JP2007090839A - Fireproof wooden material or fireproof building material, manufacturing process thereof and fireproofing agent - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing process of a fireproof wooden material or a fireproof building material which can be used in the types of buildings where use of wooden materials are restricted because of their vulnerability to fire, and a fireproofing agent. <P>SOLUTION: The manufacturing process comprises impregnating a wooden material with a boron-containing aqueous solution which contains ≥3 wt.% and ≤8 wt.%, preferably ≥4 wt.%, more preferably ≥5 wt.% of boron and has a PH adjusted between 6 and 8, followed by drying the wooden material. The manufacturing process of the fireproof building material comprises coating the fireproof wooden materials as obtained above with a silane coupling agent and a resin-based adhesive and bonding them. The fireproofing agent used for the fireproof wooden material or the fireproof building material is an aqueous solution containing boron in an amount of ≥5 wt.% and has a pH adjusted between 6 and 8 with a compound containing Na (sodium) or K (potassium). <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a method for manufacturing a fire-resistant wood material or building material that can be used in buildings where the use of wood materials has been limited due to fire resistance problems. The present invention also relates to a wood or building material having a high fire resistance. The present invention also relates to a fireproofing agent for imparting high fireproof performance.

Although wood materials retain extremely useful performance as building materials, they have the weakness of being easily burned, so they are not suitable for use in high-rise buildings (for example, high-rise buildings) and buildings used by an unspecified number of people. It was restricted.
In the past, many researches and developments have been carried out to make wood materials flame-retardant in order to overcome the drawbacks of wooden materials as building materials. That is, trials on the surface of a wood material of a flame-retardant inorganic coating material, a composite with a metal-based construction material, or impregnation into a wood material of a special chemical substance. However, since the complexity and difficulty of processing, the problem in price, the quality deterioration in long-term use, etc. have not been solved, it has not been put into practical use widely.

  For example, boron compounds such as boric acid and borax are relatively inexpensive and easy to handle, and thus have been conventionally used to increase the fire resistance of wooden materials. However, in order to obtain sufficient fire resistance, it is necessary to prepare a large amount of boron as a stable aqueous solution and impregnate a sufficient amount of this into a wooden material. There was a problem that it was difficult to obtain and precipitation and aggregation of components occurred. Precipitation and aggregation of these components lead to a decrease in the amount of the solution impregnated or injected into the wood material, and also a decrease in the boron concentration itself in the aqueous solution. As a result, sufficient fire resistance performance could not be obtained. In order to solve this, after impregnating a wooden material with a boron-containing aqueous solution, once drying it, and further impregnating the same boron-containing aqueous solution into the wooden material, and further drying, a method of performing injection in two steps However, since such a method for manufacturing a refractory wood material requires a complicated manufacturing process, sufficient fire resistance can be obtained by a single impregnation with a boron-containing aqueous solution. The development of a method for manufacturing wood materials has been desired.

  In addition, it is difficult to inject a sufficient amount of an aqueous solution containing boron into a wooden material. To solve this problem, a sufficient amount of wooden material such as thin wooden boards, small pieces of wood, and wooden fibers is sufficient. There has also been proposed a method of injecting a boron-containing aqueous solution of the above and again forming it into a size useful as a building material by bonding. However, since a boron compound contained in a large amount in such a wood material hinders adhesion, there is a drawback that sufficient strength as a building material cannot be obtained. In particular, when such building materials are used in an environment where they come into contact with moisture such as rain water, the adhesive strength is insufficient, and thus there is a drawback that the wood materials are peeled off or cracked.

  In addition, boron-based compounds injected into wooden materials have a problem of leaching when the wooden materials are used in an environment where they come into contact with moisture such as rainwater. To solve this problem, various organic compounds are converted into boron-based compounds. A method of mixing and pouring into a wooden material is performed. However, such a method requires a large amount of an organic compound, and a method for preventing leaching of a boron compound by a more economical method has been demanded. Such suppression of leaching is important for avoiding adverse effects on living organisms in the environment and for maintaining fire resistance. Furthermore, the boron compound has an insect repellent effect against insects that damage woody materials such as termites and bark beetles, but there is a problem that such an insect repellent effect is simultaneously reduced by leaching.

  In addition, there has been a demand for an effective treatment agent for imparting effective fire resistance to an article that easily ignites and burns due to a fire or the like.

An object of the present invention is to provide a method for producing a wood material having high fire resistance.
Another object of the present invention is to provide a method for producing a building material produced by bonding, which has sufficient adhesive strength as a building material and has high fire resistance.
Another object of the present invention is to improve a leaching property of a boron-based compound and to provide a wood material or a building material imparted with a high fire resistance and a protective effect.
Another object of the present invention is to provide a fireproofing agent for imparting high fireproof performance.

Uses boron-based compounds that have a small impact on the strength and color of wood, are inexpensive and have insect repellent properties, avoids adverse effects on the bonding strength of boron-based compounds, suppresses leaching of boron-based compounds due to rainwater, etc., and In order to achieve high fire resistance by impregnating wood with a sufficient amount of boron-based compounds, intensive research was conducted.
As a result, it is possible to obtain a treated product having high fire resistance by using a boron-containing aqueous solution produced under specific conditions for a wood material, etc., and the obtained fire resistant wood material is bonded to a silane coupling agent and a resin system. The present invention has been completed by finding that by combining and / or adhering a combination of agents, it is possible to effectively suppress leaching of boron compounds and to obtain a building material having high fire resistance and further high adhesive strength. It came to be.

That is, the present invention provides the following.
In the method for producing a refractory wood material according to claim 1 of the present invention, the boron element content is 3 wt% or more and 8 wt% or less, preferably 4 wt% or more, more preferably 5 wt%, and the pH is A wood material is impregnated with a boron-containing aqueous solution adjusted to 6 to 8, and then the wood material is dried.

