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公开(公告)号：US09976022B2
公开(公告)日：2018-05-22
申请号：US15316031
申请日：2015-06-04
Applicant: DAIKIN INDUSTRIES, LTD.
Inventor： Yoshinori Nanba , Dai Fukami , Takuya Yamabe , Taketo Kato , Makoto Ono , Takahiro Taira , Hirotoshi Yoshida , Taku Yamanaka
IPC: C08L27/18 , C08F114/26
Abstract: The present invention provides a polytetrafluoroethylene aqueous dispersion containing high-molecular-weight, significantly small polytetrafluoroethylene particles and having excellent dispersion stability. The present invention relates to an aqueous dispersion containing polytetrafluoroethylene particles containing a tetrafluoroethylene unit alone or a tetrafluoroethylene unit and a modifying monomer unit based on a modifying monomer copolymerizable with the tetrafluoroethylene. The polytetrafluoroethylene particles have a volume average particle size of not smaller than 0.1 nm but smaller than 20 nm, a melt flow rate of not lower than 0 g/10 min but lower than 80 g/10 min determined at 380° C. and 5 kg load, a melting point of 324° C. to 360° C., and an initial pyrolysis temperature of not lower than 400° C.
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公开(公告)号：US12030790B2
公开(公告)日：2024-07-09
申请号：US17280972
申请日：2019-10-03
Applicant: DAIKIN INDUSTRIES, LTD.
Inventor： Takahiro Taira , Tadao Hayashi , Chiaki Okui , Ryou Hatayama , Michinobu Koizumi , Taketo Kato , Yuuji Tanaka , Hirotoshi Yoshida
IPC: B01J41/04 , B01J20/20 , B01J20/28 , B01J41/12 , C02F1/28 , C02F1/42 , C02F101/36 , C02F103/38 , C08F14/26
CPC classification number: C02F1/283 , B01J20/20 , B01J20/28064 , B01J20/2808 , B01J20/28083 , B01J20/28085 , B01J41/04 , B01J41/12 , C02F1/42 , C08F14/26 , C02F2001/422 , C02F2101/36 , C02F2103/38
Abstract: A method for removing a fluorine-containing compound from discharge water, which includes bringing discharge water containing two or more fluorine-containing compounds represented by the following general formula (1) or (2) into contact with an adsorbent so as to adsorb the two or more fluorine-containing compounds:
(H—(CF2)m—COO)pM1 General Formula (1):
wherein m is 3 to 19, M1 is H, a metal atom, NRb4, where Rb is the same or different and is H or an organic group having 1 to 10 carbon atoms, imidazolium optionally having a substituent, pyridinium optionally having a substituent, or phosphonium optionally having a substituent; and p is 1 or 2;
(H—(CF2)n—SO3)qM2 General Formula (2):
wherein n is 4 to 20; M2 is H, a metal atom, NRb4, where Rb is the same as above, imidazolium optionally having a substituent, pyridinium optionally having a substituent, or phosphonium optionally having a substituent; and q is 1 or 2.-
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.
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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.
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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
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):-
Patent Agency Ranking
26.发明授权公开(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
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.
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27.发明申请公开(公告)号：US20250163196A1
公开(公告)日：2025-05-22
申请号：US19036386
申请日：2025-01-24
Applicant: DAIKIN INDUSTRIES, LTD.
Inventor： Hirotoshi YOSHIDA , Takuya Yamabe , Ranna Yamazaki , Masayuki Tsuji , Chisato Iguchi , Masaki Kubouchi , Eiji Masuda , Emi Yamamoto , Taketo Kato , Kazuya Kawahara , Yasukazu Nakatani , Taku Yamanaka
Abstract: Provided is a powder containing particles of low molecular weight polytetrafluoroethylene, wherein the powder contains a fluorine-containing compound having a hydrophilic group, and the content of the fluorine-containing compound having a hydrophilic group is 250 ppb by mass or less based on the powder, and wherein the powder has a specific surface area of 7 to 50 m2/g.
