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WO1997007946A1 - Procede de traitement du bois - Google Patents

Procede de traitement du bois Download PDF

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Publication number
WO1997007946A1
WO1997007946A1 PCT/GB1996/002102 GB9602102W WO9707946A1 WO 1997007946 A1 WO1997007946 A1 WO 1997007946A1 GB 9602102 W GB9602102 W GB 9602102W WO 9707946 A1 WO9707946 A1 WO 9707946A1
Authority
WO
WIPO (PCT)
Prior art keywords
boric acid
timber
protein
borate
composition
Prior art date
Application number
PCT/GB1996/002102
Other languages
English (en)
Inventor
Antonio Pizzi
Albin Alexander Wladyslaw Baecker
Graham David Shelver
Original Assignee
Biotrans Uk Ltd.
Silvadux B.V.
Dr Wolman Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Biotrans Uk Ltd., Silvadux B.V., Dr Wolman Gmbh filed Critical Biotrans Uk Ltd.
Priority to AU68311/96A priority Critical patent/AU6831196A/en
Priority to EP96928590A priority patent/EP0850127A1/fr
Publication of WO1997007946A1 publication Critical patent/WO1997007946A1/fr

Links

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
    • B27K3/02—Processes; Apparatus
    • B27K3/0278—Processes; Apparatus involving an additional treatment during or after impregnation
    • B27K3/0292—Processes; Apparatus involving an additional treatment during or after impregnation for improving fixation
    • 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
    • B27K3/02—Processes; Apparatus
    • B27K3/15—Impregnating involving polymerisation including use of polymer-containing 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
    • B27K3/16—Inorganic impregnating agents
    • B27K3/163—Compounds of boron
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L97/00—Compositions of lignin-containing materials
    • C08L97/02—Lignocellulosic material, e.g. wood, straw or bagasse
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/38—Boron-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L79/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen or carbon only, not provided for in groups C08L61/00 - C08L77/00
    • C08L79/02—Polyamines

