JP5550432B2 - Flame retardant coating composition and plate-like body using the same - Google Patents

Description

  The present invention relates to a flame retardant coating composition and a plate-like body using the composition as a coating layer.

  Conventionally, halogen-based flame retardants have been widely used as flame retardants for flame retardant coating compositions (see, for example, Patent Document 1). However, there are problems of dioxins and chlorofluorocarbons generated from this halogen flame retardant, which is not preferable for environmental protection.

  In addition, inorganic flame retardants such as aluminum hydroxide are also used. However, aluminum hydroxide has problems such as deterioration of physical properties and water resistance of the coating material and the substrate coated with the coating material.

  In addition, flame retardants containing swellable inorganic compounds as essential components for the application to architectural inorganic boards to form a flame retardant layer have been studied, but with other components such as water-soluble polymers. There is a problem that the viscosity becomes too high due to the action and the coatability is lowered.

  On the other hand, in the case of an architectural inorganic board to which organic binders or reinforcing fibers are added as components, in order to maintain the flame retardancy, flame retardancy such as aluminum hydroxide or magnesium hydroxide is used as the base material. A method of adding a substance has been considered (for example, see Patent Document 2).

JP-A-7-186333 JP 2003-191395 A

  However, when aluminum hydroxide or the like is added to the entire base material, there is a problem that the weight of the entire building inorganic board increases and the mechanical strength decreases.

  This invention is made | formed in view of such a problem, The objective has the outstanding flame retardance and coating property, and reduces the physical property of a to-be-coated article (base material). An object of the present invention is to provide a resin coating composition having no resin and a plate-like body using the resin coating composition.

In order to achieve the above object, the flame retardant coating composition according to the invention of claim 1 is wet pulverized using a deflocculant or a dispersant to form a scale, and SiO ₂ , MgO or Al ₂ 0 ₃ and the swellable inorganic compound that swells captures moisture between the layers as a main component, consists clay minerals, starch or superabsorbent polymers, and water-swellable substance volume expands by absorbing water, soap-free The emulsion adhesive is contained. The “scale-like” is a scale-like fine piece, and is meant to include a flat piece.

  In the first aspect of the invention, since the flame-retardant coating composition contains a scaly swellable inorganic compound and a soap-free emulsion adhesive, an object to be coated (for example, an architectural base material) ), A flame retardant coating composition exhibiting high flame retardant performance in consideration of the environment is obtained.

  Moreover, since the water-swellable substance is added to the coating composition, the adhesion as the flame-retardant coating composition is improved, and the flame retardancy and heat insulation are stabilized. In addition, even when a flame retardant coating composition is applied to the surface of an object to be coated and a coating layer is formed by drying and curing, small cracks are difficult to occur, which is preferable not only in appearance but also as a barrier as a coating film. Performance (flame retardant performance) is stabilized.

Furthermore, Rise Junsei inorganic compound, since the ground by a wet using a deflocculant or dispersant is as scaly, by grinding in a wet using a deflocculant or dispersant, scale The stable particle size distribution, shape, etc. of the swellable inorganic compound are stable, and as a result, a high-quality flame-retardant coating composition can be obtained.

The inventions of claims 2 to 5 are inventions related to a plate-like body using a flame retardant coating composition, and the plate-like body of the invention of claim 2 is first on one side or both sides of the first building base material. A plate-like body having a coating layer, wherein the first coating layer is formed of the flame retardant coating composition according to claim 1 .

In the invention of this second aspect , since it has a coating layer on one side or both sides of the building base material, and the coating layer is formed of the flame retardant coating composition according to the invention of the first aspect , Compared with a non-painted plate-like body (architectural base material), a plate-like body exhibiting significant effects in flame retardancy and a decrease in thermal conductivity to the non-heated surface is obtained.

The plate-like body of the invention of claim 3 is characterized in that the plate-like body of claim 2 is used as a core material, and the second building base material is adhered to the front and back surfaces of the core material.

In this invention of Claim 3 , since the plate-shaped body is a multi-layered thing of the core material having the first building base material and the second building base material adhered to the front and back surfaces thereof, A high-strength plate-like body that exhibits a significant effect on flame retardancy and a decrease in thermal conductivity to the non-heated surface is obtained. In particular, when an architectural base material having a higher specific gravity than the first architectural base material of the core is used as the second architectural base material on the front and back surfaces, a plate having a higher strength can be obtained.

Plate-shaped body of the invention of claim 4, the plate-shaped body surface or front and back surfaces of the invention of claim 3, and a second coating layer is provided consisting of further flame retardant coating composition of claim 1 It is characterized by that.

