JPH11349950A - Composition for thin-filmy flameproof clear coat for woody material and woody material treated with flameproof clear coat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject composition capable of exhibiting excellent safety and flame proof characteristics, while keeping advantages of the woody material it coats, and useful for, e.g. construction materials by including a nonhalogen-based organic polymer and hydrophobic organic solvent as the major ingredients, and also by limiting thickness of its film over the woody base and depth of its penetration into the base to specific ranges. SOLUTION: This composition for thin-film, flame proof clear coats is composed of, as the major ingredients, (A) a nonhalogen-based organic polymer [e.g. solid or liquid hydrocarbon resin, alkyd resin or (semi)drying oil, having a softening temperature of 60 to 180 deg.C, the liquid component therefor as the stock solution having a number- average molecular weight of 2,500 to 10,000] and (B) a hydrophobic organic solvent (e.g. kerosene, toluene, ethyl acetate, methyl ethyl ketone or butanol), and is spread over a woody base in such a way to have a film of 40 μm or less in average thickness thereon and to penetrate into the base to an average depth of 50 μm or more from the surface. The preferable component A/component B wt. ratio for the composition is (8/92) to (40/60).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for imparting flame resistance to a wood material while preserving the following advantages of a normal wood material. )
A surface treatment composition capable of applying a thin-film flame-resistant clear coat to a wood material without adding or coating the same, and a thin-film flame-resistant clear coat made of the surface-treatment composition formed on the surface of the wooden material. About materials. Here, the advantages of ordinary woody materials include, for example, a function of preserving the aesthetics of wood grain, the mild color of woody wood, the unique fragrance, temperature control and humidity control.

More specifically, the present invention mainly comprises a non-halogenated organic polymer and a hydrophobic organic solvent, and if necessary, inorganic ultrafine particles (inorganic ultrafine particles), a coloring pigment, a preservative, a fungicide, A thin-film flameproof clearcoat composition to which an insecticide and / or a flameproofing agent can be further added, a wood material provided with a thin-film flameproof clearcoat with the surface treatment composition, and a wood material produced from the wood material, for example. The present invention relates to a structural module of a wooden building, for example, an indoor / outdoor door, a panel, a wet edge, a roof shingle, a board fence as an accessory, a gable and a gate, a tea house and a tea house.

[0003]

2. Description of the Related Art In order to achieve sufficient flameproofing and sustainability in the prior art, most of the above advantages of wood are unavoidably sacrificed. Seen in cases.

[0004] The flame-retardant (flame-retardant) coatings conventionally used are very diverse. Some of them include a halogen-based flame retardant (flame retardant), a phosphorus-based flame retardant and / or an amino compound-based flame retardant as a main component in the paint; A flame retardant formulation that combines carbon powder with a base material that releases moisture when exposed to high heat or flame, such as hydrates of metal oxides; yet another is a flame retardant coating that coats when exposed to high heat or flame The foaming component contained therein expands to several times the initial volume of the coating due to decomposition or the like;
And the like.

[0005] However, a flame retardant formulation in which a flame retardant is often added to a paint in order to develop and maintain an expected level of flame retardancy requires adding a considerably large amount of a flame retardant component. is necessary. Moreover, it is a problem that this formulation is not always sufficient for the intended purpose as a result of generating various toxic gases when exposed to high heat or flame. In addition, it is extremely difficult to impart sufficient flameproofing ability to a thin film clear coat using only this formulation.

[0006] However, among the above-mentioned formulations, there has been proposed a formulation "exposed to high heat or flame such as metal hydroxides and metal oxide hydrates" which has been proposed as a formulation for fundamentally eliminating the generation of toxic gases and the like. Combining carbon powder with the main ingredient that releases moisture when performed "also requires kneading in a very large amount into the base resin to exhibit the desired level of flame resistance. Moreover, when this formulation is applied in the form of a thin film on the surface of a molded article, there remains a problem in its film forming ability. Therefore, it is extremely desired to impart sufficient flame resistance to the thin film clear coat.

[0007] In the last formulation for adding an ignition foaming component, the desired level of heat-blocking property is obtained only by adding a considerably large amount of the foaming component. Therefore, it can be said that with this formulation, it is extremely difficult to impart sufficient flame resistance to the thin film clear coat even in the unfoamed stage.

[0008] In any of the above-mentioned formulations, there is no disclosure or intention of a formulation which imparts sufficient flame resistance to the thin film clear coat which is the object of the present invention.

[0009]

SUMMARY OF THE INVENTION In view of the above-mentioned need for improvement in the prior art, the present inventor has formed on the surface of a base material while preserving the following advantages of ordinary wood materials. In addition to developing a formulation that can provide sufficient flameproofing without using a special flameproofing agent in the clear coat of the thin film to be formed, the formulation is extremely easy to use, and the basic formulation involves the generation of toxic gas etc. The present invention has been completed as a result of the development with the main object of being difficult.

The feature of the flameproofing formulation of the present invention is contrary to the common belief of the conventional flameproofing formulation that it is desirable to coat the substrate surface as thickly and completely as possible. The coating has been completed based on the finding that thinner coatings are preferred.

Further, the object of the present invention is to provide a basic concept of "a measure for minimizing sacrifices of the advantages of the wood material as much as possible in order to make full use of the advantages thereof. Turned to development.

