Patent ID: 6911499

Claim:
A process for the continuous production of powdered, crosslinked polymer compositions absorbing aqueous or serous fluids, as well as blood, comprising: a) 55-99.9 wt.-% of at least one polymerized, ethylenically unsaturated, polymerizable monomer which contains acid groups neutralized to at least 25 mole-%; b) 0-40 wt. % of polymerized, unsaturated monomers copolymerizable with a); c) 0.01-5.0 wt.-% of one or more crosslinking agents; d) 0-30 wt.-% of a water soluble polymer, the weight amounts a) through d) being based on anhydrous polymer composition, and the sum of these components always being 100 wt. %, wherein the powdered crosslinked polymer composition is made by continuous polymerization process wherein a parameter of the continuous polymerization process is varied by increasing and decreasing the parameter in a recurring pattern, during the polymerization process.