Mixture of blocked polyisocyanates, useful in mixtures with melamine resins for the curing of baked coatings, comprises 3,5-dimethylpyrazole as the sole blocking agent

摘要

A mixture of blocked polyisocyanates (I) comprises: (A) blocked polyisocyanates based on 1,6-diisocyanatohexane (HDI); (B) blocked polyisocyanates based on cycloaliphatic diisocyanates; and (C) 3,5-dimethylpyrazole as the sole blocking agent used in (A) and (B) whereby the ratio of (A):(B) is 1:1.8.