| 摘要 |
<p>Disclosed are polyurethane powder coating materials, essentially comprising a) an isocyanate component which is partially or totally blocked with 1,2,4-triazole, b) a hydroxyl-containing polymer, and c) if required, suitable auxiliaries and additives. The isocyanate component consists of physical mixtures of individual trimers (isocyanato-isocyanurates) of (a) an aliphatic diisocyanate and (b) at least one of a (cyclo)aliphatic diisocyanate and a cycloaliphatic diisocyanate. The powder coating materials have high reactivity.</p> |
