SCRATCH-RESISTANT FRICTION-RESISTANT TRANSPARENT PLASTIC MATERIAL SHEET HAVING EXCELLENT OPTICAL CHARACTERISTIC, MANUFACTURE THEREOF AND WINDOW GLASS USING SAID MATERIAL

摘要

A sheet made of a transparent plastic material comprising a layer of polyurethane formed by depositing, by casting or reactive spraying on to a horizontal support plane of a reaction mixture comprising a polyol component and an isocyanate component, the face of the polyurethane layer which was facing the support during the formation of the layer comprising an acrylic polymer resulting from bringing this reaction mixture into contact, during the deposition of the reaction mixture, with a thin acrylic layer previously deposited on the support. …The sheet is employed in safety glazing, the face of the polyurethane layer comprising the acrylic polymer facing outwards in the glazing.