Patents Assigned to Kuraray Co., Ltd.
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Publication number: 20240417332Abstract: A porous formed plate includes 35 to 70% by mass of a substance not involved in a pozzolanic reaction; 20 to 61.5% by mass of a cement; 1 to 3% by mass of synthetic fibers; and 2.5 to 7% by mass of a pulp, wherein, in a pore size distribution of the formed plate that is determined by a mercury intrusion method, a ratio (B)/(A) of a pore volume (B) in a range of 6 to 560 nm with respect to a pore volume (A) in a range of 660 to 9,100 nm is 1.70 to 6.0.Type: ApplicationFiled: October 31, 2022Publication date: December 19, 2024Applicant: Kuraray Co., Ltd.Inventors: Yoshinori Hitomi, Akira Imagawa, Atsuhisa Ogawa, Satoshi Katsuya, Saburo Hada
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Publication number: 20240417511Abstract: Provided is a liquid crystal polyester fiber that suppresses gas generation during heating and has excellent hue. The liquid crystal polyester fiber has a total amount of carboxy end groups (total CEG amount) of 5.0 mEq/kg or less and a ketone bond amount of 0.05 mol % or less. For example, the liquid crystal polyester fiber may have a melting point of 380° C. or lower. In addition, the liquid crystal polyester fiber may have a tenacity of lower than 18 cN/dtex. Moreover, the liquid crystal polyester fiber may contain a liquid crystal polyester having a structural unit derived from 4-hydroxybenzoic acid at a proportion of 50 mol % or more.Type: ApplicationFiled: September 29, 2022Publication date: December 19, 2024Applicant: KURARAY CO., LTD.Inventors: Yukihiro TERAMOTO, Takuya TSUJIMOTO, Hideki KAMADA
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Publication number: 20240413276Abstract: A leather-like light-emitting display device can include a leather-like sheet that is a laminate of a colored resin layer forming an outer surface layer, and a fiber substrate; a light-emitting portion disposed below the leather-like sheet; and a light-blocking portion configured to partially limit transmission of light, and interposed between any layers from the colored resin layer to the light-emitting portion. The leather-like light-emitting display device is configured to exhibit light-emitting display with a luminance Ya of 200 cd/m2 or less in a non-light emitting region corresponding to the light-blocking portion and a luminance Yb of 100 to 2,000 cd/m2 in a light-emitting region corresponding to a portion other than the light-blocking portion, both as measured from a surface of the colored resin layer, and Yb/Ya being 2.0 or more.Type: ApplicationFiled: October 4, 2022Publication date: December 12, 2024Applicant: Kuraray Co., Ltd.Inventors: Daisuke Matsuda, Masato Warita, Norio Makiyama
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Publication number: 20240409738Abstract: Provided is a resin composition containing a polylactic acid polymer and a ?-methyl-?-valerolactone polymer.Type: ApplicationFiled: October 20, 2022Publication date: December 12, 2024Applicant: KURARAY CO., LTD.Inventors: Muneki ISHIO, Yuki SANO, Yusaku HOSAKA
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Publication number: 20240409697Abstract: A polyamide block copolymer that includes: a polymer block (A) having 50 mol % or more of a constituent unit derived from polyamide; and a polymer block (B) having 50 mol % or more of a constituent unit derived from at least one of a polyether and a polyester, in which the polymer block (B) has a glass transition temperature of 20° C. or lower and the polyamide block copolymer has a melting point of 230° C. or higher.Type: ApplicationFiled: October 26, 2022Publication date: December 12, 2024Applicant: KURARAY CO., LTD.Inventor: Daiki MINAMIGUCHI
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Publication number: 20240409794Abstract: Provided is a creping adhesive that is favorable in a thread-forming property, wet adhesiveness, and the like. A creping adhesive contains a PVA (A), wherein at least one of (i) and (ii) below is satisfied. (i) The PVA (A) includes a PVA having a minimum degree of branching of 0.25 or more and 0.93 or less within a range of an absolute molecular weight being 200,000 or more and 800,000 or less, and a ratio Mw/Mn of a weight-average molecular weight Mw to a number-average molecular weight Mn of the PVA (A) is 2.5 or more. (ii) The ratio Mw/Mn of the weight-average molecular weight Mw to the number-average molecular weight Mn of the PVA (A) is 3.8 or more.Type: ApplicationFiled: September 30, 2022Publication date: December 12, 2024Applicant: Kuraray Co., Ltd.Inventors: Yuta TAOKA, Misuzu FUJIMORI
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Patent number: 12161991Abstract: The present invention relates to an activated carbon, having a pore volume (A) of 0.3 to 0.7 mL/g at a pore diameter of 6.5 to 50 nm as determined by mercury intrusion porosimetry, a pore volume (B) of 0.23 mL/g or less at a pore diameter of 750 to 4,000 nm as determined by mercury intrusion porosimetry, and a pore volume ratio (A)/(B) of 1.7 or higher.Type: GrantFiled: February 14, 2020Date of Patent: December 10, 2024Assignee: KURARAY CO., LTD.Inventors: Hiroaki Kitatomi, Mitsunori Nishita, Mitsunori Hitomi, Takayuki Yamada
