Continental Aktiengesellschaft

Continental Reifen Deutschland Gmbh

Joachim Dumke

Andre Du Bois

Reinhard Teves

Hajo Weinreich

Christian Struebel

Dietmar Soehnen

Wolfgang Loreth

Annette Stark

Anja Schneider

Dietmar Söhnen

Christian Stübel

Sulfur-vulcanizable rubber mixture without aromatic process oils, in particular for the tread rubber of vehicle pneumatic tires, containing at least one diene rubber, carbon black, mineral oil plasticizer, and resin. A vehicle pneumatic tire with a tread rubber that is composed at least partially of a rubber mixture of this type vulcanized with sulfur is also disclosed. To improve the chipping and chunking behavior, the rubber mixture can contain at least one diene rubber, 5-100 phr of at least one carbon black with an iodine adsorption number of 100-180 g/kg and a DBP number of 100-150 cm/100 g, 5-80 phr of at least one mineral oil plasticizer that has a content of polycyclic aromatic compounds determined with the DMSO extract according to the IP 346 method of less than 3% by weight relative to the total weight of the mineral oil plasticizer, and 5-30 phr of at least one resin with an average molecular weight determined with GPC of less than 400 g/mol and a softening point (ring and ball according to ASTM E 28) of less than 40&#xb0; C.

Rubber mixture and tires

The invention pertains to a sulfur cross-linkable unvulcanized rubber mixture for the manufacture of treads, in particular for winter tires. The rubber mixture contains polyisoprene, polybutadiene and styrene-butadiene copolymer as well as further fillers and additives. In order to prepare vehicle pneumatic tires which exhibit excellent traction on ice and snow while at least maintaining their wet-gripping ability, the rubber mixture preferably contains, relative to 100 parts of total rubber, 20-100 parts by weight cis-1,4 polyisoprene; 0-65 parts by weight polybutadiene with a cis content of greater than about 90 mole %; and 0-65 parts by weight solution-polymerized styrene-butadiene copolymer; as well as 65-120 parts by weight silicic acid.

Unvulcanized rubber mixture for treads of vehicle pneumatic tires

A pneumatic vehicle tire has a carcass with reinforcing members and radially inwardly positioned beads and a tread strip with a tread positioned radially outwardly on the carcass. An additional layer is placed on the tread strip for reinforcing the tread. The additional layer is made of a rubber or thermoplastic material. The additional layer has a tensile modulus of elasticity that is greater than the tensile modulus of elasticity of the tread strip. The additional layer is provided with reinforcement elements.

Pneumatic tire with an exterior additional layer on the tread strip for

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Lehrte, Germany

Joachim Dumke