Back to results
US 9,751,107 B2Granted
Two-coat single cure powder coating
AssigneeValspar Sourcing, Inc.
InventorsOwen H. Decker, Thomas E. Reno, Robert D. Breitzman, Carlos A Concha, Jeffrey D. Rogozinski, Keith M. Kirkwood
Life of this patent
Estimating the term…
Abstract
Methods and systems for coating metal substrates are provided. The methods and systems include sequential application of low flow and high flow powder coatings followed by a single heating step to provide a cured coating. The methods and systems include a marker that allows coating uniformity to be monitored and assessed during application. The described methods provide coatings with optimal surface smoothness and edge coverage.
Claims17
A method, comprising:
- providing a metal substrate;
- applying a primer coating comprising a first powder coating composition including a carboxyl-functional polyester binding resin, wherein the first powder coating composition has flow of no more than about 40 mm;
- applying a topcoat comprising a second powder coating composition with flow of at least about 40 mm;
- and
- heating the metal substrate with the primer coating and topcoat applied thereon in a single step, without multiple heating cycles, to form a continuous corrosion-resistant coating with 20-degree gloss of at least 50%.
2 more elements
Dependencies are inferred from the claim text.