WO1996000763A1 - Agent ignifuge - Google Patents

Agent ignifuge Download PDF

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Publication number
WO1996000763A1
WO1996000763A1 PCT/NO1995/000113 NO9500113W WO9600763A1 WO 1996000763 A1 WO1996000763 A1 WO 1996000763A1 NO 9500113 W NO9500113 W NO 9500113W WO 9600763 A1 WO9600763 A1 WO 9600763A1
Authority
WO
WIPO (PCT)
Prior art keywords
weight
water
impregnation
composition
water soluble
Prior art date
Application number
PCT/NO1995/000113
Other languages
English (en)
Inventor
Arve VALSØ
Egil Kleven
Kalman Nagy
Original Assignee
Fireguard Scandinavia A/S
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 Fireguard Scandinavia A/S filed Critical Fireguard Scandinavia A/S
Priority to AU28997/95A priority Critical patent/AU2899795A/en
Priority to DE19581683T priority patent/DE19581683T1/de
Priority to NO953316A priority patent/NO180524C/no
Publication of WO1996000763A1 publication Critical patent/WO1996000763A1/fr
Priority to FI965112A priority patent/FI965112A/fi
Priority to DK146496A priority patent/DK146496A/da
Priority to SE9604745A priority patent/SE510143C2/sv

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/34—Ignifugeants
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K21/00—Fireproofing materials
    • C09K21/02—Inorganic materials
    • C09K21/04—Inorganic materials containing phosphorus
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/07—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with halogens; with halogen acids or salts thereof; with oxides or oxyacids of halogens or salts thereof
    • D06M11/11—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with halogens; with halogen acids or salts thereof; with oxides or oxyacids of halogens or salts thereof with halogen acids or salts thereof
    • D06M11/13—Ammonium halides or halides of elements of Groups 1 or 11 of the Periodic Table
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/07—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with halogens; with halogen acids or salts thereof; with oxides or oxyacids of halogens or salts thereof
    • D06M11/11—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with halogens; with halogen acids or salts thereof; with oxides or oxyacids of halogens or salts thereof with halogen acids or salts thereof
    • D06M11/155—Halides of elements of Groups 2 or 12 of the Periodic Table
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/07—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with halogens; with halogen acids or salts thereof; with oxides or oxyacids of halogens or salts thereof
    • D06M11/11—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with halogens; with halogen acids or salts thereof; with oxides or oxyacids of halogens or salts thereof with halogen acids or salts thereof
    • D06M11/28—Halides of elements of Groups 8, 9, 10 or 18 of the Periodic Table
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/51—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with sulfur, selenium, tellurium, polonium or compounds thereof
    • D06M11/55—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with sulfur, selenium, tellurium, polonium or compounds thereof with sulfur trioxide; with sulfuric acid or thiosulfuric acid or their salts
    • D06M11/56—Sulfates or thiosulfates other than of elements of Groups 3 or 13 of the Periodic Table
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/68—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with phosphorus or compounds thereof, e.g. with chlorophosphonic acid or salts thereof
    • D06M11/70—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with phosphorus or compounds thereof, e.g. with chlorophosphonic acid or salts thereof with oxides of phosphorus; with hypophosphorous, phosphorous or phosphoric acids or their salts
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/68—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with phosphorus or compounds thereof, e.g. with chlorophosphonic acid or salts thereof
    • D06M11/70—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with phosphorus or compounds thereof, e.g. with chlorophosphonic acid or salts thereof with oxides of phosphorus; with hypophosphorous, phosphorous or phosphoric acids or their salts
    • D06M11/71—Salts of phosphoric acids
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
    • D06M13/10—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen
    • D06M13/184—Carboxylic acids; Anhydrides, halides or salts thereof
    • D06M13/188—Monocarboxylic acids; Anhydrides, halides or salts 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
    • B27K2240/00—Purpose of the treatment
    • B27K2240/30—Fireproofing
    • 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
    • B27K3/166—Compounds of phosphorus
    • 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
    • B27K3/18—Compounds of alkaline earth metals
    • 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
    • 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
    • B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
    • B27K5/04—Combined bleaching or impregnating and drying of wood

