Patent ID: 7322393

Claim:
A tyre for a vehicle wheel, comprising: a carcass structure comprising at least one carcass ply; a belt structure disposed in a circumferentially outer position with respect to the carcass structure; a tread circumferentially superimposed on the belt structure; a pair of sidewalls disposed laterally on opposite sides with respect to the carcass structure; and at least one layer of sealing material obtained by thermal degradation of a composition comprising at least one thermally degradable polymer, said composition comprising: 100 phr of at least one thermally degradable polymer; greater than or equal to 50 phr and less than or equal to 150 phr of at least one reinforcing filler; greater than or equal to 30 phr and less than or equal to 100 phr of at least one plasticizer; and greater than or equal to 10 phr of at least one organic peroxide; wherein the at least one carcass ply is shaped in a substantially toroidal configuration, wherein opposite lateral edges of the at least one carcass ply are associated with respective bead wires, wherein each bead wire is enclosed in a respective bead, wherein the belt structure comprises at least one belt strip, wherein the at least one layer of sealing material is disposed in a radially inner position with respect to the at least one carcass ply, and wherein the sealing material comprises the following characteristics: a value of a dynamic elastic modulus, measured at a temperature of 80° C., at a frequency of 1 Hz, and with a deformation of 5%, that is at least 60% lower than the value of the dynamic elastic modulus measured at the temperature of 80° C., at the frequency of 1 Hz, and with a deformation of 1%; and the value of the dynamic elastic modulus, measured at the temperature of 80° C., at the frequency of 1 Hz, and with the deformation of 5%, that is greater than or equal to 0.05 kPa.