A tire having a rubber tread comprises a first radially inner layer C1 and a second radially outer layer C2, the first and second layers being intended to be in contact with a ground on which they are running, in new or worn condition, in which the rubber composition of the first layer C1 comprises more than 50 phr of a copolymer of ethylene and of a 1,3-diene, a reinforcing filler and a plasticizing system, the 1,3-diene being 1,3-butadiene or isoprene and the ethylene units in the copolymer representing more than 50 mol % of all the monomer units of the copolymer.

A tire has a tread axially separated into at least three portions, a central portion and two lateral portions, in which the rubber composition of the lateral portions comprises more than 50 phr of a copolymer of ethylene and of a 1,3-diene, a reinforcing filler and a plasticizing system, the 1,3-diene being 1,3-butadiene or isoprene and the ethylene units in the copolymer representing more than 50 mol % of all the monomer units of said copolymer.

A tire has a tread axially separated into at least three portions, a central portion and two lateral portions, in which the rubber composition of the lateral portions comprises more than 50 phr of a copolymer of ethylene and of a 1,3-diene, a reinforcing filler and a plasticizing system, the 1,3-diene being 1,3-butadiene or isoprene and the ethylene units in the copolymer representing more than 50 mol % of all the monomer units of said copolymer.

A rubber composition is based on at least: an elastomer matrix comprising more than 50 phr of a copolymer containing ethylene units and 1,3-diene units, the ethylene units in the copolymer representing more than 50 mol % of the monomer units of the copolymer; a specific 1,3-dipolar compound; a filler comprising predominantly silica and a crosslinking system comprising at least one radical polymerization initiator, and a co-crosslinking agent selected from the group consisting of (meth)acrylate compounds, maleimide compounds, allyl compounds, vinyl compounds and mixtures thereof.

A tire comprises a rubber composition based on at least one elastomeric matrix mainly comprising a random copolymer comprising ethylene units and conjugated diene units, the mole fraction of the ethylene units in the copolymer being within a range extending from 50% to 95%; a peroxide; and a specific acrylate derivative.

A tire comprises a rubber composition based on at least one elastomeric matrix mainly comprising a random copolymer comprising ethylene units and conjugated diene units, the mole fraction of the ethylene units in the copolymer being within a range extending from 50% to 95%; a peroxide; and a specific acrylate derivative.

A rubber composition which comprises at least 50 phr of a copolymer of ethylene and of a 1,3-diene which contains at least 50 mol % of ethylene units, a carbon black and a vulcanizing system comprising sulfur and a vulcanization accelerator which is a mixture of a primary accelerator and of a secondary accelerator is provided. The mass ratio between the amount of secondary accelerator and the total amount of accelerators is less than 0.7. Such a composition has a good compromise between the cohesion and curing properties.

A rubber composition which comprises at least 50 phr of a copolymer of ethylene and of a 1,3-diene which contains at least 50 mol % of ethylene units, a carbon black and a vulcanizing system comprising sulfur and a vulcanization accelerator which is a mixture of a primary accelerator and of a secondary accelerator is provided. The mass ratio between the amount of secondary accelerator and the total amount of accelerators is less than 0.7. Such a composition has a good compromise between the cohesion and curing properties.

In at least one embodiment, a process of forming a polymer includes supplying a feed having one or more olefin monomers and a solvent; contacting the feed with a catalyst to form a reaction mixture; treating the reaction mixture in a first separator to form a first polymer-rich mixture; introducing the first polymer-rich mixture into a second separator; introducing a volatile component and/or inert component into the first separator, the second separator and/or a line between the first separator and the second separator; treating the first polymer-rich mixture to form a second polymer-rich mixture; and devolatilizing the second polymer-rich mixture to obtain the polymer.

In at least one embodiment, a process of forming a polymer includes supplying a feed having one or more olefin monomers and a solvent; contacting the feed with a catalyst to form a reaction mixture; treating the reaction mixture in a first separator to form a first polymer-rich mixture; introducing the first polymer-rich mixture into a second separator; introducing a volatile component and/or inert component into the first separator, the second separator and/or a line between the first separator and the second separator; treating the first polymer-rich mixture to form a second polymer-rich mixture; and devolatilizing the second polymer-rich mixture to obtain the polymer.