KR20190030148A - Panels Formed with Nonflammable Coated Layer for Buildings and Method of Forming Nonflammable Coated Layer on Panels - Google Patents

Abstract

According to the present invention, a method for forming a non-combustible coating layer on various building materials comprises the following steps of: adhering a glass fiber fabric to a surface of a substrate using a composition obtained by mixing water glass and expanded graphite; and coating the adhered glass fiber fabric with a hardening agent composition to be bonded to the water glass and hardened. The composition obtained by mixing the water glass and the expanded graphite preferably consists of 50 to 90 wt% of water glass and 10 to 50 wt% of expanded graphite, wherein for the water glass, sodium silicate, potassium silicate, or lithium silicate may be preferably used, the expanded graphite has a carbon component equal to or more than 95% and a particle size of 60 to 300 mesh, and a product having a foaming magnification of 250 to 350 times at 250 to 400°C may be preferably used. The used glass fiber fabric can be used for both a fabric woven in plain weave and a non-woven fabric, and can be preferably used by having the unit weight 0f 10 to 1,000 g/m2 and the thickness of 0.01 to 1.0 mm. The hardening composition is coated onto the glass fiber fabric to be bonded to the glass water and hardened, and comprises 0.3 to 3.0 parts by weight of acetic acid and 20 to 60 parts by weight of water based on 100 parts by weight of a silane compound to be preferably used.

Description

TECHNICAL FIELD [0001] The present invention relates to a method for forming a non-flammable coating layer and a non-flammable coating layer,

The present invention relates to a method for forming a nonflammable coating layer for imparting incombustibility or flame retardancy to a building material such as wood, plywood, styrofoam, urethane foam, polyethylene expanded form, various insulation materials, Urethane foam, PE foam foam, various insulation materials, and the like.

Building materials such as wood, plywood, styrofoam, urethane foam, expanded foam, and insulation have always been exposed to the risk of fire, and efforts to manufacture nonflammable products have continued. Recently, various legal regulations have been implemented at the government level to prepare for large-scale fires in various buildings and apartments. In Korea, the Building Code, the Enforcement Decree and the Enforcement Rules of the Building Code make it mandatory to use incombustible materials for building interior and exterior materials.

One of the methods for imparting flammability or flame retardancy to flammable building materials is water glass. Waterglass has been studied to mix flammable materials with incombustibles or flame retardants by mixing other inorganic materials such as silane compounds as minerals.

Water glass is soluble silicates, compounds in which silica (SiO ₂ ) and alkali metal oxide (M ₂ O) are bound in various molar ratios. Waterglass is one of the oldest and most familiar inorganic compounds. It is generally called water glass because it contains water in its structure and is expressed in the molecular formula of M ₂ O-nSiO ₂ -xH ₂ O and is soluble in water. Depending on the type of alkali metal (M), there are sodium silicate (sodium silicate), potassium silicate (silicic acid silicate) and lithium silicate. Sodium silicate is mixed with Na ₂ CO ₃ to the silica (SiO _2), and potassium silicate is a mixture of K ₂ CO ₃ in silica (SiO _2), it is prepared by melting the mixtures in 1,100~1,200 ℃. The glass thus formed is dissolved in water under high temperature and high pressure to become a transparent and viscous liquid.

Water glass has various properties depending on the molar ratio of silica to alkali metal and concentration of solution and is used for various purposes. In addition to the advantages of adhesion and bonding, dispersion, buffering, film formation, and corrosion resistance, water glass with environmental safety, strong and strong bonding force, ease of handling and use, heat resistance and flame retardancy is attracting attention as a valuable and unique material .

The water glass is easily absorbed on the surface of the metal oxide by the silicate in the aqueous solution producing a strong negative charge of SiO ₄ ^{4 -} . This surface adsorption effect is effective for preventing and dispersing coagulation, and is utilized in the detergent industry, the paper industry, and the ceramic industry. When water is removed from the silicate, it becomes increasingly sticky and viscous, and the film is easily formed on the surface. However, this film has the drawback of re-melting in water. In order to improve the water resistance of the water glass, it is necessary to select a silicate having a high molar ratio and to perform thermal drying or chemical hardening after coating.

