NO175929B - Method of preserving wood - Google Patents
Method of preserving wood Download PDFInfo
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- NO175929B NO175929B NO894379A NO894379A NO175929B NO 175929 B NO175929 B NO 175929B NO 894379 A NO894379 A NO 894379A NO 894379 A NO894379 A NO 894379A NO 175929 B NO175929 B NO 175929B
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- Prior art keywords
- wood
- treated
- copper
- aqueous solution
- treatment
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- 239000002023 wood Substances 0.000 title claims description 24
- 238000000034 method Methods 0.000 title claims description 8
- GSFSVEDCYBDIGW-UHFFFAOYSA-N 2-(1,3-benzothiazol-2-yl)-6-chlorophenol Chemical compound OC1=C(Cl)C=CC=C1C1=NC2=CC=CC=C2S1 GSFSVEDCYBDIGW-UHFFFAOYSA-N 0.000 claims description 12
- 239000005749 Copper compound Substances 0.000 claims description 7
- 150000001880 copper compounds Chemical class 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 4
- OEGYSQBMPQCZML-UHFFFAOYSA-M azanium;copper(1+);carbonate Chemical compound [NH4+].[Cu+].[O-]C([O-])=O OEGYSQBMPQCZML-UHFFFAOYSA-M 0.000 claims description 3
- PNWFFTWFSDDZTE-UHFFFAOYSA-N 2-aminoethanol;copper Chemical compound [Cu].NCCO PNWFFTWFSDDZTE-UHFFFAOYSA-N 0.000 claims description 2
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 claims description 2
- 229910000365 copper sulfate Inorganic materials 0.000 claims 1
- 239000007864 aqueous solution Substances 0.000 description 18
- 238000011282 treatment Methods 0.000 description 16
- DKVNPHBNOWQYFE-UHFFFAOYSA-N carbamodithioic acid Chemical compound NC(S)=S DKVNPHBNOWQYFE-UHFFFAOYSA-N 0.000 description 11
- 239000000243 solution Substances 0.000 description 11
- 239000012990 dithiocarbamate Substances 0.000 description 10
- 235000005018 Pinus echinata Nutrition 0.000 description 9
- 241001236219 Pinus echinata Species 0.000 description 9
- 235000011334 Pinus elliottii Nutrition 0.000 description 9
- 235000017339 Pinus palustris Nutrition 0.000 description 9
- 235000008566 Pinus taeda Nutrition 0.000 description 9
- 208000006990 cholangiocarcinoma Diseases 0.000 description 6
- 208000009854 congenital contractural arachnodactyly Diseases 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 239000003139 biocide Substances 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 229910000366 copper(II) sulfate Inorganic materials 0.000 description 5
- 229910052785 arsenic Inorganic materials 0.000 description 4
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 4
- 239000003755 preservative agent Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000003115 biocidal effect Effects 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 150000001879 copper Chemical class 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 238000011221 initial treatment Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000010875 treated wood Substances 0.000 description 2
- VADKRMSMGWJZCF-UHFFFAOYSA-N 2-bromophenol Chemical class OC1=CC=CC=C1Br VADKRMSMGWJZCF-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 241000238631 Hexapoda Species 0.000 description 1
- 241000256602 Isoptera Species 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 206010028400 Mutagenic effect Diseases 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 125000005210 alkyl ammonium group Chemical group 0.000 description 1
- 238000010171 animal model Methods 0.000 description 1
- 150000001642 boronic acid derivatives Chemical class 0.000 description 1
- 150000008280 chlorinated hydrocarbons Chemical class 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- ZOUQIAGHKFLHIA-UHFFFAOYSA-L copper;n,n-dimethylcarbamodithioate Chemical compound [Cu+2].CN(C)C([S-])=S.CN(C)C([S-])=S ZOUQIAGHKFLHIA-UHFFFAOYSA-L 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002291 fetotoxic effect Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000011121 hardwood Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 231100000243 mutagenic effect Toxicity 0.000 description 1
- 230000003505 mutagenic effect Effects 0.000 description 1
- 125000005608 naphthenic acid group Chemical group 0.000 description 1
- 230000002246 oncogenic effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- 230000001850 reproductive effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
Landscapes
- Chemical And Physical Treatments For Wood And The Like (AREA)
Description
Foreliggende oppfinnelse vedrører en ny fremgangsmåte for konservering av tre i dets naturlige og rekonstituerte form. The present invention relates to a new method for preserving wood in its natural and reconstituted form.
