Tempered safety-glass that is provided with a scratch-resistant, porous SiO2 antireflective layer and method for producing the same

摘要

The invention relates to a tempered safety-glass that is provided with a scratch-resistant, porous SiO2 antireflective layer and to a method for producing the same. The inventive safety glass is obtained by coating a glass that is commonly used for producing tempered safety glass with a colloidal dispersion, drying the coated glass, heating it to temperatures of at least 630 DEG C to remove the organic components and to temper the glass and then thermally quenching it. The colloidal dispersion is obtained by hydrolytically condensing silicon compounds of the general formula RaSiX4-a, in which the residues are the same or different, R is an organic residue, X is a hydrolyzable residue and a is 0, 1 or 2. The colloidal dispersion also contains organic polymers that carry one or more OH and/or NH groups. The average molecular weight of said polymers ranges between 200 and 500,000 and the molar ratio of the polymer to the silicon compound ranges between 0.1 mmol/mol Si compound and 100 mmol/mol Si compound.