KR102454339B1 - Foaming flame-retardant water paint composition for wood including initial fire extinguishing function - Google Patents

Abstract

The present invention relates to a foaming flame retardant water-based paint composition for wood containing an initial fire extinguishing function. More specifically, the present invention relates to a foaming flame retardant water-based paint composition for wood which contains a carbonation accelerator, a carbonation forming agent, a foaming agent, and microcapsules for fire extinguishing, so that first of all, it is possible to extinguish the fire at the beginning of the fire, suppress re-burning, and minimize damage, and thus if fire recurs due to residual flame, it is possible to minimize human damage by securing evacuation time.

Description

Foaming flame-retardant water-based paint composition for wood including fire extinguishing function of initial material {FOAMING FLAME-RETARDANT WATER PAINT COMPOSITION FOR WOOD INCLUDING INITIAL FIRE EXTINGUISHING FUNCTION}

The present invention relates to a foamable flame-retardant water-based paint composition for wood including an initial fire extinguishing function, and specifically, it includes a carbonization accelerator, a carbonization former, a foaming agent, and a microcapsule for extinguishing an initial fire. It extinguishes the fire and suppresses re-combustion by cooling. If a fire recurs due to residual flame, it delays the spread of the fire and secures evacuation time to prevent casualties and minimize property damage. It relates to a foamable flame-retardant water-based paint composition for wood comprising.

When a fire occurs in a building, it is known that the evacuation time from the site after a fire occurs is 3 minutes, and especially in the case of a building made of wood, the speed of the fire spreads out of control compared to materials such as steel or cement.

The flame retardant paint for wood is known as a functional paint that can prevent large-scale human damage by preventing the spread of flame to some extent by applying it to wood that is very vulnerable to fire as described above, thereby securing evacuation time.

With the development of firefighting industry technology, building materials or firefighting objects with potential for fire are prevented electrically, mechanically or chemically. However, fires are occurring more frequently and more frequently. Institutionally, the government legally stipulates that objects that may cause severe damage in case of fire or have difficulty in extinguishing fires are flame-retardant, or that only objects whose flame-retardant function can be used can be used.

Despite these policy efforts, many buildings are still vulnerable to high temperature heat and flame, and in places where it is almost impossible to extinguish a fire, such as a refrigerated warehouse, a place dealing with volatile substances, or an electric power outlet, the degree of fire with general flame retardant paint or flame retardant paint cannot reduce

In addition, even if there is a material with good flame resistance, it cannot block the fundamental heat, so the conducted heat causes the deformation of the object to be coated and causes an internal fire. There is a problem with car damage.

Therefore, in order to solve the above problems, when a fire occurs, the fire is first extinguished at the initial stage of the fire, and reburn is suppressed by cooling. There is a demand for the development of a flame retardant paint composition including an initial fire extinguishing function that can prevent large casualties and property damage by securing

In the present invention, when a fire occurs inside a building made of wood, when a predetermined temperature is reached at the initial stage of the fire, the extinguishing material in the composition automatically reacts to extinguish the fire and suppress reburn by cooling, It is to provide a foamable water-based paint composition for wood including an initial fire extinguishing function that can reduce damage to life and property by securing evacuation time through the flame retardant function for wood even if the fire is spread due to secondary afterflame.

In order to achieve the above object, the present invention as an embodiment includes a carbonization former, a carbonization accelerator, a foaming agent, a binder resin emulsion, and a microcapsule for extinguishing the initial material, wherein the microcapsule for extinguishing the initial material is 8 based on the entire composition It contains ~ 12% by weight, and the binder resin emulsion has a glass transition temperature (T _g ) of -10 to 10 ° C. It provides a foamable flame retardant water-based paint composition for wood.

As another embodiment of the present invention, based on the total weight of the water-based paint composition, the content of the carbonization former is 6 to 10% by weight, the content of the carbonization accelerator is 14 to 20% by weight, and the content of the foaming agent is 10 ˜16% by weight.

