Micronized wood preservative formulations
AssigneeOsmose, Inc.
InventorsRobert M. Leach, Jun Zhang
Life of this patent
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Abstract
The present invention provides wood preservative compositions comprising micronized particles. In one embodiment, the composition comprises dispersions of micronized metal or metal compounds. In another embodiment, the wood preservative composition comprises an inorganic component comprising a metal or metal compound and organic biocide. When the composition comprises an inorganic component and an organic biocide, the inorganic component or the organic biocide or both are present as micronized particles. When compositions of the present invention are used for preservation of wood, there is minimal leaching of the metal and biocide from the wood.
Claims29
A method for preserving a wood product comprising the step of contacting the wood product with a wood preservative composition comprising:
- (a) a dispersion in water of micronized particles of basic copper carbonate, copper carbonate or copper hydroxide between 0.001 and 25 microns and (b) one or more organic biocides selected from the group consisting of tebuconazole, alkyldimethylbenzylammonium chloride, dimethyldidecylammonium chloride, dimethyldidecylammonium carbonate, and dimethyldidecylammonium bicarbonate, wherein the micronized particles of the basic copper carbonate, copper carbonate or copper hydroxide are distributed within the wood product and render the wood product resistant to fungal decay.
A method for preserving a wood product comprising the steps of (a) adding water to a concentrated wood preservative composition comprising a dispersion in water of micronized particles of copper carbonate or basic copper carbonate between 0.001 and 25 microns to prepare a treating fluid and (b) vacuum and/or pressure treating a wood product with the treating fluid, wherein the micronized particles of the basic copper carbonate or copper carbonate are distributed within the wood product and render the wood product resistant to fungal decay.
A method for preserving a wood product comprising the steps of contacting the wood product with a wood preservative composition comprising a dispersion in water of a milled copper carbonate or basic copper carbonate with a particle size of between 0.001 and 25 microns, wherein the micronized particles of the basic copper carbonate or copper carbonate are distributed within the wood product and render the wood product resistant to fungal decay.
A method for preserving a wood product comprising the step of contacting the wood product with an aqueous wood preservative composition comprising:
- (a) a dispersion in water of micronized particles of copper carbonate or basic copper carbonate milled to between 0.05 and 1 microns;
- (b) dimethyldidecylammonium carbonate;
- and (c) dimethyldidecylammonium bicarbonate, wherein the micronized particles of the basic copper carbonate or copper carbonate are distributed within the wood product and render the wood product resistant to fungal decay.
A method for preserving a wood product comprising the step of contacting the wood product with an aqueous wood preservative composition comprising:
- a dispersion in water of micronized particles of copper carbonate or basic copper carbonate between 0.05 and 1 microns, wherein the micronized particles of the basic copper carbonate or copper carbonate are distributed within the wood product and render the wood product resistant to fungal decay.
A method for preserving a wood product comprising the step of contacting the wood product with an aqueous wood preservative composition comprising:
- (a) a dispersion in water of micronized particles of copper carbonate or basic copper carbonate between 0.05 and 1 microns;
- and (b) tebuconazole, wherein the micronized particles of the basic copper carbonate or copper carbonate are distributed within the wood product and render the wood product resistant to fungal decay.
A method for preserving a wood product comprising the step of contacting the wood product with an aqueous wood preservative composition comprising:
- (a) a dispersion in water of micronized particles of copper carbonate or basic copper carbonate milled to between 0.05 and 1 microns;
- and (b) tebuconazole, wherein the micronized particles of the basic copper carbonate or copper carbonate are distributed within the wood product and render the wood product resistant to fungal decay.
Dependencies are inferred from the claim text.