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Publication number: 20240400391Abstract: The present invention relates to a carbonaceous material having a nitrogen element content, measured by element analysis, of 1.0% by mass or more, and a phosphorus element content, measured by X-ray fluorescence analysis, of 0.5% by mass or more.Type: ApplicationFiled: September 27, 2022Publication date: December 5, 2024Applicant: KURARAY CO., LTD.Inventors: Keiichi NISHIMURA, Naohiro NISHIMURA, Kosuke NISHIUMI
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Publication number: 20240397851Abstract: The present invention relates generally to an aqueous seed coating composition based on a specific polyvinyl alcohol copolymer resin as a binder plus a hydrophobic pesticide additive, and seeds coated with such coating composition, which coated seeds have a desirable combination of bulk low dusting, bulk seed flowability and good germination characteristics.Type: ApplicationFiled: August 9, 2024Publication date: December 5, 2024Applicant: KURARAY CO., LTD.Inventors: Ghebrehiwet GHEBREMESKEL, Masaki KATO, Levi NEUFELD
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Publication number: 20240399530Abstract: A thermoplastic polyurethane for polishing layer, in which a D hardness after saturated and swollen by water of 50° C. in a sheet with a thickness of 2 mm is less than 50, and a contact angle with water in a sheet with a thickness of 200 ?m is 70° or less.Type: ApplicationFiled: September 27, 2022Publication date: December 5, 2024Applicant: KURARAY CO., LTD.Inventors: Azusa SUNAYAMA, Yuko GOSHI, Mitsuru KATO
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Publication number: 20240398961Abstract: A sterilized dry hydrogel-forming article containing a crosslinked product of a vinyl alcohol polymer having a bioactive substance conjugated thereto. A hydrogel containing a crosslinked product of a vinyl alcohol polymer having an ethylenically unsaturated group and a carboxy group and a bioactive substance having an amino group, the carboxy group of the crosslinked product and the amino group of the bioactive substance being covalently bound via an amide bond.Type: ApplicationFiled: August 17, 2022Publication date: December 5, 2024Applicant: KURARAY CO., LTD.Inventors: Akio FUJITA, Satoru AYANO, Goro KOBAYASHI
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Publication number: 20240399720Abstract: The present invention relates to a multilayer structure for storing or transporting a gas comprising hydrogen, wherein the multilayer structure comprises at least three layers comprising an inner layer comprising at least one first polymer, a middle layer comprising ethylene-vinyl alcohol copolymer, and an outer layer comprising at least one second polymer, and wherein the water-vapour transmission rate of the inner layer is lower than that of the outer layer. The multilayer structure has excellent hydrogen gas barrier properties. Therefore, the multilayer structure is suitable for a hydrogen storage vessel and a hydrogen transportation pipe.Type: ApplicationFiled: September 16, 2022Publication date: December 5, 2024Applicant: Kuraray Co., Ltd.Inventors: Hiroyuki SHIMO, Yannick GEBOES, Naomi WINCKELMANS
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Publication number: 20240399721Abstract: Present disclosure provides a multilayer structure including a layer structure (X) and a layer structure (Y) which are laminated via a water-soluble layer (A).Type: ApplicationFiled: September 22, 2022Publication date: December 5, 2024Applicant: Kuraray Co., Ltd.Inventors: Satoshi ISHIUCHI, Kentaro YOSHIDA
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Publication number: 20240383097Abstract: Disclosed is a polishing pad including a polishing layer that is a molded body of a polyurethane composition, wherein the polyurethane composition contains 90 to 99.9 mass % of a thermoplastic polyurethane including a non-alicyclic diisocyanate unit as an organic diisocyanate unit, and 0.1 to 10 mass % of a hygroscopic polymer, and the molded body has a hardness of 60 or more and less than 75, as measured with a type-D durometer compliant with JIS K 7215.Type: ApplicationFiled: September 22, 2022Publication date: November 21, 2024Applicant: KURARAY CO., LTD.Inventors: Yuko GOSHI, Mitsuru KATO, Takashi SUGIOKA
