CA2530044A1 - Particulate wood preservative and method for producing same - Google Patents

Particulate wood preservative and method for producing same Download PDF

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Publication number
CA2530044A1
CA2530044A1 CA002530044A CA2530044A CA2530044A1 CA 2530044 A1 CA2530044 A1 CA 2530044A1 CA 002530044 A CA002530044 A CA 002530044A CA 2530044 A CA2530044 A CA 2530044A CA 2530044 A1 CA2530044 A1 CA 2530044A1
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CA
Canada
Prior art keywords
copper
particulates
wood preservative
weight
sparingly soluble
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002530044A
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French (fr)
Other versions
CA2530044C (en
Inventor
H. Wayne Richardson
Robert L. Hodge
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Osmose Inc
Original Assignee
Phibro-Tech, Inc.
H. Wayne Richardson
Robert L. Hodge
Osmose, Inc.
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Application filed by Phibro-Tech, Inc., H. Wayne Richardson, Robert L. Hodge, Osmose, Inc. filed Critical Phibro-Tech, Inc.
Publication of CA2530044A1 publication Critical patent/CA2530044A1/en
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Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
    • A01N59/16—Heavy metals; Compounds thereof
    • A01N59/20—Copper
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
    • A01N25/12—Powders or granules
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
    • A01N25/26—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests in coated particulate form
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D15/00—Woodstains
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • B27K3/005—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process employing compositions comprising microparticles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • B27K3/007—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process employing compositions comprising nanoparticles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • B27K3/16—Inorganic impregnating agents
    • B27K3/22—Compounds of zinc or copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • B27K3/16—Inorganic impregnating agents
    • B27K3/32—Mixtures of different inorganic impregnating agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • B27K3/52—Impregnating agents containing mixtures of inorganic and organic compounds

Abstract

A wood preservative includes injectable particles comprising one or more sparingly soluble copper salts. The copper-based particles are sufficiently insoluble so as to not be easily removed by leaching but are sufficiently soluble to exhibit toxicity to primary organisms primarily responsible for the decay of the wood. Exemplary particles contain for example copper hydroxide, basic copper carbonate, copper carbonate, basic copper sulfates including particularly tribasic copper sulfate, basic copper nitrates, copper oxychlorides , copper borates, basic copper borates, and mixtures thereof. The particles typically have a size distribution in which at least 50 % of particles have a diameter smaller than 0.25 ~m, 0.2 ~m, or 0.15 ~m. At least about 20 % and even more than 75% of the weight of the particles may be composed of the substantially crystalline copper salt. Wood or a wood product may be impregnated with copper-based particles of the invention.

Claims (92)

