公开(公告)号：US20190300676A1

公开(公告)日：2019-10-03

申请号：US16063814

申请日：2016-12-14

Applicant: Kureha Corporation

Inventor： Takuma KOBAYASHI ,  Hikaru SAIJO ,  Fuminori KOBAYASHI ,  Takeo TAKAHASHI

IPC: C08K5/42 ,  E21B33/12

Abstract: A composition for downhill tool, a degradable rubber member for downhole tool, a downhole tool, and a well drilling method are provided which contribute to cost reduction and process shortening and can contribute to improvement of production efficiency. The composition comprises a degradable rubber and a decomposition accelerator and comprises 0.1 to 20 parts by mass of at least one type of compound represented by the following general formula (I) per 100 parts by mass of the degradable rubber, the composition for a down hole tool includes the same, the degradable rubber member for down hole tool includes the same, and a well drilling method using the same. (In formula (I), R is an alkyl group having from 2 to 6 carbons.)

公开(公告)号：US10414565B2

公开(公告)日：2019-09-17

申请号：US14888465

申请日：2014-04-28

Applicant: Kureha Corporation

Inventor： Tadayoshi Itoh ,  Yuta Sekiya ,  Hisanori Tobita

IPC: B65D71/08 ,  B32B27/30 ,  B32B27/34 ,  B32B27/36 ,  B29C48/10 ,  B29C48/00 ,  B29C48/88 ,  B29C48/91 ,  B32B27/28 ,  B29C55/28 ,  B32B27/08 ,  B65B53/04 ,  B65D65/38 ,  A23L13/00 ,  B32B27/20 ,  B29C48/08 ,  B29K105/00

Abstract: A heat-shrinkable multilayer film for being filled with contents, comprising an outer surface layer (A) comprising a heat-resistant thermoplastic resin, an intermediate layer (B) comprising a polyamide-based resin, an inner surface layer (D) comprising an ethylene-based copolymer, and adhesion strength between inner surface layers after treatment with 80° C. hot water being not less than 10 N/15 mm. The polyamide-based heat-shrinkable multilayer film obtained in this manner has optimal characteristics for applications that primarily require strength, and has greatly improved self-weldability demanded in packaging films for meat products such as fresh and processed meats.

公开(公告)号：US10407551B2

公开(公告)日：2019-09-10

申请号：US15872210

申请日：2018-01-16

Applicant: Kureha Corporation

Inventor： Kenji Suzuki ,  Michihisa Miyahara ,  Hiroshi Sakabe

IPC: C08G75/0209 ,  C08G75/0254 ,  C08G75/0259 ,  C08F28/04 ,  C08F2/06 ,  C08F6/12 ,  C08G75/0281

Abstract: To provide a polyarylene sulfide (hereinafter, PAS) manufacturing method and PAS manufacturing device that further eliminates processing costs in manufacturing PAS, by recovering from solid content containing an unreacted sulfur source and alkali metal halide produced as a byproduct the sulfur source and the solid content with a reduced amount of the sulfur source, and then conveniently and easily reusing the unreacted sulfur source without performing a large-scale process. A method of manufacturing PAS according to the present invention comprises: a polymerizing step of producing PAS; an extracting step of bringing an extraction solvent into content with solid content produced in the polymerizing step, and extracting at least a portion of a sulfur source from the solid content; a recovering step of separating and recovering the solid content passing through the extracting step and an extraction liquid produced in the extracting step; and a recycling step of supplying at least a portion of the extraction liquid preferably as at least a portion of PAS produced raw material in the polymerizing step; where the extraction solvent is (1) a protic organic solvent or (2) a mixed solvent containing water and an organic solvent, and the amount of the sulfur source in the solid content recovered in the recovering step is 2 parts by mass or less with regard to 100 parts by mass of the alkali metal halide.

