WATER-ABSORBING AGENT

摘要

PROBLEM TO BE SOLVED: To provide a novel water-absorbing agent which exhibits an excellent absorption capacity under a load (AAP), gel layer liquid permeation rate under a load (FRUP), saline flow conductivity (SFC), and shape-maintaining property and ball burst strength (BBS) of a swollen water-absorbing agent aggregate, and excellent persistency of these effects for a long time. SOLUTION: The water-absorbing agent contains a predetermined water-absorbing resin particle (A) and a cationic polymer compound (B) the amount of which to be used is 0.01-10 parts weight on the basis of 100 parts weight water-absorbing resin particle (A) and which is bonded substantially ionically to the water-absorbing resin particle (A). The water-absorbing agent is characterized by exhibiting a free swelling capacity of not less than 23 g/g (GV), an absorption capacity of not less than 20 g/g under a load of 4.9 kPa (APP), saline flow conductivity (SFC) of not less than 50(10-7×cm3×s×g-1) (SFC), a gel deformation of not more than 12.5 cm under a short-time load (0.5 hrPT), and a gel deformation deterioration of not more than 3.5 cm under a load with the passage of time (ΔPT). COPYRIGHT: (C)2007,JPO&INPIT