Definitions

  • THIS INVENTION relates to a method of treating timber and to a treatment
  • composition for use in this method is a composition for use in this method.
  • Boric acid is known to be an environmentally acceptable and effective termiticide/fungicide for use in the treatment of timber.
  • boric acid will quickly leach from the timber and, as such, become ineffective.
  • boric acid chemically reacting boric acid with amine groups of a substance selected from a group consisting of a synthetic substance and a biological substance, that can solidify through polymerisation and that contains an amine group component as a radical, thereby linking the active termiticide/fungicide component of the boric acid with the said selected substance via the amine group component;
  • the method may include inducing evaporation of the solvent and solidification of the said selected substance by the application of heat and optionally, to enhance solidification, by catalysis with the use of a suitable catalyst. Also, the method may include applying the solution to the timber in a manner that the timber is effectively penetrated by the solution.
  • the said selected substance may be a synthetic polymer in the form of a polyester including the primary amine group NH 2 .
  • the polyester particularly may be formed so that through its chemical reaction with boric acid, a polyester borate is formed.
  • the solution may be formed by dissolving the polyester borate in one of acetone and styrene acting as solvent.
  • the said selected substance may be a biological polymer in the form of a protein and through its reaction with boric acid the borate form of the protein is formed.
  • the protein typically is a denaturable protein in the form of egg white.
  • the solution including the borate form of the protein may be formed by dissolving the borate form of the protein in water.
  • the protein during its chemical reaction with boric acid, may be mixed with a second biological polymer, not containing an amine group, but with inherent fungicidal properties, that can simultaneously react with the boric acid, forming a water soluble, polymerisable, mixture of the protein borate and the borate form of the second biological polymer.
  • the second biological polymer may be a poiyflavonoid tannin, and the chemical reaction with the boric acid may provide a protein borate/tannin
  • the protein during its chemical reaction with boric acid, may be mixed with a water borne resin containing its own amine group, the water borne resin reacting simultaneously with the boric acid to form the borate form of the resin, which also is water soluble.
  • the water borne resin may be urea glyoxal.
  • the invention extends also to a composition for use in a method of fixing the active termiticide/fungicide component of boric acid with timber for treatment of the timber, which comprises the composition formed from chemically reacting boric acid with a substance that can solidify through polymerisation and that contains an amine group as a radical and through which chemical reaction the termiticide/fungicide component ofthe boric acid is linked with the said substance via the amine group.
  • the composition may be a synthetic polyester borate obtained from chemically reacting boric acid with a polyester including the primary amine group NH 2 .
  • This composition may include one of acetone and styrene as a solvent in which the synthetic polyester borate is dissolved.
  • the composition may be the borate form of a biological protein obtained from chemically reacting boric acid with the protein.
  • This composition may include water as a solvent in which the borate form of the biological protein is dissolved.
  • the composition may be the borate form of an inherently anti-fungal mixture of a biological protein and a biological but inherently anti-fungal poiyflavonoid tannin obtained from reacting boric acid with the protein and the poiyflavonoid tannin.
  • this composition may include water as a solvent in which the borate form of the biological protein and the poiyflavonoid tannin is dissolved.
  • the composition may be the borate form of a biological protein, a biological but inherently anti-fungal polymer, and a water borne resin containing its own amine group, obtained from reacting boric acid with the protein, the anti-fungal polymer and the water borne resin.
  • the anti-fungal polymer may be poiyflavonoid tannin while the water borne resin may be urea glyoxal.
  • this composition may include water as a solvent in which the borate form of the biological protein, the anti-fungal polymer and the water borne resin is dissolved.
  • the invention still further extends to a method of treating timber which includes providing the composition as defined above, dissolved in a solvent therefor, applying the solution to the timber to be treated and inducing evaporation of the solvent and solidification of the composition through polymerisation thereof.
  • evaporation of the solvent and solidification of the composition may be induced by exposing the timber to heat.
  • solidification of the composition may be induced by catalysis with the use of a suitable catalyst.
  • a method of fixing the active termiticide/fungicide component of boric acid with timber for the treatment of the timber includes firstly the step of chemically reacting boric acid with a synthetic polyester including the primary amine group NH 2 .
  • the polyester may be a two- component polyester, the individual components having the following structures:
  • the polyester including 20% of the structure A and 80% of the structure B.
  • the combined molecular weight is 230.
  • the molecular weight of boric acid (H 3 B O 3 ) is approximately 62 and as the polyester usually will be only 60% pure, 383 grams polyester will be required to be linked with 62g boric acid, provided that the boric acid behaves monoprotically. Although boric acid is triprotic, it is in fact suspected that within the above chemical reaction with polyester it will behave monoprotically.
  • R" - NH 2 + H 3 BO 3 > R" - NH 3 + H 2 BO 3 ' where R" represents the polyester.
  • the next step in the method of treating timber includes dissolving the polyester borate produced into an organic solvent such as acetone or styrene, the concentration of polyester borate being determined by the quantity of termiticide/fungicide to be fixed in the timber to be treated for the effective treatment thereof, as well as the 'porosity' of timber, i.e. the volume of Iiquid that can be forced into timber to ensure that the entire timber body is exposed to the Iiquid and, in practice, to the termiticide/fungicide.
