Preparation of biuret-containing polyisocyanates

摘要: A process for producing polyisocyanates containing one or more biuret groups, by reacting a) an aliphatic cycloaliphatic isocyanate with several groups (isocyanate b) a tertiary alcohol mixture of water and (biuretting agent at reaction temperature 100 to 250°C, said being characterized in that the is conducted presence c) stabiliser (c) which there are catalytic quantities urea, ammonia, biuret, urea derivative formula (I), R1, R2, R3 R4 hydrogen, C1-C10 alkyl C5-C10 aryl, carbonic acid amide (II) R5 C1-C12 group, 1, 2 3 hydrogen atoms may be replaced (III) radical.