Definitions

  • the present invention concerns a fire retarding agent and a method for protecting impregnable and normally combustible material, such as wood and textiles.
  • NO Patent 167400 describes a fire and smoke retarding agent comprising mono ammoniumphosphate and/or diammoniumphosphate and/or ammoniumsulphate, NaHCO 3 , EDTA, phosphoric acid (85%), and optionally common additives. This agent is used to impregnate wood, among other things.
  • a drawback of this agent is the occurence of sweating of the impregnated agent from the substrate material due to the influence of humidity. This is particularly relevant with timber, which requires a high content of fire protecting agent, which again requires impregnation by means of relatively large volumes of a liquid carrier (water).
  • the absorbed fire protecting compounds will by the external influence of humidity migrate in the substrate material to even out the concentration gradient. The substrate material can then after a certain period of time lose at least part of its fire protection.
  • GB Patent 1.171.475 (Blunt) describes a method for providing fire protecting impregnation of timber.
  • the timber is impregnated in a first step by a buffered (pH 5-6) solution of diammonumphosphate, and in a second step by a solution of magnesium sulphate, thus forming an insoluble magnesium- ammoniumphosphate.
  • a buffered (pH 5-6) solution of diammonumphosphate and in a second step by a solution of magnesium sulphate, thus forming an insoluble magnesium- ammoniumphosphate.
  • this method is said to cause problems with for example corrosion defects on metal components located adjacent to impregnated timber or wood caused by remaining acidic impregnating solution, including leaching of impregnating material.
  • a first drawback with Blunt 1 s method is that the process steps including a first impregnation, draining, second impregnation and subsequent drying will hardly secure a sufficient depth of impregnation of large sized material. Material impregnated in accordance with this method will therefore in many cases not fulfil Norwegian requirements for fire technical classification.
  • a second and at least equally important disadvantage is that the impregnation must be performed in two steps to avoid precipitation of the metal phosphates prior to penetration into the material.
  • the main object of the present invention is to provide an agent and a method for the impregnation of water absorbable and normally combustible material, which despite a one-step impregnation achieves a proper retention of fire and smoke retarding agent even at influence of external humidity, and fulfil the highest fire technical classification requirements according to the Norwegian Standard.
  • Another object of the invention is to provide such an agent which avoids the problems with discoloring of impregnated timber or wood.
  • the materials are impregnated in a manner known per se which secures, a sufficient absorption of the agent in accordance with the invention, such as dipping or pressure- vacuum impregnation.
  • the impregnated material fulfils the highest requirements with regard to the Norwegian Standard of fire technical classification, and is neutral with respect to colour change of the impregnated material.
  • the present fire and smoke retarding composition also enables one-step impregnation, which particularly in the production of fire retardant timber or wood results in substantial savings in cost and time.
  • the agent of the present invention can be prepared by blending two separate components a) and b): component a) comprising water, mono- and/or diammoniumphosphate, optionally phosphoric acid and an ammonium compound having the ability to dissociate in water, such as ammoniumacetate, ammoniumsulphite, ammoniumsulphate, ammoniumchloride and ammoniumnitrate, preferably ammoniumacetate, wherein the content of and the ratio between water and the ammonium salts and optionally phosphoric acid, is selected to obtain a pH of 3-6, component b) water, acetic acid and at least one water soluble metal salt having the ability to form water insoluble salts with phosphate ions and/or ammoniumphosphate ions, such as magnesiumsulphate and/or magnesiumacetate, the content of and the ratio between water and acetic acid is selected to obtain a pH in the range 1.5-3.2, and component a) and b) are blended preferably at ambient temperature and pH-
  • Topical metal salts for use in the present invention are salts that form insoluble phosphates or ammoniumphosphates in the impregnated material.
  • such metals are the earth alkaline metals Ba, Ca and Mg, and metals from group IV of the periodic system, such as Fe, Cu and Zn.
  • suitable metal salts for use with the present invention are chlorides of Cu, Zn, Ba, Ca, Mg and Fe, sulphates or Cu, Zn, Fe, Mg, and acetate of Ca, Cu, Zn and Mg.
  • Magnesiumsulphate is preferred for several reasons: low price, low toxicity, good solubility in the parent solution prior to impregnation, and low solubility after impregnation and drying, e.g. in the form of magnesiumammonium-phosphate.
  • persons skilled in the art would be able to reveal other metal salts suitable for use with the present invention with support from the present description and their ordinary knowledge.
  • Suitable ammonium compounds for use in component a) above can be any compound which dissociates in the water based solution and forms ammonium ions.
  • Preferred ammonium compounds are ammoniumacetate and/or ammoniumsulphate, which by a change of pH during the drying step are included in the formation of insoluble metal ammonium phosphates.
  • the impregnated solution may have a varying content of salts, according to the material absorbed and the extent of desired fire retardant effect.
  • Timber requires for example a relatively high content of salts, e.g. at least 20 weight% (in the timber), whereas other materials often require less salts.
  • Dependent on the content of for example Mg salts at least a portion of the magnesiumsulphate can be substituted by magnesiumacetate to decrease the sulphate concentration in the solution.
  • the impregnation solution can be incorporated into the substrate material in a manner known per se. With regard to timber, for example conventional pressure impregnation processes are suitable.
