Patents Assigned to Kuraray Co., Ltd.
  • Publication number: 20200291217
    Abstract: The present invention provides an aqueous emulsion excellent in heat resistance, water resistance (particularly, hot water resistance and boiling resistance), and viscosity stability. The present invention also provides an adhesive containing the aqueous emulsion, forming an adhesive layer resistant to staining, and ensuring a high level of safety. The present invention relates to an aqueous emulsion containing an ethylenically unsaturated monomer unit-containing polymer (A) as a dispersoid and vinyl alcohol polymer (B) as a dispersant, wherein, the ethylenically unsaturated monomer unit-containing polymer (A) includes a structural unit derived from a radical-polymerizable ethylenically unsaturated monomer (a) having a functional group represented by the following general formula (W), and the degree of saponification of the vinyl alcohol polymer (B) is 80 mol % or more: wherein, X is an oxygen atom or sulfur atom, and * represents a bond.
    Type: Application
    Filed: December 20, 2016
    Publication date: September 17, 2020
    Applicant: KURARAY CO., LTD.
    Inventors: Tatsuya TANIDA, Keisuke MORIKAWA
  • Publication number: 20200291571
    Abstract: Disclosed is an artificial leather base material having a surface with a lightness L* value of ?50 and including a fiber base material that includes cationic dye-dyeable polyester fibers and an elastic polymer, the artificial leather base material being dyed with at least one cationic dye. Also provided is a resin layer-equipped artificial leather, a napped artificial leather, and a shoe that use the artificial leather base material is used. Also provided is a decorating sheet including the artificial leather base material, and a decorative molded body using the same.
    Type: Application
    Filed: September 13, 2017
    Publication date: September 17, 2020
    Applicant: KURARAY CO., LTD.
    Inventors: Michinori FUJISAWA, Daisuke MATSUDA, Toshiyuki ITO, Yasunori MURATE, Tetsuya ANDO, Masato WARITA, Naoto NARUMOTO
  • Publication number: 20200290249
    Abstract: The present invention relates to a waterproof component that is an insert molded body formed from a thermoplastic resin composition and a metal component, wherein the thermoplastic resin composition contains a thermoplastic resin (A) and an inorganic fibrous reinforcement (B); the content of the inorganic fibrous reinforcement (B) is 8 to 130 parts by mass based on 100 parts by mass of the thermoplastic resin (A); and the inorganic fibrous reinforcement (B) has an average fiber diameter of 10 ?m or less and an average fiber length of 300 ?m or less.
    Type: Application
    Filed: October 26, 2018
    Publication date: September 17, 2020
    Applicant: KURARAY CO., LTD.
    Inventors: Naoto SUGAI, Yuki ITO, Takaharu SHIGEMATSU
  • Publication number: 20200290300
    Abstract: Disclosed is a manufacturing method of a sheet molded article, including the steps of: thermoforming a molding sheet with a first mold, thereby molding a molded article including a body portion provided with a shape transferred from the first mold, and a peripheral edge portion surrounding the body portion; and removing the molded article from the first mold, and inverting the body portion front-to-back.
    Type: Application
    Filed: November 2, 2018
    Publication date: September 17, 2020
    Applicant: KURARAY CO., LTD.
    Inventors: Michinori FUJISAWA, Masato WARITA, Tatsuya DAIMON
  • Publication number: 20200291197
    Abstract: A resin composition contains an ethylene-vinyl alcohol copolymer (A) in which an ethylene unit content is from 10 to 60 mol %, a hindered amine-based compound (B) having a 2,2,6,6-tetraalkylpiperidine ring structure and having an alkoxy group bonded to a nitrogen atom in the structure, and a hindered phenol-based compound (C) having an ester bond or an amide bond. The resin composition contains 0.1 to 5 parts by mass of the hindered amine-based compound (B) and 0.2 to 5 parts by mass of the hindered phenol-based compound (C) with respect to 100 parts by mass of the ethylene-vinyl alcohol copolymer (A), and a mass ratio (C)/(B) is from 0.2 to 3.6.
    Type: Application
    Filed: September 13, 2017
    Publication date: September 17, 2020
    Applicant: KURARAY CO., LTD.
