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 wood product comprising:
a plurality of wood pieces having been treated with a treatment formulation comprising:
water;
at least one of a pesticide, a fungicide, or an insecticide;
a preservative comprising tebuconazole;
and a water repellant;
wherein the wood pieces are bonded together by an adhesive to form a window or door structure, wherein the adhesive comprises:
80% to 84% by weight of polymer resin, wherein the polymer resin comprises polyvinyl acetate polymer and polyvinyl alcohol; and
16% to 20% by weight of isocyanate cross-linking agent, wherein the isocyanate cross-linking agent comprises a diphenylmethane diisocyanate (MDI).
2. The wood product of claim 1 , wherein the wood pieces comprise fingerjoint cutstock, and wherein at least two of the wood pieces are bonded together by the adhesive between the fingers of the fingerjoint cutstock.
3. The wood product of claim 1 , wherein the treatment formulation further comprises an emulsifier.
4. The wood product of claim 1 , wherein the treatment formulation comprises a surfactant selected from at least one of the following: a nonionic surfactant, an anionic surfactant and an amphoteric surfactant.
5. The wood product of claim 1 , wherein the water repellant of the treatment formulation is selected from a wax or an oil.
6. The wood product of claim 1 , wherein the adhesive provides a bond strength of greater than 80% wood failure as measured by ASTM D 5572.
7. The wood product of claim 1 , wherein the adhesive comprises about 83% to about 84% by weight of the polymer resin, and about 16% to about 17% by weight of the isocyanate cross-linking agent.
8. The wood product of claim 1 , wherein the isocyanate cross-linking agent of the adhesive comprises at least one of the following: a pure MDI, a polymeric MDI, or a mixture of a pure MDI and a polymeric MDI.
9. The wood product of claim 8 , wherein the isocyanate cross-linking agent comprises:
about 45 to about 55% by weight poly(methylene phenylene isocyanate), about 40 to about 50% by weight methylene diphenyldiisocyanate, and about 1% to about 10% by weight methylene diphenylisocyanate.
10. The wood product of claim 1 , wherein the adhesive comprises about 83% to about 84% by weight of the polymer resin, and about 16% to about 17% by weight of the isocyanate cross-linking agent, the isocyanate cross-linking agent comprising:
about 45 to about 55% by weight poly(methylene phenylene isocyanate), about 40 to about 50% by weight methylene diphenyldiisocyanate, and about 1% to about 10% by weight methylene diphenylisocyanate.
11. The wood product of claim 1 , wherein the polymer resin comprises about 10% to about 79% by weight polyvinyl acetate polymer, and about 5% to about 15% by weight polyvinyl alcohol.
12. A wood product comprising:
a plurality of wood pieces having been treated with a treatment formulation comprising:
water;
at least one of a pesticide, a fungicide, or an insecticide;
a preservative comprising tebuconazole;
and a water repellant;
wherein the treated wood pieces have a moisture content of about 5% to about 20%, and
wherein the treated wood pieces having a moisture content of about 5% to about 20% are bonded together by an adhesive to form a window or door structure, wherein the adhesive comprises:
80% to 84% by weight of polymer resin, wherein the polymer resin comprises polyvinyl acetate polymer and polyvinyl alcohol; and
16% to 20% by weight of isocyanate cross-linking agent, wherein the isocyanate cross-linking agent comprises a diphenylmethane diisocyanate (MDI).
13. The wood product of claim 12 , wherein the adhesive comprises about 83% to about 84% by weight of the polymer resin, and about 16% to about 17% by weight of the isocyanate cross-linking agent.