Flameproof polyurethanes

US4097400A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Joachim Wortmann · Kerpen, DE
• Franz-Josef Dany · Lechenich, DE
• Joachim Kandler · Lechenich, DE

Key dates

• Filing date: Apr 9, 1976
• Grant date: Jun 27, 1978
• Expiry date: Apr 9, 1996

Classification

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

Abstract

Production of flameproof polyurethanes or polyurethane foams containing an ammonium polyphosphate of the general formula: EQU H.sub.(n-m)+2 (NH.sub.4).sub.m P.sub.n O.sub.3n+1 in which n stands for a whole number averaging a value of more than 400 up to about 1000, and the ratio of m:n is approximately 1:1, as a flameproofing agent, if desired in combination with a further flameproofing substance.