JP2005511262A5 - - Google Patents

Claims (51)

  A method for reducing the degradation rate of wood, for immersing at least a portion of the wood with an aqueous mixture comprising an alkaline colloidal composition of a silicon-containing salt incorporated with boron ions and the wood. For a sufficient period of time.   The method of claim 1 wherein the wood is contacted by immersing the wood in an aqueous mixture at a pressure above atmospheric pressure in a closed container.   The method of claim 2, wherein the pressure is generated by increasing the flow rate of the aqueous mixture into the vessel while reducing the flow rate exiting the vessel. 3. The method of claim 2, wherein the pressure is from about 862 kPa ( 125 psi ) to about 1206 kPa ( 175 psi ) , and occurs using liquid pressure.   The method of claim 4, wherein the pressure is maintained for about 30 minutes to about 2 hours.   The method of claim 5 wherein the dry weight of the wood is increased by about 20% to about 70% more than the original weight of the wood.   The method of claim 1, wherein after the wood is immersed in the composition, the wood is removed from contact with the aqueous composition and dried to provide a product in which silicon-containing and boron-containing salts are deposited. The method of claim 1, wherein the alkaline silicon-containing salt composition comprises water, silica, metal borate or boric acid basified with an alkali metal hydroxide to a pH of at least about 10. The method of claim 8, wherein the alkaline silicon-containing salt composition further comprises an aluminum halide . Water containing sodium hydroxide or potassium hydroxide to achieve a pH of about 10-11, about 2-20% weight / volume silica, and about 2-20% weight / volume when the alkaline silicon-containing salt composition is about 10-11 The method of claim 7 comprising a boron-containing salt of The method of claim 10, wherein the alkaline silicon-containing salt composition further comprises an aluminum halide . The alkaline silicon-containing salt composition comprises water containing about 3 to about 4 molar sodium hydroxide or potassium hydroxide, about 2 to about 20% weight / volume silicate form silica, about 2 to about 10. A process according to claim 8 or 9 , comprising 20% weight / volume borax, about 0.1 to about 1% weight / volume aluminum halide and a stabilizing amount of tripotassium citrate. The method according to claim 10 or 11 , wherein the water comprises potassium hydroxide.   The method of claim 1, wherein the wood is contacted by applying an aqueous composition to the surface of the wood at ambient pressure and drying it. The method of claim 1 4, wherein the aqueous composition is applied with a brush. The method of claim 1 4, wherein the aqueous composition is applied by spraying.   The method of claim 2, wherein after the pressure treatment, the wood is dried under environmental conditions for at least 30 days.   The method of claim 2 wherein the wood is treated with an aqueous solution of calcium silicate together with an alkaline silicon-containing salt composition. Articles of manufacture comprising silicon-containing salts and wood soaked with boron-containing salts. 20. The article of manufacture of claim 19, comprising wood soaked with a silicon-containing salt, a boron-containing salt and an aluminum halide . The silicon-containing salt is present in the wood at a concentration of about 1 to about 30% mass / mass (weight / weight), and the boron-containing salt is in the wood at a concentration of about 1 to about 30% mass / mass (weight / weight). 21. A manufactured article according to claim 19 or 20 . 21. The article of manufacture of claim 19 or 20 , wherein the dry weight of the soaked wood is about 20 to about 70% greater than the corresponding unsoaked wood. 23. The article of manufacture of claim 22, wherein the soaked wood is substantially immersed throughout the structure of the wood. 21. The article of manufacture of claim 19 or 20 , wherein the wood is immersed on the surface of the wood. Dipping, claims 2 to 4, wherein the article of manufacture caused by the colloidal silica composition of the alkaline which is supersaturated with a boron-containing salt spray or brush coating. Immersion is caused by the beauty halogenation aluminum Oyo alkaline colloidal silica composition supersaturated with a boron-containing salt spray or brush coating according to claim 2 4, wherein the article of manufacture. A colloidal composition comprising water, an alkali metal hydroxide, a silicon-containing salt, and a boron-containing salt in an amount sufficient to bring the pH of the water to at least 10. 28. The colloidal composition of claim 27 further comprising an aluminum halide . 29. The colloidal composition according to claim 27 or 28, further comprising a preservative . 30. The composition according to any one of claims 27 to 29, wherein the alkali metal hydroxide is sodium hydroxide or potassium hydroxide. Claim 2 7 composition wherein the alkali metal hydroxide is potassium hydroxide. Composition, according to claim 2 7 composition according colloidal particles are colloidal suspension showing the zeta potential of about -40 to about -75 mV. Silicon-containing salt, according to claim 2 7 composition according to present in a concentration of about 2-20% weight / volume. 34. The composition of claim 33 , wherein the silicon-containing salt is present at a concentration of at least about 4% weight / volume. 34. The composition of claim 33 , wherein the boron-containing salt is present at a concentration of about 2-20% weight / volume. Claim 2 7 composition according preservative is tripotassium citrate. Aluminum halide is from about present at up to 1.0% weight / volume, three aluminum chloride or aluminum trifluoride according to claim 2 7 composition. Any one composition according to claim 2 7-3 7 colloidal particles exhibit a zeta potential of about -40 to about -75 mV. A method for producing a composition suitable for reducing the rate of wood degradation, comprising:
(A) a boron-containing salt, mixing an alkali metal silicate colloidal mixture at a pH of at least 10, rabbi to <br/> (c) were mixed, uniform being supersaturated with the boron-containing salt Forming a colloidal composition. 40. The method of claim 39, wherein after mixing the boron-containing salt with the alkali metal silicate colloidal mixture, (b) an aluminum halide and a preservative are added . 41. The method of claim 39 or 40 , wherein the alkali metal silicate solution is adjusted to pH 10 using potassium hydroxide or sodium hydroxide. 42. The method of claim 41 , wherein the water is adjusted to a pH of at least 10 using potassium hydroxide. 42. The method of claim 41 , wherein the boron-containing salt is borax. 41. The method of claim 39 or 40 , wherein the silicon-containing salt is present at a concentration of about 2 to about 20% weight / volume. 45. The method of claim 44 , wherein the silicon-containing salt is present at a concentration of at least about 4% weight / volume. 41. The method of claim 39 or 40 , wherein the boron containing salt is present at a concentration of about 2-20% weight / volume. 41. The method of claim 39 or 40 , wherein the preservative is tripotassium citrate. 41. The method of claim 39 or 40 , wherein the aluminum halide is aluminum trichloride present at up to about 1.0% weight / volume. 49. The method of any one of claims 39 to 48 , wherein the method is carried out under conditions that produce colloidal particles of the composition exhibiting a zeta potential of about -40 to about -75 mV. 50. The method of any one of claims 39 to 49 , wherein the colloidal composition flows in a countercurrent manner through the magnetic field for a time sufficient to provide colloidal particles having a zeta potential of about -40 to about -75 mV.   The method of claim 2 wherein the soaking and pressure are maintained for a time sufficiently long to soak the wood substantially throughout its structure.