Abstract: A copolymer of ethylene and of a 1,3-diene of formula CH2?CR—CH?CH2, which copolymer bears a silanol or alkoxysilane function, the symbol R representing a hydrocarbon chain having from 3 to 20 carbon atoms, is provided. Such a copolymer improves the compromise between the content of ethylene in the polymer, its crystallinity and the stiffness of a rubber composition containing it.

Abstract: A rubber composition is based on 20 to 100 phr of a copolymer of ethylene, of a first 1,3-diene which is 1,3-butadiene, isoprene or a mixture thereof, and of a second 1,3-diene of formula CH2?CR-CH?CH2, the symbol R representing a hydrocarbon chain having 3 to 20 carbon atoms, the ethylene units in the copolymer representing more than 50 mol % of the monomer units of the copolymer; 0 to 80 phr of at least one diene elastomer having a weight content of diene units of greater than 50%; 10 to 100 phr of a plasticizing system comprising at least one plasticizing resin having a glass transition temperature above 20° C. and/or at least one plasticizer that is liquid at 23° C.; a reinforcing filler; and a crosslinking system. Also disclosed is an elastomer laminate and a rubber article, in particular a pneumatic or non-pneumatic tire.

Abstract: An elastomer laminate comprises at least two adjacent layers, the first layer consisting of a composition based on 20 to 100 phr of at least one copolymer comprising ethylene units and units of a formula CH2?CR—CH?CH2, the ethylene units in the copolymer representing more than 50 mol % of the monomer units, R representing a hydrocarbon chain having 3 to 20 carbon atoms, 0 to 80 phr of at least one diene elastomer having a weight content of diene units of greater than 50%, 10 to 100 phr of a plasticizing system comprising at least one plasticizing resin having a glass transition temperature above 20° C. and/or at least one plasticizer that is liquid at 23° C., a reinforcing filler, and a crosslinking system, and the second layer consisting of a composition based on a diene elastomer having a weight content of diene units of greater than 50% and a crosslinking system.

Abstract: A copolymer of ethylene and of a 1,3-diene of formula CH2?CR—CH?CH2 is provided. The copolymer bears an amine function, the symbol R representing a hydrocarbon chain having from 3 to 20 carbon atoms. Such a copolymer improves the compromise between the content of ethylene in the polymer, its crystallinity and the stiffness of a rubber composition containing it.

Abstract: A diblock polymer composed of a first block and a second block is provided. The first block is a statistical copolymer comprising units of a 1,3-diene and more than 50 mol % of ethylene units. The second block is a polyethylene with a melting point above 90° C. and a number-average molar mass greater than or equal to 2000 g/mol and less than or equal to 10 000 g/mol. Such a diblock polymer has improved rheology compared to a statistical copolymer of the same microstructure and of the same macrostructure as the first block of the diblock polymer.

Abstract: A terpolymer of ethylene, of a first 1,3-diene having from 4 to 6 carbon atoms and of a second 1,3-diene of formula CH2?CR-CH?CH2 is provided. The terpolymer contains more than 50 mol % of ethylene units and at least 1 mol % of units of the second 1,3-diene, the symbol R representing a hydrocarbon chain having from 3 to 20 carbon atoms. Such a polymer gives an improved compromise between its ethylene content, its stiffness and its degree of crystallinity for use in tires.

Abstract: A rubber composition which comprises a reinforcing filler, a crosslinking system and more than 50 to 100 phr of an elastomer which is a copolymer of ethylene and of a 1,3-diene CH2?CR—CH?CH2, the symbol R representing a hydrocarbon chain having from 3 to 20 carbon atoms. The rubber composition has a good compromise between the stiffness and hysteresis properties.

Abstract: A diene elastomer and a rubber composition comprising the diene elastomer is provided. The diene elastomer bears pendent imidazole functions in a molar content of at most 4% of the constituent repeating units of the diene elastomer, which diene elastomer is a copolymer of ethylene and of a 1,3-diene comprising ethylene units, the ethylene units representing at least 50 mol % of the constituent repeating units of the diene elastomer, the 1,3-diene being 1,3-butadiene or isoprene. Such an elastomer confers improved uncured properties on the rubber composition.

Abstract: The invention relates to a rubber composition which comprises a reinforcing filler, a crosslinking system and more than 50 to 100 phr of an elastomer which is a copolymer of ethylene and of a 1,3-diene CH2?CR—CH?CH2, the symbol R representing a hydrocarbon chain having from 3 to 20 carbon atoms. The rubber composition has a good compromise between the stiffness and hysteresis properties.

Abstract: A copolymer of ethylene and of isoprene, which comprises from 10 to 35 mol % of isoprene units, at least 70% of which are in the 3,4 configuration and a portion of which is in the 1,2 configuration is provided. A copolymer of this type with a reduced crystallinity is synthesized with a much higher productivity than its homologues of ethylene and of butadiene, and also confers improved curing properties on rubber compositions.

Abstract: A terpolymer of ethylene, of 1,3-butadiene and of an aromatic ?-monoolefin is provided. The terpolymer contains more than 60 mol %, preferably at least 70 mol %, and preferably at most 90 mol % of ethylene units, at most 10 mol % of aromatic ?-monoolefin units and 1,2-cyclohexanediyl units. Such a diene terpolymer rich in ethylene units has the advantage of exhibiting a reduced, or even zero, crystallinity.

