Patent ID: 8945716
Filing Date: 2015-02-03
Classification: B01J,C08F,Y10T

Abstract:
1. A process for producing water-absorbing polymer particles, comprising A. polymerizing a monomer solution or suspension comprising a) at least one ethylenically unsaturated monomer which bears an acid group and optionally is partly neutralized, b) at least one crosslinker, c) at least one initiator, d) optionally one or more ethylenically unsaturated monomer copolymerizable with the monomer mentioned under a) and e) optionally one or more water-soluble polymer, B. classifying the resulting moist polymer gel, wherein the classifying of the moist polymer gel is performed by means of a plurality of bar decks arranged in a cascade in a vibrating frame, C. comminuting a coarse fraction removed in the classification of the moist polymer gel, then D. drying the resulting comminuted moist polymer gel.