Lignocellulosic composites

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 97/02 (2006.01) B27K 5/00 (2006.01) B27N 1/00 (2006.01) B27N 9/00 (2006.01) C09K 21/00 (2006.01)

Patent

CA 2408760

Lignocellulosic-based composite products containing a pesticidal amount of calcium borate is resistant to attack by wood destroying fungi and insects. The preferred calcium borates are the calcium polytriborates having a CaO:B2O3 molar ratio of about 2:3 and calcium hexaborates, having a CaO:B2O3 ratio of 1:3. Composites can be produced by combining the calcium borate with particles of the lignocellulosic material and an adhesive resin, and forming the composite, generally with heat and pressure.

Les produits composites à base de lignocellulose, contenant une quantité pesticide de borate de calcium, résistent à l'attaque par les champignons et les insectes détruisant le bois. Les borates de calcium préférés sont les polytriborates de calcium possédant un rapport molaire CaO :B¿2?O¿3? d'environ 2 :3 et les hexaborates de calcium possédant un rapport CaO :B¿2?O¿3? d'environ 1 :3. Les composites de l'invention peuvent être produits par la combinaison du borate de calcium avec des particules de matière lignocellulosique et d'une résine adhésive, le composite étant formé généralement à l'aide de chaleur et de pression.

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