PLASTIC SUBSTRATE COMPRISING A FLEXIBLE, TRANSPARENT PROTECTIVE COATING AND METHOD FOR PRODUCING SUCH A PLASTIC SUBSTRATE

摘要

The invention relates to a method for coating the surface of a plastic substrate, comprising the following steps: A. providing the plastic substrate and possibly cleaning the substrate surface to be coated; B. coating the substrate surface possibly cleaned in step A in a high-frequency plasma polymerization reactor by means of plasma polymerization, wherein in step B one or more organosilicon compounds and (a) no further compounds or (b) further compounds are used as precursor(s) for the plasma, and in step B the plastic substrate is arranged in the high-frequency plasma polymerization reactor in such a way that the plastic substrate (i) is located between the zone in which the plasma is formed and the cathode, characterized in that the method is conducted in such a way that the coating produced by the method has an elongation at fracture of = 2.5%, a yellow index determined according to ASTM D 1925 of = 3, preferably = 2.5, and a hardness to be measured by means of nanoindentation in the range of 2.5 to 6 GPa, preferably 3.1 to 6 GPa.