Continental Reifen Deutschland Gmbh

Shreyas Naik

Horst Wedekind

Dieter Jeromin

Thomas Völker

Nikolas Heinrich

Hilke Wolf

Konstantin Efimov

Nils Krüger

Inga Soetbeer

Carsten Minx

Matthias-Stephan MÜLLER

Steffen Hallmann

Thomas VÖLKER

Nils KRÜGER

Giuseppe Scifoni

Eduard A Bramer

The invention relates to a process for devulcanizing a vulcanized rubber mixture, comprising the following steps: A) providing or producing a vulcanized rubber mixture, B) comminuting the vulcanized rubber mixture to a granular material composed of vulcanized rubber particles, where the vulcanized rubber particles have a maximum particle diameter of 100 mm, C) extruding the vulcanized rubber particles produced in step B) in a twin-screw extruder at a shear rate of less than 100 s, where the temperature of the vulcanized rubber particles during extrusion is less than 200° C., to give a devulcanized rubber mixture having a temperature above 100° C., D) cooling the devulcanized rubber mixture in a further kneading unit, so as to give a devulcanized rubber mixture having a temperature in the range from 50° C. to 100° C. The invention further relates to an apparatus for performing the process and to the use of the apparatus for devulcanization of a vulcanized rubber mixture.

Method for the devulcanization of a vulcanized rubber mixture, device for carrying out the method and use of the device for the devulcanization of a vulcanized rubber mixture

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Hannover, Germany

Shreyas Naik