Process and composition for treating wood

B - Operations – Transporting – 27 – K

Patent

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Details

B27K 3/16 (2006.01) B05D 1/18 (2006.01) B05D 7/06 (2006.01) C09D 1/02 (2006.01)

Patent

CA 2442740

A process for reducing the rate of deterioration of wood that includes contacting the wood with an aqueous alkanline colloidal silicon-containing slat composition that is supersaturated with a boron-containing salt. The contacting may be at ambient or elevated temperature and pressure. The composition is an aqueous colloidal silicon-containing salt that is supersaturated with a boron-containing salt and optionally includes an aluminum salt and a preservative. The composition is made by mixing the boron- containing salt with a colloidal, aqueous mixture of a silicon-containing salt and optionally adding the aluminum salt and the preservative. The process is performed under conditions that result in a supersaturated solution of the boron-containing salt. Wood treated with the composition appears to be resistant to insects, rot, UV deterioration, fire, and other environmental insults. The wood also appears to have increased strength.

L'invention concerne un procédé pour réduire le taux de détérioration du bois, qui consiste à placer le bois au contact d'une composition siliciée coloïdale aqueuse sursaturée d'un sel contenant du bore. La mise au contact peut s'effectuer à une température et une pression ambiantes ou élevées. La composition est un sel silicié coloïdal aqueux sursaturé d'un sel contenant du bore, et comprend éventuellement un sel d'aluminium et un agent préservatif. La composition est obtenue par mélange du sel contenant du bore avec un mélange aqueux coloïdal d'un sel silicié et, éventuellement, adjonction du sel d'aluminium et de l'agent préservatif. Le procédé est réalisé dans des conditions propres à donner une solution sursaturée du sel contenant du bore. Un bois traité avec la composition de l'invention offre une plus grande résistance aux insectes, à la pourriture, à la détérioration par les rayons ultravioets, au feu et autres agressions environnementales. Le bois présente également une force accrue.

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