POLYMERIC FOAM COMPOSITES THAT MEET FACTORY MATERIAL 4880 REQUIREMENTS

摘要

"The present invention relates to a polymeric foam composites (PFCs) containing a polyurethane or polyisocyanurate foam can pass both ceiling an wall portions of the United Building Code 26-3 Room comer Bum Test can meet requirements for Factory Mutual 4880 approval. Polymeric foam composites of the present invention have a front face with"an exposed metal sheet. Polymeric foams in the PFCs contain at least 4 weight percent halogen, at least 10 percent of which comes from a highly-halogenated compound, at least 0.25 weight percent phosphorous, and a residual blowing agent composition that contains less than 50 weight percent chlorofluorocarbons and hydrochlorofluorocarbons. The polymeric foam also contains flame retarding fibers at an average copcentration of at least one weight percent, based on combined foam and fiber weight, within 0.125 inches (3.2 millimeters) of the foams front surface.