  The invention according to claim 2 is characterized in that, in the method for producing a refractory wood material according to claim 2, the wood material is impregnated while being heated so that the temperature of the boron-containing aqueous solution becomes 50 ° C. or higher. And

  Invention of Claim 3 is a manufacturing method of the fire-resistant wood material of Claim 1 or Claim 2, In the fire-resistant wood material obtained by the method of the said Claim 1 or Claim 2, Furthermore, a silane coupling agent and a resin-based paint are applied.

  According to a fourth aspect of the present invention, in the method for producing a fireproof wood material according to the third aspect, when the silane coupling agent and the resin-based paint are applied, the silane coupling agent is applied and then the resin-based paint is applied. Alternatively, a mixture of a silane coupling agent and a resin paint is applied.

  The invention of claim 5 is the method for producing a refractory wood material according to claim 3 or claim 4, wherein the resin-based paint is a paint selected from the group consisting of isocyanate, urethane and acrylic. And

  Invention of Claim 6 is the method of any one of Claims 1-5 in the manufacturing method of the fireproof construction material as described in any one of Claims 1-5. A silane coupling agent and a resin adhesive are further applied to the obtained refractory wood material to bond the refractory wood material.

  The invention according to claim 7 is the method for producing a fire-resistant building material according to claim 6, wherein when the silane coupling agent and the resin adhesive are applied, the silane coupling agent is applied and then the resin adhesive is applied. An agent is applied, or a mixture of a silane coupling agent and a resin adhesive is applied.

  The invention according to claim 8 is the method for producing a fire-resistant building material according to claim 6 or 7, wherein the resin adhesive is phenol resin, resorcinol resin, isocyanate resin, melamine resin, urea resin. It is an adhesive selected from the group consisting of a series, a melamine-urea resin system, a urethane resin system, an epoxy resin system, and an acrylic resin system.

    The invention of claim 9 is a fireproof wood material or a fireproof construction material obtained by the method according to any one of claims 1 to 8, wherein the fireproof wood material or the fireproof construction material.

  The invention of claim 10 is the fire-resistant wood material or fire-resistant building material according to claim 9, wherein the dry weight of the wood material before impregnating the boron-containing aqueous solution is 100 parts by weight, and 2 parts by weight or more of boron element Is contained.

  The invention of claim 11 is the fire-resistant wood material or fire-resistant building material according to any one of claims 1 to 8 and its manufacturing method, wherein the fire-resistant treatment agent has a boron element content of 5 It is an aqueous solution having a pH adjusted to 6 to 8 with a compound containing Na (sodium) or K (potassium) in an amount of 8 wt% to 8 wt%.

  In the present invention, an aqueous solution containing a boron-based compound at a high concentration is impregnated into a wooden material as a fireproofing agent, and after drying the wooden material, application of a silane coupling agent and a resin-based paint, and / or Adhesion with silane coupling agents and resin adhesives improves boron compound leaching, resulting in good fire and insect resistance even when used outdoors in environments where rainwater comes into contact. Can be achieved.

  In addition, according to the present invention, it becomes possible to join a refractory wood material containing a boron-based compound at a high concentration with a high adhesive strength, and as a result, a useful fire-resistant building material that can be used for various applications. Can be obtained.

  Moreover, it becomes possible to manufacture various fireproof processed products by the fireproofing agent of the present invention.

  The woody material used in the present invention is a timber, board, round bar, thin plate (lamina), chip, fiber, powder, or wood derived from plants such as wood, bamboo, fir shell, cocoon grass, straw, hemp, cotton, etc. These are processed products. When impregnated and dried with the boron-containing aqueous solution disclosed in the present invention and used as a refractory wood material, square bars, plates and round bars are preferably used.

  Moreover, when the wood-containing material is impregnated with the boron-containing aqueous solution disclosed in the present invention, dried, and further bonded by the bonding method of the present invention, the wood-based material impregnated with the boron-containing aqueous solution is preferably used. Uses lamina, chips, fibers and powder, and the resulting building materials are fire-resistant laminated wood, plywood, LVL, OSB, particle board, fiber board, MDF (medium density fiber board) Etc. A building material obtained by such a method is injected with a large amount of a boron-containing aqueous solution in a wood material that can be easily injected, such as a thin plate (lamina), chip, fiber, powder, etc., thereby imparting high fire resistance performance. . Further, these building materials can be widely used as building materials by processing such as cutting, drilling and painting.

The boron-based compound used for the preparation of the boron-containing aqueous solution used in the present invention is a compound containing a boron element, such as boric acid (orthoboric acid), borate, metaboric acid, metaborate, pyroborate. Acid, pyroborate, tetraborate, tetraborate, borax (sodium tetraborate, Na ₂ B ₄ O ₇ · 10H ₂ O), anhydrous sodium borate, sodium borate pentahydrate, penta Examples thereof include sodium borate, octaborate, octaborate, disodium octaborate tetrahydrate, ammonium borate, and boron trioxide.

  The level of fire resistance of the fire-resistant wood material or fire-resistant building material obtained by the present invention can be adjusted by the concentration of boron element contained in the boron-containing aqueous solution used, in order to obtain practical fire resistance The concentration of boron element in the boron element-containing aqueous solution necessary for the above is 3 wt% or more and 8 wt% or less, preferably 4 wt% or more, more preferably 5 wt% or more.

