WO2001070472A1 - Preserving compositions - Google Patents
Preserving compositions Download PDFInfo
- Publication number
- WO2001070472A1 WO2001070472A1 PCT/AU2001/000325 AU0100325W WO0170472A1 WO 2001070472 A1 WO2001070472 A1 WO 2001070472A1 AU 0100325 W AU0100325 W AU 0100325W WO 0170472 A1 WO0170472 A1 WO 0170472A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- blocks
- vacuum
- zinc
- solution
- digestion
- Prior art date
Links
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
- A01N59/14—Boron; Compounds thereof
-
- 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
- B27K3/163—Compounds of boron
-
- 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
Definitions
- the present invention relates to preserving compositions for porous products, especially wood.
- Compounds of boron have been used in the preservation of wood for a number of years. However, one of the difficulties experienced in use of these compounds is their propensity to leach from the substrate into which they have been impregnated. Consequently, compounds of boron have not been particularly useful in preserving timber exposed to water, for example, pylons embedded in a sea bed.
- Basic zinc compounds also have toxic efficacy with respect to wood destroying organisms, both in the marine and land environments. However, despite this efficacy having been known, basic zinc compounds have not been used commercially.
- the present invention is based on the discovery that a composition comprising a basic zinc compound and a compound of boron has a toxic efficacy to wood destroying organisms, both in the marine and land environments with the added benefit of a reduction in the rate at which the boron compound leaches from the impregnated substrate.
- the present invention provides a preserving composition which includes a basic zinc compound and a compound of boron.
- a preferred composition comprises zinc ions and borate ions in an aqueous solution of ammonia.
- the zinc ions may be derived from any soluble zinc compound and the borate ions may be derived from any soluble borate but zinc borate is preferred.
- Examples of soluble zinc compounds include zinc sulfate and zinc chloride and examples of soluble borates include sodium borate and potassium borate.
- a solution of zinc ions and borate ions in aqueous ammonia may be prepared by dissolving zinc borate in an aqueous solution of ammonia at a temperature of about 66°C.
- a soluble zinc salt may be combined with a soluble borate salt in an aqueous ammonia solution at a temperature of about 66°C.
- the preserving composition of the present invention may be combined with other additives having efficacy as preservatives. These include copper sulfate, fluorides such as potassium fluoride and quaternary ammonium compounds .
- Porous compounds especially porous cellulosic compounds, may be impregnated with the preserving composition of the present invention by flooding the porous compound at reduced pressure .
- the pressure is reduced to a level in the range between 0.5 kPa and 0.9 kPa.
- the present invention provides a means of impregnating a substrate with a preserving composition by means of coacervation.
- Coacervation occurs when a liquid compound separates into two phases below a particular temperature. One phase is rich in one compound and the other is leaner. Coacervation is similar to crystallisation from a mother liquor.
- the amount of water used was 50 ml per block, and the total amount of water used was 300 ml. The loss of water to the uptake was re-added.
- AES Inductively Coupled Plasma-Atomic Emission Spectrometry
- the four blocks were quantitatively powdered, homogenised and dried at 100°C for 2 hours before analysis .
- Example 2 The impregnant used in Example 2 was prepared in the same way as in Example 1.
- Impregnation While the impregnation was conducted in a similar way to that in Example 1, different vacuums were used.
- Vacuum was applied to the pressure vessel containing the treated blocks . • After a vacuum of 2.5 kPa was reached, the vacuum was run for 30 minutes.
- the leaching was carried out in a similar way to that in Example 1 except different vacuums were used. • The leaching was conducted as detailed in the American Wood Preserver's Association Standard Ell-8.
- the impregnant was diluted to an appropriate concentration that is within the working range of the analytical instrument.
- the diluted impregnant was determined and the concentrations of boron and zinc are 11.30g/L and 28.28g/L respectively. • The determined concentration of the impregnant was used to calculate the mass balance.
- the boron concentrations in the leachates are as follows .
- the four blocks were quantitatively powdered, homogenised and dried at 100°C for 2 hours before analysis .
- the leaching was carried out in a similar way to that in Examples 1 and 2 although different vacuums were used.
- the amount of water used was 50 ml per block, and the total amount of water used was 300 ml. The loss of water to the uptake was re-added.
- the impregnant was diluted to an appropriate concentration that is within the working range of the analytical instrument.
- the diluted impregnant was determined and the concentrations of boron, zinc and copper were 10.80g/L, 26.94g/L and 36.52g/L respectively.
- Impregnation While the impregnation was conducted in a similar way to that in Examples 1 and 2, different vacuums were used.
- the leaching was carried out in a similar way to that used in Example 1 although different vacuums were used.
- Impregnant, Leachates and Digested Blocks after Leaching All the analyses were carried out using techniques of AAS (Atomic Absorption Spectrometry) and ICP- AES (Inductively Coupled Plasma-Atomic Emission Spectrometry) with the final results based on ICP analysis.
