Composition for producing an aqueous coating mass

A composition comprising the parts:

• (a) 1 to 30% by weight of a 1 to 90% by weight aqueous phosphoric acid and/or at least of one hydrogen phosphate selected from the group consisting of mono- and dihydrogen phosphates of sodium, potassium, ammonium, magnesium, calcium, aluminium, zinc, iron, cobalt and copper,
• (b) 1 to 40% by weight of at least one compound selected from the group consisting of oxides, hydroxides and oxide hydrates of magnesium, calcium, iron, zinc and copper,
• (c) 40 to 95% by weight of at least one particulate filler selected from the group consisting of glass;
• mono-, oligo- and polyphosphates of magnesium, calcium, barium and aluminium;
• calcium sulphate;
• barium sulphate;
• simple and complex silicates comprising sodium, potassium, calcium, aluminium, magnesium, iron and/or zirconium;
• simple and complex aluminates comprising sodium, potassium, calcium, magnesium and/or zirconium;
• simple and complex titanates comprising sodium, potassium, calcium, aluminium, magnesium, barium and/or zirconium;
• simple and complex zirconates comprising sodium, potassium, calcium, aluminium and/or magnesium;
• zirconium dioxide;
• titanium dioxide, aluminium oxide;
• silicon oxide;
• silicon carbide;
• aluminium nitride;
• boron nitride and silicon nitride,
• (d) 1 to 10% by weight of at least one urea compound selected from the group consisting of imidazolidine-2-on, allantoin and imidazolidinyl urea, and
• (e) 0 to 15% by weight of at least one component, which differs from the components (a) to (d).