Effect of Ultra Fine Al(OH)_3 on Properties of Polyurethane Elastomer

s: Polyurethane elastomer was prepared by hydroxyl-terminated polybutadiene (HTPB),toluene diisocyanate and flame retardant/smoke suppression fillings-Al(OH) 3.The effects of contents and particle size of Al(OH) 3 on the mechanical properties and combustion behavior of the elastomer were studied. Light transmittance behavior,mechanical properties and combustion behavior were tested.Results state that the flame retardant/smoke suppression, mechanical and combustion properties of the elastomer could be increased by decreasing the particle size and increasing the contents of Al(OH) 3. Better flame retardant/smoke suppression and mechanical properties occurred while the content of Al(OH) 3 is 15 phr,and particle size is 7.12 μm.