WASSERABWEISENDES AGENS FÜR ZELLEN

摘要

To provide a water-repelling agent for batteries which comprises an aqueous dispersion or organosol containing fine particles having an average particle size of from 0.05 to 1 mu m and made of a tetrafluoroethylene-perfluoro(alkyl vinyl ether) copolymer and/or a non-fibril-forming tetrafluoroethylene polymer, is obtained without use of a powder of a fluorine-containing resin as it is, can enhance chemical resistance, heat resistance and water repellency particularly more effectively without being fibrillated even if mixed with electrode materials and is excellent in workability, and to provide a battery which is produced by using the water-repelling agent for batteries and is excellent in cycle life and internal pressure characteristics.