Pirelli Pneumatici S.p.a.

Pirelli Tyre S.p.a.

Pirelli Coordinamento Pneumatici S.p.a.

Marco Nahmias Nanni

Renato Caretta

Gianni Mancini

Pierangelo Misani

Maurizio Stefano Galimberti

Antonio Alfonso Proto

Antonio Serra

Antonio Brunacci

Luca Giannini

Cristiano Puppi

Luciano Garro

Luigia Rossiello

Giuseppina Ratti

Angela Amaddeo

Carmine Capacchione

Claudio Zanichelli

Luisa Montinaro

Francesca Baione

Michela Caprio

Angela Lostritto

Oriana Motta

A tyre for vehicle wheels, includes a carcass structure including at least one carcass layer, a belt structure applied in a radially outer position with respect to the carcass structure, a tread band applied in a radially outer position with respect to the belt structure, and at least one layer of elastomeric material applied in a radially inner position with respect to the tread band; in which the at least one elastomeric material layer includes inorganic fibres of magnesium and/or aluminium silicates of nanometric dimensions.

High performance tyre for vehicle wheels

A self-sealing tire for vehicle wheels includes: a carcass structure, a tread band applied in a radially external position to the carcass structure at least in a crown area of the tire, a liner applied in a radially inner position to the carcass structure, and a layer of sealing material applied in a radially inner position to the carcass structure and which extends axially at least in all the crown area of the tire in which the sealing material includes a partially chemically crosslinked composition including an unsaturated styrene thermoplastic elastomer.

Self-sealing tyre for vehicle wheels

A tire having an internal surface includes an electronic device and an anchoring body mounted on the internal surface for engagement between the electronic device and the internal surface of the tire, wherein the anchoring body includes a crosslinked elastomeric material obtained by crosslinking a crosslinkable elastomeric composition including a synthetic diene rubber, preferably in an amount of from 20 to 80 phr, and a halogenated butyl rubber, preferably in an amount of from 80 to 20 phr.

Tyre comprising an electronic unit

A tire for a vehicle wheel includes a carcass structure, a belt structure, a tread, a pair of sidewalls, and at least one layer of sealing composition placed in a radially inner position with respect to the tread. The carcass structure includes at least one carcass ply shaped in a substantially toroidal configuration. Opposite lateral edges of the carcass structure are associated with respective bead wires. The belt structure includes at least one belt strip. The sealing composition includes at least one high molecular weight amorphous polymer, at least one low molecular weight amorphous polymer, and at least one reinforcing filler. The sealing composition is substantially non-crosslinked and has a flowability value, measured at a temperature of 100&#xb0; C. and at a pressure of 30 bar, not higher than 30 cm/s. A process for producing the tire for a vehicle wheel is also disclosed.

Self-sealing tire for a vehicle wheel and process for producing the tire

A tire for a vehicle wheel includes at least one first component and at least one second component. The at least one first component includes a first elastomeric material crosslinked in substantial absence of sulfur. The at least one second component includes a second elastomeric material crosslinked with sulfur. The at least one first component is in contact with the at least one second component. The first elastomeric material includes an elastomeric polymer including carboxylic groups. The first elastomeric material is crosslinked by reacting the elastomeric polymer including carboxylic groups with an epoxidized liquid organic compound. The epoxidized liquid organic compound comprises epoxide groups located internally along a molecule of the epoxidized liquid organic compound. The second elastomeric material includes at least one elastomeric polymer functionalized with at least one epoxide group, at least one carboxylic group, or at least one epoxide group and at least one carboxylic group.

Tire for a vehicle wheel and process for producing the tire

A tire for a motor vehicle includes at least one carcass ply, a belt structure radially external to the at least one carcass ply, a tread band radially external to the belt structure, a pair of sidewalls axially-external to the at least one carcass ply, and a pair of beads. The beads include bead wires or circumferentially-inextensible annular inserts. Opposite lateral edges of the at least one carcass ply are associated with respective beads. The at least one carcass ply includes a first composition having an elastic modulus at 70&#xb0; C. less than or equal to 5.0 MPa and a viscous modulus at 70&#xb0; C. less than or equal to 0.50 MPa. The sidewalls include a second composition having an elastic modulus at 70&#xb0; C. greater than or equal to 3.5 MPa and a viscous modulus at 70&#xb0; C. less than or equal to 0.50 MPa.

