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11.发明申请公开(公告)号：US20210032381A1
公开(公告)日：2021-02-04
申请号：US16967965
申请日：2019-02-07
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
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 R5 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 and a composition including a fluoropolymer and the surfactant.
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12.发明申请公开(公告)号：US20220275119A1
公开(公告)日：2022-09-01
申请号：US17628807
申请日：2020-07-27
发明人： Hiroyuki SATO , Taketo KATO , Kenji ICHIKAWA , Yohei FUJIMOTO , Taku YAMANAKA
IPC分类号： C08F114/26 , C08K5/01 , C08K3/08
摘要： Provided is a method for producing a fluoropolymer, including a polymerization step of polymerizing a fluoromonomer in an aqueous medium having a pH of 4.0 or more in the presence of a hydrocarbon surfactant and a polymerization initiator to obtain a fluoropolymer.
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13.发明申请公开(公告)号：US20220169830A1
公开(公告)日：2022-06-02
申请号：US17672013
申请日：2022-02-15
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 , Hiroyuki SATO , Yuuji TANAKA , Kenji ICHIKAWA , Yohei FUJIMOTO
摘要： A surfactant for polymerization including at least one selected from 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, wherein R1a, R2a, R3a, Xa, R1b, R2b, R3b, R4b, L and Xb are as defined herein. Also disclosed is a composition containing a fluoropolymer and the at least one surfactant, a composition containing a fluoropolymer and a compound represented by (H—(CF2)8—SO3)qM2, where M2 is as defined herein, and a molded article made from the composition containing a fluoropolymer and the compound represented by (H—(CF2)8—SO3)qM2.
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公开(公告)号：US20220002531A1
公开(公告)日：2022-01-06
申请号：US17293591
申请日：2019-11-19
发明人： Yoshinori NANBA , Kenji ICHIKAWA , Yohei FUJIMOTO , Hirotoshi YOSHIDA , Hiroyuki SATO , Taketo KATO , Kengo ITO , Taku YAMANAKA
IPC分类号： C08L27/18 , C08F214/26 , C08L29/10
摘要： A method for producing modified polytetrafluoroethylene including: polymerizing tetrafluoroethylene and a modifying monomer in an aqueous medium in the presence of a polymer (I) containing a polymerization unit (I) based on a monomer represented by the following general formula (I) to obtain a modified polytetrafluoroethylene: 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. Also disclosed is a composition containing the modified polytetrafluoroethylene and the polymer (I).
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公开(公告)号：US20210355254A1
公开(公告)日：2021-11-18
申请号：US17280940
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： C08F114/26 , C08L27/18
摘要： 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：US20210221992A1
公开(公告)日：2021-07-22
申请号：US17262368
申请日：2019-07-23
发明人： Taketo KATO , Yohei FUJIMOTO , Kenji ICHIKAWA , Hiroyuki SATO , Ryota USAMI , Yoshinori NANBA , Hirotoshi YOSHIDA , Kengo ITO , Chiaki OKUI , Masamichi SUKEGAWA , Taku YAMANAKA , Yosuke KISHIKAWA , Hirokazu AOYAMA , Satoru YONEDA , Sumi ISHIHARA , Masahiro HIGASHI , Akiyoshi YAMAUCHI , Shinnosuke NITTA , Marina NAKANO
摘要： A polytetrafluoroethylene having a breaking strength of 10.0 N or more and a thermal instability index (TII) of 20 or more. Also disclosed is a stretched body including the polytetrafluoroethylene.
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17.发明申请公开(公告)号：US20210115224A1
公开(公告)日：2021-04-22
申请号：US16498849
申请日：2018-03-30
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 NAN BA , Kengo ITO , Chiaki OKUI , Hirokazu AOYAMA , Masamichi SUKEGAWA , Taku YAMANAKA , Hiroyuki SATO , Yuuji TANAKA , Kenji ICHIKAWA , Yohei FUJIMOTO
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 includes at least one selected from the group consisting of a surfactant represented by R1a—CO—R2 a—CO—R3a—OSO3Xa and a surfactant represented by R1b—CO—(CR2b2)n—(OR3b)p—(CR4b2)q-L-OSO3Xb.
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公开(公告)号：US20210095054A1
公开(公告)日：2021-04-01
申请号：US16978395
申请日：2019-03-07
发明人： Hirotoshi YOSHIDA , Taketo KATO , Kenji ICHIKAWA , Yohei FUJIMOTO , Yoshinori NANBA , Kengo ITO , Masahiro HIGASHI , Satoru YONEDA , Akiyoshi YAMAUCHI , Sumi ISHIHARA , Moe HOSOKAWA , Marina NAKANO , Yuuji TANAKA , Yosuke KISHIKAWA , Hirokazu AOYAMA , Masamichi SUKEGAWA , Taku YAMANAKA , Hiroyuki SATO
IPC分类号： C08F2/20 , C08F214/26 , C08K5/09
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, wherein the surfactant is a carboxylic acid type hydrocarbon-containing surfactant.
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