Fire retardant compositions and methods for preserving wood products
First Claim
1. A preservative composition for imparting fire retardant, insecticidal, and fungicidal properties to wood products, consisting essentially of an aqueous solution of a boron source composition selected from the group of boric acid and the water-soluble salts thereof, a melamine binder resin, and a urea casein activator resin.
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Abstract
Wood preservative compositions are disclosed. Treatment of lumber, plywood, and other wood products with a novel composition comprising the boron source composition, a melamine binder resin, and a urea casein activator resin protects lumber, plywood, and other wood products from attack by termites, fungi, fire and flame. The preservative can be formed by combining a source of boron such as boric acid and the water-soluble salts thereof, a melamine binder resin, and a urea casein resin. A wood preservative is characterized by a weight ratio of the urea casing activator resin to the melamine binder resin ranging from about 1:20 to 1:4 and a weight ratio of the boron source composition to the melamine binder resin ranging from about 1.3:1 to 9.6:1.
254 Citations
31 Claims
- 1. A preservative composition for imparting fire retardant, insecticidal, and fungicidal properties to wood products, consisting essentially of an aqueous solution of a boron source composition selected from the group of boric acid and the water-soluble salts thereof, a melamine binder resin, and a urea casein activator resin.
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10. A stable, aqueous preservative composition for treating a wood product which is capable of penetrating said wood products without incision and does not reduce the structural integrity of said wood products, consisting essentially of a primary fire retardant composition capable of imparting an insecticidal, fungicidal, and flame retardant qualities to the wood product;
- consisting essentially of an aqueous solution of a boron source composition selected from the group of boron acid and the water-soluble salts thereof;
a melamine binder resin; and
a urea casein activator resin;
wherein the melamine binder resin and the urea casein activator resin react to form a nitrogen liberating compound which releases nitrogen gas when exposed to a flame and acts as a binding agent to inhibit the primary fire retardant composition from leaching from the wood products. - View Dependent Claims (11)
- consisting essentially of an aqueous solution of a boron source composition selected from the group of boron acid and the water-soluble salts thereof;
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12. A method for preserving a wood product against fungus, insects and fire, comprising the steps of treating the wood product with a fungicidal, insecticidal, and fire retardant amount of a stable, aqueous preservative composition, wherein the aqueous preservative composition consisting essentially of a boron source composition selected from the group of boric acid and the water-soluble salts thereof, a melamine binder resin, and an urea casein activator resin;
- and drying the treated wood product until the hygroscopic moisture content is at or below about 19%.
- View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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21. A method for preserving a wood product against fungus, insects and fire consisting essentially of the steps of preparing an aqueous solution of melamine binder resin, wherein the aqueous melamine binder resin solution is buffered at a pH of about 5.0 to about 7.5 with a phosphate buffer so that the nitrogen concentration ranges from about 17.2% to about 18.3% and the phosphate concentration ranges from about 15.7% to about 16.8%;
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preparing an aqueous solution of a boron source composition selected from the group of boric acid and the water-soluble salts thereof;
forming a stable aqueous preservative solution by adding the aqueous melamine binder resin solution and an urea casein activator resin to the aqueous boron source composition solution;
treating the wood product by applying a fungicidal, insecticidal, and fire retardant amount of the stable wood preservative solution; and
drying the treated wood product until the hygroscopic moisture content is below about 19%.- View Dependent Claims (22, 23, 24)
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- 25. A treated wood product containing a fire retardant, insecticidal, and fungicidal amount of a melamine polymer borate preservative, wherein the melamine polymer results from the polymerization of a melamine binder resin and an urea casein activator resin after treatment with a wood preservative composition consisting essentially of an aqueous solution of a boron source composition selected from the group of boric acid and the water-soluble salts thereof, a melamine binder resin, and a urea casein activator resin.
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31. Treated plywood containing a fire retardant, insecticidal, and fungicidal amount of a melamine polymer borate preservative wherein said melamine polymer results from the polymerization of a melamine binder resin and an urea casein activator resin after treatment with a wood preservative composition consisting essentially of an aqueous solution of a boron source composition selected from the group of boric acid and the water-soluble salts thereof, a melamine binder resin, and a urea casein activator resin and wherein said wood preservative composition binds the laminate structure of said treated plywood.
Specification