Wood preserving composition for treatment of in-service poles, posts, piling, cross-ties and other wooded structures
This invention discloses a wood preservative composition for the supplemental or remedial treatment of in-service poles, posts, piling, cross ties and other wooden structures. The wood preservative composition comprises copper 8-hydroxyquinolate (oxine copper) in combination with a boron compound or a fluoride compound.
1. A wood preservative composition comprising: copper-8-quinolinolate; a boron-containing compound; a carrier; and a thickening agent,
wherein the copper-8-quinolinolate is present in an amount of about 0.001% to about 10% by weight of the composition, and
wherein the composition is formulated as a paste having a viscosity of between 125 and 425 tenths of a millimeter (tmm) as measured using a penetrometer.
2. The wood preservative composition of claim 1 , wherein the carrier is aqueous.
3. The wood preservative composition of claim 1 , wherein the paste is thixotropic.
4. The wood preservative composition of claim 1 , wherein the wood preservative composition does not comprise one or more copper-solubilizing agents.
5. The wood preservative composition of claim 4 , wherein the copper-solubilizing agent comprises ammonia, an ammonium salt, an amine, mono- or polyalkanolamines.
6. The wood preservative composition of claim 1 , wherein the copper-8-quinolinolate is substantially insoluble in the carrier.
7. The wood preservative composition of claim 1 , wherein the copper-8-quinolinolate is present in an amount of about 0.001% to about 2% by weight of the composition.
8. The wood preservative composition of claim 7 , wherein the copper-8-quinolinolate is present in an amount of about 0.001% to about 1% by weight of the composition.
9. The wood preservative composition of claim 1 , wherein the boron-containing compound is a boric acid, a metal borate, a sodium borate, or a potassium borate.
10. The wood preservative composition of claim 9 , wherein the sodium borate is sodium tetraborate decahydrate, sodium tetraborate pentahydrate, or disodium octaborate tetrahydrate (DOT).
11. The wood preservative composition of claim 1 , wherein the weight ratio of the boron-containing compound to copper-8-quinolinolate is about 1:1.
12. The wood preservative composition of claim 1 , wherein the weight ratio of the boron-containing compound to copper-8-quinolinolate is about 10:1.
13. The wood preservative composition of claim 1 , wherein the weight ratio of the boron-containing compound to copper-8-quinolinolate is about 200:1.
14. The wood preservative composition of claim 1 , wherein the weight ratio of the boron-containing compound to copper-8-quinolinolate is about 1000:1.
15. The wood preservative composition of claim 1 , further comprising one or more organic biocides.
16. The wood preservative composition of claim 15 , wherein the organic biocide is a fungicide, an insecticide, a moldicide, a bactericide, an algaecide, or a combination thereof.
17. The wood preservative composition of claim 15 , wherein the organic biocide is a quaternary ammonium compound, a triazole compound, an imidazole compound, an isothiazolone compound, a pyrethroid compound, or a combination thereof.
18. The wood preservative composition of claim 15 , wherein the organic biocide is imidachloprid, fipronil, cyfluthrin, bifenthrin, permethrin, cypermethrin, chlorpyrifos, iodopropynyl butyl carbamate (IPBC), chlorothalonil, 2-(thiocyanatomethylthio) benzothiazole, an alkoxylated diamine, or carbendazim.
19. The wood preservative composition of claim 15 , wherein the organic biocide is present in an amount of about 0.001% to about 10% by weight of the composition.
20. The wood preservative composition of claim 19 , wherein the organic biocide is present in an amount of about 0.005% to about 5% by weight of the composition.
21. The wood preservative composition of claim 20 , wherein the organic biocide is present in an amount of about of 0.01% to about 1% by weight of the composition.
22. The wood preservative composition of claim 1 , wherein the thickening agent is an organic thickener.
23. The wood preservative composition of claim 22 , wherein the organic thickener is cellulose-derived.
24. The wood preservative composition of claim 23 , wherein the cellulose-derived organic thickener is a cellulose ester or a cellulose ether.
