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1.发明公开公开(公告)号：US20240317907A1
公开(公告)日：2024-09-26
申请号：US18655177
申请日：2024-05-03
发明人： 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
CPC分类号： C08F14/26 , C08K5/098 , C08K5/42 , C08K2201/014 , C08K2201/019
摘要： Composition including (a) a fluoropolymer; and (b1) at least one of a compound represented by the formula (4) ((H—(CF2)7—COO)pM1) or the formula (4′) ((H—(CF2)8—COO)pM1) of the present disclosure, both respectively in an amount of 100 ppb or less relative to the fluoropolymer, or (b2) at least one of a compound represented by the formula (5) ((H—(CF2)13—COO)pM1) or the formula (5′) ((H—(CF2)14—COO)pM1) of the present disclose, both respectively in an amount of 100 ppb or less relative to the fluoropolymer.
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2.发明公开公开(公告)号：US20230220129A1
公开(公告)日：2023-07-13
申请号：US18119371
申请日：2023-03-09
发明人： Taketo KATO , Satoru YONEDA , Masahiro HIGASHI , Akiyoshi YAMAUCHI , Sumi ISHIHARA , Yosuke KISHIKAWA , Moe HOSOKAWA , Marina NAKANO , Hirotoshi YOSHIDA , Yoshinori NANBA , Kengo ITO , Chiaki OKUI , Kenji ICHIKAWA , Yohei FUJIMOTO , Hirokazu AOYAMA , Masamichi SUKEGAWA , Taku YAMANAKA , Hiroyuki SATO
IPC分类号： C08L27/18 , C08F2/28 , C08F114/26 , C08K5/19
CPC分类号： C08L27/18 , C08F2/28 , C08F114/26 , C08K5/19
摘要： 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 being represented by the general formula (1): CR1R2R4—CR3R5—X-A, wherein R1 to R5 are each H or a monovalent substituent, with the proviso that at least one of R1 and R3 represents a group represented by the general formula: —Y—R6 and at least one of R2 and R3 represents a group represented by the general formula: —X-A or a group represented by the general formula: —Y—R6; and A is the same or different at each occurrence and is —COOM, —SO3M, or —OSO3M. Also disclosed is a surfactant for polymerization represented by the general formula (1), a method for producing a fluoropolymer using the surfactant, a composition including a fluoropolymer and the surfactant and a molded body including the composition.
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3.发明公开公开(公告)号：US20230183430A1
公开(公告)日：2023-06-15
申请号：US18103443
申请日：2023-01-30
发明人： Ken YOSHIDA , Hirotoshi YOSHIDA , Keisuke HAGI , Masayuki TSUJI , Taketo KATO , Yuuji TANAKA , Taku YAMANAKA , Kazuya KAWAHARA , Masamichi SUKEGAWA , Kazutaka HOSOKAWA
CPC分类号： C08J3/12 , C08J3/28 , C08F8/50 , C08F8/06 , C08F14/26 , C08F2800/20 , C08J2327/22 , C08F2810/40 , C08F2500/07 , C08F2500/17 , C08J2327/18
摘要： 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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公开(公告)号：US20220315713A1
公开(公告)日：2022-10-06
申请号：US17602448
申请日：2020-04-16
发明人： Chiaki OKUI , Hirotoshi YOSHIDA , Hiroyuki SATO , Kenji ICHIKAWA , Taketo KATO , Taku YAMANAKA
摘要： A method for producing a fluoropolymer powder including (A1) adding, to a fluoropolymer aqueous dispersion obtained by polymerization using a carboxylic acid type hydrocarbon surfactant, and an acid to adjust a pH to 4.0 or less and cause coagulation to thereby obtain a wet fluoropolymer powder containing a fluorine-containing compound represented by the following general formula (1A), and (B1) heat-treating the wet fluoropolymer powder at a temperature higher than 150° C. and lower than 240° C.: General Formula (1A): H—(CF2)m—COOH wherein m is 3 to 19.
