Daikin Industries, Ltd.

Manabu Fujisawa

Takahiro Kitahara

Mitsuru Kishine

Yosuke Kishikawa

Akiyoshi Yamauchi

Sumi Ishihara

Masahiro Higashi

Satoru Yoneda

Masamichi Sukegawa

Kenji Ichikawa

Hirokazu Aoyama

Yuuji Tanaka

Taku Yamanaka

Taketo Kato

Hirotoshi Yoshida

Yoshinori Nanba

Tatsuya Morikawa

Hiroyuki Sato

Kengo Ito

Yuuki Kuwajima

Hitoshi Imamura

Masaki Irie

Eri Mukai

Hiroyuki Hamada

Shigeru Morita

Yutaka Ueta

Masanori Kitaichi

Takashi Sekiguchi

Yasukazu Nakatani

Shoji Fukuoka

Kazuya Asano

Yohei Fujimoto

Chiaki Okui

Marina Nakano

Takashi Iguchi

Shinnosuke Nitta

Chihiro Shinoda

Yousuke Nishimura

Satoshi Tokuno

Sadashige Irie

Kazuhiro Yamamura

Etsuo Minamino

Kazuki Hosoda

Takuji Ishikawa

Takeshi Shimono

Toshio Miyatani

Shigehito Sagisaka

Tatsuya Funaoka

Hiroshi Torii

Yosuke Nishimura

Ryouichi Fukagawa

Takayuki Hirao

Yoshiki Tanaka

Yasuyuki Yamaguchi

Toshiki Ichisaka

Kazunobu Uchida

Ryouichi Yano

Tomoyuki Fukatani

Shintarou Ogata

Natsumi Okamoto

Takeshi Kozuki

Hiroaki Wada

Tomoyuki Goto

Provided is a tube comprising a tetrafluoroethylene/fluoroalkyl vinyl ether copolymer, wherein the tube inner surface has a surface roughness Ra of 5 nm or less measured by atomic force microscopy (AFM) with an evaluation length set to 3 μm, and the tube has an amount of metals eluted from the tube inner surface of 0.30 ng/cmor less.

Tube, method for producing tube, and method for storing tube

Provided is a copolymer consisting essentially of ethylene units, tetrafluoroethylene units, and hexafluoropropylene units, wherein a molar ratio (Et units/TFE units) of the ethylene (Et) units to the tetrafluoroethylene (TFE) units is 52.0/48.0 to 56.0/44.0, and a content of the hexafluoropropylene units is 19.0 to 21.0 mol % based on the total monomer units constituting the copolymer.

Copolymer

A magnet wire including a conductor and an insulating coating formed on an outer periphery of the conductor. The insulating coating contains a copolymer containing a tetrafluoroethylene unit and a fluoroalkyl vinyl ether unit. The copolymer has a melt flow rate of 10 to 60 g/10 min, and the copolymer has a fluoroalkyl vinyl ether unit content of 6.2 to 8.0% by mass based on a total content of monomer units.

Magnet wire and coil

A surfactant for polymerization including at least one selected from a surfactant represented by R—CO—R—CO—R—OSOXand a surfactant represented by R—CO—(CR)—(OR)—(CR)-L-OSOX, wherein R, R, R, X, R, R, R, R, L and Xare as defined herein. Also disclosed is a composition containing a fluoropolymer and the at least one surfactant, a composition containing a fluoropolymer and a compound represented by (H—(CF)—SO)M, where Mis as defined herein, and a molded article made from the composition containing a fluoropolymer and the compound represented by (H—(CF)—SO)M.

Production method for fluoropolymer, surfactant for polymerization, and use of surfactant

The present disclosure provides a welded body having a connecting structure formed by welding a first molded body and a second molded body, wherein the first and second molded bodies contain at least one copolymer selected from the group consisting of a tetrafluoroethylene/fluoro (alkyl vinyl ether) copolymer and a tetrafluoroethylene/hexafluoropropylene copolymer, and wherein the connecting structure has a liquid contact surface to be in contact with a liquid having a solubility parameter of 14 to 35 (MPa), a welded part formed in the connecting structure is not exposed to the liquid contact surface, and the number of particles of 30 nm or larger to be eluted from the liquid contact surface in the connecting structure is 1,000 particles/ml or less.

Welded body

A composition including a fluoropolymer and substantially free from a compound represented by the following formula (3): (H—(CF)—SO)M, wherein Mis H, a metal atom, NR, imidazolium optionally containing a substituent, pyridinium optionally containing a substituent, or phosphonium optionally containing a substituent; Rs are each H or an organic group and are the same as or different from each other; and q is 1 or 2.

