Production of modified lignocellulosic materials

Details Production of modified lignocellulosic materials Production of modified lignocellulosic materials

B - Operations, Transporting

27

K

B27K 5/00 (2006.01) B27K 1/00 (2006.01) B27K 3/15 (2006.01) F26B 21/00 (2006.01)

Patent

CA 2622626

The invention relates to a method for producing modified lignocellulosic materials. Said method consists of the following steps a) the lignocellulosic material is impregnated with an aqueous composition which contains i) at least one cross-linkable nitrogen compound and ii) at least one substance which catalyses the cross-linking, b) the impregnated lignocellulosic materials are treated at higher temperatures in order to remove the water and to cross-link the cross-linkable nitrogen compound. In step b) the impregnated lignocellulosic material is treated with overheated steam. The invention also relates to lignocellulosic materials which are obtained according to said method.

La présente invention concerne un procédé pour produire des matières à base de lignocellulose modifiées, qui consiste a) à imprégner la matière à base de lignocellulose d'une composition aqueuse qui contient i) au moins un composé azoté réticulable et ii) au moins une substance catalysant la réticulation, puis b) à traiter la matière à base de lignocellulose imprégnée à température élevée, afin d'éliminer l'eau et de réticuler le composé azoté réticulable. L'étape b) du procédé comprend un traitement de la matière à base de lignocellulose imprégnée avec de la vapeur d'eau surchauffée. Cette invention concerne également les matières à base de lignocellulose obtenues selon ce procédé.

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