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

Subject
Color change, Test methods, Coating performance, Coatings, Silicones, Top coats, Polyurethanes, Polyurethane coatings, Weathering, Urethane, Paints, Resins, Acrylics
© 2012 Association for Materials Protection and Performance (AMPP). All rights reserved. This work is protected by both domestic and international copyright laws. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise) without the prior written permission of AMPP. Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
2012
Association for Materials Protection and Performance (AMPP)
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