In another embodiment of the present invention, the carbonization forming agent may be at least one of pentaerythritol, dipentaerythritol, phenol formaldehyde, and polyurethane polyol.

As another embodiment of the present invention, the carbonization accelerator may be at least one of ammonium polyphosphate, melamine phosphate, and melamine pyrophosphate.

As another embodiment of the present invention, the microcapsule for extinguishing the initial material may have a core-shell structure.

As another embodiment of the present invention, the core part of the microcapsule contains perfluoro 2-methyl-3-pentanone and 1,1,2,2,3,3,4- heptafluoro cyclopentane (1,1,2,2,3,3,4-heptafluoro cyclopentane).

As another embodiment of the present invention, perfluoro 2-methyl-3-pentanone and 1,1,2,2,3,3,4-hepta on the core part The content ratio of fluorocyclopentane (1,1,2,2,3,3,4-heptafluoro cyclopentane) may be 1:3 to 3:1.

As another embodiment of the present invention, the shell portion of the microcapsule may include a melamine-urea-formaldehyde resin (Melamine-urea-formaldehyde resin).

As another embodiment of the present invention, the particle diameter of the microcapsules for extinguishing the initial material may be 60 ~ 80㎛.

The composition of the present invention includes a carbonization accelerator, a carbonization former, a foaming agent, and a microcapsule for extinguishing an initial material, and by controlling the weight% ratio of the carbonization former to the carbonization accelerator, extinguishing the fire at the initial stage of the fire and cooling It prevents the spread of fire and re-combustion, and if a fire recurs due to after-flame, it has the effect of minimizing the loss of large lives and property by securing an evacuation time for secondary fire spread. It has the effect of minimizing the damage of fire.

1 is a view showing a cross-sectional view of a foamable flame retardant coating film for microcapsule wood for fire extinguishing in the initial stage formed while the water-based coating composition of the present invention is cured and dried.
Figure 2 is a view showing the microcapsules contained in the foam fire retardant paint composition for wood of the present invention.
3 is a photograph showing the state over time when the cured product obtained by drying and curing the water-based paint composition of the present invention is ignited and extinguished in finely pulverized granules.
4 is a diagram showing the DSC curve of the NH microcapsule and the microcapsule change (SEM Image) according to the temperature change.

In order to fully understand the configuration and effect of the present invention, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, and may be embodied in various forms and various modifications may be made. However, the description of the present embodiments is provided so that the disclosure of the present invention is complete, and to fully inform those of ordinary skill in the art to which the present invention pertains to the scope of the invention.

The foamable flame-retardant water-based paint composition for wood of the present invention may include a carbonization former, a carbonization accelerator, a foaming agent, a binder resin emulsion, and microcapsules for extinguishing the initial material.

The carbonization forming agent included in the foamable flame-retardant water-based paint composition for wood of the present invention may be one or more of pentaerythritol, dipentaerythritol, phenol formaldehyde and polyurethane polyol, and it is preferable to use a material having low water solubility.

The carbonization forming agent included in the foamable flame-retardant water-based paint composition for wood of the present invention may be included in 6 to 10% by weight based on the total weight of the water-based paint composition. If the thermal barrier film is not sufficiently formed, the flame retardant efficiency may be lowered, and if it exceeds 10 wt%, the durability of the formed coating film may be deteriorated.

The carbonization accelerator contained in the foamable flame retardant water-based paint composition for wood of the present invention may be at least one of ammonium polyphosphate, melamine phosphate, and melamine pyrophosphate, and it is preferable to use a material having low water solubility.

The carbonization accelerator contained in the foamable flame-retardant water-based paint composition for wood of the present invention is decomposed upon exposure to heat to generate a flame-retardant gas and acid, and may act to promote the carbonization action of the binder resin and the carbonization former.

The carbonization accelerator contained in the foamable flame-retardant water-based paint composition for wood of the present invention may be included in an amount of 14 to 20% by weight based on the total weight of the water-based paint composition. When the amount is less than 14% by weight, the binder resin and A problem in which the carbonization action of the carbonization former cannot be sufficiently promoted may occur, and if it exceeds 20% by weight based on the total weight of the water-based paint composition, it may not be properly dispersed in the water-based paint composition and agglomeration during the manufacturing process of the composition This can happen.

