Daikin Industries, Ltd.

Yoshinori Nanba

Taku Yamanaka

Taketo Kato

Hirotoshi Yoshida

Kenji Ichikawa

Yohei Fujimoto

Hiroyuki Sato

Kengo Ito

Masamichi Sukegawa

Chiaki Okui

Tetsuo Shimizu

Hirokazu Aoyama

Yosuke Kishikawa

Sumi Ishihara

Masahiro Higashi

Satoru Yoneda

Makoto Ono

Takahiro Taira

Akiyoshi Yamauchi

Nobuhiko Tsuda

Yasuhiko Sawada

Marina Nakano

Takahiro Kitahara

Yuuji Tanaka

Kazuya Asano

Shunji Kasai

Yoshihiro Yamamoto

Michio Asano

Dai Fukami

Takahisa Aoyama

Meiten Koh

Manabu Fujisawa

Hiroyuki Yoshimoto

Shinichi Yano

Takuya Yamabe

Kazutaka Hosokawa

Emi Yamamoto

Hiroki Yamaguchi

Moe Hosokawa

Kouji Kubota

Shinnosuke Nitta

Tatsuro Uchida

Michiru Kagawa

Atsuko Tanaka

Shuji Tagashira

Akiko Oya

A composition containing a polytetrafluoroethylene, a polymer (I) containing a polymerization unit (I) based on a monomer represented by the general formula (I), a nonionic surfactant, and an aqueous medium, wherein a content of the polytetrafluoroethylene in the composition is 10% by mass or more based on the composition, and a content of the nonionic surfactant in the composition is 1.0% by mass or more based on the polytetrafluoroethylene,CXX═CXR(—CZZ-A)  (I)wherein Xand Xare each independently F, Cl, H, or CF; Xis H, F, an alkyl group, or a fluorine-containing alkyl group; Ais an anionic group; R is a linking group; Zand Zare each independently H, F, an alkyl group, or a fluorine-containing alkyl group; and m is an integer of 1 or more.

Composition and method for producing the same

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:CXX═CXR(—CZZ-A)  (I)wherein Xand Xare each independently F, Cl, H, or CF; Xis H, F, an alkyl group, or a fluorine-containing alkyl group; Ais an anionic group; R is a linking group; Zand Zare each independently H, F, an alkyl group, or a fluorine-containing alkyl group; and m is an integer of 1 or more.

Polytetrafluoroethylene production method

A method for producing modified polytetrafluoroethylene including: polymerizing tetrafluoroethylene and a modifying monomer in an aqueous medium in the presence of a polymer (I) containing a polymerization unit (I) based on a monomer represented by the following general formula (I) to obtain a modified polytetrafluoroethylene:CXX=CXR(—CZZ-A)  (I)wherein Xand Xare each independently F, Cl, H, or CF; Xis H, F, an alkyl group, or a fluorine-containing alkyl group; Ais an anionic group; R is a linking group; Zand Zare each independently H, F, an alkyl group, or a fluorine-containing alkyl group; and m is an integer of 1 or more. Also disclosed is a composition containing the modified polytetrafluoroethylene and the polymer (I).

Production method of modified polytetrafluoroethylene and composition

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 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:CXX═CXR(—CZZ-A)  (I)wherein Xand Xare each independently F, Cl, H, or CF; Ais an anionic group; Xis H, F, an alkyl group, or a fluorine-containing alkyl group; R is a linking group; Zand Zare each independently H, F, an alkyl group, or a fluorine-containing alkyl group; and m is an integer of 1 or more.

Composition and stretched 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 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.

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 present invention provides a polytetrafluoroethylene aqueous dispersion containing high-molecular-weight, significantly small polytetrafluoroethylene particles and having excellent dispersion stability. The present invention relates to an aqueous dispersion containing polytetrafluoroethylene particles containing a tetrafluoroethylene unit alone or a tetrafluoroethylene unit and a modifying monomer unit based on a modifying monomer copolymerizable with the tetrafluoroethylene. The polytetrafluoroethylene particles have a volume average particle size of not smaller than 0.1 nm but smaller than 20 nm, a melt flow rate of not lower than 0 g/10 min but lower than 80 g/10 min determined at 380&#xb0; C. and 5 kg load, a melting point of 324&#xb0; C. to 360&#xb0; C., and an initial pyrolysis temperature of not lower than 400&#xb0; C.

Polytetrafluoroethylene aqueous dispersion

The present invention provides a polytetrafluoroethylene powder having high dispersibility in lubricants. The polytetrafluoroethylene powder includes polytetrafluoroethylene containing a tetrafluoroethylene unit alone or a tetrafluoroethylene unit and a modifying monomer unit based on a modifying monomer copolymerizable with the tetrafluoroethylene, and has a specific surface area of 32 m/g or larger.

Polytetrafluoroethylene powder

The present invention aims to provide a novel method for producing an aqueous dispersion containing non-melt-processable polytetrafluoroethylene particles. The present invention relates to a method for producing an aqueous dispersion containing non-melt-processable polytetrafluoroethylene particles, the method including polymerizing tetrafluoroethylene in an aqueous medium in the presence of perfluoro hexanoic acid or its salt.

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Settsu, Japan

Yoshinori Nanba