WO2008140323A1 - Bois modifié et procédé de fabrication d'un bois modifié - Google Patents

Bois modifié et procédé de fabrication d'un bois modifié Download PDF

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Publication number
WO2008140323A1
WO2008140323A1 PCT/NO2008/000164 NO2008000164W WO2008140323A1 WO 2008140323 A1 WO2008140323 A1 WO 2008140323A1 NO 2008000164 W NO2008000164 W NO 2008000164W WO 2008140323 A1 WO2008140323 A1 WO 2008140323A1
Authority
WO
WIPO (PCT)
Prior art keywords
wood
bar
vacuum
minutes
specimen
Prior art date
Application number
PCT/NO2008/000164
Other languages
English (en)
Inventor
Mats Westin
Stig Lande
Original Assignee
Kebony Asa
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 Kebony Asa filed Critical Kebony Asa
Priority to JP2010508324A priority Critical patent/JP2010526692A/ja
Priority to CA002686948A priority patent/CA2686948A1/fr
Priority to AP2009005063A priority patent/AP2009005063A0/en
Priority to EP08753825A priority patent/EP2152482A1/fr
Priority to AU2008251134A priority patent/AU2008251134A1/en
Publication of WO2008140323A1 publication Critical patent/WO2008140323A1/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
    • B27K3/15—Impregnating involving polymerisation including use of polymer-containing impregnating agents
    • B27K3/156—Combined with grafting onto wood fibres
    • 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
    • B27K3/08—Impregnating by pressure, e.g. vacuum impregnation

Definitions

  • WPG Weight Percent Gain
  • Figure 1 Duration of vacuum step versus chemical uptake
  • Figures 2 and 3 Two blocks cut in half (top and right end-sealed and bottom EN252 stake).
  • Figure 4 Two pine blocks cut in half. On top the one with 75% HW, bottom 60% HW.
  • Furan polymer modified wood is produced by first impregnating the wood with a suitable amount of a polymerizable liquid of low molecular furan derivatives, e.g. furfural, furfuryl alcohol, bishydroxymethylfuran or combinations thereof, and optionally catalysts, initiators, low boiling point alcohols such as ethanol or other compounds depending upon the nature of the impregnating solution. After impregnation the wood is heated, whereby the polymerizable compounds are polymerized into a furan polymer in the wood cells.
  • a polymerizable liquid of low molecular furan derivatives e.g. furfural, furfuryl alcohol, bishydroxymethylfuran or combinations thereof
  • catalysts, initiators, low boiling point alcohols such as ethanol or other compounds depending upon the nature of the impregnating solution.
  • the polymerizable component is utilized without dilution by a diluent such as water or other solvent.
  • the impregnation is done by first applying the impregnation liquid to the wood under a pressure of at least 5 bar for a time period of at least 30 minutes.
  • the pressure is at least 10 bar and the impregnation time under this pressure is between 30 and 60 minutes.
  • This overpressure step is followed by a prolonged vacuum step, where the impregnation vessel is evacuated and the pressure maintained at low levels (0.1 bar) for at least 4 hours.
  • the vacuum is maintained from 5 to 6 hours.
  • the wood is subjected to an initial air pressure of 2 to 6 bar for a time span of 10 to 30 minutes before the liquid impregnation is started, thus filling up more of the wood cell volume with air prior to impregnation.
  • the impregnation solution further comprises a low boiling point alcohol such as ethanol in an amount from 5 to 10%.
  • the impregnated wood is heated to a temperature in the range of 80 to 15O 0 C, whereby the polymerizable components are polymerized to a furan polymer in the wood cells. Since water is not used as a diluent, no further drying of the wood is required.
  • products obtainable by the described process can have a range of furan polymer retentions, with dry density increases, expressed as "Weight Percent Gain” (WPG), of the parent wood material ranging from 30 to 100 %.
  • WPG Weight Percent Gain
  • the products can exhibit WPG of from 30 to 80%, and according to yet another aspect a WPG of 70% or less.
  • FA refers to furfuryl alcohol .
  • the "FAlOO” mix is based on undiluted furfuryl alcohol with addition of catalysts.
  • the "FA40” mix is a waterborne furfuryl alcohol solution containing approximately 28% furfuryl alcohol with the addition of catalysts and stabilizing chemicals.
  • the "FA 50” mix is a waterborne furfuryl alcohol solution containing approximately 32 % furfuryl alcohol with the addition of catalysts and stabilizing chemicals.
  • the FAlOO -mix is based on a commercial recipe developed by Wood Polymer Technologies ASA (WPT, now Kebony ASA). A modification to the FAlOO mix was done after the first set of tests by adding 10% ethanol (m/m based on final mix).
  • Example 1 Control - Standard Lo wry process using FAlOO treatment mix. 12 bar pressure for 90 min followed by 60 min post-vacuum.
  • Example 2 FAlOO treatment mix. 12 bar pressure for 45 min followed by 6h post- vacuum (divided in 2h periods with intermediate weighting of the specimens).
  • Example 3 FAlOO treatment mix modified by addition of ethanol. 12 bar pressure for 60 min followed by 6h post-vacuum (divided in 2h periods with intermediate weighting of the specimens).
  • the resulting WPG was now 70% (315 kg/m 3 ) for the end-sealed pine sapwood blocks and approx. 50-60% (260-300 kg/m 3 ) for non-sealed EN252 stakes. This is almost the same WPG level as was reached with the waterborne FA50 mix used at Wood Polymer Technologies for preparation of the highest WPG-level for the EN252 test started June 2005.
  • Example 3 60 min pressure + 360 min vacuum In these trials 10% ethanol was added to the FAlOO-mix and the pressure time was increased slightly - 60 min instead of 45 min still shorter than the Standard 90 min.
  • the resulting WPG was slightly lower for the end-sealed pure sapwood but higher for the other groups. Especially for the beech and the high HW/SW ratio in pine there was a dramatic increase in uptake (better penetration in beech and into the heartwood zone of pine).

