GB2114003A - Wood preserving tablet - Google Patents
Wood preserving tablet Download PDFInfo
- Publication number
- GB2114003A GB2114003A GB08302138A GB8302138A GB2114003A GB 2114003 A GB2114003 A GB 2114003A GB 08302138 A GB08302138 A GB 08302138A GB 8302138 A GB8302138 A GB 8302138A GB 2114003 A GB2114003 A GB 2114003A
- Authority
- GB
- United Kingdom
- Prior art keywords
- boric
- tablet according
- parts
- weight
- tablet
- Prior art date
- 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
Links
- 239000002023 wood Substances 0.000 title claims abstract description 7
- 150000001639 boron compounds Chemical class 0.000 claims abstract description 14
- 235000010338 boric acid Nutrition 0.000 claims abstract description 12
- 150000001642 boronic acid derivatives Chemical class 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 8
- 125000005619 boric acid group Chemical class 0.000 claims abstract description 6
- -1 (a) borates Chemical class 0.000 claims abstract description 3
- 150000001875 compounds Chemical class 0.000 claims abstract description 3
- 229910011255 B2O3 Inorganic materials 0.000 claims description 9
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 claims description 9
- 235000010339 sodium tetraborate Nutrition 0.000 claims description 9
- 229910021538 borax Inorganic materials 0.000 claims description 7
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 7
- 229960002645 boric acid Drugs 0.000 claims description 7
- UQGFMSUEHSUPRD-UHFFFAOYSA-N disodium;3,7-dioxido-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane Chemical compound [Na+].[Na+].O1B([O-])OB2OB([O-])OB1O2 UQGFMSUEHSUPRD-UHFFFAOYSA-N 0.000 claims description 6
- 239000004328 sodium tetraborate Substances 0.000 claims description 6
- 229920002472 Starch Polymers 0.000 claims description 5
- 235000019698 starch Nutrition 0.000 claims description 5
- 239000008107 starch Substances 0.000 claims description 5
- 239000011230 binding agent Substances 0.000 claims description 4
- 239000004327 boric acid Substances 0.000 claims description 3
- XDVOLDOITVSJGL-UHFFFAOYSA-N 3,7-dihydroxy-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane Chemical compound O1B(O)OB2OB(O)OB1O2 XDVOLDOITVSJGL-UHFFFAOYSA-N 0.000 claims description 2
- CDMADVZSLOHIFP-UHFFFAOYSA-N disodium;3,7-dioxido-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane;decahydrate Chemical compound O.O.O.O.O.O.O.O.O.O.[Na+].[Na+].O1B([O-])OB2OB([O-])OB1O2 CDMADVZSLOHIFP-UHFFFAOYSA-N 0.000 claims description 2
- STNGULMWFPMOCE-UHFFFAOYSA-N ethyl 4-butyl-3,5-dimethyl-1h-pyrrole-2-carboxylate Chemical compound CCCCC1=C(C)NC(C(=O)OCC)=C1C STNGULMWFPMOCE-UHFFFAOYSA-N 0.000 claims description 2
- VGTPKLINSHNZRD-UHFFFAOYSA-N oxoborinic acid Chemical compound OB=O VGTPKLINSHNZRD-UHFFFAOYSA-N 0.000 claims description 2
- NVIFVTYDZMXWGX-UHFFFAOYSA-N sodium metaborate Chemical compound [Na+].[O-]B=O NVIFVTYDZMXWGX-UHFFFAOYSA-N 0.000 claims description 2
- JAKYJVJWXKRTSJ-UHFFFAOYSA-N sodium;oxido(oxo)borane;tetrahydrate Chemical compound O.O.O.O.[Na+].[O-]B=O JAKYJVJWXKRTSJ-UHFFFAOYSA-N 0.000 claims description 2
- QRVKEZKWTRTGIK-UHFFFAOYSA-N OB(O)O.OB(O)O.OB(O)O.OB(O)O.OB(O)O Chemical compound OB(O)O.OB(O)O.OB(O)O.OB(O)O.OB(O)O QRVKEZKWTRTGIK-UHFFFAOYSA-N 0.000 claims 1
- 241000238631 Hexapoda Species 0.000 description 5
- 241000233866 Fungi Species 0.000 description 4
- 230000002538 fungal effect Effects 0.000 description 4
- GDTSJMKGXGJFGQ-UHFFFAOYSA-N 3,7-dioxido-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane Chemical compound O1B([O-])OB2OB([O-])OB1O2 GDTSJMKGXGJFGQ-UHFFFAOYSA-N 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- 230000003466 anti-cipated effect Effects 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 238000011282 treatment Methods 0.000 description 2
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 1
- 241000607479 Yersinia pestis Species 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 150000004691 decahydrates Chemical class 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 125000001145 hydrido group Chemical group *[H] 0.000 description 1
