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Dr. Naser Pourahmady, Lubrizol Advanced Materials
Self-Healing Thermoplastic Polyurethane Coatings and Their Application Performance
Meeting the Military’s Needs for High Performance Powder Topcoats
Speakers are Subject To Change
Dr. Morgan Sibbald
Thermoplastic polymers in general, and polyurethanes in particular, are well known for their inherent smart behavior as self-healing triggered by heat. This property of thermoplastic polyurethanes has been utilized in a variety of applications for more than a decade. Unfortunately, the self-healing behavior in common urethane coatings is diminished or eliminated when the polymer is crosslinked or structurally modified to enhance other physical properties such as chemical resistance or tensile strength. In this presentation, we will discuss the results of our work to obtain a balance of desired mechanical and physical properties in urethane coatings, while maintaining their self-healing property. New polyurethane/urea coatings with excellent chemical and wear resistance will be discussed. The effect of chain-entanglement molecular weight, crosslink-density, and soft-segment on self-healing property of water-borne urethane coatings will also be discussed.
"Advances in Smart Coatings" - Dr. Mark Soucek
"Introduction to Epoxy Coatings Technology"
- Ben Carlozzo
For decades, the U.S. Department of Defense has recognized the potential benefits of powder coatings and has encouraged their use in the military market. Powder coatings may offer low VOCs, excellent corrosion resistance, and superior weatherability. Until recently, however, there were no commercially-available coatings that were qualified to meet the military specification MIL-PRF-32348 Type III. This is a chemical resistant powder topcoat for use on ground vehicles and support equipment. The requirements of chemical resistance, ultra-low gloss, and exterior durability made this a challenging specification for coatings manufacturers to meet. In response to this challenge, the DoD issued a request for proposals and provided government funding to accelerate innovation. Sherwin-Williams responded to the DoD need and formed a team of industry, academic, and military partners to create a solution. Leveraging its experience in liquid-applied and powder coatings, the Sherwin-Williams team successfully developed a technology to meet the military specification. The Sherwin-Williams powder topcoat is based on a unique polymer blend formulated with fillers and pigments. Microscopy and micro-Raman spectroscopy were key to help elucidate the material-property relationships that produced a high performance system. The technical approach, characterization studies, and examples of demonstrations to validate performance will be presented.