    Inventors: Edgard CHOW, Kentaro YOSHIDA, Tatsuya HASEGAWA
  • Patent number: 10772391
    Abstract: The present invention relates to a molded hook fastener having excellent fire retardancy and low fuming property, and having a substrate and a large number of engaging elements projecting from a surface of the substrate, wherein both the substrate and the engaging elements contain a resin composition in which a polyester-based elastomer resin (A) and a polyetherimide-based resin (B) are mixed with a weight ratio (A)/(B) in a range of 2/98 to 70/30.
    Type: Grant
    Filed: September 21, 2017
    Date of Patent: September 15, 2020
    Assignees: KURARAY FASTENING CO., LTD., KURARAY CO., LTD.
    Inventors: Atsushi Shimizu, Munenori Kumagai, Nobuhiro Koga
  • Publication number: 20200283617
    Abstract: A block copolymer or a hydrogenate thereof, containing a polymer block (A) and a polymer block (B), in which the polymer block (B) has a structural unit derived from a conjugated diene compound, the structural unit including one or more kinds of alicyclic skeletons (X) represented by a formula (X) in the main chain.
    Type: Application
    Filed: November 21, 2018
    Publication date: September 10, 2020
    Applicant: KURARAY CO., LTD.
    Inventors: Yasushi SENDA, Masahiro KATO
  • Publication number: 20200284952
    Abstract: The present invention provides a diffuser plate whose luminance of emission light emitted from a microlens is even in a diffusion range. The diffuser plate comprises a projection side main surface, an emission side main surface, and a fine structure having a plurality of microlens shape parts with a microlens-like shape. A numerical aperture NA of the projection light is greater than 0 and 0.140 or less. An incident angle ?i formed by an optical axis of the projection light at the microlens shape part and a normal of the projection side main surface intersecting with each other is in a range of 0 to 50 degrees. At least one of the plurality of microlens shape parts emits the emission light at an emission angle ?o formed by the optical axis of the emission light and the normal of the projection side main surface intersecting with each other.
    Type: Application
    Filed: October 2, 2017
    Publication date: September 10, 2020
    Applicant: KURARAY CO., LTD.
    Inventors: Atsushi UCHIDA, Masaru KARAI
  • Publication number: 20200283367
    Abstract: A method of producing a bis-acyloxylated exomethylene compound represented by general formula (III), including reacting a monoacyloxylated exomethylene compound represented by general formula (I), a carboxylic acid represented by general formula (II), and oxygen in a liquid phase in the presence of a catalyst and optionally a solvent:
    Type: Application
    Filed: July 23, 2018
    Publication date: September 10, 2020
    Applicant: KURARAY CO., LTD.
    Inventors: Yusuke MURATA, Naoya MINAMOTO, Mitsumasa KANEKO, Ryosuke SHIMIZU
  • Publication number: 20200283357
    Abstract: An apparatus for removing a sulfur-containing compound, including: a sulfur-containing compound removing part of bringing a gas to be treated containing a sulfur-containing compound into contact with an oil-soluble sulfur-containing compound absorbing agent, so as to remove the sulfur-containing compound; and a mixing part of mixing a sulfur-containing compound absorbed agent resulted from having the sulfur-containing compound absorbed to the sulfur-containing compound absorbing agent, and a non-aqueous liquid.
    Type: Application
    Filed: April 27, 2018
    Publication date: September 10, 2020
    Applicant: KURARAY CO., LTD.
    Inventors: Takuo TSURUTA, Masaki SHIMIZU, Yuusuke SAITOU
  • Patent number: 10767089
    Abstract: The present invention is a thermoplastic polymer composition which contains 10-120 parts by mass of a polar group-containing polypropylene resin (B) per 100 parts by mass of a thermoplastic elastomer (A) that is a block copolymer having a polymer block containing an aromatic vinyl compound unit and a polymer block composed of a conjugated diene unit having 40% by mole or more of 1,2-bonds and 3,4-bonds in total, or a hydrogenated product of the block copolymer (provided that a thermoplastic polymer composition containing 1 part by mass or more of a polyvinyl acetal resin is excluded). This thermoplastic polymer composition is able to be bonded with a ceramic, a metal or a synthetic resin without requiring a primer treatment, and has excellent flexibility, mechanical characteristics, moldability, heat resistance and storage stability.
