Patents Assigned to Kuraray Co., Ltd.
  • Patent number: 10407524
    Abstract: A copolymer comprising a structural unit (I) derived from a phosphonate monomer (1) such as diethyl methacryloyloxymethyl phosphonate and diethyl 2-methacryloyloxyethyl phosphonate, a structural unit (II) derived from a radical polymerizable monomer (2) such as methacrylic acid, acrylic acid, 8-tricyclo[5.2.1.02,6]decanyl methacrylate, and t-butyl methacrylate, and a structural unit (III) derived from methyl methacrylate, the content of phosphorus atoms derived from the phosphonate monomer (1) being not less than 1.0% by mass and less than 2.0% by mass relative to the mass of the copolymer, and a formed article comprising the copolymer.
    Type: Grant
    Filed: August 12, 2015
    Date of Patent: September 10, 2019
    Assignee: KURARAY Co., Ltd.
    Inventors: Toru Abe, Atsuhiro Nakahara, Hiroshi Ozawa
  • Patent number: 10407548
    Abstract: The present invention provides a polyamide composition for a reflector having high heat resistance and good mechanical properties, having excellent adhesion to a sealing material for an LED package, and capable of retaining a high reflectance even after exposure to heat and light intended for the production process of the LED package and the environment in which the reflector is used in the LED package, when it is molded. The present invention is a polyamide composition for a reflector, containing: 30 mass % or more of a polyamide (A) having a melting point of 280° C. or higher; and 25 mass % or more of titanium oxide (B). The total content of the polyamide (A) and the titanium oxide (B) is 75 mass % or more.
    Type: Grant
    Filed: July 1, 2013
    Date of Patent: September 10, 2019
    Assignee: KURARAY CO., LTD.
    Inventors: Kozo Tamura, Takaharu Shigematsu, Shimon Kanai
  • Patent number: 10406787
    Abstract: The present invention provides a novel multilayer structure having good gas barrier properties and good water vapor barrier properties and further having high retort resistance and a packaging material including the multilayer structure. The present invention relates to a multilayer structure including a base (X) and a layer (Y) stacked on the base (X). The layer (Y) contains an aluminum-containing compound (A) and an organic phosphorus compound (BO), and the organic phosphorus compound (BO) contains a phosphorus atom-containing functional group and at least one metal ion (Z) selected from ions of metals of Groups 1 to 12 of the periodic table, the content of the metal ion (Z) being 0.4 to 8.0 mol % relative to the content of the phosphorus atom-containing functional group.
    Type: Grant
    Filed: December 24, 2015
    Date of Patent: September 10, 2019
    Assignee: KURARAY CO., LTD.
    Inventors: Ryoichi Sasaki, Yasutaka Inubushi
  • Patent number: 10406487
    Abstract: Provided is a vinylidene fluoride porous hollow fiber membrane excellent in fouling resistance due to reduced organic substance absorbance, preferably having preferable pore structures to enable to have high permeability, high fractionation performance, and good process controllability. The membrane includes a vinylidene fluoride resin and 0.5 to 10% by weight of a hydrophilic resin, having a ratio Pi/Po of 2.5 to 50 where Pi and Po denote an average pore size on inner surface and an average pore size on outer surface, respectively, and having a pure water permeation rate satisfying the following formula: (FLUXd/FLUXw)×100?40.0 wherein FLUXd represents a pure water permeation rate (L/m2/hr/98 kPa) of the hollow fiber membrane in a dry state, and FLUXw represents a pure water permeation rate (L/m2/hr/98 kPa) of the hollow fiber membrane in a wet state.
    Type: Grant
    Filed: January 8, 2016
    Date of Patent: September 10, 2019
    Assignee: KURARAY CO., LTD.
    Inventors: Arata Ishiodori, Kensaku Komatsu, Youhei Yabuno
  • Publication number: 20190273259
    Abstract: The present invention pertains to: a non aqueous electrolyte battery binder composition containing a polyamine and a neutralized salt of an ?-olefin-maleic acid copolymer obtained through copolymerization of an ?-olefin and maleic acid; and a non aqueous electrolyte battery slurry composition, a non aqueous electrolyte battery negative electrode, and a non aqueous electrolyte battery, etc., using the non aqueous electrolyte battery binder composition.
    Type: Application
    Filed: August 9, 2016
    Publication date: September 5, 2019
    Applicant: Kuraray Co., Ltd.
