Polyurethane support for non-pneumatic tire

Non-pneumatic tires are disclosed having a support structure that includes an outer reinforced annular band, a hub and a set of supports extending between the hub and radially inward from the outer reinforced annular band. The support structure is formed at least in part of a polyurethane produced from a prepolymer comprising a reaction product of an aromatic diisocyanate monomer and an active hydrogen component selected from a polyol, a polyamine or combinations thereof, the aromatic diisocyanate monomer and the active hydrogen component mixed at a ratio of NCO to isocyanate-reacting function group of at least 1.8: 1, wherein the active hydrogen component has a number average molecular weight of between 1000 and 6000 and wherein the prepolymer contains no more than 10 wt% of residual aromatic diisocyanate monomer. The reaction components also include a curative. 披露一种非充气轮胎，其具有支撑结构，所述支撑结构包括外加固环形带、轮毂和一组在所述轮毂之间延伸并且从所述外加固环形带径向朝内的支撑件。所述支撑结构至少部分由聚氨基甲酸酯形成，所述聚氨基甲酸酯由包含芳香族二异氰酸酯单体和活性氢组分的反应产物的预聚物产生，所述活性氢组分选自多元醇、多元胺或其组合，所