1. A wood preservative composition comprising:
a plurality of first particulates comprising at least 20% by weight of a sparingly soluble copper salt, wherein greater than 98% by weight of the particulates have a diameter less than 0.5 microns as determined by the settling velocity of the particle in water, and at least 50% have a diameter greater than 40 nanometers.
2. The wood preservative of claim 1, wherein greater than 98% by weight of the first particulates have a diameter less than about 0.3 microns, and less than 0.5% by weight have a diameter greater than 1.5 microns.
3. The wood preservative of claim 1, wherein greater than 98% by weight of the first particulates have a diameter less than about 0.2 microns and greater than 80% by weight of the first particulates have a diameter greater than 0.01 microns.
4. The wood preservative of claim 1, wherein the first particulates comprise at least 50% by weight of a sparingly soluble copper salt, and at least 50% of the first particulates have a diameter greater than 80 nanometers.
5. The wood preservative of claim 1, wherein the preservative is substantially free of first particulates having a diameter less than 5 nanometers.
6. The wood preservative of claim 1, wherein at least 99% of the particulates have a diameter less than 0.35 microns.
7. The wood preservative of any of claims 1-7, wherein there is less than 10%
amines based on the weight of the first particulates.
8. The wood preservative of any of claims 1-7, wherein the sparingly soluble copper salt comprises copper(II) borate.
9. The wood preservative of any of claims 1-7, wherein the sparingly soluble copper salt comprises basic copper carbonate.
10. The wood preservative of any of claims 1-7, wherein the sparingly soluble copper salt comprises tribasic copper sulfate.
11. The wood preservative of any of claims 1-7, wherein the sparingly soluble copper salt comprises copper hydroxide.
12. The wood preservative of any of claim 1-7, wherein the sparingly soluble copper salt comprises copper oxychloride.
13. The wood preservative of any of claims 1-7, wherein the sparingly soluble copper salt comprises alkaline copper nitrate.
14. The wood preservative of any of claims 1-7, wherein the sparingly soluble copper salt comprises copper ferricyanide, copper ferricyanate, or mixture thereof.
15. The wood preservative of any of claims 1-7, wherein the sparingly soluble copper salt comprises copper fluorosilicate.
16. The wood preservative of any of claims 1-7, wherein the sparingly soluble copper salt comprises copper thiocyanate.
17. The wood preservative of any of claims 1-7, wherein the sparingly soluble copper salt comprises copper diphosphate.
18. The wood preservative of any of claims 1-7, wherein the sparingly soluble copper salt comprises copper borate, basic copper borate, or mixture thereof.
19. The wood preservative of any of claims 1-7, wherein the sparingly soluble copper salt comprises copper carbonate, copper boride, copper(I) carbonate, or copper phosphate.
20. The wood preservative of any of claims 1-7, wherein at least a portion of the first particulates comprise Cu2O.
21. The wood preservative of any of claims 1-7, wherein the sparingly soluble copper salt is substantially crystalline.
22. The wood preservative of any of claims 1-7, wherein the sparingly soluble copper salt comprises copper/magnesium hydroxide, and wherein there are between 6 parts and 20 parts magnesium per 100 parts copper.
23. The wood preservative of any of claims 1-7, wherein the sparingly soluble copper salt comprises copper/magnesium/zinc hydroxide, and wherein there are between 6 parts and 20 parts total of magnesium and zinc per 100 parts copper.
24. The wood preservative of any of claims 1-7, wherein the sparingly soluble copper salt comprises basic copper/magnesium carbonate, and wherein there are between 6 parts and 20 parts magnesium per 100 parts copper.
25. The wood preservative of any of claims 1-7, wherein the sparingly soluble copper salt comprises basic copper/magnesium/zinc carbonate, and wherein there are between 6 parts and 20 parts total of magnesium and zinc per 100 parts copper.
26. The wood preservative of any of claims 1-7, further comprising a plurality of second particulates comprising at least 20% by weight of a sparingly soluble zinc salt, wherein greater than 98% by weight of the second particulates have a diameter less than 0.5 microns as determined by the settling velocity of the particle in water.
27. The wood preservative of claim 26, wherein the sparingly soluble zinc salt comprises zinc borate, basic zinc borate, or mixture thereof.
28. The wood preservative of any of claims 1-7, further comprising a plurality of second particulates comprising at least 20% by weight of a metallic copper, metallic zinc, or mixture thereof, wherein greater than 98% by weight of the second particulates have a diameter less than 0.3 microns as determined by the settling velocity of the particle in water.
29. The wood preservative of any of claims 1-7, further comprising a plurality of second particulates comprising at least 20% by weight of a sparingly soluble tin salt, wherein greater than 98% by weight of the second particulates have a diameter less than 0.5 microns as determined by the settling velocity of the particle in water.
30. The wood preservative of any of claims 1-7, wherein at least a portion of the first particulates comprises a copper phosphate coating thereon.
31. The wood preservative of any of claims 1-7, further comprising at least one organic biocide.
32. The wood preservative of claim 31, wherein at least a portion of the organic biocide is coated on the first particulates.
33. The wood preservative of any of claims 1-7, wherein at least a portion of the first particulates comprises an organic coating.
