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Quantitative measurement of the penetration of water-borne coatings in wood with confocal lasermicroscopy and image analysis

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Abstract

Due to European environmental regulations, solvent-borne wood coating systems have to be replaced by water-borne and high solid coatings. Thorough research is yet needed to replace the traditional solvent-borne systems by water-borne paints and stains for exterior wooden joinery. In this article the penetration of paint primers and wood stain base-coats (solvent-borne and water-borne as well as high solids and hybrid systems) in wood is discussed. Penetration is an important factor for the durability of a coating and thus the protection of the wood. For the image capturing a confocal scanning lasermicroscope (CSLM) was used. Penetration was measured using two methods. Further statistical analysis was done to determine the factor that influenced the penetration the most.

Zusammenfassung

Gemäß europäischer Umweltverordnungen müssen Farben auf Lösemittelbasis durch Anstriche mit Wasser als Lösemittel und hochfestem Anstrich ersetzt werden. Gründliche Forschung ist jedoch notwendig, um die traditionellen Systeme auf Lösemittelbasis zu ersetzen durch wasserlösliche Anstriche und solche für Außenverwendung. In diesem Beitrag wird die Eindringtiefe der Grundierungen und Anstrichsysteme in Holz diskutiert (Anstriche auf Lösemittelbasis, wasserlösliche Systeme sowie hochfeste und Hybridsysteme). Eindringtiefe ist ein wichtiger Faktor für die Dauerhaftigkeit einer Farbschicht und somit für den Schutz des Holzes. Für die Bilderzeugung wurde ein konfokales Lasermikroskop verwendet. Die Eindringtiefe wurde unter Anwendung zweier Methoden gemessen. Weitere statistische Analysen wurden durchgeführt, um den Faktor zu bestimmen, der die Eindringtiefe am stärksten beeinflusste.

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Acknowledgements

The authors appreciate the support given by Akzo Nobel Decorative Coatings (Vilvoorde, Belgium) for the preparation of the test products and Prof. P. Van Oostveldt (Laboratory of Molecular Biotechnology, Ghent University) for the kind permission to use the confocal lasermicroscope.

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Authors and Affiliations

  1. Laboratory of Wood Technology, Faculty of Agricultural and Applied Biological Sciences, Ghent University, Coupure Links 653, 9000, Ghent, Belgium

    J. Van den Bulcke, V. Rijckaert, J. Van Acker & M. Stevens

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  1. J. Van den Bulcke
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  2. V. Rijckaert
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  3. J. Van Acker
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  4. M. Stevens
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Correspondence to M. Stevens.

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Van den Bulcke, J., Rijckaert, V., Van Acker, J. et al. Quantitative measurement of the penetration of water-borne coatings in wood with confocal lasermicroscopy and image analysis. Holz Roh Werkst 61, 304–310 (2003). https://doi.org/10.1007/s00107-003-0394-5

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  • DOI: https://doi.org/10.1007/s00107-003-0394-5

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