Patents Assigned to Kuraray Co., Ltd.
  • Poly(vinyl alcohol) mold release film for artificial marble molding use, and method for producing artificial marble using same
    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
  • Modified conjugated diene polymer and polymer composition including said modified conjugated diene polymer
    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
  • Reinforcing fiber, method for manufacturing same, and molded body using same
    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
  • Hydrogenated block copolymer
    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
  • ACTIVATED CARBON AND WATER TREATMENT METHOD USING SAID ACTIVATED CARBON
    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
  • Thermoplastic liquid crystal polymer film and circuit board using same
    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
  • Napped artificial leather and method for producing same
    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
  • Resin Pellet Group and Lamination Structure Using the Same
    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
  • Polymethallyl alcohol resin composition and molding containing same
    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
  • Polymer, and oxygen absorbent and resin composition using same
    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
  • VINYL ALCOHOL POLYMER, METHOD FOR PRODUCING VINYL ALCOHOL POLYMER, DISPERSANT FOR SUSPENSION POLYMERIZATION, DISPERSION AID FOR SUSPENSION POLYMERIZATION, AND METHOD FOR PRODUCING VINYL POLYMER
    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
  • Patterned fiber substrate
    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
  • Activated carbon and production method thereof
    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
  • LEATHER-LIKE SHEET AND BACKPACK USING THE SAME AS A BACK SURFACE MATERIAL
    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
  • RESIN COMPOSITION, MOLDED BODY AND TUBE
    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
  • IMMUNOISOLATION DEVICE
    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
  • METHOD OF PRODUCING A COPOLYMER HAVING IMPROVED OIL RETENTION PROPERTIES
    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
  • Polyvinyl alcohol-based resin and plugging agent for underground treatment
    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
  • Grained leather-like sheet
    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
  • POLYMER, FLAME-RETARDANT COMPOSITION, AND METHOD FOR PRODUCING POLYMER
    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