Continental Reifen Deutschland Gmbh

Evonik Operations Gmbh

Julia Schoeffel

Carla Recker

Norbert Mueller

Kirsten Schwekendiek

David-Raphael Dauer

Andreas Jacob

Julian Strohmeier

Thomas Kramer

Katharina Herzog

Nils Hojdis

Norbert Müller

Gesa Tarantola

Cornelia Schmaunz-Hirsch

Christine Weber

Fabian Schax

The invention relates to a process for preparing a silane, to a process for modifying a silica with the silane, and to a modified silica. The process for preparing a silane of the formula I) comprises at least the following steps:

Method for producing a silane, method for modifying a silica with the silane, and modified silica

The invention relates to a sulfur-crosslinkable rubber mixture, in particular for rubber-coating reinforcements in elastomer products, especially in vehicle tires, or inner components of vehicle tires, as well as to a vehicle tire. The rubber mixture comprises a diene rubber, an adhesive system, 10 to 200 phr silica, and 2 to 20 phr of a silane of the formula [(R)Si&#x2014;X]S(R), where residues Rare identical or different alkoxy groups, cyclic dialkoxy groups, cycloalkoxy groups, phenoxy groups, aryl groups, alkyl groups, alkenyl groups, aralkyl groups, or halides, and where X is a polar organic group containing urea, m represents the value 1 or 2, n is an integer between 1 and 8, and Ris a hydrogen atom or an acyl group comprising 1 to 20 carbon atoms.

Sulfur-crosslinkable rubber mixture and vehicle tire

The invention relates to a sulfur-crosslinkable rubber mixture, to a vulcanizate thereof and to a vehicle tire. The sulfur-crosslinkable rubber mixture contains at least the following constituents:

Sulfur-crosslinkable rubber mixture, vulcanizate of the rubber mixture, and vehicle tire

Sulfur-crosslinkable rubber mixture, vulcanizate of the rubber mixture, and vehicle tyre

The invention relates to a silane, to a rubber mixture comprising the silane and to a vehicle tire comprising the rubber mixture in at least one component. The inventive silane has the following formula I)(R)Si&#x2014;R&#x2014;X-A-Y-[A-Y-]-A-S-A-[-Y-A]Y-A-X&#x2014;R&#x2014;Si(R),wherein, according to the invention, the silane has spacer groups between the respective silyl groups and the Smoiety which have at least two aromatic groups A and the linking units X and Y, wherein the groups X within a molecule may be identical or different from each other and are selected from the groups &#x2014;HNC(&#x2550;O)&#x2014;, &#x2014;C(&#x2550;O)NH&#x2014;, &#x2014;C(&#x2550;O)O&#x2014;, &#x2014;OC(&#x2550;O)&#x2014;, &#x2014;OC(&#x2550;O)NH&#x2014;, The inventive rubber mixture comprises at least one inventive silane.

Silane, rubber mixture containing the silane and vehicle tyre having the rubber mixture in at least one component

The invention relates to a sulfur-crosslinkable rubber mixture, in particular for treads of vehicle tires, and to a vehicle tire. The rubber mixture contains at least the following components: at least one diene rubber and 10 to 200 phr of at least one silicic acid and 2 to 20 phf of at least one silane having general empirical formula I) [(R)Si&#x2014;X]S(R), wherein the residues Rwithin a molecule can be the same or different and are alkoxy groups having 1 to 10 carbon atoms or cyclic dialkoxy groups having 2 to 10 carbon atoms or cycloalkoxy groups having 4 to 10 carbon atoms or phenoxy groups or aryl groups having 6 to 20 carbon atoms or alkyl groups having 1 to 10 carbon atoms or alkenyl groups having 2 to 20 carbon atoms or aralkyl groups having 7 to 20 carbon atoms or halides and wherein X is a polar organic group containing urea and wherein m assumes the value 1 or 2 and wherein n is an integer from 1 to 8 and wherein Ris a hydrogen atom or an acyl group having 1 to 20 carbon atoms.

Growing community of inventors

Hannover, Germany

Julia Schoeffel