| abstract |
An expandable bladder (1) for manufacturing pneumatic tyres is used in combination with a vulcanisation apparatus (2) comprising, for example, a mould (3) having a plurality of sidewall plates (4) and tread sectors (5) that, when mould (3) is closed, delimit a moulding cavity suitable for housing the green pneumatic tyre (6) to be cured. According to the invention, the expandable bladder (1) comprises an elastomeric material obtained by curing an elastomeric composition comprising at least one butyl rubber and at least one compound having at least one double bond and an at least partially fluorinated alkyl or polyoxyalkylene chain. |