In this invention of Claim 4, the coating film layer formed with the flame retardant coating composition in the plate-shaped body is composed of the first coating film layer in the core material and the second coating film layer on the front surface or the back surface. Therefore, a significant effect can be further exhibited in the decrease in thermal conductivity by the increase in the number of coating layers.

In the plate-like body of the invention according to claim 5 , a metal plate is laminated on the surface or front and back surfaces of the plate-like body according to claim 4 , and the first building base material in the plate-like body as the core material is a fiber board. It is characterized by.

In this invention of Claim 5 , since the metal plate is laminated | stacked on the surface or front and back of a plate-shaped body, the high intensity | strength plate-shaped body which can express a significant effect in the fall of heat conductivity is obtained. Moreover, nonflammability can be improved by a metal plate.

  Further, since the first building base material of the plate-like body as the core material is a fiber board such as a wood fiber board or a rock wool board, it is lightweight and has high heat insulation properties, and no harmful gas is generated during combustion. Increases safety against fire. In particular, since the fiberboard is provided with a coating layer to promote carbonization when heated, an abrupt combustion phenomenon (deflagration phenomenon) hardly occurs, and the safety at the time of fire can be further improved.

As described above, according to the invention of claim 1, a swellable inorganic compound is formed by wet pulverization using a peptizer or a dispersant to form a scale, and SiO ₂ , MgO, or Al ₂ 0 ₃ as a main component . And a water-swellable substance made of clay mineral, starch or superabsorbent polymer, and a soap-free emulsion adhesive to make a flame retardant coating composition, It is possible to obtain a flame retardant coating composition that exhibits high flame retardant performance without degrading the physical properties and water resistance, etc., and also with consideration for the environment. Furthermore, by adding a water-swellable substance, the adhesion of the flame retardant coating composition can be improved, the flame retardancy and heat insulation can be stabilized, and the coating layer can be applied to the surface of the object to be coated. When formed, the appearance appearance can be improved and the barrier performance (flame retardant performance) can be stabilized.

Also, the swellable inorganic compound, by being ground by a wet using a deflocculant or dispersant is a flaky, to stabilize the particle size distribution and the shape of the bulging Junsei inorganic compounds, good quality A flame retardant coating composition is obtained.

According to the invention of claim 2 , by forming the coating layer of the base material for building with the flame retardant coating composition of claim 1 , it is significant in flame retardancy and a decrease in thermal conductivity to the non-heated surface. A plate-like body exhibiting the effect is obtained.

According to the invention of claim 3 , by using the plate-like body of claim 2 as a core material and attaching different building base materials to the front and back surfaces thereof, the core material and the building base materials on the front and back surfaces A high-strength plate-like body composed of a plurality of layers is obtained, and in particular, a plate-like body having a higher strength than that of the core material can be obtained by using a construction substrate having front and back surfaces having a higher specific gravity than the core material.

According to the invention of claim 4, the surface or the front and back surfaces of the plate-like body according to claim 3, by forming the coating layer by further flame retardant coating composition of claim 1, by a flame retardant coating composition By increasing the coating layer, a plate-like body that exhibits a more significant effect due to a decrease in thermal conductivity can be obtained.

According to the invention of claim 5 , the metal plate is laminated on the front surface or the front and back surfaces of the plate-like body of claim 4 , and the building base material in the plate-like body as the core material is the fiber board, With the metal plates laminated on the front surface or the front and back surfaces, a high-strength plate-like body capable of exhibiting a significant effect on the decrease in thermal conductivity can be obtained, and the nonflammability can be increased. Further, since the building base material for the core plate-like body is a fiber board, it is lightweight and has high heat insulation properties, and generation of harmful gas during combustion is avoided to increase safety against fire. Furthermore, since the fiberboard is provided with a coating layer, carbonization is promoted when heated, so that the deflagration phenomenon that is rapid combustion hardly occurs, and the safety at the time of fire can be further improved.

FIG. 1 is a cross-sectional view showing a flame-retardant building board having a coating layer formed on the surface thereof by the flame-retardant coating composition according to Embodiment 1 of the present invention. FIG. 2 is a view corresponding to FIG. FIG. 3 is a view corresponding to FIG. FIG. 4 is a view corresponding to FIG. FIG. 5 is a diagram showing fire resistance test results for Examples 1 to 3 and Comparative Example. FIG. 6 is a diagram showing the fire resistance test results for Example 4.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following description of the preferred embodiments is merely exemplary in nature and is in no way intended to limit the invention, its application, or its application.

(Embodiment 1)
FIG. 1 shows a plate-like body A1 using the flame-retardant coating composition according to Embodiment 1 of the present invention, and this plate-like body A1 is used as a flame-retardant building board. The plate-like body A1 has a building base material 1 (first building base material) as a substrate and a coating layer 2 (first coating layer) formed on the surface that is one side thereof. The coating layer 2 is formed of a flame retardant coating composition, and the flame retardant coating composition is applied to the building substrate 1 and dried and solidified, and functions as a flame retardant layer.

