Investigation of Spray-Applied Polyurethane Foam Roofing Systems-II

摘要

An experimental investigation of the performance and properties of spray-appliedpolyurethane foam roofing systems is described. Polyurethane foam studied included densities of 2.0, 2.5, and 3.0 pcf. Elastomeric coating systems included catalyzed silicones, moisture-curing silicones, moisture-curing silicones, a water-based silicone, butyl-hypalons, hypalons, acrylics, neoprene-hypalon, butyls, chlorinated rubber, fibrated aluminum-asphalt, catalyzed urethanes, moisture-curing urethanes, urethane-hypalons, neoprene asphalt-acrylic emulsion, rapid-cure urethanes. A rigid cementitious coating system was also included. Properties of the coating system such as adhesion, tensile strength, wind-driven-rain absorption, impact strength and elongation are also reported. After exposure periods up to almost 12 years, eleven of the 54 coating systems were rated