METHOD FOR PRODUCING WATER-ABSORBING POLYMER PARTICLES WITH HIGH SWELLING RATE AND HIGH CENTRIFUGE RETENTION CAPACITY WITH SIMULTANEOUSLY HIGH PERMEABILITY OF THE SWOLLEN GEL BED

摘要

A process for producing water-absorbing polymer particles having high free swell rate and high centrifuge retention capacity with simultaneously high permeability of the swollen gel bed by polymerization of an aqueous monomer solution in a polymerization reactor having at least two shafts (kneaders) which rotate in an axially parallel manner, subsequent extrusion at high temperatures and thermal surface postcrosslinking.