    Type: Grant
    Filed: April 26, 2017
    Date of Patent: September 8, 2020
    Assignee: KURARAY CO., LTD.
    Inventors: Asako Minamide, Mikio Masuda, Masahiro Suzuki
  • Patent number: 10766978
    Abstract: A polyvinyl alcohol is produced in a method comprising: a polymerization step comprising polymerizing vinyl ester monomers by controlled radical polymerization in the presence of a radical initiator and an organic cobalt complex to obtain a polymer solution containing a polyvinyl ester; an extraction step comprising extracting a cobalt complex from the polymer solution by contacting an aqueous solution containing a water-soluble ligand with the polymer solution; and a saponification step comprising saponifying the polyvinyl ester after the extraction step to obtain a polyvinyl alcohol. A method for producing a polyvinyl alcohol is thus provided that has a narrow molecular weight distribution and a high number-average molecular weight with good hue and further good solubility in water.
    Type: Grant
    Filed: March 30, 2017
    Date of Patent: September 8, 2020
    Assignees: KURARAY CO., LTD., UNIVERSITE DE LIEGE
    Inventors: Takumi Takayama, Yusuke Amano, Kazuhiko Maekawa, Christophe Detrembleur, Antoine Debuigne, Christine Jerome
  • Publication number: 20200277456
    Abstract: Provided is an expansive refractory material that not only has excellent fire resistance but also can provide a heat insulating function for protecting a content by expanding to form a heat insulating layer when the refractory material is brought close to a heat source or comes into contact with flame. The refractory material at least includes: discontinuous reinforcing fibers having a thermal conductivity of 4 W/(m·K) or higher; and a flame-retardant thermoplastic resin, wherein the discontinuous reinforcing fibers are dispersed in the refractory material. The refractory material has a post-expansion porosity of 30% or higher.
    Type: Application
    Filed: May 19, 2020
    Publication date: September 3, 2020
    Applicant: KURARAY CO ., LTD.
    Inventors: Satoshi KATSUYA, Yosuke Washitake, Ryokei Endo, Shunsuke Suiko
  • Publication number: 20200277715
    Abstract: Disclosed is a braid comprising a core part and a sheath part, wherein the core part comprises a high strength fiber (a) having a fineness of 300 to 4,000 dtex and a tensile strength of 12 cN/dtex or more, and the sheath part comprises a colored synthetic fiber (b) having a fineness of 60 to 1,000 dtex and a tensile strength of less than 12 cN/dtex, and the sheath part has a braid-like structure. The braid has excellent mechanical strength and can be colored in various colors, and preferably hardly causes reduction in mechanical strength even when exposed to an ultraviolet ray, and which hardly causes disappearance of the applied color even when subjected to mechanical friction.
    Type: Application
    Filed: September 28, 2018
    Publication date: September 3, 2020
    Applicant: KURARAY CO., LTD.
    Inventors: Kazumasa KUSUDO, Toshiaki KOBAYASHI
  • Patent number: 10759888
    Abstract: (Meth)acrylate polymers are provided which have a narrow molecular weight distribution on a higher molecular weight side and can impart high shear viscosity stability to lubricating oils. A (meth)acrylate polymer (A) includes specific structural units and is such that in a differential molecular weight distribution curve obtained by gel permeation chromatography (GPC) measurement which shows the polystyrene-equivalent molecular weight of the (meth)acrylate polymer (A) normalized so that the intensity of the peak-top polystyrene-equivalent molecular weight M (t) is 1, the value a represented by a=Log Mh (t1/2)?Log M (t) is not more than 0.12 wherein Mh (t1/2) is the polystyrene-equivalent molecular weight at a point on a higher molecular weight side where the intensity is 0.5.
    Type: Grant
    Filed: January 12, 2017
    Date of Patent: September 1, 2020
    Assignee: KURARAY CO., LTD.
