Tires having a crosslinkable elastomeric material layer with air barrier property

Tire comprising: - a carcass structure comprising at least one carcass ply, of a substantially toroidal shape, having opposite lateral edges associated with respective right-hand and left-hand bead structures, said bead structures comprising at least one bead core and at least one bead filler; - a belt structure applied in a radially external 10 position with respect to said carcass structure; - a tread band radially superimposed on said belt structure; - a pair of sidewalls applied laterally on opposite sides with respect to said carcass structure; - at least one layer including a crosslinked elastomeric material having air barrier properties; wherein said crosslinked elastomeric material is obtained by crosslinking a crosslinkable elastomeric composition comprising: (a) an amount of from (10) phr to (100) phr, preferably of from phr to (60) phr, of at least one butyl rubber; (b) an amount of from (0) phr to (90) phr, preferably of from (40) phr to (80) phr, of at least one diene (25) elastomeric polymer; (c) an amount of from (5) phr to (120) phr, preferably of from (15) phr to (90) phr, of at least one reinforcing filler selected; (d) an amount of from (2) phr to (20) phr, preferably of from (5) phr to (15) phr, of at least one copolymer of at least one ethylenically unsaturated carboxylic acid or a derivative thereof with at least one ethylenically unsaturated monomer containing at least one polyoxyalkylene side chain.