| abstract |
INDUSTRIAL APPLICABILITY The present invention relates to a superabsorbent resin exhibiting excellent physical properties in which the cross-linking structure of the base resin powder in the surface cross-linked layer is optimized, has improved gel strength, improved CRC and pressure absorption capacity (AUP) . Wherein the superabsorbent resin comprises: a base resin powder comprising a first crosslinked polymer of a water-soluble ethylenically unsaturated monomer having at least partially neutralized acidic groups; And a surface cross-linked layer formed on the base resin powder, wherein the first cross-linked polymer comprises a cross-linked, oxygen-containing bond (-O- ) Or a nitrogen-containing bond (-NR-; R is hydrogen or an alkyl group or an amide bond having 1 to 3 carbon atoms). |