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：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：US09458316B2

公开(公告)日：2016-10-04

申请号：US14338802

申请日：2014-07-23

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Taku Yamanaka ,  Masayoshi Miyamoto ,  Shunji Kasai ,  Masayuki Tsuji ,  Kazuya Kawahara ,  Mayumi Yamauchi ,  Taketo Kato ,  Yasuhiko Sawada

IPC: C08L27/18 ,  C08L69/00 ,  C08F214/26 ,  C08L67/02 ,  C08J3/16 ,  C08J3/20 ,  C08L27/22

CPC classification number: C08L69/00 ,  C08F214/26 ,  C08J3/16 ,  C08J3/203 ,  C08J2327/18 ,  C08J2369/00 ,  C08J2427/18 ,  C08L27/18 ,  C08L27/22 ,  C08L67/02 ,  Y10T428/2982 ,  C08F214/28 ,  C08F2/26

Abstract: Provided is a dripping inhibitor excellent in handling characteristics. The present invention provides a dripping inhibitor including a modified polytetrafluoroethylene, the inhibitor having an average particle size of 300 to 800 μm, an apparent density of 0.40 to 0.52 g/ml, a compression ratio of 1.20 or less, an aggregate disintegration degree with 50-sec vibration of 70% or more, a cylinder extrusion pressure at a reduction ratio 1500 of 80 MPa or less, and a standard specific gravity (SSG) of 2.140 to 2.230.

公开(公告)号：US20240150533A1

公开(公告)日：2024-05-09

申请号：US18400039

申请日：2023-12-29

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Takayuki TANAKA ,  Masayoshi Miyamoto ,  Tomoki Minamiyama ,  Takeki Kusunoki ,  Tokahiro Taira ,  Takuya Yamabe ,  Hirotoshi Yoshida ,  Taketo Kato ,  Taku Yamanaka ,  Mitsuo Tsukamoto

IPC: B29C71/02 ,  C08F114/26

CPC classification number: C08J7/08 ,  C08F114/26 ,  C08J2327/18

Abstract: A method for producing a polytetrafluoroethylene particle, which includes subjecting tetrafluoroethylene to suspension polymerization in an aqueous medium to prepare a suspension-polymerized particle of polytetrafluoroethylene, washing and then crushing the suspension-polymerized particle or crushing the suspension-polymerized particle with washing to prepare a crushed particle, dehydrating the crushed particle to prepare a crushed particle having a water content of 40% by mass or less, and subjecting the dehydrated crushed particle to heat treatment to produce a polytetrafluoroethylene particle.

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：US11518826B2

公开(公告)日：2022-12-06

申请号：US16957288

申请日：2018-12-25

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Kazuhiro Mishima ,  Takahiro Taira ,  Chiaki Okui ,  Takayuki Tanaka ,  Masayoshi Miyamoto ,  Taku Yamanaka

IPC: C08F2/46 ,  C08F2/50 ,  C08G61/04 ,  C08F14/26 ,  C08J3/16 ,  C08J3/28

Abstract: A method for producing a polytetrafluoroethylene powder, which includes applying an ultrasonic wave to a polytetrafluoroethylene aqueous dispersion containing polytetrafluoroethylene particles to coagulate the polytetrafluoroethylene particles.

公开(公告)号：US20240150505A1

公开(公告)日：2024-05-09

申请号：US18397595

申请日：2023-12-27

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Takahiro TAIRA ,  Kazuhiro Mishima ,  Takayuki Tanaka ,  Takeki Kusunoki ,  Masayoshi Miyamoto ,  Tomoki Minamiyama ,  Mitsuo Tsukamoto ,  Kenji Ichikawa ,  Takuya Yamabe ,  Hirotoshi Yoshida ,  Taketo Kato ,  Taku Yamanaka

IPC: C08F214/26 ,  B29C43/00 ,  C08F2/18 ,  C08F6/24 ,  C08F8/22

CPC classification number: C08F214/262 ,  B29C43/003 ,  B29C43/006 ,  C08F2/18 ,  C08F6/24 ,  C08F8/22 ,  B29K2027/18

Abstract: A method for producing a polytetrafluoroethylene powder, which includes subjecting tetrafluoroethylene to suspension polymerization in an aqueous medium to prepare a suspension-polymerized particle of non melt-processible polytetrafluoroethylene, drying the suspension-polymerized particle to prepare a dry particle, subjecting the dry particle to fluorine radical treatment to prepare a fluorine radical-treated particle, and crushing the fluorine radical-treated particle to produce a polytetrafluoroethylene powder. Also disclosed is a polytetrafluoroethylene formed article obtained by forming the polytetrafluoroethylene powder, as well as a polytetrafluoroethylene compression-molded article obtained by compression molding the polytetrafluoroethylene powder.