| 摘要 |
<p>602431 Disclosed herein is a composition and process for low temperature curing of polyuretdione-polyol compositions in which the polyuretdione is prepared from a polyisocyanate with isocyanate groups and a polyol containing primary hydroxyl groups. The catalyst for the composition and process is an amine catalyst containing the group -N=C-N-, being aprotic, having a pKa greater than 20 and upon addition to the liquid coating composition causing a phase-change of the coating. The amine catalyst is further defined as a compound of formula (I), wherein the variables are defined in the specification.</p> |