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公开(公告)号：US20250092242A1
公开(公告)日：2025-03-20
申请号：US18968356
申请日：2024-12-04
Applicant: DAIKIN INDUSTRIES, LTD.
Inventor： Yoshinori NANBA , Kenji Ichikawa , Yohei Fujimoto , Hirotoshi Yoshida , Hiroyuki Sato , Taketo Kato , Kengo Ito , Taku Yamanaka
Abstract: A composition including a polytetrafluoroethylene and a polymer (I) containing a polymerization unit (I) based on a monomer represented by the following general formula (I), the composition having a standard specific gravity of 2.200 or less: CX1X3=CX2R(—CZ1Z2-A0)m (I) wherein X1 and X3 are each independently F, Cl, H, or CF3; A0 is an anionic group; X2 is H, F, an alkyl group, or a fluorine-containing alkyl group; R is a linking group; Z1 and Z2 are each independently H, F, an alkyl group, or a fluorine-containing alkyl group; and m is an integer of 1 or more.
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公开(公告)号：US12195617B2
公开(公告)日：2025-01-14
申请号：US17294871
申请日：2019-11-19
Applicant: DAIKIN INDUSTRIES, LTD.
Inventor： Yoshinori Nanba , Kenji Ichikawa , Yohei Fujimoto , Hirotoshi Yoshida , Hiroyuki Sato , Taketo Kato , Kengo Ito , Taku Yamanaka
Abstract: A composition including a polytetrafluoroethylene and a polymer (I) containing a polymerization unit (I) based on a monomer represented by the following general formula (I), the composition having a standard specific gravity of 2.200 or less: CX1X3═CX2R(—CZ1Z2-A0)m (I) wherein X1 and X3 are each independently F, Cl, H, or CF3; A0 is an anionic group; X2 is H, F, an alkyl group, or a fluorine-containing alkyl group; R is a linking group; Z1 and Z2 are each independently H, F, an alkyl group, or a fluorine-containing alkyl group; and m is an integer of 1 or more.
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公开(公告)号：US20240294401A1
公开(公告)日：2024-09-05
申请号：US18648761
申请日：2024-04-29
Applicant: DAIKIN INDUSTRIES, LTD.
Inventor： Takahiro TAIRA , Tadao Hayashi , Chiaki Okui , Ryou Hatayama , Michinobu Koizumi , Taketo Kato , Yuuji Tanaka , Hirotoshi Yoshida
IPC: C02F1/28 , B01J20/20 , B01J20/28 , B01J41/04 , B01J41/12 , C02F1/42 , C02F101/36 , C02F103/38 , C08F14/26
CPC classification number: C02F1/283 , B01J20/20 , B01J20/28064 , B01J20/2808 , B01J20/28083 , B01J20/28085 , B01J41/04 , B01J41/12 , C02F1/42 , C08F14/26 , C02F2001/422 , C02F2101/36 , C02F2103/38
Abstract: A method for removing a fluorine-containing compound from discharge water, which includes bringing discharge water containing two or more fluorine-containing compounds represented by the following general formula (1) or (2) into contact with an adsorbent so as to adsorb the two or more fluorine-containing compounds:
(H—(CF2)m—COO)pM1 General Formula (1):
wherein m is 3 to 19, M1 is H, a metal atom, NRb4, where Rb is the same or different and is H or an organic group having 1 to 10 carbon atoms, imidazolium optionally having a substituent, pyridinium optionally having a substituent, or phosphonium optionally having a substituent; and p is 1 or 2;
(H—(CF2)n—SO3)qM2 General Formula (2):
wherein n is 4 to 20; M2 is H, a metal atom, NRb4, where Rb is the same as above, imidazolium optionally having a substituent, pyridinium optionally having a substituent, or phosphonium optionally having a substituent; and q is 1 or 2.
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