Patent ID: 7838610

Claim:
A super-absorbent resin comprising a repeating unit comprising an ionic dissociation group in its main or side chain, wherein said resin has an absorption capacity without load to saline solution for 4 hours of not smaller than 10 g/g, and a solubility in ion-exchanged water of not lower than 70% by weight, wherein said super-absorbent resin is a particulate super-absorbent resin, and a mass average particle diameter of the particles is in a range of 150 to 3000 μm, wherein a neutralization ratio of the ionic dissociation group is in a range of 50 to 90% by mole, based on the total ionic dissociation groups, and wherein a logarithmic standard deviation of a particle size distribution of the particles is in a range of 0.20 to 0.60.