Non-chemical, mechanical procedure for the devulcanization of scrap rubber and/or elastomers and apparatus therefor

US9926426B2 · kind B2 · utility

Assignee

• Entex Rust & Mitschke GmbH · DE

Inventor

• Harald Rust · Bochum, DE

Key dates

• Filing date: Jan 13, 2015
• Grant date: Mar 27, 2018
• Expiry date: Jul 2, 2035

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02W30/62
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

Method of devulcanizing rubber and/or elastomers without the need for a chemical agent, in which method the vulcanized rubber and/or elastomers are fed into a planetary roller extruder, which planetary roller extruder has a housing, a central spindle, and at least one group of planetary spindles. Mechanical and thermal stress is generated on the vulcanized rubber and/or elastomers by kneading and/or crushing the vulcanized rubber and/or elastomers using the central spindle and the planetary spindles. The mechanical and thermal stress alone is sufficient to break or destroy the molecular chains or bonds of the vulcanized rubber and/or elastomers.