Two-part polyurethane/vinyl ester hybrid foam system and its use as flame-retardant material and material for pour-and-set foam in openings in buildings
Two-component polyurethane/vinyl ester hybrid foam system (I) with a polyol component (A) containing polyol, catalyst (for the polyol/isocyanate reaction), vinyl monomer(s) (VM1) and water or gaseous blowing agent and a polyisocyanate component (B) containing polyisocyanate(s) and a catalyst for the polymerisation of VM1, in which component (A) also contains a complex of a multivalent metal with a chelating polymerisable vinyl monomer (VM2).