Particulate agent for impeding the combustibility of combustible materials
AssigneeHoechst Aktiengesellschaft
InventorsHorst Staendeke, Franz-Josef Dany, Joachim Kandler, Wilhelm Adam
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Abstract
The invention relates to a particulate agent based on free-flowing pulverulent ammonium polyphosphates of the general formula 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 (a) approximately 75 to 99% by weight of ammonium polyphosphate, and (b) approximately 1 to 25% by weight of a hardened water-insoluble polycondensation product of melamine and formaldehyde encasing the individual ammonium polyphosphate particles.
Claims8
Particulate agent based on free-flowing pulverulent ammonium polyphosphates of the general formula
- 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, comprising
- (a) approximately 75 to 99% by weight of ammonium polyphosphate;
- and
- (b) approximately 1 to 25% by weight of a hardened water-insoluble polycondensation product of melamine and formaldehyde encasing the individual ammonium polyphosphate particles.
Dependencies are inferred from the claim text.