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公开(公告)号：US20210363311A1
公开(公告)日：2021-11-25
申请号：US16968033
申请日：2019-02-05
摘要： 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：US20210340290A1
公开(公告)日：2021-11-04
申请号：US17280554
申请日：2019-10-03
发明人： Taketo KATO , Yohei FUJIMOTO , Kenji ICHIKAWA , Hiroyuki SATO , Yoshinori NANBA , Hirotoshi YOSHIDA , Kengo ITO , Chiaki OKUI , Masamichi SUKEGAWA , Taku YAMANAKA
IPC分类号： C08F14/26
摘要： A method for producing polytetrafluoroethylene which include polymerizing tetrafluoroethylene and a modifying monomer in an aqueous medium in the presence of a hydrocarbon surfactant to obtain polytetrafluoroethylene. An amount of the hydrocarbon surfactant at the initiation of polymerization is more than 50 ppm based on the aqueous medium. Further, the polytetrafluoroethylene contains 99.0% by mass or more of a polymerization unit based on tetrafluoroethylene and 1.0% by mass or less of a polymerization unit based on the modifying monomer.
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公开(公告)号：US20200255551A1
公开(公告)日：2020-08-13
申请号：US16637601
申请日：2018-08-10
发明人： Takahiro TAIRA , Kazuhiro MISHIMA , Chiaki OKUI , Tadao HAYASHI , Hirotoshi YOSHIDA , Yuuji TANAKA , Masayoshi MIYAMOTO , Taku YAMANAKA , Taketo KATO
IPC分类号： C08F6/06
摘要： 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: Formula (1): (H—(CF2)m—COO)pM1; or Formula (2): (H—(CF2)n—SO3)qM2.Also disclosed is a composition containing polytetrafluoroethylene substantially free from a compound represented by Formula (3) below and a molded body including the composition: Formula (3): (H—(CF2)8—SO3)qM2.
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公开(公告)号：US20220259337A1
公开(公告)日：2022-08-18
申请号：US17606368
申请日：2020-04-27
摘要： A method for producing a fluoropolymer aqueous dispersion, including a step A of performing ultrafiltration, microfiltration, or dialysis membrane treatment, or a combination thereof on a pretreatment aqueous dispersion containing a fluoropolymer obtained by polymerization in the presence of a polymer (I) including a polymerized unit (I) derived from a monomer represented by the following general formula (I), with the proviso that the fluoropolymer is other than the polymer (I): CX1X3═CX2R(—CZ1Z2-A0)m (I) wherein X1 and X3 are each independently F, Cl, H, or CF3; X2 is H, F, an alkyl group, or a fluorine-containing alkyl group; A0 is an anionic 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：US20220119556A1
公开(公告)日：2022-04-21
申请号：US17428677
申请日：2020-02-07
发明人： Takahiro TAIRA , Chiaki OKUI , Hirotoshi YOSHIDA , Yuuji TANAKA , Taku YAMANAKA , Taketo KATO
摘要： A composition having a breaking strength of 10.0 N or more, containing a polytetrafluoroethylene, and substantially free from a compound represented by the following general formula (3): (H—(CF2)8—SO3)qM2 General Formula (3): wherein M2 is H, a metal atom, NR54, where each R5 may be 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 q is 1 or 2.
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10.发明申请公开(公告)号：US20190040218A1
公开(公告)日：2019-02-07
申请号：US15757708
申请日：2016-08-30
摘要： A manufacturing method for a polytetrafluoroethylene formed product according to an aspect of the invention is a manufacturing method for a polytetrafluoroethylene formed product, the method including a step of irradiating a forming material containing a polytetrafluoroethylene as a principal component with ionizing radiation, wherein the polytetrafluoroethylene has a melt viscosity at 380° C. of not greater than 7×105 Pa·s.
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