Abstract
The development of photocured, water based, epoxy acrylate coatings to negate the deleterious effect surface flaws have on the strength of glass is reported. Strengthening of both (a) glass rods that have been damaged in a controlled fashion and (b) production line bottles is demonstrated. In both cases strengthening was achieved whether the coatings were applied by dipping or spraying. The maximum degree of strengthening was obtained with either a preheat treatment of the coated glass before a uv cure or a thermal postcure of the coatings. The coating system included a silane coupling agent to improve the hydrolytic durability of the coatings and the concentration of this coupling agent was also found to affect the degree of strengthening achieved with the coatings.
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