Det er et velkjent faktum at markedet tilbyr et stort antall trekonserveringsmidler som anvendes i en eller annen form for å tilveiebringe beskyttelse mot tre-ødeleggende organismer. Nesten halvparten av alt behandlet tre behandles imidlertid med sure sammensetninger av kobber, krom og arsenikk, det vil si CCA-konserveringsmidler. Samtidig som CCÅ gir uvanlig god beskyttelse mot råte og insekter til relativt lav pris, er mange ulemper forbundet med midlenes forsatte anvendelse. It is a well-known fact that the market offers a large number of wood preservatives which are used in one form or another to provide protection against wood-destroying organisms. However, almost half of all treated wood is treated with acidic compounds of copper, chromium and arsenic, i.e. CCA preservatives. At the same time that CCÅ provides unusually good protection against rot and insects at a relatively low price, there are many disadvantages associated with the agents' continued use.
CCA-behandlinger gir treet en grønn fargetone og dette er uønsket for mange anvendelser. Dette uorganiske konser-veringsmidlet hindrer ikke mugg og visse andre fargende organismer fra å vokse på treet. Harde treslag som er behandlet med CCA er særlig utsatt for myk råte. Når CCA-behandlede trær brennes kan giftige gasser frigjøres og asken kan inneholde farlig høye innhold av vannoppløselig arsenikk. EPA har funnet at pesticide produkter som inneholder uorganisk arsenikk overtrer risikovilkårene som er aktuelle med hensyn på onkogene effekter, mutagene effekter samt reproduktive eller fetotoksiske effekter på forsøksdyr av arter av pattedyr. CCA treatments give the wood a green tint and this is undesirable for many applications. This inorganic preservative does not prevent mold and certain other staining organisms from growing on the wood. Hardwoods that have been treated with CCA are particularly susceptible to soft rot. When CCA-treated trees are burned, toxic gases can be released and the ash can contain dangerously high levels of water-soluble arsenic. EPA has found that pesticide products containing inorganic arsenic violate the relevant risk criteria with regard to oncogenic effects, mutagenic effects, and reproductive or fetotoxic effects on laboratory animals of mammalian species.
Fra en synsvinkel er foreliggende oppfinnelse rettet mot en to-trinnfremgangsmåte for konservering av tre, som er kjennetegnet ved at man (a) i et trinn under trykk bringer treet i kontakt med en flytende sammensetning inneholdende en biocid: effektiv mengde av en kobberforbindelse valgt fra gruppen kobberammoniumkarbonat, kobber-sulfat og et kobber-etanolaminkompleks, og (b) i et separat trinn under trykk bringer treet i kontakt med en annen sammensetning inneholdende en * From one point of view, the present invention is directed to a two-step process for the preservation of wood, which is characterized by (a) in a step under pressure bringing the wood into contact with a liquid composition containing a biocide: effective amount of a copper compound selected from the group of copper ammonium carbonate, copper sulphate and a copper ethanolamine complex, and (b) in a separate step under pressure, contacting the wood with another composition containing a *
"biocid effektiv mengde av natriumdimetylditiokarbamat. "biocidally effective amount of sodium dimethyldithiocarbamate.
Kobberforbindelsen kan oppløses i en hvilken som helst egnet væske, f.eks. vann eller et hydrokarbon. Mengden kobberforbindelse bør fortrinnsvis ligger over den mengden som kreves for omsetning med alt ditiokarbamat for å danne et kobbersalt av ditiokarbamat, f.eks. kobberdimetylditiokarbamat. Dette kan lett bestemmes ved rutineforsøk. The copper compound can be dissolved in any suitable liquid, e.g. water or a hydrocarbon. The amount of copper compound should preferably be above the amount required for reaction with all the dithiocarbamate to form a copper salt of the dithiocarbamate, e.g. copper dimethyldithiocarbamate. This can easily be determined by routine testing.
Ditiokarbamatet kan oppløses i vann, et klorert hydrokarbon eller en hvilken som helst væske som letter ditiokarbamatets inntrengning i treet. The dithiocarbamate can be dissolved in water, a chlorinated hydrocarbon or any liquid that facilitates the penetration of the dithiocarbamate into the wood.