Korean Patent No. 873652 discloses a flame retardant coating agent for flame-retardant treatment of foamed styrofoam particles which comprises (a) water glass, (b) anti-peeling component, (c) smoke suppression component, (d) An oil component comprising silicone oil dispersed in boiled oil, (e) a toxic gas inhibiting component, (f) a thermal insulation component, and (g) a silane adhesive component. This flame retardant coating agent contains a film-peeling preventing component, so that the foamed styrofoam particles that are flame-retarded by the flame retardant coating agent do not peel off the film at the time of molding, and have an effect of retarding the expansion of the combustion by retarding the ignition.

The present inventors have also produced a functional coating composition containing water in water glass, a silane compound, a boric acid compound, or a phosphoric acid compound, and filed a patent application No. 2009-128850. This functional coating composition was found to have excellent water resistance, stain resistance and flame retardancy. The present inventor has also developed a coating composition comprising water glass, borax, and water and filed it as a patent application No. 2010-86514. This coating composition has water resistance, stain resistance and flame retardancy, and is given gloss to the coating film, and it is possible to prevent scratching of the coating film by improving the surface hardness.

Korean Patent Laid-Open Publication No. 2015-65726 discloses a water glass having a molar ratio of SiO ₂ to M ₂ O of 3: 2 to 7: 1, M is selected from alkali metal and / or quaternary ammonium compounds, and b) Silane. ≪ / RTI >

Although the water glass itself is nonflammable, it can not be used for the purpose of nonflammability or flame retardance because it is soluble in water. For example, even when coating with water glass to impart incombustibility to wood or plywood, the coating layer absorbs moisture in the atmosphere, dissolves, and flows down. Non-flammability can not be expected if the coating layer flows down. Therefore, many attempts have been made to impart nonflammability by mixing silane compounds with water glass. However, a mixture of a water glass and a silane compound has overcome some solubility in water, but has a drawback that whitening occurs and the coating layer peels off.

In order to solve the above problems, the present inventor has developed a new method for forming a coating film on the surface of a building material so as to have a nonflammability, and filed a patent application No. 2017-117020. The method of the patent application consists of applying water glass to the surface of the workpiece to form a water glass coating layer, drying the water glass coating layer, and applying the silane mixture solution onto the dried water glass coating layer, The problem is following.

Accordingly, the inventors of the present invention have continued to develop a new method for forming a construction panel and a nonflammable coating layer of a new composition having a nonflammable coating layer formed on a substrate.

It is an object of the present invention to provide a method of forming a nonflammable coating layer on various building materials.

Another object of the present invention is to provide various building materials in which a nonflammable coating layer is formed.

Another object of the present invention is to provide various building materials having a nonflammable coating layer capable of solving the problems of various conventional building materials in which the waterglass coating layer is absorbed and dissolved in the atmospheric moisture.

Another object of the present invention is to provide various building materials having a nonflammable coating layer capable of solving the problems of various conventional building materials in which the waterglass coating layer is peeled off due to whitening.

These and other objects of the present invention can be achieved by the present invention which is described in detail below.

A method for forming a nonflammable coating layer on various building materials according to the present invention comprises adhering a glass fiber cloth to the surface of a substrate with a composition comprising water glass and expanded graphite and bonding the glass fiber cloth to water glass And a step of applying a curing agent composition for a curing agent.

The composition comprising water glass and expanded graphite is preferably composed of 50 to 90% by weight of water glass and 10 to 50% by weight of expanded graphite. As the water glass, sodium silicate (sodium silicate), potassium silicate (silicic acid silicate), or lithium silicate can be preferably used. The expandable graphite preferably has a carbon content of 95% or more, a particle size of 60 to 300 mesh, and an expansion ratio of 250 to 350 times at 250 to 400 캜.

The above-mentioned glass fiber fabrics may be woven in plain weave or nonwoven fabric, preferably having a unit weight of 10 to 1,000 g / m ² and a thickness of 0.01 to 1.0 mm.

