CH238190A - Wood preservatives. - Google Patents
Wood preservatives.Info
- Publication number
- CH238190A CH238190A CH238190DA CH238190A CH 238190 A CH238190 A CH 238190A CH 238190D A CH238190D A CH 238190DA CH 238190 A CH238190 A CH 238190A
- Authority
- CH
- Switzerland
- Prior art keywords
- wood
- sublimate
- wood preservatives
- shrinkage cracks
- wood preservative
- Prior art date
Links
Classifications
-
- 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
- A01N59/10—Fluorides
-
- 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
- A01N59/16—Heavy metals; Compounds thereof
- A01N59/18—Mercury
-
- 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
- A01N59/16—Heavy metals; Compounds thereof
- A01N59/22—Arsenic
-
- 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
- B27K3/52—Impregnating agents containing mixtures of inorganic and organic compounds
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Agronomy & Crop Science (AREA)
- Inorganic Chemistry (AREA)
- Pest Control & Pesticides (AREA)
- Plant Pathology (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Dentistry (AREA)
- General Health & Medical Sciences (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Environmental Sciences (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Description
Holzkonservierungsmittel. Bekanntlich wird bei der Imprägnierung von Holz mit Hilfe von Sublimat diese Ver bindung so dauerhaft im Holz fixiert, dass bei der Bewitterung des Holzes kaum nennenswerte Auslaugung stattfindet. Dieser hohen Haftfestigkeit des Sublimats an der Holzfaser steht nur eine verhältnismässig geringe Eindringtiefe des Schutzmittels in das Holz gegenüber.
Wird ein mit Sublimat behandeltes Holz im Verlauf des Gebrauchs durch Schwundrisse aufgespalten oder äussere meist nur 0,5-1 cm dicke mit Sublimat ge tränkte Zone verletzt, so können an diesen Stellen holzzerstörende Pilze eindringen und trotz des stark wirkenden Schutzes des Su- blimats in den äussern Holzzonen eine Fäul nis der innern Zonen herbeiführen, so dass das Holz vollständig unbrauchbar wird.
Man hat ans diesem Grunde bereits Ver fahren in Vorschlag gebracht, durch die ein tieferes Eindringen des Sublimats ermöglicht werden sollte, wie beispielsweise eine Vor- behandlung des Holzes mit Wasserdampf oder durch Dämpfen mit harzlösenden Lösungsmitteln und nachfolgender scharfer Trocknung, wobei eine weitgehende Bildung von Schwundrissen und durch diese eine bessere Aufnahme der Sublimatlösung an gestrebt wurde. Die Wirksamkeit dieser Verfahren ist in starkem Masse davon ab hängig, wie weit es gelingt, das Holz mit Schwundrissen zu durchsetzen.
Eine Gleich mässigkeit der Verteilung des Imprägnier salzes ist aber auf keinen Fall dabei gewähr leistet, da das Eindringungsvermögen des Sublimats von dem Schwundrissen aus in tangentialer Richtung gering und mithin auch auf diesem Wege eine vollständige und gleichmässige Durchdringung tieferer Holz schichten nicht zu erreichen ist.
Gegenstand dieser Erfindung ist ein Su- blimas enthaltendes Holzschutzmittel, mit dessen Hilfe es gelingt, ohne ein Vorbehand- lung der oben erwähnten Art eine Konser-
EMI0002.0001
EMI0002.0002
Wood preservatives. As is well known, when impregnating wood with the help of sublimate, this connection is so permanently fixed in the wood that there is hardly any significant leaching during the weathering of the wood. This high adhesive strength of the sublimate on the wood fiber is offset by only a relatively low penetration depth of the protective agent into the wood.
If a wood treated with sublimate is split open due to shrinkage cracks in the course of use or if the outer zone, which is usually only 0.5-1 cm thick with sublimate, is damaged, wood-destroying fungi can penetrate these areas and despite the strong protection of the sublimate cause the outer wood zones to rot in the inner zones, so that the wood is completely unusable.
For this reason, a method has already been proposed that should allow deeper penetration of the sublimate, such as pretreatment of the wood with water vapor or by steaming with resin-dissolving solvents and subsequent sharp drying, with extensive formation of shrinkage cracks and through this a better absorption of the sublimate solution was sought. The effectiveness of this process is to a large extent dependent on how far it is possible to penetrate the wood with shrinkage cracks.
A uniform distribution of the impregnation salt is in no way guaranteed, since the penetration capacity of the sublimate from the shrinkage cracks in the tangential direction is low and therefore complete and even penetration of deeper layers of wood cannot be achieved in this way either.
The subject of this invention is a wood preservative containing su- blimas, with the help of which it is possible to obtain a preservative without a pretreatment of the type mentioned above.
EMI0002.0001
EMI0002.0002
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE238190X | 1943-02-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH238190A true CH238190A (en) | 1945-06-30 |
Family
ID=5903456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH238190D CH238190A (en) | 1943-02-12 | 1944-02-10 | Wood preservatives. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH238190A (en) |
-
1944
- 1944-02-10 CH CH238190D patent/CH238190A/en unknown
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