PROCESS FOR THE MANUFACTURE OF ALLOPHANATES HAVING ISOCYANATE GROUPS

摘要

The present invention relates to a process for preparing an isocyanate group-containing allophanate corresponding to formula (I) (see fig. I), wherein R represents the residue obtained by removing the isocyanate groups from a (cyclo)aliphatic or araliphatic diisocyanate, Y represents the represents an m-valent residue obtained by removing the hydroxyl groups from a (poly)hydroxyl compound having m OH groups and n and m are the same or different and have a value of 1 to 5, by reacting an isocyanate group-containing oxadiazinetrione with a primary alcohol in the presence of a basic catalyst having a pKa value of >6.