(1) Architectural base material The architectural base material may be, for example, a plaster board, a calcite board, a volcanic glassy multilayer board, a metal board, a resin board, a rock wool board, an insulation board or the like. Can be appropriately selected.

The coating amount at the time of forming the architectural substrate by applying the flame-retardant coating composition coating layer 2 is good about 150 g / m ² from 30 g / m ² in terms of solid content, of the building base material What is necessary is just to design suitably according to a characteristic, required flame retardance performance, etc.

  The coating method is not particularly specified, and a known method such as a roll coater, a flow coater, or a spray may be used. The drying and solidification method can be performed by a known method such as a hot air dryer.

  The coating layer 2 as the flame retardant layer does not need to be formed so as to completely coat the surface of the building base material 1, and can be made into a building board with improved design by applying pin hole processing or the like. it can.

(2) Flame-retardant paint composition The flame-retardant paint composition used as the coating layer 2 contains a scaly swellable inorganic compound, a water-swellable substance, and a soap-free emulsion adhesive. It is what.

  In the flame-retardant coating composition, the solid content is 35 wt% or more and 60 wt% or less, preferably 40 to 55 wt%. This is because if the solid content is less than 35% by weight, the required flame retardancy cannot be obtained, while if it exceeds 60% by weight, it becomes difficult to apply uniformly and the flame retardancy varies. In addition, when the viscosity is adjusted to a low viscosity of 20 to 60 seconds with a Ford Cup No. 4, it is desirable that the coating can be performed satisfactorily.

(Swellable inorganic compounds)
The swellable inorganic compound is mainly composed of SiO ₂ , MgO, Al ₂ O ₃ , and examples thereof include natural minerals or compounds such as kaolin group, smectite group, vermiculite group, mica group, and the like. . In particular, highly swellable smectite montmorillonite, vermiculite group, mica group swellable mica and the like are preferable. These are pulverized into scales (including flat particles).

The method of pulverizing into scales is not particularly limited, and ball mill pulverization, medium stirring mill pulverization, or the like is used. Swellable inorganic compound, deflocculants or dispersants, to grind in wet by adding a grinding aid or the like on the quality stability preferred.

  Peptides or dispersants include acids such as nitric acid, acetic acid, oxalic acid, hydrochloric acid and sulfuric acid, alcohols such as methanol, ethanol, isopropanol and butanol, aluminum such as aluminum chloride, aluminum oxalate, aluminum acetate and aluminum nitrate Examples thereof include salts, sodium salts such as sodium hydroxide, sodium carbonate and sodium silicate, and surfactants.

  In addition, polyacrylic acid soda, nitrohumic acid soda, tannic acid, lignic acid, lignin sulfonic acid, condensed phosphate and the like may be used.

  Examples of the grinding aid include alcohols such as methanol, ethanol, propanol and butanol, glycols such as propylene glycol, polypropylene glycol and ethylene glycol, amines such as triethanolamine, palmitic acid, stearic acid and oleic acid. Examples include higher fatty acids, aluminum alkoxides, carbon materials such as carbon black and graphite.

  These peptizers, dispersants, and grinding aids may be used alone or in combination of two or more.

  The swellable inorganic compound pulverized in a scale shape may have a median particle diameter (median diameter) of 24 to 35 μm. This is because if the median particle size is less than 24 μm, the viscosity of the coating composition becomes too large and it becomes difficult to stir and disperse and the productivity is lowered, while if it exceeds 35 μm, the flame retardancy is lowered.

  Moreover, when the particle size in the whole 10% volume amount is 8 to 12 μm or less and the particle size in the whole 90% volume amount is 50 to 80 μm or less, the viscosity of the paint can be suppressed to be moderately low, and the paintability and mechanical suitability ( Flow coater suitability) is further improved.

  The amount of the swellable inorganic compound added is 70 parts by weight or less, preferably 60 parts by weight or less with respect to 100 of water. When the added amount exceeds 70 parts by weight, the viscosity becomes too large, and it becomes difficult to disperse with stirring, resulting in low productivity, and it becomes difficult to uniformly apply, resulting in variations in flame retardancy and heat insulation performance. Because it occurs.

(Water swellable substance)
The water-swellable substance is added to improve the adhesion to the architectural base material 1 that is the object to be coated of the flame-retardant coating composition and to stabilize the flame retardancy. Absorbs and expands in volume. Examples thereof include clay minerals such as bentonite, starch, and superabsorbent polymers, and sodium-based bentonite having a particularly high swellability is preferable. Thereby, the adhesiveness with the base is improved, and as a result, the barrier performance and flame retardancy as a paint are stabilized. Moreover, since a crack becomes difficult to enter into a coating film, it is preferable.

