公开(公告)号：US20220282008A1

公开(公告)日：2022-09-08

申请号：US17747685

申请日：2022-05-18

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Yoshinori NANBA ,  Taketo KATO ,  Kenji ICHIKAWA ,  Soushi TSUCHIYA ,  Souta YUASA ,  Yosuke KISHIKAWA ,  Masahiro HIGASHI ,  Masaki IRIE ,  Taku YAMANAKA

IPC: C08F14/26 ,  C08F2/10

Abstract: The present disclosure provides a method for producing a fluoropolymer, the method includes polymerizing a fluoromonomer in an aqueous medium in the presence of a polymer (1) to obtain a fluoropolymer, wherein the polymer (1) is a polymer of a monomer (1) represented by the general formula (1) below, in which the content of a dimer and a trimer of the monomer (1) is 1.0% by mass or less based on the polymer (1): CF2═CF—R—CZ1Z1-A0   (1) wherein R is a linking group; Z1 and Z2 are each independently F or CF3; and A0 is an anionic group.

公开(公告)号：US20240317907A1

公开(公告)日：2024-09-26

申请号：US18655177

申请日：2024-05-03

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Taketo KATO ,  Satoru YONEDA ,  Manabu FUJISAWA ,  Kazuya ASANO ,  Takahiro KITAHARA ,  Masahiro HIGASHI ,  Akiyoshi YAMAUCHI ,  Sumi ISHIHARA ,  Yosuke KISHIKAWA ,  Shinnosuke NITTA ,  Marina NAKANO ,  Hirotoshi YOSHIDA ,  Yoshinori NANBA ,  Kengo ITO ,  Chiaki OKUI ,  Hirokazu AOYAMA ,  Masamichi SUKEGAWA ,  Taku YAMANAKA ,  Yuuji TANAKA ,  Kenji ICHIKAWA ,  Yohei FUJIMOTO ,  Hiroyuki SATO

IPC: C08F14/26 ,  C08K5/098 ,  C08K5/42

CPC classification number: C08F14/26 ,  C08K5/098 ,  C08K5/42 ,  C08K2201/014 ,  C08K2201/019

Abstract: Composition including (a) a fluoropolymer; and (b1) at least one of a compound represented by the formula (4) ((H—(CF2)7—COO)pM1) or the formula (4′) ((H—(CF2)8—COO)pM1) of the present disclosure, both respectively in an amount of 100 ppb or less relative to the fluoropolymer, or (b2) at least one of a compound represented by the formula (5) ((H—(CF2)13—COO)pM1) or the formula (5′) ((H—(CF2)14—COO)pM1) of the present disclose, both respectively in an amount of 100 ppb or less relative to the fluoropolymer.

公开(公告)号：US20240141155A1

公开(公告)日：2024-05-02

申请号：US18396125

申请日：2023-12-26

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Yoshinori NANBA ,  Kenji ICHIKAWA ,  Taketo KATO ,  Taku YAMANAKA

IPC: C08L27/18 ,  C08F114/26

CPC classification number: C08L27/18 ,  C08F114/26 ,  C08L2201/00 ,  C08L2203/30

Abstract: Provided is a method for producing a fluoropolymer composition, comprising bringing a fluoropolymer raw material into contact with an oxidizing agent, wherein the fluoropolymer raw material is obtained by polymerizing a fluoromonomer in an aqueous medium in the presence of a polymer (I) containing a polymerization unit (I) derived from a monomer (I) represented by the general formula (I).


CX1X3═CX2R(—CZ1Z2-A0)m  (I)

wherein X1 and X3 are each independently F, Cl, H, or CF3; X2 is H, F, an alkyl group, or a fluorine-containing alkyl group; A0 is an anionic group; R is a linking group; Z1 and Z2 are each independently H, F, an alkyl group, or a fluorine-containing alkyl group; and m is an integer of 1 or more.