  • This aspect clearly is greatly variable and may be determined by the type of timber to be treated and the purpose of treatment.
  • the Iiquid may include a standard catalyst, or a radical initiator such as cobalt, to catalyse solidification of the unsaturated polyester.
  • the actual application of the solution formed is conventional as for known timber treatment processes involving a Iiquid organic solvent borne termiticide/fungicide, or the like, the timber being exposed to heating subsequent to application in order to provide for the separation of the solvent via evaporation and the solidification of the polyester borate within the timber by polymerisation thereof.
  • timber can be effectively treated with the termiticide/fungicide component of boric acid, which is known to be particularly effective.
  • the said termiticide/fungicide component of the boric acid is effectively fixed within the timber, thus rendering treatment effective over extended periods of time, i.e. the termiticide/fungicide component of boric acid is rendered non-leachable while it still
  • the biological substance that can solidify through polymerisation and that contains an amine group component as a radical is a protein, e.g. a denaturable protein such as egg white.
  • Linking of the protein, which includes an amine group, with boric acid to form the borate form of the protein essentially can take place as before, with the protein borate form being soluble in water as a solvent, the water rendering the composition particularly environmentally acceptable.
  • the application of the dissolved protein borate is conventional as for known timber treatment processes involving a water borne Iiquid termiticide/fungicide, or the like and the heating of the timber can be carried out as before, once again providing for exposure of a complete timber body to the termiticide/fungicide component of boric acid while timber treated is at the same time somewhat hardened as a result of the polymerisation of the protein.
  • different proteins could be suitable for the above purpose as they all incorporate an amine group as part thereof.
  • an inherently fungicidal, biological mixture that can co-solidify through polymerisation and that contains an amine group component as a radical is provided, the mixture comprising a protein and inherently fungicidal poiyflavonoid tannin which can react with boric acid at the ether oxygen of the pyran ring of the flavonoid leading to condensation with a flavonoid in another tannin unit.
  • Linking of the protein, which contains the amine group, and poiyflavonoid tannin with boric acid to form the mixture of protein borate and tannin borate essentially can take place as before, with the protein borate/tannin borate mixture being soluble in water as a solvent, which is again environmentally unacceptable.
  • the application of the dissolved mixture of the borate form of protein and the borate form of tannin to timber and the heating of the timber can be carried out as before, once again providing for exposure of a complete timber body to the termiticide/fungicide component of the boric acid while timber treated is at the same time increasingly hardened as a result of the polymerisation and co-solidification of the protein/tannin mixture with cross ⁇ linking and networking of the material. It will be appreciated that different proteins and different poiyflavonoid tannins could be used.
  • the inherently fungicidal, biological mixture that can co-solidify through polymerisation and that contains an amine group component as a radical is a mixture of protein, inherently fungicidal poiyflavonoid tannin which can react with boric acid at the ether oxygen of the pyran ring of the flavonoid as above, and a water borne resin which is chemically effective by having its own amine group for reaction with and complexation of the boric acid, for example a urea-glyoxal resin which is also physically effective by hydrophobation.
  • the application of the dissolved mixture of the borate form of protein, the borate form of tannin and the borate form of resin to timber and the heating or catalysis of the timber can be carried out as before, once again providing for exposure of a complete timber body to the termiticide/fungicide component of the boric acid while timber treated is at
  • SUBSTITUTE SHEET (RULE 261 the same time much hardened as a result of the polymerisation and co-solidification of the protein/tannin/resin mixture with cross linking and networking of the material.
  • the resins in general will also increase the hydrophobicity, or water-repellence, of the timber rendering it increasingly resistant to any loss of boric acid and consequent onset of microbial decay over longer time periods under wet conditions.
  • the invention clearly extends also to the compositions formed in accordance with the method as above described as such and, particularly, to a polyester borate and to a protein borate, to a protein borate/tannin borate mixture and to a protein borate/tannin borate/ resin borate mixture which is particularly suitable for the treatment of timber. Still further, the invention extends to the above compositions in their dissolved form in a suitable solvent with the solution being particularly suitable for the treatment of timber. Cleariy, the above compositions can be provided in a suitable form for the treatment of timber requiring merely the application thereof to timber and subsequently the heating of the timber in order to permit solvent separation and recovery and polymerisation of the main composition within the timber.
  • the invention accordingly extends also to a method of treating timber which includes providing a composition as envisaged above and, if not already dissolved in a suitable solvent, dissolving the composition in a suitable solvent.
  • the dissolved composition can then be applied to timber to be treated in a conventional manner, whereafter the timber can be heated for separating and recovering the solvent therefrom and for permitting solidification of the composition by polymerisation thereof.
  • the invention can apply also to other substances that can polymerise and that include an amine group which permits linking with boric acid in order to form the borate form of the substance, provided that the composition formed can dissolve in a suitable solvent permitting its application to timber as herein envisaged.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Forests & Forestry (AREA)
  • Health & Medical Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Agronomy & Crop Science (AREA)
  • Pest Control & Pesticides (AREA)
  • Plant Pathology (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Zoology (AREA)
  • Environmental Sciences (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)

