2 октября, 2015 
Pokraskin Poor light fastness (exterior durability) of BPA type epoxy resins, due to the presence of aromatic ether linkages, limits their outdoor applications. Epoxy resins with improved weathering performance can be obtained by using aliphatic epoxy resins. One of the important epoxy resins in this class is the glycidyl ether of hydrogenated bisphenol A. These resins have lower viscosity, lower reactivity and higher cost compared to BPA epoxy resins.
Other types of aliphatic epoxy resins with glycidyl functionality are derived by copolymerization of glycidyl methacrylate with other acrylate monomers. A range of products is offered by varying the glycidyl methacrylate content, co-monomer composition and MW. These resins produce coatings with excellent exterior durability and acid etch resistance. They are reported to be widely used in
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automotive clear coats. Some examples of technically important, durable glycidyl ester type epoxy resins are depicted in Figure 2.41.
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