Wood preservative composition comprising 4,5-dichloro-2-octylisothiazol-3(2H)-one, a method treating a wood substrate therewith, and a wood product produced therefrom
A wood preservative composition comprising 4,5-dichloro-2-octylisothiazol-3(2H)-one, a method of treating a wood substrate therewith, and a wood product produced therefrom are provided. The wood preservative composition comprises at least 0.5% by weight of DCOI based on the total weight of the composition and a retaining additive comprising a solvent-borne polymeric resin, a wax, or a combination thereof. A weight ratio of the DCOI to the retaining additive in the composition is in a range of 1:5 to 5:1.
1 . A wood preservative composition comprising:
1% by weight to 5% by weight of 4,5-dichloro-2-octylisothiazol-3-one (DCOI) based on a total weight of the wood preservative composition;
0.5% by weight to 10% by weight of a retaining additive comprising a wax, wherein a weight ratio of the DCOI to the retaining additive is in a range of 1:4 to 4:1; and
at least 80% by weight of an organic solvent.
2 . The wood preservative composition of claim 1 , wherein the wood preservative composition comprises 1% by weight to 10% by weight of the retaining additive.
3 . The wood preservative composition of claim 1 , wherein the wood preservative composition comprises 1.2% by weight to 5% by weight of the retaining additive.
4 . The wood preservative composition of claim 1 , wherein the retaining additive has a solubility in the organic solvent of at least 0.5% by weight.
5 . The wood preservative composition of claim 1 , wherein the retaining additive has a solubility in the organic solvent of at least 1% by weight.
6 . The wood preservative composition of claim 1 , wherein the wood preservative composition comprises 1.5% by weight to 5% by weight of the DCOI.
7 . The wood preservative composition of claim 1 , wherein the wood preservative composition comprises at least 90% by weight of an organic solvent.
8 . The wood preservative composition of claim 1 , wherein the organic solvent comprises a hydrocarbon solvent, an amine solvent, a glycol solvent, a ketone solvent, an ester solvent, an alcohol solvent, a halogenated solvent, a biodegradable organic solvent, or combinations thereof.
9 . The wood preservative composition of claim 1 , wherein the organic solvent comprises diesel, biodiesel, or a combination thereof.
10 . The wood preservative composition of claim 1 , wherein the weight ratio of the DCOI to the retaining additive is in a range of 1:1.5 to 1.5:1.
11 . The wood preservative composition of claim 1 , wherein the wax comprises an olefin wax, a petroleum wax, a carnauba wax, a polyethylene wax, a silicone wax, a polypropylene wax, a polytetrafluoroethylene (PTFE) synthetic wax, or a combination thereof.
12 . The wood preservative composition of claim 1 , wherein the wax comprises a melting point in a range of 40 degrees Celsius to 100 degrees Celsius.
13 . The wood preservative composition of claim 1 , wherein the organic solvent is liquid at room temperature.
14 . The wood preservative composition of claim 1 , wherein the organic solvent comprises a flash point of at least 20 degrees Celsius.
15 . The wood preservative composition of claim 1 , wherein the organic solvent comprises a flash point of at least 30 degrees Celsius.
16 . The wood preservative composition of claim 1 , wherein
the weight ratio of the DCOI to the retaining additive is in a range of 1:1.5 to 1.5:1;
the retaining additive has a solubility in the organic solvent of at least 1% by weight; and
the organic solvent comprises a hydrocarbon solvent, an amine solvent, a glycol solvent, a ketone solvent, an ester solvent, an alcohol solvent, a halogenated solvent, a biodegradable organic solvent, or combinations thereof.
17 . A method of treating a wood substrate, the method comprising:
contacting the wood substrate with the wood preservative composition of claim 1 for a period of time suitable to inhibit fungal decay of the wood substrate.
18 . A wood product produced by the method of claim 14 .
19 . The wood product of claim 15 , wherein the wood product retains at least 0.05 pounds of DCOI per cubic foot of the wood product.
20 . The wood product of claim 15 , wherein the wood product comprises a deck, a rail, a fence, a utility pole, a pile, a railway tie, a railroad bridge, cladding, siding, or a combination thereof.