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US 7,923,389 B2Granted
Intumescent body
AssigneeRaymaster Holding AG
InventorsThomas Leucht, Hannes Obernosterer
Life of this patent
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Abstract
The invention relates to an intumescent body, made from a non-intumescent polymer material providing the form of the body and a coating material applied to the polymer material. According to the invention, the polymer material together with the coating material provides an intumescent system in which the polymer material forms a carbon-donor material.
Claims12
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.
5 more elements
Dependencies are inferred from the claim text.