The curing agent composition is applied onto a glass fiber fabric for curing by binding with water glass. The composition is preferably composed of 0.3 to 3.0 parts by weight of acetic acid and 20 to 60 parts by weight of water in 100 parts by weight of the silane compound. Preferred silane compounds include glycidoxypropyltrimethoxysilane (CH ₂ (O) CHCH ₂ OC ₃ H ₆ -Si- (OCH ₃ ) ₃ ), methyltrimethoxysilane (CH ₃ -Si- (OCH ₃ ) ₃ ), tetraethoxysilane (Si- (OC ₂ H ₅ ) ₄ ), methacryloxypropyltrimethoxysilane (H ₂ C═CH (CH ₃ ) C (O) OC ₃ H ₆ -Si- ₃ ) ₃ ), and vinyltrimethoxysilane (H ₂ C = CH-Si- (OCH ₃ ) ₃ ). Methyltrimethoxysilane is most preferably used. The silane compounds are all acidic.

The curing agent composition is prepared by mixing a silane compound, acetic acid, and water and cooling to room temperature while stirring for about 3 hours. Since these are exothermic reactions, it is preferable to cool them sufficiently at room temperature after stirring. The curing agent composition may be added in a small amount such as a dispersing agent, a defoaming agent, a leveling agent, etc., which are commonly used additives for paints.

Conventional coating methods such as spray, brush coating, roller coating, or dip coating can be preferably used as a method of applying the curing agent composition onto a glass fiber fabric.

An alkaline silane compound may be further added to the curing agent composition. The alkaline silane compound is aminoethylaminopropyltrimethoxysilane (H ₂ NC ₂ H ₄ HNC ₃ H ₆ -Si- (OCH ₃ ) ₃ ). When this alkaline silane compound is used, 50 parts by weight to 1,000 parts by weight of water are mixed with 100 parts by weight of the alkaline silane compound. Since this mixed reaction is also an exothermic reaction, it is preferable to sufficiently cool to room temperature after stirring. The alkaline silane mixture is preferably added in an amount of 1 to 10 parts by weight based on 100 parts by weight of the curing agent composition. If the alkaline silane mixture is added in an amount of 10 parts by weight or more per 100 parts by weight of the curing agent composition, the curing can be performed in a short time in about 20 minutes and the coating operation may be impossible.

When the alkaline silane mixture is added to the acidic curing agent composition, the alkaline silane mixture acts as a curing agent, so that the surface hardness is increased and a more firm gating film can be produced. It is understood that the curing agent composition which is an acidic silane mixture has a pH in the range of 3.0 to 5.0, and the alkaline silane mixture has a pH in the range of 11 to 13, and these are neutralized with each other to form a coating film.

A curing agent composition is applied to the glass fiber fabric bonded to the substrate and then dried to form a rigid non-flammable coating layer. It is preferable that the dried non-combustible product is aged at room temperature for 5 to 7 days before shipment.

The non-flammable coating layer according to the present invention can be applied to all kinds of substrates such as wood, plywood, styrofoam, urethane foam, expanded foam, insulation, and the like.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

The present invention can solve the problems of various conventional building materials in which the waterglass coating layer is absorbed and dissolved in the atmospheric water and the incombustible coating layer is formed which can solve the problems of various conventional building materials in which the waterglass coating layer is peeled off due to the whitening phenomenon And has the effect of providing various building materials and methods thereof.

1 is a schematic cross-sectional view showing a cross section of a substrate 100 on which a nonflammable coating layer 40 is formed.
FIG. 2 is a schematic cross-sectional view showing a cross section of a substrate 100 on which a flame is exposed to the incombustible coating layer 40 of FIG. 1 to form a nonflammable coating layer 40 in a fire situation.

The present invention relates to a method of forming a nonflammable coating layer for imparting incombustibility or flame retardancy to a building material such as wood, plywood, styrofoam, urethane foam, PE foam foam, heat insulating material and the like, and various building materials formed with a nonflammable coating layer.

A method for forming a nonflammable coating layer on various building materials according to the present invention comprises adhering a glass fiber cloth to the surface of a substrate with a composition comprising water glass and expanded graphite and bonding the glass fiber cloth to water glass Of the curing agent composition.

The composition comprising water glass and expanded graphite is preferably composed of 50 to 90% by weight of water glass and 10 to 50% by weight of expanded graphite. As the water glass, sodium silicate (sodium silicate), potassium silicate (silicic acid silicate), or lithium silicate can be preferably used. The expandable graphite preferably has a carbon content of 95% or more, a particle size of 60 to 300 mesh, and an expansion ratio of 250 to 350 times at 250 to 400 캜. Water glass and expanded graphite can be used by purchasing a commercially available product.