[0012] The present invention is a combination of the following components,
An object of the present invention is to surely exert the effects of the present invention: (1) It is mainly composed of a non-halogen organic polymer and a hydrophobic organic solvent, and has a clear layer having an average layer thickness of 40 μm or less on the surface of a wooden material. A composition for a thin-film flame-resistant clear coat that forms a coat and penetrates inward from the surface of wood material to an average depth of 50 μm or more. (2) The non-halogen organic polymer is a low molecular weight polymer, and is a solid hydrocarbon resin, a liquid hydrocarbon resin, an alkyd resin, a urethane resin, an epoxy resin, a phenol resin, an acrylic resin, a natural wax, Item 2. The composition for a thin-film flameproof clearcoat according to Item 1, which is one or more low molecular weight substances selected from a hydrocarbon wax, a drying oil, and a semidrying oil. (3) Among the non-halogenated organic polymers, the solid component has a softening point of 60 to 180 ° C. by a ring and ball method, and the liquid component has a number average molecular weight of 2.5 × 1 in a neat liquid state.
The composition for a thin-film flame-resistant clear coat according to claim 1 or 2, wherein the composition is from 0 ² to 1 × 10 ⁴ . (4) The hydrophobic organic solvent is a hydrocarbon solvent, and is at least one selected from aliphatic solvents such as kerosene, light oil, petroleum benzine, and aromatic solvents such as benzene, toluene, xylene and ethylbenzene, or ester solvents. A solvent, ethyl acetate, butyl acetate, one or more selected from ethyl butyrate and amyl butyrate, a ketone-based solvent, one or more selected from methyl ethyl ketone and methyl isobutyl ketone, or an alcohol-based solvent, Item 4. The composition for a thin-film flameproof clear coat according to any one of Items 1 to 3, which is at least one selected from n-, i-, sec- or tert-butanol and 2-ethylhexanol. (5) Item 1 wherein the weight ratio of the non-halogen organic polymer to the hydrophobic organic solvent is former / latter = 8/92 to 40/60.
5. The composition for a thin-film flameproof clear coat according to any one of items 1 to 4. (6) In a thin-film flame-resistant clear coat composition of a wood material mainly composed of a non-halogen organic polymer and a hydrophobic organic solvent, the solid component in the non-halogen organic polymer is softened by a ring and ball method. In addition to showing a point 70-170 ° C., the liquid component of the polymer is
Solid hydrocarbon resin, liquid hydrocarbon resin, alkyd resin, urethane resin, epoxy resin, phenol resin having a number average molecular weight of 5 × 10 ^{2 to} 5 × 10 ³ (measurement methods, measurement conditions and formulas will be described later) At least one low molecular weight substance selected from acrylic resins, natural waxes, hydrocarbon waxes, drying oils and semi-drying oils, wherein the hydrophobic organic solvent is a hydrocarbon solvent, and kerosene, light oil, petroleum Benzine,
One or more selected from benzene, toluene, xylene and ethylbenzene or an ester solvent, one or more selected from ethyl acetate, butyl acetate, ethyl butyrate and amyl butyrate, a ketone solvent, methyl ethyl ketone and methyl isobutyl At least one selected from ketones, or one or more alcohol-based solvents selected from n-, i-, sec- or tert-butanol and 2-ethylhexanol, and the non-halogenated organic polymer / The weight ratio of the hydrophobic organic solvent is the former / the latter = 8/9
Item 6. The composition for a thin-film flameproof clear coat according to any one of Items 1 to 5, which has a ratio of 2 to 40/60. (7) In addition, the inorganic ultrafine particles have a fine particle size such that the grain of the base material can be visually recognized from the outside of the clear coat formed of the thin film flameproofing composition, and are 200% by weight based on the weight of the non-halogen organic polymer. %. The composition for a thin-film flame-resistant clear coat according to any one of the above items 1 to 6 contained in an amount of not more than 10%. (8) The thin film flame retardant according to the above item 7, wherein the inorganic ultrafine particles are at least one selected from silicon oxide, metal silicate, metal borosilicate, zinc sulfide, titanium oxide, zinc oxide and calcium carbonate. Composition for clear coat. (9) The above item 1 which further contains not more than 200% by weight, based on the weight of the non-halogen organic polymer, of a flame retardant which is soluble in an organic solvent or can be stably dispersed in the organic solvent.
9. The composition for a thin-film flameproof clear coat according to any one of 8. (10) The thin-film flameproofing according to the above item 9, wherein the flameproofing agent is at least one selected from a phosphorus-based organic compound, a phosphorus-based halogenated organic compound, a phosphorus-nitrogen-based organic polymer, and a phosphate-based compound. Composition for water-soluble clear coat (11) A thin-film flame-retardant composition of a wood material mainly composed of a non-halogen organic polymer and a hydrophobic organic solvent forms a clear coat with an average layer thickness of 0 to 40 μm or less on the surface of the wood material, Item 11. The thin-film flame-resistant clearcoat-treated wood material according to any one of Items 1 to 10, which has permeated inward at an average depth of 50 µm or more from the surface. (12) A wooden structure in which the treatment using the thin film flameproofing composition forms a clear coat having an average layer thickness of 40 μm or less on the surface of the wooden material and penetrates 50 μm or more inward from the surface of the wooden material on the average. Building component modules, for example, indoor and outdoor doors,
Paneling, wet edges, roofing panels, accessories such as sheet walls, gables and gates, and a thin-film flame-resistant clear coat treatment according to any one of the above items 1 to 11, selected from the group consisting of tea ceremony and Shia (Tei). Building components.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS <Non-halogen organic polymer (A)
> The non-halogen organic polymer which is a flame retardant (flame retardant) main agent in the present invention is a low molecular weight polymer, and is a solid hydrocarbon resin, a liquid hydrocarbon resin, an alkyd resin, a urethane resin, a curing agent. Non-epoxy resin (epoxy prepolymer; phenoxy resin), phenolic resin, acrylic resin,
One or more low molecular weight compounds selected from natural waxes, hydrocarbon waxes, drying oils and semi-drying oils.

Examples of the solid hydrocarbon resin (solid hydrocarbon resin) (A1) include those sold as petroleum resins. The petroleum resins are roughly classified into aromatic petroleum resins, alicyclic petroleum resins, and aliphatic petroleum resins. The aromatic petroleum resin is a high-boiling fraction having a boiling point range of 140 to 280 ° C. remaining after a useful fraction for petrochemicals is extracted from a mixed oil obtained by pyrolyzing naphtha, which is frequently used as a petrochemical raw material. Thus, the main components for petroleum resin raw materials are considered to be indene, α-methylstyrene, vinyltoluene and the like.

The alicyclic petroleum resin is usually produced by hydrogenating an aromatic ring (aromatic nucleus) of the aromatic petroleum resin.
Aliphatic hydrocarbon resin is usually a conjugated diene fraction 1,
It is a low polymer obtained by copolymerizing one or more of 3-butadiene, isoprene and piperylene with a cyclopentadiene compound using a Friedel-Crafts catalyst.

The liquid hydrocarbon resin is a hydrocarbon polymer having a lower molecular weight than the solid hydrocarbon resin described above, and is mainly a copolymer of an aliphatic hydrocarbon. However, it shows a considerably high viscosity.

<< Other non-halogen organic polymer (A
2) >> The alkyd resin that can be used as the non-halogen organic polymer in the present invention is a synthetic resin obtained by a condensation reaction between a polyhydric alcohol and a polycarboxylic acid (polybasic acid). 1) An invertible alkyd resin is a condensate of a dicarboxylic acid and a diol or a product obtained by modifying it with a non-drying oil is permanently soluble and fusible; 2) Invertable alkyd The resin is a condensate of a dicarboxylic acid and a triol or higher (trivalent or higher) alcohol.The initial condensate is soluble and fusible, but when further heated, a cross-linking reaction occurs to make it infusible and insoluble. It turns into a gel (thermal conversion). Further, when an unsaturated group such as a drying oil fatty acid is contained in a part of the molecule, it binds to oxygen and is converted into an infusible and insoluble stage (oxygen conversion).

The compositional classification of alkyd resins can be broadly classified into the following two types: a) pure alkyd resins (condensates of polyols and polycarboxylic acids only); b) modified alkyd resins (as modifiers) Modified products using fatty oils, natural resins or synthetic resins).

In practical use, the polycarboxylic acid (polybasic acid) is a saturated polybasic acid such as phthalic anhydride, terephthalic acid, succinic acid (succinic acid), adipic acid or sebacic acid; Polybasic acid maleic acid, maleic anhydride, fumaric acid, itaconic acid or citraconic anhydride; to the polyhydric alcohol (polyol) side glycol-based ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol,
Trimethylene glycol or tetramethylene glycol; trihydric alcohol (triol) -based glycerol (glycerin) or trimethylolpropane; tetrahydric alcohol or higher diglycerol, triglycerol, pentaerythritol (pentaerythritol), dipentaerythritol, mannitol ( Mannitol) or sorbitol (sorbit).

