公开(公告)号：US20200255567A1

公开(公告)日：2020-08-13

申请号：US16861276

申请日：2020-04-29

Applicant: AGC Inc.

Inventor： Satoko YASUDA ,  Keisuke Yagi ,  Takehiro Kose ,  Yukiko Hattori ,  Toshikazu Yoneda

IPC: C08F214/28 ,  C08F214/22 ,  C08F214/26 ,  C08F220/06 ,  C08F283/00

Abstract: To provide a fluorinated elastic copolymer excellent in adhesion, processability, mechanical properties, heat resistance and chemical resistance.A fluorinated elastic copolymer having units based on a monomer (a), units based on a monomer (b) and optionally units based on a monomer (c), which has an iodine atom bonded to a terminal of a molecular chain and the unit based on the monomer (b) adjacent to the iodine atom, and which has a proportion of the units based on the monomer (b) of from 0.09 to 2.0 mol % to all units. Monomer (a): monomer selected from the group consisting of tetrafluoroethylene, hexafluoropropylene, vinylidene fluoride, chlorotrifluoroethylene, a perfluoro(alkyl vinyl ether) and 2,3,3,3-tetrafluoropropene; monomer (b): a monomer having at least one type of functional group selected from the group consisting of an epoxy group, a hydroxy group, a carbonyl group-containing group and an isocyanate group; monomer (c): a monomer selected from the group consisting of ethylene and propylene.

公开(公告)号：US12264238B2

公开(公告)日：2025-04-01

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.

公开(公告)号：US11732073B2

公开(公告)日：2023-08-22

申请号：US16705441

申请日：2019-12-06

Applicant: AGC Inc.

Inventor： Yukiko Hattori ,  Takeshi Yamada ,  Takehiro Kose

IPC: C08F214/26 ,  C08F14/26 ,  C08K5/00 ,  C08F2/38

CPC classification number: C08F214/262 ,  C08F2/38 ,  C08F14/26 ,  C08K5/0025 ,  C08F2800/10 ,  C08F2810/20

Abstract: To provide a fluorinated elastic copolymer and a fluorinated elastic copolymer composition, whereby it is possible to obtain a crosslinked rubber article which has practically sufficient rubber physical properties and which is, at the same time, excellent in low-temperature characteristics; a crosslinked rubber article; and a method for producing a fluorinated elastic copolymer. The fluorinated elastic copolymer comprises units based on tetrafluoroethylene, units based on CF2═CFORf1 (Rf1 is a C1-10 perfluoroalkyl group), units based on CF2═CF(OCF2CF2)n—(OCF2)m—ORf2 (Rf2 is a C1-4 perfluoroalkyl group, n is an integer of from 0 to 3, m is an integer of from 0 to 4, and n+m is an integer of from 1 to 7), and units based on a fluorinated monomer having at least two polymerizable unsaturated bonds.

公开(公告)号：US20200216591A1

公开(公告)日：2020-07-09

申请号：US16820839

申请日：2020-03-17

Applicant: AGC Inc.

Inventor： Shinya HIGUCHI ,  Shiro Ebata ,  Takehiro Kose

IPC: C08F214/26 ,  C08J9/22 ,  B29C48/00

Abstract: To provide a modified PTFE excellent in heat resistance. The modified polytetrafluoroethylene comprises a polymer having units based on tetrafluoroethylene and a polymer having units based on a fluorine-free monomer, wherein the endothermic amount ratio R calculated by a prescribed method is at least 0.65.

公开(公告)号：US11981762B2

公开(公告)日：2024-05-14

申请号：US16820839

申请日：2020-03-17

Applicant: AGC Inc.

Inventor： Shinya Higuchi ,  Shiro Ebata ,  Takehiro Kose

IPC: C08F214/26 ,  B29C48/00 ,  C08J9/22 ,  B29K27/18

CPC classification number: C08F214/265 ,  B29C48/0018 ,  B29C48/022 ,  C08J9/22 ,  B29K2027/18 ,  C08J2201/034 ,  C08J2327/22

Abstract: To provide a modified PTFE excellent in heat resistance. The modified polytetrafluoroethylene comprises a polymer having units based on tetrafluoroethylene and a polymer having units based on a fluorine-free monomer, wherein the endothermic amount ratio R calculated by a prescribed method is at least 0.65.

公开(公告)号：US11512151B2

公开(公告)日：2022-11-29

申请号：US16814106

申请日：2020-03-10

Applicant: AGC Inc.

Inventor： Shinya Higuchi ,  Shiro Ebata ,  Takehiro Kose

IPC: C08F2/16 ,  C08F214/26 ,  C08J3/16 ,  C08F265/04

Abstract: A method for producing a modified polytetrafluoroethylene, the method including: polymerizing tetrafluoroethylene in an aqueous medium in which a polymer having units based on a fluorine-free monomer is present. The fluorine-free monomer is a monomer represented by formula (1): CH2═CR1-L-R2, where R1 is a hydrogen atom or an alkyl group, L is a single bond, —CO—O—*, —O—CO—* or —O—, * is a bonding position to R2, and R2 is an alkyl group. To the total amount of tetrafluoroethylene supplied to the polymerization, a proportion of the polymer is from 0.001 to 0.050 mass %.

