公开(公告)号：US20200235400A1

公开(公告)日：2020-07-23

申请号：US16305449

申请日：2017-05-18

Applicant: Kureha Corporation

Inventor： Yuki SAKAI ,  Shintarou KAMATA ,  Emi SUGAWARA

IPC: H01M4/62 ,  H01M4/66 ,  H01M10/0565 ,  C08L27/16 ,  C08F214/22 ,  C09J7/38

Abstract: Provided is a binder composition that exhibits sufficient adhesion and that achieves the excellent dispersibility of a conductive auxiliary agent. The binder composition according to an embodiment of the present invention is a binder composition containing a vinylidene fluoride copolymer composition containing vinylidene fluoride and an acrylic monomer; the acrylic monomer being at least one type selected from acrylic acid and methacrylic acid; and a ratio (Mn2/Mn1) of a number average molecular weight of the vinylidene fluoride copolymer composition after being adsorbed onto alumina (Mn2) to a number average molecular weight of the vinylidene fluoride copolymer composition before being adsorbed onto alumina (Mn1) being less than 2.

公开(公告)号：US20200235401A1

公开(公告)日：2020-07-23

申请号：US16306175

申请日：2017-05-18

Applicant: Kureha Corporation

Inventor： Yuki SAKAI ,  Shintarou KAMATA ,  Emi SUGAWARA

IPC: H01M4/62 ,  H01M4/36 ,  C08F214/22 ,  C08K3/04

Abstract: A binder composition that exhibits sufficient adhesion and that achieves the excellent dispersibility of a conductive additive is provided. The binder composition according to an embodiment of the present invention is a binder composition including a vinylidene fluoride copolymer composition containing vinylidene fluoride and a monomer having an acidic functional group; and a ratio (Mn2/Mn1) of a number average molecular weight of the vinylidene fluoride copolymer composition after being adsorbed onto alumina (Mn2) to a number average molecular weight of the vinylidene fluoride copolymer composition before being adsorbed onto alumina (Mn1) being less than 1.

公开(公告)号：US20250118758A1

公开(公告)日：2025-04-10

申请号：US18723177

申请日：2022-12-06

Applicant: Kureha Corporation

Inventor： Yukihiro TAKAHASHI ,  Takuya YAMANE ,  Yuki SAKAI ,  Mayumi SUGAHARA

IPC: H01M4/62 ,  H01M10/052 ,  H01M10/0567 ,  H01M10/0569

Abstract: An object is to provide a binder for a non-aqueous electrolyte secondary battery that undergoes less deterioration or less viscosity increase in a case where the binder is mixed with an active material containing a large amount of base or the like and that is stable for a long period of time. The binder for a non-aqueous electrolyte secondary battery that solves the issue described above includes a vinylidene fluoride polymer, the vinylidene fluoride polymer containing a structural unit derived from vinylidene fluoride and a structural unit derived from a compound represented by a specific structural formula and having a melting point of 165° C. or higher.

公开(公告)号：US20170306174A1

公开(公告)日：2017-10-26

申请号：US15643153

申请日：2017-07-06

Applicant: KUREHA CORPORATION

Inventor： Yusaku INABA ,  Tamito IGARASHI ,  Yuki SAKAI ,  Aya TAKEUCHI

IPC: C09D127/16 ,  C08K3/22 ,  C09D7/12 ,  H01M2/14 ,  H01M2/16 ,  H01M10/052

CPC classification number: C09D127/16 ,  C08K3/22 ,  C08K2003/2227 ,  C09D7/61 ,  H01M2/145 ,  H01M2/1646 ,  H01M2/1653 ,  H01M2/166 ,  H01M2/1673 ,  H01M2/1686 ,  H01M10/052 ,  H01M2220/20 ,  Y02E60/122 ,  Y02P70/54 ,  C08K3/00 ,  C08L27/16

Abstract: An object of the present invention is to provide a filler-containing resin film in which shedding of inorganic materials or the like is suppressed, a resin composition that can be used in production of the filler-containing resin film, and a method for producing the filler-containing resin film. The filler-containing resin film of the present invention is a filler-containing resin film comprising: a vinylidene fluoride copolymer obtained by copolymerizing vinylidene fluoride and a compound represented by formula (1) (in formula (1), R1, R2, and R3 are each independently hydrogen atoms, chlorine atoms, or alkyl groups having from 1 to 5 carbons; and X′ is an atomic group having a molecular weight of 472 or less and having a main chain configured from 1 to 19 atoms); and an insulating inorganic filler. The resin film is produced by applying onto a substrate and then drying a resin composition containing the vinylidene fluoride copolymer, the insulating inorganic filler, and an organic solvent.