Patents Assigned to Kuraray Co., Ltd.
  • Publication number: 20240110052
    Abstract: The present disclosure provides a resin pellet group including a pellet (A1) containing an ethylene-vinyl alcohol copolymer (a1), and a pellet (A2) containing an ethylene-vinyl alcohol copolymer (a2).
    Type: Application
    Filed: December 16, 2021
    Publication date: April 4, 2024
    Applicant: KURARAY CO., LTD.
    Inventors: Mizuko Oshita, Luyten Wout
  • Patent number: 11945724
    Abstract: Disclosed herein are activated carbons having a high decolorization performance in a liquid phase, and methods for producing the activated carbons. Disclosed herein are also activated carbons having a high decolorization performance in liquid phases having relatively high viscosities, such as sugar liquids, and methods for producing the activated carbons. Activated carbons disclosed herein include activated carbons having a pore volume, which is calculated by measuring a nitrogen adsorption isotherm at 77 K and performing the MP method analysis, of 0.58 mL/g or less, and having a pore volume at a pore diameter of 10 to 10000 nm measured by the mercury intrusion method of 0.35 mL/g or more.
    Type: Grant
    Filed: December 14, 2018
    Date of Patent: April 2, 2024
    Assignee: KURARAY CO., LTD.
    Inventors: Hiroaki Kitatomi, Mitsunori Nishita, Mitsunori Hitomi, Takayuki Yamada
  • Patent number: 11944093
    Abstract: The present invention provides a spreading agent for agrochemicals having superior adhesion particularly for plant surface. The present invention also provides an agrochemical spray solution having a reduced risk of leaving the spreading agent for agrochemicals on a plant surface. The present invention relates to a spreading agent for agrochemicals comprising a carboxy-modified vinyl alcohol polymer (A) having a carboxy-containing monomer unit content of 0.1 mol % to 10 mol %, a viscosity-average degree of polymerization of 200 to 5,000, and a degree of saponification of 65 mol % to 99.9 mol %.
    Type: Grant
    Filed: March 7, 2019
    Date of Patent: April 2, 2024
    Assignee: KURARAY CO., LTD.
    Inventors: Taeko Kaharu, Keisuke Morikawa
  • Publication number: 20240101760
    Abstract: The present invention relates to a method for producing an acetalization product of an ethylene/vinyl alcohol copolymer by acetalization of an ethylene/vinyl alcohol copolymer, wherein the ethylene/vinyl alcohol copolymer is a porous object.
    Type: Application
    Filed: March 28, 2022
    Publication date: March 28, 2024
    Applicant: KURARAY CO., LTD.
    Inventors: Akio TAKASUGI, Takuro NIIMURA, Atsuhiro NAKAHARA, Yoshiaki ASANUMA
  • Publication number: 20240101872
    Abstract: A laminate is provided that has an adhesive layer including a composition containing an acrylic block copolymer, the adhesive layer being so designed that it has a small change in adhesive force over time. The laminate includes an adhesive layer (B) including an acrylic adhesive composition (Z), and a substrate layer (A) including a polyolefin resin (a), the acrylic adhesive composition (Z) including an acrylic block copolymer (I) having one or more polymer blocks (b1) containing an acrylic acid ester-derived structural unit, and one or more polymer blocks (b2) containing a methacrylic acid ester-derived structural unit, the polymer block (b1) containing a structural unit derived from an acrylic acid ester (b1-1) represented by the general formula (1) CH2?CH—COOR1 (wherein R1 denotes a C7-C12 organic group).
    Type: Application
    Filed: December 16, 2021
    Publication date: March 28, 2024
    Applicant: KURARAY CO., LTD.
    Inventors: Makoto AKAI, Tomoe TAKASAKI, Moe KAWAHARA, Tomohiro ONO
  • Patent number: 11939442
    Abstract: The present disclosure relates to a water-soluble film comprising polyvinyl alcohol having a polymerization degree of 100 to 3,000 and a polyhydric alcohol plasticizer.
