Daikin Industries, Ltd.

Tadao Hayashi

Toshiro Miura

Yuuji Tanaka

Taketo Kato

Hirotoshi Yoshida

Takahiro Taira

Chiaki Okui

Yoshihiro Soda

Michinobu Koizumi

Ryou Hatayama

Taku Yamanaka

Shoji Kawachi

Kazutaka Hosokawa

Masayoshi Miyamoto

Shinji Murakami

Kazuhiro Mishima

Masanori Yamashita

A method for removing a fluorine-containing compound from discharge water, which includes bringing discharge water containing two or more fluorine-containing compounds represented by the following general formula (1) or (2) into contact with an adsorbent so as to adsorb the two or more fluorine-containing compounds:(H—(CF)—COO)M  General Formula (1):wherein m is 3 to 19, Mis H, a metal atom, NR, where Ris 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 p is 1 or 2;(H—(CF)—SO)M  General Formula (2):wherein n is 4 to 20; Mis H, a metal atom, NR, where Ris the same as above, imidazolium optionally having a substituent, pyridinium optionally having a substituent, or phosphonium optionally having a substituent; and q is 1 or 2.

Method for removing fluorine-containing compound from waste water

A method for producing an aqueous dispersion of purified polytetrafluoroethylene, the method including: removing or reducing a compound represented by Formula (1) or (2) below from an aqueous dispersion of polytetrafluoroethylene obtained using a hydrocarbon surfactant:(H—(CF)—COO)M; or  Formula (1):(H—(CF)—SO)M.  Formula (2): Also disclosed is a composition containing polytetrafluoroethylene substantially free from a compound represented by Formula (3) below and a molded body including the composition:(H—(CF)—SO)M.  Formula (3):

Method for producing purified polytetrafluoroethylene aqueous dispersion liquid, method for producing modified polytetrafluoroethylene powder, method for producing polytetrafluoroethylene molded body, and composition

To provide an un-sintered polytetrafluoroethylene processed article which has an un-sintered polytetrafluoroethylene layer formed by coating and/or impregnating with an aqueous dispersion of PTFE and is characterized in that a content of alkyl phenols detected from the un-sintered PTFE layer is not more than 0.1 ppm. The un-sintered PTFE-processed article scarcely contains alkyl phenols which are suspected as chemical substances having endocrine disrupting activity.

Un-sintered polytetrafluoroethylene processed article

Aqueous polytetrafluoroethylene dispersion composition and use thereof

Method for concentrating aqueous dispersion of fluorine-containing

Aqueous fluorine-containing polymer dispersion

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Settsu, Japan

Tadao Hayashi