Patents Assigned to Kuraray Co., Ltd.
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Patent number: 12199286Abstract: The present invention relates to an additive for an electrochemical element positive electrode comprising an activated carbon, wherein the activated carbon has a specific surface area in accordance with BET method of 1300-2500 m2/g, a pore volume of pores having a diameter of 2 nm or more of 0.35 cm3/g or less, a pore volume of pores having a diameter less than 2 nm of 0.5 cm3/g or more, and an ash content of 0.5% by weight or less.Type: GrantFiled: March 12, 2021Date of Patent: January 14, 2025Assignee: KURARAY CO., LTD.Inventors: Kengo Tachikawa, Mao Takayama, Yoshihisa Inui, Hiroyuki Nishinami, Yumika Nishita, Shushi Nishimura
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Patent number: 12195913Abstract: Disclosed is a grain-finished leather-like sheet including: a fiber base material; and a polyurethane skin film stacked, as a surface layer, directly on the fiber base material or via another polyurethane layer, wherein the polyurethane skin film contains at least one of a diketopyrrolopyrrole-based red pigment and an ?-type phthalocyanine-based blue pigment, the grain-finished leather-like sheet further includes a clear polyurethane film layer coating the polyurethane skin film, and the grain-finished leather-like sheet has a grade of color difference, determined using a Grey scale for assessing staining, of 4-5 or more, when 0.03 g of oleic acid is added dropwise to a surface of the clear polyurethane film layer, and thereafter a white cotton fabric is reciprocated 100 times on the surface, using a crockmeter.Type: GrantFiled: March 11, 2020Date of Patent: January 14, 2025Assignee: KURARAY CO., LTD.Inventors: Tetsuya Ashida, Kansai Hara
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Publication number: 20250012007Abstract: An aqueous adhesive using an adhesive component that does not contain resorcin and formalin, particularly an aqueous adhesive that is excellent in adhesiveness to fibers and an elastomer and can suppress process contamination in a process of producing reinforcing fibers, reinforcing fibers using the same, and an elastomer product using the reinforcing fibers are provided. An aqueous adhesive for adhesion between fibers and an elastomer includes: an oil-in-water emulsion (A) containing a liquid conjugated diene-based rubber and a surfactant, and an aqueous solution or aqueous dispersion (B) of a crosslinking agent.Type: ApplicationFiled: November 11, 2022Publication date: January 9, 2025Applicant: KURARAY CO., LTD.Inventors: Toru Asada, Eiichi Ishida, Yosuke Washitake
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Publication number: 20250011552Abstract: Provided are reinforcing fibers using an adhesive component that does not contain resorcin and formalin, particularly reinforcing fibers that are excellent in adhesiveness to a high-polar rubber adherend, a method for producing the same, and an elastomer product using the reinforcing fibers. Reinforcing fibers include an adhesive layer formed from an adhesive component containing a liquid conjugated diene-based rubber and a crosslinking agent on at least a part of a fiber surface, and a solubility parameter (SP value) of the liquid conjugated diene-based rubber that is calculated by a Fedors method is larger than 9.0 (cal/cm3)1/2.Type: ApplicationFiled: November 11, 2022Publication date: January 9, 2025Applicant: KURARAY CO., LTD.Inventors: Toru Asada, Eiichi Ishida, Yosuke Washitake
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Patent number: 12187884Abstract: An oil-resistant film may be provided by an oil-resistant base material that is excellent in the oil resistance even in not only a plane part but also a bent part of a package can be obtained and also to the provision of an oil-resistant base material having the oil-resistant film and an oil-resistant paper having the oil-resistant film. An oil-resistant film may contain a polyvinyl alcohol-based polymer (A) and a polymer particle (B) containing a polymer having a glass transition temperature of 40° C. or lower, wherein the content of the polymer particle (B) is 1 part by mass or more and less than 150 parts by mass based on 100 parts by mass of the polyvinyl alcohol-based polymer (A); and an oil-resistant base material (oil-resistant paper) having the oil-resistant film on a base material (paper).Type: GrantFiled: December 20, 2019Date of Patent: January 7, 2025Assignee: KURARAY CO., LTD.Inventors: Kenta Toshinari, Yuki Fujii, Atsushi Inatomi, Akio Fujita
