CLEANING METHOD

摘要

PURPOSE:To clean and remove stain based on soft scale or slime by adding hydrogen peroxide and water soluble cationic polymer to water system and using hydrogen peroxide having low concentration. CONSTITUTION:(A) Hydrogen peroxide or hydrogen peroxide adduct (e.g. sodium percarbonate or sodium perborate) capable of producing hydrogen peroxide in water and (B) a polymer obtained by reaction of a water soluble cationic polymer, preferably alkylene polyamine and/or polyalkylene polyamine with epichlorohydrin or dichloroethyl ether and having 500-50000 molecular weight are added to a water system at amounts of the component A of 0.1-2wt.% and the component B of 0.01-0.5wt.%. A poly[2-hydroxyethylene(di-methylimino) ethylene(dimethylimino-)methylene dichloride expressed by formula I (n is 4-40) or poly[oxyethylene (dimethyl imino)-ethylene(dimethyl imino) ethylene chloride] expressed by formula II is preferably used as the component B.