公开(公告)号：US20240287263A1

公开(公告)日：2024-08-29

申请号：US18617988

申请日：2024-03-27

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Taketo KATO ,  Kohei Yasuda ,  Taku Yamanaka ,  Masayoshi Miyamoto ,  Kenta Murayama ,  Ryota Usami ,  Hirotoshi Yoshida ,  Hiroyuki Sato ,  Emi Yamamoto ,  Kenta Nishimura ,  Nobuki Uraoka

IPC: C08J3/12 ,  C08F114/26

CPC classification number: C08J3/12 ,  C08F114/26 ,  C08J2327/18

Abstract: The disclosure aims to provide a polytetrafluoroethylene fine powder containing less water and less impurities. Provided is a polytetrafluoroethylene fine powder substantially free from water and a fluorine-containing compound having a molecular weight of 1000 or less.

公开(公告)号：US11189399B2

公开(公告)日：2021-11-30

申请号：US15121150

申请日：2015-02-27

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Hiroyuki Yoshimoto ,  Kohei Yasuda ,  Kazuya Kawahara ,  Haruhisa Masuda ,  Masayuki Tsuji

IPC: C08J3/05 ,  H01B13/14 ,  H01B3/44 ,  C08J3/11 ,  C08F14/26 ,  C09D127/18 ,  H01B7/02

Abstract: The present invention aims to provide a paste containing polytetrafluoroethylene which can be formed into a molded polytetrafluoroethylene article having a significantly small thickness of polytetrafluoroethylene and is less likely to cause defects in molding; and a method of producing the paste. The present invention provides a method of producing a paste, including the steps of coagulating primary particles of polytetrafluoroethylene in an aqueous dispersion that contains the primary particles and water to form slurry that contains secondary particles of polytetrafluoroethylene and water or secondary particles of polytetrafluoroethylene floating in water; and adding an organic solvent to at least one of the slurry and the secondary particles of polytetrafluoroethylene floating in water to provide the paste.

公开(公告)号：US11084895B2

公开(公告)日：2021-08-10

申请号：US15038307

申请日：2014-12-01

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Taku Yamanaka ,  Makoto Ono ,  Kohei Yasuda ,  Masahiko Yamada ,  Shinichi Chaen ,  Yasuhiko Sawada ,  Takahiro Taira ,  Hirotoshi Yoshida ,  Taketo Kato

IPC: C08F214/18 ,  C08J5/18 ,  C08F214/26 ,  B29C55/04

Abstract: The present invention aims to provide a modified polytetrafluoroethylene fine powder capable of providing a stretched body having high strength, a small pore size, and excellent homogeneity. The modified polytetrafluoroethylene fine powder of the present invention has non-melt-processability, has a standard specific gravity of 2.155 or lower, includes 0.015 mol % or more of a polymer unit derived from perfluoro(methyl vinyl ether) in all the monomer units, is obtained by emulsion polymerizing tetrafluoroethylene and at least the perfluoro(methyl vinyl ether) in the presence of a fluorosurfactant having a LogPOW value of 3.4 or lower, and has an extrusion pressure of 20.0 MPa or lower.

公开(公告)号：US20240243293A1

公开(公告)日：2024-07-18

申请号：US18617779

申请日：2024-03-27

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Taketo KATO ,  Takaya Yamada ,  Kohei Yasuda ,  Taku Yamanaka ,  Junpei Terada ,  Masayoshi Miyamoto ,  Kenta Murayama ,  Ryota Usami ,  Hirotoshi Yoshida

IPC: H01M4/62

CPC classification number: H01M4/623

Abstract: The disclosure aims to provide a polytetrafluoroethylene powder for an electrode binder which is a sustainable product and can reduce or prevent gas generation inside a battery cell and deterioration of battery characteristics, an electrode binder, an electrode mixture, an electrode, and a secondary battery. Provided is a polytetrafluoroethylene powder for use as an electrode binder, the polytetrafluoroethylene powder being substantially free from water and a fluorine-containing compound having a molecular weight of 1000 or less.

公开(公告)号：US10688448B2

公开(公告)日：2020-06-23

申请号：US15100002

申请日：2014-12-01

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Shinichi Chaen ,  Taku Yamanaka ,  Kohei Yasuda ,  Masahiko Yamada ,  Nobuki Uraoka ,  Tomohisa Konishi ,  Kunihiko Inui ,  Yoshiyuki Shibuya ,  Makoto Ono

IPC: B01D71/36 ,  B01D69/02 ,  H01M8/1039 ,  B01D69/08 ,  C08J5/22 ,  B01J20/26 ,  B01D39/16 ,  H01M8/1018

Abstract: The present invention provides a porous body having high strength, a small pore size, and excellent homogeneity. The porous body of the present invention includes polytetrafluoroethylene and has a microstructure that includes nodes and fibrils. The microstructure further includes, in addition to the nodes and the fibrils, fused points where a fibril that links two nodes and another fibril that links another two nodes are fused with each other.