Patent ID: 7183345
Filing Date: 2007-02-27
Classification: A61L,C08L

Abstract:
1. A process for the preparation of water-absorbent, water insoluble polymer particles, the process comprising: (I) polymerizing a polymerization mixture comprising: (a) one or more ethylenically unsaturated carboxyl-containing monomers, (b) one or more crossliniking agents, (c) optionally one or more comonomers copolymerizable with the carboxyl-containing monomer, and (d) a polymerization medium, to form a crossliniked hydrogel, (II) comminuting the hydrogel to particles, and (III) drying the hydrogel, wherein a solution comprising silver complex ions is added to the dried polymer particles, and wherein the dried polymer particles from step (III) are treated with an aqueous solution of aluminum sulfate prior to, simultaneously with or after the addition of the solution comprising silver complex ions.