- 230000000749 insecticidal effect Effects 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- BSVBQGMMJUBVOD-UHFFFAOYSA-N trisodium borate Chemical compound [Na+].[Na+].[Na+].[O-]B([O-])[O-] BSVBQGMMJUBVOD-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Wood Science & Technology (AREA)
- Inorganic Chemistry (AREA)
- Dentistry (AREA)
- Health & Medical Sciences (AREA)
- Plant Pathology (AREA)
- Pest Control & Pesticides (AREA)
- General Health & Medical Sciences (AREA)
- Agronomy & Crop Science (AREA)
- Zoology (AREA)
- Environmental Sciences (AREA)
- Forests & Forestry (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
A wood preserving tablet comprising a mixture containing at least two boron compounds, selected from any two of the three groups of boron compounds namely (a) borates, (b) boric acids and (c) boric oxides. Preferably the tablet comprises at least three compounds, one being selected from each of the three groups of boron compounds. The choice of boron compounds permits a tablet to be formulated effectively for a long period against a varied attack.
Description
SPECIFICATION
Wood preserving tablet
The present invention relates to tablets intended for insertion into timber in order to preserve the same by combating attack by decay fungi or wood boring insects. As will be apparent from the further description herein, the tablets of the present invention can also be used, should the need arise, in masonry or other locations in order to limit or inhibit the spread of fungi. The term "tablet" is used herein to define a body which is formed and shaped by compaction and does not in any way limit the shape of such body.
In the field of timber preservation, boron compounds are well known for their ability to preserve the timber from attack by most fungi, with the possible exception of that causing "blue stain" and from attack by the majority of the wood-boring insects that are likely to be met.
However, in order to be effective, the boron concentration must be maintained at the appropriate level having regard to the form the attack might take, but preferably also the boron is present in a combined form most suitable for the purpose in mind. Thus, it will be known that if the boron compounds are to be used to minimise attack by wood-boring insects sodium borate and boric acid have different effectiveness, depending upon the nature and age of the pest.
It has previously been proposed in United
Kingdom Patent 2008640 to preserve timber by inserting a plug of fused boric oxide into a preformed bore in the timber. Clearly, such an arrangement is designed primarily to deal with locations where an attack can be anticipated rather than to deal with the generalised problem of attack. In general such vulnerable locations are readily defined and the normal form of attack is a fungal attack although insect attack may precede the fungal attack and render it more serious.
Unfortunately, rods of fused boric oxide are not easy to manufacture on an industrial scale since they have to be made by casting, and they tend to have unsuitable mechanical properties.
Accordingly, it is an object of the present invention to provide a wood-preserving tablet primarily for dealing with localised attack.
According to the present invention, there is provided a wood preserving tablet comprising a mixture containing at least two boron compounds, selected from any two of the three groups of boron compounds namely (a) borates, (b) boric acids and (c) boric oxides.
Very desirably the tablet comprises at least three boron compounds, one selected from each group.
Conveniently the group of borates consists of anhydrous sodium metaborate, sodium metaborate tetrahydrate, anhydrous sodium tetraborate, sodium tetraborate pentahydrate and sodium tetraborate decahydrate.
Conveniently the group of boric acids consists of metaboric acid, orthoboric acid and tetraboric acid.
Desirably glassy boric oxide is the selective boric oxide and is ground relatively finely in order to permit it to be incorporated in the tablets. It is therefore relatively slow to dissolve.
