Patent ID: 7923389

Claim:
An intumescent body comprising: a non-intumescent polymer material providing a form of the body; and a substantially transparent coating mass applied to a surface of the polymer material, the coating mass comprising: 25 to 95 weight % of an aqueous dispersion containing polyurethane or polyacrylate; 0.5 to 10 weight % of an isocyanate or a melamine-formaldehyde; and 3 to 15 weight % of ammonium polyphosphate as a flame retarding agent; wherein the coating mass, together with the polymer material, results in an intumescent system, in which during a fire, the coating mass penetrates an interior of the polymer material creating with an aid of the polymer material, which provides an essential share of a carbon-donor component of the intumescent system, a flame extinguishing foam.