METHOD FOR PRODUCING WATER-ABSORBENT POLYMER PARTICLES WITH A HIGHER PERMEABILITY BY POLYMERISING DROPLETS OF A MONOMER SOLUTION

摘要

A process for preparing water-absorbing polymer beads with high permeability by polymerizing droplets of a monomer solution, comprising monomers bearing acid groups, in a gas phase surrounding the droplets, wherein the monomer solution comprises polyvalent cations and the polymer beads have a mean diameter of at least 150 μm.