    Type: Grant
    Filed: September 30, 2022
    Date of Patent: March 26, 2024
    Assignee: KURARAY CO., LTD.
    Inventors: Osamu Kazeto, Masahiro Takafuji
  • Patent number: 11939441
    Abstract: The present disclosure relates to a water-soluble film with polyvinyl alcohol having a polymerization degree of 100 to 3,000 and a polyhydric alcohol plasticizer.
    Type: Grant
    Filed: September 30, 2022
    Date of Patent: March 26, 2024
    Assignee: KURARAY CO., LTD.
    Inventors: Osamu Kazeto, Masahiro Takafuji
  • Patent number: 11936067
    Abstract: An alkaline battery separator containing an alkali resistant fiber and a binder, wherein the alkaline battery separator has two surfaces which are a surface A that is smoother comparing with the other surface and has an arithmetic mean surface roughness Ra (A), and a surface B that is rougher and has an arithmetic mean surface roughness Ra (B), the amount of the binder is 5 to 20% by mass based on the total mass of the separator, a value obtained by dividing the arithmetic mean surface roughness Ra (A) by the arithmetic mean surface roughness Ra (B) [Ra (A)/Ra (B)] is 0.700 or more and 0.980 or less, and the arithmetic mean surface roughness Ra (B) of the surface B is 3.0 ?m or more and 10 ?m or less.
    Type: Grant
    Filed: December 13, 2019
    Date of Patent: March 19, 2024
    Assignee: KURARAY CO., LTD.
    Inventors: Tomohiro Hayakawa, Haruna Mitsumori, Toshimichi Kusunoki, Hiroyuki Kawai
  • Publication number: 20240084089
    Abstract: Provided are: porous pellets of an EVOH; and a method for producing the same, which can be accompanied by not only washing out of saponification residues in a shorter period of time, but also inhibiting conglutination of the pellets with one another during washing at a high temperature. Porous pellets of an ethylene-vinyl alcohol copolymer having pores, wherein in the porous pellets, a proportion (V2/V1×100) of a total value (V2) of pore volumes of pores having pore diameters of 0.5 to 100 ?m with respect to a total value (V1) of pore volumes of pores having pore diameters of 0.005 to 100 ?m is 25 to 40% by volume, and a pore surface area of pores having pore diameters of 0.005 to 100 ?m is 25 to 45 m2/g.
    Type: Application
    Filed: February 1, 2022
    Publication date: March 14, 2024
    Applicant: Kuraray Co., Ltd.
    Inventor: Mizuko Oshita
  • Patent number: 11926960
    Abstract: Disclosed is a leather-like sheet having a surface configured such that, when an L* value, a C* value, and an h value under illumination of a D65 light source are represented as L*D65, C*D65, and hD65, and an L* value, a C* value, an h value under illumination of an F10 light source are represented as L*F10, C*F10, and hF10, L*D65 is 30 to 95, and at least one selected from a condition |?C|=|C*F10?C*D65|?7, and a condition |?h°|=|hF10?hD65|?7° is satisfied.
    Type: Grant
    Filed: November 15, 2019
    Date of Patent: March 12, 2024
    Assignee: KURARAY CO., LTD.
    Inventors: Masato Warita, Michinori Fujisawa
  • Publication number: 20240076479
    Abstract: A purging agent which enables efficiently discharging a resin to be purged in a molding apparatus is provided. Porous particles contain: an ethylene-vinyl alcohol copolymer (A); and an alkali metal (B), wherein a median pore diameter is 0.01 to 3 ?m, an average particle diameter is 2.5 to 8 mm, and a content of the alkali metal (B) is 1,000 to 100,000 ppm.
    Type: Application
    Filed: February 1, 2022
    Publication date: March 7, 2024
    Applicant: Kuraray Co., Ltd.