The boron-containing aqueous solution used in the present invention is prepared by using the above boron compounds alone or in combination, and, if necessary, alkali metal-containing compounds, alkaline earth metal-containing compounds, ammonia compounds, amine compounds, etc. An alkaline compound, specifically NaOH, KOH, Ca (OH) ₂ , NH ₃ , monoethanolamine is used, water is used as a solvent, and the pH is in the range of 6 to 8, more preferably 6.5 kara 7.5. This is done by adjusting so that If necessary, a mineral acid such as sulfuric acid, or an organic acid such as citric acid, malic acid, acetic acid, or octanoic acid can be used as a pH adjuster.

In addition, the fireproofing agent disclosed in the present invention includes boric acid (orthoboric acid), borate, metaboric acid, metaboric acid, pyroboric acid, pyroboric acid, tetraboric acid, tetraboric acid as a source of boron element. Salt, borax (sodium tetraborate, Na ₂ B ₄ O ₇ · 10H ₂ O, Na ₂ [B ₄ O ₅ (OH) ₂ ] · 8H ₂ O), anhydrous sodium borate, sodium borate · 5 water Japanese, sodium pentaborate, octaborate, octaborate, disodium octaborate tetrahydrate, ammonium borate, boron trioxide, Na (sodium) or K (potassium) -Containing compounds, specifically, borax, anhydrous sodium borate, sodium borate pentahydrate, sodium pentaborate, disodium octaborate tetrahydrate, NaOH, KOH Used as The content of the boron element in the aqueous solution finally obtained, with 5 wt% or more, from the pH is 6-8, and more preferably obtained by adjusting so that the range of 6.5 to 7.5.

  The fireproofing agent of the present invention is extremely useful as a treating agent for fireproofing the various wood materials described above. The fireproofing agent of the present invention is also useful as a treating agent for fireproofing flammable porous articles such as paper, leather, articles containing cellulosic materials, articles such as nonwoven fabrics made of synthetic fibers, and the like. is there. When fireproofing paper, leather, nonwoven fabric, or the like using the fireproofing agent of the present invention, a dipping method or a coating method can be suitably used as a method for impregnating the treating agent.

  In order to avoid precipitation of boron-based compounds and poor impregnation of woody materials due to high viscosity in the storage and impregnation process of boron-containing aqueous solution or refractory treatment agent used in the present invention, boron-containing aqueous solution or refractory It is useful to heat the treatment agent and impregnate the wood material or the like in the heated state. The degree of heating is determined according to the concentration of the boron-based compound contained. For example, when the content as a boron element is 5.5 to 6% by weight, it is 50 ° C. or more, and when it is 6 to 7% by weight. Is preferably 70 ° C. or higher. The upper limit of the temperature setting in heating is the boiling point as an aqueous solution.

When the wood material is impregnated with the boron-containing aqueous solution of the present invention, various commonly used steps for impregnation such as a pressurization and / or decompression step, immersion, coating, and the like can be applied. Specifically, as the pressurization and / or depressurization step, the full cell method (Bethel method), the semi-empty cell method (Lowry method), the double vacuum method (double vacuum method), the alternating pressure-reducing method (Oscillating Pressure)
Method) and a combination of these operations are applicable. In addition, an insizing method, a compression treatment using a roller, microwave heating, freezing treatment, steaming treatment, steaming treatment, or heat treatment can also be applied as a pretreatment step for the wood material for increasing the amount of impregnation. .

  Before carrying out the painting step or bonding step disclosed in the present invention, the water content in the wood material impregnated with the boron-containing aqueous solution, that is, it exists as free water in the cell void portion of the wood material, or the wood material The moisture content contained in the cellulose structure part or lignin structure part is 30% by weight or less, preferably 20% by weight or less, more preferably, based on the weight of the wood before impregnating the boron-containing aqueous solution by the drying step. It is desirable to adjust to 10% by weight or less. Such a drying step can be performed by room temperature drying, and can also be performed by a heat drying facility used for ordinary wood drying.

  The coating on the dried refractory wood material produced by the above method is carried out for the purpose of suppressing leaching of boron compounds contained in the wood material due to rain water or the like.

The painting method of the present invention is roughly divided into the following two methods.
1. A method in which a silane coupling agent is applied to the surface of a wooden material, and then a resin-based paint is further applied thereon.
2. A method in which a silane coupling agent and a resin-based paint are mixed in advance and this is applied to the surface of a wooden material.

  The intention of the present invention is to protect the surface of the wood material with both the silane coupling agent and the resin-based paint, and a typical method for this is application, but in addition, spraying treatment, dipping treatment, It is possible to carry out a combination of injection treatment using pressurization or decompression. Examples of such a combination method include a method in which a refractory wood material is immersed in a solution of a silane coupling agent, the wood material is taken out from the solution, dried, and further sprayed with a resin-based paint.

In the present invention, typical examples of the silane coupling agent used for treating the surface of the refractory wood material include an amino group, a vinyl group, a methacryloxy group, a glycidoxy group, a mercapto group, and a chloro group in the structure portion, and silicon. As the structure of the element and its periphery, a trimethoxysilyl group (Si (OMe) ₃ ), a methyldimethoxysilyl group (SiMe (OMe) ₂ ), a triethoxysilyl group (Si (OEt) ₃ ), a methyldiethoxysilyl group ( And a compound containing SiMe (OEt) ₂ ) in the structural portion, preferably γ-aminopropyltriethoxysilane, γ-chloropropyltriethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-glycid Xylpropylmethyldimethoxysilane, γ-methacryloxypropyltrimethoxysilane, γ-methacryloxyp Propylmethyldimethoxysilane, γ-mercappropyltrimethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, N- (β-aminoethyl) -γ-aminopropyltriethoxysilane, N- (β-aminoethyl) -Γ-aminopropylmethyldimethoxysilane can be used.