Abstract: A rubber composition is based on 20 to 100 phr of a copolymer of ethylene, of a first 1,3-diene which is 1,3-butadiene, isoprene or a mixture thereof, and of a second 1,3-diene of formula CH2?CR-CH?CH2, the symbol R representing a hydrocarbon chain having 3 to 20 carbon atoms, the ethylene units in the copolymer representing more than 50 mol % of the monomer units of the copolymer; 0 to 80 phr of at least one diene elastomer having a weight content of diene units of greater than 50%; 10 to 100 phr of a plasticizing system comprising at least one plasticizing resin having a glass transition temperature above 20° C. and/or at least one plasticizer that is liquid at 23° C.; a reinforcing filler; and a crosslinking system. Also disclosed is an elastomer laminate and a rubber article, in particular a pneumatic or non-pneumatic tire.

Abstract: The invention relates to a rubber composition which comprises a reinforcing filler, a vulcanization system and more than 50 to 100 phr of an elastomer which contains more than 50 mol % of ethylene units and which is a copolymer of ethylene, of a first 1,3-diene which is 1,3-butadiene, isoprene or a mixture thereof, and of a second 1,3-diene of formula CH2?CR—CH?CH2, the symbol R representing an unsaturated aliphatic hydrocarbon chain having 3 to 20 carbon atoms.

Abstract: An elastomer laminate comprises at least two adjacent layers, the first layer consisting of a composition based on 20 to 100 phr of at least one copolymer comprising ethylene units and units of a formula CH2?CR—CH?CH2, the ethylene units in the copolymer representing more than 50 mol % of the monomer units, R representing a hydrocarbon chain having 3 to 20 carbon atoms, 0 to 80 phr of at least one diene elastomer having a weight content of diene units of greater than 50%, 10 to 100 phr of a plasticizing system comprising at least one plasticizing resin having a glass transition temperature above 20° C. and/or at least one plasticizer that is liquid at 23° C., a reinforcing filler, and a crosslinking system, and the second layer consisting of a composition based on a diene elastomer having a weight content of diene units of greater than 50% and a crosslinking system.

Abstract: A triblock polymer of formula B-A-B is provided. According to the formula, the symbol A represents a “central” block which is a statistical copolymer comprising units of a 1,3-diene and more than 50 mol % of ethylene units. The symbols B each represent an “end” block which is a polyethylene with a melting point of greater than 90° C. and a number-average molar mass of greater than or equal to 2000 g/mol and less than or equal to 10 000 g/mol. The polymer has improved rheological properties relative to a statistical copolymer based on ethylene and 1,3-diene of the same microstructure without changing its mechanical and dynamic or thermal properties.

Abstract: A copolymer of ethylene and of a 1,3-diene of formula CH2?CR—CH?CH2 is provided. The ethylene units represent between 50 mol % and 95 mol % of the ethylene units and of the units of the 1,3-diene, and the units of the 1,3-diene of 1,2 and 3,4 configuration represent more than 50 mol % of the units of the 1,3-diene. The symbol R represents a hydrocarbon chain having from 3 to 20 carbon atoms. Such a copolymer exhibits an improved compromise between the degree of crystallinity and the stiffness and makes it possible to widen the field of application of ethylene-rich diene copolymers in rubber compositions.

Abstract: The invention relates to a copolymer of ethylene and of a 1,3-diene of formula CH2?CR—CH?CH2, which copolymer bears an amine function, the symbol R representing a hydrocarbon chain having from 3 to 20 carbon atoms. Such a copolymer improves the compromise between the content of ethylene in the polymer, its crystallinity and the stiffness of a rubber composition containing it.

Abstract: The invention relates to a copolymer of ethylene and of a 1,3-diene of formula CH2?CR—CH?CH2, which copolymer bears a silanol or alkoxysilane function, the symbol R representing a hydrocarbon chain having from 3 to 20 carbon atoms. Such a copolymer improves the compromise between the content of ethylene in the polymer, its crystallinity and the stiffness of a rubber composition containing it.

Abstract: A terpolymer of ethylene, of a first 1,3-diene having from 4 to 6 carbon atoms and of a second 1,3-diene of formula CH2?CR-CH?CH2 is provided. The terpolymer contains more than 50 mol % of ethylene units and at least 1 mol % of units of the second 1,3-diene, the symbol R representing a hydrocarbon chain having from 3 to 20 carbon atoms. Such a polymer gives an improved compromise between its ethylene content, its stiffness and its degree of crystallinity for use in tires.

Abstract: A diblock polymer composed of a first block and a second block is provided. The first block is a statistical copolymer comprising units of a 1,3-diene and more than 50 mol % of ethylene units. The second block is a polyethylene with a melting point above 90° C. and a number-average molar mass greater than or equal to 2000 g/mol and less than or equal to 10 000 g/mol. Such a diblock polymer has improved rheology compared to a statistical copolymer of the same microstructure and of the same macrostructure as the first block of the diblock polymer.