Daikin Kogyo Co., Ltd.

Agency of Industrial Science and Technology

Shinichiro Kai

Katsutoshi Yamamoto

Shoji Kawachi

Eiichi Torikai

Mutsusuke Namba

Youji Kawami

Shuhei Simasaki

A process for preparing filler-containing polytetrafluoroethylene fine powder which comprises mixing together an aqueous dispersion of particles of polytetrafluoroethylene and an aqueous dispersion of particles of a filler adsorbed with polyvalent cation at the surfaces so as to be charged positively in the presence of an anionic surfactant and a water-immiscible organic liquid to coagulate the polytetrafluoroethylene particles and the filler particles in combination and recovering the coagulated particles from the resultant dispersion mixture, said filler particles being per se chargeable negatively in water.

Process for preparing filler-containing polytetrafluoroethylene fine

A chemical-resistant diaphragm composed of a fluorine-containing polymer and potassium titanate and a method for the manufacture of said diaphragm by the steps of adding titanium oxide or titanic acid to a fluorine-containing polymer and heating the resultant mixture in the presence of potassium hydroxide.

Method of making a chemical-resistant diaphragm thereof

Growing community of inventors

Ibaragi, Japan

Shinichiro Kai