When the foaming agent contained in the foamable flame-retardant water-based paint composition for wood of the present invention receives heat after a fire, gas is generated to cause volume expansion of the coating film, thereby increasing the thermal barrier effect. As the blowing agent, at least one of urea, melamine and polyamide may be used.

The foaming agent included in the foamable flame-retardant water-based paint composition for wood of the present invention may be included in an amount of 10 to 16% by weight based on the total weight of the water-based paint composition. This may not be sufficient, so the thermal barrier effect may be insufficient, and if it exceeds 16 wt%, a problem in which the physical properties of the coating film are deteriorated may occur.

The binder resin emulsion of the present invention may have a glass transition temperature (T _g ) of -10 to 10 ° C, preferably -5 to 5 ° C. When the glass transition temperature (T _g ) is less than -10 ° C, the hardness of the coating film is If it is too high, a problem of cracking may occur, and if it exceeds 10°C, a problem of insufficient drying may occur.

As the binder of the present invention, one or more of acryl-based, styrene-based, vinyl acetate, and ethylene-based monomers may be copolymerized. Preferably, a vinyl acetate emulsion copolymerized with vinyl acetate and an acrylic or ethylene-based monomer to improve water resistance. resins may be used.

The binder resin emulsion contained in the foamable flame-retardant water-based paint composition for wood of the present invention may be included in an amount of 20 to 30% by weight based on the total weight of the water-based paint composition. There may be a problem that the surface adhesive strength is lowered, and when it exceeds 30 wt%, there may be a problem that the component having a flame retardant and initial fire extinguishing function does not exhibit a sufficient effect.

The mixing ratio by weight of (a) carbonization accelerator, (b) carbonization former, (c) foaming agent, and (d) microcapsule for fire extinguishing initial material contained in the foamable flame retardant water-based paint composition for wood of the present invention is preferably (a) )+(b)+(c): (d) = 3.5:1~6:1, and when the value of (a)+(b)+(c) is less than 3.5 times the value of (d), Insufficient generation of flame retardant gas and insufficient formation of a thermal barrier may cause a problem in that the function to prevent fire spread may deteriorate, and the value of (a)+(b)+(c) is 6 times higher than the value of (d) If it exceeds, the weight of the microcapsule is relatively small, which may cause a problem in that the suppression of the initial material and the effect of suppressing reburn are inhibited.

As described above, by adjusting the weight range of (a) carbonization accelerator, (b) carbonization former, (c) foaming agent, and (d) microcapsule for extinguishing initial material, the effect of suppression of initial material, suppression of re-combustion and prevention of fire spread can be achieved simultaneously.

The mixing ratio by weight of the (a) carbonization accelerator, (b) carbonization former, and (e) binder resin emulsion contained in the foamable flame retardant water-based paint composition for wood of the present invention is preferably (a) + (b): (e) ) = 0.7:1 to 1:1, and when the value of (a)+(b) is less than 0.7 times the value of (e), There may be problems that the generation and formation of a thermal barrier film are not sufficient, and if the value of (a)+(b) is larger than the value of (e), the physical properties such as lowering of adhesion and cracking of the formed coating film are lowered. Problems can arise.

1 is a view showing a cross-sectional view of a foamable flame retardant coating film for microcapsule wood for fire extinguishing in the initial stage formed while the water-based coating composition of the present invention is cured and dried.

Figure 1a shows the state before curing and drying by applying the N-H micro extinguishing capsule 10 and the foamable coating composition 20 for the initial fire extinguishing to the object 30 to be coated.

Figure 1b shows the microcapsule layer for initial fire extinguishing (10a) and the foamable flame retardant coating film layer (20a) respectively sequentially formed by the above particles.

The water-based paint composition of the present invention may have a microcapsule layer for initial fire extinguishing (10a) on top of the coating film while curing, and a foamable flame retardant coating film layer (20a) below it may be arranged.

