| abstract |
The present invention relates to process for the preparation of a vulcanisable elastomeric composition, a vulcanisable elastomeric composition obtainable with such a process, a structural element of a tyre comprising a vulcanized elastomeric material obtained by vulcanization of such a vulcanisable elastomeric composition, and a tyre comprising such structural element, wherein said process comprises • a mixing step (i) in which at least one elastomeric polymer is mixed with one or more additives, except vulcanisation agents, to form a non-vulcanisable elastomeric composition, • a mixing step (ii) in which the non-vulcanisable elastomeric composition obtained in the mixing step (i) is mixed with a vulcanisation agent, characterised in that said mixing step (i) comprises: - a first mixing step (ia) in which said at least one elastomeric polymer is mixed with a non-functionalised white reinforcing filler and a coupling agent to form a first elastomeric composition, and - a second mixing step (ib) in which said first elastomeric composition is mixed with a functionalised silica to form said non-vulcanisable elastomeric composition. |