Disclosed are flexible polyamines, flexible amine-terminated polyformal adducts, flexible-amine-terminated polythioether adducts, compositions comprising flexible polyamines and isocyanate-terminated prepolymers, and compositions comprising flexible amine-terminated adducts and isocyanate-terminated prepolymers. Uses of the compositions as sealants, and particularly as aerospace sealants, are also disclosed.
本发明涉及柔性聚胺,柔性胺基终止的
聚甲醛加合物,柔性胺基终止的聚
硫醚加合物,包括柔性聚胺和
异氰酸酯终止的预聚物的组合物,以及包括柔性胺基终止的加合物和
异氰酸酯终止的预聚物的组合物。本发明还公开了将这些组合物用作密封剂,特别是航空密封剂的用途。