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：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.

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.

公开(公告)号：US10538605B2

公开(公告)日：2020-01-21

申请号：US16069052

申请日：2017-08-04

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

Abstract: A method for producing low molecular weight polytetrafluoroethylene less likely to generate C8-C14 perfluorocarboxylic acids and salts thereof. The method includes: (1) feeding into an airtight container: polytetrafluoroethylene; at least one additive selected from the group consisting of hydrocarbons, chlorinated hydrocarbons, alcohols, and carboxylic acids other than C8-C14 perfluorocarboxylic acids; and at least one selected from the group consisting of inert gases other than the above additive and oxygen adsorbents; and (2) irradiating the polytetrafluoroethylene to provide low molecular weight polytetrafluoroethylene having a complex viscosity of 1×102 to 7×105 Pa·s at 380° C.

公开(公告)号：US09707504B2

公开(公告)日：2017-07-18

申请号：US14394946

申请日：2013-04-19

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Shinichi Chaen ,  Hideyuki Kiyotani ,  Kunihiko Inui ,  Taku Yamanaka ,  Li Bao ,  Yoshiyuki Shibuya ,  Seigo Yamamoto ,  Makoto Kobayashi ,  Shunji Kasai ,  Hitoshi Niinuma

IPC: B01D53/22 ,  B01D46/54 ,  B32B27/32 ,  C08L27/18 ,  B01D46/00 ,  B29D7/01 ,  B29D99/00 ,  B01D71/36 ,  B29K27/18 ,  B29K105/00

CPC classification number: B01D71/36 ,  B01D46/0001 ,  B01D46/0019 ,  B01D46/543 ,  B29D7/01 ,  B29D99/005 ,  B29K2027/18 ,  B29K2105/0005 ,  B32B27/322 ,  C08K3/36 ,  C08L27/18 ,  C08L83/04 ,  C08L2205/025 ,  C08L2205/03

Abstract: A composition, a mixed powder and a material for molding have polytetrafluoroethylene as a main component. Each includes polytetrafluoroethylene that can be fibrillated, a non-hot melt processable component that is not fibrillated, and a hot melt processable component with a melting point of lower than 320° C. that is not fibrillated. The hot melt processable component is contained at equal to or more than 0.1% by weight but less than 20% by weight of a total weight. A filtering medium for an air filter includes a porous membrane made of these components, and an air permeable support. The porous membrane is manufactured, by mixing these components, extruding the mixture, rolling and drawing.

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：US20250059304A1

公开(公告)日：2025-02-20

申请号：US18926389

申请日：2024-10-25

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Masanori KITAICHI ,  Tatsuya Morikawa ,  Takuma Iwasaka ,  Yuto Kurasaki ,  Eisaku Sumino ,  Ryo Takishima ,  Tomohito Inoue ,  Taketo Kato ,  Kenji Ichikawa ,  Kengo Ito ,  Chiaki Okui ,  Masaki Irie ,  Taku Yamanaka

IPC: C08F2/26 ,  C08F6/22 ,  C08F14/26

Abstract: There is provided a method for producing a fluoropolymer, the method including polymerizing a fluoromonomer in an aqueous medium to obtain a polymerization dispersion containing the fluoropolymer, and bringing the fluoropolymer in the polymerization dispersion into contact with an alcohol having 3 to 5 carbon atoms to coagulate the fluoropolymer to thereby obtain the fluoropolymer.

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.