Environmentally friendly wood preservative system based on polymerized tannin resin-borix acid for outdoor appliations

Thévenon Marie-France, Tondi Gianluca, Pizzi Antonio. 2010. Environmentally friendly wood preservative system based on polymerized tannin resin-borix acid for outdoor appliations. Maderas. Ciencia y Tecnología, 12 (3) : pp. 253-257. Ecole des Sciences et Technologies du Bois. 7, Rabat, Maroc, 22 March 2010/25 March 2010.

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Abstract : Boron compounds are used as wood preservatives as they are both fungicide and insecticide, relatively inexpensive and environmentally acceptable. Nevertheless, in the field of wood protection, borates are only used for indoor non-exposed applications or in association with other biocides, due to their main disadvantage of being readily leachable from treated wood. To overcome this problem, boric acid was fixed into wood with condensed tannins and hexamine through a non-formaldehyde emission polymer network. Treated mixtures were tested with different proportions of mimosa tannins and hexamine, with and without co-added boric acid. The treated beech samples were leached and tested according to European Standard EN 113 against Pycnoporus sanguineus in tropical conditions. The systems had minimal boron depletion and good fungal decay efficacy, meeting the efficacy requirements of EN 113. Thus, these associations could be envisaged to treat timber with insufficient natural durability for above ground outdoor use, and for a long service-life of the wooden commodities. (Résumé d'auteur)

Mots-clés Agrovoc : Bois, Acide borique, Fagus sylvatica, Tannin, Produit de préservation du bois, Pycnoporus, Composé hétérocyclique, Bois tropical

Mots-clés complémentaires : Pycnoporus sanguineus, Hexamine

Classification Agris : K50 - Processing of forest products
J12 - Handling, transport, storage and protection of forest products

Champ stratégique Cirad : Hors axes (2005-2013)

Auteurs et affiliations

  • Thévenon Marie-France, CIRAD-PERSYST-UPR Bois tropicaux (FRA)
  • Tondi Gianluca, ENSTIB (FRA)
  • Pizzi Antonio, ENSTIB (FRA)

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Source : Cirad - Agritrop (

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