-
公开(公告)号：EP4212556A1
公开(公告)日：2023-07-19
申请号：EP21864481.3
申请日：2021-09-07
发明人： YAMABE, Takuya , YAMAMOTO, Emi , SODA, Yoshihiro , YAMANAKA, Taku , USAMI, Ryota , KATO, Taketo , SHIROMARU, Tomohiro , NAKATANI, Yasukazu
IPC分类号： C08F6/14 , C08F214/26 , C08K5/053 , C08K5/06 , C08L27/18 , C08L33/04 , C09D127/18 , C08L71/02 , C09D7/63
摘要： Provided is a modified polytetrafluoroethylene aqueous dispersion having low viscosity at high temperature. The modified polytetrafluoroethylene aqueous dispersion contains a modified polytetrafluoroethylene and a nonionic surfactant, has a modified polytetrafluoroethylene solid concentration of 50 to 70% by mass, is substantially free from a fluorine-containing surfactant, and has a viscosity at 55°C of 80 mPa·s or lower, and the modified polytetrafluoroethylene contains 0.050% by mass or more and 1.00% by mass or less of a polymerized unit based on a modifying monomer.
-
公开(公告)号：EP4026855A1
公开(公告)日：2022-07-13
申请号：EP20861189.7
申请日：2020-09-07
发明人： NANBA, Yoshinori , YAMAMOTO, Emi , YAMABE, Takuya , FUJIMOTO, Yohei , ICHIKAWA, Kenji , KATO, Taketo , YAMANAKA, Taku , YOSHIDA, Hirotoshi
摘要： Provided is a composition comprising a polytetrafluoroethylene, a polymer (I) containing a polymerization unit (I) based on a monomer represented by the general formula (I), a nonionic surfactant, and an aqueous medium, wherein a content of the polytetrafluoroethylene in the composition is 10% by mass or more based on the composition, and a content of the nonionic surfactant in the composition is 1.0% by mass or more based on the polytetrafluoroethylene,
CX 1 X 3 =CX 2 R(-CZ 1 Z 2 -A 0 ) m (I)
wherein X 1 and X 3 are each independently F, Cl, H, or CF 3 ; X 2 is H, F, an alkyl group, or a fluorine-containing alkyl group; A 0 is an anionic group; R is a linking group; Z 1 and Z 2 are each independently H, F, an alkyl group, or a fluorine-containing alkyl group; and m is an integer of 1 or more.-
公开(公告)号：EP4026854A1
公开(公告)日：2022-07-13
申请号：EP20860627.7
申请日：2020-09-07
发明人： YAMAMOTO, Emi , YAMABE, Takuya , SODA, Yoshihiro , YAMANAKA, Taku , TAIRA, Takahiro , FUJIMOTO, Yohei , KATO, Taketo
摘要： Provided is a PTFE aqueous dispersion having low viscosity at high temperature. The PTFE aqueous dispersion contains PTFE and a nonionic surfactant, has a PTFE solid concentration of 50 to 70% by mass, is substantially free from a fluorine-containing surfactant, and has a viscosity at 55°C of 50 mPa·s or lower.
-
公开(公告)号：EP3957656A1
公开(公告)日：2022-02-23
申请号：EP20791021.7
申请日：2020-04-16
发明人： OKUI, Chiaki , YOSHIDA, Hirotoshi , SATO, Hiroyuki , ICHIKAWA, Kenji , KATO, Taketo , YAMANAKA, Taku
摘要： A method for producing a fluoropolymer powder including (Al) adding, to a fluoropolymer aqueous dispersion obtained by polymerization using a carboxylic acid type hydrocarbon surfactant, 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 (Bl) heat-treating the wet fluoropolymer powder at a temperature higher than 150°C and lower than 240°C:
General Formula (1A) : H-(CF 2 ) m -COOH
wherein m is 3 to 19.-
公开(公告)号：EP3919527A1
公开(公告)日：2021-12-08
申请号：EP20749007.9
申请日：2020-01-31
发明人： KATO, Taketo , FUJIMOTO, Yohei , ICHIKAWA, Kenji , SATO, Hiroyuki , NANBA, Yoshinori , YOSHIDA, Hirotoshi , ITO, Kengo , YAMANAKA, Taku
摘要： A method for producing polytetrafluoroethylene includes a step of polymerizing tetrafluoroethylene in an aqueous medium in the presence of a hydrocarbon surfactant and a polymerization initiator to obtain polytetrafluoroethylene and a step of adding at least one selected from the group consisting of a radical scavenger and a decomposer of a polymerization initiator after the initiation of polymerization.
