Abstract: 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.

Abstract: 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.

Abstract: A rubber blend, particularly for pneumatic vehicle tires, harnesses, straps and hoses. The rubber blend includes at least one rubber blend A of a solid styrene-butadiene rubber with an average molecular weight Mn of 100,000 to 5,000,000 g/mol and a liquid butadiene rubber with an average molecular weight Mn of 500 to 9000 g/mol, wherein the styrene-butadiene rubber is solution-polymerized or emulsion-polymerized, as well as 30 to 300 phr of at least one silicic acid and further blend components.

Abstract: The vulcanizable rubber mixture according to this invention is used for rubber products in particular vehicle tires and vehicle tire treads, but also technical rubber products like belts on conveyor systems, technical hoses, vibration dampers and impact dampers, or wire coatings. All these products benefit from the improved processability that is achieved with the invention in that the mixture comprises a polymer represented by the formula F1-A-F2, or a mixture of F1-A-F2 with an astral or radial coupling product of F1-A-units, coupled by a multivalent coupling agent; wherein F1 represents a terminal functionalization of the polymeric chain, F2 represents a terminal functionalization different from F1; and A represents the polymeric chain of a polymer formed by the copolymerization between one or more conjugated dienes with one or more aromatic vinyl monomers.

Abstract: A rubber blend, particularly for pneumatic vehicle tires, harnesses, straps and hoses. The rubber blend includes at least one rubber blend A of a solid styrene-butadiene rubber with an average molecular weight Mn of 100,000 to 5,000,000 g/mol and a liquid butadiene rubber with an average molecular weight Mn of 500 to 9000 g/mol, wherein the styrene-butadiene rubber is solution-polymerized or emulsion-polymerized, as well as 30 to 300 phr of at least one silicic acid and further blend components.

Abstract: A vulcanizable rubber mixture and its use for rubber products, which need good grip in wet or icy conditions, in particular vehicle tires and vehicle tire treads, but also technical rubber products like belts on conveyor systems, technical hoses, or vibration dampers and impact dampers. The vulcanizable rubber mixture includes from 10 to 100 phr of a block copolymer functionalized at least at one chain end (terminally) for binding to fillers, at least one filler and, optionally, additives. The block copolymer contains a statistically or microsequentially polymerized copolymer comprising a conjugated diene and an aromatic vinyl compound, and has, polymerized onto at least one end of the main chain, a terminally functionalized block of different structure to the main chain, which structure is homopolymeric or copolymeric, from 5 to 250 monomer units long, and composed of at least one of the mers of the main chain copolymer.

Abstract: A rubber mixture with improved abrasion with improved abrasion performance, in particular for pneumatic tires, has the following composition: from 30 to 100 phr of at least one diene rubber; from 0.1 to 10 phr of at least one vulcanization accelerator selected from the group consisting of: thiazole accelerators, mercapto accelerators, sulfenamide accelerators, guanidine accelerators, thiuram accelerators, dithiocarbamate accelerators, amine accelerators, thioureas, and/or other accelerators; and a vulcanization system of sulfur comprising elemental sulfur, sulfur donor and silane between 0.25 and 0.08 moles per 100 parts by weight of the rubber elastometer, whereby the free sulfur contributes in the range of 0 to 70%, the sulfur donor contributes in the range of 5 to 30%, and the silane contributes in the range of 20 to 95%.

Abstract: The invention relates to a vulcanizable rubber mixture and to its use for rubber products which need good grip in wet conditions or in icy conditions, in particular vehicle tires and vehicle tire treads, but also technical rubber products like belts on conveyor systems which can have exposure to weathering, technical hoses, or vibration dampers and impact dampers.

Abstract: The vulcanizable rubber mixture according to this invention is used for rubber products in particular vehicle tires and vehicle tire treads, but also technical rubber products like belts on conveyor systems, technical hoses, vibration dampers and impact dampers, or wire coatings. All these products benefit from the improved processability that is achieved with the invention in that the mixture comprises a polymer represented by the formula F1-A-F2, or a mixture of F1-A-F2 with an astral or radial coupling product of F1-A-units, coupled by a multivalent coupling agent; wherein F1 represents a terminal functionalization of the polymeric chain, F2 represents a terminal functionalization different from F1; and A represents the polymeric chain of a polymer formed by the copolymerization between one or more conjugated dienes with one or more aromatic vinyl monomers.

Abstract: A rubber mixture with improved abrasion with improved abrasion performance, in particular for pneumatic tires, has the following composition: from 30 to 100 phr of at least one diene rubber; from 0.1 to 10 phr of at least one vulcanization accelerator selected from the group consisting of: thiazole accelerators, mercapto accelerators, sulfenamide accelerators, guanidine accelerators, thiuram accelerators, dithiocarbamate accelerators, amine accelerators, thioureas, and/or other accelerators; and a vulcanization system of sulfur comprising elemental sulfur, sulfur donor and silane between 0.25 and 0.08 moles per 100 parts by weight of the rubber elastometer, whereby the free sulfur contributes in the range of 0 to 70%, the sulfur donor contributes in the range of 5 to 30%, and the silane contributes in the range of 20 to 95%.

Abstract: The invention relates to a sulfur-vulcanizable rubber compound, in particular for treads of tires, which contains at least one diene rubber, liquid polybutadiene with a molecular weight of 1500-10000 g/mol and a vinyl content of 15-50%, at least one polar filler, at least one high-structure black with an iodine adsorption number of 115-200 g/kg and a DBP number of 125-160 mL/100 g and at least one glyceride and/or one factice for good abrasion characteristics, good wet traction and good traction on ice and snow with good dry braking at the same time.

Abstract: The invention relates to a sulfur-vulcanizable rubber compound, in particular for treads of tires, which contains at least one diene rubber, liquid polybutadiene with a molecular weight of 1500-10000 g/mol and a vinyl content of 15-50%, at least one polar filler, at least one high-structure black with an iodine adsorption number of 115-200 g/kg and a DBP number of 125-160 mL/100 g and at least one glyceride and/or one factice for good abrasion characteristics, good wet traction and good traction on ice and snow with good dry braking at the same time.