Weathering performance of 2-component polyurethane topcoats used in corrosion protection applications, e.g. bridges, marine, stadiums, etc., is discussed with emphasis on some key formulating variables. Variables such as isocyanate index and resin selection are compared in an accelerated weathering study using various polyurethane topcoats. The results are referenced to SSPC polyurethane coating specifications which are often used in the industry to define performance criteria.

Subject
Polyisocyanate, Coating performance, Silicones, Top coats, Isocyanates, Gloss, Polyurethanes, Polyurethane coatings, Weathering, Coating formulation, Corrosion protection, Urethane, Paints
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2008
Association for Materials Protection and Performance (AMPP)
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