Daikin Industries, Ltd.

Nissin Chemical Industry Co., Ltd.

Daiken Industries, Ltd.

Masamichi Sukegawa

Taku Yamanaka

Taketo Kato

Hirotoshi Yoshida

Yuuji Tanaka

Yoshinori Nanba

Kenji Ichikawa

Hiroyuki Sato

Kengo Ito

Yohei Fujimoto

Chiaki Okui

Hirokazu Aoyama

Yosuke Kishikawa

Masayuki Tsuji

Sumi Ishihara

Masahiro Higashi

Michio Asano

Satoru Yoneda

Akiyoshi Yamauchi

Manabu Fujisawa

Kazutaka Hosokawa

Kazuya Kawahara

Keisuke Hagi

Ken Yoshida

Marina Nakano

Takahiro Kitahara

Hirokazu Yukawa

Kazuya Asano

Shinnosuke Nitta

Takahisa Aoyama

Tetsuo Shimizu

Shoji Kawachi

Hitoshi Imamura

Takahiro Taira

Tomihiko Yanagiguchi

Shingo Tanigawa

Yasuhiko Sawada

Hideki Kono

Yuuki Kuwajima

Hiroyuki Yoshimoto

Hayato Tsuda

Moe Hosokawa

Kazuhiro Yamamura

Yuji Gama

Yasuyuki Yamaguchi

Kyouhei Sawaki

Jihong Liu

Shinichi Yano

Katsuhide Ohtani

Takeshi Fukuzumi

Shoichi Arima

Takeshi Kozuki

Hiroaki Wada

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 method for producing a fluoropolymer, which includes polymerizing a fluoromonomer in an aqueous medium in the presence of a polymer (1), the polymer (1) including a polymerized unit derived from a monomer CX═CY(—CZ—O—Rf-A), wherein X is the same or different and is —H or —F; Y is —H, —F, an alkyl group, or a fluorine-containing alkyl group; Z is the same or different and is —H, —F, an alkyl group, or a fluoroalkyl group; Rf is a C1-C40 fluorine-containing alkylene group or a C2-C100 fluorine-containing alkylene group and having an ether bond; and A is —COOM, —SOM, or —OSOM, wherein M is —H, a metal atom, —NR, imidazolium optionally having a substituent, pyridinium optionally having a substituent, or phosphonium optionally having a substituent, wherein R' is H or an organic group, providing that at least one of X, Y, and Z contains a fluorine atom.

Method for manufacturing fluoropolymer

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

A sealing structure for a battery includes a plate shaped member having a through hole, a polymer molding, and an electrode. The polymer molding has a tube portion provided along an entire edge of the through hole and a base portion provided on the tube portion. The electrode has a column portion disposed on an inner periphery of the tube portion and a plate portion provided on the column portion. A back surface of the plate shaped member contacts a front surface of the base portion. A front surface of the plate portion contacts a back surface of the base portion. The back surface of the plate shaped member has an annular first projection provided around the through hole and projecting toward the base portion. The front surface of the plate portion has an annular second projection provided around the through hole and projecting toward the base portion.

Sealing structure for battery

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.

Powder including low molecular weight polytetrafluoroethylene having a melt viscosity of 1×10to 7×10Pa·s at 380° C., having a melt viscosity of 1×10to 7×10Pa·s at 380° C., having an average particle size of 1.0 to 50 μm, and containing 30 or more carboxyl groups at ends of the molecule chain per 10carbon atoms in the main chain, wherein the powder is substantially free from C8-C14 perfluorocarboxylic acids and salts thereof.

Method for producing low molecular weight polytetrafluoroethylene, low molecular weight polytetrafluoroethylene, and powder

A method for producing polytetrafluoroethylene, which includes polymerizing tetrafluoroethylene in an aqueous medium in the presence of a nucleating agent and a hydrocarbon anionic surfactant to obtain polytetrafluoroethylene. A total amount of the nucleating agent and the hydrocarbon anionic surfactant at the initiation of polymerization is more than 50 ppm based on the aqueous medium.

Polytetrafluoroethylene production method

A core-shell particle including a core containing a perfluoropolymer and a shell containing a non-fluorine resin, the core having a periphery coated with the non-fluorine resin at a coverage of 90% or more, the perfluoropolymer being a polymer containing a polymerized unit based on a perfluoro monomer in an amount of 90 mol % or more relative to all polymerized units, and the shell having a mass of 50 or less relative to a total mass of the core and the shell of 80. Also disclosed is a method for producing the core-shell particle.

Core-shell type particle, dispersion and powder

Powder including low molecular weight polytetrafluoroethylene having a melt viscosity of 1&#xd7;10to 7&#xd7;10Pa&#xb7;s at 380&#xb0; C., having a melt viscosity of 1&#xd7;10to 7&#xd7;10Pa&#xb7;s at 380&#xb0; C., having an average particle size of 1.0 to 50 &#x3bc;m, and containing 30 or more carboxyl groups at ends of the molecule chain per 10carbon atoms in the main chain, wherein the powder is substantially free from C8-C14 perfluorocarboxylic acids and salts thereof.

A method for producing a fluoropolymer, which includes polymerizing a fluoromonomer in an aqueous medium in the presence of a polymer (1), the polymer (1) including a polymerized unit derived from a monomer CX&#x2550;CY(&#x2014;CZ&#x2014;O&#x2014;Rf-A), wherein X is the same or different and is &#x2014;H or &#x2014;F; Y is &#x2014;H, &#x2014;F, an alkyl group, or a fluorine-containing alkyl group; Z is the same or different and is &#x2014;H, &#x2014;F, an alkyl group, or a fluoroalkyl group; Rf is a C1-C40 fluorine-containing alkylene group or a C&#x2014;C100 fluorine-containing alkylene group and having an ether bond; and A is &#x2014;COOM, &#x2014;SOM, or &#x2014;OSOM, wherein M is &#x2014;H, a metal atom, &#x2014;NR, imidazolium optionally having a substituent, pyridinium optionally having a substituent, or phosphonium optionally having a substituent, wherein Ris H or an organic group, providing that at least one of X, Y, and Z contains a fluorine atom.

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): CRRR&#x2014;CRR&#x2014;X-A, wherein Rto Rare each H or a monovalent substituent, with the proviso that at least one of Rand Rrepresents a group represented by the general formula: &#x2014;Y&#x2014;Rand at least one of Rand Rrepresents a group represented by the general formula: &#x2014;X-A or a group represented by the general formula: &#x2014;Y&#x2014;R; and A is the same or different at each occurrence and is &#x2014;COOM, &#x2014;SOM, or &#x2014;OSOM. 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.

Method for manufacturing fluoropolymer, surfactant for polymerization, use for surfactant, and composition

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 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.

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&#xd7;10to 7&#xd7;10Pa&#xb7;s at 380&#xb0; C.; (2) pulverizing the low molecular weight polytetrafluoroethylene; and (3) heating the low molecular weight polytetrafluoroethylene pulverized in the step (2).

Low molecular weight polytetrafluoroethylene powder having a complex viscosity of 1&#xd7;10to 7&#xd7;10Pa&#xb7;s at 380&#xb0; C., containing 5 or less carboxyl groups at ends of the molecule chain per 10carbon atoms in the main chain, and being substantially free from C8-C14 perfluorocarboxylic acids and salts thereof. Also disclosed is a method for producing low molecular weight polytetrafluoroethylene.

Growing community of inventors

Osaka, Japan

Masamichi Sukegawa