Method for bonding lignocellulosic material with...

B - Operations – Transporting – 27 – N

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B27N 3/18 (2006.01) B27N 3/00 (2006.01) B27N 3/08 (2006.01) C08L 97/02 (2006.01)

Patent

CA 2101765

Subjecting lignocellulosic components coated with an aqueous alkaline phenolic resole resin solution to carbon dioxide inhibits overpenetration of resin and improves bond strength when the coated components are heated to cure the resin by application of steam and pressure in the preparation of structural panels. Also, contact with carbon dioxide of high moisture resin coated lignocellulosic components accelerates the speed of cure and improves bond strength of panels cured under heat and pressure.

Lorsque des constituants lignocellulosiques, revêtus avec une solution de résol, alcaline, aqueuse sont exposés à du dioxyde de carbone, il n'y a pas surpénétration de la résine; en outre, on obtient une meilleure résistance d'adhésion lorsque les constituants revêtus sont chauffés pour réticuler la résine par application de vapeur et de pression lors de la préparation des panneaux de construction. De plus, le contact de constituants lignocellulosiques revêtus de résine à haute teneur en eau avec le dioxyde de carbone accélère la vitesse de réticulation et améliore la résistance d'adhésion des panneaux réticulés à haute température et sous pression.

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