Particulate agent for impeding the combustibility of combustible materials

US4467056A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Horst Staendeke · Lohmar, DE
• Franz-Josef Dany · Lechenich, DE
• Joachim Kandler · Lechenich, DE
• Wilhelm Adam · Neu-Isenburg, DE

Key dates

• Filing date: Dec 8, 1980
• Grant date: Aug 21, 1984
• Expiry date: Dec 8, 2000

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S521/907
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a particulate agent based on free-flowing pulverulent ammonium polyphosphates 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 is an integer having an average value of from approximately 20 to 800 and the ratio of m to n is approximately 1, for impeding the combustibility of combustible materials. The agent is comprised of PA0 (a) approximately 75 to 99% by weight of ammonium polyphosphate, and PA0 (b) approximately 1 to 25% by weight of a hardened water-insoluble polycondensation product of melamine and formaldehyde encasing the individual ammonium polyphosphate particles.