Patents Assigned to Kuraray Co., Ltd.
  • 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
  • Publication number: 20230414832
    Abstract: An object of this invention relates to provide a macroencapsulation immunoisolation device that can be easily removed, does not break, and is suitable for improvement in the diffusion efficiency of a physiologically active substance required for transplantation while maintaining an immunoisolation effect. The present invention provide an immunoisolation device comprising an embedding chamber for a material to be transplanted, the embedding chamber being covered with an immunoisolation membrane.
    Type: Application
    Filed: October 28, 2021
    Publication date: December 28, 2023
    Applicant: KURARAY CO., LTD.
    Inventors: Goro KOBAYASHI, Masako KAWAGOE, Satoru AYANO
  • Publication number: 20230416518
    Abstract: A resin composition containing a hydrogenated block copolymer (I) and a polypropylene-based resin (II), and a molded body and a tube obtained by using the resin composition. In the resin composition, the hydrogenated block copolymer (I) includes a polymer block (A) and a polymer block (B), the polymer block (B) includes a structural unit derived from a conjugated diene compound, an average of vinyl bond amounts in the whole polymer block (B) included in the resin composition is 50% by mole or more, and a D hardness of a sheet prepared through hot-press molding of the resin composition is less than 50.
    Type: Application
    Filed: October 27, 2021
    Publication date: December 28, 2023
    Applicant: KURARAY CO., LTD.
    Inventor: Naoto TAKAHASHI
  • Publication number: 20230416982
    Abstract: Disclosed is a leather-dike sheet including a fiber base material and a colored resin layer laminated on the fiber base material, wherein the colored resin layer includes an intermediate layer and a skin layer laminated on the intermediate layer, wherein the skin layer is a layer containing polyurethane and a black pigment of 3 g/m2 or more, and the intermediate layer is a layer containing polyurethane and a black pigment, and in the L*a*b* color system, a leather-like sheet having a lightness value of L*?30 is used.
    Type: Application
    Filed: November 15, 2021
    Publication date: December 28, 2023
    Applicant: Kuraray Co., Ltd.
    Inventors: Tetsuya ASHIDA, Kansai Hara
  • Publication number: 20230416443
    Abstract: A method of producing a copolymer includes polymerizing monomers including 1,3-diene structure having 4 to 20 carbons in a solvent in a presence of an anionic polymerization initiator.
    Type: Application
    Filed: June 22, 2023
    Publication date: December 28, 2023
    Applicant: KURARAY CO., LTD.
    Inventors: Shinya Oshita, Heith Foster
  • Patent number: 11851607
    Abstract: Provided are a polyvinyl alcohol-based resin having an excellent plugging effect and a plugging agent for underground treatment. A polyvinyl alcohol-based resin is disclosed, in which a degree of swelling (%) when the polyvinyl alcohol-based resin is immersed in water at 40° C. for 30 minutes and a solubility (%) when the polyvinyl alcohol-based resin is immersed in water at 65° C. for 5 hours satisfy the degree of swelling/the solubility?3.0.
    Type: Grant
    Filed: February 26, 2021
    Date of Patent: December 26, 2023
    Assignee: KURARAY CO., LTD.
    Inventor: Yasuhiro Tajima
  • Patent number: 11851812
    Abstract: Disclosed is a grain-finished leather-like sheet including a polyurethane skin film containing a polyether-based polyurethane, wherein the polyurethane skin film contains a quinacridone-based red pigment, and is colored in a red color having an L* value of ?80, an a* value of ?20, and a b* value of ?15 in an L*a*b* color system, and the number of cycles of a flexing endurance test at which cracking occurs in a surface of the polyurethane skin film is 100000 or more, when the flexing endurance test is performed on the grain-finished leather-like sheet under an environment of 20° C. using a flexometer after the grain-finished leather-like sheet has been irradiated with carbon arc at a black panel temperature of 63° C. for 100 hours with an irradiance of 500±50 W/m2, using ultraviolet carbon arc lamp light compliant with JIS B 7751.