-
公开(公告)号：EP3862370A1
公开(公告)日：2021-08-11
申请号：EP19868932.5
申请日：2019-10-03
发明人： KATO, Taketo , FUJIMOTO, Yohei , ICHIKAWA, Kenji , SATO, Hiroyuki , NANBA, Yoshinori , YOSHIDA, Hirotoshi , ITO, Kengo , OKUI, Chiaki , SUKEGAWA, Masamichi , YAMANAKA, Taku
IPC分类号： C08F214/26 , C08F2/24 , C08F214/18 , C08F214/28
摘要： Provided is a method for producing polytetrafluoroethylene including polymerizing tetrafluoroethylene and a modifying monomer in an aqueous medium in the presence of a hydrocarbon surfactant to obtain polytetrafluoroethylene, wherein an amount of the hydrocarbon surfactant at the initiation of polymerization is more than 50 ppm based on the aqueous medium, and 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.
-
公开(公告)号：EP3828208A1
公开(公告)日：2021-06-02
申请号：EP19840194.5
申请日：2019-07-23
发明人： KATO, Taketo , FUJIMOTO, Yohei , ICHIKAWA, Kenji , SATO, Hiroyuki , USAMI, Ryota , NANBA, Yoshinori , YOSHIDA, Hirotoshi , ITO, Kengo , OKUI, Chiaki , SUKEGAWA, Masamichi , YAMANAKA, Taku , KISHIKAWA, Yosuke , AOYAMA, Hirokazu , YONEDA, Satoru , ISHIHARA, Sumi , HIGASHI, Masahiro , YAMAUCHI, Akiyoshi , NITTA, Shinnosuke , NAKANO, Marina
摘要： The present disclosure provides polytetrafluoroethylene having excellent stretchability.
Provided in the present disclosure is a polytetrafluoroethylene having a standard specific gravity of 2.175 or less and a thermal instability index (TII) of 20 or more.-
公开(公告)号：EP3760649A1
公开(公告)日：2021-01-06
申请号：EP19760711.2
申请日：2019-03-01
发明人： NANBA, Yoshinori , ICHIKAWA, Kenji , FUJIMOTO, Yohei , YOSHIDA, Hirotoshi , SATO, Hiroyuki , KATO, Taketo , ITO, Kengo , ISHIHARA, Sumi , HIGASHI, Masahiro , YONEDA, Satoru , AOYAMA, Hirokazu , SUKEGAWA, Masamichi , KISHIKAWA, Yosuke , TAIRA, Takahiro , OKUI, Chiaki , YAMANAKA, Taku
摘要： An object of the present disclosure is to provide a novel method for producing a fluoropolymer. The present disclosure relates to a method for producing a fluoropolymer, comprising polymerizing a fluoromonomer in an aqueous medium in the presence of a polymer (1) to provide a fluoropolymer, the polymer (1) comprising a polymerized unit (1) derived from a monomer represented by the following general formula (1): CX 2 =CY(-CZ 2 -O-Rf-A) (1)
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 fluorine-containing alkylene group having 1 to 40 carbon atoms or a fluorine-containing alkylene group having 2 to 100 carbon atoms and having an ether bond; and A is -COOM, - SO 3 M, or -OSO 3 M, wherein M is -H, a metal atom, -NR 7 4 , imidazolium optionally having a substituent, pyridinium optionally having a substituent, or phosphonium optionally having a substituent, wherein R 7 is H or an organic group, with the proviso that at least one of X, Y, and Z contains a fluorine atom.-
公开(公告)号：EP2583735B1
公开(公告)日：2020-09-09
申请号：EP11795624.3
申请日：2011-06-08
-
公开(公告)号：EP2621967B1
公开(公告)日：2020-08-05
申请号：EP11829431.3
申请日：2011-09-29
-
-
-
-
-
-
-
-
-
搜索结果
77 条记录 (耗时 0.017 秒)
