Patent ID: 7638570
Filing Date: 2009-12-29
Classification: A61L,C08J,Y10T

Abstract:
1. A water-absorbing agent, which is a particulate water-absorbing agent comprising water-absorbent resin particles (α) and a liquid-permeability-enhancing agent (β), wherein said water-absorbent resin particles (α) are prepared by crosslinking with a surface-crosslinking agent the surface of irregular-shaped pulverized particles of a crosslinked polymer made from a monomer comprising acrylic acid and/or its salt; wherein the particulate water-absorbing agent has: a mass-average particle diameter in the range of 234 to 394 μm, a logarithmic standard deviation (σζ) of a particle diameter distribution in the range of 0.25 to 0.45, an absorption capacity of not less than 15 g/g without load, and a water-extractable component content of not higher than 15 mass %; and further a liquid-permeability-enhancing agent (β) content in the range of 0.01 to 5 mass parts per 100 mass parts of the water-absorbent resin particles (α).