公开(公告)号：US10196486B2

公开(公告)日：2019-02-05

申请号：US15327472

申请日：2015-08-03

Applicant: Kureha Corporation

Inventor： Michihisa Miyahara ,  Hirohito Kawama ,  Koichi Suzuki

IPC: C08G75/02 ,  C08G75/0204 ,  C08G75/0254 ,  C08G75/14

Abstract: The present invention is a production method for producing polyarylene sulfide, wherein an unreacted dihalo aromatic compound is recovered and reused. The present production method includes: (a) a polymerization step; (b) a separation step; and (c) a recovery step of recovering unreacted dihalo aromatic compound from a water-containing mixture of the separated liquid by steam distillation entailing adjusting the reflux ratio of water in the steam distillation column without adding water other than the refluxed water. Alternatively, the production method includes: (a) a polymerization step; (d) a dehydration step; and (c) a recovery step of recovering unreacted dihalo aromatic compound from a water-containing mixture of a water-containing liquid mixture and/or a water-containing steam mixture containing a raw material mixture and/or a polymerization reaction solution by steam distillation entailing adjusting the reflux ratio of water in the steam distillation column without adding water other than the refluxed water in the dehydration step.

公开(公告)号：US20190013547A1

公开(公告)日：2019-01-10

申请号：US16067849

申请日：2017-02-08

Applicant: Kureha Corporation

Inventor： Keisuke WATANABE

IPC: H01M10/0565 ,  H01M10/0569 ,  C08F214/22 ,  C08J3/11 ,  C08J3/09

Abstract: Provided is a gel electrolyte that has a lower concentration of matrix polymer and that can maintain a gel state. The gel electrolyte contains a non-aqueous electrolyte solution in which a lithium-containing electrolyte is dissolved in a non-aqueous solvent and a matrix polymer, the matrix polymer being a copolymer containing a vinylidene fluoride unit and a fluorine atom-containing monomer unit as a repeating unit, and the crystallization temperature Tc of the matrix polymer being within a range that satisfies the following Relationship (I) relative to the concentration C (mass %) of the matrix polymer included in the gel electrolyte: Tc≥110−C  (I), where 0.1≤C≤30.

公开(公告)号：US20180358626A1

公开(公告)日：2018-12-13

申请号：US16069197

申请日：2016-11-14

Applicant: Kureha Corporation

Inventor： Yoshiyuki NAGASAWA ,  Tamito IGARASHI

IPC: H01M4/62 ,  C08F214/22 ,  H01M4/133 ,  H01M10/0525

CPC classification number: H01M4/623 ,  C08F214/22 ,  C08F214/222 ,  C08F2800/20 ,  C08F2810/20 ,  C08L27/16 ,  H01M4/13 ,  H01M4/133 ,  H01M4/62 ,  H01M10/0525

Abstract: The present invention provides a binder composition which suppresses a swelling ratio in an electrolyte solution while having sufficient peel strength. The binder composition according to the present invention contains a copolymer including monomer units derived from vinylidene fluoride, a fluorine-containing alkyl vinyl compound, and a crosslinkable monomer; the content of the monomer unit derived from the fluorine-containing alkyl vinyl compound in the copolymer being not less than 2 mass % and less than 10 mass %; and the content of the monomer unit derived from the crosslinkable monomer being less than 5 mass %.

公开(公告)号：US20180323433A1

公开(公告)日：2018-11-08

申请号：US15770866

申请日：2016-10-27

Applicant: KURARAY CO., LTD. ,  KUREHA CORPORATION

Inventor： Tomohiro KAWAKAMI ,  Sayaka IDE ,  Takafumi IZAWA ,  Taketoshi OKUNO ,  Jun-Sang CHO ,  Hideharu IWASAKI

IPC: H01M4/587 ,  H01M10/0525 ,  C01B32/05

CPC classification number: H01M4/587 ,  C01B32/05 ,  C01P2002/76 ,  C01P2002/78 ,  C01P2004/61 ,  C01P2006/10 ,  C01P2006/12 ,  C01P2006/40 ,  C01P2006/80 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/027

Abstract: An object of the present invention is to provide a carbonaceous material (carbonaceous material for a non-aqueous electrolyte secondary battery) used for a negative electrode of a non-aqueous electrolyte secondary battery (e.g., a lithium ion secondary battery) exhibiting favorable charge/discharge capacities and low resistance and having favorable resistance to oxidative degradation. The present invention relates to a carbonaceous material for a non-aqueous electrolyte secondary battery, having an average interplanar spacing d002 of the (002) plane within a range of 0.36 to 0.42 nm calculated by using the Bragg equation according to a wide-angle X-ray diffraction method, a specific surface area within a range of 20 to 65 m2/g obtained by a nitrogen adsorption BET three-point method, a nitrogen element content of 0.3 mass % or less, an oxygen element content of 2.5 mass % or less, and an average particle diameter of 1 to 4 μm according to a laser scattering method.

