TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Composition: The coating additionally comprises at least one additive comprising anti-blocking agents, surfactants, antistatic agents, antioxidants and foam regulators.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The comonomer comprises at least one of the compounds comprising methacrylic acid ester, unsaturated carboxylic acids, unsaturated nitriles, unsaturated amides, vinyl esters, vinyl ethers, alpha olefins, halogenated alpha-, beta-unsaturated compounds and alpha-, beta-unsaturated aromatic compounds.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The white, coated polyester film exhibits at least one of the following properties: (a) a transparency of less than 40%, preferably less than 30%; a degree of whiteness of greater than 70, preferably greater than 80 according to Berger; a lustre on the coated side of greater than 5, preferably greater than 20, measured at a measuring angle of 20 degrees ; a shrinkage at 150 degrees C within 15 minutes in machine direction and transverse direction of less than 2.5%, preferably less than 1.5%; an adhesive force of the coated side against ethylene vinyl acetate, expressed as force that is required to separate a laminate made of the film and ethylene vinyl acetate at an angle of 180 degrees , of greater than 50 N/15 mm, preferably greater than 70 N/15 mm; a constant durability of the coating at increased temperature and humidity, expressed as force that is required to separate a laminate made of the film and ethylene vinyl acetate after 1000 hour storage at 85 degrees C and 85% relative humidity, of at least 50% of the initial value; a mechanical resistance of the coating, measured by using nanoindentation, of greater than 0.2 gigapascal, preferably greater than 0.3 gigapascal; a delamination free coating of an accelerated weathering in a xenon-weathering degree according to ISO4892, of above a period of 20000 hours; a standard viscosity of the polyester in the film, of greater than 700, preferably greater than 650; a surface roughness of the film on the coated surface of greater than 20, preferably greater than 30; an yellow index of less than 80, preferably less than 70. The polyurethane is obtained by the reaction of at least one polyhydroxy compound with at least one polyisocyanate. The polyhydroxy compound comprises polyester polyols, polycarbonate polyols or polyoxyalkylene polyols. The cross-linking agent is a component which is miscible with water or dispersible in water, which carries a reactive group that can undergo cross-linking reaction. The cross-linking agent is a polymer, which carries at least one of the groups comprising an oxazoline group, a carbodiimide group, an epoxy group, an isocyanate group or a melamine, preferably an oxazoline- or carbodiimide group. The oxazoline group containing polymer is a macromolecular compound, which is obtained by the addition polymerization of at least one oxazoline derivative of formula (I), (II) or (III) and at least one further comonomer.R1-R4 = H, halo, alkyl, aralkyl, phenyl or substituted phenyl; andR5 = non-cyclic residue having a polymerizable double bond.Preferred Composition: The coating additionally comprises at least one polymer comprising polyesters, acrylates, methacrylates, polyvinylpyrrolidone and condensation products of alkoxysilanes. The dried coating made of the polyester film exhibits a thickness of 5-500 nm, preferably 10-250 nm. EXAMPLE - Polyester raw material M80 (comprising 18 wt.% barium sulfate and having a standard viscosity of 810) was prepared as a melt and was extruded through a sheet extrusion die at 20 degrees C by keeping on a casting roller, where it was solidified to an amorphous prefilm. The prefilm was longitudinally stretched in a stretching ratio of 3.6:1 at a temperature of 95 degrees C. The longitudinally stretched film was subsequently coated with an aqueous coating dispersion (comprising Neorez R-600 (RTM: Polyurethane dispersion) (50 wt.%) and Epocros WS-700 (RTM: Oxazoline functional polymer) (50 wt.%)) with a solid content of 5 wt.% using a Meyer bar with 4.7 mu m thickness. The longitudinally stretched and coated film was dried at a temperature of 100 degrees C and then transversely stretched in a stretching ratio of 4.3:1 to obtain a biaxially oriented film. The biaxially stretched film was heat-set at 230 degrees C to obtain white, coated polyester film with a film thickness of 250 mu m.