A binder for a secondary battery containing a fluorine-containing polymer (A) and polyvinylidene fluoride (B). The fluorine-containing polymer (A) contains a polymerized unit based on vinylidene fluoride, a polymerized unit based on tetrafluoroethylene, and a polymerized unit based on a monomer (2-2) represented by the following formula (2-2): wherein R, R, and Rare each independently a hydrogen atom or a C1-C8 hydrocarbon group; Ris a C1-C8 hydrocarbon group; and Yis an inorganic cation or an organic cation. Also disclosed is an electrode mixture and an electrode for a secondary battery including the binder, and a secondary battery including the electrode.

Binder for secondary battery, electrode mixture for secondary battery, electrode for secondary battery and secondary battery

A sulfuric acid ester containing a plurality of carbonyl groups or a salt thereof, and a surfactant. The sulfuric acid ester is a compound represented by the following formula:R&#x2014;C(&#x2550;O)&#x2014;R&#x2014;C(&#x2550;O)&#x2014;R&#x2014;OSOXwherein R, Rand Rare defined herein; X is H, a metal atom, NR, imidazolium optionally containing a substituent, pyridinium optionally containing a substituent, or phosphonium optionally containing a substituent, where Rs are each H or an organic group and are the same as or different from each other; and any two of R, R, and Roptionally bind to each other to form a ring. Also disclosed is a surfactant containing the sulfuric acid ester and an aqueous dispersant containing the sulfuric acid ester.

Sulfuric acid ester or salt thereof, and surfactant

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 R&#x2014;CO&#x2014;R&#x2014;CO&#x2014;R-Aand a surfactant represented by R&#x2014;CO&#x2014;(CR)&#x2014;(OR)&#x2014;(CR)-L-A.

A secondary battery separator including a porous substrate and a porous film firmly bonded to each other, the porous film being disposed on or above the porous substrate. The porous film contains a fluorine-containing polymer that contains a polymerized unit based on vinylidene fluoride, a polymerized unit based on tetrafluoroethylene, and a polymerized unit based on a monomer represented by the following formula (2-2):RRC&#x2550;CRRCOY&#x2003;&#x2003;(2-2)wherein R, R, and Rare each independently a hydrogen atom or a C1-C8 hydrocarbon group; Ris a C1-C8 hydrocarbon group; and Yis an inorganic cation and/or an organic cation. Also disclosed is a secondary battery including the secondary battery separator; a positive electrode; a negative electrode; and a non-aqueous electrolyte solution.

Secondary battery separator including porous film having fluorine-containing polymer of vinylidene fluoride, tetrafluoroethylene, and vinyl carboxylic acid or salt and secondary battery including the same

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 includes at least one selected from the group consisting of a surfactant represented by R&#x2014;CO&#x2014;R&#x2014;CO&#x2014;R&#x2014;OSOXand a surfactant represented by R&#x2014;CO&#x2014;(CR)&#x2014;(OR)&#x2014;(CR)-L-OSOX.

A sulfuric acid ester containing a plurality of carbonyl groups or a salt thereof, and a surfactant. The sulfuric acid ester is a compound represented by the following formula:R&#x2014;C(&#x2550;O)&#x2014;R&#x2014;C(&#x2550;O)&#x2014;R&#x2014;OSOX

A binder and an electrode mixture for a secondary battery. The binder contains a fluorine-containing polymer containing a polymerized unit based on vinylidene fluoride, a polymerized unit based on tetrafluoroethylene, and a polymerized unit based on a monomer (2-2) represented by the following formula (2-2):RRC&#x2550;CRRCOY&#x2003;&#x2003;(2-2)wherein R, R, and Rare each independently a hydrogen atom or a C1-C8 hydrocarbon group; Ris a C1-C8 hydrocarbon group; and Yis an inorganic cation and/or an organic cation.

Binder for secondary batteries and electrode mixture for secondary batteries

The present invention provides a composition including a fluorine-containing polymer, and excellent in heat resistance even if only a small amount of additives is added to the composition. The present invention relates to a composition, comprising: a fluorine-containing polymer (a) and a cobalt compound (b).

Composition and method for producing the same, and powder coating material, pellet, resin formed article, and electric wire

The present invention aims to provide a method of producing a fluoropolymer, especially a fluoropolymer essentially including a tetrafluoroethylene or chlorotrifluoroethylene unit, at a higher polymerization rate with improved efficiency, the method being capable of improving the moldability in extrusion molding and suppressing discoloration. The method of producing a fluoropolymer of the present invention includes producing a fluoropolymer by polymerizing tetrafluoroethylene or chlorotrifluoroethylene in the presence of a peroxydicarbonate. The peroxydicarbonate is represented by the formula:R&#x2014;O&#x2014;C(&#x2550;O)&#x2014;O&#x2014;O&#x2014;C(&#x2550;O)&#x2014;O&#x2014;Rwherein R's may be the same as or different from each other and individually represent a C4 alkyl group or alkoxy alkyl group.

Fluoropolymer production method

Growing community of inventors

Settsu, Japan

Manabu Fujisawa