Even without requiring such means for the continuous addition or sterilization and antibacterial treatment unit, a complicated process, the present invention provides a sterilization and antibacterial agents which may sterilization and antibacterial sustained in the electrodeposition coating system. Or specifically a cationic electrodeposition coating system for sustained release bactericidal and antibacterial agents, consisting of briquettes or tablets containing 1,2-benzisothiazolin-3-one present invention, 1,2-benzisothiazolin-3-one to provide a cationic electrodeposition coating system for sustained-release sterilization and antibacterial agent which is formed by housed in a water-permeable container. Also, put electricity Chaku-so cationic electrodeposition coating system, electrodeposition paint reservoir, electrode liquid storage tank, dip tank cleaning, to the wash water storage tank, etc. the sterilization and antibacterial agent, cationic electrodeposition coating, the present invention, or electrode liquid soaked in the wash water or is placed in a distribution under the wash water cationic electrodeposition paint, or electrode liquid, 1,2-benzo-3-one was to be gradually dissolved in the wash water cationic electrodeposition paint, or electrode liquid , to provide sterilization and antibacterial way of cleaning water cationic electrodeposition paint, or electrode liquid.本発明は、殺菌・抗菌処理装置や連続添加するための手段など、煩雑な工程を要さずとも、電着塗装システムにおける持続的な殺菌・抗菌ができる殺菌・抗菌剤を提供する。具体的に本発明は、1,2-ベンゾイソチアゾリン-3-オンを含有するタブレット又はブリケットからなるカチオン電着塗装システム用徐放性殺菌・抗菌剤、または1,2-ベンゾイソチアゾリン-3-オンを通水性容器に収納してなるカチオン電着塗装システム用徐放性殺菌・抗菌剤を提供する。また、本発明は、前記殺菌・抗菌剤をカチオン電着塗装システムの電着槽、電着塗料貯槽、極液貯槽、ディップ洗浄槽、洗浄水貯槽等に入れ、カチオン電着塗料、極液もしくは洗浄水中に浸しまたはカチオン電着塗料、極液もしくは洗浄水の流通下に置き、1,2-ベンゾイソチアゾリン-3-オンがカチオン電着塗料、極液もしくは洗浄水に徐々に溶解するようにした、カチオン電着塗料、極液もしくは洗浄水の殺菌・抗菌方法を提供する。