  • impregnated material In the preparation of material which is hard to impregnate or material having a relatively large thickness, such as timber, it is preferred to dry the impregnated material in an atmosphere with a gradually decreasing humidity content. If e.g. impregnated timber is dried in an atmosphere with a low humidity content, an increased drying temperature must be used, or a disproportionately long time will have to be used to remove the substantial part of the acetic acid remaining in the timber, if at all possible. However, high drying temperatures weaken the timber strength substantially, for example about 50% at a drying temperature of 120° C.
  • the timber In order to avoid weakening of the timber strength and effect removal of the acetic acid component, it is preferred to dry the timber for 1-3 weeks at about 60 °C and in an atmosphere having a gradually decreasing humidity content, for example from 100% RH at the beginning and down to 20% RH at the end of the drying step. Moreover, it is preferred to dry the timber with exhange of air in order to keep the partial pressure of acetic acid at an acceptable low level in view of the concentration gradient during the stripping of the same from the timber. Time, temperature, and humidity conditions may vary from one type of material to another, and may vary with the dimension of the material.
  • the timber impregnated in this way fulfil, thanks to the high solid content after drying, the highest classification for organic material according to the Norwegian Standard 3919, and do not involve drawbacks with regard to discoloring of the timber or corrosion of metal components located inside or adjacent to the impregnated timber.
  • a preferred composition according to the present invention for timber, without additives comprises:
  • This composition has the benefit that the impregnated wood exhibits good fire protection, low hygroscopisity, good basis for applying e.g. varnishes and stain, including low corrosion of nails and similar located inside or adjacent to the wood.
  • the impregnation solution is prepared from the preferred composition above in two separate batches, which then are combined and pH adjusted to a range of 1.5 to 4.3.
  • the blending of the respective components may also occur in one step, but with regard to possible precipitation at preparation of concentrated solutions, it is usually preferred to divide the preparation of the composition in two steps or batches.
  • Composition A A.
  • composition B is added to composition A with constant stirring.
  • the pH is adjusted to 3.5-3.7 with ammoniumacetate to increase pH if required, or phosphoric acid to decrease pH if required.
  • the stirring is terminated, and the solution is allowed to rest for settling.
  • the pH of the solution can be decreased with sulphuric acid, hydrochloric acid and/or acetic acid, and increased with alkaline compounds such as ammonium hydroxide.
  • ammoniumacetate is preferred because of its fire retardant effect after precipitation in the impregnated material.
  • Impregnation of timber or wood is best performed in a conventional impregnation plant for wood. After the wood has been placed in the impregnation plant, the wood is subjected to a low pressure of 50 mbar for at least 20 minutes. Impregnation solution is supplied into the impregnation plant, and the wood is pressurized, preferably to 16 bar until the desired amount of liquid has penetrated the wood (2-10 hours).
  • the solution should contain from 5 to 55 weight percent of solids with regard to the total weight of the solution, e.g. having the preferred composition as stated above.
  • the wood is dried in a conventional wood dryer preferably at 60° C, and in an atmosphere having a gradually decreasing humidity content and continous or batchwise removal of acetic acid from the drying atmosphere to maintain a concentration gradient of acetic acid during the stripping of the same, whereby the acetic acid is stripped off the wood. After drying the wood should contain 15-40 weight percent of the impregnated composition (solids) with respect to the mass of dry wood.
  • Impregnation of textiles Textiles of rayon, cotton, wool, composite textiles or textiles of other combustible and water absorbant materials are dipped in the impregnation solution, or the impregnation solution is sprayed onto the same.
  • concentration of the impregnation solution will be dependent on the mode of treatment, and will typically be within the range from 5 to 25 weight percent solids on the basis of the total mass of the liquid. Particles having a diameter above 100 micrometer are removed by filtration. After dipping, the excess liquid is pressed out, followed by drying of the textiles. After drying the textiles should exhibit weight increase of 10-15% in the form of solids from the impregnation solution.
  • Impregnation of textiles in accordance with the present invention results in an impregnated material having small sized and uniformly distributed fire retardant metal salts, for example ⁇ 20 micrometer, and in this way the material will have the same consistency, e.g. softness, even after impregnation.
  • the present invention contrary to comparable prior art methods, also secures a well controllable impregnation with regard to the amount of fire retardant components absorbed in the textile material.
  • Paper and paper products are impregnated in a way similar to impregnation of textiles.
  • the air conditioning chamber had a relative humidity xof about 100% and a temperature of about 25°C. Observations and measurements were performed once a day. The samples were then conditioned at ambient temperature until the humidity content of the wood remained stable. The test results did not show any salt expulsion during or after the test period, and the humidity absorption was below the limit level according to ASTM-D3201-86.
  • the present invention accordingly provides a novel agent for impregnation of normally combustible material, which offers impregnation in one step and fulfils the requirements with respect to hygroscopisity, toxicity, discoloring of impregnated material including corrosion of metal components mounted inside or adjacent to impregnated material.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)

