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

摘要

Disclosed is a process for postcrosslinking a water absorbing polymer by the polymer being treated with at least one postcrosslinker and postcrosslinked and dried during or after the treatment by raising the temperature, the at least one postcrosslinker being a cyclic carbamate or a cyclic urea, wherein the cyclic carbamate or the cyclic urea was obtained by reacting respectively an aminoalcohol or a diamine with a cyclic carbonate.