Abstract

Traitement du bois et particulièrement procédé de fixation du composant actif termiticide/fongicide de l'acide borique à l'intérieur du bois à traiter. Le procédé consiste à faire réagir chimiquement l'acide borique avec une substance contenant un groupe amine comme radical, pouvant se solidifier par polymérisation, pour former la forme borate de la substance. Cette forme borate de la substance peut ensuite être dissoute dans un solvant et appliquée au bois à traiter, l'évaporation du solvant permettant la solidification de la forme borate de la substance par sa polymérisation, ce qui permet au composant actif termiticide/fongicide de l'acide borique de se fixer au bois, pour la protection du bois.
PCT/GB1996/002102 1995-08-29 1996-08-29 Procede de traitement du bois WO1997007946A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU68311/96A AU6831196A (en) 1995-08-29 1996-08-29 A method of treating timber
EP96928590A EP0850127A1 (fr) 1995-08-29 1996-08-29 Procede de traitement du bois

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA957241 1995-08-29
ZA95/7241 1995-08-29

Publications (1)

Publication Number Publication Date
WO1997007946A1 true WO1997007946A1 (fr) 1997-03-06

Family

ID=25585283

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1996/002102 WO1997007946A1 (fr) 1995-08-29 1996-08-29 Procede de traitement du bois

Country Status (3)

Country Link
EP (1) EP0850127A1 (fr)
AU (1) AU6831196A (fr)
WO (1) WO1997007946A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0289317A1 (fr) * 1987-04-28 1988-11-02 Hickson International Plc Agent préservateur du bois
EP0355316A2 (fr) * 1988-08-16 1990-02-28 Rütgerswerke Aktiengesellschaft Procédé pour la préservation du bois et matériaux dérivés
EP0389216A1 (fr) * 1989-03-20 1990-09-26 New Zealand Dairy Research Institute Matériaux poreux
US5151127A (en) * 1990-11-26 1992-09-29 Thompson Duncan C Weather resistant, fire retardant preservative and protective compositions for the treatment of wood and cellulose products
EP0548796A1 (fr) * 1991-12-20 1993-06-30 Hoechst Aktiengesellschaft Agent microbicide contenant un polymère de borate d'ammonium quaternaire pour la conservation et la desinfection des produits et des équipements techniques

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0289317A1 (fr) * 1987-04-28 1988-11-02 Hickson International Plc Agent préservateur du bois
EP0355316A2 (fr) * 1988-08-16 1990-02-28 Rütgerswerke Aktiengesellschaft Procédé pour la préservation du bois et matériaux dérivés
EP0389216A1 (fr) * 1989-03-20 1990-09-26 New Zealand Dairy Research Institute Matériaux poreux
US5151127A (en) * 1990-11-26 1992-09-29 Thompson Duncan C Weather resistant, fire retardant preservative and protective compositions for the treatment of wood and cellulose products
EP0548796A1 (fr) * 1991-12-20 1993-06-30 Hoechst Aktiengesellschaft Agent microbicide contenant un polymère de borate d'ammonium quaternaire pour la conservation et la desinfection des produits et des équipements techniques

Also Published As

Publication number Publication date
AU6831196A (en) 1997-03-19
EP0850127A1 (fr) 1998-07-01

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