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US 6,287,708 B1Granted
Adhesive for fiber boards
AssigneeNeste Chemicals Oy
InventorsLiisa Viikari, Anneli Hase, Pia Qvintus-Leino, Kirsi Kataja, Simo Tuominen, Lars Gädda
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AssigneeNeste Chemicals Oy
InventorsLiisa Viikari, Anneli Hase, Pia Qvintus-Leino, Kirsi Kataja, Simo Tuominen, Lars Gädda
Estimating the term…
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 solublized 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 supension. This method thus produces an increased amount of a water-soluble fraction containing carbohydrates, extractives and lignin useful as an adhesive binder.
An adhesive binder for bonding together wood-based products, comprising a phenoloxidase enzyme and a solubilized faction obtained by treatment of fibrous, lignocellulosic raw materials with a hydrolytic enzyme.
A process for preparing an adhesive binder composition, which comprises the steps of
A process for the preparation of wood-based products, comprising the steps of bonding particles, fibers or flakes of vegetable origin together with an enzymatically oxidized and polymerized water-soluble fraction containing carbohydrates and lignin and obtained by enzymatic peeling of fibrous, lignocellulosic raw materials with a hydrolytic enzyme, said enzymatical oxidation and polymerization being carried out with a phenoloxidase.
A wood-based product, comprising lignocellulosic particles, fibers or flakes of vegetable origin mixed with and bonded together, in the presence of a phenoloxidase, with an oxidized and polymerized water-soluble carbohydrate/lignin fraction obtained by enzymatic peeling of fibrous, lignocellulosic raw material with a hydrolytic enzyme.
Dependencies are inferred from the claim text.