The preferred borate is sodium tetraborate. It is preferably in the an hydros form and therefore rapidly absorbs moisture found in the wood or other location of use, drying out its surroundings and forming a hydrated form of the tetraborate which then dissolves. For repeat treatments, the tetraborate may be present in the tablets in a hydrated form, e.g. as the decahydrate, in order that dissolution may be slower.
The ratio between the boric oxides and borates is therefore desirably chosen bearing in mind the desired speed of dissolution and the mix of boron compounds that is most desirable for the anticipated attack. Thus, depending upon the intended application, the ratio of boric oxides to boratesmaybefrom 10:1 to 1:10 or more desirably from 1:1 to 1:5 in parts by weight. For many purposes we have found that one part by weight of glassy boric oxide to 1.44 parts by weight of anhydrous sodium tetraborate is particularly satisfactory.
In addition to providing fungal and insecticidal properties, the boric acids function as a lubricant.
We prefer to use orthoboric acid, also known as boracic acid in amounts of from 5 to 20% by weight, preferably in amounts of from 7.5 to 1 5% of the total mix.
Any suitable binder, such as is known in the tableting art may be used if necessary, but we prefer to use a starch. The amount of binder which is necessary can readily be determined by anyone skilled in the tableting art, but we have found that 3% by weight of starch is satisfactory.
The physical dimensions of the tablets are of course not material to the present invention, but we have found that tablets of a diameter of 12.5 mm are very satisfactory. Using the above described mix we have manufactured tablets of this diameter in thicknesses ranging from 6 mm to 24 mm.
The tablets of the present invention are used by boring a hole into the timber or masonry of a diameter slightly in excess of the diameter of the tablets and to a depth appropriate to the location.
One or more tablets are then placed in the hole which may be left open or sealed as desired.
During use, the tablets will dissolve and the treatment may be continued by inserting more tablets in the same hole. Such further tablets may be of a different composition.
It will be known that boron compounds in solution diffuse rapidly through damp timber and provide desirable protection. The compounds can of course be leached out of the timber and due account must therefore be taken of the need to replace the tablets more rapidly in very damp situations or to use a different formulation.
As is apparent, the tablets of the present invention can be used effectively to impregnate timber in order to protect it against fungal or insect attack and quite clearly, can also be used to impregnate masonry in order to provide a barrier to the spread of fungi.
One preferred tablet comprises, in parts by weight:
glassy boric oxide 36
anhydrous sodium tetraborate 51
boric acid 10
starch 3
Claims (12)
1. A wood preserving tablet comprising a mixture cbntaining at least two boron compounds, selected from any two of the three groups of boron compounds namely (a) borates, (b) boric acids and (c) boric oxides.
2. A tablet according to claim 1 comprising at least three compounds, one being selected from each of the three groups of boron compounds.
3. A tablet according to claim 1 or 2, wherein the group of borates consists of anhydrous sodium metaborate, sodium metaborate tetrahydrate, anhydrous sodium tetraborate, sodium tetraborate pentahydrate and sodium tetraborate decahydrate.
4. A tablet according to any preceding claim, wherein the group of boric acids consists of metaboric acid, orthoboric acid and tetraboric acid.
5. A tablet according to any preceding claim, wherein the group of boric oxides consists of glassy boric oxide.
6. A tablet according to any preceding claim, wherein the ratio of boric oxides to borates is from 10:1 to 1 :10 in parts by weight.
7. A tablet according to claim 6, wherein the ratio of boric oxides to borates is from 1:1 to 1:5 in parts by weight.
8. A tablet according to claim 7, containing one part by weight of glassy boric oxide to 1.44 parts by weight of anhydrous sodium tetraborate.
