Method for the devulcanisation of a vulcanisaed rubber mixture, device for carrying out the method, as well as a rubber mixture and vehicle pneumatic tyre, comprising a component made of the rubber mixture

A method for devulcanization of a vulcanized rubber mixture, the method comprising:

• A) producing a vulcanized rubber mixture;
• B) processing the vulcanized rubber mixture into a granulate of vulcanized rubber particles;
• C) extruding the vulcanized rubber particles produced in B) in a twin-screw extruder to form a devulcanized rubber mixture;
• wherein during the extruding, at least one regeneration reagent is added to the rubber particles in the extruder, wherein the at least one regeneration reagent comprises at least one of at least one silane, at least one plasticizer, at least one aging stabilizer, or mixtures thereof;
• wherein none of the regeneration reagent added in step C) is silane,
• wherein the at least one regeneration reagent includes at least one plasticizer,
• wherein each of the at least one plasticizer is an oil having a content of polycyclic aromatics of in the range from 10% to 40% by weight, as determined by the IP346 method, the oil selected from mild extraction solvents (MES), treated aromatic extracts of treated distillate (TDAE), and naphthenic oils.

A method for devulcanization of a vulcanized rubber mixture, the method comprising:

• A) producing a vulcanized rubber mixture;
• B) processing the vulcanized rubber mixture into a granulate of vulcanized rubber particles;
• C) extruding the vulcanized rubber particles produced in B) in a twin-screw extruder to form a devulcanized rubber mixture;
• wherein during the extruding, at least one regeneration reagent is added to the rubber particles in the extruder;
• wherein the at least one regeneration includes at least one plasticizer and at least one aging stabilizer;
• wherein the at least one plasticizer includes an oil having a content of polycyclic aromatics of in the range from 10% to 40% by weight, as determined by the IP346 method, the oil selected from mild extraction solvents (MES), treated aromatic extracts of treated distillate (TDAE), and naphthenic oils;
• and
• wherein the at least one aging stabilizer is selected from the group consisting of 2,6-di-tert-butyl-4-methylphenol (BHT), 2,2′-methylene-bis(4-methyl-6-tert-butyl-phenol), 2,2′-methylene-bis(4-methyl-6-cyclohexyl-phenol), 2-mercaptobenzimidazole, N-(1,3-dimethylbutyl)-N′-phenyl-p-phenylenediamine (6PPD) and methyl-2-mercaptobenzimidazole.