Halogen-free, flame retardant rigid polyurethane foam

US5776992A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Siegfried Jung · Karben, DE
• Horst Staendeke · Lohmar, DE

Key dates

• Filing date: Aug 11, 1997
• Grant date: Jul 7, 1998
• Expiry date: Aug 11, 2017

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S521/906
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to a halogen-free, flame retardant rigid polyurethane foam based on polyether-polyols and polyisocyanates, which comprises, as the polyol component, mixtures of nitrogen-free and nitrogen-containing polyether-polyols and, as the flameproofing agent, ammonium polyphosphate.