As a modifying agent for obtaining a modified alkyd resin, fats and oils and oil fatty acids are soybean oil, linseed oil, tung oil,
Castor oil, coconut oil and their fatty acids stearic acid, oleic acid, linoleic acid, linoleic acid, eleostearic acid, ricinoleic acid or dehydrated ricinoleic acid;
Natural resin is rosin, copal, amber (amber), shellac
(Shellac): Ester gum, phenol resin, urea resin and melamine resin are used as synthetic resins. Preferred among the above alkyd resins are:
Modified alkyd resins, particularly modified alkyd resins using linseed oil, eno oil or tung oil (tung oil) as drying oil as a denaturing agent.

The urethane resin (polyurethane; PU) which can be used as the non-halogen organic polymer in the present invention can be roughly classified into polyether polyurethane and polyester polyurethane. The former is a reaction product of a diisocyanate compound, typically a tolylene diisocyanate and a compound containing a large number of ether bonds (polyether), for example, polyoxypropylene glycol, polyoxypropylene-polyoxyethylene glycol, The latter is a reaction product of an isocyanate compound and a polyester such as adipic acid / ethylene glycol condensate.

The uncured epoxy resin (epoxy prepolymer) which can be used as the non-halogenated organic polymer in the present invention is an uncured epoxy resin which is a raw material before being cured with a curing agent. Therefore, any organic compound that contains one or more epoxy groups in the molecule and is solid or liquid at room temperature and soluble in an organic solvent can be included in the uncured epoxy resin of the present invention. However, in general, an aromatic compound containing one or more epoxy groups obtained by reacting these lower epoxy compounds once with a polyhydric phenol rather than a method of highly polymerizing only epichlorohydrin or propylene oxide as a monomer is generally used. The compound corresponds to the prepolymer. Here, preferred polyhydric phenols for the purpose of the present invention are monohydric phenols or dihydric phenols.

Examples of those frequently used as polyhydric phenols include bis (4-oxyphenyl) methane (bisphenol F) and 2,2-bis (4-oxyphenyl) propane (bisphenol A). For special brands, 1,1-bis (4-oxyphenyl) ethane and 2,2-bis (4-
(Oxyphenyl) butane or 2,2-bis (4-oxyphenyl) pentane or the like can be used.

Among the reaction products of the above epoxy compounds and oxyphenylalkanes or bis (oxyphenyl) alkanes, mono (epoxyalkyloxy) phenylalkane and bis (epoxyalkyloxy) phenylalkane, that is, when the epoxy group is an oxygen Those having one or two bonds to the aromatic nucleus via an atom are preferably selected from the viewpoint of solubility and solubility in an organic solvent.

Since epoxyalkyloxyphenylalkanes of tris (epoxyalkyloxy) or higher show a tendency to form a network-like polymer, it is limited to about 10 mol% or less in the non-halogenated organic polymer of the present invention. Can be mixed. At this level, there is little concern that the composition for a thin-film flame-resistant clear coat obtained will naturally change to an insoluble or infusible substance before it is applied to the wood.

Preferred uncured raw materials among the above are, for example, monoglycidyloxybenzene, monoglycidyloxytoluene, bis (glycidyloxy) benzene, bis (glycidyloxy) benzene,
(Glycidyloxy) toluene and the like.

The phenolic tree which can be used as a non-halogen organic polymer in the present invention is roughly classified into the following resols and novolaks: ◆ Resole: reacts phenols and aldehydes in the presence of an alkaline catalyst. As a precondensate obtained by the reaction, resol which is a soluble substance rich in oxymethylene bonds is obtained. This is a mixture of phenols containing many methylol groups and diphenylmethane containing many methylol groups.

When ammonia is used as the alkali catalyst, an intermediate called ammonia resol is obtained. This intermediate -CH ₂ NH ₂ and -CH ₂ -NH-C
It contains nitrogen-containing groups such as H _2- . Novolak: A soluble and fusible resin obtained by reacting phenols with formaldehyde with an acid catalyst, wherein phenol is linearly linked mainly by methylene bonds.

As one of the above-mentioned phenolic resins, a phenolic resin for paint is obtained by reacting p-alkylphenol or p-arylphenol with formaldehyde as a phenol, and is oil-soluble. Alternatively, the novolak is dispersed in a natural fat or oil such as rosin, copal or rosin ester or a processed product thereof, or the drying oil is included in the novolak.
(Oil-modified phenolic resin).

The acrylic resin that can be used as the non-halogen organic polymer in the present invention is a general term for acrylic acid and its polymer. That is, the concept encompasses polymers and copolymers of monomers such as acrylic acid, acrylic acid ester, acrylamide, acrylonitrile, methacrylic acid, and methacrylic acid ester. Among them, in many cases, it is used to mean polymethacrylic acid ester. Acrylic acid and methacrylic acid may be collectively referred to as “(meth) acrylic acid”. ◆ Acrylic resin varnish: Those using a (meth) acrylate polymer as a varnish have a low degree of polymerization (average degree of polymerization: 200 to 400). Commonly used copolymers include methyl methacrylate (MMA) and vinyl acetate (VA). This copolymer is colorless and transparent and gives good color when used as an enamel. Moreover,
Excellent in water resistance, moisture resistance, acid resistance and alkali resistance.

Preferred among the above acrylic resins are the following: Natural waxes (natural waxes) that can be used as the non-halogen organic polymer in the present invention include:
Without being limited to the strict meaning, it includes oily natural products that are solid at around normal temperature. Among these, vegetable waxes, such as carnauba wax and cotton wax, and animal waxes, such as
Examples include beeswax and wool wax. In addition, there are wood wax and montan wax.

In any case, the natural wax is soluble in alcohol, chloroform and the like. The synthetic wax (wax) that can be used as the non-halogen organic polymer in the present invention is mainly a hydrocarbon wax. Hydrocarbon waxes can also be generally referred to as petroleum waxes. Petroleum is classified into paraffin wax, microcrystalline wax (microcrystalline wax) and petrolatum depending on the (production) refining route and properties of petroleum.

Among the above-mentioned synthetic waxes, preferred are polyethylene wax, polypropylene wax (amorphous or atactic polypropylene), polyethylene wax, polyethylene wax maleic anhydride (maleic anhydride graft), polypropylene It is a polyolefin wax such as a maleic anhydride anhydride or a modified polyolefin wax (oxide, unsaturated acid anhydride graft product).

