B - Operations – Transporting – 27 – K
Patent
B - Operations, Transporting
27
K
B27K 3/34 (2006.01)
Patent
CA 2676663
A method of treating wooden parts is described in which a) the wooden parts are impregnated with an aqueous cyanamide solution and subsequently b) the impregnated wooden parts, where appropriate after drying, are subjected to a heat treatment of 130 to 250°C. Here it has surprisingly emerged that impregnation with cyanamide even in small amounts has a significantly positive influence on the performance properties of the treated wooden parts, such as high hardness, low water absorption and very good weathering stability, for example. Moreover, only small amounts of a toxicologically and environmentally unobjectionable impregnating agent are needed in order to obtain these advantageous properties.
L'invention concerne un procédé de traitement de pièces de bois, caractérisé a) en ce qu'on imprégne les pièces de bois d'une solution aqueuse de cyanamide, puis b) en ce qu'on soumet les pièces de bois imprégnées, éventuellement après séchage, à un traitement thermique de 130 à 250°C. On a constaté de façon surprenante que l'imprégnation par la cyanamide, même en petites quantités, influençait de façon nettement positive, les propriétés d'application des pièces de bois traitées, par exemple, dureté élevée, faible absorption d'eau et très bonne résistance aux intempéries. En outre, il suffit d'employer de faibles quantités d'un agent d'imprégnation acceptable sur le plan toxicologique et écologique, pour obtenir les propriétés avantageuses précitées.
Guenther Thomas
Sans Juergen
Alzchem Trostberg Gmbh
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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