A polyaldimine of the formula (I) with advantageous properties in use as latent hardener for compositions including isocyanate groups, and compositions containing the polyaldimine of the formula (I) and at least one polyisocyanate and/or at least one polyurethane polymer containing isocyanate groups. The polyaldimine of the formula (I) is odourless, pH-neutral, liquid at room temperature, has low viscosity, has little sensitivity to heat and moisture, and is stable in storage together with isocyanates. It can provide odourless single-component polyurethane compositions which have good stability in storage and which do not produce bubbles when hardened in the presence of moisture, and which cause no problematic odour emissions, giving a hardened elastic material with good mechanical properties and surprisingly little tendency towards plasticizer migration.
公式(I)的聚多醛具有优越的性能,在含有异
氰酸基的组分中作为潜在的固化剂使用,并且组合物含有公式(I)的聚多醛和至少一种聚
异氰酸酯和/或至少一种含有异
氰酸基的聚
氨酯聚合物。公式(I)的聚多醛在室温下呈液态,无气味,pH中性,粘度低,对热和湿度敏感性小,与
异氰酸酯一起储存时稳定。它可以提供无气味的单组分聚
氨酯组合物,其在储存中具有良好的稳定性,在存在湿度时硬化时不产生气泡,并且不会产生问题的气味排放,给出具有良好机械性能和惊人的
塑化剂迁移倾向的硬化弹性材料。