Patents Assigned to Kuraray Co., Ltd.
  • 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
  • Patent number: 11883988
    Abstract: Disclosed is a mold release film that is to be placed between a stock solution that serves as a raw material for artificial marble and a shaping apparatus when the stock solution is fed to the shaping apparatus, and then solidified and molded.
    Type: Grant
    Filed: September 6, 2019
    Date of Patent: January 30, 2024
    Assignee: KURARAY CO., LTD.
    Inventors: Osamu Kazeto, Takashi Nerio, Masahiro Takafuji
  • Patent number: 11884780
    Abstract: The present invention provides a modified conjugated diene polymer that has excellent hydrophilicity and is useful for modification of polar polymers. The present invention also provides a modified conjugated diene polymer and a polymer modifier that, when used for modification of a polar polymer, can enhance characteristics, for example, flexibility, of the composition including the polymer and also offer excellent processability and shaping properties. The present invention further provides a polymer composition including such a conjugated diene polymer. A polymer modifier (A) includes a modified conjugated diene polymer (A1) having a hydrophilic group having a polyethylene glycol structure.
    Type: Grant
    Filed: July 10, 2020
    Date of Patent: January 30, 2024
    Assignee: KURARAY CO., LTD.
    Inventor: Daisuke Koda
  • Patent number: 11884788
    Abstract: Provided are reinforcing fibers using an adhesive component not containing resorcinol and formaldehyde, which are excellent in adhesiveness to rubber and which can be efficiently produced while preventing contamination of production facilities, and a method for producing them, as well as a molded article using them. The reinforcing fibers have an adhesive component that contains a conjugated diene rubber and an oil, in at least a part of the surfaces thereof, wherein the vapor pressure at 20° C. of the oil is 10 Pa or less.
    Type: Grant
    Filed: February 21, 2020
    Date of Patent: January 30, 2024
    Assignee: KURARAY CO., LTD.
    Inventors: Toru Asada, Daisuke Koda, Shuhei Yorimitsu, Shinichi Takemoto, Hiroyuki Kawai
  • Publication number: 20240024845
    Abstract: An object of the present invention is to provide an activated carbon that can efficiently remove fluorine-containing organic compounds and a treatment method of water containing fluorine-containing organic compounds. An activated carbon according to an aspect of the present invention has an average particle diameter of 0.1 to 10 mm, a BET specific surface area of 500 m2/g or more and 2000 m2/g or less, and a porosity inside a particle of 10% or more and 40% or less as obtained by X-ray CT. A water treatment method according to another aspect of the present invention includes a step of bringing the activated carbon into contact with water to be treated containing a fluorine-containing organic compound to obtain treated water having a fluorine-containing organic compound content of 0.1 ppb or less.
    Type: Application
    Filed: September 10, 2021
    Publication date: January 25, 2024
    Applicant: KURARAY CO., LTD.
    Inventors: Hideharu IWASAKI, Akira MIYAKE
  • Patent number: 11877395
    Abstract: Provided is a thermoplastic liquid crystal polymer film (TLCP film) having a dielectric constant in a thickness direction of the film, which is suitable for a millimeter-wave radar substrate. The TLCP film is a film comprising a thermoplastic polymer capable of forming an optically anisotropic melt phase, wherein the TLCP film has a dielectric constant of from 2.5 to 3.2 in the thickness direction of the film at a temperature of 23° C. and a frequency of 20 GHz, and a heat deformation temperature of from 180 to 320° C. The TLCP film has, on a film plane, dielectric constants of from 2.6 to 3.7 at a temperature of 23° C. and a frequency of 15 GHz both in one direction of the film and in a direction perpendicular to the one direction of the film.
    Type: Grant
    Filed: April 30, 2021
    Date of Patent: January 16, 2024
    Assignee: KURARAY CO., LTD.
    Inventors: Minoru Onodera, Tatsuya Sunamoto, Takeshi Takahashi, Takahiro Nakashima
  • Patent number: 11873606
    Abstract: Disclosed is a napped artificial leather napped including: a non-woven fabric that is an entangle body of ultrafine fibers; and an elastic polymer impregnated into the non-woven fabric, the napped artificial leather having, at least on one side thereof, a napped surface formed by napping the ultrafine fibers, wherein the ultrafine fibers contain 0.5 mass % or more of a pigment (A), the elastic polymer contains 0 to 0.01 mass % of a pigment (B), and the ultrafine fibers and the elastic polymer are undyed; the napped surface has a lightness L* value of 25 or less in a color coordinate space (L*a*b* color space); and a ratio of an area occupied by the elastic polymer, observed on the napped surface, to a total area of an area occupied by the ultrafine fibers and the area occupied by the elastic polymer is 0.5% or less.
