Verfahren zur Herstellung von Polyisocyanaten mit Biuretstruktur

摘要

Biuret triisocyanates of the general formula wherein R is an aliphatic or alicyclic residue, are prepared by reacting an aliphatic diisocyanate and/or alicyclic diisocyanate with a monohydric tertiary alcohol at a temperature within the range of 70-205 DEG C. in an isocyanate: alcohol molar ratio of at least 2.5: 1.