Patents Assigned to Kuraray Co., Ltd.
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Publication number: 20250059363Abstract: The present disclosure provides a resin composition containing a hydrophilic resin (A), water (B), a basic compound (C), and a polyolefin resin (D).Type: ApplicationFiled: December 14, 2022Publication date: February 20, 2025Applicant: Kuraray Co., Ltd.Inventor: Makoto SUZUKI
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Publication number: 20250059325Abstract: A composite includes a polyamide (A) and continuous fibers (B), wherein the polyamide (A) comprises a diamine unit (X) and a dicarboxylic acid unit (Y), the diamine unit (X) comprises 0.1 mol % or more and less than 36 mol % of a diamine unit (X1), and the aliphatic diamine has 6 to 10 carbon atoms, the aliphatic diamine having an alkyl group having two or three carbon atoms bonded to a carbon atom at 2-position when a carbon atom to which any one of two amino groups is bonded is taken as 1-position.Type: ApplicationFiled: December 19, 2022Publication date: February 20, 2025Applicant: KURARAY CO., LTD.Inventor: Atsushi NANYA
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Publication number: 20250059346Abstract: Provided is a polyamide composition, which has high moldability and excellent heat resistance and chemical resistance. The polyamide composition contains a polyamide (A) and an organic heat stabilizer (B), and in which the polyamide (A) contains a diamine unit (X) and a dicarboxylic acid unit (Y), the diamine unit (X) contains 0.1 mol % or more and less than 36 mol % of a diamine unit (X1), and the diamine unit (X1) is a constituent unit derived from an aliphatic diamine, in which the aliphatic diamine has 6 to 10 carbon atoms, the aliphatic diamine having an alkyl group having 2 or 3 carbon atoms bonded to a carbon atom at 2-position when a carbon atom to which any one of two amino groups is bonded is taken as 1-position.Type: ApplicationFiled: December 19, 2022Publication date: February 20, 2025Applicant: KURARAY CO., LTD.Inventors: Naoto SUGAI, Atsushi NANYA
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Publication number: 20250059306Abstract: Provided is a modified product of a hydrogenated product of a block copolymer that can be added to obtain a resin composition having an excellent balance of mechanical properties such as tensile strength, tensile strain at break, and impact resistance. A modified hydrogenated product of a block copolymer including a polymer block containing a structural unit derived from an aromatic vinyl compound and a polymer block containing a structural unit derived from a conjugated diene compound, in which the conjugated diene compound contains isoprene and a conjugated diene compound other than isoprene; the polymer block has a vinyl bonding amount of 30 mol % or less; the modified hydrogenated product has one, or two or more functional groups selected from an alkoxysilyl group, a carboxy group, an amino group, a hydroxy group, an epoxy group, and an acid anhydride-derived group, and has a peak top intensity of loss tangent of 0.95 or less and a melt flow rate (MFR) of 0.5 g/10 min or more.Type: ApplicationFiled: December 15, 2022Publication date: February 20, 2025Applicant: KURARAY CO., LTD.Inventors: Masahiro KATO, Yasushi SENDA, Ryo SATANI
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Publication number: 20250059326Abstract: Provided is a polyamide composition, which has high moldability and excellent heat resistance and chemical resistance. The polyamide composition contains a polyamide (A), a copper compound (B1) and a metal halide (B2), and in which the polyamide (A) comprises a diamine unit (X) and a dicarboxylic acid unit (Y), the diamine unit (X) contains 0.1 mol % or more and less than 36 mol % of a diamine unit (X1), and the diamine unit (X1) is a diamine unit derived from an aliphatic diamine, in which the aliphatic diamine has 6 to 10 carbon atoms, the aliphatic diamine having an alkyl group having 2 or 3 carbon atoms bonded to a carbon atom at 2-position when a carbon atom to which any one of two amino groups is bonded is taken as 1-position.Type: ApplicationFiled: December 19, 2022Publication date: February 20, 2025Applicant: KURARAY CO., LTD.Inventors: Naoto SUGAI, Atsushi NANYA
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Publication number: 20250059305Abstract: A vinyl alcohol copolymer may include a vinyl alcohol constituent unit and an olefin constituent unit vinyl alcohol having 3 to 30 carbon atoms. Such a copolymer may satisfy at least one of: a difference between a melting point and a lowest heat-sealing temperature is 45° C. or more; and the lowest heat-sealing temperature is 80° C. or less. Such a copolymer may satisfy predetermined relational formulas based on intensities and the number average molecular weight obtained from a UV absorption detector and a refractive index detector in gel permeation chromatography measurement performed on the copolymer.Type: ApplicationFiled: December 22, 2022Publication date: February 20, 2025Applicant: Kuraray Co., Ltd.Inventors: Masahiro BABA, Shinnosuke AKUTAGAWA, Shingo UEYAMA, Hiroyuki KONISHI
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Patent number: 12227607Abstract: A method of producing modified vinyl alcohol-based polymer particles, includes mixing vinyl alcohol-based polymer particles with a mixed medium containing unsaturated carboxylic acid, an acid catalyst, and water, wherein, by mixing the vinyl alcohol-based polymer particles with the mixed medium, the vinyl alcohol-based polymer particles are reacted with the unsaturated carboxylic acid to obtain modified vinyl alcohol-based polymer particles containing a vinyl ester unit represented by a formula (2) below, having a vinyl alcohol unit content based on the total constitutional units from 95 to 99.99 mol %, and having an average particle diameter from 50 to 2000 ?m. The production method does not cause the problem of the residual sulfur content derived from a liquid medium used for reaction and is also capable of modifying the vinyl alcohol-based polymer particles while maintaining the particle shape.Type: GrantFiled: March 12, 2020Date of Patent: February 18, 2025Assignee: KURARAY CO., LTD.Inventors: Yuki Tachibana, Yusuke Amano, Yuki Shimizu, Kazuhiko Maekawa