Ditiokarbamatet danner vannoppløselige salter eller chelater når det bringes i kontakt med kobberforbindelsen. The dithiocarbamate forms water-soluble salts or chelates when brought into contact with the copper compound.
Rekkefølgen for de to trinnene kan varieres. Enten kobber-biocidet eller di t ijokarbamat-biocidet kan anvendes i det første trinnet. Avgjørelsen om hvilket som anvendes i det første trinnet kan avhenge av det speseille treet som skal behandles, tilgjengelig utstyr, anvendt oppløsningsmiddel osv. Ved enkle forsøk kan man avgjøre hvilke kjemikalier som fortrinnsvis skal anvendes i det første trinnet. I noen forsøk er det funnet fordelaktig å anvende kobberforbindelsen først, idet denne trenger dypere inn i treet. The order of the two steps can be varied. Either the copper biocide or the dithiocarbamate biocide can be used in the first step. The decision as to which is used in the first step may depend on the particular wood to be treated, available equipment, solvent used, etc. By simple experiments one can decide which chemicals should preferably be used in the first step. In some trials, it has been found advantageous to apply the copper compound first, as this penetrates deeper into the wood.
Foreliggende to-trinnsfremgangsmåte krever ekstra utstyr, men dette blir mer enn kompensert av muligheten for å tilby tre som er vakkert og værbestandig, hvilket ikke er mulig å oppnå med én eneste CCA-behandling. Brune fargetoner av varierende intensitet kan lett oppnås. Ved tilsetning av oljer ved den avsluttende behandlingen oppfanges de beste egenskapene ved både olje- og vannbaserte konserveringsmidler. The present two-step process requires additional equipment, but this is more than compensated for by the ability to provide wood that is beautiful and weather resistant, which cannot be achieved with a single CCA treatment. Brown hues of varying intensity can be easily achieved. By adding oils during the final treatment, the best properties of both oil- and water-based preservatives are captured.
De to behandlingene tilveiebringes ved hjelp av trykk. Kjemikalienes tilbakeholdelse i treet avhenger av mange faktorer, så som behandlingsoppløsningens konsentrasjon, behandlingsfremgangsmåten og treets tilstand før behandlingen. Det er mulig å tørke treet etter begynnelsesbehandlingen og før den andre behandlingen, men det er klart for fagmannen på området at anvendelse av en behandling med "tom celle" for begynnelsesbehandlingen i stor grad oppfyller samme formål. The two treatments are provided using pressure. The retention of the chemicals in the wood depends on many factors, such as the concentration of the treatment solution, the treatment method and the condition of the wood before the treatment. It is possible to dry the wood after the initial treatment and before the second treatment, but it is clear to those skilled in the art that using an "empty cell" treatment for the initial treatment largely fulfills the same purpose.
Kobberkomplekser av ditiokarbamatet som dannes som en følge av to-trinnsfremgangsmåten har brunaktig fargetone. Kombi-nasjonen av kobber med natriumdimetylditiokarbamat gir en spesielt behagelig brun fargetone. Når fargeutviklingen er av primær betydning er det ønskelig å anvende ditiokarbamat-sammensetningen i den endelige behandlingen. Copper complexes of the dithiocarbamate formed as a result of the two-step process have a brownish hue. The combination of copper with sodium dimethyldithiocarbamate gives a particularly pleasant brown hue. When color development is of primary importance, it is desirable to use the dithiocarbamate composition in the final treatment.
Sammensetningene og behandlingsfremgangsmåtene ifølge foreliggende oppfinnelse opphever flere av ulempene ved CCA-behandling uten alvorlig økning av kostnaden for det behandlede treet. Når foreliggende oppfinnelse utøves i praksis kan treet gis en behagelig brun fargetone, over-flatesoppvekst og mykråte kan hemmes, samtidig som behovet for uorganisk arsenikk ved behandlingene elimineres. The compositions and treatment methods according to the present invention eliminate several of the disadvantages of CCA treatment without seriously increasing the cost of the treated wood. When the present invention is put into practice, the wood can be given a pleasant brown hue, surface growth and soft rot can be inhibited, while the need for inorganic arsenic in the treatments is eliminated.
