Would an acrylic-based powder coating be feasible in the transportation (DOT) field for use on railings and light pole/fixtures? We feel that we need to get at least 10 years out of a powder coating and thought acrylic might be the way to go. R.O.
While it is true that acrylic powder coatings have excellent UV resistance (resistance to sunlight exposure), they are often harder and more brittle than other powder coatings formulated for outdoor use. For instance, TGIC polyester has been used on many products used outdoors ranging from outdoor furniture, lawn and garden equipment, light fixtures, automotive trim parts, etc. It is not unusual for these products to look great after 10 years of use. Furthermore, TGIC polyester has great mechanical properties that can be useful in your application. For instance, chip resistance from stones, impact resistance from dents and mar resistance from assembly and installation mishaps. All things considered I would choose the TGIC polyester over the acrylic for your specific application. It provides both good mechanical properties and excellent UV resistance.