    Type: Grant
    Filed: December 10, 2019
    Date of Patent: January 16, 2024
    Assignee: KURARAY CO., LTD.
    Inventors: Hiroyuki Hattori, Yasuhiro Katou, Kazuyuki Suetoshi, Rei Nagayama
  • Publication number: 20240010799
    Abstract: A resin pellet group according to the present invention includes a pellet (A1) containing an ethylene-vinyl alcohol copolymer (a1), and a pellet (A2) containing an ethylene-vinyl alcohol copolymer (a2). Here, the pellet (A1) has a melt tension of 10 mN or more and 30 mN or less at a take-up speed of 50 m/min and 210° C., and the pellet (A2) has a melt tension of 2 mN or more and less than 10 mN at a take-up speed of 50 m/min and 210° C. Furthermore, an ethylene unit content (ECa1) of the ethylene-vinyl alcohol copolymer (a1) is different from an ethylene unit content (ECa2) of the ethylene-vinyl alcohol copolymer (a2), and a mass ratio (A1/A2) of the pellet (A1) to the pellet (A2) is set to 20/80 or more and 99/1 or less.
    Type: Application
    Filed: December 16, 2021
    Publication date: January 11, 2024
    Applicant: KURARAY CO., LTD.
    Inventors: Rina Hoshika, Yasushi Morihara
  • Patent number: 11866528
    Abstract: A polymer comprising a structural unit derived from a compound (A) represented by formula (I): wherein X, Y, R1, R2, R7, R8, R3, R4, R5, R6, J, and n are as defined in the description, provides a resin composition that has an excellent curability and sufficiently polymerizes for curing even in the presence of oxygen in an air atmosphere to form a cured product having excellent appearance.
    Type: Grant
    Filed: April 12, 2019
    Date of Patent: January 9, 2024
    Assignee: KURARAY CO., LTD.
    Inventors: Daiki Noguchi, Takashi Fukumoto, Keiji Kubo
  • Patent number: 11865815
    Abstract: Provided is a resin composition containing polymethallyl alcohol (A) having a repeating structural unit represented by the following formula (1) in an amount of greater than or equal to 30 mol %, and a component (B) that is at least one of an acid component having a pKa of 3.5 to 7.5 and an anion of the acid component, the pKa being a logarithmic value of a reciprocal of an acid dissociation constant at 25° C., a content of the component (B) being greater than or equal to 0.01 ?mol per 1 g of the polymethallyl alcohol (A); a method of producing the resin composition; and a molding containing the resin composition.
    Type: Grant
    Filed: December 24, 2015
    Date of Patent: January 9, 2024
    Assignee: KURARAY CO., LTD.
    Inventors: Yasuhiro Nonaka, Yasutaka Inubushi
  • Publication number: 20240002565
    Abstract: A vinyl alcohol polymer including, in the same molecule or in different molecules, a carbonyl group, a formyl group, and an alkenyl group. A method for producing a vinyl alcohol polymer, including polymerizing a vinyl ester in a presence of an unsaturated aliphatic aldehyde to obtain a vinyl ester polymer, and saponifying the vinyl ester polymer.
    Type: Application
    Filed: September 28, 2021
    Publication date: January 4, 2024
    Applicant: KURARAY CO., LTD.
    Inventors: Misuzu FUKUYAMA, Masaki KATO
  • Patent number: 11857943
    Abstract: Disclosed herein are activated carbons having high decolorization performance in liquid phases, especially 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 at a pore diameter of 10 to 10000 nm measured by the mercury intrusion method of 0.8 to 1.9 mL/g, and having a pore volume at a pore diameter of 300 to 1000 nm measured by the mercury intrusion method of 0.19 mL/g or more.
    Type: Grant
    Filed: December 14, 2018
    Date of Patent: January 2, 2024
    Assignee: KURARAY CO., LTD.
    Inventors: Hiroaki Kitatomi, Mitsunori Nishita, Mitsunori Hitomi, Takayuki Yamada
  • Patent number: 11864314
    Abstract: The present invention relates to a patterned fiber substrate comprising: a fiber substrate; and a pattern consisting of a functional material and formed on the fiber substrate, wherein at least a part of the functional material that constitutes the pattern is present in inside of the fiber substrate, the fiber substrate has a contact angle of 100 to 170° with pure water on its surface, and the pattern has a narrowest line width of 1 to 3000 ?m.
    Type: Grant
    Filed: December 18, 2019
    Date of Patent: January 2, 2024
    Assignees: KURARAY CO., LTD., OSAKA RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE AND TECHNOLOGY
    Inventors: Kohei Hayashi, Soichi Obata, Yasuhiro Shirotani, Masashi Nitani, Mayumi Uno, Kazuki Maeda