| abstract |
It has been discovered that improved poured-in-place sandwich panels (10) may be made which have a planar, rigid, cellular polyisocyanurate or polyurethane foam core (12), an interior facer (18) on one side of the polyisocyanurate foam core and a metal skin (20) on the other, opposite side of the polyisocyanurate foam core. Adhesion of the metal skin to the polyisocyanurate or polyurethane foam core is improved through the use of a primer layer (22), such as a polyurea or a polyepoxide. Preferably, glass fibers are provided in the polyisocyanurate or polyurethane foam core as reinforcement and as fire retardant. |