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INNOVATIONS PRODUCTS FINISHING 52 NOVEMBER 2015 — pfonline.com New and Updated Finishing Technology JESS LARKIN Assistant Editor jlarkin@pfonline.com THE DETAILS Application Method Conventional air, airless, or air-assisted spray Flash Time 5 minutes Time at Temp 30 minutes Oven Temp 180° F Viscosity 22–28 sec # 2 EZ Zahn Cup (77°F) Dry Film Per Coat 1.5–2.0 mils Shelf Life 12 months (closed container) Solids % by Weight 59.2 +/- 2 % Solids % by Vol 41.4 +/- 2 % PPG's Spectracron SEP Primer Reduces Flash Times Cuts drying while also maintaining corrosion resistance. Watching paint dry just got more exciting, especially if you coat in the agriculture, construction and heavy equipment industries. PPG's Spectracron SEP wet-on-wet epoxy primer—designed specifcally for heavy-duty OEMs—is formulated to reduce fash times (drying times) to only two minutes. Industry-typical fash times are between 10 and 45 minutes, and there is a growing need for fash times below fve minutes to increase throughput and decrease paint costs. Shorter fash times means lower costs, simplifed stock and reduced inventory. "There is a need to shorten these fash times much below 10 minutes. We're starting to see a lot more of fve minutes, two minutes," Scott Laney, PPG's liquid coatings product manager, says. "You have to create a product to ft the specifc applica- tion conditions of the facility. That was why this product is innovative; it had a very short wet-on-wet fash time." But PPG had to also consider product performance, as well as the selection of raw materials that must be incorporated. The primer was formulated with performance in mind, Laney says, with the goal of increasing production rates without sacrifcing the quality of the fnish. This primer had to meet the require- ments of the applicator, while also maintaining performance. "Keeping the corrosion resistance is always the key," Laney says. "Though you try to formulate the product to meet these application conditions, you also have to maintain the perfor- mance of the product that you're trying to improve. You can't ft the application with detrimental efects to performance." PPG's Spectracron SEP is also designed to provide a fnish without solvent-pop or soak-in issues. Typically, reduced fash Supplier Information: PPG Industries Inc. Pittsburgh, PA 888-774-2001 ppgindustrialcoatings.com times cause "pimpling" in the fnish, because the solvents do not escape from the flm prior to the second coat. "You overcome this by using diferent formulations and techniques to eliminate, avoid and improve this pop- resistance and level of sag," Laney says. "To get suficient coverage of a primer or topcoat, you need a good product with robust application that provides good sag and pop- resistance at a very high flm thickness." Spectracron SEP also includes a number of operational benefts, including reduced VOC emissions without the use of exempt solvents, which are a list of solvents that coatings companies allow to be put into the paint that don't have any efect on VOCs. The primer is available in green or buf colors, as well as specialty colors for specifc applications.