公开(公告)号：US20230391934A1

公开(公告)日：2023-12-07

申请号：US18366743

申请日：2023-08-08

申请人： AGC Inc.

发明人： Kosuke SHIBASAKI ,  Shuma KAWANAMI ,  Daisuke TAGUCHI ,  Shintaro FUKUNAGA ,  Mie TAKAYAMA ,  Kazuhiro NAKABAYASHI

IPC分类号： C08F214/26 ,  C08K3/08 ,  H01B3/44

CPC分类号： C08F214/265 ,  C08K3/08 ,  H01B3/445 ,  C08K2003/085 ,  C08K2201/012

摘要： To provide a copolymer capable of forming a coated electrical wire excellent in engine oil resistance, a composition, a molded product, and a coated electrical wire. The copolymer of the present invention is a copolymer comprising units based on ethylene, units based on tetrafluoroethylene, and units based on compound A represented by CH═CX(CF2)nY (wherein X and Y are each independently a hydrogen atom or a fluorine atom, and n is an integer of from 2 to 6) or compound B represented by CF2═CF—O—C3F7, wherein the crystal lamella thickness determined by the small angle X-ray scattering method is at most 4.0 nm and the melting point is at least 245° C.

公开(公告)号：US20230212331A1

公开(公告)日：2023-07-06

申请号：US18181687

申请日：2023-03-10

申请人： AGC Inc.

发明人： Kosuke SHIBASAKI ,  Shintaro FUKUNAGA ,  Daisuke TAGUCHI

IPC分类号： C08F14/26 ,  C08F14/24 ,  C08F14/22

CPC分类号： C08F14/26 ,  C08F14/24 ,  C08F14/22

摘要： To provide a method for producing a fluorinated polymer which does not require an emulsifier as an essential component while an aqueous medium with little environmental burden is used. A method for producing a fluorinated polymer, which comprises polymerizing at least one fluorinated polymer selected from tetrafluoroethylene, chlorotrifluoroethylene and vinylidene fluoride, in an aqueous medium in the presence of a specific polymer having at least one type of units selected from units based on a compound represented by the formula (1) and units based on a compound represented by the formula (2) to produce a fluorinated polymer (provided that when tetrafluoroethylene is polymerized, tetrafluoroethylene is polymerized so that the content of units based on tetrafluoroethylene in the fluorinated polymer becomes less than 99 mass % to all units in the fluorinated polymer):


CXY═CR1—COO-(L-O)n—R2  formula (1):



CXY═CR3—(O)m—CH2—Z—R4  formula (2):

公开(公告)号：US20240117088A1

公开(公告)日：2024-04-11

申请号：US18519169

申请日：2023-11-27

申请人： AGC Inc.

发明人： Kosuke SHIBASAKI ,  Yuki ORITO ,  Keiji HORI ,  Shintaro FUKUNAGA ,  Daisuke TAGUCHI

IPC分类号： C08F214/26

CPC分类号： C08F214/265

摘要： To provide a method for producing a fluorinated copolymer, whereby it is possible to efficiently produce a fluorinated copolymer in which coloration and foaming are suppressed during heating. A method for producing a fluorinated copolymer, comprising a step of producing a fluorinated copolymer by polymerizing tetrafluoroethylene and other monomer other than the tetrafluoroethylene in the presence of a hydroperoxide, at least one selected from the group consisting of a sulfite, a hydrogen sulfite, a dithionite, and a metabisulfite, at least one selected from the group consisting of an acidic substance and a substance that generates an acid by hydrolysis, and an aqueous medium.

公开(公告)号：US20210403623A1

公开(公告)日：2021-12-30

申请号：US17470469

申请日：2021-09-09

申请人： AGC Inc.

发明人： Kosuke SHIBASAKI ,  Yukiko HATTORI ,  Shinya HIGUCHI ,  Junko ANZAI

IPC分类号： C08F214/26

摘要： To provide a method for producing a fluorinated polymer which does not require an emulsifier as an essential component while an aqueous medium with little environmental burden is used.
A method for producing a fluorinated polymer, which comprises polymerizing at least one fluorinated monomer selected from tetrafluoroethylene, chlorotrifluoroethylene and vinylidene fluoride, in an aqueous medium in the presence of a first polymer having units based on a compound represented by the following formula (1): CXY═CR1-L-R2  (1) wherein X and Y are each independently a hydrogen atom, a halogen atom or a methyl group, R1 is a hydrogen atom, a halogen atom or a C1-3 alkyl group, L is —CO—O—*, —O—CO—* or —O—, provided that * represents the binding position to R2, and R2 is a cyclic alkyl group, a monovalent aromatic hydrocarbon group or a C1-6 linear alkyl group, provided that the C1-6 linear alkyl group as R2 may have an etheric oxygen atom in a carbon-carbon bond, and the hydrogen atom in the cyclic alkyl group, the monovalent aromatic hydrocarbon group or the C1-6 linear alkyl group as R2 may be replaced with a halogen atom.