公开(公告)号：US20230220129A1

公开(公告)日：2023-07-13

申请号：US18119371

申请日：2023-03-09

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Taketo KATO ,  Satoru YONEDA ,  Masahiro HIGASHI ,  Akiyoshi YAMAUCHI ,  Sumi ISHIHARA ,  Yosuke KISHIKAWA ,  Moe HOSOKAWA ,  Marina NAKANO ,  Hirotoshi YOSHIDA ,  Yoshinori NANBA ,  Kengo ITO ,  Chiaki OKUI ,  Kenji ICHIKAWA ,  Yohei FUJIMOTO ,  Hirokazu AOYAMA ,  Masamichi SUKEGAWA ,  Taku YAMANAKA ,  Hiroyuki SATO

IPC: C08L27/18 ,  C08F2/28 ,  C08F114/26 ,  C08K5/19

CPC classification number: C08L27/18 ,  C08F2/28 ,  C08F114/26 ,  C08K5/19

Abstract: A method for producing a fluoropolymer which includes polymerizing a fluoromonomer in an aqueous medium in the presence of a surfactant to provide a fluoropolymer, the surfactant being represented by the general formula (1): CR1R2R4—CR3R5—X-A, wherein R1 to R5 are each H or a monovalent substituent, with the proviso that at least one of R1 and R3 represents a group represented by the general formula: —Y—R6 and at least one of R2 and R3 represents a group represented by the general formula: —X-A or a group represented by the general formula: —Y—R6; and A is the same or different at each occurrence and is —COOM, —SO3M, or —OSO3M. Also disclosed is a surfactant for polymerization represented by the general formula (1), a method for producing a fluoropolymer using the surfactant, a composition including a fluoropolymer and the surfactant and a molded body including the composition.

公开(公告)号：US20220315713A1

公开(公告)日：2022-10-06

申请号：US17602448

申请日：2020-04-16

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Chiaki OKUI ,  Hirotoshi YOSHIDA ,  Hiroyuki SATO ,  Kenji ICHIKAWA ,  Taketo KATO ,  Taku YAMANAKA

IPC: C08J3/12 ,  C08F2/10 ,  C08F14/26

Abstract: A method for producing a fluoropolymer powder including (A1) adding, to a fluoropolymer aqueous dispersion obtained by polymerization using a carboxylic acid type hydrocarbon surfactant, and an acid to adjust a pH to 4.0 or less and cause coagulation to thereby obtain a wet fluoropolymer powder containing a fluorine-containing compound represented by the following general formula (1A), and (B1) heat-treating the wet fluoropolymer powder at a temperature higher than 150° C. and lower than 240° C.: General Formula (1A): H—(CF2)m—COOH wherein m is 3 to 19.

公开(公告)号：US20220289877A1

公开(公告)日：2022-09-15

申请号：US17747655

申请日：2022-05-18

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Yohei FUJIMOTO ,  Kenji ICHIKAWA ,  Yoshinori NANBA ,  Taketo KATO ,  Taku YAMANAKA

IPC: C08F14/26

Abstract: Provided is a method for producing polytetrafluoroethylene, which includes polymerizing tetrafluoroethylene in an aqueous medium in the presence of a nucleating agent and a polymer (I) containing a polymerization unit (I) based on a monomer represented by the general formula (I) to obtain polytetrafluoroethylene: CX1X3═CX2R(—CZ1Z2-A0)m  (I) wherein X1 and X3 are each independently F, Cl, H, or CF3; X2 is H, F, an alkyl group, or a fluorine-containing alkyl group; A0 is an anionic group; R is a linking group; Z1 and Z2 are each independently H, F, an alkyl group, or a fluorine-containing alkyl group; and m is an integer of 1 or more.

