STABILIZED BLOCKED ISOCYANATES AND THEIR USE IN POLYURETHANESTOVING LACQUERS

摘要

The present invention relates to (cyclo)aliphatic polyisocyanates which have a content of blocked and unblocked isocyanate groups (calculated as NCO) of 5 to 25 wt.%, in which at least 95% of the isocyanate groups are present in a form blocked with blocking agents, and which also contain 0.1 to 5.0 wt.% of amines having a structural unit corresponding to formula (I) <IMG> The present invention also relates to the use of the blocked polyisocyanates according to the invention as crosslinking agents for organic polyhydroxyl compounds in 1 C- PUR stoving lacquers, especially for automotive clearcoats and coil coating lacquers.