The above-mentioned glass fiber fabrics may be woven in plain weave or nonwoven fabric, preferably having a unit weight of 10 to 1,000 g / m ² and a thickness of 0.01 to 1.0 mm.

The glass fiber fabric is bonded to the surface of building materials such as wood, plywood, styrofoam, urethane foam, PE foam foam, various insulation materials and the like with a composition comprising water glass and expanded graphite. The method of adhering the glass fiber fabric with the composition of water glass and expanded graphite mixed on the surface of the substrate can be variously carried out. For example, a composition in which water glass and expanded graphite are mixed on the surface of various substrates already produced can be applied and the glass fiber fabric can be adhered thereon. It is also possible to apply a composition obtained by mixing water glass and expanded graphite to the surface of the substrate while bonding the glass fiber fabric thereon. In addition, in a process for producing various substrates, a composition comprising a mixture of water glass and expanded graphite on a substrate surface and a device for feeding glass fiber fabric at a constant speed are provided, and water glass and expanded graphite are mixed on the surface of the substrate, The textile fabric can be bonded. The substrate can be bonded to the glass fiber fabric with a composition of water glass and expanded graphite on either one surface or, if necessary, on both sides of the substrate. Conventional coating methods such as spraying, brush coating, roller coating, or immersion coating can be preferably used as a method of applying the composition comprising water glass and expanded graphite on a substrate. All of the above methods can be easily carried out by a person having ordinary skill in the art to which the present invention belongs.

A glass fiber fabric bonded to the substrate is applied with a curing agent composition for curing by bonding with water glass.

The curing agent composition is applied onto a glass fiber fabric for curing by binding with water glass. The composition is preferably composed of 0.3 to 3.0 parts by weight of acetic acid and 20 to 60 parts by weight of water in 100 parts by weight of the silane compound. Preferred silane compounds include glycidoxypropyltrimethoxysilane (CH ₂ (O) CHCH ₂ OC ₃ H ₆ -Si- (OCH ₃ ) ₃ ), methyltrimethoxysilane (CH ₃ -Si- (OCH ₃ ) ₃ ), tetraethoxysilane (Si- (OC ₂ H ₅ ) ₄ ), methacryloxypropyltrimethoxysilane (H ₂ C═CH (CH ₃ ) C (O) OC ₃ H ₆ -Si- ₃ ) ₃ ), and vinyltrimethoxysilane (H ₂ C = CH-Si- (OCH ₃ ) ₃ ). Methyltrimethoxysilane is most preferably used. The silane compounds are all acidic. Instead of acetic acid, sulfuric acid or hydrochloric acid can be used.

The curing agent composition is prepared by mixing a silane compound, acetic acid, and water and cooling to room temperature while stirring for about 3 hours. Since these are exothermic reactions, it is preferable to cool them sufficiently at room temperature after stirring. The curing agent composition may be added with a small amount of a dispersant, a defoaming agent, a leveling agent, and the like, which are commonly used additives for paints.

Conventional coating methods such as spray, brush coating, roller coating, or dip coating can be advantageously used as a method of applying the curing agent composition onto a glass fiber fabric, which is well known to those skilled in the art Can be easily carried out.

An alkaline silane compound may be further added to the curing agent composition. The alkaline silane compound is aminoethylaminopropyltrimethoxysilane (H ₂ NC ₂ H ₄ HNC ₃ H ₆ -Si- (OCH ₃ ) ₃ ). When this alkaline silane compound is used, 50 parts by weight to 1,000 parts by weight of water are mixed with 100 parts by weight of the alkaline silane compound. Since this mixed reaction is also an exothermic reaction, it is preferable to sufficiently cool to room temperature after stirring. The alkaline silane mixture is preferably added in an amount of 1 to 10 parts by weight based on 100 parts by weight of the curing agent composition. If the alkaline silane mixture is added in an amount of 10 parts by weight or more per 100 parts by weight of the curing agent composition, the curing can be performed in a short time in about 20 minutes and the coating operation may be impossible.

When the alkaline silane mixture is added to the acidic curing agent composition, the alkaline silane mixture acts as a curing agent, so that the surface hardness is increased and a more firm gating film can be produced. It is understood that the curing agent composition which is an acidic silane mixture has a pH in the range of 3.0 to 5.0, and the alkaline silane mixture has a pH in the range of 11 to 13, and these are neutralized with each other to form a coating film.

