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1.发明公开
公开(公告)号：EP4425593A1
公开(公告)日：2024-09-04
申请号：EP22886577.0
申请日：2022-09-29
申请人： Kureha Corporation
发明人： IKEDA, Takuya , OKADA, Kayoko , IKEYAMA, Yasufumi
摘要： An object is to provide a binder for a positive electrode, which is a binder even in a small amount exhibiting high adhesion to an active material and a current collector. The binder for a positive electrode of a non-aqueous electrolyte secondary battery to achieve the object contains: a vinylidene fluoride polymer; and an epoxy compound having two or more epoxy groups, and the epoxy compound has an epoxy equivalent of 500 g/eq or less, and a total amount of the vinylidene fluoride polymer relative to a total number of moles of the epoxy groups in the binder for a positive electrode is 600 g/eq or more and 3000 g/eq or less.
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公开(公告)号：EP4410892A1
公开(公告)日：2024-08-07
申请号：EP22875826.4
申请日：2022-09-14
申请人： Kureha Corporation
发明人： KOBAYASHI, Takuma , SUGA, Takahiro
摘要： Provided is a technique capable of suppressing reduction in thickness of a downhole tool or a component thereof in a well at a high temperature. As a means for solving the above-mentioned issue, provided is a resin composition including: 50 parts by mass or more and 97 parts by mass or less of polyglycolic acid; 3 parts by mass or more and 50 parts by mass or less of polybutylene terephthalate; and 2 parts by mass or more and 15 parts by mass or less of a cyclic carbodiimide compound with respect to 100 parts by mass of a total amount of the polyglycolic acid and the polybutylene terephthalate.
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公开(公告)号：EP4324641A1
公开(公告)日：2024-02-21
申请号：EP22788069.7
申请日：2022-03-30
申请人： Kureha Corporation
发明人： IMAJI Makoto
IPC分类号： B32B9/00 , H01L41/047 , H01L41/113 , H01L41/193 , H01L41/29 , B32B7/025
摘要： Provided is a transparent conductive piezoelectric laminate film that achieves high transparency and low resistance. The present invention relates to a transparent conductive piezoelectric laminate film including a piezoelectric film, and a conductor layer layered on at least one surface of the piezoelectric film. The transparent conductive piezoelectric laminate film has a diffraction peak in each of a range of 21° ± 2° and a range of 31° ± 2° in X-ray diffraction measurement, and a haze value of 2.0% or less.
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公开(公告)号：EP4317285A1
公开(公告)日：2024-02-07
申请号：EP22779605.9
申请日：2022-02-16
申请人： Kureha Corporation
IPC分类号： C08K5/1539 , C08L67/04 , C08L101/16 , C08G63/664
摘要： To provide a glycolic acid copolymer composition that can be solidification- and extrusion-molded and that improves rate of decrease in thickness of the molded article during degradation. The glycolic acid copolymer composition according to an embodiment of the present invention includes a glycolic acid copolymer and a carboxylic anhydride, the glycolic acid copolymer including two or more straight macromolecular chains A, each containing a repeating unit derived from glycolic acid and being chemically bonded to a particular macromolecular chain B that is different from the macromolecular chain A, and a weight average molecular weight of the composition is 150000 or greater.
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公开(公告)号：EP4317053A1
公开(公告)日：2024-02-07
申请号：EP22775177.3
申请日：2022-03-11
申请人： Kureha Corporation
摘要： To provide a method for producing carbon quantum dots having high emission quantum yield through simple processes. A method for producing carbon quantum dots that solves the difficulty described above includes: preparing a mixture by mixing a crystalline compound containing boron, sulfur, or phosphorus, being solid at 1 atm and 25°C, and having crystallinity, and an organic compound having a reactive group; and preparing carbon quantum dots by heating the mixture at 100°C or higher and 300°C or lower substantially in the absence of a solvent. An amount of the crystalline compound in the mixture is 45 parts by mass or greater and 1000 parts by mass or less with respect to 100 parts by mass of the organic compound.
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公开(公告)号：EP4297121A1
公开(公告)日：2023-12-27
申请号：EP22756114.9
申请日：2022-02-14
申请人： Kureha Corporation
发明人： SHIKE Aya , NAGASAWA Yoshiyuki , IGARASHI Tamito
IPC分类号： H01M4/13 , H01M4/139 , H01M4/62 , H01M10/0562 , H01M10/0565
摘要： Provided are a binder solution, an electrode mixture, an electrode, and an all-solid-state battery, which use an organic solvent having low reactivity with a solid electrolyte and in which a binder easily dissolves. The binder solution for an all-solid-state battery contains: a binder made of a vinylidene fluoride polymer; and an organic solvent. The organic solvent is at least one selected from the group consisting of a cyclic ether, a ketone, and an ester. The organic solvent has a boiling point of 60°C or higher and 160°C or lower. A residual moisture content of the organic solvent is 300 ppm or less.
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公开(公告)号：EP4287324A1
公开(公告)日：2023-12-06
申请号：EP22745851.0
申请日：2022-01-25
申请人： Kureha Corporation
摘要： An object of the present application is to provide a binder for a non-aqueous electrolyte secondary battery having high adhesiveness to an active material and/or a current collector and also having high flexibility capable of withstanding bending in an electrode having a highly densified mixture layer. A binder for a non-aqueous electrolyte secondary battery, which achieves the object, contains: a vinylidene fluoride polymer having a vinylidene fluoride-derived structural unit as a main constituent component; and an additive having a specific structure, and a mass ratio of the vinylidene fluoride polymer to the additive is from 99/1 to 60/40:
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公开(公告)号：EP4129669A1
公开(公告)日：2023-02-08
申请号：EP21780232.1
申请日：2021-03-29
申请人： Kureha Corporation
发明人： IMAJI, Makoto , YAMAGUCHI, Kei
IPC分类号： B32B27/30 , H05F1/00 , H05F1/02 , H01L41/193 , H01L41/257 , H01L41/31 , B32B7/025
摘要： To provide a piezoelectric film that is less likely to be electrified and that can be safely handled. A multilayered film according to an embodiment of the present invention including: a piezoelectric film containing polyvinylidene fluoride; and a protective film including an antistatic layer, the piezoelectric film and the protective film being bonded.
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公开(公告)号：EP3979360A1
公开(公告)日：2022-04-06
申请号：EP20812918.9
申请日：2020-05-27
申请人： Kureha Corporation
IPC分类号： H01M4/13 , H01M4/139 , H01M4/62 , H01M10/052 , H01M10/0562 , H01M10/058
摘要： The present disclosure is to provide an all-solid-state battery having excellent cycle characteristics. The objective is achieved by an all-solid-state battery including: a positive electrode including a positive electrode layer, a negative electrode including a negative electrode layer, and a solid electrolyte layer arranged in between the positive electrode layer and the negative electrode layer, at least one layer selected from the group consisting of the positive electrode layer, the negative electrode layer, and the solid electrolyte layer containing a first binder in a particulate form and a second binder in a non-particulate form.
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10.发明公开
公开(公告)号：EP3943542A1
公开(公告)日：2022-01-26
申请号：EP20779568.3
申请日：2020-03-18
申请人： Kureha Corporation
摘要： Provided is a composition for an electrode mixture that can enhance adhesive strength between a current collector and an electrode mixture layer in a battery, such as a lithium-ion secondary battery. The composition for an electrode mixture according to an embodiment of the present invention contains a synthetic resin containing a vinylidene fluoride polymer in a proportion of 99 mass% or greater, and a polyisocyanate compound, in which at least some isocyanate groups are blocked by a blocking agent.
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