CN1003291B - Pressure impregnation of wood poles for preservation - Google Patents

Pressure impregnation of wood poles for preservation Download PDF

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Publication number
CN1003291B
CN1003291B CN85103619.8A CN85103619A CN1003291B CN 1003291 B CN1003291 B CN 1003291B CN 85103619 A CN85103619 A CN 85103619A CN 1003291 B CN1003291 B CN 1003291B
Authority
CN
China
Prior art keywords
solution
polyethylene glycol
timber
chromium
glycol oxide
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.)
Expired
Application number
CN85103619.8A
Other languages
Chinese (zh)
Other versions
CN85103619A (en
Inventor
维廉姆·帕瑞克·查姆伯
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nortel Networks Ltd
Original Assignee
Northern Telecom Ltd
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
Priority to CA000417630A priority Critical patent/CA1187255A/en
Application filed by Northern Telecom Ltd filed Critical Northern Telecom Ltd
Priority to CN85103619.8A priority patent/CN1003291B/en
Publication of CN85103619A publication Critical patent/CN85103619A/en
Publication of CN1003291B publication Critical patent/CN1003291B/en
Expired legal-status Critical Current

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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
    • B27K3/22—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
    • B27K3/02—Processes; Apparatus
    • B27K3/08—Impregnating by pressure, e.g. vacuum impregnation
    • 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
    • B27K3/26—Compounds of iron, aluminium, or chromium
    • 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
    • B27K3/28—Compounds of arsenic or antimony
    • 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
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)

Abstract

The present invention relates to a method for processing wood poles such as telecommunication poles, electric power poles, etc. to reduce surface hardening. The method comprises the steps of adding polyethylene oxygen in a standard processing solution for correction and future adding a surface active agent so as to reduce hexavalent chrome ions in the standard solution for further correction.

Description

The impregnating by pressure of wood preservation
The relevant rod of the present invention anticorrosion is specially adapted to telecommunication and electric power stringing rod.
Telephone pole and other rods use the anticorrisive agent of chromium copper arsenate type to handle usually, but the problem that this class anticorrisive agent has is the outer portion of rod, and promptly sapwood tends to sclerosis.This gives with pressing from both sides the upper boom maintenance personal who fixes on the climbers on the footwear and has brought difficulty.The hard-edge material has limited the thorn people of climbers thorns.And woodenly also can chap.
The relevant improvement to chromium copper arsenate solution of the present invention can be avoided, or can lower the sclerosis of sapwood at least, improves the climbing property of electric pole.
Learn from experience: as mentioned above, the chromium copper arsenate is handled and tended to make processed rod surface, and is harder than corresponding untreated timber.It is reported that the crust rod is in close surface, chromium ion is concentrated than the other parts place at the rod radial section.Seem that chromium is the reason that hardening phenomenon takes place, because ammonia copper arsenate and acid copper arsenate are to the sclerosis of rod, not as good as chromium copper arsenate severity.Anticorrisive agent in set of surfaces reason and the reason of timber sclerosis also do not have and can fully understand.
As if at least anticorrisive agent salt have two possible reasons in the high concentration of wood surface, and a reason is that sapwood is than heartwood porous.Because the porous of sapwood, thus more can keep solution than heartwood, and the reaction of the active part in chromium and the timber caulome.The Another reason of considering is that the concentrated of solution height is because the chromium oxide of sexavalence is active especially to other materials in sugar and the sapwood, thereby is combined into semisolid material, has stopped that anticorrisive agent further permeates to wood matrix.
Case-hardened actual mechanism of rod even the mechanism of concentrating than chromium ion are more unclear.Have a kind of theory to think: chromium oxide is transformed into water soluble compound to a part of lignin and sugar, then this compound is proposed from wooden, and is just the same with the wind erosion phenomenon.So the cellulose of retaining/lignin compound shrinks, and causes a kind of case-hardened mechanism.Another kind of theory is thought: chromium oxide reacts, and makes the lignin phase-polymerization of cellulose/lignin compound, and a kind of cellulose/chromium lignin compound of formation is harder than original compound.These two kinds of theories all can not obtain proof, but find that these two kinds of reactions can both exist.
Problem is being considered, and found out chromium ion after the characteristics that the rod near surface is concentrated, again after drawing above-mentioned reason and theory, still still unclear for how problem being alleviated.People advise improving antiseptic solution, and a kind of prescription is provided, and can keep the corrosion-resistant effect, and can reduce sclerosis.There is a kind of processing method to be to use the polymer of ethylene oxide, just generally is called polyethylene glycol (PEG).Desirable molecular weight ranges is between 500 to 2000, and molecular weight is low to reach 100 though also used, very ineffective.Volumetric concentration can change between 0.5% to 10%.
Used reference solution is a kind of standard chlorine copper arsenate, as ASTM standard D1625-71 defined.Concrete solution is called as CCA(chromium copper arsenate), desirable example is its C type liquid.The composition of this solution is as follows: Cr VI calculates and contains CrO 344.5-50.5%; Cupric calculates and contains CuO17.0-21.0%; Pentavalent arsenic calculates and contains As 2O 530.0-38.0%.The composition of demarcating is thought of as 47.5%CrO 3, 18.5%CuO and 34%As 2O 5This standard is that the people knows and through widely used.
Reference solution (Basic Solution) thin up becomes the standard water solution of 2%-2.5%, and each part solution adds water 40-50 part.This also is a standard liquid common in the treating of wood.In a specific embodiment, in standard water solution, add concentration and be 10%, molecular weight is 1000 polyethylene glycol (PEG1000).
Someone proposed to add aliphatic acid in standard water solution.But this class additive can not be satisfactory.It is found that chromium etch aliphatic acid in this solution, make this additive precipitation.When solution was spread on timber, additive was retained from the teeth outwards or near surface, is floated by rainwater at last.
The suggestion that has is thought: add polyethylene glycol (PEG) and also can produce identical result, chromium also may precipitate.With the present invention during to the wood preservation expert introduction, whether they suspect might make wood preservation solution according to the present invention, and they can not make a kind of stable solution.
But it is possible making a kind of stable solution, PEG low and is continuously added in the standard water solution of CCA, to obtain uniform distribution.Should be maintained at about solution under 25 ℃, desirable scope is 21～29 ℃.Solution is remained on below 29 ℃, be preferably in about 25 ℃, it is minimum that the reaction of chromium and PEG just reaches.Preferably the pH value is remained on below 2.0, optimal scope is 1.7 to 2.0.Keep the low temperature of solution that the pH value is remained in the ideal range.
Polymer plays " humidizer " to wood matrix, and makes the buffer of chromium oxide, delays the aggressivity chemical reaction of chromium oxide to timber, sugar, lignin etc.The humidification of PEG1000 is that PEG fills in the micropore of timber, then water is attracted, and water and its matrix are engaged.It is believed that this appearance that can make timber is softening, provide lubrication, reduced the be full of cracks or the explosion of rod at least to the pole climber thorn.
Another example is to add a kind of surfactant, helps to reduce anticorrisive agent and concentrate in sapwood to the heartwood infiltration.It is when watering clear water that a subsidiary effect is arranged, and might remove too much chromium.
Another example is to reduce the hexavalent chromium that exists, and for example reduces to 2/3 of regular solution content.This also can improve permeability.
Explain as top, cause the case-hardened actual mechanism of rod also to fail fully to understand.But, by considering variety of issue and its influence, might provide a kind of method of novelty, how can obtain the effect that hope obtains even can't fully understand this method, but it is still effectively.
Rod is pressed usual way with solution and is handled, and exactly: rod is put into a case, and deflate makes it vacuum at first as far as possible, pressurizes with Treatment Solution then.