    Inventors: Fumihiko Okabe, Toru Takahashi, Atsuhiro Nakahara
  • Patent number: 10765001
    Abstract: Provided are a thermoplastic liquid crystal polymer film having an improved thermo-adhesive property, a circuit board, and methods respectively for producing the same. The thermoplastic liquid crystal polymer film has a segment orientation ratio SOR of 0.8 to 1.4 and a moisture content of 300 ppm or less. The circuit board contains a plurality of circuit board materials wherein the circuit board materials are at least one member selected from the group consisting of an insulating substrate having a conductor layer on at least one surface, a bonding sheet, and a coverlay. At least one of the circuit board materials includes a thermoplastic liquid crystal polymer film. The circuit board shows a solder heat resistance when the circuit board is placed in a solder bath at 290° C. for 60 seconds in accordance with JIS C 5012.
    Type: Grant
    Filed: March 30, 2016
    Date of Patent: September 1, 2020
    Assignee: KURARAY CO., LTD.
    Inventors: Takahiro Nakashima, Takeshi Takahashi, Minoru Onodera
  • Publication number: 20200269637
    Abstract: A bicycle tire at least includes a tread part provided to a ground contact surface of the bicycle tire and a carcass part provided inside the tread part. The bicycle tire also includes a reinforcing ply in at least one position selected from between the tread part 2 and the carcass part, inside the carcass part, and inside the tread part. The reinforcing ply at least includes a woven fabric made of polyvinyl alcohol-series fiber yarns. Each of the yarns includes a plurality of single fibers having an average fiber diameter of 45 ?m or smaller.
    Type: Application
    Filed: May 12, 2020
    Publication date: August 27, 2020
    Applicant: KURARAY CO., LTD.
    Inventors: Shinichi Takemoto, Toshiaki Kobayashi
  • Publication number: 20200263351
    Abstract: Disclosed is a napped artificial leather including: a non-woven fabric obtained by entangling fibers; and an elastic polymer, wherein a 100% modulus (A) of the elastic polymer and a content (B) of the elastic polymer satisfy the relational expression: B??1.8A+40, A>0, and the non-woven fabric has an abrasion loss (C) of 45 mg or less, in accordance with JIS L 1096 (6.17.5E method, Martindale method) under a pressing load of 12 kPa (gf/cm2) after 20000 abrasion cycles.
    Type: Application
    Filed: August 31, 2018
    Publication date: August 20, 2020
    Applicant: KURARAY CO., LTD.
    Inventors: Masashi MEGURO, Hiroyuki HISHIDA
  • Patent number: 10745598
    Abstract: The present invention is a thermoplastic polymer composition which contains 10-120 parts by mass of a polar group-containing polypropylene resin (B) per 100 parts by mass of a thermoplastic elastomer (A) that is a block copolymer having a polymer block containing an aromatic vinyl compound unit and a polymer block composed of a conjugated diene unit having 40% by mole or more of 1,2-bonds and 3,4-bonds in total, or a hydrogenated product of the block copolymer (provided that a thermoplastic polymer composition containing 1 part by mass or more of a polyvinyl acetal resin is excluded). This thermoplastic polymer composition is able to be bonded with a ceramic, a metal or a synthetic resin without requiring a primer treatment, and has excellent flexibility, mechanical characteristics, moldability, heat resistance and storage stability.
    Type: Grant
    Filed: December 9, 2019
    Date of Patent: August 18, 2020
    Assignee: KURARAY CO., LTD.
    Inventors: Asako Minamide, Mikio Masuda, Masahiro Suzuki
  • Patent number: 10744467
    Abstract: One aspect of the present invention concerns a porous hollow fiber membrane containing a vinylidene fluoride-based resin. The hollow fiber membrane has a gradient structure in which a pore diameter of pores in the hollow fiber membrane gradually becomes smaller at least toward one of inner and outer peripheral surface sides and is hydrophilized by containing a crosslinked body of a polyvinylpyrrolidone-based resin.
    Type: Grant
    Filed: February 26, 2015
    Date of Patent: August 18, 2020
    Assignee: KURARAY CO., LTD.
    Inventors: Youhei Yabuno, Tsukasa Yoshitoshi, Yusuke Hayashi