As the water-based paint composition of the present invention is cured and dried, the microcapsule layer for initial fire extinguishing (10a) may be located on the top of the coating film. The composition is directly sprayed on the flame, which has the effect of quickly responding to the initial fire.

While the water-based paint composition of the present invention is cured and dried, the foamable flame retardant paint composition including the carbonization former, the carbonization accelerator, the foaming agent and the binder resin emulsion due to the difference in specific gravity may be relatively disposed below the microcapsule layer.

More specifically, when the foamable flame retardant paint film layer includes a first surface in contact with the object to be coated, and a second surface opposite to the first surface (the lower surface of the microcapsule layer), the microcapsule layer responds to digestion of the core. By efficiently discharging substances, the initial fire can be extinguished efficiently, the foaming flame retardant coating film layer suppresses re-combustion, and the carbide or thermal barrier film can be quickly formed to effectively suppress the after-flame.

As the water-based paint composition of the present invention cures, a microcapsule layer for initial fire extinguishing (10a) may be formed on the top of the coating film. This may mean that the microcapsule layer 10a for initial fire extinguishing has been formed, and since a large amount of microcapsules is located on the top of the coating film as described above, it is possible to effectively suppress the initial fire when a fire occurs.

The water-based paint composition of the present invention can form a foamable flame-retardant paint film layer 20a under the microcapsule layer 10a while curing, which is a carbonization accelerator, carbonization blood agent, and foaming agent included in the water-based paint composition of the present invention. It may mean that 70% or more of the weight is located below the microcapsule layer 10a and thus the foamable flame retardant paint film layer 20a having flame retardant performance is formed, and includes a carbonization accelerator, a carbonization former and a foaming agent as described above. Since a large amount of the flame-retardant component is located just below the microcapsule layer 10a, it is possible to suppress the initial fire and prevent the recurrence of the fire due to after-flame.

Therefore, as described above, the content of the microcapsule for fire extinguishing and the content of the carbonization forming agent, carbonization accelerator, and foaming agent particles for fire protection are appropriately adjusted, and the coating film forms the same layer after curing and drying, thereby extinguishing the fire at the initial stage of the fire. This has the effect of preventing the spread of fire and re-combustion, and minimizing the recurrence of fire due to after-flame.

2 is a view showing a cross-section of a microcapsule included in the foamable flame retardant paint composition for wood of the present invention.

The water-based paint composition of the present invention may include fire extinguishing microcapsules for initial fire extinguishing, and the fire extinguishing microcapsules may be configured in a form including a core-shell structure, as shown in FIG. 2 .

In the case of the microcapsule of the present invention having a core-shell structure, the fire extinguishing composition, which is a material in the microcapsule, is discharged to the outside to extinguish the fire in the initial stage.

Specifically, when a fire occurs, the extinguishing composition may be vaporized and expanded by heat, but it does not react (rupture, leak) due to the durability and airtightness of the shell part, and in case of a fire, it self-responds to a temperature of 120 to 220 ° C. The fire extinguishing composition directly sprays on the flame to extinguish the fire by breaking the chain reaction with fuel (flammables), oxygen (air), heat (ignition source), and heat (ignition source) during the chain reaction, which are the four conditions of combustion. It can be cooled from 800°C to 30°C within 15 seconds to suppress re-combustion.

The microcapsule according to this embodiment of the present invention includes a micro-sized shell portion and a fire extinguishing composition on the core portion located inside the shell portion.

The shell part can be formed of a thermoplastic resin that can be melted or broken when a fire occurs so that the melting point is self-sensitive at 120 to 220 ° C. And it is possible to suppress reburn by cooling from 800°C to 30°C within 15 seconds.

Specifically, the shell portion is preferably made of a non-porous polymer in order to perform a self-sensitization role by a temperature reaction. For example, polyurethane resin, polyurea resin, polyamide resin, polyester resin, polycarbonate resin, aminoaldehyde resin, melamine resin, polystyrene resin, styrene-acrylate copolymer resin, styrene-methacrylate copolymer resin , gelatin, polyvinyl alcohol, phenol formaldehyde resin and resorcinol formaldehyde resin may be provided including one or more selected from the group consisting of.

