Patents Assigned to Kuraray Co., Ltd.
  • Publication number: 20240136524
    Abstract: A sodium ion secondary battery that has high discharge capacity, excellent cycling characteristics, and excellent storage characteristics is provided. The present disclosure includes a carbonaceous material for a sodium ion secondary battery negative electrode. The carbon source of the carbonaceous material is a plant, and the carbonaceous material has a BET specific surface area of 100 m2/g or less.
    Type: Application
    Filed: December 26, 2023
    Publication date: April 25, 2024
    Applicant: KURARAY CO., LTD.
    Inventors: Shota KOBAYASHI, Tetsuhiro KOBAYASHI, Yasuhiro TADA
  • Publication number: 20240133782
    Abstract: A non-transitory computer readable storage medium with a destruction prediction program causing a computer to determine destruction prediction of a resin molding, and to function as a first calculation portion that calculates a maximum value of an equivalent strain that occurs in a cutout bottom and an inclination of an equivalent strain by applying, to a 3D test piece model of a test piece, a load at breaking the test piece, a threshold set portion that sets a threshold E of destruction progress based on the maximum value and the inclination, a second calculation portion that calculates a maximum value of an occurring equivalent strain and an inclination of an equivalent strain by applying a load to the 3D target model, and a destruction determination portion that determines whether or not destruction occurs based on the maximum value and the inclination, and the threshold.
    Type: Application
    Filed: February 14, 2022
    Publication date: April 25, 2024
    Applicant: KURARAY CO., LTD.
    Inventor: Kazuma YANAGISAWA
  • Publication number: 20240132632
    Abstract: A method for producing a hydrogenated polymer composition including a hydrogenated conjugated diene modified polymer that has a boron-containing functional group, the method including: (1) anionically polymerizing a monomer including a conjugated diene in the presence of a reactive metal or reactive metal compound capable of causing anionic polymerization to produce a reactive terminal polymer (Z); (2) reacting the reactive terminal polymer (Z) obtained in (1) with a boric acid compound that has at least two partial structures represented by B—O—R (I), and in which at least one R bonded to an oxygen atom in the partial structure (I) has a Taft's steric parameter Es value of ?0.30 or less to obtain an unhydrogenated conjugated diene modified polymer having a boron-containing functional group; and (3) hydrogenating at least some of carbon-carbon double bonds contained in conjugated diene units included in the unhydrogenated conjugated diene modified polymer obtained in (2).
    Type: Application
    Filed: February 8, 2022
    Publication date: April 25, 2024
    Applicant: KURARAY CO., LTD.
    Inventors: Tadahito FUKUHARA, Atsushi INATOMI, Takuro KARAKIDA, Satomi OHTA, Kenta TOSHINARI, Akio FUJITA
  • Patent number: 11959580
    Abstract: The present disclosure provides a fuel pipe having a double tube with an inner tube and an outer tube disposed on the outside of the inner tube.
    Type: Grant
    Filed: December 13, 2019
    Date of Patent: April 16, 2024
    Assignee: KURARAY CO., LTD.
    Inventors: Makoto Suzuki, Wout Luyten, Hiroyuki Shimo
  • Patent number: 11958954
    Abstract: There is provided a multilayer structure comprising a layer (A) containing an ethylene-vinyl alcohol copolymer having an ethylene unit content of 1 mol % or more and less than 20 mol %, a viscosity-average polymerization degree of 200 to 5000, and a saponification degree of 80 to 99.7 mol %, wherein a block character of ethylene units is 0.90 to 0.99; and a layer (B) containing at least one resin selected from the group consisting of a polyolefin resin, a polyester resin and a polyamide resin. Such a multilayer structure has excellent oxygen-gas barrier performance. In addition, an aqueous solution containing the ethylene-vinyl alcohol copolymer exhibits excellent viscosity stability even after long-term storage. Therefore, even after a long period of time from preparation of the aqueous solution, it can be uniformly applied to a substrate and thus, a multilayer structure having excellent oxygen-gas barrier performance can be provided.
    Type: Grant
    Filed: July 17, 2019
    Date of Patent: April 16, 2024
    Assignee: KURARAY CO., LTD.
