Patent ID: 8729190
Filing Date: 2014-05-20
Classification: A61L,B01J,C08F,C08J,Y10T

Abstract:
1. A particulate water-absorbent agent comprising a polyacrylate salt-type water-absorbent resin as a main component, and having an absorption capacity without load of equal to or higher than 28 g/g, characterized by satisfying the following (a) to (c): (a) amount of water-soluble component under stirring is from 18 to 50% by mass of the water-absorbent agent; (b) difference between an amount of water-soluble component under stirring and an amount of water-soluble component in standing still (amount of water-soluble component under stirring−amount of water-soluble component in standing still) is from 15 to 50% by mass of the water-absorbent agent; and (c) diffusion absorption index is from 1.40 to 10.0 g/g/min; wherein the amount of water-soluble component under stirring represents amount of a dissolution polymer after 16 hours, to a normal saline solution under stirring, and the amount of water-soluble component in standing still represents amount of a dissolution polymer after 16 hours, to a normal saline solution in standing still.