    Inventors: Yuki OHTA, Toshimitsu TANAKA, Junji FUJIOKA, Jun-Sang CHO, Hideharu IWASAKI
  • Publication number: 20190273260
    Abstract: The present invention pertains to a non aqueous electrolyte battery binder composition containing a polyether and a neutralized salt of an ?-olefin-maleic acid copolymer obtained through copolymerization of an ?-olefin and maleic acid; and a non aqueous electrolyte battery slurry composition, a non aqueous electrolyte battery negative electrode, and a non aqueous electrolyte battery using the non aqueous electrolyte battery binder composition.
    Type: Application
    Filed: August 9, 2016
    Publication date: September 5, 2019
    Applicant: KURARAY CO., LTD
    Inventors: Yuki OHTA, Toshimitsu TANAKA, Junji FUJIOKA, Jun-Sang CHO, Hideharu IWASAKI
  • Publication number: 20190270864
    Abstract: An oxygen absorbing agent containing a compound (A) of formula (I): wherein X is a chalcogen atom, R1 and R2 are each any one of an alkyl group which optionally has a substituent, an alkenyl group which optionally has a substituent, an aryl group which optionally has a substituent, and an aralkyl group which optionally has a substituent, R3 and R4 are each any one of a hydrogen atom, an alkyl group which optionally has a substituent, an alkenyl group which optionally has a substituent, an aryl group which optionally has a substituent, and an aralkyl group which optionally has a substituent, and R5 is a polymerizable group; and a transition metal salt (B).
    Type: Application
    Filed: October 25, 2017
    Publication date: September 5, 2019
    Applicant: KURARAY CO., LTD.
    Inventors: Daiki NOGUCHI, Akinobu TAKEDA, Takashi FUKUMOTO
  • Patent number: 10400372
    Abstract: Use of an electrically charged nonwoven fabric that is made of a fiber predominantly composed of an amorphous polymer provides a novel filtration material having improved performance compared to that of conventional filtration materials, and having excellent heat resistance and excellent flame retardancy as well as an electrically charged nonwoven fabric for use in the filtration material. It is preferable that the surface charge density is greater than or equal to 1×10?10 coulomb/cm2. It is preferable that the collection efficiency for collecting a dust particle with a particle diameter of 1 ?m flowing at a fabric-passing velocity of 8.6 cm/second is greater than or equal to 40%, the QF value is greater than or equal to 0.05, and the decrement of the dust-particle collection efficiency after being allowed to leave at 100° C. for 24 hours is less than or equal to 10%.
    Type: Grant
    Filed: October 26, 2015
    Date of Patent: September 3, 2019
    Assignee: KURARAY CO., LTD.
    Inventors: Yasuhiro Shirotani, Ikuhisa Shiraishi
  • Patent number: 10392495
    Abstract: A composition including 100 parts by mass of a polyvinyl acetal and 30 to 70 parts by mass of a plasticizer including 0.5 to 100% by mass of a plasticizer containing a polar group and 0 to 99.5% by mass of a plasticizer containing no polar group, a total of the plasticizer containing a polar group and the plasticizer containing no polar group being 100% by mass. When the polyvinyl acetal is analyzed by HPLC using an ODS column having an inner diameter of 4 mm and a length of 1 cm, the polyvinyl acetal exhibits a first peak and a second peak derived from polyvinyl acetals. In addition, a laminated product of a layer including a polyvinyl acetal and a layer including a hydrocarbon-based polymer.
    Type: Grant
    Filed: March 22, 2013
    Date of Patent: August 27, 2019
    Assignee: KURARAY CO., LTD.
    Inventors: Yoshiaki Asanuma, Yoko Nakano
  • Publication number: 20190257957
    Abstract: A plastic scintillating fiber capable of reducing modal dispersion and improving the accuracy of identifying a position which radiation passes through. A plastic scintillating fiber includes a core and a cladding that covers an outer periphery of the core and has a lower refractive index than the core. The core uniformly contains a radiation-emitting fluorescent agent and has a refractive index distribution where the refractive index of the core is highest at a center of a cross-section and becomes lower in a parabolic manner with distance from the center toward an outer periphery.
    Type: Application
    Filed: June 16, 2017
    Publication date: August 22, 2019
    Applicant: KURARAY CO., LTD.
    Inventors: Osamu SHINJI, Ryuichi IWAKAWA
  • Patent number: 10385202
    Abstract: Provided is a thermoplastic polymer composition, including a thermoplastic elastomer (A) and a polyvinyl acetal (B), wherein the thermoplastic elastomer (A) is a styrene-based thermoplastic elastomer or an olefin-based thermoplastic elastomer. Thus, a thermoplastic polymer composition is provided that has good flexibility as a thermoplastic elastomer composition, is excellent in mechanical properties and formability, and also itself has excellent adhesion to a ceramic, a metal, or a polar polymer. In addition, provided is a shaped article in which the thermoplastic polymer composition is adhered to a ceramic, a metal, or a polar polymer, in particular a shaped article adhered to a glass.