A curing agent composition is applied to the glass fiber fabric bonded to the substrate and then dried to form a rigid non-flammable coating layer. It is preferable that the dried non-combustible product is aged at room temperature for 5 to 7 days before shipment.

The non-combustible coating layer according to the present invention can be applied to all kinds of substrates such as wood, plywood, styrofoam, urethane foam, PE foam foam, various insulation materials and the like.

The substrate on which the incombustible coating layer according to the present invention is formed has a cross section as shown in Fig. 1 is a schematic enlarged cross-sectional view showing a cross section of a substrate 100 on which a nonflammable coating layer 40 is formed. An adhesive layer 10 coated with a composition of water glass and expanded graphite is formed on the base material 100, and the glass fiber fabric 20 is adhered thereon. Water glass and expanded graphite permeate and penetrate between the fibers of the glass fiber fabric 20. A curing agent composition is applied on the glass fiber fabric 20, and the curing agent composition and water glass are combined to form a waterproof bonding layer 30. [ The adhesive layer 10, the glass fiber fabric 20 and the waterproof bonding layer 30 are cured to form the incombustible coating layer 40.

2 is a schematic enlarged cross-sectional view showing a cross section of a substrate 100 on which a non-combustible coating layer 40 is formed in a fire situation by exposing a flame to the incombustible coating layer 40 of FIG. If the flame is exposed to the incombustible coating layer 40 for a long time, as in the actual fire situation, the waterproof bonding layer 30 and the glass fiber fabric 20, which are nonflammable as shown in FIG. However, the adhesive layer 10 starts expanding the expanded graphite contained therein. The expanded graphite layer forms a kind of heat insulating layer. The heat is not transferred to the substrate 100 because the heat insulating layer is formed by the expanded graphite. Therefore, even if the flame is exposed to the incombustible coating layer 40 for a long time as in the case of fire, the flame is blocked by the waterproof bonding layer 30 and the glass fiber fabric 20, and the heat is blocked by the expanded graphite layer. As a result, the substrate 100, such as wood, plywood, styrofoam, urethane foam, PE foam foam, thermal insulation, etc., is protected from fire and is not burnt.

The curing agent composition and the alkaline silane mixture solution are colorless and transparent, and the formed coating layer is also colorless and transparent. Therefore, when a specific color is desired to be exhibited, such as a paint having a color, a pigment can be further added. In the case of forming a white coating layer, titanium oxide (TiO ₂ ) is further added to the mixture solution. Depending on the color, pigments such as iron oxide and silica fume may be used. The pigment is preferably added in an amount of 20 to 60 parts by weight based on 100 parts by weight of the curing agent. As a common additive for paints, small amounts of dispersants, antifoaming agents, leveling agents and the like can be added. The addition amount of these additives is within 1.0% by weight of the total composition, and this can be easily carried out by a person having ordinary skill in the art to which the present invention belongs.

The water glass formed by the double structure of the water glass coating layer and the silane coating layer and the silane firmly combine to form a water-insoluble rigid coating layer. Such a water-insoluble and rigid coating layer can prevent water solubility by absorbing moisture in the air and prevent whitening phenomenon in which the water-glass coating layer is separated from the silane coating layer.

In another embodiment of the present invention, the glass fiber fabric 20 may be glued in two or three layers. A composition consisting of water glass and expanded graphite is applied again on the first glass fiber cloth 20 adhered to the base material 100 and a second glass fiber fabric (not shown) is adhered thereon. A curing agent composition is applied onto the second glass fiber fabric, and the curing agent composition and water glass are combined to form a waterproof bonding layer (30). Even when three-ply glass fiber fabrics are adhered, they are adhered in the same manner as the second glass fiber cloth adhering.

When a double-layered glass fiber cloth is adhered, when the flame is exposed to the incombustible coating layer 40 for a long time, as in the case of a fire, the expanded graphite expands in the adhesive layer 10 between the substrate 100 and the first glass fiber cloth And the expanded graphite is expanded in the adhesive layer between the first glass fiber cloth and the second glass fiber cloth to form the second heat insulating layer. Therefore, in this case, the two expanded graphite heat insulating layers block the heat as much as possible, thereby increasing the incombustibility. Typically, a single layer of glass fiber fabric exhibits sufficient nonflammability, but a double layer of glass fiber fabric may be attached to further improve the nonflammability. A three-ply glass fiber fabric may be attached if a high level of nonflammability is desired.

