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New and upcoming VOC regulations are changing the high performance coatings industry. Some products are being eliminated; others are modified all while new technologies are emerging. This paper will use South Coast Air Quality Management District (SCAQMD) regulations as the basis for discussion.
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Coating formulators have demonstrated ingenuity in complying with stringent VOC regulations while keeping the same standard of high performance. Significant research and development in recent years has shown that two-component waterborne epoxies can deliver comparable performance to solvent borne epoxies, and that novel single-component waterborne coatings possess outstanding corrosion resistance and aesthetic properties.
The past 35 years have brought massive changes to the Protective Coatings industry. Increasing levels of regulatory oversight and the reduction in VOC emissions are among the more obvious impacts. However, change is also a reaction to the global trends occurring throughout the world: population growth, globalization/urbanization, climate change/global warming, the healthcare revolution and accelerated technology changes. All of these trends have and will continue to create new opportunities. How can our business model recognize and take advantage of these trends that create coatings opportunities?
Thermal Insulating Coatings reduce a facilities carbon footprint along with being an environmentally friendly product.
Vinyl coatings have long been used in the hydro industry for steel structures. As VOC regulations and product availability have changed, owners have moved toward alternative technologies to replace those systems. The intent of this information is to understand the status of vinyl technology, identify and discuss other systems that have historically been used as an alternative, and to review the possibilities of new technologies for these applications.
The US Environmental Protection Agency defines "Volatile Organic Compounds (VOC)" in 40 CFR 51.100(s) as “any compound of carbon, excluding carbon monoxide, carbon dioxide, carbonic acid, metallic carbides or carbonates, and ammonium carbonate, which participates in atmospheric photochemical reactions.”
Epoxy solvent-borne coatings are well established for protective coatings due to their outstanding adhesion and corrosion resistance. Since the passage of the Clean Air Act in 1990, coating formulators have developed alternatives to the traditional volatile organic compounds (VOCs) and hazard air pollutants (HAPs) historically used in solvent-borne protective coatings. The two main approaches employed have been high solids coatings and replacement of solvents with water.
Over the last thirty years, I have been asked by numerous people, including my children, what I do for a living. After trying to explain about corrosion, site condition assessments, coating system selection, specification writing, inspection, training, etc., I default to a standard answer that I am sure many of my readers have used - "I watch paint dry."
With a history of proven performance in architectural and industrial coatings and the ability to adhere to less-than-ideally prepared substrates, alkyd resins have remained at the forefront of coating technology for well over 50 years. With such an established history, alkyds are often thought of as old technology and synonymously associated with flammable solvents and high levels of volatile organic compounds (VOC). These historical associations are not the contemporary story.
Coatings designed for heavy duty applications in the Marine & Protective Coatings market are exposed to aggressive environments such as strong chemical solvents, marine atmospheres, UV light, abrasion, among others. Nowadays, the major part of the commercially available products that target this industry are solvent borne.
A newly developed two-component zero VOC water based epoxy topcoat, based on a solid epoxy resin dispersion cured with modified amine, offers comparable performance to solvent based and high VOC water based epoxies and exhibits good corrosion and chemical resistance. The performance properties of the new innovative zero VOC water based epoxy topcoat are reviewed and compared to solvent based and high VOC water based epoxies used in industrial maintenance applications.