    Type: Grant
    Filed: December 19, 2008
    Date of Patent: August 20, 2019
    Assignee: Kuraray Co., Ltd.
    Inventors: Nobuhiro Moriguchi, Shinichi Torigoe, Kazuki Tokuchi
  • Patent number: 10385201
    Abstract: A resin composite that excels in weatherability and transparency and experiences less bleed out and whitening at a high temperature, and a method for producing the resin composite, and the like are provided. Specifically, the resin composite includes: a methacrylic resin (A) that contains a structural unit derived from methyl methacrylate and that has a melt viscosity ?(A) of 1,500 to 3,500 Pa·s; and a block copolymer (B) in which a methacrylic acid ester polymer block (b2) is coupled to an acrylic acid ester polymer block (b1). The block copolymer (B) has a melt viscosity ?(B) of 75 to 1,500 Pa·s. A ratio ?(A)/?(B) is from 1 to 20. 0.1 to 3 parts by mass of a hydroxy phenyl triazine-based UV absorber is contained in 100 parts by mass of the total of the methacrylic resin (A) and the block copolymer (B).
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: August 20, 2019
    Assignee: KURARAY CO., LTD.
    Inventors: Jumpei Kodera, Kaori Maeda, Noboru Higashida
  • Publication number: 20190248115
    Abstract: Provided is a fuel container composed of a multilayer structure containing: an ethylene-vinyl alcohol copolymer (A) layer; an adhesive resin (B) layer; a high-density polyethylene (C) layer; and a resin composition (D) layer, wherein the ethylene-vinyl alcohol copolymer (A) contains 15 to 44 mol % of ethylene, the adhesive resin (B) is a maleic anhydride-modified polyolefin having an acid value of 0.1 to 10 mgKOH/g and containing 1 to 8.5 ?mol/g of magnesium element, calcium element, zinc element, or a combination thereof, the resin composition (D) contains the ethylene-vinyl alcohol copolymer (A), the adhesive resin (B), and the high-density polyethylene (C), the thickness of the (A) layer, the (B) layer, and the (C) layer satisfies specific conditions, and the ethylene-vinyl alcohol copolymer (A), the adhesive resin (B), and the high-density polyethylene (C) satisfies specific conditions. The fuel container is excellent in fuel barrier properties and impact resistance and enables stable production.
    Type: Application
    Filed: June 29, 2017
    Publication date: August 15, 2019
    Applicant: KURARAY CO., LTD.
    Inventors: Takeyuki IGARASHI, Shogo NAKAZAWA
  • Publication number: 20190249028
    Abstract: The present invention provides an aquatic organism repellent paint composition having good dispersion stability and capable of maintaining the repellent effect on aquatic organisms over a long time. The present invention relates to an aquatic organism repellent paint composition containing: a vinyl alcohol polymer (A) having a degree of saponification of more than 65 mol % and less than 88 mol %; an inorganic oxide (B); and a solvent (C).
    Type: Application
    Filed: July 5, 2017
    Publication date: August 15, 2019
    Applicants: KURARAY CO., LTD., FUJI SILYSIA CHEMICAL LTD.
    Inventors: Tadahito FUKUHARA, Keisuke MORIKAWA, Mitsuteru OGAWA, Mutsuhiro ITO, Yoshio NAKANO, Akio KAMEYAMA
  • Patent number: 10381637
    Abstract: Provided is a less hygroscopic carbonaceous material that is obtained from a plant-derived carbonaceous raw material and that, when used as a negative electrode material for a nonaqueous electrolyte secondary battery, allows the battery to exhibit good battery characteristics. Provided is a carbonaceous material for negative electrodes of nonaqueous electrolyte secondary batteries. This carbonaceous material is a particulate carbonaceous material containing carbonaceous particles. The carbonaceous material has a BET specific surface area of 1 m2/g or more and less than 20 m2/g. Each of the carbonaceous particles of the carbonaceous material has a core and a skin covering the core. The core contains a calcined product of a plant-derived carbonaceous raw material. The skin is made of a material that has higher electron emission ability upon irradiation with an electron beam than a material of the core.
    Type: Grant
    Filed: October 10, 2014
    Date of Patent: August 13, 2019
    Assignee: KURARAY CO., LTD.