公开(公告)号：US20220282007A1

公开(公告)日：2022-09-08

申请号：US17747547

申请日：2022-05-18

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Taku YAMANAKA ,  Masahiro HIGASHI ,  Taketo KATO ,  Kenji ICHIKAWA ,  Yohei FUJIMOTO ,  Masaki IRIE ,  Soushi TSUCHIYA ,  Souta YUASA

IPC: C08F14/26

Abstract: A method for producing a fluoropolymer, which includes: polymerizing a monomer (I) represented by the general formula (I) below in an aqueous medium substantially in the absence of a fluorine-containing surfactant (except for the monomer (I) represented by the general formula (I)) to obtain a crude composition containing a polymer of the monomer (I); removing a dimer and a trimer of the monomer (I) contained in the crude composition from the crude composition to obtain a polymer (I) in which the content of the dimer and trimer of the monomer (I) is 1.0% by mass or less based on the polymer (I); and polymerizing a fluoromonomer in an aqueous medium in the presence of the polymer (I) to obtain a fluoropolymer: CX1X3═CX2R(—CZ1Z2-A0)m  (I) wherein X1 and X3, X2, A0, R, Z1 and Z2 are as defined herein.

公开(公告)号：US20210340290A1

公开(公告)日：2021-11-04

申请号：US17280554

申请日：2019-10-03

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Taketo KATO ,  Yohei FUJIMOTO ,  Kenji ICHIKAWA ,  Hiroyuki SATO ,  Yoshinori NANBA ,  Hirotoshi YOSHIDA ,  Kengo ITO ,  Chiaki OKUI ,  Masamichi SUKEGAWA ,  Taku YAMANAKA

IPC: C08F14/26

Abstract: A method for producing polytetrafluoroethylene which include polymerizing tetrafluoroethylene and a modifying monomer in an aqueous medium in the presence of a hydrocarbon surfactant to obtain polytetrafluoroethylene. An amount of the hydrocarbon surfactant at the initiation of polymerization is more than 50 ppm based on the aqueous medium. Further, the polytetrafluoroethylene contains 99.0% by mass or more of a polymerization unit based on tetrafluoroethylene and 1.0% by mass or less of a polymerization unit based on the modifying monomer.

公开(公告)号：US20240117087A1

公开(公告)日：2024-04-11

申请号：US18512794

申请日：2023-11-17

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Yoshinori NANBA ,  Rina TAMAI ,  Takuma IWASAKA ,  Soushi TSUCHIYA ,  Kenji ICHIKAWA ,  Taketo KATO ,  Masaki IRIE ,  Taku YAMANAKA

IPC: C08F214/26 ,  C08F2/16

CPC classification number: C08F214/265 ,  C08F2/16

Abstract: A method for producing a fluoropolymer which method includes polymerizing a perfluoromonomer in an aqueous medium in the presence of a polymer (1) to obtain a fluoropolymer, wherein the content of a polymerized unit derived from the perfluoromonomer in the fluoropolymer is 90 mol % or more based on all polymerized units of the fluoropolymer, the polymer (1) is a polymer of a monomer (1) represented by the general formula (1): CF2═CF—O—R-(Rf-SO3M)m, a polymerized unit (1) derived from the monomer (1) in the polymer (1) is 50% by mass or more based on all polymerized units of the polymer (1), and the content of a dimer and a trimer of the monomer (1) in the polymer (1) is 1.0% by mass or less based on the polymer (1).

公开(公告)号：US20220119561A1

公开(公告)日：2022-04-21

申请号：US17424715

申请日：2020-01-31

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Taketo KATO ,  Yohei FUJIMOTO ,  Kenji ICHIKAWA ,  Hiroyuki SATO ,  Yoshinori NANBA ,  Hirotoshi YOSHIDA ,  Kengo ITO ,  Taku YAMANAKA

IPC: C08F114/26

Abstract: A method for producing polytetrafluoroethylene includes a step of polymerizing tetrafluoroethylene in an aqueous medium in the presence of a hydrocarbon surfactant and a polymerization initiator to obtain polytetrafluoroethylene and a step of adding at least one selected from the group consisting of a radical scavenger and a decomposer of a polymerization initiator after the initiation of polymerization.