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.

公开(公告)号：US20210108008A1

公开(公告)日：2021-04-15

申请号：US16499047

申请日：2018-03-30

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 ,  C08K5/42 ,  C08K5/098

Abstract: A method for producing a fluoropolymer of the invention which includes polymerizing a fluoromonomer in an aqueous medium in the presence of a surfactant to provide a fluoropolymer. The surfactant includes at least one selected from the group consisting of a surfactant represented by R1a—CO—R2a—CO—R3a-Aa and a surfactant represented by R1b—CO—(CR2b2)n—(OR3b)p—(CR4b2)q-L-Ab.

公开(公告)号：US20250043042A1

公开(公告)日：2025-02-06

申请号：US18926639

申请日：2024-10-25

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Kengo ITO ,  Chiaki Okui ,  Kenji Ichikawa ,  Taketo Kato

IPC: C08F14/26

Abstract: Provided is a method for producing a composition containing a fluororesin, the method comprising polymerizing tetrafluoroethylene 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) to obtain a polymerization dispersion containing a fluororesin containing a tetrafluoroethylene unit, coagulating the fluororesin in the polymerization dispersion to obtain a coagulate, and washing the coagulate to obtain a composition containing the fluororesin, wherein (1) the coagulation is carried out by bringing the fluororesin in the polymerization dispersion into contact with an organic solvent, and/or (2) the washing is carried out by bringing the coagulate into contact with an organic solvent, CX1X3═CX2R(—CZ1Z2-A0)m  (I) wherein the definitions of the reference signs in the formula are as provided in the specification.

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：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：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：US20230101829A1

公开(公告)日：2023-03-30

申请号：US17974402

申请日：2022-10-26

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

Abstract: A composition including a fluoropolymer and substantially free from a compound represented by the following formula (3): (H—(CF2)8—SO3)qM2, wherein M2 is H, a metal atom, NR54, imidazolium optionally containing a substituent, pyridinium optionally containing a substituent, or phosphonium optionally containing a substituent; R5s are each H or an organic group and are the same as or different from each other; and q is 1 or 2.

公开(公告)号：US20220010118A1

公开(公告)日：2022-01-13

申请号：US17294871

申请日：2019-11-19

Applicant: DAIKIN INDUSTRIES, LTD.

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

IPC: C08L27/18

Abstract: A composition including a polytetrafluoroethylene and a polymer (I) containing a polymerization unit (I) based on a monomer represented by the following general formula (I), the composition having a standard specific gravity of 2.200 or less: CX1X3═CX2R(—CZ1Z2-A0)m   (I) wherein X1 and X3 are each independently F, Cl, H, or CF3; A0 is an anionic group; X2 is H, F, an alkyl group, or a fluorine-containing alkyl 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：US20210032381A1

公开(公告)日：2021-02-04

申请号：US16967965

申请日：2019-02-07

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: C08F14/26 ,  C08F2/26

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 R5 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 and a composition including a fluoropolymer and the surfactant.

公开(公告)号：US20190016848A1

公开(公告)日：2019-01-17

申请号：US16083261

申请日：2017-03-09

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Hideto NAKAGAWA ,  Kengo ITO ,  Kenji GOBOU ,  Koichiro OGITA ,  Katsuhiko IMOTO

IPC: C08G18/62 ,  C08F214/26 ,  C08G18/10 ,  H01L31/049

Abstract: Provided is a polymer capable of providing a coating film that has good initial adhesiveness to a base material and good adhesiveness thereto after a pressure cooker test, and has excellent abrasion resistance as determined by a falling sand abrasion test. The polymer includes a perhaloolefin unit, a vinyl ester unit that contains neither a hydroxy group nor an aromatic ring; and a hydroxy group-containing monomer unit. The polymer has a hydroxyl value of 110 mgKOH/g or greater.