This invention relates to a protected organotin-based catalyst system for polyurethane synthesis that is useful in coatings applications. The catalyst has low activity in the absence of oxygen. When a coating mixture comprising the catalyst is sprayed and/or applied to a substrate as a thin film in air, the catalyst is activated. For solvent-based refinish systems comprising hydroxyl and isocyanate species at high solids levels, the catalyst system therefore provides extended viscosity stability, i.e., pot life.
本发明涉及一种用于聚
氨酯合成的
有机锡催化剂系统,该系统在涂料应用中非常有用。该催化剂在缺氧条件下具有低活性。当涂料混合物包含该催化剂,并在空气中作为薄膜喷涂和/或涂覆到基底上时,该催化剂被激活。对于包含高固体含量的羟基和
异氰酸酯物种的溶剂基复合材料,该催化剂系统因此提供了延长的粘度稳定性,即潜伏期。