Rigid polyurethane foam is mainly applied in such fields as refrigerator and freezer, automobile, water heater, and heat preservation of building. According to the structure of demand for polyurethane in China in 2009, refrigerator and freezer took the largest proportion and accounted for 39.4% of the total consumption of rigid polyurethane foam, while building heat preservation held merely 4.2%; in the USA, however, building heat preservation accounted for more than 50% of the total consumption of rigid polyurethane foam. The difference in consumption structure results from the fact that China, as a big manufacturer of refrigerator and freezer, has a relatively large demand for rigid polyurethane foam in the field of refrigerator and freezer, but, with few requirements on building energy conservation and hence low utilization of heat insulators for external walls in the past, has a relatively small demand for rigid polyurethane foam in the field of building heat preservation.