Penetration of copper-ethanolamine complex in wood
OwnerRobert Hodge, H. Richardsoninventors
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Abstract
Addition of base improves the homogeneity of aqueous copper amine complex preservatives injected into wood. The base includes at least a portion of alkali metal hydroxides, alkali metal carbonates, alkali metal phosphates, alkali metal borates, and/or alkali metal pyrophosphates, the corrosivity of the composition to steel and galvanized steel is reduced, and the leach rate of the copper from the wood is also reduced.
Claims45
A method of preserving wood comprising the steps of:
- a) providing an aqueous solution comprising at least one soluble copper amine complex and at least one base in an amount sufficient to provide at least about 1 mole-equivalents of base for each mole of soluble copper amine complex;
- and
- a) injecting the solution comprising copper amine complex and the base into wood.
A method of preserving wood comprising the steps of:
- a) contacting the wood with a composition comprising a base, such that an amount of the base remains on or in the wood;
- and
- a) injecting an aqueous solution comprising at least one copper amine complex into the wood comprising the base.
A method of preserving wood comprising the steps of:
- a) providing an aqueous solution comprising at least one copper amine complex and at least one base in an amount sufficient to provide at least about 0.2 mole-equivalents of base for each mole of copper;
- wherein the base is not an amine;
- and
- a) injecting the solution comprising the copper amine complex and the base into wood.
A method of preserving wood comprising the steps of:
- a) providing an aqueous solution comprising at least one soluble copper amine complex and at least one base in an amount sufficient to provide at least about 0.01 mole-equivalents of base per liter of aqueous solution, wherein the base is not an amine;
- and
- b) injecting the solution comprising copper amine complex and the base into wood.
A method of preserving wood comprising the steps of:
- a) providing an aqueous solution comprising at least one soluble copper amine complex and at least one base in an amount sufficient to provide at least about 0.03 mole-equivalents of base per liter of aqueous solution, wherein at least a portion of the base is not an amine;
- and
- b) injecting the solution comprising copper amine complex and the base into wood.
A method of preserving wood comprising the steps of:
- a) providing an aqueous solution comprising at least one soluble copper amine complex and at least one base in an amount sufficient to provide at least about 0.05 mole-equivalents of base per liter of aqueous solution;
- and
- b) injecting the solution comprising copper amine complex and the base into wood.
Dependencies are inferred from the claim text.