Process for manufacturing foamed materials involving contacting a thin unbroken film of liquid resin with a gaseous blowing agent under pressure

US4120923A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Werner Kloker · Krefeld, DE
• Franz Bovender · Krefeld, DE
• Franz Gromping · Krefeld, DE
• Leonhard Goerden
• Harald Niesel · Krefeld, DE

Key dates

• Filing date: Aug 15, 1975
• Grant date: Oct 17, 1978
• Expiry date: Aug 15, 1995

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S521/917
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

Stable foams of reaction resins and/or condensation resins can be obtained by adding a blowing agent which is gaseous under normal conditions to the resin under pressure, the gas liquid interface being enlarged while dispensing with moving equipment, allowing the mixture to expand and to cure.