| abstract |
The present invention relates to a method for producing a superabsorbent resin exhibiting improved liquid permeability and absorption rate while maintaining excellent absorption performance. The method for producing a superabsorbent resin includes the steps of: crosslinking a water-soluble ethylenically unsaturated monomer having at least partially neutralized acidic groups in the presence of an internal crosslinking agent to form a hydrogel polymer comprising a crosslinked polymer; Drying, pulverizing and classifying the hydrogel polymer to form a base resin powder; A diol, a triol, or a polyol containing an alkylene carbonate having 2 to 5 carbon atoms, an alkyl group having 2 to 12 carbon atoms or a polyethylene glycol having 2 to 12 carbon atoms, an alkyl group having 2 to 12 carbon atoms, Surface crosslinking the base resin powder using a surface crosslinking solution comprising at least one surface crosslinking agent selected from the group consisting of diepoxy, triepoxy, or polyepoxy including polyethylene glycol having 2 to 12 carbon atoms; And adding and mixing the second alumina particles to the surface cross-linked superabsorbent resin. |