Aqueous metal coordination compounds as protective coatings for glass

A method of increasing the abrasion resistance and chemical durability of a glass article comprising contacting the surface of said article while at an elevated temperature of at least 425.degree. C., with an aqueous solution having therein MX.sub.6.sup.-2 ions at a concentration of about 2 to about 50 weight percent wherein M is titanium, tin or zirconium and X is a halogen, the temperature of the glass being sufficient to immediately and substantially completely vaporize the water content of said solution and above the decomposition temperature of said MX.sub.6.sup.-2, and thereafter applying to said surface an organic material selected from the group consisting of polyethylene, polypropylene, polystyrene, polyurethane, and fatty acids and their derivatives and mixtures thereof.

A method of increasing the abrasion resistance and chemical durability of a glass article comprising applying to the surface of said article while at an elevated temperature an aqueous solution of about 2 to about 50 weight percent of a coordination compound, said compound being represented by the formula Y.sub.2 MX.sub.6 wherein Y is an alkali metal, hydrogen or ammonium, M is titanium, tin or zirconium and X is a halogen, the temperature of the glass being sufficient to immediately and substantially completely vaporize the water content of said solution and above the decomposition temperature of said coordination compound, and thereafter annealing said article so treated at a temperature of at least about 425.degree. C., to thereby decompose said coordination compound on the surface of said glass article and thereafter applying to said annealed article an organic material selected from the group consisting of polyethylene, polypropylene, polystyrene, polyurethane, and fatty acids and their derivatives.

A method of increasing the abrasion resistance and chemical durability of a glass article comprising applying to the surface of said article while at an elevated temperature an aqueous solution containing about 2 to about 50 weight percent coordination compound having the general formula of Y.sub.2 MX.sub.6 wherein Y is an alkali metal, hydrogen or ammonium, M is titanium, tin or zirconium and X is a halogen, and an ammonium halide, the temperature of the glass being sufficient to immediately and substantially completely vaporize the water of said aqueous solution, the temperature of the glass being at least about 425.degree. C., and thereafter annealing said article so treated at a temperature of at least about 590.degree. C., and thereafter applying to said surface an organic material selected from the group consisting of polyethylene, polypropylene, polystyrene, polyurethane, and fatty acids and their derivatives and mixtures thereof.