Method for preparing superabsorbent polymer and superabsorbent polymer

Superabsorbent polymer comprising

• base polymer powder comprising crosslinked polymer of water soluble ethylenically unsaturated monomers having acid groups of which at least a part are neutralized;
• and
• a surface crosslink layer that is formed on the base polymer powder, and comprises cuprous oxide through a surface crosslinking agent,
• wherein CRC is 39 to 50 g/g, and AUP is 16 to 23 g/g.

Superabsorbent polymer comprising

• base polymer powder comprising crosslinked polymer of water soluble ethylenically unsaturated monomers having acid groups of which at least a part are neutralized;
• and
• a surface crosslink layer that is formed on the base polymer powder, and comprises cuprous oxide through a surface crosslinking agent,
• wherein CRC is 30 to 50 g/g, and AUP is 16 to 25 g/g, and
• in an antibacterial activity test using artificial urine containing 104 CFU/ml of bacteria and nutrients, compared to superabsorbent polymer without cuprous oxide, at least 99% inhibition of bacterial proliferation is exhibited.