Patent ID: 7816426
Filing Date: 2010-10-19
Classification: A61L,C08F,C08K

Abstract:
1. A superabsorbent polymer composition comprising a superabsorbent polymer comprising: a) from about 55% to about 99.9% by weight of the superabsorbent polymer of polymerizable unsaturated acid group containing monomer based on the superabsorbent polymer; and b) from about 0.001% to about 5% by weight of internal crosslinking agent based on the polymerizable unsaturated acid group containing monomer; c) from about 50 to 1000 ppm of a thermal initiator 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), b) and c) are polymerized into a crosslinked hydrogel, which is then prepared into superabsorbent polymer particles; the superabsorbent polymer composition further consisting essentially of the following surface additives to form superabsorbent polymer composition particles and wherein the superabsorbent polymer composition has a free swell gel bed permeability of at least about 6 Darcy as measured by the Free Swell Gel Bed Permeability Test.