公开(公告)号：US20180250921A1

公开(公告)日：2018-09-06

申请号：US15756105

申请日：2016-09-06

Applicant: Kureha Corporation

Inventor： ICHIRO KITADA ,  SHOTA NAMBU

IPC: B32B27/08 ,  B32B7/12 ,  B32B27/30 ,  B32B27/32 ,  B29C55/14 ,  B29C35/08 ,  B65D65/40

CPC classification number: B32B27/08 ,  B29C35/0805 ,  B29C51/14 ,  B29C55/005 ,  B29C55/143 ,  B29C55/28 ,  B29C2035/0838 ,  B29K2023/0616 ,  B29K2023/083 ,  B29K2027/08 ,  B29K2995/0053 ,  B29K2995/0067 ,  B29L2031/712 ,  B32B7/12 ,  B32B27/28 ,  B32B27/30 ,  B32B27/304 ,  B32B27/306 ,  B32B27/32 ,  B32B37/12 ,  B32B2250/04 ,  B32B2307/30 ,  B32B2307/518 ,  B32B2307/72 ,  B32B2307/7244 ,  B32B2307/732 ,  B32B2307/738 ,  B32B2307/748 ,  B32B2309/105 ,  B32B2435/02 ,  B32B2439/70 ,  B65D1/00 ,  B65D1/26 ,  B65D65/40

Abstract: To provide a multilayer film that enables easy opening of a packaging material manufactured by deep draw forming. A multilayer film for deep draw forming, including: a vinylidene chloride copolymer resin layer as a middle layer; a crosslinked olefin resin layer as a first surface layer; and an ethylene/vinyl acetate copolymer resin layer as a second surface layer; where the ethylene/vinyl acetate copolymer resin layer is further provided either at least between the vinylidene chloride copolymer resin layer as the middle layer and crosslinked olefin resin layer as the first surface layer, or between the vinylidene chloride copolymer resin layer as the middle layer and ethylene/vinyl acetate copolymer resin layer as the second surface layer.

公开(公告)号：US20180248193A1

公开(公告)日：2018-08-30

申请号：US15559100

申请日：2016-04-13

Applicant: Kureha Corporation

Inventor： YUKI SAKAI ,  EMI SUGAWARA

IPC: H01M4/62 ,  H01M4/04 ,  H01M4/66 ,  H01M10/0525 ,  C08F214/22 ,  C09D127/16 ,  C09D5/24 ,  H01M4/36

Abstract: In an electrode structural body, a coated film is obtained by applying an electrode mixture including an electrode active material, a first fluorine based polymer, and a solvent and drying the mixture, then formed on the surface of a current collector, the first fluorine based polymer has one or more side chains represented by the following Formula (1), and the coated film is subjected to heat treatment. —X—COOH   (1) (In Formula (1), X is an atomic group having a molecular weight of less than 500, the main chain of which is made up of 1 to 20 atoms.)

公开(公告)号：US09947927B2

公开(公告)日：2018-04-17

申请号：US15300356

申请日：2015-03-31

Applicant: Kureha Corporation

Inventor： Kenta Aoki ,  Shota Kobayashi ,  Tatsuya Yaguchi ,  Hiroshi Imoto ,  Yasuhiro Tada ,  Naohiro Sonobe

IPC: H01M4/587 ,  H01M4/133 ,  H01M4/1393 ,  H01M10/0562 ,  H01M4/04 ,  H01M4/36 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/052 ,  H01M4/02

CPC classification number: H01M4/587 ,  H01M4/043 ,  H01M4/133 ,  H01M4/1393 ,  H01M4/366 ,  H01M4/62 ,  H01M10/052 ,  H01M10/0525 ,  H01M10/0562 ,  H01M2004/027 ,  H01M2220/20 ,  H01M2300/0068

Abstract: An object of the present invention is to provide a production method for suppressing the deformation of a negative electrode in the production of a negative electrode for an all-solid-state battery using turbostratic carbon and a solid electrolyte.The problem described above can be solved by a production method for a negative electrode for an all-solid-state battery comprising the steps of: (1) coating a carbonaceous material having a true density of from 1.30 g/cm3 to 2.10 g/cm3 determined by a butanol method with a solid electrolyte; and (2) pressure-molding the solid electrolyte-coated carbonaceous material.