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Publication number: 20240384017Abstract: A polyvinyl alcohol resin containing a polyvinyl alcohol as a substantially sole polymer component, wherein the polyvinyl alcohol resin has: an absorbance Abs320 at an optical path length of 10 mm and a wavelength of 320 nm being 0.09 or more, when prepared into a 0.1% by mass aqueous solution; a ratio (Abs320/Abs370) of the absorbance Abs320 to an absorbance Abs370 at an optical path length of 10 mm and a wavelength of 370 nm being 4.9 or less, when prepared into the 0.1% by mass aqueous solution; and a total content of divalent metal elements and trivalent metal elements being less than 30 ?mol/g.Type: ApplicationFiled: July 26, 2022Publication date: November 21, 2024Applicant: Kuraray Co., Ltd.Inventor: Kazuma FUJITA
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Patent number: 12144402Abstract: A water-soluble male-type molded hook-and-loop fastener includes a substrate and a plurality of male-type engaging elements, arranged in rows, protruding from the substrate surface. The engaging elements have a shape rising from the substrate surface and curving mid-course in a row direction, or a shape rising from the substrate surface, branching forward and backward mid-course in the row direction and curving in the row direction, with tip portions oriented toward the substrate surface in either shape. The substrate and the engaging elements both contain a mixture of a polyvinyl alcohol, 5 to 30 parts by mass of a polyhydric alcohol- or ethylene oxide-based polymer, and 3 to 20 parts by mass of a layered inorganic particle, based on 100 parts by mass of the polyvinyl alcohol. The polyvinyl alcohol has a degree of polymerization of 300 to 700 and a degree of saponification of 60 to 80% by mole.Type: GrantFiled: February 26, 2021Date of Patent: November 19, 2024Assignees: KURARAY FASTENING CO., LTD., KURARAY CO., LTD.Inventors: Nobuhiro Koga, Hideki Kamada, Satoru Ono, Yoshikatsu Fujisawa
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Publication number: 20240376006Abstract: A cement composition containing a fluid loss control agent and a cement, wherein the fluid loss control agent contains a vinyl alcohol polymer and a crosslinking agent, and a swelling percentage of the fluid loss control agent is 200% or more and 3,600% or less.Type: ApplicationFiled: September 9, 2022Publication date: November 14, 2024Applicant: Kuraray Co., Ltd.Inventors: Takuma KANESHIMA, JungYong KIM, Ghebrehiwet GHEBREMESKEL, Keisuke MORIKAWA
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Publication number: 20240375239Abstract: Disclosed is a polishing pad including a polishing layer that is a molded body of a polyurethane composition, wherein the polyurethane composition contains 90 to 99.9 mass % of a thermoplastic polyurethane including a non-alicyclic diisocyanate unit as an organic diisocyanate unit, and 0.1 to 10 mass % of a hygroscopic polymer, and the molded body has a hardness of 75 to 90, as measured with a type-D durometer compliant with JIS K 7215.Type: ApplicationFiled: September 22, 2022Publication date: November 14, 2024Applicant: KURARAY CO., LTD.Inventors: Yuko GOSHI, Mitsuru KATO, Takashi SUGIOKA
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Patent number: 12138891Abstract: A leather-like sheet includes: a fiber base material; an intermediate resin layer stacked on one surface of the fiber base material; and a surface resin layer stacked on the intermediate resin layer. The surface resin layer contains a polyether-based polyurethane and spherical fine particles having a heat resistance at 200° C., and has a content ratio of the spherical fine particles of 5 to 40 mass %. The spherical fine particles have a specific heat of 0.95 kJ/(kg·K) or more, a particle size D50 (median diameter) at a cumulative distribution of 50 vol %, of 2.5 to 10 ?m, and a particle size D10 at a cumulative distribution of 10 vol % of the spherical fine particles which satisfies a condition that a particle size dispersity D50/D10?3.Type: GrantFiled: December 3, 2020Date of Patent: November 12, 2024Assignee: KURARAY CO., LTD.Inventor: Masato Warita
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Patent number: 12138615Abstract: A polymer represented by the following general formula (I): wherein X1, X2, and X3 each represent a chalcogen atom, R1 and R2 each independently represent any one selected from the group consisting of a hydrogen atom, an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 2 to 18 carbon atoms, and an aralkyl 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 alkenyl group having 2 to 6 carbon atoms, an aryl group, and an aralkyl group, R5 and R6 each independently represent any one selected from the group consisting of a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, an alkenyl group having 2 to 6 carbon atoms, an aryl group, and an aralkyl group, R7 represents a hydrogen atom or a methyl group, R8 represents any one selected from the group consisting of a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, an alkenyl group having 2 to 6 carbon atoms, an aryl group, and an aralkyl group, nType: GrantFiled: February 20, 2020Date of Patent: November 12, 2024Assignee: KURARAY CO., LTD.Inventors: Daiki Noguchi, Takashi Fukumoto, Yuki Nishijima