Alpha-alkoxysilane finished prepolymer for foams for rapid hardening spray with improved propellant gas solubility

摘要

Pre-polymer terminated in α-alkoxysilane, which can be prepared by reacting at least one polyether polyol, a polyisocyanate and an α-alkoxysilane, which has at least one reactive isocyanate group, characterized in that the polyether polyol has a weight average of 500 to 7000 g / mol, comprises propylene oxide units, and has a percentage of ethylene oxide units of 0 to 50% by weight with respect to polyether polyol.