Patent ID: 7169843
Filing Date: 2007-01-30
Classification: A61L,C08F,C08J

Abstract:
1. A superabsorbent polymer composition comprising a polymer consisting essentially of: a) from about 55 to about 99.9 wt. % of polymerizable unsaturated acid group containing monomers; b) from about 0.001 to about 5.0 wt. % based on the weight of a) of internal crosslinking agent; said superabsorbent polymer composition further comprising c) from about 0.001 to about 5.0 wt. % based on dry polymer powder weight of surface crosslinking agent applied to the particle surface; d) from about 0.01% to about 5 wt. % based on dry polymer powder weight of a penetration modifier added immediately before, during or immediately after the surface crosslinking step; e) from 0 to about 5 wt. % based on dry polymer powder weight of a multivalent metal salt on the surface; f) from 0 to 2 wt % based on dry polymer powder weight of a surfactant on the surface; and g) from about 0.01 to about 5 wt % based on dry polymer powder weight of an insoluble, inorganic powder wherein the composition has a degree of neutralization of more than about 25%; and a gel bed permeability numeric value GBP is at least about [54000 e