    Inventors: Makoto Suzuki, Mizuko Oshita
  • Publication number: 20240076814
    Abstract: Disclosed herein are methods for producing core-sheath structures by shaping at least one filament bundle containing a plurality of filaments to form at least one shaped strand of filaments, and braiding a plurality of strands, including the at least one shaped strand of filaments, over a core to form the core-sheath structure containing a braided sheath of the strands surrounding the core, wherein the shaped strand of filaments is an untwisted strand having a twist level of less than 1 turn per meter, a cross-sectional aspect ratio of the shaped strand of filaments is at least 3:1, as measured in the braided sheath, a thickness of at least a portion of the braided sheath ranges from about 10 to about 200 ?m, and the braided sheath comprises a synthetic fiber having a tensile strength of greater than 12 cN/dtex. Also disclosed herein are core-sheath structures formed by such methods.
    Type: Application
    Filed: April 27, 2023
    Publication date: March 7, 2024
    Applicant: KURARAY CO., LTD.
    Inventors: Forrest SLOAN, Patrick Coffey
  • Publication number: 20240058764
    Abstract: A gas separation membrane module includes at least one hollow fiber membrane element and a casing. The hollow fiber membrane element includes hollow fiber membranes and a cylindrical body. The cylindrical body extends in a longitudinal direction of the hollow fiber membranes, and accommodates the hollow fiber membranes. The hollow fiber membrane element includes sweep gas introduction ports and mixed gas discharge ports. A first supply chamber, a first discharge chamber, a second supply chamber, and a second discharge chamber are positioned between the casing and the hollow fiber membrane element. The first supply chamber, the first discharge chamber, the second supply chamber, and the second discharge chamber are partitioned off from each other.
    Type: Application
    Filed: September 29, 2020
    Publication date: February 22, 2024
    Applicants: KAWASAKI JUKOGYO KABUSHIKI KAISHA, KURARAY, CO., LTD.
    Inventors: Katsuya UMEMOTO, Takafumi ITO, Koji FUKUMOTO, Tomoaki UMEMURA, Koji MIYAKE, Kazuhiko EDA, Youhei YABUNO, Kensaku KOMATSU
  • Publication number: 20240052084
    Abstract: A hydrogenated product of a block copolymer containing a polymer block (A) that contains a structural unit derived from an aromatic vinyl compound and a polymer block (B) that contains a structural unit derived from a conjugated diene compound, which satisfies the following requirements: (1) The structural unit derived from a conjugated diene compound of the polymer block (B) has a structural unit derived from butadiene and a structural unit derived from a second conjugated diene compound which is a conjugated diene compound except butadiene. (2) The glass transition temperature is ?57° C. or lower.
    Type: Application
    Filed: December 17, 2021
    Publication date: February 15, 2024
    Applicant: KURARAY CO., LTD.
    Inventors: Yasushi SENDA, Masahiro KATO
  • Patent number: 11898035
    Abstract: Provided are a polyamide composition containing a polyamide (A) having a melting point of 280° C. or higher and a flame retardant (B), which is such that, when a melt of the polyamide composition is injection-molded with a mold having a thickness of 0.5 mm and a width of 40 mm under the condition of a cylinder temperature higher by 20° C. than the melting point of the polyamide (A), an injection pressure of 74 MPa and a mold temperature of 140° C., the flow length is 40 mm or more, and that the melt flow rate at a temperature of 320° C. and under a load of 2.16 kg is 15 g/10 min or less; and a molded article of the polyamide composition.
    Type: Grant
    Filed: August 21, 2019
    Date of Patent: February 13, 2024
    Assignee: KURARAY CO., LTD.
