Patent ID: 7659342

Claim:
A tire comprising: core-shell nanoparticles including a shell comprising a polymer formed from a first monomer of at least formula (I): in which R1 and R2 are hydrogen, and each of R3, R4, R5, and R6 is independently selected from the group consisting of hydrogen, methyl, ethyl, propyl, and isopropyl; and a core comprising a polymer formed from at least a second monomer of formula (II): in which up to three of R7, R8, R9, and R10 are each independently selected from the group consisting of hydrogen, methyl, ethyl, propyl, and isopropyl, and at least one of R7, R8, R9, and R10 is a polar group that is more polar than any one of R1, R2, R3, R4, R5, and R6 groups; wherein the polar group in the second monomer is a heterocyclic group; wherein the nano-particles are cross-linked with di-vinyl- or tri-vinyl-substituted aromatic hydrocarbon; wherein the nano-particles are dispersed in a rubber matrix.