Flame Retardant Pentane Blown Polyisocyanurate Foams for Roofing

摘要

The conversion from HCFC-141B to suitable alternate blowing agents in the rigid foam markets has accelerated as the deadline for its disappearance nears. Pentanes have been selected by the flexible faced laminate industry to replace R-141B. Plant conversions are underway. Other foam applications are considering pentanes. For the flexible faced lamination industry, passing the FM 4450 roof burn calorimeter test has become very difficult. Albemarle Corporation had developed a new intermediate scale burn testing device to simulate the FM test , and has used this tool to develop an optimized flame retardant package by using experimental design The work reported here will show that if properly formulated, systems containing pentanes can be used in roofing applications. The paper will show results of designed experiments to optimize fire performance in the FM 4450 roof burn calorimeter.