  These silane coupling agents include alcohol solvents such as isopropyl alcohol, ethanol and methanol, ether organic solvents such as diethyl ether, ester organic solvents such as phthalate ester and ethyl acetate, and methyl halide organic such as dichloromethane. The method of coating after diluting with a solvent, an ethyl halide organic solvent such as dichloroethane, is useful as a method for uniformly applying an expensive silane coupling agent to the surface of the refractory wood.

  In addition, boric acid, borate, phosphoric acid, phosphate, silicic acid, silicate, zirconium chloride, ammonium chloride, zinc chloride, aluminum chloride, magnesium sulfate, magnesium fluoride, or silane coupling agent After adding a high concentration boron-containing aqueous solution disclosed in the invention, adjusting the concentration with water, stirring, the silane coupling agent is dissolved and then applied to the surface of the refractory wood. This is useful as a method for improving the ignitability and achieving uniform application to the surface of the refractory wood.

  In the present invention, suitable examples of the resin-based paint used for the treatment of the surface of the refractory wood material are isocyanate-based paint, urethane-based paint, and acrylic-based paint. In particular, an isocyanate-based paint composed of a main agent having a hydrophilic group such as polyol and hydroxyl group and a curing agent having an isocyanate group, and an aqueous urethane-based paint having a hydrophilic group such as carboxyl group and sulfonic acid introduced therein. Water-based urethane paints, water-based vinyl urethane paints, water-dispersed paints, and oil-based paints can be used more suitably.

  By bonding the dried refractory wood material produced by the above method, or the refractory wood material coated by combining the silane coupling agent and the resin-based paint by the above method, a useful size, length, A building material having a thickness is produced. Such a building material is extremely useful from the viewpoint of environmental safety and fire resistance because the leaching of boron-based compounds is suppressed by the adhesive layer.

The application method of the adhesive to the fireproof wood material carried out in the present invention is roughly divided into the following two methods.
1. A method in which a silane coupling agent is applied to a wood material bonding surface, and then a resin adhesive is further applied thereon or on the other wood material bonding surface to be bonded to the bonding surface.
2. A method in which a silane coupling agent and a resin-based adhesive are mixed in advance and applied to the wood material bonding surface.

  Of these methods, which one should be selected may be selected in accordance with the equipment used for bonding and the number of personnel that can be input, but in general, a silane coupling agent and a resin adhesive are used in advance. The method of mixing and apply | coating this to a wooden material adhesion surface is simpler.

  In the present invention, a typical example of the silane coupling agent used for adhesion of the refractory wood material is the above-mentioned silane coupling agent, which is applied to the adhesion surface after being diluted with an organic solvent in the same manner as described above. This method is useful as a method for uniformly applying an expensive silane coupling agent to an adhesive surface.

  As described above, boric acid, borate, phosphoric acid, phosphate, silicic acid, silicate, zirconium chloride, ammonium chloride, zinc chloride, aluminum chloride, magnesium sulfate, fluorine A method in which magnesium silane or a high concentration boron-containing aqueous solution disclosed in the present invention is added, the concentration is adjusted with water, and then the silane coupling agent is dissolved by stirring and then applied to the fire-resistant wood material bonding surface Is useful as a method for achieving improved fire resistance on the bonded surface and uniform application to the bonded surface.

  In the present invention, the resin adhesive used in the bonding step together with the silane coupling agent is selected from phenol resin, resorcinol resin, isocyanate resin, melamine resin, urea resin, melamine-urea resin, urethane resin, epoxy resin, and acrylic resin. It is an adhesive selected from the group consisting of, and the conditions for curing these adhesives can be the same as the usual conditions used for curing these adhesives. For example, when using thermosetting resins such as phenol resin, resorcinol resin, melamine resin, urea resin, melamine-urea resin, it is usually added to these resin adhesives, flour, calcium carbonate, cured An accelerator or the like can also be used.

  The combination of the silane coupling agent and the resin-based paint or resin-based adhesive used in the present invention can be implemented in various combinations. Preferably, the silane coupling agent is an amino group or a glycidoxy group. As a silane coupling agent, a resin-based paint, an isocyanate-based paint or a urethane-based paint, and a resin-based adhesive used in combination with a phenol resin or an isocyanate resin.

The suitable usage-amount of the silane coupling agent used in this invention is 1-200g per 1 m < ² > of the area of a coating surface or an adhesion surface, More preferably, it is 4-40g.

Moreover, in this invention, the suitable usage-amount of the resin-type coating material used with a silane coupling is 40-800g per 1 m < ² > of a coated surface, More preferably, it is 100-300g. Further, when the silane coupling agent and the resin-based paint are mixed and used, they are used in the same amount. Therefore, a suitable mixing ratio of the silane coupling agent and the resin-based paint in this case is 0.001. -5, more preferably 0.01-2.

Moreover, in this invention, the suitable usage-amount of the resin-type adhesive agent used with a silane coupling is 50-1000g per 1 m < ² > of an adhesive surface, More preferably, it is 150-500g. Further, when the silane coupling agent and the resin adhesive are mixed and used, they are used in the same amount. Accordingly, in this case, the preferred mixing ratio of the silane coupling agent and the resin adhesive is 0. 0.001 to 4, more preferably 0.008 to 1.

  In the fire-resistant wood material or fire-resistant building material obtained by using the technology disclosed in the present invention, in order to obtain sufficient fire resistance, the dry weight of the wood material before impregnating the boron-containing aqueous solution is 100 parts by weight. It is desirable that the weight of the boron element contained in the fire-resistant wood material or the fire-resistant building material is 2 parts by weight or more, more preferably 5 parts by weight or more. In applications that can be used even at low levels of fire resistance, it is also possible to use less than 2 parts by weight of boron element contained in refractory wood or fire resistant building materials.