More preferably, the shell portion may be configured to include a melamine-urea-formaldehyde resin, wherein the melamine-urea-formaldehyde resin has a temperature-sensitive characteristic. Excellent fire extinguishing effect at the initial stage of fire can be obtained by sensitively self-responding at a temperature in the range of 220°C, destroying the shell and allowing the extinguishing material to be sprayed.

The shell portion forms the outline of the microcapsule.

On the other hand, although the embodiment of the present invention discloses an example in which the shell portion is formed in a spherical shape, it is not limited thereto. For example, the shell portion may be formed in the form of a tube, and the extinguishing composition may be embedded in the closed space inside the shell portion in the form of a tube.

A fire extinguishing composition may be included in the core part present on the inside of the shell part.

The extinguishing composition of the present invention is perfluoro 2-methyl-3-pentanone (perfluoro 2-methyl-3-pentanone) and 1,1,2,2,3,3,4-heptafluoro cyclopentane ( 1,1,2,2,3,3,4-heptafluoro cyclopentane).

The perfluoro 2-methyl-3-pentanone (perfluoro 2-methyl-3-pentanone) and 1,1,2,2,3,3,4-heptafluoro cyclopentane (1,1,2, 2,3,3,4-heptafluoro cyclopentane) has excellent storage stability inside the shell and can show effective injection efficiency when released to the outside of the shell.

On the other hand, the perfluoro 2-methyl-3-pentanone (perfluoro 2-methyl-3-pentanone) and 1,1,2,2,3,3,4-heptafluoro cyclopentane (1,1, 2,2,3,3,4-heptafluoro cyclopentane) is preferably mixed in a ratio of 1:3 to 3:1.

When the ratio of perfluoro 2-methyl-3-pentanone to 1,1,2,2,3,3,4-heptafluoro cyclopentane is less than 1:3, extinguishing ability and extinguishing material in the core of the shell storage stability of There may be a problem that the anti-reburn effect of the extinguishing material in the shell core is lowered.

It is preferable that the particle size of the microcapsule for digestion of the present invention is adjusted to 60-80㎛.

When the particle diameter of the microcapsule is less than 60 μm, the particle diameter of the capsule becomes small and there may be difficulties in the process of applying it to a specific part of the surface to be coated. There may be a problem in that it does not exhibit fast reactivity according to the

Meanwhile, if necessary, the microcapsule of the present invention may have a structure in which a double shell surrounds the core, not the single core-shell structure as described above.

Specifically, the microcapsule for digestion of the present invention may be composed of a core part, a primary shell part surrounding the core and made of gelatin, and a secondary shell part surrounding the primary shell part and made of melamine.

When the microcapsule is manufactured with the double shell structure as described above, it is possible to provide a capsule having excellent compatibility with the paint and solvent resistance when manufacturing the fire extinguishing paint, and the particle size distribution is narrow, so that the capsule has a uniform particle size.

On the other hand, based on the total weight of the water-based paint composition of the present invention, the microcapsule for extinguishing the initial material may be included in an amount of 8 to 12% by weight.

When adjusted within this content range, physical properties such as durability, heat resistance, and stain resistance of the formed coating film can be optimally adjusted. In the case of being included, the coating workability deteriorates due to an increase in viscosity, the durability of the dried coating film is deteriorated, and it may be inappropriate in terms of manufacturing cost.

In particular, the content of the microcapsule for extinguishing the initial fire and the content of the carbonization former and carbonization accelerator for forming carbide or thermal barrier film are appropriately adjusted, thereby effectively extinguishing the initial fire, suppressing reburn, and preventing afterflame generated later. Also, it is possible to prepare a composition capable of rapidly forming a carbide or thermal barrier film.

3 is an actual photograph showing the state over time when the cured product obtained by drying and curing the water-based paint composition of the present invention is ignited and extinguished in finely pulverized granules, where 3a is before ignition (0 seconds), 3b denotes a state after 4 seconds, 3c after 8 seconds, and 3d after 15 seconds.

