 2 mm is less than 50, and a contact angle with water in a sheet with a thickness of 200 ?m is 70° or less.
    Type: Application
    Filed: September 27, 2022
    Publication date: December 5, 2024
    Applicant: KURARAY CO., LTD.
    Inventors: Azusa SUNAYAMA, Yuko GOSHI, Mitsuru KATO
  • Publication number: 20240398961
    Abstract: A sterilized dry hydrogel-forming article containing a crosslinked product of a vinyl alcohol polymer having a bioactive substance conjugated thereto. A hydrogel containing a crosslinked product of a vinyl alcohol polymer having an ethylenically unsaturated group and a carboxy group and a bioactive substance having an amino group, the carboxy group of the crosslinked product and the amino group of the bioactive substance being covalently bound via an amide bond.
    Type: Application
    Filed: August 17, 2022
    Publication date: December 5, 2024
    Applicant: KURARAY CO., LTD.
    Inventors: Akio FUJITA, Satoru AYANO, Goro KOBAYASHI
  • Publication number: 20240399720
    Abstract: The present invention relates to a multilayer structure for storing or transporting a gas comprising hydrogen, wherein the multilayer structure comprises at least three layers comprising an inner layer comprising at least one first polymer, a middle layer comprising ethylene-vinyl alcohol copolymer, and an outer layer comprising at least one second polymer, and wherein the water-vapour transmission rate of the inner layer is lower than that of the outer layer. The multilayer structure has excellent hydrogen gas barrier properties. Therefore, the multilayer structure is suitable for a hydrogen storage vessel and a hydrogen transportation pipe.
    Type: Application
    Filed: September 16, 2022
    Publication date: December 5, 2024
    Applicant: Kuraray Co., Ltd.
    Inventors: Hiroyuki SHIMO, Yannick GEBOES, Naomi WINCKELMANS
  • Publication number: 20240399721
    Abstract: Present disclosure provides a multilayer structure including a layer structure (X) and a layer structure (Y) which are laminated via a water-soluble layer (A).
    Type: Application
    Filed: September 22, 2022
    Publication date: December 5, 2024
    Applicant: Kuraray Co., Ltd.
    Inventors: Satoshi ISHIUCHI, Kentaro YOSHIDA
  • Publication number: 20240383097
    Abstract: Disclosed is a polishing pad including a polishing layer that is a molded body of a polyurethane composition, wherein the polyurethane composition contains 90 to 99.9 mass % of a thermoplastic polyurethane including a non-alicyclic diisocyanate unit as an organic diisocyanate unit, and 0.1 to 10 mass % of a hygroscopic polymer, and the molded body has a hardness of 60 or more and less than 75, as measured with a type-D durometer compliant with JIS K 7215.
    Type: Application
    Filed: September 22, 2022
    Publication date: November 21, 2024
    Applicant: KURARAY CO., LTD.
    Inventors: Yuko GOSHI, Mitsuru KATO, Takashi SUGIOKA
  • Publication number: 20240384017
    Abstract: A polyvinyl alcohol resin containing a polyvinyl alcohol as a substantially sole polymer component, wherein the polyvinyl alcohol resin has: an absorbance Abs320 at an optical path length of 10 mm and a wavelength of 320 nm being 0.09 or more, when prepared into a 0.1% by mass aqueous solution; a ratio (Abs320/Abs370) of the absorbance Abs320 to an absorbance Abs370 at an optical path length of 10 mm and a wavelength of 370 nm being 4.9 or less, when prepared into the 0.1% by mass aqueous solution; and a total content of divalent metal elements and trivalent metal elements being less than 30 ?mol/g.
    Type: Application
    Filed: July 26, 2022
    Publication date: November 21, 2024
    Applicant: Kuraray Co., Ltd.
