Process for the preparation of uretdione group containing polyisocyanates

摘要

The invention deals with a process for the preparation of uretdione group containing polyisocyanates comprising reacting monomeric aromatic diisocyanates in the presence of a catalyst whereby imidazoles or benzimidazoles having general structure formulas I or II are used as catalysts <IMAGE> I 1 through R7 have the meaning cited in claim 1.