The non-flammable coating layer forming method according to the present invention can be applied to all materials requiring incombustibility such as wood, plywood, styrofoam, urethane foam, synthetic foam foam, heat insulating material and the like. In addition, office cubicles, furniture materials and interior materials such as automobiles are all available. The nonflammable coating layer is formed on one side or both sides of the material. Of course, materials with four sides like pillars of Hanok architecture can form nonflammable coatings on all four sides.

The present invention will now be illustrated by the following examples, which are to be regarded as illustrative in nature and are not to be construed as limiting or limiting the scope of protection of the present invention.

Example

Example  One

A composition consisting of 66% by weight of water glass and 34% by weight of expanded graphite was coated on one surface of a plywood of 8.5Tx1220x2440 standard using a coating roller. Sodium silicate (sodium silicate) was used as the water glass, expanded graphite having a carbon content of 95% or more, a particle size of 80 mesh, and an expansion ratio of 300 times at 300 ° C. was used. A glass fiber fabric was adhered to the surface of the coated substrate. As the glass fiber fabric, a plain weave fabric having a unit weight of 150 g / m ² and a thickness of 0.3 mm was used. The curing agent composition was applied onto the adhered glass fiber fabric using a coating roller. The curing agent composition was prepared by adding 0.5 parts by weight of acetic acid and 35 parts by weight of water to 100 parts by weight of the silane compound and cooling the mixture to room temperature while stirring for about 3 hours. With a silane compound were used methyltrimethoxysilane _{(CH 3 -Si- (OCH 3)} 3). The methyltrimethoxysilane used was XIAMETER (R) OFS-6070 silane from Dow Corning.

The non-flammable coating layer formed on the substrate was dried at room temperature and aged for 3 days. The incombustibility was tested according to KS F 2271 for the incombustible plywood produced in this example. As a result of the test, it was evaluated that it corresponds to second grade of fire - proof. Water resistance and stain resistance were good, whitening did not occur.

As a result of the flame being exposed to the nonflammable coating layer of the substrate for about one hour, the waterproof bonding layer 30 and the glass fiber cloth 20, which are nonflammable as shown in FIG. 2, Expanded graphite expanded to form a graphite layer expanded to a thickness of about 7 to 8 mm.

Example  2

Except that potassium silicate was used as water glass and vinyltrimethoxysilane (H ₂ C = CH-Si- (OCH ₃ ) ₃ ) was used instead of methyltrimethoxysilane . Vinyl trimethoxysilane was XIAMETER (R) OFS-6300 silane from Dow Corning. As a result of the test, it was evaluated that it corresponds to second grade of fire - proof. Water resistance and stain resistance were good, whitening did not occur.

As a result of the flame being exposed to the nonflammable coating layer of the substrate for about one hour, the waterproof bonding layer 30 and the glass fiber cloth 20, which are nonflammable as shown in FIG. 2, Expanded graphite expanded to form a graphite layer expanded to a thickness of about 7 to 8 mm.

Example 3

The procedure of Example 1 was repeated, except that the alkaline silane mixture solution was further added to the curing agent composition in Example 1. The alkaline silane mixture solution was prepared by mixing 100 g of aminoethylaminopropyltrimethoxysilane (H ₂ NC ₂ H ₄ HNC ₃ H ₆ -Si- (OCH ₃ ) ₃ ) and 100 g of water. XIAMETER (R) OFS-6020 silane from Dow Corning Inc. was used as the aminoethylaminopropyltrimethoxysilane. The alkaline silane mixture solution was added in an amount of 3 parts by weight based on 100 parts by weight of the curing agent composition. As a result of the test, it was evaluated that it corresponds to second grade of fire - proof. Water resistance and stain resistance were good, whitening did not occur.

As a result of the flame being exposed to the nonflammable coating layer of the substrate for about one hour, the waterproof bonding layer 30 and the glass fiber cloth 20, which are nonflammable as shown in FIG. 2, Expanded graphite expanded to form a graphite layer expanded to a thickness of about 6 to 7 mm.

