公开(公告)号：US20210115224A1

公开(公告)日：2021-04-22

申请号：US16498849

申请日：2018-03-30

申请人： DAIKIN INDUSTRIES, LTD.

发明人： Taketo KATO ,  Satoru YONEDA ,  Manabu FUJISAWA ,  Kazuya ASANO ,  Takahiro KITAHARA ,  Masahiro HIGASHI ,  Akiyoshi YAMAUCHI ,  Sumi ISHIHARA ,  Yosuke KISHIKAWA ,  Shinnosuke NITTA ,  Marina NAKANO ,  Hirotoshi YOSHIDA ,  Yoshinori NAN BA ,  Kengo ITO ,  Chiaki OKUI ,  Hirokazu AOYAMA ,  Masamichi SUKEGAWA ,  Taku YAMANAKA ,  Hiroyuki SATO ,  Yuuji TANAKA ,  Kenji ICHIKAWA ,  Yohei FUJIMOTO

IPC分类号： C08K5/41 ,  C08F14/26 ,  C08K5/098

摘要： A method for producing a fluoropolymer which includes polymerizing a fluoromonomer in an aqueous medium in the presence of a surfactant to provide a fluoropolymer. The surfactant includes at least one selected from the group consisting of a surfactant represented by R1a—CO—R2 a—CO—R3a—OSO3Xa and a surfactant represented by R1b—CO—(CR2b2)n—(OR3b)p—(CR4b2)q-L-OSO3Xb.

公开(公告)号：US20200067052A1

公开(公告)日：2020-02-27

申请号：US16610591

申请日：2018-03-27

申请人： DAIKIN INDUSTRIES, LTD.

发明人： Takahiro KITAHARA ,  Manabu FUJISAWA ,  Takashi IGUCHI ,  Kazuya ASANO ,  Chihiro SHINODA

IPC分类号： H01M2/16 ,  H01M10/0525 ,  C08F214/22 ,  H01M10/058 ,  C08F214/26

摘要： A secondary battery separator including a porous substrate and a porous film firmly bonded to each other, the porous film being disposed on or above the porous substrate. The porous film contains a fluorine-containing polymer that contains a polymerized unit based on vinylidene fluoride, a polymerized unit based on tetrafluoroethylene, and a polymerized unit based on a monomer represented by the following formula (2-2): R5R6C═CR7R8CO2Y1  (2-2) wherein R5, R6, and R7 are each independently a hydrogen atom or a C1-C8 hydrocarbon group; R8 is a C1-C8 hydrocarbon group; and Y1 is an inorganic cation and/or an organic cation. Also disclosed is a secondary battery including the secondary battery separator; a positive electrode; a negative electrode; and a non-aqueous electrolyte solution.