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2-Component Polyurethane Topcoats - Formulating Variables Affecting Weathering Performance

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This is the final paper in a series of papers that discusses weathering performance of 2-component (2K) polyurethane topcoats used in corrosion protective coatings applications, e.g., bridges, marine, stadiums, etc., with emphasis on the key formulating variables affecting performance. 

Product Number: 41212-710-SG
Author: Edward P. Squiller, Kurt Best
Publication Date: 2012
Industries: Corrosion Monitoring and Control , Coatings
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This is the final paper in a series of papers that discusses weathering performance of 2-component (2K) polyurethane topcoats used in corrosion protective coatings applications, e.g., bridges, marine, stadiums, etc., with emphasis on the key formulating variables affecting performance. Variables such as pigment volume concentration (PVC), polyisocyanate index, and polyol selection, are compared in accelerated and natural weathering tests of various polyurethane formulations. Laboratory and commercial topcoat formulas are used to illustrate the raw material choices and how weathering performance plays out in both QUV-A and natural Florida exposure scenarios. The results are compared using SSPC Paint Specification No. 36.1

This is the final paper in a series of papers that discusses weathering performance of 2-component (2K) polyurethane topcoats used in corrosion protective coatings applications, e.g., bridges, marine, stadiums, etc., with emphasis on the key formulating variables affecting performance. Variables such as pigment volume concentration (PVC), polyisocyanate index, and polyol selection, are compared in accelerated and natural weathering tests of various polyurethane formulations. Laboratory and commercial topcoat formulas are used to illustrate the raw material choices and how weathering performance plays out in both QUV-A and natural Florida exposure scenarios. The results are compared using SSPC Paint Specification No. 36.1

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