Patent ID: 8519041
Filing Date: 2013-08-27
Classification: A61L,C08J

Abstract:
1. A method to make a high-capacity superabsorbent polymer composition comprising the steps of: a) preparing a superabsorbent polymer by the process of polymerizing from about 55% to about 99.9% by weight of polymerizable unsaturated acid group containing monomer based on the superabsorbent polymer, and from about 0.001% to about 5% by weight of an internal crosslinking agent based on the polymerizable unsaturated acid group containing monomer, and wherein the superabsorbent polymer has a degree of neutralization of greater than about 25%; b) preparing superabsorbent polymer particles from the superabsorbent polymer; c) treating the superabsorbent polymer particles with surface additives including: d) heat-treating the coated superabsorbent polymer particle wherein the heat-treating may be done after application of the surface crosslinking agent.