    Inventors: Shimon Kanai, Takaharu Shigematsu
  • Publication number: 20240043602
    Abstract: A polyester polyol obtained by reacting a dicarboxylic acid component (A) with a diol component (B). The dicarboxylic acid component (A) contains a dicarboxylic acid (a1) represented by the following general formula (I) and a dicarboxylic acid (a2) represented by the following general formula (II). A content of the dicarboxylic acid (a2) is 0.02 to 3.00% by mass in 100% by mass of the total amount of the dicarboxylic acid component (A): R1, R2, R4, and R5 each independently represent a divalent hydrocarbon group having 1 to 3 carbon atoms, and R3 and R6 each independently represent a monovalent hydrocarbon group having 1 to 3 carbon atoms.
    Type: Application
    Filed: February 4, 2022
    Publication date: February 8, 2024
    Applicant: KURARAY CO., LTD.
    Inventors: Takashi OOGUMA, Takuo TSURUTA, Junichi FUJI
  • Publication number: 20240043630
    Abstract: The present disclosure provides a method of producing water-containing EVOH pellets introducing a water-containing EVOH into an extruder for melt kneading; and cutting the water-containing EVOH extruded from the extruder.
    Type: Application
    Filed: December 23, 2021
    Publication date: February 8, 2024
    Applicant: KURARAY CO., LTD.
    Inventor: Hirotaka Shiota
  • Publication number: 20240040980
    Abstract: Provided are: a culture fluid for hydroponics accompanied by a large amount of water absorption by plants; an additive for a culture fluid, the additive enabling such a culture fluid to be readily prepared; and a cultivation method in which the same is used. A culture fluid for hydroponics contains water-soluble polymeric molecules, and has a surface tension at 20° C. of 45 mN/m or more and 70 mN/m or less, and a kinematic viscosity at 30° C. of 0.8 mm2/s or more and 2.00 mm2/s or less.
    Type: Application
    Filed: December 22, 2021
    Publication date: February 8, 2024
    Applicant: Kuraray Co., Ltd.
    Inventors: Taeko Kaharu, Yoriko Imaoka, Yasuhiro Tajima
  • Patent number: 11884756
    Abstract: A method of producing modified vinyl alcohol-based polymer particles, includes mixing vinyl alcohol-based polymer particles with a mixed medium containing unsaturated carboxylic acid, an acid catalyst, and water, wherein, by mixing the vinyl alcohol-based polymer particles with the mixed medium, the vinyl alcohol-based polymer particles are reacted with the unsaturated carboxylic acid to obtain modified vinyl alcohol-based polymer particles containing a vinyl ester unit represented by a formula (2) below, having a vinyl alcohol unit content based on the total constitutional units of 60 mol % or more and less than 95 mol %, and having an average particle diameter from 50 to 2000 ?m. The production method is capable of controlling the particle shape and does not cause the problem of the residual sulfur content, and is further convenient and economically advantageous.
    Type: Grant
    Filed: December 26, 2019
    Date of Patent: January 30, 2024
    Assignee: KURARAY CO., LTD.
    Inventors: Yuki Tachibana, Yusuke Amano, Yuki Shimizu, Kazuhiko Maekawa
  • Patent number: 11884812
    Abstract: A hydrogenated block copolymer containing polymer blocks (A1) and (A2) each mainly containing an aromatic vinyl compound-derived structural unit and polymer blocks (B) and (C) each mainly containing a conjugated diene compound-derived structural unit, at least one of the polymer blocks (B) and (C) being present between the polymer blocks (A1) and (A2), the hydrogenated block copolymer having a total content of the polymer blocks (A1) and (A2) of 5 to 30% by mass, a 3,4-bond and 1,2-bond content in the polymer block (B) of 1 to 40% by mole, a 3,4-bond and 1,2-bond content in the polymer block (C) of 50 to 100% by mole, and a mass ratio [(C)/{(B)±(C)} of the polymer block (C) to the sum of the polymer blocks (B) and (C) of 26/100 to 63/100.
    Type: Grant
    Filed: June 28, 2019
    Date of Patent: January 30, 2024
    Assignee: KURARAY CO., LTD.
    Inventors: Naoto Takahashi, Yusuke Nojima