Patent ID: 7696401

Claim:
A surface treated absorbent material comprising a superabsorbent material consisting essentially of a superabsorbent polymer consisting of a) at least about 75% by weight of the superabsorbent polymer of an anionic polymer comprising functional groups selected from carboxyl groups, sulfonate groups, sulphate groups, sulfite groups, and phosphate groups; and b) an internal crossliniking agent based on the polymerizable unsaturated acid group containing monomer, wherein the superabsorbent polymer has a degree of neutralization of greater than about 25%; wherein elements a) and b) are polymerized and prepared into superabsorbent polymer particles and further comprising the following surface additives to form surface treated superabsorbent polymer particles i) from about 0.5% to about 5% by weight of surface crosslinking agent based on the superabsorbent polymer composition; and ii) from about 0.63% to about 5% by weight of a non-cross linked cationic polymeric coating based on the superabsorbent polymer composition; wherein the superabsorbent material having a gel stiffness index of at least about 0.8.