  In addition, the fire-resistant wood material or fire-resistant building material obtained by the present invention has insect repellent properties derived from boron compounds, but in order to further impart antibacterial or insect repellent properties to the wood material, it is synergistic. By using a combination of other preservatives or insecticides having an effect, it is possible to effectively protect the woody material against termites, bark beetles, fungi, white rot fungi, brown rot fungi, soft rot fungi, and the like.

  In addition, by adding a preservative or insecticide having a synergistic effect with the boron compound to the fireproofing agent disclosed in the present invention, it is possible to give effective antiseptic or insecticidal properties to the treated product. It is.

  Preferred examples of the preservative or insecticide used for such purposes include azoles, sulfenamides, benzimidazoles, thiocyanates, morpholine derivatives, organic iodines, organic bromos, isothiazolines, benzisothiazolines. , Pyridines, dialkyldithiocarbamates, nitriles, microbial agents with active halogen atoms, benzthiazoles, cyclodienes, nitroso, quinolines, formaldehyde and formaldehyde-forming substances, fluorine-based substances, organophosphorus compounds, phosphorus Examples include acid esters, carbamates, pyrethroids, nitroimino and nitromethylenes, quaternary ammonium compounds, phenol derivatives, metal compounds, metal soaps, and urea compounds.

  Specific examples of synergistic preservatives or insecticides used for the above purposes include azaconazole, etaconazole, propiconazole, bromoconazole, difenoconazole, itraconazole, flutriahol, microbutanyl, phenetamil, penconazole , Tetraconazole, hexaconazole, tebuconazole, imibenconazole, flusilazole, ribavirin, triamifos, isazofos, triazophos, idinphos, flutrimazole, triadimethone, triadimenol, diclobutrazole, diniconazole, diniconazole M, viteltanol, epoxy Azole such as conazole, triticonazole, metconazole, ipconazole, fluconazole, fluconazole cis, cyproconazole Sulfonamides such as dichlorofluanide (Eupalene), trifluanide (Methylreupalene), cyclofluoride, phorpet, fluorophorpet; benzimidazoles such as carbendazim, benomyl, fuberitazole, thiabendazole, or salts thereof; thiocyanate methylthio Thiocyanates such as benzothiazole, methylenebisthiocyanate; C11-C14-4-alkyl-2,6-dimethylmorpholine homologue (tridemorph), (±) -cis-4- [3- (t-butylphenyl) -2 Morpholine derivatives such as -methylpropyl] -2,6-dimethylmorpholine (fenpropimorph, farimorph); 3-iodo-2-propyl-n-butylcarbamate, 3-iodo-2-propyl-n-he Xyl carbamate, 3-iodo-2-propylcyclohexyl carbamate, 3-iodo-2-propylphenyl carbamate, p-chlorophenyl-3-iodopropargyl formal, 3-bromo-2,3-diiodo-2-propenylethyl carbonate (Sanplus), organic iodines such as 1-[(diiodomethyl) sulfonyl] -4-methylbenzene (amicar); 2-bromo-2-nitro-1,3-propanediol, 2-bromo-2-bromomethyl Organic bromos such as glutardinitrile and bronopol; N-methylisothiazolin-3-one, 5-chloro-N-methylisothiazolin-3-one, 4,5-dichloro-N-octylisothiazolin-3-one, N -Octylisothiazolin-3-one (octyrinone) Thiazolines; cyclopentaisothiazoline, benzisothiazolines such as 4,5-trismethylene-N-methylisothiazol-3-one; 1-hydroxy-2-pyridinethione (or its sodium, iron, manganese, zinc) Pyridines such as tetrachloro-4-methylsulfonylpyridine; sodium or zinc salts of dialkyldithiocarbamates, dialkyldithiocarbamates such as tetramethyldiuram disulfide (TMTD); 2,4,5,6- Nitriles such as tetrachloroisophthalonitrile (chlorothalonil); microbial agents having an active halogen atom such as C1-Ac, MCA, tectamer, bronopol, blomidox; benzthia such as 2-mercaptobenzothiazoles and dazomet Cyclodienes such as chlordane, dieldrin, aldrin, heptachlor; Nitroso such as N-nitroso-N-cyclohexylhydroxylamine; Quinolines such as 8-hydroxyquinoline and its copper salt; Benzyl alcohol mono (poly) hemi Formaldehyde-generating substances such as formal, oxazolidine, hexahydro-s-triazine, N-methylol chloroacetamide, paraformaldehyde; fluorine-based substances such as sodium fluoride, potassium fluoride, sodium silicofluoride, magnesium silicofluoride; thiofamate methyl , Dasban, diazinon and other organic phosphorus compounds; azinophos-ethyl, azinophos-methyl, 1- (4-chlorophenyl) -4- (O-ethyl, S-propyl) phosphoryloxypyra Sol (TIA-230), chloropyrifos, tetrachlorobinphos, coumafos, detomen-S-methyl, diazinone, dichlorvos, dimethoate, etoprofos, etrimphos, fenitrothion, pyridafenthione, heptenophos, parathion, parathion-methyl, propetanephos, fosalon, Phosphate, pyrimphos-ethyl, pyrimiphos-methyl, profenofos, prothiofos, sulfophos, triazophos, torquelophone, etc .; aldicarb, Beniocurve, BPMC, 2- (1-methylpropyl) phenylmethylcarbamate, Butcarboxyme, butoxycarboxyme, carbaryl, carbofuran, carbosulfan, chloetocarb, isoprocarb, methomyl, Carbamates such as oxamyl, pirimicarb, promecarb, propoxur, tidicarb, bigon, dimethylane, sebin; alletrin, alphamethrin, violethmethrin, cycloprotorin, cyfluthrin, decamethrin, cyhalothrin, cypermethrin, deltamethrin, α-cyano-3-phenyl -2-methylbenzyl-2,2-dimethyl-2- (2-chloro-2-trifluoromethylvinyl) cyclopropane-1-propanecarboxylate, phenpropatoline, fenfluthrin, fenvalerate, flucitrinate, Pyrethroids such as flumtrin, fulvalinate, permethrin, etofenprox, resmethrin, silafluophene; imidacloprid, acetamiprid, nitenpyram, thiamethoxam , Nitroimino and nitromethylenes such as thiacloprid, dinotefuran, clothianidin; quaternary ammonium compounds such as didecyldimethylammonium chloride, benzyldimethyldodecylammonium chloride, benzalkonium chloride; o-phenylphenol, p-phenylphenol, tri Phenol derivatives such as bromophenol and dichlorophen; cupric oxide, cuprous oxide, copper chloride, copper hydroxide, copper sulfate, copper phosphate, copper carbonate, basic copper carbonate, zinc oxide, zinc phosphate, these copper Alternatively, a compound obtained by stabilizing a zinc compound with ammonia or an amine compound, tris-N- (cyclohexyldiazeniumdioxin) -tributyltin or potassium salt, bis- (N-cyclohexyl) diazinium-dioxin copper or aluminum, etc. Metal compounds: Metal soaps that are compounds of organic acids such as naphthenic acid, octanoic acid, 2-ethylhexanoic acid, benzoic acid, oleic acid and copper or zinc; diflubenzuron, novallon, lufenuron, hexaflumuron, flufenoxuron And urea compounds such as chlorofluazuron, nobiflumuron, and teflubenzuron.

