B - Operations – Transporting – 27 – K
Patent
B - Operations, Transporting
27
K
B27K 3/15 (2006.01) B27K 3/52 (2006.01) B27N 1/00 (2006.01) B27N 7/00 (2006.01)
Patent
CA 2631869
The invention relates to a method for reducing the emission of formaldehyde in wood materials by applying nitrogen-containing compounds. Said method is characterized in that (i) a mixture containing at least one polyamine and optionally up to 20 percent by weight of urea relative to the mixture is applied to the wood material; (ii) polyamine is applied onto or into the chip cake or fiber cake; (iii) polyamine is applied to the coating substrate used for finishing the surface; and/or (iv) polyamine is applied to the exposed points. The polyamines have a minimum molecular weight of 500 g/mol while being provided with at least 6 primary or secondary amino groups.
La présente invention concerne un procédé pour limiter l'émission de formaldéhyde par des matériaux de construction en bois grâce à l'application de composés contenant de l'azote. Le procédé se caractérise en ce que : (i) sur le matériau de construction en bois est appliqué un mélange qui contient au moins une polyamine et éventuellement jusqu'à 20% en poids, rapportés au mélange, d'urée ; (ii) de la polyamine est appliquée dans ou sur l'aggloméré de copeaux ou de fibres ; (iii) de la polyamine est appliquée sur le substrat de revêtement employé pour la finition de surface ; et/ou (iv) de la polyamine est appliquée sur les emplacements ouverts. Selon l'invention, les polyamines ont une masse molaire d'au moins 500 g/mol et comprennent au moins 6 groupes amino primaires ou secondaires.
Beil Christian
Finkenauer Michael
Lunkwitz Ralph
Rueba Eva
Schmidt Michael
Basf Se
Robic
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