公开(公告)号：US10668679B2

公开(公告)日：2020-06-02

申请号：US15537873

申请日：2015-11-17

申请人： PIRELLI TYRE S.P.A.

发明人： Elena Prandini ,  Pierluigi De Cancellis ,  Alberto Scurati

IPC分类号： B29B7/00 ,  B29B7/90 ,  B29D30/06 ,  B29D30/48 ,  B29D30/08 ,  B29B7/48 ,  B29B7/74 ,  B29B7/18 ,  B29B7/46 ,  B29K21/00 ,  B29C48/465 ,  B29C48/535 ,  B29C48/35 ,  B29C48/625 ,  B29C48/385 ,  B29C48/37 ,  B29C48/30 ,  B29C48/07 ,  B29C48/57 ,  B29C48/285 ,  B29C48/00

摘要： A process for producing tyres including building a green tyre having two bead structures. Each bead structure includes a bead filler. The bead filler or another rigid component of the green tyre includes a final elastomeric compound produced by the following: feeding elastomeric polymer and reinforcement filler to a first batch mixing device; mixing and dispersing the reinforcement filler in the elastomeric polymer and unloading the obtained elastomeric compound; feeding the obtained elastomeric compound, along with at least 5 phr of reinforcement resin, to a continuous mixing device of intermeshing and co-rotating twin-screw or multi-screw type or of planetary type; mixing the reinforcement resin in the elastomeric compound and unloading the obtained elastomeric compound; and feeding the obtained elastomeric compound along with the components capable of facilitating the cross-linking to a second batch mixing device and mixing to obtain the final elastomeric compound. The first and second batch mixing device have two counterrotating rotors.

公开(公告)号：US11732115B2

公开(公告)日：2023-08-22

申请号：US16306406

申请日：2017-06-06

申请人： PIRELLI TYRE S.p.A.

发明人： Pierluigi De Cancellis ,  Thomas Hanel ,  Francesco Parazzoli ,  Giuseppina Ratti ,  Juergen Wagemann ,  Marianna Zinna

IPC分类号： C08L9/06 ,  B60C1/00

CPC分类号： C08L9/06 ,  B60C1/0016 ,  B60C1/0025 ,  B60C2001/0058 ,  C08L2205/03 ,  C08L2207/04

摘要： The present invention relates to a tire (100) for vehicle wheels comprising a tire component comprising a crosslinked elastomeric material obtained by crosslinking a crosslinkable elastomeric composition, wherein said elastomeric composition comprises a polymer blend comprising (a) 50 to 95 percent by weight of a first elastomeric polymer and (b) 5 to 50 percent by weight of a second elastomeric polymer based on the total weight of the polymer blend. The second elastomeric polymer (b) is obtainable by (i) anionic polymerization of at least one conjugated diene monomer and one or more a-olefin monomer(s) in the presence of a polymerization initiator in an organic solvent, and (ii) coupling the polymer chains obtained in (i) by a coupling agent. The second elastomeric polymer (b) has a weight-average molecular weight (Mw) in the range of 5,000-40,000 g/mol and a coupling rate of at least 50 percent by weight.