Preparation of Resins Salt-Resisting and High Water-Absorbing by Water Solution Copolymerization

The high water-absorbing resin,i.e.,poly(acrylamide-sodium acrylate-2-hydroxyethyl methacrylate),was prepared by water solution copolymerization under the condition of using potassium persulfate as initiater,water as the dispersant,N,N-methylene-bisacrylamide as the crossling agent.The relations between the characteristics of the resin and the monomers composition,the amount of crosslinker and initiator were also studied.The absorption power of the resin is 1000(g·g -1 )for deionizing water,88(g·g -1 )for 0 9%NaCl solution.