公开(公告)号：US20210163648A1

公开(公告)日：2021-06-03

申请号：US17173455

申请日：2021-02-11

Applicant: AGC Inc.

Inventor： Satoko YASUDA ,  Takehiro KOSE ,  Yukiko HATTORI ,  Toshikazu YONEDA

IPC: C08F214/26 ,  C08F214/22 ,  C08F214/28 ,  C08F214/16 ,  C08F236/20 ,  C08L23/12

Abstract: To provide a fluorinated copolymer excellent in low temperature properties and crosslinking property as a fluororubber, and a method for producing it.
A fluorinated copolymer which has units based on tetrafluoroethylene, units based on propylene and units based on a compound represented by the following formula 1, and which has either one or both of iodine atoms and bromine atoms: CF2═CFO(Rf1O)nRf2  formula 1 wherein Rf1 is a C1-3 perfluoroalkylene group, Rf2 is a C1-6 perfluoroalkyl group, n is an integer of from 1 to 4, and in a case where n is from 2 to 4, a plurality of Rf1 may be the same or different.

公开(公告)号：US20220227908A1

公开(公告)日：2022-07-21

申请号：US17658271

申请日：2022-04-07

Applicant: AGC Inc.

Inventor： Yukiko HATTORI ,  Tsuyoshi KAWAI ,  Takeshi YAMADA ,  Kuniaki AKATSU

IPC: C08F214/26

Abstract: To provide a fluorinated copolymer, whereby it is possible to produce a crosslinked rubber article excellent in mold release properties.
The fluorinated copolymer of the present invention has units based on tetrafluoroethylene, units based on a perfluoro(alkyl vinyl ether), units based on a monomer having a fluorine atom and at least two polymerizable unsaturated bonds, and units based on a monomer having a nitrile group and a fluorine atom.

公开(公告)号：US20210403623A1

公开(公告)日：2021-12-30

申请号：US17470469

申请日：2021-09-09

Applicant: AGC Inc.

Inventor： Kosuke SHIBASAKI ,  Yukiko HATTORI ,  Shinya HIGUCHI ,  Junko ANZAI

IPC: C08F214/26

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 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.

公开(公告)号：US20240026048A1

公开(公告)日：2024-01-25

申请号：US18480619

申请日：2023-10-04

Applicant: AGC Inc.

Inventor： Yukiko HATTORI ,  Tsuyoshi KAWAI

IPC: C08F214/26 ,  C08F236/20 ,  C08C19/12 ,  C08C19/22 ,  C08K5/14 ,  C08K5/3492

CPC classification number: C08F214/262 ,  C08F236/20 ,  C08C19/12 ,  C08C19/22 ,  C08K5/14 ,  C08K5/34924

Abstract: To provide a fluorinated copolymer capable of producing a cross-linked rubber article with excellent mold-releasing properties, a method for producing the fluorinated copolymer, a fluorinated copolymer composition, and a cross-linked rubber article. The fluorinated copolymer of the present invention is a fluorinated copolymer having units based on tetrafluoroethylene, units based on a perfluoro(alkyl vinyl ether), units based on a monomer having a fluorine atom and at least two polymerizable unsaturated bonds, and units based on a monomer having a nitrile group and a fluorine atom, wherein when the storage modulus of the fluorinated copolymer at an angular frequency of 0.3 rad/s is G′0.3 and the storage modulus of the fluorinated copolymer at an angular frequency of 0.03 rad/s is G′0.03 as determined by dynamic viscoelasticity measurement at 140° C., G′0.3/G′0.03 is from 1.00 to 1.45.

公开(公告)号：US20210380794A1

公开(公告)日：2021-12-09

申请号：US17411227

申请日：2021-08-25

Applicant: AGC Inc.

Inventor： Yukiko HATTORI ,  Tsuyoshi KAWAI ,  Takeshi YAMADA ,  Takehiro KOSE

IPC: C08L27/18 ,  C08F214/26 ,  C08J3/24 ,  C08L21/02

Abstract: To provide a method for producing crosslinked rubber excellent in hardness and transparency.
The method for producing crosslinked rubber of the present invention is a method for producing crosslinked rubber, which comprises crosslinking a fluorinated copolymer in a composition comprising the fluorinated copolymer, a crosslinking agent and a crosslinking co-agent, wherein the fluorinated copolymer is a copolymer having units based on tetrafluoroethylene and units based on a perfluoro(alkyl vinyl ether), the content of the units based on tetrafluoroethylene is from 65 to 90 mol % to all units of the fluorinated copolymer, in the composition, the content of the crosslinking agent is from 0.03 to 0.7 part by mass to 100 parts by mass of the fluorinated copolymer, the content of the crosslinking co-agent is from 0.1 to 2.5 parts by mass to 100 parts by mass of the fluorinated copolymer, and the hardness is from 65 to 100.