公开(公告)号：US20250034386A1

公开(公告)日：2025-01-30

申请号：US18897316

申请日：2024-09-26

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Hirofumi MUKAE ,  Ayane NAKAUE ,  Yosuke KISHIKAWA ,  Taku YAMANAKA ,  Taketo KATO ,  Kenji ISHII

IPC: C08L27/18 ,  C08K3/04 ,  C08K3/08 ,  C08K3/38 ,  C08K7/14 ,  C08L27/22 ,  C09K5/14

Abstract: The disclosure aims to provide a fluororesin composition having excellent tensile properties and excellent handleability while containing a fluororesin having a history of being heated to a temperature equal to or higher than the melting point thereof and a molded article obtainable from the fluororesin composition. The disclosure relates to a non-melt-flowable fluororesin composition containing: a non-melt-flowable fluororesin A having a history of being heated to a temperature equal to or higher than a melting point thereof; a fluororesin B including at least one selected from the group consisting of a melt-flowable fluororesin and a non-melt-flowable fluororesin having no history of being heated to a temperature equal to or higher than a melting point thereof; and a filler.

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：US20220119556A1

公开(公告)日：2022-04-21

申请号：US17428677

申请日：2020-02-07

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Takahiro TAIRA ,  Chiaki OKUI ,  Hirotoshi YOSHIDA ,  Yuuji TANAKA ,  Taku YAMANAKA ,  Taketo KATO

IPC: C08F14/26 ,  C08K5/41

Abstract: A composition having a breaking strength of 10.0 N or more, containing a polytetrafluoroethylene, and substantially free from a compound represented by the following general formula (3): (H—(CF2)8—SO3)qM2  General Formula (3): wherein M2 is H, a metal atom, NR54, where each R5 may be the same or different and is H or an organic group having 1 to 10 carbon atoms, imidazolium optionally having a substituent, pyridinium optionally having a substituent, or phosphonium optionally having a substituent; and q is 1 or 2.

公开(公告)号：US20210332228A1

公开(公告)日：2021-10-28

申请号：US17337802

申请日：2021-06-03

Applicant: DAIKIN FLUOROCHEMICALS (CHINA) CO., LTD. ,  DAIKIN INDUSTRIES, LTD.

Inventor： Haijun YANG ,  Zhengmao QUAN ,  Shuji TAGASHIRA ,  Katsusada TOKUHIRA ,  Taku YAMANAKA

IPC: C08L27/18 ,  B29B7/00 ,  B29B7/28

Abstract: A method for producing a polytetrafluoroethylene composition including mixing a polytetrafluoroethylene resin and a filler using an airflow mixer to provide a polytetrafluoroethylene composition containing the polytetrafluoroethylene resin and the filler. The airflow mixer is a pulse-type airflow mixer or an airflow stirrer. Also disclosed is a polytetrafluoroethylene composition produced by the production method, a polytetrafluoroethylene composition having specific physical properties, as well as a molded article, electrically conductive tube, thermally conductive film, and substrate for CCL each obtained from the polytetrafluoroethylene composition.

公开(公告)号：US20210046209A1

公开(公告)日：2021-02-18

申请号：US16966941

申请日：2019-02-05

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Masayuki TSUJI ,  Taku YAMANAKA

IPC: A61L9/18 ,  C08J3/28

Abstract: The disclosure provides a method for removing a C4-C20 hydrophilic compound. The method for removing a hydrophilic compound includes step (a) of exposing a composition containing a C4-C20 hydrophilic compound to 0.1 to 500 kGy of radiation to remove the hydrophilic compound.

公开(公告)号：US20190040218A1

公开(公告)日：2019-02-07

申请号：US15757708

申请日：2016-08-30

Applicant: SUMITOMO ELECTRIC FINE POLYMER, INC. ,  DAIKIN INDUSTRIES, LTD.

Inventor： Kazuaki IKEDA ,  Hong-Phuc NGUYEN ,  Hirotoshi YOSHIDA ,  Taku YAMANAKA

IPC: C08J7/12 ,  C08F14/26 ,  B29C35/08 ,  B29C47/00 ,  B29C45/00

Abstract: A manufacturing method for a polytetrafluoroethylene formed product according to an aspect of the invention is a manufacturing method for a polytetrafluoroethylene formed product, the method including a step of irradiating a forming material containing a polytetrafluoroethylene as a principal component with ionizing radiation, wherein the polytetrafluoroethylene has a melt viscosity at 380° C. of not greater than 7×105 Pa·s.