The granules are burned and ignited until 8 seconds after ignition, and then gradually extinguished after 8 seconds, showing a tendency to be completely extinguished after 15 seconds. It reaches and senses this temperature (self-temperature response), melts and bursts within 8 seconds, and the extinguishing material in the core is sprayed. can be seen as showing

4 is a diagram showing a differential scanning calorimetry (DSC) curve of the N-H microcapsule and the microcapsule change (SEM Image) according to temperature change.

In the vicinity of 72 ℃, the microcapsules exist in a spherical shape, but in the vicinity of 150 ℃, it is temperature-sensitive and it is confirmed that the shell part is in a ruptured form. could see that

Hereinafter, specific examples are provided to help the understanding of the present invention. However, the following examples are provided only for easier understanding of the present invention, and the content of the present invention is not limited by the examples.

The constituent materials and functions or characteristics of the foamable flame retardant water-based paint composition for wood of the present invention are described in [Table 1], and the composition ratios of Examples and Comparative Examples 1 to 3 are respectively described in [Table 2] below.

NO constituent function or characteristic One water (H ₂ O) viscosity control 2 propylene glycol Winter storage stability as a cryostabilizer 3 BYK-190 hydrophilic dispersant 4 Potassium tripolyphosphate Excellent flame retardant hydrophilic dispersant 5 BIOCIDE 3300N(fungicide) The function of enhancing storage properties as a preservative 6 NATRASOL 250HR (hydroxy ethyl cellulose) thickener 7 TiO ₂ (titanium dioxide) white pigment 8 coalescing agent texanol ST-100 A role of lowering the minimum film forming temperature (MFFT) by lowering the glass transition temperature (T _g ) as a coating film forming aid 9 melamine pyrophosphate It is a carbonization accelerator that decomposes when exposed to a heat source to generate flame-retardant gas and acid, and promotes the carbonization action of binders and carbonization formers. 10 dipentaerithritol When exposed to a heat source as a carbonization former, it reacts with the carbonization accelerator, which is an acid catalyst, to form carbides and acts to form a thermal barrier. 11 melamine By generating gas as a foaming agent, it increases the thermal barrier effect by causing volume expansion of the coating film. 12 vinyl acetate emulsion Acts as a binder, NV 45~50%, glass transition temperature (T _g ) -5~5℃ 13 Silicone defoamer Removes foam with an antifoaming agent Free of volatile organic compounds (VOCs) 14 pH regulator Maintain pH 4~6 to prevent hydrolysis during storage 15 N-H-microcapsule for initial re-digestion When the initial fire occurs, when it reaches 120℃ due to thermal runaway, the temperature is sensed and the shell is broken, so that the extinguishing material is diffused within 8 seconds to suppress the diffusion of the initial fire, cooled from 800℃ to 30℃ within 15 seconds, and burned again suppress

NO constituent Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 One water (H ₂ O) 13.0 19.3 18.8 15.2 2 propylene glycol 0.3 0.3 0.3 0.3 3 BYK-190 0.3 0.3 0.3 0.3 4 Potassium tripolyphosphate 0.5 0.5 0.5 0.5 5 BIOCIDE 3300N(fungicide) 0.2 0.2 0.2 0.2 6 NATRASOL 250HR (hydroxy ethyl cellulose) 1.0 One One One 7 TiO ₂ (titanium dioxide) 8.7 10.7 10.7 10.7 8 coalescing agent texanol ST-100 1.0 One One One 9 melamine pyrophosphate 16.8 12 17.8 17.8 10 dipentaerithritol 8.3 4 4 8.3 11 melamine 13.3 13.3 8 13.3 12 vinyl acetate emulsion 26.0 26.7 26.7 26.7 13 Silicone defoamer 0.3 0.4 0.4 0.4 14 pH regulator 0.3 0.3 0.3 0.3 15 N-H-microcapsule for initial re-digestion 10.0 10 10 4

[Example 1]

1. In a high-speed tank mixer, the components 1 to 5 and 8 of [Table 2] were weighed and put in according to the mixing ratio, and stirred for 5 minutes at a speed of 300 rpm through a 15HP continuously variable stirrer having an impeller diameter of 33 cm.