Example 4

The procedure of Example 1 was repeated except that a composition consisting of 90% by weight of water glass and 10% by weight of expanded graphite was used. As a result of the test, it was evaluated that it corresponds to second grade of fire - proof. Water resistance and stain resistance were good, whitening did not occur.

As a result of the flame being exposed to the nonflammable coating layer of the substrate for about one hour, the waterproof bonding layer 30 and the glass fiber cloth 20, which are nonflammable as shown in FIG. 2, Expanded graphite expanded to form a graphite layer expanded to a thickness of about 5 to 6 mm.

Example 5

The procedure of Example 1 was repeated except that a composition consisting of 60% by weight of water glass and 40% by weight of expanded graphite was used. As a result of the test, it was evaluated that it corresponds to second grade of fire - proof. Water resistance and stain resistance were good, whitening did not occur.

As a result of the flame being exposed to the nonflammable coating layer of the substrate for about one hour, the waterproof bonding layer 30 and the glass fiber cloth 20, which are nonflammable as shown in FIG. 2, Expanded graphite expanded to form a graphite layer expanded to a thickness of about 10 to 12 mm.

Comparative Example 1

The procedure of Example 1 was repeated except that a composition consisting of 95% by weight of water glass and 5% by weight of expanded graphite was used. As a result of the test, it was evaluated that it corresponds to second grade of fire - proof. Water resistance and stain resistance were good, whitening did not occur.

As a result of the flame being exposed to the nonflammable coating layer of the substrate for about one hour, the waterproof bonding layer 30 and the glass fiber cloth 20, which are nonflammable as shown in FIG. 2, Expanded graphite slightly expanded to form a graphite layer expanded to a thickness of about 2 to 3 mm.

Comparative Example  2

The procedure of Example 1 was repeated except that a composition consisting of 50 wt% of water glass and 50 wt% of expanded graphite was used. As a result of the test, it was evaluated that it corresponds to second grade of fire - proof. Water resistance and stain resistance were good, whitening did not occur.

As a result of the flame being exposed to the nonflammable coating layer of the substrate for about one hour, the waterproof bonding layer 30 and the glass fiber cloth 20, which are nonflammable as shown in FIG. 2, Expanded graphite slightly expanded to form a graphite layer expanded to a thickness of about 12 to 13 mm. No further expansion of the graphite layer was observed. That is, it is considered unnecessary to add expanded graphite of 50 wt% or more.

Comparative Example  3

The procedure of Example 1 was repeated, except that the composition consisting of water glass and expanded graphite was applied without applying a glass fiber fabric, and then the curing agent composition was applied. As a result of the test, it was evaluated that it corresponds to second grade of fire - proof. Water resistance and stain resistance were poor, and whitening occurred.

As a result of exposing the flame to the incombustible coating layer of the substrate for about 1 hour, the expanded graphite was foamed and scattered to the outside along with the flame. Expansive graphite scattered with flame implies the risk of fire. When the glass fiber fabric is adhered, it plays a role of preventing the expanded expanded graphite from scattering to the outside.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (18)

