Gemisch auf der Grundlage eines Polyurethanprepolymers zur Herstellung einer geschäumten Dichtungs- und Isoliermasse und eines Einkomponenten- oder Zweikomponenten-Sprühschaumstoffes

摘要

The invention relates to a mixture of components on the basis of a polyurethane prepolymer with at least one active agent or filler for the production of a foamed sealing and insulating substance or a one or two-component sprayed foam. This mixture of components may be inserted into a pressure vessel individually or as a mixture. On leaving the vessel it becomes a cross-linked polyurethane with integral active agent under the effect of damp, where said agent consists essentially of hollow microbeads. The hollow microbeads have an inner shell of a polymer of polyvinylidene chloride or acrylonitrile or their copolymer, having an outer shell (coating) of an inorganic and poorly water-soluble carbonate, sulphate or oxide, a diameter between 5 and 150 mu m and an apparent density of 0.05 to 0.7 g/cm<3>.