Patent ID: 7871640
Filing Date: 2011-01-18
Classification: A61F,A61L,C08J

Abstract:
1. A superabsorbent polymer, comprising: a. superabsorbent polymer particles selected from the group consisting of granules, flakes, spheres, powders, platelets, and beads, each of the particles comprising a surface and a core, wherein a plurality of aliphatic C—H groups are present at the surface; and b. polymer chain segments, wherein at least some of said polymer chain segments are covalently surface cross-linked to each other after formation of said superabsorbent polymer particles to provide surface cross-links, wherein at least some of the surface cross-links comprise the reaction product of cross-linking molecules having at least two C═C double bonds and wherein at least some of the surface cross-links further comprise the reaction product of radical former molecules that chemically react with the aliphatic C—H groups when the radical former molecules are irradiated.