Foruten kobberforbindelsen og ditiokarbamatet kan trebehand-1ingssammensetningene som anvendes ved oppfinnelsen også inneholde kjente trebehandlingsmidler som naftensyrer, alkylammoniumforbindelser osv. Besides the copper compound and the dithiocarbamate, the wood treatment compositions used in the invention can also contain known wood treatment agents such as naphthenic acids, alkylammonium compounds, etc.
Brannbeskyttelsesegenskaper kan tilveiebringes i treet på mange forskjellige måter. Fosfater, borater og bromfenoler kan innføres sammen med visse kobberbiocider. Disse forbind-elser kan alternativt innbefattes sammen med ditiokarbamatet . Fire protection properties can be provided in wood in many different ways. Phosphates, borates and bromophenols can be introduced together with certain copper biocides. These compounds can alternatively be included together with the dithiocarbamate.
Oljer for vannimpregnering og værimpregnering kan emulgeres inn i ditiokarbamatoppløsningen. Kobberbiocider oppløst i tunge oljer og anvendt for den endelige behandlingen gir treet spesielt gode værbestandige egenskaper. Oils for water impregnation and weather impregnation can be emulsified into the dithiocarbamate solution. Copper biocides dissolved in heavy oils and used for the final treatment give the wood particularly good weather-resistant properties.
EKSEMPEL 1 EXAMPLE 1
I et første trinn ble en stamme av såkalt Southern Yellow Pine behandlet med en 2,5 % vannholdig oppløsning av kobberammoniumkarbonat 8 % EPA registrering nr. 10465-3. Når denne oppløsningen var trengt inn i treet ble det senere behandlet i et andre trinn med en 0,28 % vannholdig oppløsning av natriumdimetylditiokarbamat. In a first step, a trunk of so-called Southern Yellow Pine was treated with a 2.5% aqueous solution of copper ammonium carbonate 8% EPA Registration No. 10465-3. Once this solution had penetrated the wood, it was later treated in a second step with a 0.28% aqueous solution of sodium dimethyldithiocarbamate.
EKSEMPEL 2 EXAMPLE 2
I et første trinn behandles en stamme av såkalt Southern Yellow Pine med en 0,4 5é vannholdig oppløsning av natriumdimetylditiokarbamat. Når denne oppløsningen er trengt fullstendig inn behandles stammen i et andre trinn med en 0,1 ia vannholdig oppløsning av CuS04*5H20. In a first step, a trunk of so-called Southern Yellow Pine is treated with a 0.4 5e aqueous solution of sodium dimethyldithiocarbamate. When this solution has completely penetrated, the stem is treated in a second step with a 0.1 ia aqueous solution of CuS04*5H20.
EKSEMPEL 3 EXAMPLE 3
I et første trinn behandles en stamme av såkalt Southern Yellow Pine med en 0,4 % vannholdig oppløsning av natriumdimetylditiokarbamat. Når denne oppløsningen er trengt fullstendig inn behandles stammen i et andre trinn med en 4,0 % vannholdig oppløsning av CuS04"5H20. In a first step, a trunk of so-called Southern Yellow Pine is treated with a 0.4% aqueous solution of sodium dimethyldithiocarbamate. When this solution has completely penetrated, the stem is treated in a second step with a 4.0% aqueous solution of CuS04"5H20.
EKSEMPEL 4 EXAMPLE 4
I et første trinn behandles en stamme av såkalt Southern Yellow Pine med en 0,8 $ vannholdig oppløsning av natriumdimetylditiokarbamat. Når denne oppløsningen er trengt fullstendig inn behandles stammen i et andre trinn med en 2,0 % vannholdig oppløsning av CuS04"5H20. In a first step, a trunk of so-called Southern Yellow Pine is treated with a 0.8$ aqueous solution of sodium dimethyldithiocarbamate. When this solution has completely penetrated, the stem is treated in a second step with a 2.0% aqueous solution of CuS04"5H20.
