公开(公告)号：US20200056031A1

公开(公告)日：2020-02-20

申请号：US16661064

申请日：2019-10-23

Applicant: AGC INC. ,  AGC Chemicals Europe, Limited

Inventor： Shigeki KOBAYASHI ,  Masahiro Takazawa ,  Ariana Claudia Morgovan-Ene ,  Anthony Eugene Wade ,  Diane Caine

IPC: C08L27/18 ,  C08F214/26 ,  C08J5/18 ,  C08J5/24 ,  C09D127/18 ,  C09D7/20 ,  C09D7/45

Abstract: To provide a PTFE aqueous dispersion which is excellent in mechanical stability, while being not susceptible to foaming. A polytetrafluoroethylene aqueous dispersion which is characterized by containing from 15 to 70 mass % of PTFE particles having an average primary particle diameter of from 0.1 to 0.5 μm; from 0.1 to 20,000 ppm, to the PTFE particles, of a fluorinated emulsifier selected from a C4-7 fluorinated carboxylic acid which may have an etheric oxygen atom, and salts of thereof; from 1 to 20 parts by mass, to 100 parts by mass of the PTFE particles, of a nonionic surfactant represented by R1—O-A-H (wherein R1 is a C8-18 alkyl group, and A is a polyoxyalkylene chain); from 0.004 to 0.040 parts by mass, to 100 parts by mass of the PTFE particles, of a polyether polysiloxane copolymer, wherein the polyether chain consists solely of a polyoxypropylene group; and water.

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：US11104787B2

公开(公告)日：2021-08-31

申请号：US16661064

申请日：2019-10-23

Applicant: AGC INC. ,  AGC Chemicals Europe, Limited

Inventor： Shigeki Kobayashi ,  Masahiro Takazawa ,  Ariana Claudia Morgovan-Ene ,  Anthony Eugene Wade ,  Diane Caine

IPC: C08L27/18 ,  C09D7/20 ,  C09D7/45 ,  C08F214/26 ,  C08J5/18 ,  C08J5/24 ,  C09D127/18

Abstract: To provide a PTFE aqueous dispersion which is excellent in mechanical stability, while being not susceptible to foaming. A polytetrafluoroethylene aqueous dispersion which is characterized by containing from 15 to 70 mass % of PTFE particles having an average primary particle diameter of from 0.1 to 0.5 μm; from 0.1 to 20,000 ppm, to the PTFE particles, of a fluorinated emulsifier selected from a C4-7 fluorinated carboxylic acid which may have an etheric oxygen atom, and salts of thereof; from 1 to 20 parts by mass, to 100 parts by mass of the PTFE particles, of a nonionic surfactant represented by R1—O-A-H (wherein R1 is a C8-18 alkyl group, and A is a polyoxyalkylene chain); from 0.004 to 0.040 parts by mass, to 100 parts by mass of the PTFE particles, of a polyether polysiloxane copolymer, wherein the polyether chain consists solely of a polyoxypropylene group; and water.

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.