Motor vehicle tire with low rolling resistance

A crosslinkable elastomeric composition includes at least one elastomeric polymer including carboxylic groups, and at least one epoxidized elastomeric polymer including greater than or equal to 0.1 mol % and less than or equal to 20 mol % of epoxide groups relative to a total number of moles of monomers present in the at least one epoxidized elastomeric polymer. The composition is crosslinkable in a substantial absence of additional crosslinking agents. A tire for vehicles includes a carcass structure, a belt structure extended coaxially around the carcass structure, and a tread band extended coaxially around the belt structure. The tread band comprises an external rolling surface intended to come into contact with the ground. In one embodiment of the present invention, the tread band includes at least one crosslinked elastomeric material. A process for producing the tire is also disclosed.

Crosslinkable elastomeric composition, tire including a crosslinked elastomeric material, and process for producing the tire

An antiabrasive band includes a vulcanized elastomeric compound including at least one natural or synthetic rubber. A value of a loss factor of the compound at 70&#xb0; C. is less than or equal to 0.130. A value of a storage modulus of the compound at 70&#xb0; C. is greater than or equal to 6 MPa. A tire for a vehicle wheel is also disclosed, including at least one carcass ply and a pair of beads. A first edge of the at least one carcass ply is folded externally around one or more first bead wires and a second edge of the at least one carcass ply is folded externally around one or more second bead wires. Each bead includes one or more respective bead wires, a bead filling, and the antiabrasive band.

Tire for a vehicle wheel having an antiabrasive band

A pneumatic tire for vehicle wheels includes a radial carcass, a tread band, sidewalls and beads, and a belt structure. The tread band is provided with grooves on its surface for coming into contact with the ground and situated on a radial outer surface of the carcass. The sidewalls and beads anchor the tire on a wheel rim. The belt structure is disposed between the tread band and the carcass. Additionally, a fiber-reinforced elastomeric intermediate layer is placed between the belt structure and the tread band. Methods for manufacturing the pneumatic tire are also disclosed.

Tire, including fiber-reinforced elastomeric intermediate layer between the belt structure and tread band, and method of making the tire

A high performance tire includes a carcass provided with at least one carcass ply, a belt including two or more layers of reinforcing cords parallel to each other in a layer and crossed with respect to those of an adjacent layer, applied circumferentially on the carcass, a radially-external layer of circumferentially-oriented reinforcing cords applied on the belt, and a tread band comprising an underlayer and an external layer. The underlayer may have a hardness which is substantially constant over a temperature range between 23&deg; C. and 100&deg; C. The underlayer may also have an elastic modulus which is substantially constant over a temperature range between 70&deg; C. and 100&deg; C. Additionally, the underlayer may be made from an elastomer compound comprising reinforcing fibers and hardening resins. Further, the underlayer may have a hardness and an elastic modulus which remain substantially constant between 70&deg; C. and 100&deg; C. A method for making the tire is also disclosed.

High performance tire with tread band having an anisotropic underlayer stable with temperature variation

A tire for a vehicle includes a radial carcass, a tread band disposed radially outward of the carcass, and a belt structure interposed between the carcass and the tread band. The tread band also includes a first portion of a first elastomeric compound having a first modulus of elasticity between about 12 MPa and 16 MPa, measured at 23&deg; C., and a second portion of a second elastomeric compound having a second modulus of elasticity between about 7 MPa and 11 MPa, measured at 23&deg; C. Additionally, a first tread pattern formed on the first portion is different from a second tread pattern formed on the second portion. A related tread band, method for making an asymmetrical tire, and wheel for a vehicle are also disclosed.

Dual composition tread band for tire

A method for reducing the working temperature of a tire tread for vehicles utilizing a tire tread comprising a first portion and a second portion. The first portion comprising 100 parts by weight of an elastomeric material, 40-120 parts by weight of a filler, comprising from 50 to 100% by weight of carbon black and from 0 to 50% of silica, and 3-40 parts by weight of at least a conventional additive. The second portion comprising 100 parts by weight of an elastomeric material, 40-120 parts by weight of a filler, comprising from 30 to 100% by weight of silica and from 0 to 70% of carbon black, and 3-40 parts by weight of at least a conventional additive. However, the silica content in the second portion is at least 20% higher than in the first portion. Tires wherein the area of the first portion exceeds 37.1% of the total area of the tire tread are also disclosed.

Method for reducing the working temperature of a tire tread for vehicles and some tire treads capable of performing said method

A method for determining behavior of a viscoelastic material at a first temperature includes performing five or more measurements of a dynamic parameter as a function of deformation at each of at least a second, third, and fourth temperature. Eleven or more data points are chosen from the measurements. Each data point comprises a value of the dynamic parameter, an associated deformation, and an associated temperature. Values of the eleven parameters are determined by inserting at least eleven of the data points into a first equation. The first temperature and the values of the eleven parameters are inserted into the first equation. The dynamic parameter is approximated as a function of the deformation at the first temperature using the first equation. A related apparatus is also disclosed.

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Milan, Italy

Marco Nahmias Nanni