<p>TITLE OF THE INVENTION Tire Filling Materials Tire filling material having high resilience produced by curing a mixture of (a) a polyoxypropylene polyol having an OH equivalent molecular weight of 900 - 1,800 and a functionality of 2 - 4, (b) a polyisocyanate, and (c) a plasticizer in the presence of a catalyst where the equivalent ratio (NCO/OH) of isocyanate groups in the component (b) to hydroxyl groups in the component (a) is from 0.8 - 2.0 and the amount of the component (c) is 10 - 200 parts by weight per 100 parts by weight of the component (a).</p>
