Treatment of wood for the production of building structures and other wood products
View Patent ↗Compositions and devices for the production of treated wood products are disclosed. A moisture exchange container for treating a plurality of wood pieces with a chemical formulation of interest is described. Also, an adhesive suitable for gluing wood pieces that have been treated, or that are going to be treated, with a chemical formulation of interest is described. Also disclosed are methods and systems using the devices and compositions of the present invention, and treated wood products.
1. A method of producing a wood product, comprising:
contacting a plurality of wood pieces with a treatment formulation, the treatment formulation comprising:
water;
at least one of a pesticide, a fungicide, or an insecticide;
a preservative selected from at least one of the following: chromated copper arsenate, borates, azoles, triazoles, alkaline copper, alkaline copper quaternary salts, alkaline copper zinc arsenates, tebuconazole, quaternary ammonium compounds, isothiazolones, and carbamates; and
a water repellent; and
gluing the wood pieces together with an adhesive, the adhesive comprising:
a polyvinyl acetate resin; and
at least about 15% by weight of an isocyanate cross-linking agent.
2. The method of claim 1 , wherein contacting the wood pieces with the treatment formulation is performed after gluing the wood pieces together.
3. The method of claim 1 , wherein contacting the wood pieces with the treatment formulation is performed prior to gluing the wood pieces together.
4. The method of claim 1 , wherein contacting the wood pieces with the treatment formulation comprises subjecting the wood pieces to at least one of the following: positive pressure; a vacuum; and elevated temperature.
5. The method of claim 4 , wherein contacting the wood pieces with the treatment formulation comprises the following ordered steps:
subjecting the wood pieces to a vacuum;
contacting the wood pieces with the treatment formulation; and
subjecting the wood pieces to positive pressure while the treatment formulation is in contact with the wood pieces.
6. The method of claim 5 , wherein applying positive pressure to the wood pieces further comprises subjecting the wood pieces to elevated temperature.
7. The method of claim 1 , further comprising:
drying the wood pieces.
8. The method of claim 1 , wherein the preservative comprises tebuconazole.
9. The method of claim 1 , wherein the adhesive comprises about 80% to about 85% by weight of polyvinyl acetate resin, and about 15% to about 20% by weight of isocyanate cross-linking agent.
10. The method of claim 1 , wherein the adhesive comprises about 80% to about 84% by weight of polyvinyl acetate resin, and about 16% to about 20% by weight of isocyanate cross-linking agent.
11. The method of claim 1 , wherein the adhesive comprises about 83% to about 84% by weight of polyvinyl acetate resin, and about 16% to about 17% by weight of isocyanate cross-linking agent.
12. The method of claim 1 , wherein the isocyanate cross-linking agent comprises a diphenylmethane diisocyanate (MDI).
13. A method of producing a wood product, comprising:
contacting a plurality of wood pieces with a treatment formulation, comprising:
water;
at least one of a pesticide, a fungicide, or an insecticide;
a preservative selected from at least one of the following: chromated copper arsenate, borates, azoles, triazoles, alkaline copper, alkaline copper quaternary salts, alkaline copper zinc arsenates, tebuconazole, quaternary ammonium compounds, isothiazolones, and carbamates; and
a water repellent; and
gluing the wood pieces together with an adhesive, the adhesive comprising:
a polyvinyl acetate resin; and
an isocyanate cross-linking agent.
14. The method of claim 13 , wherein contacting the wood pieces with the treatment formulation is performed after gluing the wood pieces together.
15. The method of claim 13 , wherein contacting the wood pieces with the treatment formulation is performed prior to gluing the wood pieces together.
16. The method of claim 13 , further comprising:
subjecting the wood pieces to a vacuum;
subjecting the wood pieces to positive pressure;
subjecting the wood pieces to elevated temperature; and
drying the wood pieces.
17. The method of claim 16 , comprising the following ordered steps:
subjecting the wood pieces to a vacuum;
contacting the wood pieces with the treatment formulation;
subjecting the wood pieces to positive pressure; and
subjecting the wood pieces to elevated temperature.
18. The method of claim 13 , wherein the adhesive comprises about 80% to about 85% by weight of polyvinyl acetate resin, and about 15% to about 20% by weight of isocyanate cross-linking agent.
19. A wood product comprising:
a plurality of wood pieces having been treated with a treatment formulation, the treatment formulation comprising:
water;
at least one of a pesticide, a fungicide, or an insecticide;
a preservative selected from at least one of the following: chromated copper arsenate, borates, azoles, triazoles, alkaline copper, alkaline copper quaternary salts, alkaline copper zinc arsenates, tebuconazole, quaternary ammonium compounds, isothiazolones, and carbamates; and
a water repellant;
wherein the wood pieces are bonded together by an adhesive, the adhesive comprising:
a polyvinyl acetate resin; and
at least about 15% by weight of an isocyanate cross-linking agent.
20. The wood product of claim 19 , wherein the isocyanate cross-linking agent comprises a diphenylmethane diisocyanate (MDI).
21. The wood product of claim 19 , wherein the preservative comprises tebuconazole.
22. The wood product of claim 19 , wherein the adhesive comprises about 80% to about 85% by weight of polyvinyl acetate resin, and about 15% to about 20% by weight of isocyanate cross-linking agent.