Foaming of blowing agent containing polymers through the use of microwaves

US12233582B2 · kind B2 · utility

Assignee

• Evonik Operations GmbH · DE

Inventors

• Thomas Richter · Wauseon, US
• Christoph Seipel · Babenhausen, DE
• Christian Traßl · Warmensteinach, DE
• Andreas Liebe · Darmstadt, DE
• Florian Becker · Clamart, FR
• Vincent Ma Junyong · Darmstadt, DE

Key dates

• Filing date: Dec 19, 2019
• Grant date: Feb 25, 2025
• Expiry date: Nov 16, 2040

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29C2035/0855
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

(Rigid) foams can be produced by heating a blowing agent containing polymers through the combination of thermal energy with irradiation by microwaves.