Claims (4)

1, the wood preservation method of coming impregnated timber with the standard water solution of chromium, copper and the arsenic salt of 2-2.5% concentration, its improvement has been to add the polyethylene glycol oxide of molecular weight ranges between 100-2000, the concentration of polyethylene glycol oxide is 0.5-10%, wherein polyethylene glycol oxide is slowly added temperature maintenance between 21-29 ℃, in the standard water solution of pH between 1.7-2.0.
2, method as claimed in claim 1, the molecular weight ranges that it is characterized in that polyethylene glycol oxide is between 500-2000.
3, method as claimed in claim 1, the molecular weight that it is characterized in that polyethylene glycol oxide is 1000.
4, method as claimed in claim 1, wherein be with timber pickling in container, timber put into container after, by predetermined a period of time the air in the container is found time earlier, use then through improved solution, by predetermined pressure and time, this timber of pressurized treatments in described container.
CN85103619.8A 1982-12-14 1985-04-26 Pressure impregnation of wood poles for preservation Expired CN1003291B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CA000417630A CA1187255A (en) 1982-12-14 1982-12-14 Pressure impregnation of wood poles for preservation
CN85103619.8A CN1003291B (en) 1982-12-14 1985-04-26 Pressure impregnation of wood poles for preservation

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA000417630A CA1187255A (en) 1982-12-14 1982-12-14 Pressure impregnation of wood poles for preservation
CN85103619.8A CN1003291B (en) 1982-12-14 1985-04-26 Pressure impregnation of wood poles for preservation

Publications (2)

Publication Number Publication Date
CN85103619A CN85103619A (en) 1986-10-22
CN1003291B true CN1003291B (en) 1989-02-15

Family

ID=25669887

Family Applications (1)

Application Number Title Priority Date Filing Date
CN85103619.8A Expired CN1003291B (en) 1982-12-14 1985-04-26 Pressure impregnation of wood poles for preservation

Country Status (2)

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CN (1) CN1003291B (en)
CA (1) CA1187255A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4567115A (en) * 1982-12-16 1986-01-28 Bell Canada Pressure impregnation of wood poles for preservation
CA1257451A (en) * 1985-11-25 1989-07-18 William P. Trumble Stabilization of wood preservative solutions and preservation of wood by such solutions
US5731096A (en) * 1995-08-04 1998-03-24 Hydro-Quebec Permanent decrease of wood hardness by in situ polymerization of pre-polymers

Also Published As

Publication number Publication date
CA1187255A (en) 1985-05-21
CN85103619A (en) 1986-10-22

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