    Inventors: Akira Koshima, Taketoshi Okuno, Kenichi Koyakumaru, Hideharu Iwasaki, Kenta Aoki, Makoto Imaji, Yasuhiro Tada, Naohiro Sonobe
  • Publication number: 20190241822
    Abstract: Provided is a composition for removing iron sulfide, containing, as an active ingredient, an ?,?-unsaturated aldehyde represented by the following general formula (1): wherein R1 to R3 each independently represent a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, or an aryl group having 6 to 12 carbon atoms, provided that R1 may be connected to R2 or R3, to constitute an alkylene group having 2 to 6 carbon atoms; and that R1 and R2 are not a hydrogen atom at the same time.
    Type: Application
    Filed: June 21, 2017
    Publication date: August 8, 2019
    Applicant: KURARAY CO., LTD.
    Inventors: Masaki SHIMIZU, Yuusuke SAITOU, Takuo TSURUTA, Junichi FUJI
  • Patent number: 10370525
    Abstract: [Object] The invention provides rubber compositions having excellent filler dispersibility, crosslinked products having excellent properties such as abrasion resistance, and tires that exhibit enhanced rolling resistance performance and attain simultaneous enhancements in steering stability and ice grip performance by virtue of using the compositions or the crosslinked products in portions of the tires. [Solution] The rubber composition includes 100 parts by mass of a solid rubber (A), 0.1 to 10 parts by mass of a modified liquid diene rubber (B) that is obtained by adding a modifying agent to an unmodified liquid diene rubber (B?) and has functional groups derived from the modifying agent, and 20 to 150 parts by mass of a filler (C).
    Type: Grant
    Filed: March 10, 2015
    Date of Patent: August 6, 2019
    Assignee: KURARAY CO., LTD.
    Inventors: Daisuke Koda, Kei Hirata
  • Patent number: 10370528
    Abstract: [Object] To provide an acrylic block copolymer which can be used in an adhesive composition to give an excellent adhesive force, cohesive force, holding power, tack, and hot-melt coatability; and also to provide an adhesive composition containing such a block copolymer. [Solution] An acrylic block copolymer (I) contains at least two polymer blocks (A) containing methacrylic acid ester units and at least one polymer block (B) containing acrylic acid ester units, wherein the acrylic block copolymer (I) has structure of blocks (A)-(B)-(A), a weight average molecular weight (Mw) ranging from 30,000 to 100,000 and a melt viscosity of not more than 100,000 mPa·s, the melt viscosity being measured at 100° C. with a Brookfield viscometer.
    Type: Grant
    Filed: January 21, 2016
    Date of Patent: August 6, 2019
    Assignee: KURARAY CO., LTD.
    Inventors: Kanayo Nakada, Yoshihiro Morishita
  • Patent number: 10370796
    Abstract: The paper composite contains: a paper substrate having an air permeation resistance of 1,000 sec or less and bulk density of from 0.5 to 1.0 g/cm3; and a greaseproof layer on at least one side thereof, the greaseproof layer containing an ethylene-vinyl alcohol polymer (A) and a cationic fluorine-containing polymer (B) having two specific constitutional units. A content of the copolymer (B) in the greaseproof layer is from 5 to 50 parts by mass with respect to 100 parts by mass of the polymer (A), an amount of the greaseproof layer on dry mass basis is from 0.1 to 3.0 g/m2, and a water vapor permeability of the paper composite is 1,000 g/m2·24 h or greater.
    Type: Grant
    Filed: August 19, 2015
    Date of Patent: August 6, 2019
    Assignees: KURARAY CO., LTD., AGC Inc.
    Inventors: Masako Kawagoe, Yosuke Kumaki, Sho Masuda, Junsuke Kawana
  • Publication number: 20190233600
    Abstract: A resin composition that enables formation of a film superior in cold water solubility, mechanical strength, and chemical resistance is provided. The resin composition comprises a modified PVA comprising a monomer unit represented by formula (I), and an amine compound represented by formula (II): a content of the amine compound with respect to 100 parts by mass of the modified PVA being from 0.01 parts by mass to 1 part by mass. In the formula (I), R1 represents a hydrogen atom, or an alkyl group having 1 to 8 carbon atoms; and R2 represents —R3—SO3?X+, —R3—N+(R4)3Cl?, or a hydrogen atom, R3 representing an alkanediyl group having 1 to 10 carbon atoms, X+ representing a hydrogen atom, a metal atom, or an ammonium group, and R4 representing a linear or branched alkyl group having 1 to 5 carbon atoms. In the formula (II), R5 represents —R3?—SO3?X+?, —R3?—N+(R4?)3Cl?, or a hydrogen atom.
    Type: Application
    Filed: April 8, 2019
    Publication date: August 1, 2019
    Applicant: KURARAY CO., LTD.
    Inventors: MASAHIRO TAKAFUJI, Masaki Kato, Yoko Mori