2. The stirring process of 1 was carried out for 5 minutes, and it was confirmed that the component 6 of [Table 2] was completely dissolved while continuously stirring at a speed of 450 rpm through the continuously variable agitator for 10 minutes while slowly adding [Table 2] ], the specified composition ratio of the component 7 was divided into three times and slowly added, stirred at a speed of 900 rpm through the continuously variable stirrer for 30 minutes, and the presence or absence of particles was checked using a 60 μm applicator on a glass plate with a particle size of NS5 or more Confirmed.

3. After slowly adding the component 9 of [Table 2], the mixture was stirred for 20 minutes at a speed of 900 rpm through the continuously variable stirrer, and the uniform state of the particle-free coating film was confirmed using a 60 μm applicator on a glass plate. did.

4. After slowly adding 1/2 of the composition ratio of the constituent material 12 of [Table 2] and stirring at a speed of 500 rpm for 20 minutes through the continuously variable stirrer, the constituent materials 10 and 12 of [Table 2] are also slowly added together , The uniform state of the coating film without particles was confirmed by using a 60㎛ applicator on a glass plate.

5. The remaining 1/2 of the composition ratio of the component 12 of [Table 2] was slowly added and stirred for 10 minutes at a speed of 500 rpm through the continuously variable stirrer.

6. While continuously maintaining the speed of 500rpm through the continuously variable speed stirrer, 1/2 of the composition ratio of constituent material 13 in [Table 2] and constituent material 14 were stirred for 10 minutes, and defoaming the coating film using a 60㎛ applicator on a glass plate The status was checked.

7. While continuously maintaining the speed of 500 rpm through the continuously variable stirrer, the constituent material 15 of [Table 2] was slowly added and stirred for 15 minutes, and a particle-free coating film was uniformly formed using a 90 μm applicator on a glass plate. The status was checked.

8. While continuously maintaining the speed of 500rpm through the continuously variable speed stirrer, the remaining 1/2 of the composition ratio of the constituent material 13 in [Table 2] was added and stirred for 10 minutes, then the continuously variable speed stirrer was stopped, and the glass plate was 90 The uniform state of the coating film without particles was confirmed using a μm applicator.

9. By checking the viscosity and specific gravity of the coating film, it was confirmed that it was within the product specifications.

[Comparative Example 1]

Steps 1 to 9 of the above Examples were performed by varying the composition ratios of the constituent materials 9 and 10 in [Table 2].

[Comparative Example 2]

Steps 1 to 10 of the above Examples were performed by varying the composition ratios of the constituent materials 10 and 11 in [Table 2].

[Comparative Example 3]

Steps 1 to 10 of the above Examples were performed by varying the composition ratio of the constituent material 15 in [Table 2].

[Test Example 1]

<Conditions for forming dry film>

The compositions of Example 1 and Comparative Examples 1 to 3 were applied to one surface of the object to be coated under the conditions of Table 3 below and dried to form a dry coating film. Here, for the object to be coated, KS F 3101 ordinary plywood with a thickness of 1.2mm, a width of 200mm, and a length of 250mm was used.

Condition unit Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 Dry Film Thickness (DFT) μm 100 100 100 100 number of coats episode 2 2 2 2 drying time Dry to touch min 20 20 20 25 hardening drying min 60 60 60 75 Flame-resistant area m2/l 7.5 6.5 5.7 5

<Measurement of flame retardancy and fire extinguishing performance after dry film formation>

It is made of a plastic material with a width of 160mm, a length of 210mm, and a height of 210mm, and the burner was fixed and ignited in the shape of a square cylinder with an open top.

After the one surface on which the dry coating film of Example 1 is formed is closed by covering the open upper surface so that the flame of the burner is in contact with the one surface, the flame of the burner is sealed as shown in [Table 4] below. , time and carbonization area were measured.

