Process and device for the production of a safety pane

Process for the production of a compound pane comprising a glass sheet and a transparent polyurethane-based layer thereon having energy-absorbent properties, characterized in that the polyurethane-based coating layer having energy absorbent properties is formed directly on the glass sheet by reactive injection molding, under a pressure between 2 and 10 bars, between said glass sheet and a rigid countermold, of a reactive mixtures of an isocyanate component having a viscosity under 5000 centipoises at 40 degrees C. and a polyalcohol component, with the isocyanate component containing at least one aliphatic or cycloaliphatic diisocyanate or a prepolymer of these isocyanates, with the polyalcohol component containing at least one long difunctional polyalcohol having a molecular mass between 500 and 4000 and at least one short diol as a chain extending agent and after polymerization of the reaction mixture, the countermold is removed.