Examples of the drying oil, semi-dry oil, boil oil and non-drying oil which can be used as the non-halogen organic polymer in the present invention include the following: ◆ Drying oil: thin film and left in air Then, it refers to oils that solidify naturally in a relatively short time and have an iodine value of 130 or more. Typical examples of the drying oil include linseed oil, eno oil and tung oil (tung oil; touyu), hemp seed oil and sardine oil (sardine oil). ◆ Boil oil: An improved drying property of drying oil. The above-mentioned drying oil is imparted with appropriate consistency by heating under air blowing, and is subjected to decolorization treatment and heat treatment by adding a desiccant. It has been subjected. ◆ Semi-dry oil: Although the drying property is inferior to the drying oil, it still has a certain degree of drying property and has an iodine value of 100.
To less than 130. Semi-dry oils include, for example, sesame oil, rapeseed oil, cottonseed oil and soybean oil. ◆ Non-drying oil: It is the hardest to dry and has an iodine value of less than 100. Examples of the non-drying oil include camellia oil (camellia oil), olive oil, castor oil and the like.

Among the above-mentioned drying oils, boiled oils, semi-drying oils or non-drying oils, the following are preferred:
Semi-dry oils and / or dry oils are preferred because of the properties of the coating film and the need to quickly solidify (dry) in air.

<Physical Properties of Organic Polymer> In the case of a solid substance in a non-halogen organic polymer, it is almost possible to select a softening point of 60 to 180 ° C., preferably 80 to 150 ° C. by a ring and ball method. Is sufficient for the purpose of

When the non-halogenated organic polymer is a liquid, the number average molecular weight of the liquid polymer is from 2.5 × 10 ² to 1 in the undiluted state instead of the ring-ball softening point.
Choosing a size of × 10 ⁴ , preferably 5 × 10 ^{2 to} 5 × 10 ³ is sufficient for most purposes.

However, since the above-mentioned reduced viscosity (ηred) is usually measured using a different solvent depending on the type of the polymer, it is calculated from the viscosity measured at 135 ° C. in a xylene solvent, for example. The reduced viscosity (ηred) can be, but is not limited to.

Nevertheless, for the purpose of defining the range, it is desirable that other types of measurement objects be measured at the same temperature using the same type of solvent as much as possible. Therefore, the case where the measurement is performed using the optimum solvent for the specific polymer only when it is unavoidable is included.

The above number average molecular weight is an average molecular weight measured by a measurement method called gel permeation chromatography (abbreviation "GPC"). Where GPC
In general, a porous gel swollen in a specific measurement solvent is packed in a separation column, and a solution of the polymer to be measured is passed through the separation column, and as a function of the position of the column, The fractionated spectrum is measured, and the result is a value calculated by a predetermined calculation formula.

<Hydrophobic Organic Solvent (H)> Hydrophobic Organic Solvent
(H) is a non-halogen type, a hydrocarbon solvent, one or more selected from kerosene, light oil, petroleum benzene, benzene, toluene, a mixture of xylene isomers and ethylbenzene, or an ester solvent, Ethyl, butyl acetate, one or more selected from ethyl butyrate and amyl butyrate, a ketone solvent, one or more selected from methyl ethyl ketone and methyl isobutyl ketone, or an alcohol solvent, n-, i-, At least one selected from sec- or tert-butanol and 2-ethylhexanol.

It is important that the type of the hydrophobic organic solvent is appropriately selected according to the type of the non-halogenated organic polymer. In some cases, it is important to reflect the working conditions and use conditions in the selection. possible. For example, when the non-halogenated organic polymer is aromatic, it is advantageous in terms of dissolving ability to select the hydrophobic organic solvent from aromatic ones.

<Quantity ratio of non-halogen organic polymer to hydrophobic organic solvent> The weight ratio of the non-halogen organic polymer to the hydrophobic organic solvent constituting the thin film flameproofing composition of the present invention is usually Former / latter = 8 / 92-40 / 60, preferably 1
By setting the ratio to 5/85 to 30/70, the object of the invention can be sufficiently achieved in most cases.

<Inorganic Ultrafine Particles (E)> The composition for a thin film flameproofing clear coat of the present invention further comprises inorganic ultrafine particles (E) formed from the outside of the clearcoat formed of the thin film flameproofing composition. It may have a fine particle size such that the grain of wood is visible, and may contain up to 200% by weight, preferably up to 140% by weight, more preferably up to 70% by weight, based on the weight of the non-halogenated organic polymer.

Examples of the inorganic ultrafine particles include silicon oxide, metal silicate (usually silicate glass), metal borosilicate (usually heat-resistant silicate glass), zinc sulfide, barium sulfate, titanium oxide or calcium carbonate, One or more selected from zinc can be mentioned.

The average particle diameter of the inorganic ultrafine particles is usually 0.01.
~ 3 μm, preferably 0.05 to 1 μm,
Enough for most purposes. <Flame Retardant (Flame Retardant) (F)> The composition for a thin film flame retardant clear coat of the present invention itself has sufficient flame retardancy to the extent normally required. Certain flame retardants which are soluble in organic solvents or can be stably dispersed in organic solvents are contained in an amount of 200% by weight or less, preferably 100% by weight, based on the weight of the non-halogenated organic polymer. obtain.

The color of the flame retardant (F) is colorless or pale,
It is important to be one that can be easily dissolved or dispersed in an organic solvent and does not affect the color of the surface of the coated object as much as possible, in addition to the flameproofing ability.

Preferred examples of the flame retardant (F) include the following: at least one selected from phosphate ester compounds, phosphorus organic compounds, and phosphorus halide organic compounds. Examples of the phosphate compound include triphenyl phosphate, tricresyl phosphate, cresyl phenyl phosphate, resorcinol-bis (diphenyl phosphate), 2-ethylhexyl diphenyl phosphate, dimethyl phosphate and triaryl phosphate. Examples of the phosphoric acid-halogen-containing ester include tris (chloroethyl) phosphate, tris (dichloropropyl) phosphate, tris (β-chloropropyl) phosphate, tris (tribromophenyl) phosphate, tris (dibromophenyl) phosphate, and tris (tripromo. Neopentyl) phosphate and diethyl-N, N-bis (2-hydroxyethyl) aminomethylphosphate.

<Dispersant (G)> The role of the dispersant (G) is to uniformly disperse various additives in the composition and in a molded article (including test pieces and the like) obtained therefrom. Above all, the dispersant (G) functions to prevent the effect of the flame retardant from being localized by uniformly dispersing the flame retardant (F) in the composition and the molded article obtained therefrom. .

Examples of the dispersant (G) include ethylene glycol monoalkyl ethers and ethylene glycol monoaryl ethers, and mixed glycol ethers containing at least one of them as a main component. In addition, the above "ethylene glycol"
Is not limited to a monomer, for example, a dimer thereof,
Diethylene glycol or trimer triethylene glycol may be used.The "alkyl group" constituting the "alkyl ether" is not limited to an alkyl group having a narrow meaning belonging to a saturated aliphatic group, and an alkenyl group belonging to an unsaturated aliphatic group such as aryl ( an `` aryl '' group is not limited to a phenyl group, but may be an aryl group in which the hydrogen atom bonded to the aromatic nucleus is replaced by another substituent such as an alkyl group, an alkenyl group or an alkylene group. For example, it may be a benzyl group or the like.