Characterized in that a non-combustible coating layer is formed by adhering a glass fiber cloth to the surface of a substrate with a composition comprising a mixture of water glass and expanded graphite, and applying a curing agent composition for curing by bonding to the glass fiber cloth panel.
The panel for a building according to claim 1, wherein the composition comprising the water glass and the expanded graphite is composed of 50 to 90 wt% of water glass and 10 to 50 wt% of expanded graphite.
The water glass according to claim 1, wherein the water glass is at least one selected from the group consisting of sodium silicate (sodium silicate), potassium silicate (silicic acid gallium), and lithium silicate, and the expanded graphite has a carbon content of 95% Wherein the glass fiber fabric is a woven or nonwoven fabric woven in plain weave having a unit weight of 10 to 1,000 g / m < ² > and a weight of from 0.01 to 1.0 mm Wherein the panel has a thickness.
The composition according to claim 1, wherein the curing agent composition is applied onto a glass fiber fabric to cure by binding with water glass, wherein 0.3 to 3.0 parts by weight of acetic acid and 20 to 60 parts by weight of water are contained in 100 parts by weight of the silane compound Architectural panel.
The method of claim 4, wherein the silane compound is selected from the group consisting of glycidoxypropyltrimethoxysilane (CH ₂ (O) CHCH ₂ OC ₃ H ₆ -Si- (OCH ₃ ) ₃ ), methyltrimethoxysilane (CH ₃ -Si - (OCH _{3) 3),} tetra-ethoxy-silane _{(Si- (OC 2 H 5)} 4), methacryloxypropyl trimethoxy silane _{(H 2 C = CH (CH} 3) C (O) OC 3 H 6 -Si- (OCH _{3) 3),} and vinyltrimethoxysilane _{(H 2 C = CH-Si-} (OCH 3) 3) construction panel, characterized in that at least one selected from the group consisting of.
5. The panel according to claim 4, wherein the curing agent composition further comprises at least one selected from the group consisting of a dispersant, a defoaming agent, and a leveling agent, which are used as general additives for paints.
The curing agent composition according to claim 4, wherein the alkaline silane mixture obtained by mixing 50 to 1,000 parts by weight of water with 100 parts by weight of the alkaline silane compound is added in an amount of 1 to 10 parts by weight based on 100 parts by weight of the curing agent composition Building panel.
The panel according to any one of claims 1 to 7, wherein the glass fiber fabric is bonded in two or three layers.
The panel according to any one of claims 1 to 8, wherein the substrate is wood, plywood, styrofoam, urethane foam, or PE foam foam.
Adhering a glass fiber cloth to a substrate surface with a composition comprising water glass and expanded graphite; And
Applying a curing agent composition to said bonded glass fiber fabric in combination with water glass for curing;
≪ / RTI > wherein the non-combustible coating layer is formed on the substrate.
The method according to claim 10, wherein the step of adhering the glass fiber cloth to a surface of the base material with a composition comprising water glass and expanded graphite,
Applying a composition comprising water glass and expanded graphite to the substrate surface; And
Adhering a glass cloth to the applied substrate;
≪ / RTI > wherein the non-combustible coating layer is formed on the substrate.
12. The method of claim 10 or 12, wherein the composition comprising the water glass and the expanded graphite is composed of 50 to 90 wt% of water glass and 10 to 50 wt% of expanded graphite. How to.
13. The graphite according to claim 12, wherein the water glass is at least one selected from the group consisting of sodium silicate (sodium silicate), potassium silicate (silicic acid gallium), and lithium silicate, and the expanded graphite has a carbon content of 95% Wherein the glass fiber fabric is a woven or nonwoven fabric woven in plain weave having a unit weight of 10 to 1,000 g / m < ² > and a weight of from 0.01 to 1.0 mm Wherein the nonflammable coating layer is formed on the surface of the substrate.
[14] The composition of claim 12, wherein the curing agent composition is applied onto a glass fiber fabric for curing by binding to water glass, wherein 0.3 to 3.0 parts by weight of acetic acid and 20 to 60 parts by weight of water are contained in 100 parts by weight of the silane compound A method of forming a nonflammable coating layer on a building material.
The method of claim 12, wherein the silane compound is selected from the group consisting of glycidoxypropyltrimethoxysilane (CH ₂ (O) CHCH ₂ OC ₃ H ₆ -Si- (OCH ₃ ) ₃ ), methyltrimethoxysilane (CH ₃ -Si - (OCH _{3) 3),} tetra-ethoxy-silane _{(Si- (OC 2 H 5)} 4), methacryloxypropyl trimethoxy silane _{(H 2 C = CH (CH} 3) C (O) OC 3 H 6 (OCH ₃ ) ₃ ), and vinyltrimethoxysilane (H ₂ C = CH-Si- (OCH ₃ ) ₃ ). Way.
12. The method of claim 11, wherein the curing agent composition further comprises at least one selected from the group consisting of a dispersant, a defoaming agent, and a leveling agent, which are used as general additives for paints.
The curing agent composition according to claim 12, wherein the alkaline silane mixture comprising 100 parts by weight of the alkaline silane compound and 50 to 1,000 parts by weight of water is added in an amount of 1 to 10 parts by weight based on 100 parts by weight of the curing agent composition To form a nonflammable coating layer on the building material.
A method according to any one of claims 10 to 17, wherein the substrate is wood, plywood, styrofoam, urethane foam, or PE foam foam.

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