Patent ID: 7361712
Filing Date: 2008-04-22
Classification: A61L,C08F,C08J,C08L

Abstract:
1. A water absorbing agent comprising a crosslinked polymer including a water-soluble vinyl monomer (a1) that is free from lithium salts and/or a vinyl monomer (a2) that is formed into the water-soluble vinyl monomer (a1) that is free from lithium salts by hydrolysis, and a crosslinking agent (b) as an essential constituting unit, wherein the following formulae (1) and (2) are satisfied: wherein (x1) denotes a water-retention amount (g/g) of the water absorbing agent after being soaked in a physiological saline solution for one hour; (x2) denotes an absorption amount (g/g) of the water absorbing agent after being soaked in a physiological saline solution under loading of 0.9 psi for one hour; and (Y) denotes a liquid permeation speed (ml/min) of a physiological saline solution after the water absorbing agent is soaked in a physiological saline solution under loading of 0.3 psi for one hour.