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Authors
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Edelmann, M. ; Gedan-Smolka, M. ; Lehmann, D.
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Title
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Influence of various catalysts on the 1,3-diacetidine-2,4-dione (uretdione) reaction with hydroxyl groups
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Date
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19.10.2006
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Number
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14387
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Abstract
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Lowering the curing temperature for powder coatings is desirable with regard to the coating of temperature sensitive substrates. However, commercial available weather-resistant stable powder coatings need curing temperatures >180 °C. The reactivity of various catalysts on the reaction between an uretdione cross-linker and OH groups were carried out on the basis of low molecular model systems. The results were transferred to polymeric systems consisting of the reactive components of a powder coating composition. The investigations were carried out using non-isothermal and isothermal DSC measurements as well as rheological measurements of the complex melt viscosity. However, the curing reaction occurred in a two-step reaction mechanism whereas the first reaction step could by quantitatively separated applying non-isothermal DSC measurements.
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Publisher
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Progress in Organic Coatings
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Wikidata
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Citation
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Progress in Organic Coatings 57 (2006) 251-258
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DOI
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https://doi.org/10.1016/j.porgcoat.2006.09.001
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Tags
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