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)

Abstract

L'invention concerne un procédé de modification d'un spécimen de bois, dans lequel le spécimen de bois est immergé dans une solution d'imprégnation comprenant des dérivés de furanne de masse moléculaire faible, polymérisable, dans un récipient, le récipient est pressurisé jusqu'à entre 5 et 29 bars pendant entre 30 et 120 minutes, le spécimen de bois est soumis à un vide dans la plage de 0,01 à 0,5 bar pendant entre 60 et 600 minutes, et la solution d'imprégnation est polymérisée.
PCT/NO2008/000164 2007-05-11 2008-05-09 Bois modifié et procédé de fabrication d'un bois modifié WO2008140323A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2010508324A JP2010526692A (ja) 2007-05-11 2008-05-09 改質木材、および改質木材を製造する方法
CA002686948A CA2686948A1 (fr) 2007-05-11 2008-05-09 Bois modifie et procede de fabrication d'un bois modifie
AP2009005063A AP2009005063A0 (en) 2007-05-11 2008-05-09 Modified wood and method for producing modified wood
EP08753825A EP2152482A1 (fr) 2007-05-11 2008-05-09 Bois modifié et procédé de fabrication d'un bois modifié
AU2008251134A AU2008251134A1 (en) 2007-05-11 2008-05-09 Modified wood and method for producing modified wood

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US91732507P 2007-05-11 2007-05-11
US60/917,325 2007-05-11

Publications (1)

Publication Number Publication Date
WO2008140323A1 true WO2008140323A1 (fr) 2008-11-20

Family

ID=39645635

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO2008/000164 WO2008140323A1 (fr) 2007-05-11 2008-05-09 Bois modifié et procédé de fabrication d'un bois modifié

Country Status (7)

Country Link
EP (1) EP2152482A1 (fr)
JP (1) JP2010526692A (fr)
AP (1) AP2009005063A0 (fr)
AU (1) AU2008251134A1 (fr)
CA (1) CA2686948A1 (fr)
RU (1) RU2009145034A (fr)
WO (1) WO2008140323A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013180565A1 (fr) * 2012-05-31 2013-12-05 Stichting Dienst Landbouwkundig Onderzoek Composition de conservateur de lignocellulose, procédé utilisant une telle composition, matière lignocellulosique préservée pouvant être obtenue par un tel procédé et produit comprenant une telle matière
CN113696291A (zh) * 2021-09-10 2021-11-26 南京林业大学 轻度糠醇改性协同密实化处理提升木材性能的方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3129199B1 (fr) * 2014-04-11 2019-08-07 Branko Hermescec Produits dérivés du bois et non dérivés du bois chimiquement modifiés et leurs procédés de production
CA3187354A1 (fr) * 2020-07-29 2022-02-03 Furanwood Co., Ltd. Procede de fabrication de materiau ligneux modifie, solution resinifiee de derive de furanne, et materiau ligneux modifie

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2909450A (en) * 1956-06-27 1959-10-20 Koppers Co Inc Impregnating solutions and method of impregnation therewith
WO2002030638A2 (fr) * 2000-10-12 2002-04-18 Wood Polymer Technologies Asa Bois impregne de polymere furannique, procede de preparation du polymere et utilisations associees
WO2002060660A1 (fr) * 2001-02-01 2002-08-08 Wood Polymer Technologies Asa Bois impregne de polymere furanne
WO2004011216A2 (fr) * 2002-07-26 2004-02-05 Wood Polymer Technologies Asa Bois imprégné de polymère furannique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2909450A (en) * 1956-06-27 1959-10-20 Koppers Co Inc Impregnating solutions and method of impregnation therewith
WO2002030638A2 (fr) * 2000-10-12 2002-04-18 Wood Polymer Technologies Asa Bois impregne de polymere furannique, procede de preparation du polymere et utilisations associees
WO2002060660A1 (fr) * 2001-02-01 2002-08-08 Wood Polymer Technologies Asa Bois impregne de polymere furanne
WO2004011216A2 (fr) * 2002-07-26 2004-02-05 Wood Polymer Technologies Asa Bois imprégné de polymère furannique

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013180565A1 (fr) * 2012-05-31 2013-12-05 Stichting Dienst Landbouwkundig Onderzoek Composition de conservateur de lignocellulose, procédé utilisant une telle composition, matière lignocellulosique préservée pouvant être obtenue par un tel procédé et produit comprenant une telle matière
CN113696291A (zh) * 2021-09-10 2021-11-26 南京林业大学 轻度糠醇改性协同密实化处理提升木材性能的方法

Also Published As

Publication number Publication date
CA2686948A1 (fr) 2008-11-20
EP2152482A1 (fr) 2010-02-17
RU2009145034A (ru) 2011-06-20
AU2008251134A1 (en) 2008-11-20
JP2010526692A (ja) 2010-08-05
AP2009005063A0 (en) 2009-12-31

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