EKSEMPEL 5 EXAMPLE 5
I et første trinn behandles en stamme av såkalt Southern Yellow Pine med en 0,8 % vannholdig oppløsning av natriumdimetylditiokarbamat. Når denne oppløsningen er trengt fullstendig inn behandles stammen i et andre trinn med en 1,0 % vannholdig oppløsning av CuSO^SHgO. In a first step, a trunk of so-called Southern Yellow Pine is treated with a 0.8% aqueous solution of sodium dimethyldithiocarbamate. When this solution has completely penetrated, the stem is treated in a second step with a 1.0% aqueous solution of CuSO^SHgO.
EKSEMPEL 6 EXAMPLE 6
I et første trinn behandles en stamme av såkalt Southern Yellow Pine med en 1, 2 % vannholdig oppløsning av natriumdimetylditiokarbamat. Når denne oppløsningen er trengt fullstendig inn behandles stammen i et andre trinn med en 1,0 % vannholdig oppløsning av CuSO^S^O. In a first step, a trunk of so-called Southern Yellow Pine is treated with a 1.2% aqueous solution of sodium dimethyldithiocarbamate. When this solution has completely penetrated, the stem is treated in a second step with a 1.0% aqueous solution of CuSO^S^O.
EKSEMPEL 7 EXAMPLE 7
I et første trinn behandles en stamme av såkalt Southern Yellow Pine med en 1,2 % vannholdig oppløsning av natriumdimetylditiokarbamat. Når denne oppløsningen er trengt tilstrekkelig inn behandles stammen i et andre trinn med en 0,5 % vannholdig oppløsning av CuS04*5H20. In a first step, a trunk of so-called Southern Yellow Pine is treated with a 1.2% aqueous solution of sodium dimethyldithiocarbamate. When this solution has penetrated sufficiently, the stem is treated in a second step with a 0.5% aqueous solution of CuS04*5H20.
EKSEMPEL 8 EXAMPLE 8
I et første trinn behandles stammer av såkalt Southern Yellow Pine med en 1,0 % vannholdige oppløsninger av CuSC^SHgO. Når denne oppløsningen har trengt inn i stammene behandles treet i et andre trinn med en vannholdig oppløsning av natriumdimetylditiokarbamat av forskjellige konsentrasjoner som varierer fra 0,121 til 4,0 In a first step, logs of so-called Southern Yellow Pine are treated with a 1.0% aqueous solution of CuSC^SHgO. When this solution has penetrated the trunks, the tree is treated in a second step with an aqueous solution of sodium dimethyldithiocarbamate of different concentrations varying from 0.121 to 4.0
EKSEMPEL 9 EXAMPLE 9
I et første trinn behandles stammer av såkalt Southern Yellow Pine med 2,0 % vannholdige oppløsninger av CuS04<*>5H20. Når denne oppløsningen har trengt inn i stammene behandles treet i et andre trinn med vannholdige oppløsninger av natriumdimetylditiokarbamat av forskjellig konsentrasjon, som varierer fra 0,2 til 4,0 %. In a first step, logs of so-called Southern Yellow Pine are treated with 2.0% aqueous solutions of CuS04<*>5H20. When this solution has penetrated the trunks, the tree is treated in a second step with aqueous solutions of sodium dimethyldithiocarbamate of different concentrations, which vary from 0.2 to 4.0%.
Stammene i alle de ovenstående eksemplene hadde god mot-standskraft mot råte og termitter og hemmet flekkdannelse og muggvekst. The strains in all the above examples had good resistance to rot and termites and inhibited spotting and mold growth.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO894379A NO175929C (en) | 1989-11-03 | 1989-11-03 | Method of preserving wood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO894379A NO175929C (en) | 1989-11-03 | 1989-11-03 | Method of preserving wood |
Publications (4)
| Publication Number | Publication Date |
|---|---|
| NO894379D0 NO894379D0 (en) | 1989-11-03 |
| NO894379L NO894379L (en) | 1991-05-06 |
| NO175929B true NO175929B (en) | 1994-09-26 |
| NO175929C NO175929C (en) | 1995-01-04 |
Family
ID=19892544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO894379A NO175929C (en) | 1989-11-03 | 1989-11-03 | Method of preserving wood |
Country Status (1)
| Country | Link |
|---|---|
| NO (1) | NO175929C (en) |
-
1989
- 1989-11-03 NO NO894379A patent/NO175929C/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| NO894379L (en) | 1991-05-06 |
| NO894379D0 (en) | 1989-11-03 |
| NO175929C (en) | 1995-01-04 |
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