    Type: Grant
    Filed: April 19, 2019
    Date of Patent: December 26, 2023
    Assignee: KURARAY CO., LTD.
    Inventors: Tetsuya Ashida, Kansai Hara
  • Publication number: 20230407076
    Abstract: A polymer including a structural unit represented by the following general formula (I), a flame-retardant composition comprising the polymer, and a method for producing the polymer. In the general formula (I), R1 represents a hydrogen atom or a methyl group; R2 and R3 each independently represent any one selected from the group consisting of an alkyl group having 1 to 6 carbon atoms, an alkyloxy group having 1 to 6 carbon atoms, an alkenyl group having 2 to 6 carbon atoms, an alkenyloxy group having 2 to 6 carbon atoms, an aralkyl group having 7 to 12 carbon atoms, an aralkyloxy group having 7 to 12 carbon atoms, an aryl group having 6 to 12 carbon atoms, and an aryloxy group having 6 to 12 carbon atoms, and R 2 and R 3 may be bonded to each other; and n is an integer of 0 to 7.
    Type: Application
    Filed: November 17, 2021
    Publication date: December 21, 2023
    Applicant: KURARAY CO., LTD.
    Inventors: Daiki NOGUCHI, Yuki SASAKI, Takashi FUKUMOTO
  • Publication number: 20230407454
    Abstract: The present disclosure relates to a multilayer structure including: a laminate including a base (X) and at least two layers (Y), the layers (Y) being provided on both faces of the base (X); and layers (Z) containing a thermoplastic resin.
    Type: Application
    Filed: November 2, 2021
    Publication date: December 21, 2023
    Applicant: Kuraray Co., Ltd.
    Inventors: Shuhei Kuzume, Tatsuya Oshita
  • Publication number: 20230406964
    Abstract: A dispersant for suspension polymerization may, even when a usage amount thereof is low, enable obtaining polymer particles having a small average particle diameter with few coarse particles, and having favorable plasticizer absorptivity. Such a dispersant may include a vinyl alcohol polymer having a structure of following formula (1) and satisfy inequality (2) 0.4?[X]×102/[Ra,1]2?3.0??(2). In formula (1), R is a hydrocarbon group having 4 or more carbon atoms. In inequality (2), [X] is a mole percentage content of the structure of formula (1) with respect to total structural units of the vinyl alcohol polymer; and [Ra,1] is an HSP distance ((J/cm3)1/2) between the structure of formula (1) and vinyl chloride.
    Type: Application
    Filed: October 29, 2021
    Publication date: December 21, 2023
    Applicant: KURARAY CO., LTD.
    Inventors: Misuzu FUJIMORI, Masaki KATO, Tatsuya TANIDA
  • Publication number: 20230406981
    Abstract: A polymer having a structural unit represented by the following general formula (I), a flame-retardant composition comprising the polymer, and a method for producing the polymer. In the general formula (I), R1 represents any one selected from the group consisting of an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 2 to 18 carbon atoms, and an aralkyl group having 7 to 18 carbon atoms; R2 represents a hydrogen atom or a methyl 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 alkyloxy group having 1 to 6 carbon atoms, an alkenyl group having 2 to 6 carbon atoms, an alkenyloxy group having 2 to 6 carbon atoms, an aralkyl group having 7 to 12 carbon atoms, an aralkyloxy group having 7 to 12 carbon atoms, an aryl group having 6 to 12 carbon atoms, and an aryloxy group having 6 to 12 carbon atoms, and R3 and R4 may be bonded to each other; and n is an integer of 0 to 5.
    Type: Application
    Filed: November 17, 2021
    Publication date: December 21, 2023
    Applicant: KURARAY CO., LTD.
    Inventors: Daiki NOGUCHI, Yuki SASAKI, Takashi FUKUMOTO