C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
117/120, 6/17.3
C09D 5/14 (2006.01) B27K 3/15 (2006.01) B27K 3/50 (2006.01) B27K 3/52 (2006.01)
Patent
CA 1085106
Abstract of the Disclosure A wood treating impregnant is deposited in wood by a non-aqueous wood treating system that has the ability to control the distribution, to immobilize and to more permanently fix the impregnant in the wood. The wood is treated with a liquid carrier containing the impregnant and a reactive solvent so that both the impregnant and reactive solvent penetrate into the wood. The reactive solvent is soluble in the liquid carrier and the impregnant is substantially insoluble in the liquid carrier but soluble in the reactive solvent. After the impregnant, reactive solvent and liquid carrier have penetrated the wood, the reactive solvent is reacted to become a nonsolvent for the impregnant. Since the impregnant is no longer soluble in the reacted reactive solvent, the impregnant is immobilized in the wood and, therefore, is unable to bloom. After the reaction, the liquid carrier and optionally the reacted reactive solvent are recovered from the treated wood which is clean and need not be washed.
271662
Kozak John J.
Oberley William J.
Borden Ladner Gervais Llp
Koppers Company Inc.
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