公开(公告)号：US20230212331A1

公开(公告)日：2023-07-06

申请号：US18181687

申请日：2023-03-10

Applicant: AGC Inc.

Inventor： Kosuke SHIBASAKI ,  Shintaro FUKUNAGA ,  Daisuke TAGUCHI

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

CPC classification number: C08F14/26 ,  C08F14/24 ,  C08F14/22

Abstract: 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

Applicant: AGC Inc.

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

IPC: C08F214/26

CPC classification number: C08F214/265

Abstract: 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：US20210023757A1

公开(公告)日：2021-01-28

申请号：US17070999

申请日：2020-10-15

Applicant: AGC Inc.

Inventor： Yoshiaki HIGUCHI ,  Shintaro FUKUNAGA ,  Takatoshi YAOITA

IPC: B29C48/08 ,  B29C48/88 ,  B32B27/08 ,  B32B27/30

Abstract: To provide a process for producing a film excellent in water vapor barrier property, tensile elongations and transparency.
A resin material containing polychlorotrifluoroethylene (PCTFE) is melted and extruded into a film from an extrusion die, the extruded product is brought into contact with a cooling roll having a surface temperature of at most 120° C. in a state such that the surface temperature of the extruded product is higher than the crystallization temperature of PCTFE to form a film web, and the film web is subjected to heat treatment at from 80 to 200° C. to obtain a film.

公开(公告)号：US20230391934A1

公开(公告)日：2023-12-07

申请号：US18366743

申请日：2023-08-08

Applicant: AGC Inc.

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

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

CPC classification number: C08F214/265 ,  C08K3/08 ,  H01B3/445 ,  C08K2003/085 ,  C08K2201/012

Abstract: 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：US20200157288A1

公开(公告)日：2020-05-21

申请号：US16750115

申请日：2020-01-23

Applicant: AGC Inc.

Inventor： Shigeru AIDA ,  Kaori ABE ,  Shintaro FUKUNAGA

IPC: C08J3/09 ,  C08F214/26 ,  C09D127/18

Abstract: Provided is a fluorine-containing copolymer composition capable of forming a uniform coating.The composition comprises a fluorine-containing copolymer having units derived from tetrafluoroethylene, units derived from ethylene, and 0.4 to 1.0 mol % of at least one functional group selected from the group consisting of a carbonyl group-containing group, an acid anhydride group, a carboxy group, a hydroxy group, an epoxy group, an amide group, an amino group, and an isocyanate group, and an aliphatic compound having 6 to 10 carbon atoms having one carbonyl group.