  The water-swellable substance includes particles having a particle size of # 250 (63 μm) or more, but it is desirable to adjust the water-swellable substance so that the weight ratio is 5% or less. If the weight ratio exceeds 5%, the dispersion in the coating tends to be non-uniform, and the flame retardant layer may crack due to uneven coating when applied to the substrate.

  The water-swellable substance is added in an amount of 20 parts by weight or less, preferably 18 parts by weight or less based on 100 of water. This is because when the amount exceeds 20 parts by weight, it becomes difficult to apply uniformly and the flame retardancy varies.

(Emulsion adhesive)
The soap-free emulsion adhesive is an emulsion adhesive in which a surfactant used during emulsion polymerization is a reactive surfactant. Thereby, the intensity | strength of a coating film can be raised.

  There are no restrictions on the type of emulsion adhesive as long as it is soap-free, for example, various synthetic resins such as vinyl acetate resin, ethylene vinyl acetate resin, acrylic resin, urethane resin, silicone resin, starch, mannan, alginate, etc. It is also possible to use pastes such as natural polymer materials. In particular, an acrylic resin is preferable because it has an excellent balance of film forming property, hardness, gas permeability, and filler dispersion stability.

  The addition amount of the soap-free emulsion adhesive is 3 to 30 and 3 to 30 (preferably 5 to 25), preferably 3 to 30 with respect to the solid content 100 of the flame retardant coating composition. This is because if the amount added is less than 3, the adhesion performance becomes insufficient and the required strength of the coating film cannot be obtained, whereas if it exceeds 30, the flame retardancy cannot be satisfied.

(Other additives)
If necessary, a water-soluble polymer may be added to the flame retardant coating composition. This water-soluble polymer is added to prevent leakage of flammable gas, for example, synthetic polymer compounds such as polyvinyl alcohol and polyethylene glycol, natural polysaccharide derivatives such as carboxymethyl cellulose and hydroxyethyl cellulose, etc. Is mentioned. In particular, since the swellable inorganic compound has the property of taking moisture between the layers and swells, the water-soluble polymer penetrates between the layers of the swellable inorganic compound such as polyvinyl alcohol to form a composite, and is combustible. What expresses the gas barrier property which prevents the leak of property gas is preferable.

  The amount of the water-soluble polymer added is preferably 20% by weight or less with the total amount of the soap-free emulsion adhesive. This is because if the total of these exceeds 20% by weight, it becomes difficult to satisfy the flame retardancy.

  Furthermore, a flame retardant may be improved by adding a phosphoric acid flame retardant used in general paints. Examples thereof include ammonium phosphate, ammonium polyphosphate, sodium hexametaphosphate, and the like, which can be appropriately used depending on the application and required performance.

  Furthermore, you may add various additives, such as a pigment, a dispersing agent, an antifoamer, as needed.

(3) Method for Producing Flame Retardant Paint Composition As a method for producing the flame retardant paint composition, first, a swellable inorganic compound pulverized wet is added to water and stirred and dispersed. In this case, the swellable inorganic compound may be added after drying, or may be added in the state of a slurry at the time of pulverization. Moreover, you may add a dispersing agent suitably.

  Next, a water-swellable substance is added and sufficiently stirred and dispersed. By doing so, the viscosity of the paint becomes better. Moreover, you may add another filler and a thickener suitably.

  Further, a soap-free emulsion adhesive is added and stirred and dispersed. A dispersant, antifoaming agent, wetting agent, antifungal agent, anti-skinning agent, antioxidant, preservative, coloring agent and the like may be added as appropriate.

  Therefore, in this embodiment, since the flame retardant coating composition contains a scaly swellable inorganic compound and a soap-free emulsion adhesive, the coating composition to which the coating composition is applied is applied. It becomes a flame retardant coating composition that exhibits high flame retardant performance without degrading the physical properties and water resistance of the building substrate 1 as a coated product, and also in consideration of the environment.

  In addition, since the above swellable inorganic compound is wet pulverized using a peptizer or a dispersant to form a scale, the particle size distribution or shape of the swellable inorganic compound is stabilized and extended. Gives a flame retardant coating composition of good quality.

  Moreover, since the water-swellable substance is added to the coating composition, the adhesion as the flame-retardant coating composition is improved, and the flame retardancy and heat insulation are stabilized. Further, even when the flame retardant coating composition is applied to the surface of the building substrate 1 (the object to be coated) and the coating layer 2 is formed by drying and curing, it is difficult to form small cracks, which is preferable in terms of appearance. In addition, the barrier performance (flame retardant performance) as a coating film is stabilized.

