公开(公告)号：US11952441B2

公开(公告)日：2024-04-09

申请号：US17280940

申请日：2019-10-03

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Taketo Kato ,  Yohei Fujimoto ,  Kenji Ichikawa ,  Hiroyuki Sato ,  Yoshinori Nanba ,  Hirotoshi Yoshida ,  Kengo Ito ,  Chiaki Okui ,  Masamichi Sukegawa ,  Taku Yamanaka

IPC: C08F114/26 ,  C08L27/18

CPC classification number: C08F114/26 ,  C08L27/18

Abstract: A method for producing polytetrafluoroethylene, which includes polymerizing tetrafluoroethylene in an aqueous medium in the presence of a nucleating agent and a hydrocarbon anionic surfactant to obtain polytetrafluoroethylene. A total amount of the nucleating agent and the hydrocarbon anionic surfactant at the initiation of polymerization is more than 50 ppm based on the aqueous medium.

公开(公告)号：US11851519B2

公开(公告)日：2023-12-26

申请号：US16637601

申请日：2018-08-10

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Takahiro Taira ,  Kazuhiro Mishima ,  Chiaki Okui ,  Tadao Hayashi ,  Hirotoshi Yoshida ,  Yuuji Tanaka ,  Masayoshi Miyamoto ,  Taku Yamanaka ,  Taketo Kato

IPC: C08F6/06 ,  C08F6/16 ,  C08F6/24

CPC classification number: C08F6/06 ,  C08F6/16 ,  C08F6/24

Abstract: A method for producing an aqueous dispersion of purified polytetrafluoroethylene, the method including: removing or reducing a compound represented by Formula (1) or (2) below from an aqueous dispersion of polytetrafluoroethylene obtained using a hydrocarbon surfactant:

(H—(CF2)m—COO)pM1; or  Formula (1):

(H—(CF2)n—SO3)qM2.  Formula (2):

Also disclosed is a composition containing polytetrafluoroethylene substantially free from a compound represented by Formula (3) below and a molded body including the composition:

(H—(CF2)8—SO3)qM2.  Formula (3):

公开(公告)号：US11279814B2

公开(公告)日：2022-03-22

申请号：US16498849

申请日：2018-03-30

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： 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 Nanba ,  Kengo Ito ,  Chiaki Okui ,  Hirokazu Aoyama ,  Masamichi Sukegawa ,  Taku Yamanaka ,  Hiroyuki Sato ,  Yuuji Tanaka ,  Kenji Ichikawa ,  Yohei Fujimoto

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

Abstract: 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—R2a—CO—R3a—OSO3Xa and a surfactant represented by R1b—CO—(CR2b2)n—(OR3b)p—(CR4b2)q-L-OSO3Xb.

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：US12012470B2

公开(公告)日：2024-06-18

申请号：US17974402

申请日：2022-10-26

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： 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 Nanba ,  Kengo Ito ,  Chiaki Okui ,  Hirokazu Aoyama ,  Masamichi Sukegawa ,  Taku Yamanaka ,  Yuuji Tanaka ,  Kenji Ichikawa ,  Yohei Fujimoto ,  Hiroyuki Sato

IPC: C08F14/26 ,  C08K5/098 ,  C08K5/42

CPC classification number: C08F14/26 ,  C08K5/098 ,  C08K5/42 ,  C08K2201/014 ,  C08K2201/019

Abstract: A composition including a fluoropolymer and substantially free from a compound represented by the following formula (3): (H—(CF2)8—SO3)qM2, wherein M2 is H, a metal atom, NR54, imidazolium optionally containing a substituent, pyridinium optionally containing a substituent, or phosphonium optionally containing a substituent; R5s are each H or an organic group and are the same as or different from each other; and q is 1 or 2.

公开(公告)号：US12006407B2

公开(公告)日：2024-06-11

申请号：US18103443

申请日：2023-01-30

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Ken Yoshida ,  Hirotoshi Yoshida ,  Keisuke Hagi ,  Masayuki Tsuji ,  Taketo Kato ,  Yuuji Tanaka ,  Taku Yamanaka ,  Kazuya Kawahara ,  Masamichi Sukegawa ,  Kazutaka Hosokawa

IPC: C08J3/12 ,  C08F8/06 ,  C08F8/50 ,  C08F14/26 ,  C08J3/28

CPC classification number: C08J3/12 ,  C08F8/06 ,  C08F8/50 ,  C08F14/26 ,  C08J3/28 ,  C08F2500/07 ,  C08F2500/17 ,  C08F2800/20 ,  C08F2810/40 ,  C08J2327/18 ,  C08J2327/22 ,  C08F8/50 ,  C08F8/06 ,  C08F114/26 ,  C08F8/50 ,  C08F8/06 ,  C08F214/26

Abstract: Powder including low molecular weight polytetrafluoroethylene having a melt viscosity of 1×102 to 7×105 Pa·s at 380° C., having a melt viscosity of 1×102 to 7×105 Pa·s at 380° C., having an average particle size of 1.0 to 50 μm, and containing 30 or more carboxyl groups at ends of the molecule chain per 106 carbon atoms in the main chain, wherein the powder is substantially free from C8-C14 perfluorocarboxylic acids and salts thereof.