- AAS Atomic Absorption Spectrometry
- ICP- AES Inductively Coupled Plasma-Atomic Emission Spectrometry
- the diluted impregnant was determined and the concentrations of boron, zinc and copper were 10.63g/L, 27.11g/L and 36.55g/L respectively. • The determined concentration of the impregnant was used to calculate the mass balance.
- the four blocks were quantitatively powdered, homogenised and dried at 100°C for 2 hours before analysis .
- the leaching was carried out in a similar way to that in the other examples although different vacuums were used.
- the amount of water used was 50 ml per block, and the total amount of water used was 500 ml. The loss of water to the uptake was re-added.
- Impregnant, Leachates and Digested Blocks after Leaching All the analyses were carried out using techniques of AAS (Atomic Absorption Spectrometry) and ICP- AES (Inductively Coupled Plasma-Atomic Emission Spectrometry) with the final results based on ICP analysis.
- AAS Atomic Absorption Spectrometry
- ICP- AES Inductively Coupled Plasma-Atomic Emission Spectrometry
- the impregnant was diluted to an appropriate concentration that is within the working range of the analytical instrument.
- the diluted impregnant was determined and the concentrations of boron, zinc and copper are 5.61g/L, 21.25g/L and 48.07g/L respectively.
- Example 5 Fluorine is an important component of Example 4 in which it contributes additional synergistic efficacy.
- the formulation utilised in Example 5 was prepared with a lower boron concentration. This constitutes one of several preservative compositions purposely formulated to result in a lower boron retention in timber and other treated commodities which are to be used above ground and especially in building, walkway, bush tracks and numerous other constructions . Especially useful in indoor environments, such compositions will constitute economic protection without any less or reduction in efficacy.
- the preservative composition was first prepared as detailed in Example 1. 1551 grams of this solution were slowly combined with 30 grams of N-alkyl tallow N dimethyl amino propyl N trimethyl ammonium dichloride in isopropanol water solution. This composition was agitated for several hours until a clear solution was produced. The solution was made up to 2000 grams, by addition of double distilled water. The pH of this composition was determined as 12.6.
- Quaternary ammonium salts have long been known to exhibit high surface activity coupled with biological and fungicidal efficacy. Such complex compositions have usually been used to formulate emulsions of cationic nature at low pH. These unique properties have been retained in this complex wood preservative composition. Penetration and distribution in treated timber have been enhanced and complemented by additional efficacy and boron fixation. However, boron diffusion and movement within the treated commodity has not been hindered, nor fixation rendered so efficient as to hinder efficacy. More surprising and wholly unexpected is the enhanced biocidal efficacy and composition stability in an alkaline environment.
- Vacuum was applied to the pressure vessel containing the treated blocks for 30 minutes, and a vacuum of 1.9 kPa was reached before the vacuum was released.
- the amount of water used was 50 ml per block, and the total amount of water used was 500 ml. The loss of water to the uptake was re-added. • Once the leaching was commenced, the leachant was changed at the intervals of 6 hours, 24 hours and every 48 hours afterwards, and the leachates were collected for analysis.
- the impregnant was diluted to an appropriate concentration that is within the working range of the analytical instrument.
- the diluted impregnant was determined and the concentrations of boron, zinc and copper are 4.43g/L, 17.07g/L and 42.32g/L respectively.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU4209401A AU4209401A (en) | 2000-03-24 | 2001-03-23 | Preserving compositions |
EP01914823A EP1282491A4 (en) | 2000-03-24 | 2001-03-23 | Preserving compositions |
CA002417670A CA2417670A1 (en) | 2000-03-24 | 2001-03-23 | Preserving compositions |
AU2001242094A AU2001242094B2 (en) | 2000-03-24 | 2001-03-23 | Preserving compositions |
NZ522185A NZ522185A (en) | 2000-03-24 | 2001-03-23 | Use of boron and zinc mixtures as preserving compositions |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AUPQ6449 | 2000-03-24 | ||
AUPQ6449A AUPQ644900A0 (en) | 2000-03-24 | 2000-03-24 | Preserving compositions |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001070472A1 true WO2001070472A1 (en) | 2001-09-27 |
Family
ID=3820546