    Inventors: Tadahito Fukuhara, Tatsuya Tanida
  • Publication number: 20240116281
    Abstract: Provided are a multilayer structure and the like being superior in adhesiveness of an interlayer under high humidity and separability of a barrier layer in water, and even in a case in which the barrier layer is exposed to water in a separating and collecting step, being superior in viscosity stability after separating and collecting a resin that constitutes the barrier layer. The multilayer structure of the present invention is a multilayer structure including a barrier layer (A), a water-soluble layer (B), and an adhesive layer (C), in which: the adhesive layer (C) is laminated via the water-soluble layer (B) on one or both faces of the barrier layer (A); the barrier layer (A) contains a polyamide or an ethylene-vinyl alcohol copolymer (a1) as a principal component; and the water-soluble layer (B) contains an alkali metal ion (b1) at a content of 100 ppm or more and 2,000 ppm or less.
    Type: Application
    Filed: November 24, 2021
    Publication date: April 11, 2024
    Applicant: Kuraray Co., Ltd.
    Inventors: Satoshi Ishiuchi, Makoto Suzuki
  • Publication number: 20240117178
    Abstract: A resin composition containing: a block copolymer (I) having a polymer block (a1) containing a structural unit derived from an aromatic vinyl compound and a polymer block (a2) containing a structural unit derived from a conjugated diene compound; a plasticizer (II); and a biomass-derived polyolefin-based resin (III); in which the plasticizer (II) contains a plasticizer (II-1) containing a biomass-derived raw material; and in which the resin composition has a biobased content of 45% by mass or more, and a molded body obtained by using the resin composition.
    Type: Application
    Filed: January 28, 2022
    Publication date: April 11, 2024
    Applicant: KURARAY CO., LTD.
    Inventors: Daisuke KONISHI, Hiromitsu SASAKI, Takahiro SEKIGUCHI, Yuta TOMISHIMA, Takumi HASEGAWA
  • Publication number: 20240118485
    Abstract: A plastic wavelength shifting fiber includes a core containing a fluorescent agent having a peak of a fluorescence spectrum in a wavelength range of 430 to 550 nm, and a cladding covering an outer peripheral surface of the core and having a refractive index lower than that of the core. The number of carbonyl bonds in the fluorescent agent is one or smaller.
    Type: Application
    Filed: January 14, 2022
    Publication date: April 11, 2024
    Applicant: KURARAY CO., LTD.
    Inventors: Masashi AKARI, Yuichi KATOH, Ryuichi IWAKAWA
  • Publication number: 20240120493
    Abstract: Provided is an additive for nonaqueous electrolyte secondary battery positive electrodes, which can improve the electrical conductivity of electrodes, decrease the resistance of electrodes, and increase the use efficiency of cation species such as lithium ions, sodium ions, various quaternary ammonium salts, and phosphonium salts. The additive includes a carbonaceous material having a specific surface area as determined by the BET method of from 1,000 m2/g to 2,000 m2/g, a micropore volume as determined by the DFT method of less than 0.60 cm3/g, and an oxygen content as measured by elemental analysis of 0.5% by mass or more and less than 1.3% by mass.
    Type: Application
    Filed: February 2, 2022
    Publication date: April 11, 2024
    Applicant: KURARAY CO., LTD.
    Inventors: Shohei KOBAYASHI, Shushi NISHIMURA, Hideharu IWASAKI
  • Patent number: 11951731
    Abstract: Provided are a multilayer body in which base materials composed of a metal, a resin or the like are firmly bonded to each other even when not subjected to primer treatment or the like, and a method for producing the multilayer body. The multilayer body has a base material (X), an adhesive layer (Y), and a base material (Z) in this order, wherein the adhesive layer (Y) contains a hydrogenated block copolymer (A) obtained by hydrogenating a block copolymer (P) containing a polymer block (a) composed of a structural unit derived from an aromatic vinyl compound and a polymer block (b) composed of a structural unit derived from a conjugated diene, the mass ratio [(a)/(b)] of the polymer block (a) to the polymer block (b) is 1/99 to 50/50, and the adhesive layer (Y) has a storage modulus G? at 100° C. of 1.2×105 to 4.0×105 Pa.
    Type: Grant
    Filed: February 25, 2021
    Date of Patent: April 9, 2024
    Assignee: KURARAY CO., LTD.
    Inventors: Daisuke Konishi, Hiromitsu Sasaki, Yuta Tomishima
  • 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