34. The wood preservative of any of claims 1-7, wherein at least a portion of the first particulates comprises a dispersing agent attached thereon.
35. The wood preservative of any of claims 1-7, wherein the first particulates comprise at least 50% by weight of a sparingly soluble copper salt.
36. The wood preservative of any of claims 1-7, wherein at least a portion of the first particulates comprises between 0.001% to 0.5% silver, based on the weight of the particulates.
37. The wood preservative of any of claims 1-7, wherein at least a portion of the first particulates comprises a coating of copper 8-quinolinolate.
38. The wood preservative of any of claims 1-7, wherein the first particulates comprise at least 50% of a substantially crystalline sparingly soluble copper salt.
39. The wood preservative of any of claims 1-7, further comprising a plurality of second particulates comprising a carrier having an organic biocide associated thereon, wherein greater than 98% by weight of the second particulates have a diameter less than 0.3 microns as determined by the settling velocity of the particle in water.
40. The wood preservative of any of claims 1-7, wherein at least a portion of the first particulates comprises an organic coating and an organic biocide disposed thereon.
41. The wood preservative of any of claims 1-7, wherein the preservative further comprises an anionic surfactant.
42. The wood preservative of any of claims 1-7, wherein the first particulates comprise less than 30 ppm lead based on the weight of the particulates.
43. The wood preservative of any of claims 1-7, further comprising a plurality of second particulates comprising a copper oxide, wherein greater than 98% by weight of the second particulates have a diameter less than 0.3 microns as determined by the settling velocity of the particle in water.
44. The wood preservative of any of claims 1-7, further comprising a plurality of second particulates comprising a copper oxide, wherein greater than 98% by weight of the second particulates have a diameter less than 0.3 microns as determined by the settling velocity of the particle in water.
45. The wood preservative of any of claims 1-7, wherein the first particulates comprise less than 35% by weight polymers.
46. The wood preservative of any of claims 1-7, wherein the first particulates comprise less than 15% by weight polymers.
47. The wood preservative of any of claims 1-7, wherein the first particulates comprise polymers, wherein the weight ratio of polymers to copper is between about 1:1 and about 1:10.
48. The wood preservative of any of claims 1-7, wherein the at least 30% by weight of the first particulates have a diameter between about 0.07 microns and about 0.5 microns.
49. The wood preservative of any of claims 1-7, wherein the at least 30% by weight of the first particulates have a diameter between about 0.07 microns and about 0.5 microns.
50. The wood preservative of any of claims 1-7, wherein the sparingly soluble copper salt comprises copper borate and at least one of copper hydroxide and basic copper carbonate.
51. The wood preservative of any of claims 1-7, wherein the sparingly soluble copper salt comprises a sparingly soluble copper/zinc salt.
52. The wood preservative of any of claims 1-7, further comprising between about 0.1 and about 1 mole phosphonate-based scale inhibitors per kg of particulates.
53. The wood preservative of claim 52, wherein the scale inhibitor comprises hydroxyethylidene-diphosphonic acid.
54. The wood preservative of any of claims 1-7, further comprising a wetting agent.
55. The wood preservative of any of claims 1-7, further comprising a moldicide.
56. A method of manufacturing the wood preservative composition of claim 1, comprising the steps of:
1) providing particulates comprising sparingly soluble copper salts, wherein at least 2% by weight of the particulates have a diameter greater than 1 micron; and 2) wet milling the particulates with a milling medium comprising zirconium having a diameter between about 0.1 mm and about 1 mm.
57. The method of claim 56 wherein the milling media has a diameter between about 0.3 mm and 0.7 mm.
58. The method of claim 56 wherein a wetting fluid or a rinsing fluid used in wet milling comprises between 0.1% phosphate and 6% phosphate.
59. The method of claim 56 wherein the step of providing particulates comprising sparingly soluble copper salts comprises: providing an aqueous copper-alkanolamine complex solution; adding acid to adjust the pH to between about 4 and about 7.5 to provide copper hydroxide particulates; and recovering the copper hydroxide particulates.
60. The method of claim 59 wherein the acid comprises phosphoric acid.
61. The method of claim 56 wherein the step of providing particulates comprising sparingly soluble copper salts comprises: providing an aqueous solution of copper ions and magnesium ions, wherein the solution comprises about 0.2 to about 3.5 parts by weight magnesium per 22.5 parts by weight copper; adding a base to reduce the pH of the composition to above about 7 to provide copper-containing particulates; and recovering the copper-containing particulates.
62. The method of claim 56 wherein the step of providing particulates comprising sparingly soluble copper salts comprises: providing an aqueous solution of copper ions, zinc ions, and magnesium ions, wherein the solution comprises about 0.1 to about 3 parts by weight zinc and 0.25 to about 5 parts by weight magnesium per 22.5 parts by weight copper;
adding a base to reduce the pH of the composition to above about 7 to provide copper-containing particulates; and recovering the copper-containing particulates.