Abstract

Composition aqueuse ignifuge et retardatrice de fumée, et procédé d'imprégnation en une seule étape de matériaux absorbant l'eau et normalement combustibles, par exemple le bois, le papier et les textiles. Ladite composition comporte des phosphates d'ammonium, des sels métalliques hydrosolubles et éventuellement d'autres additifs tels que des fongicides. La composition comporte, en association, de 0,5 à 40 % en poids de monophosphate d'ammonium et/ou de diphosphate d'ammonium, de 5 à 30 % en poids d'un composé d'ammonium hydrosoluble et dissociable, de 10 à 60 % en poids d'un sel métallique hydrosoluble apte à former des sels non hydrosolubles avec des ions de phosphate et/ou des ions de phosphate d'ammonium, de 0 à 30 % en poids d'acide phosphorique (85 %), de 1 à 20 % en poids d'acide acétique, et éventuellement 5 % en poids d'additifs, leur concentration totale allant de 1 à 55 % en poids par rapport au poids total de la solution aqueuse.
PCT/NO1995/000113 1994-06-28 1995-06-27 Agent ignifuge WO1996000763A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
AU28997/95A AU2899795A (en) 1994-06-28 1995-06-27 Fire protecting agent
DE19581683T DE19581683T1 (de) 1994-06-28 1995-06-27 Feuerschutzmittel
NO953316A NO180524C (no) 1994-06-28 1995-08-24 Brannhemmende blanding og framgangsmåte for impregnering av normalt antennelig materiale
FI965112A FI965112A (fi) 1994-06-28 1996-12-19 Palosuojausaine
DK146496A DK146496A (da) 1994-06-28 1996-12-20 Brandsikringsmiddel
SE9604745A SE510143C2 (sv) 1994-06-28 1996-12-20 Brandskyddsmedel

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO942438A NO942438D0 (no) 1994-06-28 1994-06-28 Brannhemmende middel og framgangsmåte for impregnering av normalt antennelig materiale
NO942438 1994-06-28

Publications (1)

Publication Number Publication Date
WO1996000763A1 true WO1996000763A1 (fr) 1996-01-11

Family

ID=19897218

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO1995/000113 WO1996000763A1 (fr) 1994-06-28 1995-06-27 Agent ignifuge

Country Status (7)

Country Link
AU (1) AU2899795A (fr)
DE (1) DE19581683T1 (fr)
DK (1) DK146496A (fr)
FI (1) FI965112A (fr)
NO (1) NO942438D0 (fr)
SE (1) SE510143C2 (fr)
WO (1) WO1996000763A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997039083A1 (fr) * 1996-04-13 1997-10-23 Albright & Wilson Uk Limited Suspensions epaisses de polyphosphate d'ammonium
WO1998023807A1 (fr) * 1996-11-26 1998-06-04 Alchimea Naturwaren Gmbh Procede d'appretage de fibres
WO1998024604A1 (fr) * 1996-12-04 1998-06-11 Fireguard Scandinavia As Composition ignifuge et procede d'impregnation de matieres combustibles
EP1160305A2 (fr) * 2000-06-03 2001-12-05 Semmelroth-Consulting GmbH Procédé de production d'un agent ignifuge pour des matériaux combustibles
DE202011102812U1 (de) * 2011-06-14 2011-12-05 Hachemie Hamburger Chemikalien-Gesellschaft Mbh Wärmedämmstoff aus Altpapier mit Flammschutzmittelzusammensetzung
EP2657319A1 (fr) * 2012-04-27 2013-10-30 K+S KALI GmbH Composition à base de sulfate de magnésium et de di-ammonium hydrogénophosphate
WO2019214793A1 (fr) 2018-05-11 2019-11-14 Burnblock Holding Aps Composition ignifuge et de durcisseur latent, procédé de fabrication de composites à base de bois et de fibres de cellulose ignifugés et panneaux et panneaux à base de bois et de fibres de cellulose ignifugées
EP3733817A1 (fr) * 2019-04-30 2020-11-04 Schreiber GmbH Solution d'imprégnation exempt de bore pour une mèche et mèche exempte de bore