  And since plate-like body A1 as a flame-retardant building board has the coating-film layer 2 as a flame-resistant layer by which the said flame-retardant coating composition was apply | coated to the single side | surface of the base material 1 for construction, Compared to the unpainted building board without the coating layer 2, the flame retardancy is high, or the flame retardancy and the significant effect of reducing the thermal conductivity from the heated surface to the non-heated surface (back surface) are expressed. It becomes a flame-retardant building board.

  In this embodiment, the flame retardant coating composition is applied to the surface which is one side of the building base material 1 to form the coating film layer 2, but on the back side or both sides of the building base material 1. You may form a coating-film layer with a flame retardant coating composition on a certain front and back.

(Embodiment 2)
FIG. 2 shows a second embodiment of the present invention (in the following embodiment, the same parts as those in FIG. 1 are denoted by the same reference numerals and detailed description thereof is omitted), and the plate-like body according to the first embodiment is shown. A1 is laminated with another building base material to form a multi-layered plate-like body.

  That is, the plate-like body A2 according to this embodiment is also used as a flame-retardant building board, the plate-like body A1 of the first embodiment is a core material, and the building base material 1 is the first building base material. It is said that.

  And the front side building base material 5 as a 2nd building base material is on the surface of the core material which consists of this plate-shaped body A1, and the back building base material 6 as a 2nd building base material is on the back surface, respectively. They are bonded and integrated through an adhesive such as an epoxy adhesive. The surface building base material 5 and the back building base material 6 may be the same as the first building base material 1, or different from the first building base material 1. Also good. Other configurations are the same as those of the first embodiment.

  Therefore, in this embodiment, the plate-like body A2 as the flame-retardant building board is attached to the plate-like body A1 as the core material having the first building base material 1 and the front and back surfaces thereof. 2 Since it is a thing of a several layer with the base materials 5 and 6 for front and back as a base material for construction, it becomes a high intensity | strength thing. In particular, if a building material having a higher specific gravity than the core plate A1 is used as the front and back building substrates 5 and 6, a plate A2 having a higher strength can be obtained.

(Embodiment 3)
FIG. 3 shows Embodiment 3, in which another coating layer is provided on the plate-like body A2 according to Embodiment 2 described above.

  That is, the plate-like body A3 according to this embodiment is also used as a flame-retardant building board, the plate-like body A1 of the first embodiment is a core material, and the building base material 1 is the first building base material. The coating layer 2 is a first coating layer.

  And like Embodiment 2, the front-side construction base material 5 as a 2nd construction base material is on the surface of the core material which consists of plate-shaped body A1, and the back side construction as a 2nd construction base material is on the back surface. The base materials 6 for use are bonded and integrated.

  Further, a second coating layer 7 is formed on the surface of the plate-like body A3 (the surface of the front building base material 5), and this coating layer 7 is also the same flame retardant coating as the first coating layer 2. It is formed with a composition. Other configurations are the same as those of the first embodiment.

  Therefore, also in this embodiment, the same effect as that of the second embodiment can be obtained. In addition, the first coating layer 2 on the surface of the plate-like body A1 and the second coating layer 2 on the surface of the front building base material 5 are formed as a core material on the plate-like body A3 as a flame-retardant building board. Therefore, the number of coating layers increases as compared with the plate-like body A1 of Embodiment 1, and the flame retardancy is further increased correspondingly, or the flame retardancy and the heating surface to the non-heating surface ( It becomes a flame-retardant building board that expresses a significant effect in reducing the thermal conductivity to the back surface.

  In this embodiment, the second coating layer 7 made of a flame retardant coating composition is formed only on the surface of the plate-like body A3 (surface of the front building base material 5). In addition, the 2nd coating film layer which consists of a similar flame-retardant coating composition can also be formed in the back surface (back surface of the base material 6 for back construction) of plate-shaped object A3.

(Embodiment 4)
FIG. 4 shows Embodiment 4 of the present invention, in which metal plates are laminated on the front and back surfaces of the plate-like body A3 according to Embodiment 3 described above.

  That is, the plate-like body A4 according to this embodiment is also used as a flame-retardant building board. They are laminated and integrated through an adhesive. As the metal of the metal plates 9 and 10, for example, steel, stainless steel, aluminum, copper, zinc iron plate, tinplate, or the like is used. Moreover, the thickness of the metal plates 9 and 10 is not specified, and can be changed as needed.

  Moreover, in this embodiment, the 1st building base material 1 in plate-shaped body A1 as a core material is limited to fiber boards, such as a wood fiber board and a rock wool board. Others are the same as the plate-like body A3 of the third embodiment.

