Compositions comprising Michael acceptor-terminated sulfur-containing prepolymers, thiol-terminated sulfur-containing prepolymers, and e phosphine catalysts useful in aerospace sealant applications are disclosed. The compositions exhibit extended pot life, cure rapidly following activation, and provide cured sealants having improved properties useful in aerospace sealant applications.
本发明公开了由迈克尔受体封端的含
硫预聚物、
硫醇封端的含
硫预聚物和用于航空密封剂的膦催化剂组成的组合物。这些组合物具有更长的固化寿命,在活化后可迅速固化,并可提供性能更好的固化密封剂,适用于航空航天密封剂应用。