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：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.

公开(公告)号：US11306167B2

公开(公告)日：2022-04-19

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: C08F214/26 ,  C08F214/22 ,  C08F214/28 ,  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.