Specific names of the compounds included in the above definition include ethylene glycol monohexyl ether (He
G) [Trade name: Hexyl glycol], Diethylene glycol monohexyl ether (HeDG) [Trade name: Hexyl diglycol], Ethylene glycol mono (2-ethylhexyl) ether (EHG) [Trade name: 2-ethylhexyl glycol], Diethylene glycol mono (2-ethylhexyl) ether (EHDG) [trade name: 2-ethylhexyl diglycol], ethylene glycol monoallyl ether (AG) [trade name: allyl glycol], mixed glycol ether mainly composed of ethylene glycol monoallyl ether (AG -H)
[Product name: allyl glycol H], ethylene glycol monophenyl ether (PhG) [Product name: phenyl glycol], ethylene glycol monophenyl ether (PhG-H)
Mainly mixed glycol ether [trade name: phenyl glycol H], ethylene glycol monobenzyl ether
(BzG) [trade name: benzyl glycol] and diethylene glycol monobenzyl ether (BzDG) [trade name: phenyldiglycol].

Among the above glycol ethers, those preferred for the purpose of the present invention are ethylene glycol mono (2-ethylhexyl) ether (trade name: 2-ethylhexyl glycol) and diethylene glycol mono (2-ethylhexyl) ether [trade name] : 2-ethylhexyl diglycol]. These may of course be used alone or as a mixture of both.

<Thin-Film-Treated Wood Products> The thin-film fire-resistant clear-coated wood material of the present invention has a thin-film flame-proof material whose surface layer is mainly composed of a mixed system of a non-halogen organic polymer and a hydrophobic organic solvent. Coated with an average layer thickness of 40 μm or less, preferably 0 to 30 μm.

It is recognized that the flameproof clearcoat treated wood material of the present invention has a thin flameproof clearcoat treated layer covering its surface layer. That is, in the case of a normal flameproofing material, improvement in its flameproofing property (flameproofing ability) is recognized as the flameproofing layer becomes thicker. Therefore, in the conventional flameproofing treatment, improvement has been directed in the direction of how to form a thick flameproof layer. Indeed, it would easily be expected that the greater the thickness of the flameproof layer, the greater the fireproofing capacity exerted.

However, in the thin-film flame-resistant clear coat treated wood which is the object of the present invention, thickening the flame-resistant clear coat layer rather lowers the flame resistance. The reason is that the flameproofing composition of the present invention is required to penetrate into the woody layer from the surface of the material to be coated and exhibit a flameproofing effect. That is, the clear coat layer is unnecessary for the purpose of flame prevention only. However, the clear coat layer can be expected to have functions of surface protection and appearance decoration in addition to imparting flame resistance.

Therefore, according to the conventional concept, a maximum of 40 μm
It was quite natural that it was thought that it would be extremely difficult to impart flame resistance to a thin film clear coat limited to this layer thickness.

However, the present inventor has found that in the field of thin film clear coats which seem to have almost been given up from the viewpoint of not imparting flame resistance at all, the composition for flameproof clearcoat Was found to surprisingly provide sufficient flameproofing for use when penetrated from the surface of the material to be coated into the inside of the resin layer, and the inventors further studied the same, and finally completed the present invention. In other words, in the present invention, as the layer thickness of the clear coat becomes thinner, the flameproof effect increases. In addition, in the present invention, various components that are inevitable even if viewed as a flammable composition are in a solution state having excellent permeability to the wood material, and a depth of 50 μm or more inward from the surface of the wood material inward. , Preferably at least 800 μm, more preferably at least 100 μm,
A surprisingly excellent flameproofing effect is achieved. Furthermore, the present inventor has proposed that a clear coat having an average layer thickness of 40 μm or less, preferably 0 to 30 μm is formed on the surface of the thin film flame-resistant clear coat using the composition for thin-film flame-proof clear coat. The composition has a depth average of 50 μm or more, preferably 80 μm or more, more preferably 100 μm or more inward from the woody surface.
The wooden material penetrated as described above and a wooden building manufactured using the wooden material and its constituent modules such as columns,
Ceiling boards, lintels, ranches, long pushes, floors, corridors, indoor / outdoor doors, siding panels, wet edges, roof boards (especially for heavy snowfall areas), accessories such as board walls, gables and gates, and tea rooms and Shia ( We also succeeded in the development of one or more thin-film flame-resistant clear coat-treated building components selected from TEI).

[0058]

EFFECTS OF THE INVENTION The composition for a thin-film flame-resistant clear coat of the present invention can exhibit the following various effects: (1) It does not contain any conventional flame-proofing agent, and has practically sufficient flame-proofing properties. (2) Flameproof clear coat layer has an average thickness of 4 on the surface of the wooden material
Despite being formed as thin as 0 μm or less, it contributes to penetrating more than 50 μm in depth inward from the surface of the wood material, and exhibits sufficient fire resistance to withstand the requirements of the Fire Service Law. (3) In the formulation in which the inorganic ultrafine particles coexist, a certain degree of ultraviolet ray preventing effect (evaluated by a change over time in water repellency) is also exhibited.

[0059]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below based on embodiments. However, the invention is not limited to them.

<Flame-proof test and evaluation> Excellent: AF: 7 sec or less; AG: 9 sec or less; CA: 50 cm ² or less; Good: AF: more than 7 sec to 9 sec; AG: more than 9 sec to 20 se
c or less; CA: 50 cm ² ultra ～60Cm ² or less; Valid: AF: 9 sec ultra ~10sec less; AG: 20sec super -3
0sec less; CA: 60cm ² ultra ～80Cm ² or less; No: AF: 10 sec greater; AG: 30 sec greater; CA: 80 cm
^More than ^two .

In the above evaluation, “excellent”, “good” and “effective” are included in “pass”. <Measurement of water repellency and its evaluation> In order to measure the time-dependent change in the water repellency (weather resistance) of the surface of the composition for a thin film flameproof clear coat of the present invention, an ultraviolet inhibitor [trade name: Tinuvin 326 (manufactured by Ciba-Geigy)] was measured using a wood material provided with a thin-film flame-resistant clear coat made of a composition to which 1% by weight was added, using the following measuring equipment and conditions. Measuring device: 300 Sunshine weather meter: WE
L-300H ・ Measurement conditions: ・ ・ Temperature BPT 63 ℃ ・ ・ Rainfall 18min / 120min. Procedure: A measurement sample was taken out every 100 hours of ultraviolet irradiation, and the degree of wetness of the surface was visually determined. For visual judgment, the contact angle and surface state of a water droplet on the coat surface of the measured sample were performed.

<< Rating of water repellency evaluation >> Pass: A small number of water droplets adhere to the clear coat (contact angle of more than 90 °), and discoloration, cracks or rough skin are slightly observed, but there is no problem in use; A water film or a large number of water droplets adhere to the coat, and discoloration, cracks or rough skin are considerably observed.

