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
  • A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
  • A01N25/22—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests containing ingredients stabilising the active ingredients
• • 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
• • 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
  • A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
• • 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
  • A01N55/00—Biocides, pest repellants or attractants, or plant growth regulators, containing organic compounds containing elements other than carbon, hydrogen, halogen, oxygen, nitrogen and sulfur
  • A01N55/02—Biocides, pest repellants or attractants, or plant growth regulators, containing organic compounds containing elements other than carbon, hydrogen, halogen, oxygen, nitrogen and sulfur containing metal atoms
• • 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
  • A01N59/20—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
  • B27K3/16—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
  • B27K2240/00—Purpose of the treatment
  • B27K2240/20—Removing fungi, molds or insects
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/4935—Impregnated naturally solid product [e.g., leather, stone, etc.]
  • Y10T428/662—Wood timber product [e.g., piling, post, veneer, etc.]

Definitions

• the present invention relates to wood preservative formulations and methods of treating wood and other cellulosic material.
• formulations which contain a positively charged polymer which enhances the penetration of the active ingredients also present in the formulation into the wood or other cellulosic material.
• an amount of preservative solution is consumed by way of being absorbed into the timber. This typically represents a relatively small amount of the total volume of solution used to flood the autoclave. This generates a scenario whereby treatment solution is repeatedly exposed to timber.
• the average treatment solution age increases as a function of solution refresh rates. This can extend from several days to many months. Therefore the solution is repeatedly exposed to timber.
• R 3 and R 4 denote hydrogen
• the biocidal metal ion may be a biocidal zinc ion.
• the biocidal zinc may advantageously be incorporated into the formulation in the form of inorganic zinc salts, such as carbonate, bicarbonate, chloride, hydroxide, borate, oxide or phosphate.
• the zinc may be in the form of a an organozinc compound such as a simple organic salt, such as formate or acetate, or as a complex such as N-nitroso-N-cyclohexyl-hydroxylamine- zinc (zinc-HDO), zinc naphthenate or zinc pyrithione (bis(2-pyridylthio)zinc 1,1'- dioxide - CAS number 13463-41-7).
• the present invention provides a combined wood preservative product comprising,
• plasterboard and cellulosic material such as cotton.
• leather, textile materials and even synthetic fibres, hessian, rope and cordage as well as composite wood materials.
• the invention is described with reference to the treatment of wood but it will be appreciated that other cellulosic materials may be treated analogously.
• the reference to treatment of "wood” or “timber” applies mutatis mutandis to such substrates, unless it is clear from the context.
• the formulations are applied to sawn timber, logs or laminated veneer lumber, OSB or MDF. Most preferably, the formulations are applied to unseasoned timber.
• Substrates made of wood or cellulosic material which have been treated with a formulation or product or by a method according to the invention as described herein, comprise further aspects of the present invention. Additionally, substrates made of wood or other cellulosic material containing a biocidai agent and a cationic polymer (e.g. a formulation) according to the invention comprise a further aspect of the present invention.
• a further aspect of the present invention is the use of formulations and products of the present invention in the treatment or preservation of wood or other cellulosic material.
• Preservation refers to the protection of wood or other material against fungal decay, borers and termites.
• the present invention provides the use of a cationic polymer as defined herein to ameliorate the impact on penetration into wood (or other cellulosic material) of biocidai agents which is caused by anionic by-products and timber extractives, as part of a method of preserving wood or other cellulosic material. Preferred methods of application and biocides are described above. The invention will now be further described with reference to the following non-limiting Examples and Figures in which:
• PolyDADMAC (Diallyldimethylammoniumchloride), CAS 26062-79-3
• the 3%w/v aqueous solutions of the copper amine complex containing active substance were aged, to replicate commercial treatment plant solutions, by the addition of Pinus Sylvestris sapwood sawdust, 3.5%w/v, and stirred for 1 hour.
• the sawdust was filtered from of the aqueous the copper amine solution prior to treatment of matched blocks being undertaken.
• Sections of kiln dried Pinus Sylvestris (12cmx12cmx2.75cm) were then impregnated with a 3%w/v solution of the copper amine complex, using a double vacuum process.
• the depth of penetration was observed by cross cutting the samples and spraying with a reagent that reacts with copper to generate a dark coloration (dark blue to black).
• the sodium acetate solution was sprayed onto a fresh cross cut face of timber and then the Rubianic acid solution was sprayed onto the fresh cross cut face of timber.
• the copper penetrated timber turns a dark blue to black colour instantly.
• Example 3 An aqueous solution of zinc ions was prepared by reacting zinc chloride with sodium gluconate and mono ethanolamine to give a zinc concentration of 0.50%w/v and a Gluconate.Zn molar ratio of 2:1 , and an MEA:Zn molar ratio of 2:1.

Landscapes

• Life Sciences & Earth Sciences (AREA)
• Wood Science & Technology (AREA)
• Engineering & Computer Science (AREA)
• Health & Medical Sciences (AREA)
• General Health & Medical Sciences (AREA)
• Dentistry (AREA)
• Plant Pathology (AREA)
• Pest Control & Pesticides (AREA)
• Agronomy & Crop Science (AREA)
• Zoology (AREA)
• Environmental Sciences (AREA)
• Inorganic Chemistry (AREA)
• Chemical & Material Sciences (AREA)
• Forests & Forestry (AREA)
• Toxicology (AREA)
• Chemical And Physical Treatments For Wood And The Like (AREA)
• Agricultural Chemicals And Associated Chemicals (AREA)

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Citations (5)

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• 2011
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