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Patent number: 12186855Abstract: Disclosed is a polishing pad including a polishing layer having a polishing surface, wherein the polishing surface includes a deep-groove region having a first pattern formed by a deep groove or hole having a depth of 0.3 mm or more, and a land region that is a region other than the deep-groove region, and the land region includes shallow recesses having a second pattern and a depth of 0.01 to 0.1 mm, and a plurality of island-like land portions surrounded by the shallow recesses and having a maximum distance in a horizontal direction of 8 mm or less.Type: GrantFiled: June 4, 2020Date of Patent: January 7, 2025Assignee: KURARAY CO., LTD.Inventors: Mitsuru Kato, Hirofumi Kikuchi, Chihiro Okamoto, Shinya Kato
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Publication number: 20250001366Abstract: One aspect of the present invention relates to a porous membrane having a porous structure, wherein when a fractal dimension is calculated under a plurality of conditions including at least two or more conditions, the fractal dimension being to be calculated from image data obtained by photographing a porous structure on a cut section formed by cutting the porous membrane on a discretionary section in which at least the porous structure is observed, at a discretionary photographing position and a discretionary photographing magnification at which at least the porous structure of the membrane section is observed, all of the fractal dimensions calculated under each of the plurality of conditions are 1.5 or more and 1.9 or less.Type: ApplicationFiled: October 25, 2022Publication date: January 2, 2025Applicant: KURARAY CO., LTD.Inventors: Youhei YABUNO, Kazuki MATSUMOTO, Naoki MIYAGAWA, Yoshito MIZUMOTO
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Publication number: 20250006888Abstract: The present invention relates to an electrode including at least graphite, a binding agent, and a non-graphitic carbonaceous material, in which, in a half-cell produced with the electrode as a working electrode, Li foil as a counter electrode, and a solution in which lithium hexafluorophosphate is dissolved at a concentration of 1 mol/L in a mixed solution of ethylene carbonate/dimethyl carbonate/ethyl methyl carbonate at a volume ratio of 1/1/1, as an electrolytic solution: (A) a ratio of an area of a region A to an area of a region B (A/B) is 4.0% or more, in which the areas are calculated based on the following reference points in a cyclic voltammogram obtained by doping the electrode with lithium until a cell voltage of 0.01 V is achieved, and then sweeping the cell voltage from +0.01 V to ?0.05 V toward the reduction side and further sweeping the cell voltage to +0.5 V toward the oxidation side at a sweeping rate of 0.Type: ApplicationFiled: November 15, 2022Publication date: January 2, 2025Applicant: KURARAY CO., LTD.Inventors: Yuki HASENAKA, Kengo TACHIKAWA
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Patent number: 12172408Abstract: Provided are a metal clad laminate and a method for producing the same. The metal clad laminate at least includes a thermoplastic liquid crystal polymer film and a metal sheet bonded to each other, wherein the thermoplastic liquid crystal polymer film has a surface with a glossiness (20°) of 55 or higher in accordance with JIS Z 8741 on the opposite side of the bonding surface to the metal sheet. The method for producing a metal clad laminate at least includes: providing a thermoplastic liquid crystal polymer film 2 and a metal sheet 6; and introducing the thermoplastic liquid crystal polymer film 2 and the metal sheet 6 between a pair of heating rolls so as to laminate them.Type: GrantFiled: October 4, 2019Date of Patent: December 24, 2024Assignee: Kuraray Co., Ltd.Inventors: Takahiro Nakashima, Takeshi Takahashi, Masataka Shintani, Minoru Onodera
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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: 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: 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: 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: 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: 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: 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: 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: 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