9. A tablet according to any preceding claim, wherein the boric acid is present in amounts of from 5 to 20% by weight.
10. A tablet according to any preceding claim, also including a binder.
11. A tablet according to claim 10 wherein the binder is starch.
12. A tablet according to claim 1, comprising, in parts by weight,
glassy boric oxide 36 parts anhydroussodium 51 parts
tetraborate
boric acid 10 parts
starch 3 parts
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08302138A GB2114003B (en) | 1982-01-27 | 1983-01-26 | Wood preserving tablet |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8202250 | 1982-01-27 | ||
| GB08302138A GB2114003B (en) | 1982-01-27 | 1983-01-26 | Wood preserving tablet |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8302138D0 GB8302138D0 (en) | 1983-03-02 |
| GB2114003A true GB2114003A (en) | 1983-08-17 |
| GB2114003B GB2114003B (en) | 1985-07-31 |
Family
ID=26281810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08302138A Expired GB2114003B (en) | 1982-01-27 | 1983-01-26 | Wood preserving tablet |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2114003B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0152976A3 (en) * | 1984-02-03 | 1985-09-25 | Nederlandse Centrale Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek | Composition and process for the preservation of wood |
| EP0184663A1 (en) * | 1984-11-21 | 1986-06-18 | Bio-Kil Chemicals Limited | The production of shaped bodies of boron compounds |
| WO1989003287A1 (en) * | 1987-10-13 | 1989-04-20 | Manchem Limited | Preservative elements containing organic boron compounds and their use |
| EP0468150A1 (en) * | 1990-07-25 | 1992-01-29 | Rütgerswerke Aktiengesellschaft | Aqueous solutions with high boron content |
| US5564222A (en) * | 1993-12-03 | 1996-10-15 | Environmental Laboratories, Inc. | Method and articles for killing termites |
| US5612094A (en) * | 1995-10-18 | 1997-03-18 | U.S. Borax Inc. | Compositions and methods for preserving wood products |
| BG1066U1 (en) * | 2007-02-28 | 2008-06-30 | "Санита - Коста Чотов" Ет | Insecticide for cockroach extermination |
| GB2471858A (en) * | 2009-07-14 | 2011-01-19 | Chemtech Dev Pty Ltd | Method for forming a shaped body for use in timber preservation |
| AU2009200154B2 (en) * | 2008-01-15 | 2015-06-11 | Chemtech Development Pty Ltd | Process for preparing a shaped body |
-
1983
- 1983-01-26 GB GB08302138A patent/GB2114003B/en not_active Expired
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0152976A3 (en) * | 1984-02-03 | 1985-09-25 | Nederlandse Centrale Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek | Composition and process for the preservation of wood |
| EP0184663A1 (en) * | 1984-11-21 | 1986-06-18 | Bio-Kil Chemicals Limited | The production of shaped bodies of boron compounds |
| US4661157A (en) * | 1984-11-21 | 1987-04-28 | Laporte Industries Limited | Production of shaped bodies of boron compounds |
| WO1989003287A1 (en) * | 1987-10-13 | 1989-04-20 | Manchem Limited | Preservative elements containing organic boron compounds and their use |
| US4911988A (en) * | 1987-10-13 | 1990-03-27 | Manchem Limited | Preservative elements containing organic boron compounds and their use |
| EP0468150A1 (en) * | 1990-07-25 | 1992-01-29 | Rütgerswerke Aktiengesellschaft | Aqueous solutions with high boron content |
| US5564222A (en) * | 1993-12-03 | 1996-10-15 | Environmental Laboratories, Inc. | Method and articles for killing termites |
| US6286247B1 (en) | 1993-12-03 | 2001-09-11 | Environmental Laboratories, Inc. | Mulch and method for killing termites |
| US5612094A (en) * | 1995-10-18 | 1997-03-18 | U.S. Borax Inc. | Compositions and methods for preserving wood products |
| WO1997014303A1 (en) * | 1995-10-18 | 1997-04-24 | U.S. Borax Inc. | Compositions and methods for preserving wood products |
| BG1066U1 (en) * | 2007-02-28 | 2008-06-30 | "Санита - Коста Чотов" Ет | Insecticide for cockroach extermination |
| AU2009200154B2 (en) * | 2008-01-15 | 2015-06-11 | Chemtech Development Pty Ltd | Process for preparing a shaped body |
| GB2471858A (en) * | 2009-07-14 | 2011-01-19 | Chemtech Dev Pty Ltd | Method for forming a shaped body for use in timber preservation |
| GB2471858B (en) * | 2009-07-14 | 2013-12-04 | Chemtech Dev Pty Ltd | process for preparing a shaped body |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2114003B (en) | 1985-07-31 |
| GB8302138D0 (en) | 1983-03-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19950126 |