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公开(公告)号：US11594734B2
公开(公告)日：2023-02-28
申请号：US16966970
申请日：2018-10-29
申请人： KUREHA CORPORATION
发明人： Kenta Aoki , Shota Kobayashi , Kana Ashida
IPC分类号： H01M4/62 , C08F214/22 , H01M4/04 , H01M4/36 , H01M4/66 , H01M10/0525
摘要： As a novel vinylidene fluoride polymer and its use, provided are a binder composition, an electrode mixture, an electrode, and a non-aqueous electrolyte secondary battery including the vinylidene fluoride containing the vinylidene fluoride polymer. The vinylidene fluoride polymer includes a first structural unit derived from vinylidene fluoride and a second structural unit derived from a monomer other than vinylidene fluoride. The monomer to be the second structural unit is a primary amine, a secondary amine, or a tertiary amine having at least one of a hydroxyl group and a carboxyl group, and the content of the second structural unit is from 0.05 to 20 mol % when the total of structural units derived from all the monomers constituting the vinylidene fluoride polymer is 100 mol %.
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公开(公告)号：US11542382B2
公开(公告)日：2023-01-03
申请号：US16493782
申请日：2017-11-30
申请人： Kureha Corporation
IPC分类号： H01M10/0525 , C08K3/22 , H01M10/0565
摘要： The present invention provides a gel-like electrolyte having excellent electrolyte solution retention ability. The resin composition contains an electrolyte composition containing a solvent and an electrolyte and a vinylidene fluoride copolymer. The vinylidene fluoride copolymer is a copolymer of vinylidene fluoride and a comonomer represented by Formula (1) below, wherein R1 and R2 are each independently a hydrogen atom or a fluorine atom, R3 is a hydrogen atom, a fluorine atom, or an alkyl group having from 1 to 5 carbons, and R4 is a basic group that is capable of forming an intermolecular hydrogen bond.
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公开(公告)号：US20220281822A1
公开(公告)日：2022-09-08
申请号：US17597402
申请日：2020-06-15
申请人： Kureha Corporation
IPC分类号： C07D233/84 , A01P21/00 , A01N43/50 , A01G7/06
摘要： In order to provide a plant growth regulator with an excellent plant growth promoting effect, the plant growth regulator of the present invention includes a compound represented by Formula (I) or its tautomer, or an agrochemically acceptable salt thereof. where R1 and R2 each independently represent a hydrogen atom or an alkyl group having from 1 to 4 carbon atoms, and R3 to R5 each independently represent an alkyl group having from 1 to 4 carbon atoms.
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公开(公告)号：US20220204700A1
公开(公告)日：2022-06-30
申请号：US17597377
申请日：2020-03-19
申请人： Kureha Corporation
发明人： Kenji SUZUKI , Hiroshi SAKABE , Michihisa MIYAHARA
IPC分类号： C08G75/025
摘要： A method of producing a PAS according to an embodiment of the present invention includes: a polymerizing step; a water removal step; a hydrogen sulfide recovering step in which hydrogen sulfide contained in a gas component produced in the water removal step is absorbed and recovered by an aqueous solution of an alkali metal hydroxide; and a condensation step in which the gas component produced in the water removal step is condensed. The hydrogen sulfide recovering step is performed before the condensation step.
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公开(公告)号：US11345124B2
公开(公告)日：2022-05-31
申请号：US16345824
申请日：2018-01-16
申请人： Kureha Corporation
发明人： Ichiro Kitada , Tadayoshi Itoh , Shota Nambu
摘要： A heat-shrinkable multilayer film according to the present invention is obtained by laminating an inner surface layer that contacts contents, an adhesive layer, and an intermediate layer that is adjacent to the adhesive layer, in this order from an inner side to an outer side. The inner surface layer contains an ethylene-vinyl acetate copolymer, the adhesive layer contains an acid-modified ethylene-based copolymer, and the intermediate layer contains a polyamide-based resin.
