Dimensionally stable wood composites and methods for making...

Details Dimensionally stable wood composites and methods for making... Dimensionally stable wood composites and methods for making...

B - Operations, Transporting

27

N

B27N 1/00 (2006.01) C08K 5/098 (2006.01) C08L 61/10 (2006.01) C08L 97/02 (2006.01) C09J 161/10 (2006.01)

Patent

CA 2406170

The invention is a wood composite including wood particles, a binder, at least one wood stabilizer, and optionally other ingredients. Examples of the wood stabilizer are an ammoniacal wood stabilizer or ammoniacal copper dimethyl glyoxime. The wood stabilizer is present in an amount effective to reduce the swelling value of the wood composite to less than that of an analogous wood composite not treated with the wood stabilizer. A method for making wood composites and the product of that method are also disclosed. The method includes providing green wood particles and applying to them a wood stabilizer as described above, preferably without an intervening drying step. It is contemplated that the wood stabilizer can be applied in an amount effective to at least substantially preserve the resulting wood composite against at least one of rot, termites, and carpenter ants. While or after applying the stabilizer, a water repellant material is applied to the wood particles. The treated wood particles are then formed into a wood composite.

L'invention concerne un composite de bois y compris des particules de bois, un liant, au moins un stabilisant pour bois et facultativement d'autres ingrédients. Un stabilisant ammoniacal pour bois ou un glyoxime de diméthyle de cuivre ammoniacal sont des exemples de stabilisant pour bois. Ledit stabilisant est présent en une quantité efficace pour réduire la valeur de gonflement du composite de bois à une valeur inférieure à celle d'un composite de bois similaire non traité avec le stabilisant pour bois. Ladite invention concerne aussi un procédé de fabrication de composites de bois et le produit de ce procédé. Ce dernier consiste à fournir des particules de bois vert et à leur appliquer un stabilisant pour bois comme susmentionné, de préférence sans inclure une étape de séchage. On peut appliquer le stabilisant pour bois en une quantité efficace pour préserver au moins complètement le composite de bois résultant de la pourriture, des termites et des fourmis charpentières. Pendant ou après l'application du stabilisant, on applique une matière hydrofuge e aux particules du bois, les particules ainsi traitées formant alors un composite de bois.

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