A suitable amount of the above-mentioned preservative or insecticide is 1 to 20 kg as the weight of the preservative or insecticide contained in 1 m ³ of the fireproof wood material or fireproof construction material finally obtained, and more preferably 10 g to 5 kg. Moreover, the suitable density | concentration of antiseptic | preservative or insecticide in the fireproofing agent of this invention is 0.1 ppm-20 weight%, More preferably, it is 5 ppm-5 weight%.

Moreover, the following four types of methods are mentioned as a specific manufacturing method for providing such a preservative or insect repellent to the fireproof woody material or fireproof building material of the present invention.
1. A method of impregnating a wood material with a boron-containing aqueous solution used for the fireproofing treatment of the wood material disclosed in the present invention to which a preservative or an insecticide is added.
2. A method of adding a preservative or insect repellent to the coating agent disclosed in the present invention.
3. A method of adding an antiseptic or insect repellent to the adhesive disclosed in the present invention.
(Ie adhesive mixing method).
4). For fireproof woody materials or fireproof building materials obtained by the method disclosed in the present invention,
Finally, a method of impregnating or applying a solution containing a preservative or insect repellent.

  The fire-resistant woody material or fire-resistant building material according to the present invention has high fire-resistant performance, and those produced by bonding have sufficient adhesive strength as a building material, and are effective in antiseptic or insect-proofing properties. Therefore, it can be used for various purposes such as a structural material, an interior material, and an exterior material as a useful wood material or building material that can be used for a long period of time. In addition, since the refractory wood material or the fire-resistant building material of the present invention also has a dimensional stabilization effect due to a large amount of boron-based compounds, cracks that impair the strength of the wood are also suppressed, and the wood The present invention is extremely useful as a processing method that compensates for various drawbacks.

  EXAMPLES Hereinafter, although this invention is demonstrated based on an Example, this Example shows the typical example of this invention, and this invention is not limited to this description content. In addition,% in a present Example means weight%.

  40 kg of orthoboric acid powder and 31.7 kg of anhydrous sodium tetraborate powder were mixed, poured into 228.3 kg of hot water at 80 ° C., and dissolved until a transparent solution was obtained to obtain a clear aqueous solution having a pH of 6.9. The boron element content in the boron-containing aqueous solution thus obtained was 4.6%.

Using this boron-containing aqueous solution, impregnation treatment was performed on a cedar board material having a mouth end surface of 100 mm × 10 mm, a length of 100 mm, and a dry specific gravity of 0.43. Immersion treatment was performed with vacuum for 30 minutes at ^{0.1kg / cm 2, 14kg / cm} 2 charge cell method combines pressure treatment of 60 minutes at the (Bethel method). The impregnated cedar timber was left outside for one month outside where it was not exposed to rainwater and dried to obtain a fire-resistant woody material. The boron content contained in the wood material was calculated to be 31 kg / m ³ from the weight of the impregnated boron-containing aqueous solution. That is, about 7.2 parts by weight of boron was contained with the dry weight of the cedar board before impregnation as 100 parts.

When this refractory material was subjected to a combustion test using a corn calorimeter specified in ISO 5660, it took 15 minutes until the total calorific value reached 8 MJ / m ² , while cracks and holes penetrating to the back surface. The maximum heat generation rate did not exceed 200 kW / m ² continuously for 10 seconds or more, indicating that this material has fire resistance equivalent to that of a semi-incombustible material.

Orthoboric acid powder 44kg and borax the _{(Na 2 B 4 O 7 ·} 10H 2 O) powder 81kg added to water, heated at 60 ° C. with stirring and dissolved to yield a clear aqueous solution of pH 7.2. The boron element content in the boron-containing aqueous solution thus obtained was 5.6%.

  In the impregnation process, the cedar board was operated in the same manner as in Example 1 except that this boron-containing aqueous solution was heated and impregnated at 60 ° C. to obtain a fire-resistant wood material. .

In this refractory material, when a combustion test was performed by the method described in Example 1, the total heat generation amount was 8 MJ / m ² or less in the test time of 20 minutes, and cracks and holes penetrating to the back surface were not recognized. Moreover, since the maximum heat generation rate did not exceed 200 kW / m ² continuously for 10 seconds or more, it was shown that this material has fire resistance equivalent to a non-combustible material.

