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：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：US11034852B2

公开(公告)日：2021-06-15

申请号：US16002429

申请日：2018-06-07

Applicant: AGC Inc.

Inventor： Shun Saito ,  Shiro Ebata

IPC: C09D127/16 ,  C09D127/12 ,  C09D175/04 ,  C09D7/40 ,  C09D7/61 ,  C09D5/00 ,  B32B15/08 ,  B32B27/18 ,  B32B27/30 ,  C08G18/24 ,  C08G18/62 ,  C08G18/79 ,  C08G18/80 ,  B05D7/24 ,  B05D1/38 ,  B05D3/02 ,  B05D7/14 ,  B05D7/00 ,  C08F214/24 ,  C08K3/22

Abstract: To provide a coated body excellent in weather resistance and excellent also in pressure marking resistance. The coated body comprises a substrate, an undercoating film, a prescribed intermediate coating film and a top coating film formed by curing a top coating material comprising the following components (1) to (3), in this order: (1) a fluorinated polymer having hydroxy groups or carboxy groups; (2) a curing agent for curing the fluorinated polymer; and (3) a prescribed ultraviolet absorber.

公开(公告)号：US10472535B2

公开(公告)日：2019-11-12

申请号：US14674565

申请日：2015-03-31

Applicant: AGC Inc.

Inventor： Shiro Ebata ,  Toshinori Tomita ,  Masakazu Ataku ,  Shun Saito ,  Sho Masuda

IPC: C09D127/12 ,  C08F214/18 ,  C08F2/38 ,  C08K5/3435

Abstract: A method for producing a fluorinated copolymer solution polymerizing a monomer mixture of a fluoro-olefin (A), a monomer (B) having a crosslinkable group and a monomer (C) having no fluorine atom and no crosslinkable group in the presence of an organic solvent and a compound having two or more piperidyl group represented by the formula (1):

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.