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AU2001/000325 WO2001070472A1 (en) | 2000-03-24 | 2001-03-23 | Preserving compositions |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1282491A4 (en) |
AU (2) | AUPQ644900A0 (en) |
CA (1) | CA2417670A1 (en) |
NZ (1) | NZ522185A (en) |
WO (1) | WO2001070472A1 (en) |
ZA (1) | ZA200208584B (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6896908B2 (en) | 2001-01-30 | 2005-05-24 | U.S. Borax Inc. | Wood preservative concentrate |
US7470313B2 (en) | 2004-04-03 | 2008-12-30 | Pq Corporation | Amino acid-solubilized borate, silicate and zinc compositions and methods for treating wood products |
US7497900B2 (en) | 2004-04-03 | 2009-03-03 | Pq Corporation | Two-part borate, silicate and zinc compositions, and methods for treating wood products |
US7547354B2 (en) | 2004-04-03 | 2009-06-16 | Pq Corporation | Ammoniacal borate and zinc compositions, and methods for treating wood products |
CN105196381A (en) * | 2015-08-27 | 2015-12-30 | 福建省漳平木村林产有限公司 | Zinc borate corrosion preventing and flame retarding agent |
CN114474267A (en) * | 2022-02-26 | 2022-05-13 | 漳州市桥头木业有限公司 | Corrosion-resistant plywood and preparation method thereof |
WO2022198051A1 (en) * | 2021-03-19 | 2022-09-22 | Arxada, LLC | Zinc and boron containing enhanced wood preservative |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1992018007A1 (en) * | 1991-04-12 | 1992-10-29 | Saneish Pty. Ltd. | Production of shaped bodies which have fungicidal and insecticidal properties |
EP0636461A1 (en) * | 1993-07-28 | 1995-02-01 | Kabushiki Kaisha Koshii Preserving | A wood preservative composition, process for treating wood with the same, and wood treated with the same |
EP0450568B1 (en) * | 1990-04-03 | 1995-08-02 | Kabushiki Kaisha Koshii Preserving | A wood preservative composition, process for treating wood with the same, and wood treated with the same |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB139974A (en) * | 1919-06-11 | 1920-03-18 | Alphonse Lambert | Process for hardening and preserving permeable soft woods |
US2194827A (en) * | 1936-06-29 | 1940-03-26 | Gordon Aaron | Impregnating material for preserving wood |
DE3742834A1 (en) * | 1987-12-17 | 1989-07-13 | Wolman Gmbh Dr | WOOD PRESERVATIVES |
-
2000
- 2000-03-24 AU AUPQ6449A patent/AUPQ644900A0/en not_active Abandoned
-
2001
- 2001-03-23 EP EP01914823A patent/EP1282491A4/en not_active Withdrawn
- 2001-03-23 NZ NZ522185A patent/NZ522185A/en unknown
- 2001-03-23 WO PCT/AU2001/000325 patent/WO2001070472A1/en not_active Application Discontinuation
- 2001-03-23 AU AU4209401A patent/AU4209401A/en active Pending
- 2001-03-23 CA CA002417670A patent/CA2417670A1/en not_active Abandoned
-
2002
- 2002-10-23 ZA ZA200208584A patent/ZA200208584B/en unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0450568B1 (en) * | 1990-04-03 | 1995-08-02 | Kabushiki Kaisha Koshii Preserving | A wood preservative composition, process for treating wood with the same, and wood treated with the same |
WO1992018007A1 (en) * | 1991-04-12 | 1992-10-29 | Saneish Pty. Ltd. | Production of shaped bodies which have fungicidal and insecticidal properties |
EP0636461A1 (en) * | 1993-07-28 | 1995-02-01 | Kabushiki Kaisha Koshii Preserving | A wood preservative composition, process for treating wood with the same, and wood treated with the same |
Non-Patent Citations (1)
Title |
---|
See also references of EP1282491A4 * |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6896908B2 (en) | 2001-01-30 | 2005-05-24 | U.S. Borax Inc. | Wood preservative concentrate |
US7470313B2 (en) | 2004-04-03 | 2008-12-30 | Pq Corporation | Amino acid-solubilized borate, silicate and zinc compositions and methods for treating wood products |
US7497900B2 (en) | 2004-04-03 | 2009-03-03 | Pq Corporation | Two-part borate, silicate and zinc compositions, and methods for treating wood products |
US7547354B2 (en) | 2004-04-03 | 2009-06-16 | Pq Corporation | Ammoniacal borate and zinc compositions, and methods for treating wood products |
CN105196381A (en) * | 2015-08-27 | 2015-12-30 | 福建省漳平木村林产有限公司 | Zinc borate corrosion preventing and flame retarding agent |
WO2022198051A1 (en) * | 2021-03-19 | 2022-09-22 | Arxada, LLC | Zinc and boron containing enhanced wood preservative |
CN114474267A (en) * | 2022-02-26 | 2022-05-13 | 漳州市桥头木业有限公司 | Corrosion-resistant plywood and preparation method thereof |
Also Published As
Publication number | Publication date |
---|---|
AUPQ644900A0 (en) | 2000-04-20 |
CA2417670A1 (en) | 2001-09-27 |
NZ522185A (en) | 2004-07-30 |
EP1282491A1 (en) | 2003-02-12 |
ZA200208584B (en) | 2003-10-23 |
EP1282491A4 (en) | 2004-12-29 |
AU4209401A (en) | 2001-10-03 |
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