TIRE CONTAINING A CAST POLYURETHANE COMPONENT

A tire is disclosed having a path of thermal conductivity within a cast polyurethane component of the tire which extends from an internal portion of the tire to the tire's outer sidewall surface. The cast polyurethane component contains a dispersion of boron nitride particles. Preferably, the cast polyurethane is a reaction product of a liquid polyurethane reaction mixture comprising an organic polyisocyanate and polymeric polyol, or a primary aliphatic polyamine, desirably a diamine, and isocyanate terminated pre-polymer of an organic polyisocyanate and polymeric polyol, wherein said polymeric polyol is a saturated hydrocarbon polyol comprising at least one of polyester polyol and polyether polyol, and wherein the cast polyurethane does not contain carbon-to-carbon unsaturation. The boron nitride particles are preferably layered hexagonally crystalline boron nitride (h-BN) particles.