Title: New Advances in Epoxy Protective Coatings
Author: James McCarthy
Epoxy coatings are a mainstay of the Protective and Marine coatings markets. Used as intermediate coats over inorganic and organic zinc rich primers, or used as direct-to-metal primers in coating systems, epoxy coatings are widely recognized for their versatility and the excellent corrosion resistance they provide.
One drawback to current epoxy coating technology is that it requires separate packaging for the epoxy resins and the amide or amine hardeners since the chemical reaction between these materials that causes the applied film to dry, would also cause the bulk material to gel if packaged together (pot life).
Until now, single-pack epoxy coatings have been based on epoxy-ester resins, which are not as robust as true amine-cured epoxy coatings, or have been based on epoxy resins and latent hardeners, which require a bake cure and therefore are not practical for most Protective and Marine coating applications. This paper will review the features and benefits of a new epoxy coating technology that allows for true epoxy-amine curing in a single-pack product. Performance versus traditional 2k epoxy products will be compared, and environmental and convenience benefits of single-pack versus 2k packaging will be discussed.