[0063]

Example 1 10 kg of the following aromatic petroleum resin as a non-halogen organic polymer (A1) and p- (2-phenyl-i-propyl) phenol (trade name: p) as a preservative and fungicide (B1) -
5 kg of cumylphenol), polyethylene wax as a low melting point polymer (C1) [crystalline melting point (DSC measurement: 47 ° C.); 1 kg of trade name: paraffin wax (manufactured by Nippon Seiwa Co., Ltd.)], low molecular weight amorphous polymer (D1) 2) Ethylene-propylene amorphous copolymer [kinematic viscosity (40 ° C.) 37,500 cSt] as the organic solvent (H), and 82 kg of the product name “Solvesso 150 (manufactured by Exxon)” as the hydrophobic organic solvent (H). Mixed solution 1
5 kg of an inorganic pigment (average particle size: 0.5 μm; trade name: Multilac (manufactured by Toyo Ink Mfg. Co., Ltd.)) as a pigment (P1) is added to 00 kg of the composition for a thin-film flame-resistant clear coat of wood. Was prepared.

The above-mentioned non-halogenated organic polymer (A1) is commercially available under the trade name “Petrosin 120 (formerly Mitsui Petrochemical Co., Ltd.)”, and its solid part has a softening point (ring and ball method) of 120 ° C.
It was shown.

The hydrophobic organic solvent (H) has a Tb (boiling point) of 1
64-167 ° C .; kinematic viscosity 0.02 cSt (25 ° C.); specific gravity (15
C.) 0.874. Using the obtained thin-film flame-resistant clear coat composition, a wood board (tree species: plywood; length 30
(0 mm × 400 mm × 2 mm thick) on a surface of a thin wood flame-resistant clear coat composition of a wood material prepared by the above procedure, the above clear coat composition having a basis weight (area density) of 200 g / m ^2. Was uniformly applied with a brush. The average thickness of this clear coat was 10 μm or less. Moreover, when the average penetration depth from the woody material surface to the inside of the thin film flameproofing clear coat composition was measured, it was 110 to 150 µm.

One of the two wooden boards with a clear coat was used as a test sample, and ultraviolet rays were first irradiated from outside the coated surface. When the coat state before and after irradiation for 200 hours was determined based on the water repellency of the surface, the evaluation “pass” before irradiation was “pass” even after irradiation, so it was determined that no change occurred on the coated surface. Was done.

Next, the following three items “AF (sec), AG” are applied to the coated surface of the test specimen which is the other of the two divided test specimens.
(sec) and CA (cm ² ) ". The results were: AF: 10 sec, AG: 10 sec and CA: 70 cm ²
, The evaluation was “good”. Table 1 shows the results of the flameproof test.

[0068]

EXAMPLE 2 20 kg of the same aromatic petroleum resin as in Example 1 as the non-halogenated organic polymer (A1), 2 k of the same polymer as in Example 1 as the low melting point polymer (C1)
g, 2 kg of the same polymer as in Example 1 as a low molecular weight amorphous polymer (D1) and 77 kg of an organic solvent [trade name: Solvesso 150 (manufactured by Exxon)] as a hydrophobic organic solvent (H)
Is uniformly mixed with a hydrophobic solution obtained, and 5 kg of the same pigment as in Example 1 is blended as a pigment (P1) per 100 kg of the hydrophobic solution to form a thin-film flame-resistant clear coat of wood material. A composition was prepared.

Using the obtained thin-film flame-retardant clear coat composition, a wooden board (tree type: cypress board; length 300 mm × width 40)
(0 mm × 4 mm thick) on a surface of the wood-based thin-film flame-resistant clear coat composition prepared by the above procedure on a basis weight (area density).
The coating was evenly applied to 200 g / m ² . The average thickness of this coat was 10 μm. Moreover, when the average penetration depth from the woody material surface to the inside of the thin film flameproofing clear coat composition was measured, it was 110 to 150 µm.

One of the two half sections of the clear coated wood board was used as a test piece, and ultraviolet rays were first irradiated from outside the coated face. When the coat state before and after irradiation for 200 hours was determined based on the water repellency of the surface, the evaluation “pass” before irradiation was “pass” even after irradiation, so it was determined that no change occurred on the coated surface. Was done.

Next, the following three items of the flameproof test “A” were applied to the coated surface of the test piece which is the other of the two divided test pieces.
F (sec), AG (sec) and CA (cm ² ) ". The evaluation was "good" because the results were AF: 5 sec, AG: 10 sec, and CA: 70 cm ² . Table 1 shows the results of the flameproof test.

[0072]

Example 3 10 kg of the same aromatic petroleum resin as in Example 1 as the non-halogenated organic polymer 1 (A1), and alkyd resin as the non-halogenated organic polymer 2 (A2) [Color: Carpenter No. 8 or less] , Acid value: 10 or less, viscosity (Cartoner; 2
5 ° C): LP, phthalic anhydride content: 25%, oil length: 65;
Type of oil and fat: linseed oil; nonvolatile content: 60 ± 1; solvent name: terpene-xylene; trade name: Arachid 6701-60 (manufactured by Arakawa Chemical Co., Ltd.)] 5 kg, as in Example 1 as a low melting polymer (C1) 1 kg of the same polymer, 2 kg of the same polymer as in Example 1 as the low molecular weight amorphous polymer (D1) and the same organic solvent 82 as in Example 2 as the hydrophobic organic solvent (H)
kg to a hydrophobic solution obtained by mixing uniformly.
5 kg of the same pigment as in Example 1 was blended per kg as the pigment (P1) to prepare a thin-film flame-resistant clear coat composition of wood material.

Using the obtained thin-film flame-resistant clear coat composition, a wood board (tree type: plywood; length 300 mm × width 400 mm)
× 2 mm thick) on the surface of the wood-based thin-film flame-resistant clearcoat composition prepared by the above procedure on a basis weight (area density) of 20
It was brush-coated evenly so as to be 0 g / m ² . The average thickness of this coat was 10 μm. Moreover, when the average penetration depth from the woody material surface to the inside of the thin film flameproofing clear coat composition was measured, it was 110 to 150 µm.

[0074] One of the two parts of the clear-coated wood board was used as a test sample, and ultraviolet rays were first irradiated from outside the coated surface. When the coat state before and after irradiation for 200 hours was determined based on the water repellency of the surface, the evaluation “pass” before irradiation was “pass” even after irradiation, so it was determined that no change occurred on the coated surface. Was done.

Next, the following three items of the flameproof test “A” were applied to the coated surface of the test piece which was the other of the two divided test pieces.
F (sec), AG (sec) and CA (cm ² ) ". The results were AF: 15 sec, AG: 15 sec, and CA: 80 cm ² , and the evaluation was “good”. Table 1 shows the results of the flameproof test.

[0076]

Example 4 As a non-halogen organic polymer (A1),
10 kg of the same aromatic petroleum resin as in Example 1, 1 kg of the same polymer as in Example 1 as the low melting point polymer (C1), and the same as in Example 1 as the low molecular weight amorphous polymer (D1) 2 kg of a polymer, 5 kg of titanium dioxide [TiO ₂ ; average particle size ≧ 0.1 μm (manufactured by Toyo Ink Mfg. Co., Ltd.)] as inorganic ultrafine particles and 82 kg of the same organic solvent as in Example 2 as a hydrophobic organic solvent (H) were used. The composition was uniformly mixed to prepare a thin-film flame-resistant clear coat composition of wood material.