63. The wood preservative of any of claims 1-7, wherein the first particulates are suspended in a aqueous carrier, and wherein the preservative further comprises a dispersing agent, an anti-aggregation agent, a wetting agent, or any combination thereof.
64. The wood preservative of claim 63, wherein the aqueous carrier comprises less than 1% by weight alkanolamines and less than 1% by weight ammonia.
65. The wood preservative of claim 63, wherein the aqueous carrier comprises less than 0.1% by weight alkanolamines and less than 0.1% by weight ammonia, based on the weight of the suspension.
66. The wood preservative of claim 63, wherein the pH of the aqueous carrier is between 7.5 and 9.5, and less than about 0.5% by weight of the particulates have an average diameter greater than 1 micron.
67. The wood preservative of claim 63, wherein the aqueous carrier comprises between about 5 ppm and about 500 ppm soluble phosphate.
68. The wood preservative of claim 63, wherein at least 60% by weight of the first particulates in the slurry are monodisperse.
69. The wood preservative of claim 63, further comprising a water-insoluble organic biocide that adheres to the first particulates.
70. The wood preservative of claim 63, further comprising a corrosion inhibitor.
71. The wood preservative of claim 63, further comprising a pH buffer.
72. The wood preservative of claim 63, wherein the slurry comprises between about 15% and 40% by weight of the first particulates.
73. The wood preservative of claims 1-7, wherein the preservative is a dry mix further comprising a wetting agent and a dispersing agent.
74. The wood preservative of claim 73, further comprising a plurality of second particulates comprising a carrier having an organic biocide associated thereon, wherein greater than 98% by weight of the second particulates have a diameter less than 0.3 microns as determined by the settling velocity of the particle in water.
75. The wood preservative of claim 73, further comprising a granulating agent, wherein the preservative is a granular material that is dispersible in water.
76. The wood preservative of claim 75, further comprising an organic biocide.
77. The wood preservative of claim 75, comprising about 50% to about 70% of the sparingly soluble copper salts; about 10% to about 25% of a dispersing agent; about 1 to about 8% of a wetting agent; and about 10% to about 30% filler.
78. The wood preservative of claim 75, comprising about 40% to about 80% by weight of a sparingly soluble copper salt, about 5% to about 30% of a dispersing agent, about 1% to about 10% of a wetting agent, and about 5% to about 30% of a inert particulate filler.
79. The wood preservative of claim 78, wherein the inert particulate filler further comprises an organic biocide associated therewith.
80. The wood preservative of claim 75, further comprising between about 0.1 to about 1 mole phosphonate-based scale inhibitors per kg of granular material.
81. The wood preservative of claim 80, wherein the scale inhibitor comprises hydroxyethylidene diphosphonic acid.
82. The wood preservative of claim 75, wherein the granular material comprises A) about 30% to about 70% by weight of slightly soluble copper salt; B) about 10% to about 35% by weight of at least one dispersing agent; C) between about 2.5% to about 20 % by weight of at least one wetting agent; D) between about 5% to about 25% by weight of at least one diluent, granulating agent, and/or inert particulate carrier; and E) between about 0.05% to about 7.5% by weight of at least one antifoam agent.
83. A method of preserving wood comprising:
providing an aqueous suspension of the wood preservative of any of claims 1 to 20;
providing a wood having open porosity therein; and injecting the suspension into wood.
84. A preserved wood prepared by the method of claim 83.
85. A wood preservative composition comprising:
a plurality of first particulates comprising at least 30% by weight of a sparingly soluble substantially crystalline copper salt, wherein greater than 98% by weight of the first particulates have a diameter less than 0.5 microns as determined by the settling velocity of the first particulates in water, and wherein the average diameter of the first particulates is between about 50 nanometers and about 250 nanometers.
86. A wood preservative composition comprising:
a plurality of particulates comprising at least 20% by weight of a sparingly soluble zinc salt, wherein greater than 98% by weight of the particulates have a diameter less than 0.5 microns as determined by the settling velocity of the particle in water, and at least 50% have a diameter greater than 40 nanometers.
87. The wood preservative of claim 86, wherein the sparingly soluble copper salt comprises zinc carbonate; zinc chloride; zinc cyanide; zinc diphosphate; zinc fluoride; zinc fluoride; zinc hydroxide; zinc oxide; zinc phosphate; or zinc sulfate.
88. A method for preserving wood comprising: impregnating wood with a wood preservative comprising a liquid carrier and one or more injectable particulates comprising a sparingly soluble copper salt, sparingly soluble zinc salt, or mixtures thereof.
89. The method of claim 88, wherein the sparingly soluble copper salt is a substantially crystalline copper salt.
90. The method of claim 88, wherein one or more injectable particulates comprise one or more organic biocides coated or absorbed thereon.
91. The method of claim 88, wherein the sparingly soluble copper salt comprises copper hydroxides; copper carbonates, basic copper carbonates; basic copper sulfates; basic copper nitrates; copper oxychlorides; copper borates, basic copper borates, and mixtures thereof.
92. Wood impregnated with the method of any of claims 88 to 91.
CA2530044A 2003-06-17 2004-06-17 Particulate wood preservative and method for producing same Active CA2530044C (en)