  In the case of this embodiment, since the metal plates 9 and 10 are laminated and integrated on the front and back surfaces of the plate-like body A3, a high-strength plate-like body A3 capable of producing a significant effect on the decrease in thermal conductivity is obtained. can get. Moreover, the nonflammability of plate-like body A3 can be improved with the metal plates 9 and 10. FIG.

  Further, since the first building base material 1 of the plate-like body A1 as the core material is a fiber board such as a wood fiber board or a rock wool board, the plate-like body A3 is light in weight and has high heat insulation properties. Hazardous gas is not generated and fire safety is increased.

  In this embodiment, the metal plates 9 and 10 are laminated and integrated respectively on the front and back surfaces of the plate-like body A3. However, the metal plates may be laminated and integrated only on the surface of the plate-like body A3.

(Other embodiments)
In addition, in said each embodiment, although plate-like body A1-A4 in which the coating-film layers 2 and 7 by a flame-retardant coating composition are formed is an example in case of being used for a building board, it is other than this building board use. A plate-like body may be sufficient.

  Next, specific examples will be described.

Example 1
Scale-like vermiculite as a swellable inorganic compound, acrylic resin adhesive as a soap-free emulsion adhesive, sodium bentonite as a water-swellable substance, and sodium tripolyphosphate as a peptizer (dispersant) Prepared.

  Nitric acid is added to vermiculite and wet pulverization is performed with a ball mill, and the median particle size (median diameter) is 32 to 33 μm, 90% of the total particle size is 71 to 74 μm, and 10% of the total particle size is 8 to 8%. It adjusted so that it might become 10 micrometers.

  Wet pulverized scaly vermiculite was added to water and dispersed by stirring. The amount added was 40 parts by weight per 100 parts by weight of water.

  Next, the sodium-based bentonite was added and dispersed by stirring. The amount added was 20 parts by weight with respect to 100 parts by weight of water.

  Furthermore, the above-mentioned soap-free acrylic resin adhesive (solid component 50% by weight) was added to obtain a flame retardant coating composition. The added amount is 15 parts by weight of solid content with respect to 100 parts by weight of solid content of the flame retardant coating composition, and the flame retardant coating composition has a solid content of 43% and a viscosity of Ford Cup No. 4 and has a low viscosity of 42 seconds. was gotten.

Then, using a rock wool single-layer plate having a thickness of 12 mm as a base material, the obtained flame-retardant coating composition is applied to the surface (one side) of the base material at a coating amount of 300 g / m ² and dried and solidified. The flame-retardant building board (plate body) in which the coating-film layer which makes a flame-resistant layer was formed in the surface was obtained.

  An 8 mm thick calcium plate (measuring plate) is placed oppositely on the back side of this flame retardant building board, with a distance of 5 mm, and a flame of 930 ° C. on the surface side (flame retardant layer side) of the flame retardant building board And the back surface temperature of the above-mentioned calcium plate after 20 minutes was measured.

(Example 2)
By applying the above-mentioned flame-retardant coating composition on the back surface of a base material composed of a rock wool single-layer plate having a thickness of 12 mm at a coating amount of 300 g / m ² and drying and solidifying, the coating layer forming the flame-retardant layer is formed on the back surface. The flame-retardant building board (plate-shaped body) formed in was obtained.

  An 8 mm thick calcium plate (measuring plate) is placed opposite to the back side of this flame retardant building board at a distance of 5 mm, and 930 ° C. with respect to the surface side of the flame retardant building board (the side opposite to the flame retardant layer). The back surface temperature of the above-mentioned calcium plate was measured 20 minutes later.

(Example 3)
A coating layer that forms a flame retardant layer by applying the above flame retardant coating composition on the front and back surfaces of a base material composed of a rock wool single-layer plate having a thickness of 12 mm at a coating amount of 300 g / m ² and drying and solidifying the coating composition. A flame retardant building board (plate-like body) having a flame retardant layer formed on both sides was obtained.

  On the back side of this flame retardant building board, an 8 mm thick calcium plate (measuring board) is placed oppositely with a space of 5 mm, and a flame of 930 ° C. is applied to the surface side of the flame retardant building board. The back surface temperature of the said calcium plate after a minute was measured.

(Comparative example)
An 8 mm thick calcium plate (measuring plate) is placed opposite to the back side of a 12 mm thick rock wool single layer plate at a distance of 5 mm, and a 930 ° C. flame is applied to the surface side of the rock wool single layer plate itself. Then, the back surface temperature of the calcium plate after 20 minutes was measured.

  Each measured temperature of the above Examples 1-3 and a comparative example is shown in FIG. As shown in FIG. 5, when these Examples 1 to 3 are compared with the comparative example, the building board in which the flame retardant layer is formed on the front surface, the back surface, or both the front and back surfaces of the substrate does not have the flame retardant layer. A thermal barrier effect was observed compared to the one.