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公开(公告)号：US11322744B2
公开(公告)日：2022-05-03
申请号：US16348216
申请日：2017-11-09
申请人： Kureha Corporation
发明人： Kenta Aoki , Shoko Aoki , Shota Kobayashi , Yasuhiro Tada
IPC分类号： H01M4/62 , H01M4/131 , H01M4/505 , H01M4/525 , H01M4/1391 , H01M4/36 , H01M10/0525 , H01M4/02
摘要： To provide an electrode mixture that suppresses gelling of an electrode mixture slurry and maintains a high binding capacity between an electrode active material and a current collector even after an extended period of time has elapsed since an electrode mixture slurry was produced. The electrode mixture includes: a binder composition—containing a first copolymer of vinylidene fluoride and a polar group-containing compound; and a second copolymer of vinylidene fluoride and chlorotrifluoroethylene—; and an electrode active material of lithium oxide having a pH of water when extracted with water of not less than 10.5.
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公开(公告)号：US20220089815A1
公开(公告)日：2022-03-24
申请号：US17309924
申请日：2019-12-12
申请人： Kureha Corporation
发明人： Toshiyuki KURIU , Tasutaka SUZUKI
摘要： A method for continuously producing an aromatic polyether according to the present invention includes simultaneously implementing: a supply step of supplying a polymerization solvent, an alkali metal compound, and a raw material; a polymerizing step; and a movement step. The alkali metal compound is supplied as an aqueous mixture. According to the present invention, clogging of piping in the continuous production apparatus can be suppressed, and the aromatic polyether can be stably obtained.
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公开(公告)号：US11280153B2
公开(公告)日：2022-03-22
申请号：US16615950
申请日：2018-07-09
申请人： Kureha Corporation
发明人： Seishiro Kobayashi , Teruaki Yoshii
IPC分类号： E21B33/12
摘要： A plug which does not cause an adverse effect such as failure of a member constituting the plug when a wellbore is plugged. The downhole plug (10) includes a mandrel (1) having a hollow structure, a sealing member (2) attached to an outer circumferential surface of the mandrel (1) and being deformable by exerted pressure, and a socket (3) attached, adjacent to the sealing member (2), onto the outer circumferential surface of the mandrel (1), downstream of where the pressure is exerted on the sealing member (2). An inner circumferential edge (31a) of the socket (3) which comes in contact with the mandrel (1) protrudes toward the sealing member (2).
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公开(公告)号：US11185840B2
公开(公告)日：2021-11-30
申请号：US16314514
申请日：2018-10-11
申请人： Kureha Corporation
摘要： The present invention provides a continuous polymerization apparatus capable of simply and efficiently separating a polymer and solid matter from a reaction mixture while having an apparatus configuration conducive to washing and maintenance, and a continuous production method for a polymer. A continuous polymerization apparatus (100) includes a plurality of reaction vessels (1a to 1c), wherein the plurality of reaction vessels are configured such that reaction mixtures (9a to 9c) successively move through each reaction vessel; in the plurality of reaction vessels, gas phase parts formed above the reaction mixture communicate with one another; and the continuous polymerization apparatus includes a washing part (5), the washing part configured to separate a solid included in the reaction mixture by sedimentation and to perform countercurrent washing.
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10.发明申请公开(公告)号：US20210367137A1
公开(公告)日：2021-11-25
申请号：US16969605
申请日：2018-10-19
申请人： Kureha Corporation
发明人： Yusuke SATO , Hisaaki TERASHIMA , Nobufumi SATO , Kazuyuki KANNO , Keiko AITA
IPC分类号： H01L41/193 , C08J5/18 , B29C71/02 , H01L41/45
摘要： To provide a piezoelectric body film that can suppress decrease in the piezoelectric constant d31, a method of producing a piezoelectric body film, and a piezoelectric body device. A piezoelectric body film comprising a fluororesin as a piezoelectric material, the fluororesin containing, as a main constituent unit, a repeating unit derived from vinylidene fluoride, a piezoelectric constant d31 of the piezoelectric body film being 20 pC/N or greater, and an extrapolated onset temperature at start of shrinkage determined by TMA measurement being not lower than 90° C. and not higher than 115° C. The difference between piezoelectric constants d31 measured before and after heating the piezoelectric body film at 100° C. for 24 hours relative to the piezoelectric constant d31 before the heating for 24 hours is 20% or less.
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