Method and device for the production of foam using carbon dioxide dissolved under pressure

US5789457A · kind A · utility

Assignees

• BAYER HEALTHCARE LLC · DE
• Maschinenfabrik Hennecke GmbH · DE

Inventors

• Robert Eiben · Lampertheim, DE
• Wilfried Ebeling · Neunburg vorm Wald, DE
• Hans-Michael Sulzbach · Rübhausen, DE
• Reiner Raffel · Siegburg, DE

Key dates

• Filing date: Dec 9, 1996
• Grant date: Aug 4, 1998
• Expiry date: Dec 9, 2016

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S261/26
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A method and device are described for the production of foams from two-component reactive mixtures using carbon dioxide as expanding agent, by mixing at least one of the reactive components with carbon dioxide under pressure. That mixture is then mixed with the other reactive component(s) to form a foamable reactive mixture, which is expanded and cured to form the final product. The foamable reactive mixture is expanded to ambient pressure through at least one fine-meshed screen (21a, 21b, 21c).