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公开(公告)号：US20220282007A1
公开(公告)日：2022-09-08
申请号：US17747547
申请日：2022-05-18
发明人： Taku YAMANAKA , Masahiro HIGASHI , Taketo KATO , Kenji ICHIKAWA , Yohei FUJIMOTO , Masaki IRIE , Soushi TSUCHIYA , Souta YUASA
IPC分类号： C08F14/26
摘要： A method for producing a fluoropolymer, which includes: polymerizing a monomer (I) represented by the general formula (I) below in an aqueous medium substantially in the absence of a fluorine-containing surfactant (except for the monomer (I) represented by the general formula (I)) to obtain a crude composition containing a polymer of the monomer (I); removing a dimer and a trimer of the monomer (I) contained in the crude composition from the crude composition to obtain a polymer (I) in which the content of the dimer and trimer of the monomer (I) is 1.0% by mass or less based on the polymer (I); and polymerizing a fluoromonomer in an aqueous medium in the presence of the polymer (I) to obtain a fluoropolymer: CX1X3═CX2R(—CZ1Z2-A0)m (I) wherein X1 and X3, X2, A0, R, Z1 and Z2 are as defined herein.
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公开(公告)号：US20220340694A1
公开(公告)日：2022-10-27
申请号：US17849195
申请日：2022-06-24
发明人： Rina TAMAI , Tatsuya MORIKAWA , Souta YUASA , Soushi TSUCHIYA , Kouhei TAKEMURA , Kazuyoshi KAWASAKI , Masaki IRIE
摘要： Provided is a method for producing a fluorine-containing polymer, comprising polymerizing a fluorine-containing monomer in the presence of a fluorine-free compound (1) represented by general formula (1), a polymerization initiator, and an aqueous medium to produce the fluorine-containing polymer: CX1X2═CX3—R—Z General formula (1): wherein X1, X2, and X3 are each independently H or an alkyl group; R is a single bond or an alkylene group; the total number of carbon atoms of X1, X2, X3, and R is 0 to 5; Z is —SO3M, —OSO3M, —P(═O)(OM)2, —OP(O)(OM)2, or —B(OM)2; M is H, a metal atom, NR14, optionally substituted imidazolium, optionally substituted pyridinium, or optionally substituted phosphonium; and R1 is independently H or an organic group, and any two R1 may be bonded to each other to form a ring.
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公开(公告)号：US20220282008A1
公开(公告)日：2022-09-08
申请号：US17747685
申请日：2022-05-18
发明人： Yoshinori NANBA , Taketo KATO , Kenji ICHIKAWA , Soushi TSUCHIYA , Souta YUASA , Yosuke KISHIKAWA , Masahiro HIGASHI , Masaki IRIE , Taku YAMANAKA
摘要： The present disclosure provides a method for producing a fluoropolymer, the method includes polymerizing a fluoromonomer in an aqueous medium in the presence of a polymer (1) to obtain a fluoropolymer, wherein the polymer (1) is a polymer of a monomer (1) represented by the general formula (1) below, in which the content of a dimer and a trimer of the monomer (1) is 1.0% by mass or less based on the polymer (1): CF2═CF—R—CZ1Z1-A0 (1) wherein R is a linking group; Z1 and Z2 are each independently F or CF3; and A0 is an anionic group.
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