    Inventor: Kazuma FUJITA
  • Patent number: 12144402
    Abstract: A water-soluble male-type molded hook-and-loop fastener includes a substrate and a plurality of male-type engaging elements, arranged in rows, protruding from the substrate surface. The engaging elements have a shape rising from the substrate surface and curving mid-course in a row direction, or a shape rising from the substrate surface, branching forward and backward mid-course in the row direction and curving in the row direction, with tip portions oriented toward the substrate surface in either shape. The substrate and the engaging elements both contain a mixture of a polyvinyl alcohol, 5 to 30 parts by mass of a polyhydric alcohol- or ethylene oxide-based polymer, and 3 to 20 parts by mass of a layered inorganic particle, based on 100 parts by mass of the polyvinyl alcohol. The polyvinyl alcohol has a degree of polymerization of 300 to 700 and a degree of saponification of 60 to 80% by mole.
    Type: Grant
    Filed: February 26, 2021
    Date of Patent: November 19, 2024
    Assignees: KURARAY FASTENING CO., LTD., KURARAY CO., LTD.
    Inventors: Nobuhiro Koga, Hideki Kamada, Satoru Ono, Yoshikatsu Fujisawa
  • Publication number: 20240376006
    Abstract: A cement composition containing a fluid loss control agent and a cement, wherein the fluid loss control agent contains a vinyl alcohol polymer and a crosslinking agent, and a swelling percentage of the fluid loss control agent is 200% or more and 3,600% or less.
    Type: Application
    Filed: September 9, 2022
    Publication date: November 14, 2024
    Applicant: Kuraray Co., Ltd.
    Inventors: Takuma KANESHIMA, JungYong KIM, Ghebrehiwet GHEBREMESKEL, Keisuke MORIKAWA
  • Publication number: 20240375239
    Abstract: Disclosed is a polishing pad including a polishing layer that is a molded body of a polyurethane composition, wherein the polyurethane composition contains 90 to 99.9 mass % of a thermoplastic polyurethane including a non-alicyclic diisocyanate unit as an organic diisocyanate unit, and 0.1 to 10 mass % of a hygroscopic polymer, and the molded body has a hardness of 75 to 90, as measured with a type-D durometer compliant with JIS K 7215.
    Type: Application
    Filed: September 22, 2022
    Publication date: November 14, 2024
    Applicant: KURARAY CO., LTD.
    Inventors: Yuko GOSHI, Mitsuru KATO, Takashi SUGIOKA
  • Patent number: 12138891
    Abstract: A leather-like sheet includes: a fiber base material; an intermediate resin layer stacked on one surface of the fiber base material; and a surface resin layer stacked on the intermediate resin layer. The surface resin layer contains a polyether-based polyurethane and spherical fine particles having a heat resistance at 200° C., and has a content ratio of the spherical fine particles of 5 to 40 mass %. The spherical fine particles have a specific heat of 0.95 kJ/(kg·K) or more, a particle size D50 (median diameter) at a cumulative distribution of 50 vol %, of 2.5 to 10 ?m, and a particle size D10 at a cumulative distribution of 10 vol % of the spherical fine particles which satisfies a condition that a particle size dispersity D50/D10?3.
    Type: Grant
    Filed: December 3, 2020
    Date of Patent: November 12, 2024
    Assignee: KURARAY CO., LTD.
    Inventor: Masato Warita
  • Patent number: 12138615
    Abstract: A polymer represented by the following general formula (I): wherein X1, X2, and X3 each represent a chalcogen atom, R1 and R2 each independently represent any one selected from the group consisting of a hydrogen atom, an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 2 to 18 carbon atoms, and an aralkyl group, R3 and R4 each independently represent any one selected from the group consisting of an alkyl group having 1 to 6 carbon atoms, an alkenyl group having 2 to 6 carbon atoms, an aryl group, and an aralkyl group, R5 and R6 each independently represent any one selected from the group consisting of a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, an alkenyl group having 2 to 6 carbon atoms, an aryl group, and an aralkyl group, R7 represents a hydrogen atom or a methyl group, R8 represents any one selected from the group consisting of a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, an alkenyl group having 2 to 6 carbon atoms, an aryl group, and an aralkyl group, n
    Type: Grant
    Filed: February 20, 2020
    Date of Patent: November 12, 2024
    Assignee: KURARAY CO., LTD.
    Inventors: Daiki Noguchi, Takashi Fukumoto, Yuki Nishijima