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GB1171475A (en) * 1966-10-27 1969-11-19 Coal Industry Patents Ltd Fireproofing Timber
GB2108164A (en) * 1981-10-19 1983-05-11 Sargom Company Limited The Flame retardant composition
WO1991000326A1 (fr) * 1989-07-03 1991-01-10 Fire Guard Scandinavia As Melange retardant la fumee et les flammes

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Publication number Priority date Publication date Assignee Title
GB1171475A (en) * 1966-10-27 1969-11-19 Coal Industry Patents Ltd Fireproofing Timber
GB2108164A (en) * 1981-10-19 1983-05-11 Sargom Company Limited The Flame retardant composition
WO1991000326A1 (fr) * 1989-07-03 1991-01-10 Fire Guard Scandinavia As Melange retardant la fumee et les flammes

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997039083A1 (fr) * 1996-04-13 1997-10-23 Albright & Wilson Uk Limited Suspensions epaisses de polyphosphate d'ammonium
WO1998023807A1 (fr) * 1996-11-26 1998-06-04 Alchimea Naturwaren Gmbh Procede d'appretage de fibres
WO1998024604A1 (fr) * 1996-12-04 1998-06-11 Fireguard Scandinavia As Composition ignifuge et procede d'impregnation de matieres combustibles
AU723496B2 (en) * 1996-12-04 2000-08-31 Fireguard Scandinavia As Fire retarding composition and a method for impregnation of a combustible material
EP1160305A2 (fr) * 2000-06-03 2001-12-05 Semmelroth-Consulting GmbH Procédé de production d'un agent ignifuge pour des matériaux combustibles
DE10027717A1 (de) * 2000-06-03 2001-12-06 Semmelroth Consulting Gmbh Verfahren zur Herstellung eines Feuerschutzmittels für brennbare Materialien
EP1160305A3 (fr) * 2000-06-03 2003-09-03 Semmelroth-Consulting GmbH Procédé de production d'un agent ignifuge pour des matériaux combustibles
DE202011102812U1 (de) * 2011-06-14 2011-12-05 Hachemie Hamburger Chemikalien-Gesellschaft Mbh Wärmedämmstoff aus Altpapier mit Flammschutzmittelzusammensetzung
EP2657319A1 (fr) * 2012-04-27 2013-10-30 K+S KALI GmbH Composition à base de sulfate de magnésium et de di-ammonium hydrogénophosphate
WO2013159930A1 (fr) * 2012-04-27 2013-10-31 K+S Kali Gmbh Composition à base de sulfate de mangésium et d'hydrogénophosphate de diammonium
US9487706B2 (en) 2012-04-27 2016-11-08 K+S Kali Gmbh Composition based on magnesium sulfate and diammonium hydrogenphosphate
WO2019214793A1 (fr) 2018-05-11 2019-11-14 Burnblock Holding Aps Composition ignifuge et de durcisseur latent, procédé de fabrication de composites à base de bois et de fibres de cellulose ignifugés et panneaux et panneaux à base de bois et de fibres de cellulose ignifugées
EP3733817A1 (fr) * 2019-04-30 2020-11-04 Schreiber GmbH Solution d'imprégnation exempt de bore pour une mèche et mèche exempte de bore
WO2020221881A3 (fr) * 2019-04-30 2020-12-30 Schreiber Gmbh Solution d'imprégnation sans bore pour une mèche et mèche sans bore
CN113785037A (zh) * 2019-04-30 2021-12-10 施雷伯有限责任公司 用于烛芯的无硼的浸渍溶液以及无硼的烛芯
US20220220415A1 (en) * 2019-04-30 2022-07-14 Schreiber Gmbh Boron-free impregnating solution for a wick and boron-free wick
US11912959B2 (en) 2019-04-30 2024-02-27 Schreiber Gmbh Boron-free impregnating solution for a wick and boron-free wick

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SE9604745D0 (sv) 1996-12-20
DK146496A (da) 1996-12-20
SE9604745L (sv) 1996-12-20
SE510143C2 (sv) 1999-04-26
DE19581683T1 (de) 1997-05-22
NO942438D0 (no) 1994-06-28
AU2899795A (en) 1996-01-25
FI965112A0 (fi) 1996-12-19
FI965112A (fi) 1996-12-19

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