A new adhesive for fiber boards

C - Chemistry – Metallurgy – 09 – J

Patent

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Details

C09J 197/02 (2006.01) C08L 97/02 (2006.01) D21B 1/00 (2006.01) D21J 1/00 (2006.01)

Patent

CA 2277364

An adhesive binder for bonding together lignocellulosic particles, fibers and flakes of vegetable origin to form particle boards, fiber boards, flake boards and similar wood-based products, comprising a solubilized fraction obtained by enzymatic treatment of fibrous, lignocellulosic raw materials. The present binder can be obtained by treating fibrous lignocellulosic raw material with a hydrolytic enzyme in an aqueous medium, recovering the solubilized material of the enzymatic treatment, forming an aqueous suspension containing said material and an oxidase, and oxidizing said material in the presence of said oxidase by introducing oxygen-containing gas into the suspension. This method thus produces an increased amount of a water-soluble fraction containing carbohydrates, extractives and lignin useful as an adhesive binder.

Liant adhésif pour assemblage de copeaux lignocellulosiques, de fibres et fragments d'origine végétale, en vue de former des panneaux de copeaux, fibres et fragments et autres produits similaires à base de bois, comprenant une fraction solubilisée obtenue par traitement enzymatique de matières premières fibreuses lignocellulosiques. Le liant en question peut être élaboré par traitement des matières premières fibreuses lignocellulosiques avec une enzyme hydrolytique dans un milieu aqueux, puis par récupération du matériau solubilisé suite au traitement enzymatique, formation d'une suspension aqueuse renfermant ledit matériau et une oxydase, et oxydation de ce matériau en présence de l'oxydase par introduction dans la suspension d'un gaz qui contient de l'oxygène. Ce procédé accroît la fraction hydrosoluble renfermant les hydrates de carbone, les matières extractibles et la lignine, ce qui est utile pour donner un liant adhésif.

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