HEAT-RESISTANT FILM AND COMPOSITE ION-EXCHANGE MEMBRANE

WIPO Patent Application WO/2004/037508

A1

A heat-resistant film comprising at least any one of a polybenzazole, aramid, and polyamide-imide, which is produced by sandwiching a polymer solution between at least two supports, forming the solution into a thin film by means of rolls, a slit, or a press, introducing the film to a coagulating bath, and removing the supports in the coagulating bath to coagulate the film; and a composite ion-exchange membrane comprising a composite layer comprising the film impregnated with an ion-exchange resin and, formed on each side of the composite layer, a surface layer which comprises an ion-exchange resin and includes no porous film. The heat-resistant film is excellent in all of heat resistance, mechanical strength, surface smoothness, and interlaminar peeling resistance and, in particular, has micropores. The composite ion-exchange membrane, which employs this heat-resistant film, has excellent ion conductivity.

Okamoto, Kazutake c/o Toyo Boseki Kabushiki Kaisha Research Institute (1-1 Katata 2-chom, Ohtsu-shi Shiga, 520-0292, JP)
Kobayashi, Hisato c/o Toyo Boseki Kabushiki Kaisha Research Institute (1-1 Katata 2-chom, Ohtsu-shi Shiga, 520-0292, JP)
Kawahara, Keizou c/o Toyo Boseki Kabushiki Kaisha Research Institute (1-1 Katata 2-chom, Ohtsu-shi Shiga, 520-0292, JP)
Hamamoto, Shiro c/o Toyo Boseki Kabushiki Kaisha Research Institute (1-1 Katata 2-chom, Ohtsu-shi Shiga, 520-0292, JP)
Takase, Satoshi c/o Toyo Boseki Kabushiki Kaisha Research Institute (1-1 Katata 2-chom, Ohtsu-shi Shiga, 520-0292, JP)
Sakaguchi, Yoshimitsu c/o Toyo Boseki Kabushiki Kaisha Research Institute (1-1 Katata 2-chom, Ohtsu-shi Shiga, 520-0292, JP)
Inukai, Cyuji c/o Toyo Boseki Kabushiki Kaisha Research Institute (1-1 Katata 2-chom, Ohtsu-shi Shiga, 520-0292, JP)
Yamada, Jun c/o Toyo Boseki Kabushiki Kaisha Research Institute (1-1 Katata 2-chom, Ohtsu-shi Shiga, 520-0292, JP)
Sakura, Daisuke c/o Toyo Boseki Kabushiki Kaisha Research Institute (1-1 Katata 2-chom, Ohtsu-shi Shiga, 520-0292, JP)
Nakamura, Muneatsu c/o Toyo Boseki Kabushiki Kaisha Research Institute (1-1 Katata 2-chom, Ohtsu-shi Shiga, 520-0292, JP)

PCT/JP2003/013577

May 06, 2004

October 23, 2003

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TOYO BOSEKI KABUSHIKI KAISHA (2-8 Dojimahama 2-chome, Kita-ku Osaka-shi, Osaka, 530-8230, JP)
Okamoto, Kazutake c/o Toyo Boseki Kabushiki Kaisha Research Institute (1-1 Katata 2-chom, Ohtsu-shi Shiga, 520-0292, JP)
Kobayashi, Hisato c/o Toyo Boseki Kabushiki Kaisha Research Institute (1-1 Katata 2-chom, Ohtsu-shi Shiga, 520-0292, JP)
Kawahara, Keizou c/o Toyo Boseki Kabushiki Kaisha Research Institute (1-1 Katata 2-chom, Ohtsu-shi Shiga, 520-0292, JP)
Hamamoto, Shiro c/o Toyo Boseki Kabushiki Kaisha Research Institute (1-1 Katata 2-chom, Ohtsu-shi Shiga, 520-0292, JP)
Takase, Satoshi c/o Toyo Boseki Kabushiki Kaisha Research Institute (1-1 Katata 2-chom, Ohtsu-shi Shiga, 520-0292, JP)
Sakaguchi, Yoshimitsu c/o Toyo Boseki Kabushiki Kaisha Research Institute (1-1 Katata 2-chom, Ohtsu-shi Shiga, 520-0292, JP)
Inukai, Cyuji c/o Toyo Boseki Kabushiki Kaisha Research Institute (1-1 Katata 2-chom, Ohtsu-shi Shiga, 520-0292, JP)
Yamada, Jun c/o Toyo Boseki Kabushiki Kaisha Research Institute (1-1 Katata 2-chom, Ohtsu-shi Shiga, 520-0292, JP)
Sakura, Daisuke c/o Toyo Boseki Kabushiki Kaisha Research Institute (1-1 Katata 2-chom, Ohtsu-shi Shiga, 520-0292, JP)
Nakamura, Muneatsu c/o Toyo Boseki Kabushiki Kaisha Research Institute (1-1 Katata 2-chom, Ohtsu-shi Shiga, 520-0292, JP)

B01D67/00; B01D69/12; B29C41/24; B29D7/01; C08J5/18; C08J9/26; H01B1/12; H01M8/02; H01M8/10; B01D71/56; B01D71/62; B01D71/64; (IPC1-7): B29C41/24; C08J5/18; C08J9/26; B29C39/18; H01B1/06; H01M8/02

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