A rubber compound having at least two glass transition temperatures Tg1 and Tg2 is based on at least two rubber compositions C1 and C2, C1 comprising at least one elastomer E1 with Tg1, C2 comprising at least one elastomer E2 with Tg2 and a reinforcing filler, E2 being different from E1, where Tg1 is above or equal to -50° C., the rubber compound satisfies Tg1-Tg2 ≥ 23° C. and has a loss factor profile exhibiting the change in tan δ as a function of the temperature in °C. over a range extending from -80° C. to 60° C. at a frequency of 10 Hz and a constant stress of 0.7 MPa and exhibiting one or more peaks, such that all the tan δ peaks present at a temperature above Tg1 have a width at half height less than or equal to 23° C.; and E1 is predominant.

A rubber compound having at least two glass transition temperatures Tg1 and Tg2 is based on at least two rubber compositions C1 and C2, C1 comprising at least one elastomer E1 with Tg1, C2 comprising at least one elastomer E2 with Tg2 and a reinforcing filler, E2 being different from E1, where Tg1 is above or equal to -50° C., the rubber compound satisfies Tg1-Tg2 ≥ 23° C. and has a loss factor profile exhibiting the change in tan δ as a function of the temperature in °C. over a range extending from -80° C. to 60° C. at a frequency of 10 Hz and a constant stress of 0.7 MPa and exhibiting one or more peaks, such that all the tan δ peaks present at a temperature above Tg1 have a width at half height less than or equal to 23° C.; and E1 is predominant.

A tread comprising a plurality of grooves and manufactured using a rubber compound comprising at least one cross-linkable unsaturated chain polymeric base, a filler, a vulcanization system and a wax comprising at least 50% by weight nonacosandiols. At least part of said grooves has a hydrophobic surface structure comprising a plurality of protruding elements.

A tread comprising a plurality of grooves and manufactured using a rubber compound comprising at least one cross-linkable unsaturated chain polymeric base, a filler, a vulcanization system and a wax comprising at least 50% by weight nonacosandiols. At least part of said grooves has a hydrophobic surface structure comprising a plurality of protruding elements.

The present disclosure provides a tire in which cracks or other defects on the surface of a tire component can be reduced to provide an excellent market life. A tire including a rubber layer and satisfying the following relationships (1) and (2): E1/E2×100>25 (1); and E1/E2×T×100>50 (2) wherein E1 denotes the fracture energy (MPa.Math.%) determined by cutting a No. 7 dumbbell-shaped specimen cut out of the rubber layer, heat-treating the specimen with the cut sections attached to each other at 170° C. for 12 minutes, and then stretching and deforming the specimen; E2 denotes the fracture energy (MPa.Math.%) determined by heat-treating a No. 7 dumbbell-shaped specimen cut out of the rubber layer at 170° C. for 12 minutes and then stretching and deforming the specimen; and T denotes the thickness (mm) of the rubber layer.

The present disclosure provides a tire in which cracks or other defects on the surface of a tire component can be reduced to provide an excellent market life. A tire including a rubber layer and satisfying the following relationships (1) and (2): E1/E2×100>25 (1); and E1/E2×T×100>50 (2) wherein E1 denotes the fracture energy (MPa.Math.%) determined by cutting a No. 7 dumbbell-shaped specimen cut out of the rubber layer, heat-treating the specimen with the cut sections attached to each other at 170° C. for 12 minutes, and then stretching and deforming the specimen; E2 denotes the fracture energy (MPa.Math.%) determined by heat-treating a No. 7 dumbbell-shaped specimen cut out of the rubber layer at 170° C. for 12 minutes and then stretching and deforming the specimen; and T denotes the thickness (mm) of the rubber layer.

The present invention relates to a resin composition comprising: a base resin comprising a petroleum resin of which at least a part is hydrogenated or non-hydrogenated; and an additive comprising a modified C.sub.9 polymer having a structure in which a molecular weight modifier binds to at least one terminal of the two terminals of the petroleum resin of which at least a part is hydrogenated or non-hydrogenated. The present invention also relates to a gas barrier film comprising the resin composition, and a tire.

A modified conjugated diene-based polymer and a rubber composition including the same are disclosed herein. In some embodiments, the modified conjugated diene-based polymer includes a modified monomer-derived functional group represented by Formula 1, and an aminoalkoxysilane-based modifier-derived functional group at least one end thereof, wherein the polymer having a unimodal molecular weight distribution, and a polydispersity index (PDI) of 1.0 or more to less than 1.7. The polymer has a narrow and unimodal molecular weight distribution, and has excellent tensile properties and viscoelastic properties while having excellent processability.

A modified conjugated diene-based polymer and a rubber composition including the same are disclosed herein. In some embodiments, the modified conjugated diene-based polymer includes a modified monomer-derived functional group represented by Formula 1, and an aminoalkoxysilane-based modifier-derived functional group at least one end thereof, wherein the polymer having a unimodal molecular weight distribution, and a polydispersity index (PDI) of 1.0 or more to less than 1.7. The polymer has a narrow and unimodal molecular weight distribution, and has excellent tensile properties and viscoelastic properties while having excellent processability.

The invention relates to a copolymer of ethylene and of a 1,3-diene of formula CH.sub.2═CR—CH═CH.sub.2, 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.