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Influence of biocide pre-treatment of wood on performance of exterior coatings

L’influence du prétraitement biocide du bois sur la performance des revêtements extérieurs

Der Einfluß von Biozidvorbehandlungen auf die Leistung von externen Holzanstrichen

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Surface Coatings International Part B: Coatings Transactions

Summaries

Exterior coatings may not provide sufficient protection of wood against biodeterioration. In order to minimise the decay risk, wood can be impregnated with biocides before finishing. However, pretreatment of wood may have an effect on some important properties of surface coatings. The authors impregnated spruce wood specimens with a new preservative formulation, containing the ester of boric acid with an alkanolamine. The aim of this research was to establish a possible influence of this biocide on the performance of acrylic and alkyd stains on pre-treated wood. They studied the drying characteristics, stackability, adhesion, and permeability of the coatings. A boron-based preservative in a treated spruce wood had a pronounced influence on the drying of coatings and on the permeability of the acrylic stain. However, the influence on adhesion of the coatings was only indicated.

Résumé

Il se peut que les revêtements extérieurs ne fournissent pas au bois une protection adéquate contre la biodégradation. Pour minimaliser le risque de la pourriture le bois peut être imprégné de biocides avant la finition. Cependant le prétraitement du bois pourrait avoir des effets sur quelques propriétés importantes des revêtements de surface. Les auteurs ont imprégné des échantillons d’épinette d’une nouvelle formulation préservatrice qui contient l’ester de l’acide borique et une alkanolamine. Le but de cette étude était d’établir l’existence d’une influence éventuelle de ce biocide sur la performance des teintures acryliques et alkydiques sur du bois prétraité. Les auteurs ont étudié les caractéristiques du séchage, la gerbabilité, l’adhésion et la perméabilité des revêtements. Un agent de conservation à base de bore introduit dans un échantillon d’épinette traité avait une influence prononcée sur le séchage des revêtements et sur la perméabilité de la teinture acrylique. Cependant l’influence sur l’adhésion des revêtements était indiquée seulement.

Zusammenfassung

Holzanstriche allein sind nicht immer ein ausreichender Schutz vor Verfall durch biologische Einflüsse. Um das Verfallsrisiko zu minimisieren ist es möglich, Holz mit Bioziden vorzubehandeln. Allerdings kann diese Vorbehandlung einen Einfluß auf die Eigenschaften der Anstriche haben. Die Autoren dieser Arbeit behandelten Fichtenholz mit einer neuen Konservierungsmittelformulation, die einen Borsäureester und ein Alkanolamin enthielt. Das Ziel dieser Arbeit war, einen möglichen Einfluß dieses Biozides auf die Leistung von Acryl- und Alkylanstrichen zu untersuchen. Wir fanden, daß ein Borsäurehaltiges Konservierungsmittel einen deutlichen Einfluß auf die Trockenzeit beider Anstriche und die Durchlässigkeit des Acrylanstriches hatte. Ein Einfluß auf die Adhäsionskraft der Anstriche war nur schwach bemerkbar.

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Authors and Affiliations

  1. Biotechnical Faculty, Department of Wood Science & Technology, Rozna dolina, University of Ljubljana, Cesta VIII/34, SI-1000, Ljubljana, Slovenia

    M Pavlic, B Kricej, M Tomazic & M Petric

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  1. M Pavlic
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  2. B Kricej
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  3. M Tomazic
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  4. M Petric
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Correspondence to M Pavlic.

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Pavlic, M., Kricej, B., Tomazic, M. et al. Influence of biocide pre-treatment of wood on performance of exterior coatings. Surface Coatings International Part B: Coatings Transactions 88, 41–48 (2005). https://doi.org/10.1007/BF02699706

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