Patent ID: 9447203
Filing Date: 2016-09-20
CPC Classification: B01J,B29B,B29C,C08F,C08J,Y10T

Claim Text:
1. Water absorbent polyacrylic acid (salt) resin having: 95 wt % or more of particles whose diameter is not less than 150 μm and less than 850 μm; logarithmic standard deviation (σζ) of particle size distribution of 0.25 to 0.50; absorption against pressure (AAP) of 20 [g/g] or more; a water absorbing rate (FSR) of 0.30 [g/g/s] or more; a saline flow conductivity (SFC) of 20[×10 an internal cell ratio of greater than 1.0% to 2.5%, which is calculated by {(real density)−(apparent density)}/(real density)×100, the water absorbent polyacrylic acid (salt) resin containing a polyvalent metal salt.