(Example 4)
The said Examples 1-3 confirmed the improvement of a flame retardance by changing a test method. Using a volcanic glassy multilayer board having a thickness of 12 mm and a specific gravity of 0.7 as a base material, the same flame retardant coating composition as in Example 1 is applied to the surface at a coating amount of 250 g / m ² and dried and solidified. Thus, a flame retardant building board (plate-like body) having a coating layer forming a flame retardant layer formed on the surface was obtained.

  A flame at 800 ° C. was applied to the surface side (flame retardant layer side) of the flame retardant building board, and the back surface temperature of the flame retardant building board was measured. As a result, as shown in FIG. 6A, the temperature was stable after 10 minutes and did not exceed 250 ° C.

  On the other hand, for comparison, a building board not provided with the flame retardant layer is prepared on the surface of the volcanic glassy multilayer board, and the building board is also subjected to a flame of 800 ° C. in the same manner as described above. The backside temperature of the building board was measured. As a result, after a lapse of about 5 minutes, the temperature rapidly increased to a temperature exceeding 400 ° C., so that the application of flame was stopped (see FIG. 6B). Comparing these, it can be seen that the flame retardant layer worked significantly.

(Example 5)
An insulation board (first building substrate) having a thickness of 12 mm and a specific gravity of 0.23 is used as a substrate, and the same flame retardant coating composition as in Example 1 is applied to the surface at a coating amount of 250 g / m ^2. By drying and solidifying, a flame retardant plate-like body having a coating layer forming a flame retardant layer formed on the surface was obtained. And this plate-like body is used as a core material, and a volcanic glassy multilayer board (second building base material) having a thickness of 12 mm and a specific gravity of 0.7 on the front and back surfaces, respectively, with an epoxy adhesive of 100 g / m ² . A flame retardant building board having a multilayer structure was obtained by sticking.

  A flame at 800 ° C. was applied to the surface side of the flame retardant building board (flame retardant layer side of the base material), and the back surface temperature of the flame retardant building board was measured. As a result, the temperature after 20 minutes did not exceed 100 ° C.

(Example 6)
An insulation board (first building substrate) having a thickness of 12 mm and a specific gravity of 0.23 is used as a substrate, and the same flame retardant coating composition as in Example 1 is applied to the surface at a coating amount of 250 g / m ^2. By drying and solidifying, a flame-retardant plate-like body having a coating layer (first coating layer) forming a flame-retardant layer formed on the surface was obtained. Then, this plate-like body is used as a core material, and a rock wool single-layer board (second building base material) having a thickness of 9 mm and a specific gravity of 0.23 is adhered to the front and back surfaces with an epoxy adhesive of 100 g / m ² . Thus, a multi-layered plate-like body was obtained. Furthermore, the same flame retardant coating composition as in Example 1 was applied to the surface at a coating amount of 250 g / m ² and dried and solidified, whereby the coating layer (second coating layer) forming the flame retardant surface A fire retardant building board formed in

  A flame at 800 ° C. was applied to the surface side (flame retardant layer side) of the flame retardant building board, and the back surface temperature of the flame retardant building board was measured. As a result, the temperature after 15 minutes did not exceed 100 ° C.

(Example 7)
Using a volcanic glassy multilayer board having a thickness of 12 mm and a specific gravity of 0.7 as a base material, the same flame retardant coating composition as in Example 1 is applied to the surface at a coating amount of 250 g / m ² and dried and solidified. Thus, a flame retardant plate-like body having a coating layer forming a flame retardant layer formed on the surface was obtained. A steel metal plate having a thickness of 0.3 mm was adhered to the surface of the flame retardant layer of the plate-like body with an epoxy adhesive of 100 g / m ² to obtain a two-layer incombustible building board.

  A flame of 800 ° C. was applied to the surface side (metal plate side) of this incombustible building board, and when the back surface temperature of the incombustible building board was measured, the temperature after 10 minutes was 120 ° C., and after 20 minutes had passed. It became 190 degreeC.

  On the other hand, for the sake of comparison, a building board made only of a metal plate not provided with the flame retardant layer on the surface of the volcanic glassy multilayer board is prepared, and the building board is also heated to 800 ° C. in the same manner as above. The backside temperature of the building board was measured with a flame. As a result, the temperature after 10 minutes was 140 ° C. and after 20 minutes was 220 ° C. These comparisons show that the flame retardant layer worked significantly.

