| 摘要 |
PURPOSE:To prevent the corrosion of materials in the water tank of a flush toilet by making an aldehyde compound represented by a specified formula coexist with a bleaching agent contg. halogen and remaining in the water tank. CONSTITUTION:When a bleaching agent contg. halogen is used in a flush toilet as a cleaning agent for an autocleaner, it remains in the water tank. A dialdehyde compound represented by formula I or II (where each of X and Y is H, hydroxyl, lower alkyl or lower hydroxyalkyl, and n is 1-8) is made to coexist with the remaining bleaching agent contg. halogen by 0.05-3pts.wt. per 1pt. halogen. One or more kinds of compounds selected among metallic hypochlorites, metallic hypobromites, dichloroisocyanuric acid, etc. are used as the bleaching agent contg. halogen. |