  Water and 20% aqueous sodium hydroxide solution were added to 80 kg of orthoboric acid powder and stirred to obtain a clear aqueous solution having pH 7.0. The boron element content in the boron-containing aqueous solution thus obtained was 4.7%.

Using this boron-containing aqueous solution, thickness 3mm, length 300mm × width 300mm,
An impregnation treatment was performed on a radialata pine veneer having a water content of 7%. The dipping treatment was performed by subjecting to a reduced pressure treatment at 0.1 kg / cm ^{2 for} 30 minutes in the dipped state, and further performing a pressure treatment at 8 kg / cm ^{2 for} 30 minutes in the dipped state. The impregnated veneer was taken out from the boron-containing aqueous solution and dried at 35 ° C. for 1 week to obtain a fireproof veneer with a moisture content of 7%.

Next, 5 kg of orthoboric acid powder and ₂ kg of borax (Na ₂ B ₄ O ₇ · 10H ₂ O) powder were added to 50 kg of hot water at 70 ° C., dissolved by stirring, and then cooled to room temperature. A clear solution containing a silane coupling agent was obtained by mixing 3 parts by weight of γ-glycidoxypropyltrimethoxysilane and stirring for 10 minutes. This solution was applied to both sides of the adhesive surface in an amount of 250 g / m ² per side of the adhesive surface of the fireproof treated veneer and dried.
Further, 4 kg of phenol resin D-120 manufactured by Oshika Co., Ltd., 0.3 kg of wheat flour, 0.3 kg of calcium carbonate, 0.05 kg of sodium carbonate, and 0.2 kg of water were mixed on this adhesive surface. The phenol resin adhesive obtained in this manner was applied to both sides of the adhesive surface in an amount of 200 g / m ² per side of the adhesive surface, and bonded to form a 9-ply LVL, where 130 ° C., 12 kg / cm ² Adhesion was performed by carrying out hot pressing for 20 minutes under the conditions described above.

  Furthermore, as a control, LVL was produced under the same conditions except that no silane coupling agent solution was used. In these LVLs, when tested in accordance with the Japanese Agricultural Standard for structural veneer laminates (standard of the Article 3 structural veneer laminate “degree of adhesion”), silane coupling agent and phenol resin system The LVL produced using both adhesives showed good adhesion without causing peeling in both the immersion peel test and the boil peel test. However, in the LVL produced using only the control phenol resin adhesive, In the immersion peeling test, lamina peeling was observed at a peeling rate of 13%.

  Further, from the LVL produced using both the silane coupling agent and the phenol resin adhesive obtained here, a test piece having a size of 100 mm × 100 mm was cut out, and the method described in Example 1 was used. When a combustion test was performed at, it was shown that this material has fire resistance equivalent to that of a non-combustible material.

  After mixing 100 parts by weight of the isocyanate adhesive PI bond TP-111 manufactured by Oshika Co., Ltd., 15 parts by weight of the curing agent H-3M, and 3 parts by weight of γ-glycidoxypropyltrimethoxysilane, the mixture is stirred for 5 minutes. Then, a mixed adhesive of an isocyanate adhesive and a silane coupling agent was prepared.

Next, this mixed adhesive was applied to both sides of the adhesive surface in an amount of 200 g / m ² per side of the adhesive surface of the fireproof veneer obtained by the method described in Example 3, and bonded to 9 ply. The LVL was constructed and bonded by applying a pressure of 10 kg / cm ² for 50 minutes to obtain a fire-resistant LVL.

  Furthermore, as a control, LVL was produced under the same conditions except that no silane coupling agent solution was used. In these LVLs, the same immersion peel test and boiling peel test as in Example 3 were performed. The LVL produced using both the silane coupling agent and the isocyanate-based adhesive was subjected to the immersion peel test and the boiling peel test. Although peeling did not occur in both cases, good adhesion was shown. However, in the LVL produced using only the control isocyanate-based adhesive, peeling of lamina was observed at a peeling rate of 25% in the immersion peeling test.

  Moreover, from the LVL produced using both the silane coupling agent and the isocyanate-based adhesive obtained here, a test piece was cut out with a size of 100 mm × 100 mm, and using this, the method described in Example 1 was used. When a combustion test was performed, it was shown that this material has fire resistance equivalent to that of a non-combustible material.

In the boron-containing aqueous solution described in Example 3, a solution obtained by dissolving cyproconazole at 50 ppm and acetamiprid at a concentration of 50 ppm was used as a treatment solution, and the thickness was 2.5 mm, length 300 mm × width 300 mm, water content 10%. An impregnation treatment was performed on the lauan single plate. The dipping treatment was carried out by subjecting to a reduced pressure treatment at 0.1 kg / cm ^{2 for} 20 minutes in the dipped state and further a pressure treatment at 10 kg / cm ^{2 for} 20 minutes in the dipped state. The impregnated veneer was taken out from the treatment solution and dried at 35 ° C. for 1 week to obtain a fireproof veneer with a moisture content of 8%.

Next, a solution prepared by mixing 95 parts by weight of methylene chloride with 5 parts by weight of γ-aminopropyltrimethoxysilane was applied to both sides of the adhesive surface in an amount of 200 g / m ² per side of the adhesive surface of the above fireproof veneer. It was applied and dried. Furthermore, the phenolic resin-based adhesive described in Example 3 was applied to both sides of the adhesive surface in an amount of 200 g / m ² per side of the adhesive surface to form a 9-ply plywood. Adhesion was performed by performing hot pressing for 20 minutes at 130 ° C. and 12 kg / cm ² .