(Example 8)
An insulation board (first building base material) having a thickness of 12 mm and a specific gravity of 0.25 is used as a base material, and the same flame-retardant coating composition as in Example 1 is applied to the surface at a coating amount of 250 g / m ^2. By drying and solidifying, a plate-like body having a coating layer forming a flame retardant layer formed on the surface was obtained. This plate-like body is used as a core material, and a volcanic glassy multilayer board (second building base material) having a thickness of 12 mm and a specific gravity of 0.7 is adhered to the front and back surfaces with an epoxy adhesive of 100 g / m ² . Thus, a multi-layered plate-like body was obtained. Furthermore, the same flame retardant coating composition as in Example 1 was applied to the surface of the multi-layered plate-like body at a coating amount of 250 g / m ² and dried and solidified, whereby the coating layer forming the flame retardant layer was obtained. A plate-like body formed on the surface was obtained. Then, a steel metal plate having a thickness of 0.3 mm was adhered to the front and back surfaces of the plate-like body with an epoxy adhesive of 100 g / m ² to obtain a flame retardant building board having a five-layer structure.

  A flame at 800 ° C. was applied to the surface side (flame retardant layer side) of the flame retardant building board, and the back surface temperature of the flame retardant building board was measured. As a result, the temperature rise was slow and did not exceed 100 ° C. even after 25 minutes.

  On the other hand, for comparison, a building board not provided with the flame retardant layer is prepared on the surface of the volcanic glassy multilayer board, and the building board is also subjected to a flame of 800 ° C. in the same manner as described above. The backside temperature of the building board was measured. As a result, after about 15 minutes, the temperature suddenly increased to over 300 ° C., so the application of flame was stopped. These comparisons show that the flame retardant layer worked significantly.

Example 9
A rock wool single layer board (first building base material) having a thickness of 12 mm and a specific gravity of 0.23 is used as a base material, and the same flame retardant coating composition as in Example 1 is applied to the surface at a coating amount of 250 g / m ² . Then, by drying and solidifying, a plate-like body having a coating layer forming a flame retardant layer formed on the surface was obtained. This plate-like body is used as a core material, and a volcanic glassy multilayer board (second building base material) having a thickness of 12 mm and a specific gravity of 0.7 is adhered to the front and back surfaces with an epoxy adhesive of 100 g / m ² . Thus, a multi-layered plate-like body was obtained. Furthermore, the same flame retardant coating composition as in Example 1 was applied to the surface of the multi-layered plate-like body at a coating amount of 250 g / m ² and dried and solidified, whereby the coating layer forming the flame retardant layer was obtained. A plate-like body formed on the surface was obtained. Then, a steel metal plate having a thickness of 0.3 mm was adhered to the front and back surfaces of the plate-like body with an epoxy adhesive of 100 g / m ² to obtain a flame retardant building board having a five-layer structure.

  A flame at 800 ° C. was applied to the surface side (flame retardant layer side) of the flame retardant building board, and the back surface temperature of the flame retardant building board was measured. As a result, the temperature rise was slow and did not exceed 100 ° C. even after 25 minutes.

  On the other hand, for comparison, a building board not provided with the flame retardant layer is prepared on the surface of the volcanic glassy multilayer board, and the building board is also subjected to a flame of 800 ° C. in the same manner as described above. The backside temperature of the building board was measured. As a result, the temperature exceeded 100 ° C. after about 18 minutes, and the temperature increased beyond 120 ° C. after 25 minutes. These comparisons show that the flame retardant layer worked significantly.

  INDUSTRIAL APPLICABILITY Since the present invention provides a flame retardant coating composition that does not cause a decrease in physical properties and water resistance of an object to be coated and exhibits high flame retardant performance in consideration of the environment, it is extremely useful and industrial. High availability on.

A1, A2, A3, A4 plate (flame retardant building board)
1 Building material (first building material)
2 Coating layer (first coating layer)
5 Table building base material (second building base material)
6 Back construction base material (second construction base material)
7 Second coating layer 9, 10 Metal plate

Claims (5)

A swellable inorganic compound that is pulverized wet by using a peptizer or a dispersant to form a scaly, and has SiO ₂ , MgO, or Al ₂ O ₃ as a main component and swells by taking moisture between layers ;
A water-swellable substance consisting of clay mineral, starch or superabsorbent polymer, which absorbs moisture and expands its volume ;
A flame-retardant coating composition comprising a soap-free emulsion adhesive. A plate-like body having a first coating layer on one or both sides of the first building substrate,
The said 1st coating-film layer is formed with the flame-retardant coating composition of Claim 1 , The plate-shaped object characterized by the above-mentioned. A plate-like body, wherein the plate-like body of claim 2 is used as a core material, and a second building base material is adhered to the front and back surfaces of the core material. A plate-like body, wherein a second coating layer comprising the flame-retardant coating composition of claim 1 is further provided on the surface or front and back surfaces of the plate-like body of claim 3 . A metal plate is laminated on the surface or front and back surfaces of the plate-like body of claim 4 ,
A plate-like body, wherein the first building base material in the plate-like body as a core material is a fiberboard.

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