Process for producing glass article having fragment retaining and alkali resistant coating

Claim 1

A process for applying a flexibilized epoxy coating to a glass substrate, said coating having glass fragment-retentive properties and alkali-resistance, which process comprises applying a chemically convertible liquid coating composition to the surface of a glass substrate and then converting the liquid composition to a solid, protective polymeric film by the application of energy, the chemically convertible coating composition consisting of the following ingredients: (1) an epoxy resin derived from Bisphenol A and epichlorohydrin; (2) a flexibilizing aliphatic diepoxide or polyepoxide resin having a flexible molecular structure selected from the group consisting of aliphatic hydrocarbon and polyether chains joining terminal epoxide groups; (3) a polyether-free, flexibilizing aliphatic diamine or polyamine curing agent having at least two amino groups and having a flexible molecular structure and being present in an amount ranging from 0.80 to 1.25 times the stoichiometric amount calculated from the equivalent weights of said Bisphenol-A derived epoxy resin and flexibilizing epoxy resin, said stoichiometric amount of curing agent being the minimum quantity required to completely react with all of the epoxy groups of both epoxy resins; and (4) a silane coupling agent.