Using the obtained thin-film flame-resistant clear coat composition, a wood board (tree type: plywood; length 300 mm × width 400 mm)
× 2 mm thick) on the surface of the wood-based thin-film flame-resistant clearcoat composition prepared by the above procedure on a basis weight (area density) of 20
It was brush-coated evenly so as to be 0 g / m ² . The average thickness of this coat was 10 μm. The average penetration depth from the surface of the wood material to the inside of the thin-film flame-resistant clear coat composition was 100 to 110 μm.

One of the two parts of the clear-coated wood board was used as a test sample, and ultraviolet rays were first irradiated from outside the coated surface. When the coat state before and after irradiation for 200 hours was determined based on the water repellency of the surface, the evaluation “pass” before irradiation was “pass” even after irradiation, so it was determined that no change occurred on the coated surface. Was done.

Next, the following three items of the flameproof test “A” were applied to the coated surface of the test specimen which is the other of the two divided test specimens.
F (sec), AG (sec) and CA (cm ² ) ". The evaluation was "excellent" because the results were AF: 3 sec, AG: 5 sec, and CA: 50 cm ² . Table 1 shows the results of the flameproof test.

[0080]

Example 5 10 kg of the same polymer as in Example 1 as a non-halogenated organic polymer (A1), a low melting polymer
1 k of the same polymer as in Example 1 as (C1)
g, 2 kg of styrene-butadiene copolymer as low molecular weight amorphous polymer (D1), titanium dioxide as inorganic ultrafine particles
5 kg of (TiO ₂ ) powder, 20 kg of trade name “Nonnen 509 (manufactured by Marubishi Yuka)” as a flame retardant (F) and ethylene glycol mono (2-ethylhexyl) ether (EHG) as a dispersant (G)
[Product name: 2-ethylhexyl glycol (manufactured by Nippon Emulsion Co., Ltd.)] For thin-film flameproof clear coating of wood material using 10 kg of hydrophobic organic solvent (H) and 52 kg of the same hydrophobic organic solvent as in Example 1. A composition was prepared.

Using the obtained composition for thin-film flame-resistant clear coat, a wooden board (tree type: cypress; length 300 mm × width 400)
mm × 8 mm thick) on the surface of the wood-based thin-film flame-resistant clearcoat composition prepared by the above procedure on a basis weight (area density) of 2
It was brush-coated uniformly so as to be 00 g / m ² . The average penetration depth from the surface of the wood material to the inside of the thin-film flame-resistant clear coat composition was 100 to 110 μm. The average thickness of this coat was a little over 10 μm.

One of the clear-coated wooden boards divided into two was used as a test body, and ultraviolet rays were first irradiated from outside the coated surface. When the coat state before and after irradiation for 200 hours was determined based on the water repellency of the surface, the evaluation “pass” before irradiation was “pass” even after irradiation, so it was determined that no change occurred on the coated surface. Was done.

Next, the following three items of the flameproof test “A” were applied to the coated surface of the test piece which is the other of the two divided test pieces.
F (sec), AG (sec) and CA (cm ² ) ". The evaluation was "excellent" because the results were AF: 0 sec, AG: 0 sec, and CA: 35 cm ² . Table 1 shows the results of the flameproof test.

[0084]

Example 6 In addition to 10 kg of the same polymer as in Example 1 as a non-halogenated organic polymer and 67 kg of the same organic solvent as in Example 2 as a hydrophobic organic solvent, a flame retardant (F; 10 kg of the same flame retardant as in Example 5 as a flame retardant and diethylene glycol mono (2-ethylhexyl) ether (EHDG) as a dispersant (G) [trade name: 2
-Ethylhexyl diglycol (Nippon Emulsifier) 10kg
Was added to 5 parts by weight (external amount) of the same pigment as in Example 1 per 100 parts by weight of the composition to prepare a thin-film flame-resistant clear coat composition of wood material.

Using the obtained composition for thin-film flame-proof clear coat, a wood board (species: plywood; length 300 mm × width 400 mm)
× 2 mm thick) on the surface of the wood-based thin-film flame-resistant clearcoat composition prepared by the above procedure on a basis weight (area density) of 20
It was brush-coated evenly so as to be 0 g / m ² . The average thickness of this coat was 10 μm. The average penetration depth from the surface of the wood material to the inside of the thin-film flame-resistant clear coat composition was 100 to 110 μm.

[0086] One of the two sections of the clear-coated wood board was used as a test piece, and ultraviolet rays were first irradiated from outside the coated face. When the coat state before and after irradiation for 200 hours was determined based on the water repellency of the surface, the evaluation “pass” before irradiation was “pass” even after irradiation, so it was determined that no change occurred on the coated surface. Was done.

Next, the following three items of the flameproof test “A” were applied to the coated surface of the test piece which is the other of the two divided test pieces.
F (sec), AG (sec) and CA (cm ² ) ". The evaluation was “excellent” because the results were AF: 3 sec, AG: 3 sec, and CA: 45 cm ² . Table 1 shows the results of the flameproof test.

[0088]

Comparative Example 1 (A) was used in place of the non-halogenated organic polymer (A1).
2) 20 kg, a petroleum solvent used in Example 1 as a hydrophobic organic solvent (H) [Tb (boiling point): 164 to 167 ° C; kinematic viscosity: 0.02 cSt (25 ° C); specific gravity: 0.874 (15 ° C) ; Trade name: Solvesso 150 (manufactured by Exxon)] 77 kg, low melting point polymer (C1)
The pigment (P1) was added to 100 parts by weight of a hydrophobic solution prepared by using 1 kg of the same material as in Example 1 and 2 kg of the same material as in Example 1 as the low molecular weight amorphous polymer (D1). As a result, a composition for thin-film clear coating of a wooden material was prepared, comprising 5 parts by weight of the same material as in Example 1.

Using the obtained thin-film flame-resistant clear coat composition, a wood board (tree type: plywood; length 300 mm × width 400 mm)
× 2 mm thick) on the surface of the wood-based thin-film flame-resistant clearcoat composition prepared by the above procedure on a basis weight (area density) of 20
It was brush-coated evenly so as to be 0 g / m ² . The average thickness of this coat was just over 40 μm. The average penetration depth from the surface of the wood material to the inside of the thin-film flame-resistant clear coat composition was measured to be less than 50 μm.

[0092] One of the two parts of the clear-coated wood board was used as a test sample, and ultraviolet rays were first irradiated from outside the coated surface. When the coat state before and after irradiation for 200 hours was judged based on the water repellency of the surface, the evaluation "pass" before irradiation was "impossible" after irradiation. It was determined that

Next, the following three items of the flameproof test “A” were applied to the coated surface of the test specimen which is the other of the two divided test specimens.
F (sec), AG (sec) and CA (cm ² ) ". As a result, AF: 30 sec, AG: 30 sec, and CA: 80 cm ² , the evaluation was “impossible”. Table 1 shows the results of the flameproof test.

