Process for recycling of thermoset materials

US6465702B1 · kind B1 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Wolfgang von Gentzkow · Kleinsendelbach, DE
• Dietrich Braun · Darmstadt, DE
• Arnd-Peter Rudolf · Schlüchtern, DE

Key dates

• Filing date: May 11, 2001
• Grant date: Oct 15, 2002
• Expiry date: May 11, 2021

Classification

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

Abstract

A process for the feedstock recycling of thermoset materials treats the material with a partially hydrogenated aromatic hydrocarbon at a temperature of from 200 to 350° C. in the presence of an amine. In the case of epoxy resin materials an amine is not needed if processing is carried out at temperatures of from 300 to 350° C.