Patent ID: 8497336

Claim:
A process for producing water-absorbing polymer particles by polymerizing a monomer solution or suspension comprising a) at least one ethylenically unsaturated monomer which bears acid groups and optionally is at least partly neutralized, b) at least one crosslinker, c) at least one initiator, d) optionally one or more ethylenically unsaturated monomers copolymerizable with the monomers specified under a) and e) optionally one or more water-soluble polymers, in a continuous kneading reactor having at least two axially parallel shafts under an inert gas stream, wherein an inert gas volume flow is at most 10 m 3 /h per m 3 of reactor volume and homogeneously crosslinked water-absorbing polymer particles obtained by the polymerization have a centrifuge retention capacity of at most 38 g/g.