公开(公告)号：US20190023856A1

公开(公告)日：2019-01-24

申请号：US16069735

申请日：2017-08-04

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Ken YOSHIDA ,  Hirotoshi YOSHIDA ,  Keisuke HAGI ,  Masayuki TSUJI ,  Taketo KATO ,  Yuuji TANAKA ,  Taku YAMANAKA ,  Kazuya KAWAHARA ,  Masamichi SUKEGAWA ,  Kazutaka HOSOKAWA

IPC: C08J3/12 ,  C08J3/28 ,  C08F8/50 ,  C08F14/26

Abstract: The invention provides a production method for producing low molecular weight polytetrafluoroethylene enabling easy removal of most of C8-C14 perfluorocarboxylic acids and salts thereof, which are unfortunately generated by irradiation, from the low molecular weight polytetrafluoroethylene. The method for producing low molecular weight polytetrafluoroethylene includes: (1) irradiating polytetrafluoroethylene to provide low molecular weight polytetrafluoroethylene having a melt viscosity of 1×102 to 7×105 Pa·s at 380° C.; (2) pulverizing the low molecular weight polytetrafluoroethylene; and (3) heating the low molecular weight polytetrafluoroethylene pulverized in the step (2).

公开(公告)号：US20190023818A1

公开(公告)日：2019-01-24

申请号：US16069052

申请日：2017-08-04

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Ken YOSHIDA ,  Hirotoshi YOSHIDA ,  Keisuke HAGI ,  Masayuki TSUJI ,  Taketo KATO ,  Yuuji TANAKA ,  Taku YAMANAKA ,  Kazuya KAWAHARA ,  Masamichi SUKEGAWA ,  Kazutaka HOSOKAWA

IPC: C08F8/50 ,  C08J3/28

Abstract: The invention provides a method for producing low molecular weight polytetrafluoroethylene less likely to generate C8-C14 perfluorocarboxylic acids and salts thereof. The method for producing low molecular weight polytetrafluoroethylene includes: (1) feeding into an airtight container: polytetrafluoroethylene; at least one additive selected from the group consisting of hydrocarbons, chlorinated hydrocarbons, alcohols, and carboxylic acids other than C8-C14 perfluorocarboxylic acids; and at least one selected from the group consisting of inert gases other than the above additive and oxygen adsorbents; and (2) irradiating the polytetrafluoroethylene to provide low molecular weight polytetrafluoroethylene having a complex viscosity of 1×102 to 7×105 Pa·s at 380° C.

公开(公告)号：US20180079927A1

公开(公告)日：2018-03-22

申请号：US15561368

申请日：2016-03-31

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Hiroyuki YOSHIMOTO ,  Taku YAMANAKA

IPC: C09D151/00 ,  C08L51/00 ,  H01B3/44 ,  H01B7/02 ,  H01B13/00 ,  H01B13/14

CPC classification number: C09D151/003 ,  C08L27/18 ,  C08L51/003 ,  C08L2203/202 ,  C08L2207/53 ,  H01B3/44 ,  H01B3/445 ,  H01B7/02 ,  H01B13/00 ,  H01B13/0016 ,  H01B13/145

Abstract: The invention provides a composition capable of providing an electric wire with small fluctuations in the wire diameter. The composition includes a modified polytetrafluoroethylene (A) having a cylinder extrusion pressure of 80 MPa or lower at a reduction ratio of 1600 and a non-fibrillatable low-molecular-weight polytetrafluoroethylene (B).

公开(公告)号：US20160289361A1

公开(公告)日：2016-10-06

申请号：US15038307

申请日：2014-12-01

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Taku YAMANAKA ,  Makoto ONO ,  Kohei YASUDA ,  Masahiko YAMADA ,  Shinichi CHAEN ,  Yasuhiko SAWADA ,  Takahiro TAIRA ,  Hirotoshi YOSHIDA ,  Taketo KATO

IPC: C08F214/26 ,  C08J5/18

CPC classification number: C08F214/262 ,  B29C55/04 ,  C08F2500/11 ,  C08F2500/24 ,  C08F2500/26 ,  C08F2800/10 ,  C08J5/18 ,  C08J2327/18

Abstract: The present invention aims to provide a modified polytetrafluoroethylene fine powder capable of providing a stretched body having high strength, a small pore size, and excellent homogeneity. The modified polytetrafluoroethylene fine powder of the present invention has non-melt-processability, has a standard specific gravity of 2.155 or lower, includes 0.015 mol % or more of a polymer unit derived from perfluoro(methyl vinyl ether) in all the monomer units, is obtained by emulsion polymerizing tetrafluoroethylene and at least the perfluoro(methyl vinyl ether) in the presence of a fluorosurfactant having a LogPOW value of 3.4 or lower, and has an extrusion pressure of 20.0 MPa or lower.

Abstract translation: 本发明的目的在于提供能够提供强度高，孔径小，均匀性优异的拉伸体的改性聚四氟乙烯细粉。 本发明的改性聚四氟乙烯微粉具有非熔融加工性，标准比重为2.155以下，在全部（单
体单元）中含有来自全氟（甲基乙烯基醚）的聚合物单元的0.015摩尔％以上， 通过在LogPOW值为3.4以下的含氟表面活性剂的存在下，将四氟乙烯和至少全氟（甲基乙烯基醚）进行乳液聚合而得到，挤出压力为20.0MPa以下。