Thermal/Blue Light Induced Cross-Linking of Acrylic Coatings with Diazo Compounds.

Autor: de Zwart FJ; Homogeneous, Supramolecular and Bio-Inspired Catalysis Group, van 't Hoff Institute for Molecular Sciences (HIMS), University of Amsterdam, Amsterdam, Amsterdam, 1098 XH, The Netherlands., Wolzak LA; Akzo Nobel Car Refinishes B.V., Sassenheim, 2171 AJ, The Netherlands., Laan PCM; Homogeneous, Supramolecular and Bio-Inspired Catalysis Group, van 't Hoff Institute for Molecular Sciences (HIMS), University of Amsterdam, Amsterdam, Amsterdam, 1098 XH, The Netherlands., Mathew S; Homogeneous, Supramolecular and Bio-Inspired Catalysis Group, van 't Hoff Institute for Molecular Sciences (HIMS), University of Amsterdam, Amsterdam, Amsterdam, 1098 XH, The Netherlands., Flapper J; Akzo Nobel Decorative Coatings B.V., Sassenheim, 2171 AJ, The Netherlands., van den Berg KJ; Akzo Nobel Car Refinishes B.V., Sassenheim, 2171 AJ, The Netherlands., Reek JNH; Homogeneous, Supramolecular and Bio-Inspired Catalysis Group, van 't Hoff Institute for Molecular Sciences (HIMS), University of Amsterdam, Amsterdam, Amsterdam, 1098 XH, The Netherlands., de Bruin B; Homogeneous, Supramolecular and Bio-Inspired Catalysis Group, van 't Hoff Institute for Molecular Sciences (HIMS), University of Amsterdam, Amsterdam, Amsterdam, 1098 XH, The Netherlands.
Jazyk: angličtina
Zdroj: Macromolecular rapid communications [Macromol Rapid Commun] 2023 Nov; Vol. 44 (21), pp. e2300380. Date of Electronic Publication: 2023 Aug 24.
DOI: 10.1002/marc.202300380
Abstrakt: The thermal curing of industrial coatings (e.g., car painting and metal coil coatings) is accompanied by a substantial energy consumption due to the intrinsically high temperatures required during the curing process. Therefore, the development of new photochemical curing processes-preferably using visible light-is in high demand. This work describes new diazo-based cross-linkers that can be used to photocure acrylic coatings using blue light. This work demonstrates that the structure of the tethered diazo compounds influences the cross-linking efficiency, finding that side reactions are suppressed upon engineering greater molecular flexibility. Importantly, this work shows that these diazo compounds can be employed as either thermal or photochemical cross-linkers, exhibiting identical crosslinking performances. The performance of diazo-cross-linked coatings is evaluated to reveal excellent water resistance and demonstrably similar material properties to UV-cured acrylates. These studies pave the way for further usage of diazo-functionalized cross-linkers in the curing of paints and coatings.
(© 2023 The Authors. Macromolecular Rapid Communications published by Wiley-VCH GmbH.)
Databáze: MEDLINE
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