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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.
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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.-
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.
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Patent Agency Ranking
公开(公告)号：US11618806B2
公开(公告)日：2023-04-04
申请号：US16968033
申请日：2019-02-05
Applicant: DAIKIN INDUSTRIES, LTD.
Inventor： Masayuki Tsuji , Takayuki Nakamura , Hirotoshi Yoshida , Yuuji Tanaka
Abstract: A method for producing a composition containing low molecular weight polytetrafluoroethylene, the method including: (I) irradiating a composition containing high molecular weight polytetrafluoroethylene with ionizing radiation to obtain a composition containing low molecular weight polytetrafluoroethylene having a melt viscosity at 380° C. in the range of 1.0×102 to 7.0×105 Pa·s; and (II) carrying out at least one selected from the group consisting of washing treatment, steam treatment and decompression treatment on the composition containing low molecular weight polytetrafluoroethylene.
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公开(公告)号：US10858487B2
公开(公告)日：2020-12-08
申请号：US15757690
申请日：2016-08-30
Inventor： Kazuaki Ikeda , Hong-Phuc Nguyen , Hirotoshi Yoshida , Taku Yamanaka
IPC: C08F2/46 , C08F2/50 , C08G61/04 , C08J3/28 , C08J7/12 , B05D3/02 , B05D3/04 , C08J3/24 , B05D3/06 , B05D5/08 , C09D127/16 , B29C35/08 , C08F14/26 , C08J5/18 , B29K27/18
Abstract: A polytetrafluoroethylene formed product according to an aspect of the invention contains, as a principal component, a polytetrafluoroethylene having a crosslinked structure and has a PV limit of not less than 1600 MPa·m/min.
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公开(公告)号：US09902787B2
公开(公告)日：2018-02-27
申请号：US15316032
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
CPC classification number: C08F14/26 , C08F2/26 , C08F214/262 , C10M147/00 , C10M2213/0626
Abstract: The present invention provides a polytetrafluoroethylene powder having high dispersibility in lubricants. The polytetrafluoroethylene powder includes polytetrafluoroethylene containing a tetrafluoroethylene unit alone or a tetrafluoroethylene unit and a modifying monomer unit based on a modifying monomer copolymerizable with the tetrafluoroethylene, and has a specific surface area of 32 m2/g or larger.
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9.发明公开公开(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.
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公开(公告)号：US11814490B2
公开(公告)日：2023-11-14
申请号：US17078365
申请日：2020-10-23
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
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.
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