Applications Claiming Priority (11)

Application Number Priority Date Filing Date Title
US47882503P 2003-06-17 2003-06-17
US47882703P 2003-06-17 2003-06-17
US47882203P 2003-06-17 2003-06-17
US47882003P 2003-06-17 2003-06-17
US60/478,825 2003-06-17
US60/478,827 2003-06-17
US60/478,820 2003-06-17
US60/478,822 2003-06-17
US57153504P 2004-05-17 2004-05-17
US60/571,535 2004-05-17
PCT/US2004/019659 WO2005007368A2 (en) 2003-06-17 2004-06-17 Particulate wood preservative and method for producing same

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CA2530044A1 true CA2530044A1 (en) 2005-01-27
CA2530044C CA2530044C (en) 2012-09-25

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US (4) US20040258768A1 (en)
EP (1) EP1651401B1 (en)
JP (1) JP4971790B2 (en)
CN (1) CN1835830A (en)
AU (2) AU2004257148A1 (en)
BR (1) BRPI0411340B1 (en)
CA (1) CA2530044C (en)
DE (1) DE602004022171D1 (en)
DK (1) DK1651401T3 (en)
ES (1) ES2329044T3 (en)
HK (1) HK1088862A1 (en)
MX (1) MXPA05013850A (en)
NZ (1) NZ544699A (en)
PL (1) PL1651401T3 (en)
WO (1) WO2005007368A2 (en)

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