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Characterization of one-step,chromate-free,primer systems using liquid-state Si and C NMR
Authors:A. Seth  W.J. van Ooij  P. Puomi  T. Metroke  A. Apblett
Affiliation:1. Department of Chemical and Materials Engineering, University of Cincinnati, Cincinnati, OH 45221-0012, United States;2. Department of Chemistry, Oklahoma State University, Stillwater, OK 74078, United States
Abstract:Coatings derived from organofunctional silanes have been investigated as possible replacements for the chromate-based systems used in the aerospace industry. In this study, organofunctional silanes [bis-(triethoxysilylpropyl)ethane and bis(triethoxysilylpropyl) tetrasulfide] were reacted with commercially available acrylate (ECO-CRYL™ 9790) and epoxy (EPI-REZ™ WD-510) resins, resulting in a one-step, low-VOC, chromate-free primer. Liquid-state 29Si and 13C NMR were used to determine structural characteristics of various optimized formulations.
Keywords:Liquid-state 29Si   Liquid-state 13C NMR   Chromate-free coatings   One-step primer   Low-VOC coatings
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