METHOD FOR THE SECONDARY CROSSLINKING OF WATER-ABSORBING POLYMERS WITH CYCLIC CARBAMATES AND/OR CYCLIC UREAS

摘要

The invention relates to a method for the secondary crosslinking of water-absorbent polymers by treating the polymer with at least one secondary crosslinking agent and post-crosslinking and drying the same during or after the treatment by increasing the temperature. Said at least one secondary crosslinking agent represents a cyclic carbamate or a cyclic urea obtained by reacting an amino alcohol or a diamine with a cyclic carbonate.