公开(公告)号：US11767379B2

公开(公告)日：2023-09-26

申请号：US16976945

申请日：2019-03-01

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Yoshinori Nanba ,  Kenji Ichikawa ,  Yohei Fujimoto ,  Hirotoshi Yoshida ,  Hiroyuki Sato ,  Taketo Kato ,  Kengo Ito ,  Sumi Ishihara ,  Masahiro Higashi ,  Satoru Yoneda ,  Hirokazu Aoyama ,  Masamichi Sukegawa ,  Yosuke Kishikawa ,  Takahiro Taira ,  Chiaki Okui ,  Taku Yamanaka

IPC: C08F14/26 ,  B29C55/00 ,  C08F2/22 ,  C08F2/44 ,  C08F261/06 ,  C08F114/26 ,  C08F214/26 ,  B29K27/18

CPC classification number: C08F14/26 ,  B29C55/005 ,  C08F2/22 ,  C08F2/44 ,  C08F114/26 ,  C08F214/26 ,  C08F261/06 ,  B29K2027/18

Abstract: A method for producing a fluoropolymer, which includes polymerizing a fluoromonomer in an aqueous medium in the presence of a polymer (1), the polymer (1) including a polymerized unit derived from a monomer CX2═CY(—CZ2—O—Rf-A), wherein X is the same or different and is —H or —F; Y is —H, —F, an alkyl group, or a fluorine-containing alkyl group; Z is the same or different and is —H, —F, an alkyl group, or a fluoroalkyl group; Rf is a C1-C40 fluorine-containing alkylene group or a C—C100 fluorine-containing alkylene group and having an ether bond; and A is —COOM, —SO3M, or —OSO3M, wherein M is —H, a metal atom, —NR74, imidazolium optionally having a substituent, pyridinium optionally having a substituent, or phosphonium optionally having a substituent, wherein R7 is H or an organic group, providing that at least one of X, Y, and Z contains a fluorine atom.

公开(公告)号：US11512155B2

公开(公告)日：2022-11-29

申请号：US16499047

申请日：2018-03-30

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： 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 Nanba ,  Kengo Ito ,  Chiaki Okui ,  Hirokazu Aoyama ,  Masamichi Sukegawa ,  Taku Yamanaka ,  Yuuji Tanaka ,  Kenji Ichikawa ,  Yohei Fujimoto ,  Hiroyuki Sato

IPC: C08F14/26 ,  C08K5/098 ,  C08K5/42

Abstract: A method for producing a fluoropolymer of the invention 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—R2a—CO—R3a-Aa and a surfactant represented by R1b—CO—(CR2b2)n—(OR3b)p—(CR4b2)q-L-Ab.

公开(公告)号：US10793650B2

公开(公告)日：2020-10-06

申请号：US16696970

申请日：2019-11-26

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Ken Yoshida ,  Hirotoshi Yoshida ,  Keisuke Hagi ,  Masayuki Tsuji ,  Taketo Kato ,  Yuuji Tanaka ,  Taku Yamanaka ,  Kazuya Kawahara ,  Masamichi Sukegawa ,  Kazutaka Hosokawa

IPC: C08F2/46 ,  C08F2/50 ,  C08G61/04 ,  C08F8/50 ,  C08J3/28 ,  C08K5/01 ,  C08K5/03

Abstract: Low molecular weight polytetrafluoroethylene powder having a complex viscosity of 1×102 to 7×105 Pa·s at 380° C., containing 5 or less carboxyl groups at ends of the molecule chain per 106 carbon atoms in the main chain, and being substantially free from C8-C14 perfluorocarboxylic acids and salts thereof. Also disclosed is a method for producing low molecular weight polytetrafluoroethylene.

公开(公告)号：US20200123283A1

公开(公告)日：2020-04-23

申请号：US16696970

申请日：2019-11-26

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Ken YOSHIDA ,  Hirotoshi Yoshida ,  Keisuke Hagi ,  Masayuki Tsuji ,  Taketo Kato ,  Yuuji Tanaka ,  Taku Yamanaka ,  Kazuya Kawahara ,  Masamichi Sukegawa ,  Kazutaka Hosokawa

IPC: C08F8/50 ,  C08J3/28 ,  C08K5/03 ,  C08K5/01

Abstract: Low molecular weight polytetrafluoroethylene powder having a complex viscosity of 1×102 to 7×103 Pa·s at 380° C., containing 5 or less carboxyl groups at ends of the molecule chain per 106 carbon atoms in the main chain, and being substantially free from C8-C14 perfluorocarboxylic acids and salts thereof. Also disclosed is a method for producing low molecular weight polytetrafluoroethylene.