25. The wood preservative composition of claim 23 , wherein the organic thickener is cellulose nitrate, sulfate, cellulose phosphate, cellulose nitrite, cellulose xanthate, cellulose acetate, cellulose formate or a combination thereof.
26. The wood preservative composition of claim 24 , wherein the cellulose ether is methylcellulose, ethylcellulose, propylcellulose, benzylcellulose, carboxymethylcellulose, hydroxyethyl cellulose, hydroxypropylcellulose, hydroxybutylcellulose, cyanoethylcellulose, or carboxyethylcellulose.
27. The wood preservative composition of claim 1 , wherein the thickening agent is present in an amount of about 0.01% to about 50% by weight of the composition.
28. The wood preservative composition of claim 1 , wherein the thickening agent is present in an amount of about 0.5% to about 10% by weight of the composition.
29. The wood preservative composition of claim 1 , wherein the thickening agent is an inorganic thickener.
30. The wood preservative composition of claim 29 , wherein the inorganic thickener is a clay.
31. The wood preservative composition of claim 30 , wherein the clay is attapulgite, dickite, saponite, montmorillonite, nacrite, kaolinite, anorthite, halloysite, metahalloysite, chrysotile, lizardite, serpentine, antigorite, beidellite, stevensite, hectonite, smecnite, sepiolite, sauconite, nontronite, hectorite, vermiculite, illite, sericite, glauconite-montmorillonite, roselite-montmorillonite, bentonite, chlorite-vermiculite, illite-montmorillonite, halloysite-montmorillonite, or kaolinitemontmorillonite.
32. The wood preservative composition of claim 31 , wherein the clay is attapulgite, hectorite, bentonite, montmorillonite, sauconite, smecnite, stevensite, beidellite, nontronite, saponite, vermiculite, nacrite, or sepiolite.
33. The wood preservative composition of claim 29 , wherein the inorganic thickener is present in an amount of about 0.5% to about 30% by weight of the composition.
34. The wood preservative composition of claim 1 , further comprising a drying retardant or a hemictant, or both.
35. The wood preservative composition of claim 1 , wherein the thickening agent is a mixture of organic and inorganic thickeners.
36. The wood preservative composition of claim 1 , further comprising a wrap.
37. The wood preservative composition of claim 36 , wherein the wrap is a bandage.
38. A method for remedial treatment of wood, comprising the step of applying the composition of claim 1 to wood.
39. The method of claim 38 , wherein the wood is an in-service wood product.
40. The method of claim 39 , wherein the in-service wood product is a utility pole, a railroad tie or a wooden bridge.
41. The method of claim 38 , wherein the composition is applied by brush.
42. The method of claim 38 , wherein the composition is applied by spray.
43. The method of claim 38 , wherein the composition is applied to wood to a thickness of between 1/32 and ¾ inch.
44. The method of claim 38 , wherein the composition is applied to wood to a thickness of between 1/16 and 1/12 inch.
45. The method of claim 38 , wherein the composition is applied to wood to a thickness of between 1/16 and ¼ inch.
46. A method for preparing the wood preservative composition of claim 1 , comprising the step of maintaining the viscosity of the wood preservative composition at between 275 and 425 tmm.
47. The method of claim 46 , wherein the viscosity is maintained at between 300 and 400 tmm.
48. The method of claim 47 , wherein the viscosity is maintained at between 320 and 340 tmm.
49. A container comprising the wood preservative composition of claim 1 .
50. The container of claim 49 , wherein the container is a bag.
51. The container of claim 50 , wherein the viscosity of the wood preservative composition is between 175 and 375 tmm.
52. The container of claim 51 , wherein the viscosity is between 200 and 300 tmm.
53. The container of claim 52 , wherein the viscosity is between 210 and 250 μm.