Matthew Gadman delivered a technical paper at the 49th Waterborne, High Solids and Powder Coatings Symposium in New Orleans. He was awarded the Siltech Best Paper Award for Innovation for Unique Catalyst for Low Temperature Cure Epoxy Powder Coatings.
A unique, metal-free, non-alkaline, non-halogenated catalyst has been developed to accelerate the crosslinking reaction of epoxide and carboxyl functional resins. Allowing for significantly lower cure temperatures than conventional powder coating systems, this highly active catalyst is a stable free-flowing white powder that is safe-to-handle, environmentally friendly, and suitable for powder coatings that utilize the epoxy/carboxyl reaction. This work demonstrates the catalyst’s cure capabilities in a variety of coatings such as acrylic/glycidyl methacrylate (GMA) hybrids, polyester (PE)/bisphenol-A (BPA) hybrids, and triglycidyl isocyanurate (TGIC) crosslinked powder coatings. Experiments studying the performance against imidazole type catalysts demonstrate this novel catalyst’s superior performance in cure capabilities as well as film color and overall appearance. Furthermore, these studies include additional exploration in capabilities of accelerating the epoxy homopolymerization reaction to validate this material as a potential catalyst for pure epoxy type powder coatings.
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