Summaries
Spruce substrates of radial and tangential texture were treated successfully with isocyanate-based and resorcinol-based primers to improve the adhesion of water-borne paint in dry and wet conditions. Microscopic evidence showed that the wet adhesion of the acrylic or hybrid base coats was severely impaired by water ingress to these porous and brittle layers. Direct application of the finishing coat on wood, especially on that treated with primers, proved advantageous over base-coat/finishing-coat systems in terms of wet adhesion.
Résumé
Supports de spruce de texture radiale et tangentiale ont été traités avec succès par primaires à base d’isocyanates où de résorcinol pour améliorer l’adhérence de peintures hydrodiluables pendant des conditions sêches ou humides. L’évidence microscopique met en évidence que l’adhérence aux supports de bois humide des peintures acryliques ou hybrides a été gravement mise en question par l’entrée d’eau à ces couches perméables et friables. L’application directe de la couche de finition sur le bois, particulièrement sur le bois qui a été traité de primaires, se montre avantageuse en termes d’adhérence par les conditions humides que les systèmes couche de fond/couche de finition.
Zusammenfassung
Substrate aus Fichte mit radialer und tangentieller Struktur wurden erfolgreich mit Isocyanat- und Resorcinolgrundierung behandelt um die Adhäsion von wäßrigen Acrylen unter trockenen und nassen Bedingungen zu verbessern. Mikroskopische Untersuchungen zeigten daß die Naß-Adhäsion von Acryl- und Hybridgrundierungen durch das Eindringen von Wasser in die porösen und spröden Lagen deutlich geschädigt wurde. Die direkte Anwendung von einem Deckanstrich, insbesondere an grundiertem Holz, bot bessere Naß-Adhäsion gegenüber Systemen ohne Grundierung
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Turkulin, H., Richter, K. & Sell, J. Adhesion of water-borne acrylic and hybrid paint on wood treated with primers. Surface Coatings International Part B: Coatings Transactions 85, 273–280 (2002). https://doi.org/10.1007/BF02699550
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DOI: https://doi.org/10.1007/BF02699550