Two-component - on-site foaming system and its use for the foaming of openings for the purpose of fire protection

摘要

Two-component - on-site foaming system for the production of an intumescent fire protection foam having a density of less than 200 kg / m³ the fire resistance endurance and an increased, with a polyol - component (a), the at least one polyol, a catalyst for the reaction of the polyol with the polyisocyanate, water or a blowing agent on the basis of a compressed or liquefied gas as a foaming agent and at least one intumescent material based on an acid, a carbon-supplying compound and a gas-ners, and a polyisocyanate - component (b), the at least one polyisocyanate, characterized in that the polyol - component (a) 3 to 40 w -% of at least one polyesterpolyol, 3 to 30 w -% of at least one polyol, 5 to 20 w -% at least of a brominated polyol having a functionality of 2 to 5 and an oh - number of 100 to 500, 5 to 30 w -% of at least one acid, 1 to 20 w -% of the carbon-supplying compound, 1 to 10 w -% of at least one melamine compound as a gas former, 10 to 40 w -% of expandable graphite and at least one..