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Patent number: 12220682Abstract: An aspect of the present invention relates to composite aggregate particles, which include a fine particle compound (a1) containing at least either an amorphous titanosilicate compound or an aluminosilicate compound, and a plastic powder (a2). The plastic powder (a2) is attached to at least a part of the surface of the fine particle compound (a1). The pore volume and the average particle size D50 of the composite aggregate particles satisfy the following formula: pore volume (ml/g)?0.0010×D50 (?m)+1.60.Type: GrantFiled: March 25, 2020Date of Patent: February 11, 2025Assignee: KURARAY CO., LTD.Inventors: Shuji Kawasaki, Shuji Matsunaga, Tetsuya Hanamoto, Hiroe Yoshinobu
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Patent number: 12221550Abstract: To provide a metal particle composition having excellent oxidation resistance, which does not require a transition metal catalyst and can be applied to existing metal particles, a method for producing the metal particle composition, and a paste. The metal particle composition contains, with respect to 100 parts by mass of metal particles, 0.1 to 5 parts by mass of a compound (A) having a structure represented by the following general formula (I): in which R1 and R2 each independently represent a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, an alkenyl group having 2 to 6 carbon atoms, an aryl group, or an aralkyl group, R3 and R4 each independently represent a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, an alkoxy group, an alkenyl group having 2 to 6 carbon atoms, an alkenyloxy group, an aryl group, or an aralkyl group.Type: GrantFiled: June 30, 2021Date of Patent: February 11, 2025Assignee: KURARAY CO., LTD.Inventors: Yuki Nishijima, Daiki Noguchi, Takashi Fukumoto
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Patent number: 12214572Abstract: The problem to be solved of the present invention is to provide a modified vinyl acetal resin for an interlayer film of laminated glass having excellent transparency, impact resistance, heat resistance and molding ability. The means for solving the problem is a modified vinyl acetal resin for an interlayer film of laminated glass comprising 25 to 60 mol % of ethylene units and 24 to 71% by mol of vinyl alcohol units, based on all the monomer units constituting the resin, and having the acetalization degree of 5 mol % or more and less than 40 mol %.Type: GrantFiled: March 18, 2020Date of Patent: February 4, 2025Assignee: KURARAY CO., LTD.Inventors: Takuro Niimura, Akio Takasugi, Atsuhiro Nakahara, Yoshiaki Asanuma
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Patent number: 12218353Abstract: An object of the present invention is to provide a carbonaceous material from which an electrochemical device having a high initial electrostatic capacitance, an excellent effect of suppressing gas generation during charging and discharging, and excellent durability can be obtained, and a method for producing the carbonaceous material, an electrode active material for an electrochemical device containing the carbonaceous material, an electrode for an electrochemical device containing the electrode active material, and an electrochemical device. The present invention relates to a carbonaceous material having a BET specific surface area of 1550 to 2500 m2/g, a value of an oxygen content/hydrogen content per specific surface area of 1.00 to 2.10 mg/m2, and an electrical conductivity of 10 to 15 S/cm determined by powder resistance measurement at a load of 12 kN.Type: GrantFiled: July 14, 2020Date of Patent: February 4, 2025Assignee: KURARAY CO., LTD.Inventors: Hiroyuki Nishinami, Yumika Nishita, Shushi Nishimura
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Patent number: 12215030Abstract: The present invention relates to a carbonaceous material having a BET specific surface area of 1550 to 2500 m2/g and a value of an oxygen content/hydrogen content per specific surface area of 1.00 to 2.04 mg/m2.Type: GrantFiled: November 7, 2019Date of Patent: February 4, 2025Assignee: KURARAY CO., LTD.Inventors: Hiroyuki Nishinami, Yumika Nishita, Shushi Nishimura
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Publication number: 20250033970Abstract: The present invention relates to a carbonaceous material having a nitrogen element content of 1.0% by mass or more and a hydrogen element content of 0.1% by mass or less, both measured by element analysis, and a phosphorus element content, measured by X-ray fluorescence analysis, of 0.5% by mass or more and 2.0% by mass or less.Type: ApplicationFiled: September 27, 2022Publication date: January 30, 2025Applicant: KURARAY CO., LTD.Inventors: Keiichi NISHIMURA, Naohiro NISHIMURA, Kosuke NISHIUMI
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Publication number: 20250027269Abstract: Provided are a napped artificial leather which can restrain spontaneous elongation during the production process, enables the constant load elongation transverse/machine ratio to be set to an appropriate value even without a scrim or a liner, and is excellent in pilling resistance and appearance, and a method of producing the napped artificial leather. The napped artificial leather includes a nonwoven fabric which is an entangled body of microfine fibers, and a high-molecular elastic body attached to the nonwoven fabric, has a napped surface formed by napping the microfine fiber on at least one surface, and satisfies the following conditions (1) and (2):(1) the nonwoven fabric is composed of microfine polyester filaments and (2) the fiber density D1 in the transverse direction is from 150 to 450 fibers/mm2, the fiber density D2 in the machine direction is from 150 to 450 fibers/mm2, and D1/D2 is from 0.7 to 1.1.Type: ApplicationFiled: December 6, 2022Publication date: January 23, 2025Applicant: Kuraray Co., Ltd.Inventors: Akihisa Iwamoto, Masashi Meguro, Hiroyuki Hishida
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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