公开(公告)号：US20210009732A1

公开(公告)日：2021-01-14

申请号：US17021129

申请日：2020-09-15

Applicant: AGC Inc.

Inventor： Shinya Higuchi ,  Shiro Ebata ,  Takehiro Kose

IPC: C08F214/26 ,  C08F2/10 ,  C08J3/16

Abstract: To provide a method for producing modified polytetrafluoroethylene, in which formation of a fluorinated oligomer as a by-product is little. A method for producing modified polytetrafluoroethylene which contains substantially no C6-34 fluorinated oligomer containing hydrophilic functional groups and which contains substantially no fluorinated surfactant, the method comprising conducting copolymerization of tetrafluoroethylene and a monomer having a polar group, in a liquid dispersion 1 comprising a polymer containing units derived from a non-fluorinated monomer and an aqueous medium, or in a solution 2 obtainable by mixing at least one member selected from the group consisting of a polyalkylene oxide compound and a hydrocarbon-containing surfactant, with an oxidizing agent, in an aqueous medium, under such a condition that the amount of the monomer having a polar group to be used, is at most 0.150 mass % to the whole amount of tetrafluoroethylene, to obtain modified polytetrafluoroethylene.

公开(公告)号：US20200216583A1

公开(公告)日：2020-07-09

申请号：US16819749

申请日：2020-03-16

Applicant: AGC Inc.

Inventor： Shinya HIGUCHI ,  Shiro Ebata ,  Takehiro Kose

IPC: C08F14/26 ,  B29C48/00

Abstract: To provide a modified polytetrafluoroethylene excellent in breaking strength. The modified polytetrafluoroethylene comprises a polymer having units based on tetrafluoroethylene and a polymer having units based on a monomer represented by formula (1), wherein the content of the units based on a monomer represented by formula (1) is from 10 to 500 mass ppm, to all units in the modified polytetrafluoroethylene, and the standard specific gravity is from 2.155 to 2.175, CH2═CR1-L-R2  Formula (1) wherein R1 represents a hydrogen atom or an alkyl group, L represents a single bond, —CO—O—*, —O—CO—*, or —O—, * represents a bonding position to R2, and R2 represents a hydrogen atom, an alkyl group, or a nitrile group.

公开(公告)号：US11884755B2

公开(公告)日：2024-01-30

申请号：US16819749

申请日：2020-03-16

Applicant: AGC Inc.

Inventor： Shinya Higuchi ,  Shiro Ebata ,  Takehiro Kose

IPC: C08F14/26 ,  B29C48/00 ,  C08F214/26 ,  C08J5/18 ,  B29K27/18

CPC classification number: C08F14/26 ,  B29C48/0018 ,  B29C48/022 ,  C08F214/265 ,  C08J5/18 ,  B29K2027/18 ,  C08J2327/22 ,  C08F214/26 ,  C08F220/06 ,  C08F214/26 ,  C08F220/1804 ,  C08F214/26 ,  C08F218/08

Abstract: To provide a modified polytetrafluoroethylene excellent in breaking strength. The modified polytetrafluoroethylene comprises a polymer having units based on tetrafluoroethylene and a polymer having units based on a monomer represented by formula (1), wherein the content of the units based on a monomer represented by formula (1) is from 10 to 500 mass ppm, to all units in the modified polytetrafluoroethylene, and the standard specific gravity is from 2.155 to 2.175,

CH2═CR1-L-R2  Formula (1):

wherein R1 represents a hydrogen atom or an alkyl group, L represents a single bond, —CO—O—*, —O—CO—*, or —O—, * represents a bonding position to R2, and R2 represents a hydrogen atom, an alkyl group, or a nitrile group.

公开(公告)号：US11780943B2

公开(公告)日：2023-10-10

申请号：US17021129

申请日：2020-09-15

Applicant: AGC Inc.

Inventor： Shinya Higuchi ,  Shiro Ebata ,  Takehiro Kose

IPC: C08F214/26 ,  C08F2/10 ,  C08J3/16

CPC classification number: C08F214/265 ,  C08F2/10 ,  C08J3/16 ,  C08J2327/22

Abstract: To provide a method for producing modified polytetrafluoroethylene, in which formation of a fluorinated oligomer as a by-product is little. A method for producing modified polytetrafluoroethylene which contains substantially no C6-34 fluorinated oligomer containing hydrophilic functional groups and which contains substantially no fluorinated surfactant, the method comprising conducting copolymerization of tetrafluoroethylene and a monomer having a polar group, in a liquid dispersion 1 comprising a polymer containing units derived from a non-fluorinated monomer and an aqueous medium, or in a solution 2 obtainable by mixing at least one member selected from the group consisting of a polyalkylene oxide compound and a hydrocarbon-containing surfactant, with an oxidizing agent, in an aqueous medium, under such a condition that the amount of the monomer having a polar group to be used, is at most 0.150 mass % to the whole amount of tetrafluoroethylene, to obtain modified polytetrafluoroethylene.