Reactive oil/copper preservative systems for wood products

B - Operations – Transporting – 27 – K

Patent

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B27K 3/22 (2006.01) B27K 3/50 (2006.01) B27K 3/52 (2006.01)

Patent

CA 2469234

The specification describes preserved solid wood or wood composites including a copper ammonium acetate complex wood preservative and a drying oil. The wood preservative is present in the wood in an amount effective to improve the resistance of the treated wood to at least one type of decomposition, such as decay or insect attack. The drying oil is present in the wood in an effective amount to accomplish at least one useful end, such as reducing the water absorption or thickness swell of the treated wood or increasing its mechanical strength, even in a wood composite made using less binding resin than usual. Yet another aspect of the invention is a method of making the treated wood from green wood in solid or flaked form. A copper ammonium acetate complex wood preservative and optionally a drying oil are added to the green wood.

L'invention concerne des composites ligneux ou de bois massif traités, comprenant un agent de conservation pour bois à base de complexe cuivre acétate d'ammonium et une huile siccative. L'agent de conservation pour bois est contenu dans le bois dans une quantité efficace pour augmenter la résistance du bois traité, jusqu'à au moins un type de décomposition, tel que la pourriture ou les dégâts causés par les insectes. L'huile siccative est contenue dans le bois dans une quantité efficace pour atteindre au moins un objectif utile, tel que la réduction de l'absorption d'eau ou le gonflement en épaisseur du bois traité ou l'augmentation de sa résistance mécanique, même dans un composite ligneux obtenu avec moins de résine de liaison que d'ordinaire. Un autre aspect de l'invention concerne un procédé de préparation de bois traité à partir de bois vert sous forme solide ou en flocons. Un agent de conservation pour bois à base de complexe cuivre acétate d'ammonium et éventuellement une huile siccative sont ajoutés au bois vert.

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