公开(公告)号：US10787531B2

公开(公告)日：2020-09-29

申请号：US15880647

申请日：2018-01-26

Applicant: AGC Inc.

Inventor： Keisuke Yagi ,  Takehiro Kose ,  Hiroki Nagai ,  Satoko Yasuda

IPC: C08F2/38 ,  C08F2/26 ,  C08F210/06 ,  C08F214/26 ,  C08K3/04 ,  C08K5/14 ,  C08K13/02 ,  C08K5/3492 ,  C08K5/00

Abstract: To provide a fluorinated elastic copolymer capable of obtaining a crosslinked rubber which is excellent in tensile strength and has a low compression set under high temperature conditions; a method for producing such a fluorinated elastic copolymer; a crosslinked rubber; and a method for producing such a crosslinked rubber. A fluorinated elastic copolymer having structural units based, respectively, on monomers (a), (b) and (c), and further having iodine atoms. Monomer (a): at least one member selected from the group consisting of tetrafluoroethylene, hexafluoropropylene, vinylidene fluoride, chlorotrifluoroethylene and perfluoro(alkyl vinyl ether). Monomer (b): at least one member selected from the group consisting of compounds represented by formula (I): CR1R2═CR3—R4—CR5═CR6R7 (I) (wherein R1, R2, R3, R5, R6 and R7 are each independently a hydrogen atom, a fluorine atom or a methyl group; and R4 is a C1-10 perfluoroalkylene group which may have an etheric oxygen atom inserted between carbon atoms). Monomer (c): at least one member selected from the group consisting of ethylene and propylene.

公开(公告)号：US11421058B2

公开(公告)日：2022-08-23

申请号：US16684637

申请日：2019-11-15

Applicant: AGC Inc.

Inventor： Shinya Higuchi ,  Masahiro Takazawa ,  Takehiro Kose

IPC: C08F214/18 ,  H01B3/44 ,  C08F214/26 ,  H01B7/02

Abstract: A modified polytetrafluoroethylene which can be formed under a low extrusion pressure and with which changes of the extrusion pressure are suppressed, even in paste extrusion at a high RR ratio, and its production method. The modified polytetrafluoroethylene having units based on tetrafluoroethylene, 0.020 to 0.040 mass % of units based on a monomer represented by the following formula (1), and 0.003 to 0.080 mass % of units based on a monomer represented by the following formula (2), each based on all units of the modified polytetrafluoroethylene. The monomers of formulae (1) and (2) are represented by: CH2═CH—CnF2n+1 (1), wherein n is from 2 to 6; and CF2═CFO(LO)mRf (2), wherein L is a perfluoroalkylene group, Rf is a perfluoroalkyl group, and m is an integer of from 0 to 4.

公开(公告)号：US11117993B2

公开(公告)日：2021-09-14

申请号：US16699885

申请日：2019-12-02

Applicant: AGC Inc.

Inventor： Yukiko Hattori ,  Takehiro Kose

IPC: C08F214/26 ,  C08F2/22 ,  C08F6/16 ,  C08F6/22 ,  C08F214/22 ,  C08F236/20 ,  C08F236/22 ,  C08K5/00

Abstract: To provide a fluorinated elastic copolymer having a low content of metal elements and being excellent in crosslinkability. This fluorinated elastic copolymer has iodine atoms and has units a based on tetrafluoroethylene, units b based on a monomer having one polymerizable unsaturated bond (but excluding tetrafluoroethylene), and units c based on a fluorinated monomer having at least two polymerizable unsaturated bonds, wherein the metal content is at least 0.3 ppm by mass and at most 20.0 ppm by mass.

公开(公告)号：US20200095353A1

公开(公告)日：2020-03-26

申请号：US16684637

申请日：2019-11-15

Applicant: AGC Inc.

Inventor： Shinya Higuchi ,  Masahiro Takazawa ,  Takehiro Kose

IPC: C08F214/18 ,  H01B3/44 ,  H01B7/02

Abstract: To provide a modified PTFE which can be formed under a low extrusion pressure and with which changes of the extrusion pressure are suppressed, even in paste extrusion at a high RR ratio, and its production method.A modified polytetrafluoroethylene having units based on tetrafluoroethylene, units based on a monomer represented by the following formula (1) and units based on a monomer represented by the following formula (2),wherein the content of the units based on the monomer represented by the formula (1) is from 0.020 to 0.040 mass % to all units of the modified polytetrafluoroethylene, andthe content of the units based on the monomer represented by the formula (2) is from 0.003 to 0.080 mass % to all units of the modified polytetrafluoroethylene: CH2═CH—CnF2n+1  (1) wherein n is from 2 to 6; CF2═CFO(LO)mRf  (2) wherein L is a perfluoroalkylene group, Rf is a perfluoroalkyl group, and m is an integer of from 0 to 4.