| 摘要 |
PURPOSE:To obtain an elastic chelating resin of an improved metal ion adsorbing power difficult to break, by alkylene-phosphonating a resin obtained by reacting crosslinked chloromethylated polystyrene with a specified condensate. CONSTITUTION:A resin obtained by reacting chloromethylated crosslinked polystyrene with a condensate between polyethyleneimine of MW>=300 or m-xylenediamine and epichlorohydrin is alkylene-phosphonated. An example of the crosslinked polystyrene used is a styrene/divinylbenzene copolymer. The crosslinking agents which can be used include ethylene glycol dimethacrylate or trimethylolpropane trimethacrylate. The aminated resin is alkylene-phosphonated by the reaction with an aldehyde, trioxane, or the like by using phosphorous acid or the like as a phosphonating agent in the presence of hydrochloric acid and water, thus providing the purpose chelating resin. |
