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Cure and Recoat Mechanism of 2K Polyurethane Topcoats
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English
Abstract
Two component urethane coatings are noted for their ability to low temperature cure. As a class, once fully cured, they are not generally noted for recoatability without surface treatment. However, with some understanding of the cure mechanism, attention to formulation variables and control of the cure process conditions, the recoatability window of 2K urethanes can sometimes be significantly widened.
The role of humidity in the cure process is perhaps of more significance than many people once thought. The benefit of introduction of humidity into the “bake” oven during winter dry conditions is clearly demonstrated in a case history for one system for a major 2K urethane finisher of large exterior plastic components.
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Authors
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Citation
McGinness, J., "Cure and Recoat Mechanism of 2K Polyurethane Topcoats," SAE Technical Paper 950803, 1995, https://doi.org/10.4271/950803.Also In
References
- McGinness, J.D. “Exterior Topcoat Applications Of Two Component Polyurethanes” 880596 , SAE Detroit, MI 1988
- Marcum, A.P. McGinness, J.D. “Primerless Polyurethane Coatings for RIM” 930053 , SAE Detroit 1993
- Pierce, R.F. “Optimization of Paint Process Parameters For Maximum Performance of a 2K Polyurethane Coating System for TPO” Advanced Coatings Technology Conference The Engineering Society Detroit, MI 1994
- Bauer, D.R. Dickie, R.A. Koenig, J.L. “Cure and Photodegradation of Two-Package Acrylic/Urethane Coatings” I & EC Product Research & Development 25 2 289 1986
- Perry, R.H. Chilton, C.H. Chemical Engineer's. Handbook 5th McGraw-Hill New York 1973
- van der Ven et.al. “Chemical Characterization of Cross-Linked-Polyurethane Films” Golton, William C. Analysis of Paints and Related Materials: Current Technologies for Solving Coatings Problems ASTM STP 1119 ASTM Philiadelphia, PA 1992
- Seneker, Stephen D. Potter, Terry A. “Solvent and Catalyst Effects in the Reaction of Aliphatic Isocyanates with Alcohols and Water” J. Coatings Tech. 63 713 19 Feb. 1991