Patent ID: 11142615

Abstract:
The present invention relates to a super absorbent polymer which not only has excellent basic absorption performance but also can improve rewet characteristics and leakage suppression characteristics of hygienic materials such as diapers, and a method for preparing the same. The super absorbent polymer includes: a base polymer powder including a first cross-linked polymer of a water-soluble ethylenically unsaturated monomer having an acidic group of which at least a part is neutralized; and a surface crosslinked layer that is formed on the base polymer powder and includes a second cross-linked polymer in which the first crosslinked polymer is further crosslinked via a surface crosslinking agent, wherein the surface crosslinking agent includes a mixture of plural kinds of cyclic alkylene carbonates, and where the mixture has a Hansen solubility parameter by hydrogen bonding component of 13 or more.