Transparent coating systems for improving the environmental durability of transparency substrates

摘要: Transparent substrates having at least one surface coated with a transparent coating system to improve their environmental durability are described. The consists of combination components different properties applied as separate layers the substrate. A thin layer silica-based adhesion promoter is directly substrate, followed by an organosilane primer layer, then low modulus polyurethane and, lastly, thermoset aliphatic layer. Alternatively, may also contain silanol groups or functional that can be hydrolyzed silanol, thereby making unnecessary.