  The fireproof plywood obtained in this way is installed in a pine forest inhabited by termites in Kagoshima Prefecture, with the plywood embedded perpendicular to the ground, with only the upper 5 cm of the plywood protruding above the ground, When left in an environment exposed to rainwater and sunlight for one year, the plywood was taken out and the condition was observed. As a result, it was not damaged by termites, and no decay was observed. It was shown that the building material has an excellent protective effect.

A 9-ply LVL was constructed using a phenolic resin-based adhesive described in Example 3 for a 3 mm thick, 300 mm long x 300 mm wide, radialitapine single plate having a water content of 7%. Bonding was performed by performing hot pressing for 20 minutes under the condition of 12 kg / cm ² .
A test piece having a size of 100 mm × 100 mm was cut out from a normal LVL that was not treated with the boron-based compound thus obtained, and this test piece was used as a control. The refractory material (cedar plate material) described in Example 2 was cut out in a size of 100 mm × 100 mm from the LVL produced using both the silane coupling agent and the isocyanate-based adhesive described in Example 4. A comparative test of the wood protective effect of the test piece was performed. A comparative test was conducted in a pine forest inhabited by termites in Kagoshima Prefecture by placing the test piece on the ground and exposing it to rainwater and sunlight for 6 months.

  As a result, the control specimen was severely damaged by termites, and the dry weight of the specimen was reduced by 12%. However, all the test pieces treated with boron-based compounds are not damaged by termites, and there are no phenomena associated with dimensional changes such as cracking and warping, which indicates that they are excellent in terms of dimensional stability. It was done.

  In addition, these exposed test pieces were dried while ventilating at 40 ° C. for 4 weeks, and the dry weight was measured. As a result, the test piece derived from Example 1 was 75%, and the test piece derived from Example 2 was used. 71%, 92% of the boron compound remains in the test piece derived from Example 4, and the wood material of the present invention retains the boron compound well even in an environment exposed to rainwater. It has been shown.

  Moreover, when the combustion test was performed by the method of Example 1 using the test piece after these exposure, the test piece derived from Example 1 was flame-retardant, the test piece derived from Example 2 was semi-incombustible, and implemented. The test piece derived from Example 4 was determined to be nonflammable, indicating that the wood material of the present invention maintained good fire resistance.

A solution prepared by mixing 95 parts by weight of methylene chloride with 5 parts by weight of γ-aminopropyltrimethoxysilane was added to the surface of a fire-resistant wood material (cedar board) manufactured by the method described in Example 2 at 160 g / m ^2. Was applied and dried. Further, a water dispersible polyisocyanate curing agent BURNOCK (Burnock) DNW-5000 manufactured by Dainippon Ink & Chemicals, Inc. was diluted twice with water, applied in an amount of 250 / m ² and dried.

  The painted fire-resistant wood material thus obtained was exposed outdoors in the same manner as in Example 6. Using the test piece after this exposure, a combustion test was performed by the method described in Example 1. It was judged that the woody material of the present invention maintained good fire resistance.

A 50 mm × 50 mm cowhide having a thickness of about 1.5 mm was dried at 40 ° C. for 6 hours and then immersed in a boron-containing aqueous solution described in Example 2 for 5 minutes to obtain a fire-resistant leather.
When this treated product was thrown into the flame of a household gas stove for 30 seconds, shrinkage due to drying occurred, but no ignition was observed. As a control, the same test was performed on untreated leather, which ignited the leather in 3 seconds.

Claims (11)

  A fire-resistant wood material characterized by impregnating a wood material with a boron-containing aqueous solution having a boron element content of 3 wt% to 8 wt% and a pH adjusted to 6 to 8, and then drying the wood material Manufacturing method.   The method for producing a refractory wood material according to claim 1, wherein the wood material is impregnated while being heated so that the temperature of the boron-containing aqueous solution is 50 ° C or higher.   A method for producing a refractory wood material, further comprising applying a silane coupling agent and a resin-based paint to the refractory wood material obtained by the method according to claim 1 or 2.   When applying a silane coupling agent and a resin-based paint, apply a silane coupling agent and then a resin-based paint, or apply a mixture of a silane coupling agent and a resin-based paint. The manufacturing method of the refractory wood material of Claim 3.   The method for producing a refractory wood material according to claim 3 or 4, wherein the resin-based paint is a paint selected from the group consisting of isocyanate, urethane, and acrylic.   A fireproof wood material obtained by the method according to any one of claims 1 to 5, further comprising applying a silane coupling agent and a resin adhesive to bond the fireproof wood material. Manufacturing method for building materials.   When applying the silane coupling agent and the resin adhesive, apply the silane coupling agent and then the resin adhesive, or apply a mixture of the silane coupling agent and the resin adhesive. The manufacturing method of the fire-resistant building material of Claim 6 characterized by the above-mentioned.   Adhesive selected from the group consisting of a phenolic resin, a resorcinol resin, an isocyanate resin, a melamine resin, a urea resin, a melamine-urea resin, a urethane resin, an epoxy resin, and an acrylic resin. The method for producing a fireproof building material according to claim 6 or 7, wherein the method is a chemical agent.   A fire-resistant wooden material or a fire-resistant building material obtained by the method according to any one of claims 1 to 8.   The fire-resistant wood material or fire-resistant building according to claim 9, wherein the dry weight of the wood material before impregnating the boron-containing aqueous solution is 100 parts by weight, and 2 parts by weight or more of boron element is contained. Wood. In the refractory wood material or the refractory building material according to any one of claims 1 to 8, and the manufacturing method thereof, the content of boron element is 5 wt% or more and 8 wt% or less, and Na (sodium) or A fireproofing agent characterized by being an aqueous solution having a pH adjusted to 6 to 8 with a compound containing K (potassium).