| abstract |
The present invention relates to isocyanate-free foamable mixtures comprising alkoxysilane-terminated prepolymers preparable from di- or polyisocyanates, polyols and hydroxy- or amino-functional alkoxysilanes or from polyols and isocyanato-functional alkoxysilanes or Mixtures of prepolymers of di- or polyisocyanates, polyols and hydroxy- or amino-functional alkoxysilanes or of polyols and isocyanato-functional alkoxysilanes with liquid flame retardants and Propellants, wherein the prepolymer or the mixture of prepolymer, flame retardant and / or blowing agent at 23 ° C has a dynamic viscosity of 100 to 25,000 mPa.s, preferably 500 to 10,000 mPa.s. The isocyanate-free foamable mixtures are suitable for sealing, insulating and mounting joints, roof surfaces, windows and doors or for filling cavities. |