公开(公告)号：US20230028139A1

公开(公告)日：2023-01-26

申请号：US17756962

申请日：2020-10-27

申请人： Continental Reifen Deutschland GmbH

发明人： Inga Soetbeer ,  Konstantin Efimov ,  Nils Krüger ,  Shreyas Naik ,  Thomas Völker ,  Hilke Wolf

IPC分类号： C08L7/00 ,  C08J11/12

摘要： 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−1, 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.