Patent ID: 7291674
Filing Date: 2007-11-06
Classification: A61L,C08L

Abstract:
1. Superabsorbent polymer particles consisting essentially of: a) a polymeric resin composition comprising i) from about 55 to about 99.9% by weight of polymerizable unsaturated acid group containing monomers; ii) from about 0.001 to about 5.0% by weight of the polymerizable unsaturated acid group containing monomers of an internal crosslinking agent; iii) from 0 to about 25% by weight of the polymerizable unsaturated acid group containing monomers of a preneutralizing agent; wherein the polymeric resin composition is preneutralized from 0 to about 50 mole %; wherein the polymeric resin composition is formed into particles, and b) a water swellable, water-insoluble aminopolysaccharide polymer particles; wherein when the superabsorbent polymer is contacted with an aqueous solution, the polymeric resin is neutralized by the aminopolysaccharide polymer so that the superabsorbent polymer has a degree of neutralization of about 20 mole % or more than the preneutralization degree of the polymeric resin composition wherein the polymeric resin composition particles and aminopolysaccharide polymer particles are combined to form the superabsorbent polymer particles.