Method for treating a lignocellulosic material

Details Method for treating a lignocellulosic material Method for treating a lignocellulosic material

C - Chemistry, Metallurgy

04

B

C04B 20/12 (2006.01) B27N 7/00 (2006.01) C04B 20/10 (2006.01) C04B 26/02 (2006.01) C08K 3/34 (2006.01) C08L 97/02 (2006.01) D21H 25/06 (2006.01) D21H 17/04 (2006.01) D21H 17/08 (2006.01) D21H 17/52 (2006.01) D21H 17/53 (2006.01)

Patent

CA 2288879

A method of manufacturing a finished product from a length of a lignocellulosic material, such as a length of solid wood or chip board, includes the steps of impregnating the length of lignocellulosic material through its depth with an impregnating composition consisting of a mineral oil, a non-aqueous solvent for the mineral oil such as dichloromethane or super critical carbon dioxide, and a thermosetting resin and, if necessary, a catalyst therefor dissolved in the mineral oil and solvent. Thereafter, the non-aqueous solvent is removed and the product is subjected to an elevated temperature to polymerise the thermosetting resin to form the finished product.

L'invention concerne un procédé permettant de fabriquer un produit fini à partir d'une longueur de substance lignocellulosique, telle qu'une longueur de bois massif ou de carton gris. Ce procédé comporte les étapes suivantes consistant à imprégner la longueur de matière lignocellulosique d'une composition d'imprégnation contenant de l'huile minérale; un solvant non aqueux de l'huile minérale, tel que du dichlorométhane ou du dioxyde de carbone surcritique; et une résine thermodurcissable accompagnée, si nécessaire, d'un catalyseur dissout dans l'huile minérale et le solvant. Le solvant non aqueux est ensuite extrait et le produit est soumis à une température élevée en vue de polymériser la résine thermodurcissable et ce, aux fins de former le produit fini.

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