[0092]

Comparative Example 2 Comparative Example 1 as a non-halogen organic polymer
20 kg of the same polymer as that used in (A2), 1 kg of the same polymer as in Example 1 as the low melting point polymer (C1), and the same as that in Example 1 as the low molecular weight amorphous polymer (D1) 2 kg of the product and 10 kg of the same flame retardant used in Example 6 as the flame retardant (F) were added to the dispersant (G).
Then, 10 kg of the same dispersant (EHDG) as in Example 6 and the same solvent as in Example 1 were added as the hydrophobic organic solvent (H) to prepare a composition for thin clear coating of wood.

Using the obtained thin-film flame-resistant clear coat composition, a wood board (tree type: plywood; length 300 mm × width 400 mm)
× 2 mm thick) on the surface of the wood-based thin-film flame-resistant clearcoat composition prepared by the above procedure on a basis weight (area density) of 20
It was brush-coated evenly so as to be 0 g / m ² . The average thickness of this coat was just over 40 μm. The average penetration depth from the surface of the wood material to the inside of the thin-film flame-resistant clear coat composition was measured to be less than 50 μm.

[0094] One of the two parts of the clear-coated wood board was used as a test body, and ultraviolet rays were first irradiated from outside the coated surface. When the coat state before and after irradiation for 200 hours was judged based on the water repellency of the surface, the evaluation "pass" before irradiation was "impossible" after irradiation. It was determined that

Next, the following three items of the flameproof test “A” were applied to the coated surface of the test specimen which is the other of the two divided test specimens.
F (sec), AG (sec) and CA (cm ² ) ". The results were AF: 25 sec, AG: 20 sec, and CA: 70 cm ² , and the evaluation was “impossible”. Table 1 shows the results of the flameproof test.

[0096]

[Table 1]

Claims (12)

[Claims] 1. A clear coat having an average layer thickness of 40 μm or less formed on a surface of a wooden material, mainly comprising a non-halogenated organic polymer and a hydrophobic organic solvent, and having a depth inward from the surface of the wooden material. A composition for a long-lasting water-repellent and thin-film flame-resistant clear coat that penetrates an average of 50 μm or more. 2. The non-halogenated organic polymer is a low molecular weight polymer, and is a solid hydrocarbon resin, a liquid hydrocarbon resin,
The thin film according to claim 1, wherein the thin film is at least one low molecular weight substance selected from alkyd resins, urethane resins, epoxy resins, phenolic resins, acrylic resins, natural waxes, hydrocarbon waxes, drying oils, and semidrying oils. Flameproof clearcoat composition. 3. The solid component in the non-halogenated organic polymer has a softening point of 60 to 180 ° C. according to a ring and ball method, and the liquid component of the polymer has a number average molecular weight of 2.5 in an undiluted state. The composition for a thin-film flame-resistant clear coat according to claim 1 or 2, wherein the composition is from × 10 ² to 1 × 10 ⁴ . 4. The hydrophobic organic solvent is a hydrocarbon solvent, and is selected from an aliphatic solvent selected from kerosene, light oil, petroleum benzine and the like, and an aromatic solvent selected from benzene, toluene, xylene and ethylbenzene. Or an ester solvent, at least one selected from ethyl acetate, butyl acetate, ethyl butyrate and amyl butyrate, a ketone solvent, at least one selected from methyl ethyl ketone and methyl isobutyl ketone, or an alcohol solvent And at least one selected from n-, i-, sec- or tert-butanol and 2-ethylhexanol.
3. The composition for a thin-film flame-resistant clear coat according to any one of 3. 5. The thin-film flameproof clear according to claim 1, wherein the weight ratio of the non-halogen organic polymer to the hydrophobic organic solvent is 8/92 to 40/60. Coating composition. 6. A composition for a thin-film flameproof clear coat of a wooden material mainly comprising a non-halogenated organic polymer and a hydrophobic organic solvent, wherein the solid component in the non-halogenated organic polymer is a ring-ball method. In addition to the fact that the polymer has a softening point of 80 to 150 ° C., the liquid component of the polymer has a number average molecular weight of 5 × 1
Solid hydrocarbon resin, liquid hydrocarbon resin, alkyd resin, urethane resin, epoxy resin, phenolic resin, acrylic resin, natural wax, hydrocarbon wax, drying oil and semi-drying which is 0 ^{2 to} 5 × 10 ³ One or more low molecular weight substances selected from oils, wherein the hydrophobic organic solvent is a hydrocarbon solvent, and one or more or esters selected from kerosene, light oil, petroleum benzene, benzene, toluene, xylene and ethylbenzene A solvent, at least one selected from ethyl acetate, butyl acetate, ethyl butyrate and amyl butyrate, a ketone solvent, at least one selected from methyl ethyl ketone and methyl isobutyl ketone, or an alcohol solvent. ,
One or more selected from n-, i-, sec- or tert-butanol and 2-ethylhexanol, and the weight ratio of the non-halogenated organic polymer / hydrophobic organic solvent is former / latter = 8/92. 2. The method according to claim 1, wherein
6. The composition for a thin-film flame-proof clear coat according to any one of claims 1 to 5. 7. Ultrafine inorganic particles having a fine particle size such that the grain of the substrate can be visually recognized from the outside of the clear coat formed of the thin film flameproofing composition, and based on the weight of the non-halogen organic polymer. Claims 1 to 200% by weight or less
7. The composition for a thin-film flameproof clear coat according to any one of 6. 8. The thin film protection according to claim 7, wherein the inorganic ultrafine particles are at least one selected from silicon oxide, metal silicate, metal borosilicate, zinc sulfide, zinc oxide, titanium oxide and calcium carbonate. Flame clear coat composition. 9. A flame retardant which is soluble in an organic solvent or can be stably dispersed in the organic solvent is contained in an amount of not more than 200% by weight based on the weight of the non-halogen organic polymer. 9. The composition for a thin-film flameproof clear coat according to any one of items 1 to 8. 10. The thin film according to claim 9, wherein the flame retardant is at least one selected from a phosphorus-based organic compound, a phosphorus-based halogenated organic compound, a phosphorus-nitrogen-based organic polymer, and a phosphate-based compound. Flameproof clearcoat composition. 11. A clear coat layer composed of a thin wood flame-retardant composition mainly composed of a non-halogen organic polymer and a hydrophobic organic solvent is applied on the surface of the wood material with an average layer thickness of 0 to 40 μm. The thin-film flame-resistant clear coat treated wood material according to any one of claims 1 to 10, wherein the thin-film flame-proof composition penetrates from the surface to the inside of the wood material to an average depth of 50 µm or more. . 12. The treatment using the thin film flame-retardant composition forms a clear coat having an average layer thickness of 40 μm or less on the surface of the wooden material and an average of 50 μm inward from the surface of the wooden material.
At least one selected from indoor / outdoor doors, siding panels, wet rims, shingles, roofing panels, gables and gates that are accessories that are constituent modules of wooden buildings that have penetrated by m or more, and tea rooms and Shiya (tei). The thin-film flameproof clear coat-treated building member according to any one of claims 1 to 11.