The comparative examples 1 to 3 were also measured in the same manner as described above.

- Initial fire extinguishing self-sensitization temperature: The temperature at which the microcapsule responds when the burner flame is sealed.

- Initial extinguishing time: The time from when the microcapsule reacts after ignition to the moment when the flame (flame) disappears and the first smoke is generated

- Reburn suppression time: time when no smoke is generated after the flame is extinguished

performance item unit Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 Flame-retardant performance Afterflame time/less than 10 seconds
(how long the flame lasts) sec 3 15 23 10 Remaining time/less than 30 seconds
(Time until combustion stops) sec 8 19 26 12 Carbonization area/Standard 50cm2 (the area burned by the flame) cm2 16.5 53 60 24 Carbonization length/standard 20cm
(length burned by flame) cm 5.2 22 31 15 Initial extinguishing self-sensitization temperature
(shell burst temperature) ℃ 150 235 260 not measurable Initial digestion time sec 4-5 11 13 The flame gets smaller and then gets bigger again. Reburn suppression time (cooling from 800℃ to 30℃) sec 11 26 32 impossible

In Comparative Example 1, the content of the carbonization accelerator was less than 14% by weight, the content of the carbonization former was less than 6% by weight, and the ratio of the binder resin emulsion to the weight of the carbonization accelerator and the carbonization former was less than 0.7. .

In the case of Comparative Example 1, it was confirmed that the flame retardant performance was significantly lowered compared to Example 1, and it was confirmed that the performance related to the initial digestion was also reduced.

In Comparative Example 2, the ratio of the weight of the carbonization accelerator, the carbonization former, and the foaming agent to the weight of the microcapsule for extinguishing the initial material was less than 3.5, and the content of the carbonization former was less than 6% by weight.

In the case of Comparative Example 2, it was confirmed that the flame retardancy performance was significantly lowered compared to that of Example 1, and it was confirmed that the performance related to the initial digestion was also reduced.

In Comparative Example 3, the ratio of the weight of the carbonization accelerator, the carbonization former and the foaming agent to the weight of the microcapsule for extinguishing the initial material was 6 or more, and the ?t amount of the microcapsule for extinguishing the initial material was less than 5% by weight. to be.

In the case of Comparative Example 3, it was confirmed that the flame retardancy performance was significantly lower than that of Example 1, and it was impossible to measure the sensitized temperature in the measurement related to the initial fire extinguishing, and the fire time could not be measured because the flame became smaller and then increased again. , it was impossible to measure the reburn suppression time.

That is, it was confirmed that, through the water-based paint composition of Example 1 of the present invention, it was possible to form a dry coating film having excellent fire suppression performance compared to Comparative Examples 1 to 3 while satisfying the criteria for flame-retardant performance. This shows the effect of extinguishing the fire at the initial stage of the fire and preventing the spread of the fire by cooling and the recurrence of the secondary fire due to the afterglow.

10: NH microdigestion capsule for initial digestion
20: foamed flame retardant composition
30: target
40: Foaming fire retardant paint film for wood including microcapsules for initial fire extinguishing
10a: microcapsule layer for initial digestion
20a: foaming flame retardant paint film layer
70: microcapsule core for initial digestion
80: microcapsule shell portion for initial digestion

Claims (8)

In the foamable flame-retardant water-based paint composition for wood,
(a) a carbonization accelerator, (b) a carbonization former, (c) a foaming agent, (d) a microcapsule for extinguishing an initial material having a core-shell structure, and (e) a binder resin emulsion,
The mixing ratio by weight of the materials is (a) + (b) + (c): (d) = 3.5:1 to 6:1,
The (a) carbonization accelerator is at least one of ammonium polyphosphate, melamine phosphate and melamine pyrophosphate,
(b) the carbonization former is at least one of pentaerythritol, dipentaerythritol, phenolformaldehyde and polyurethane polyol;
(d) The microcapsule for extinguishing the initial material having a core-shell structure prevents the initial fire by self-temperature responsiveness at a temperature of 120 to 220 °C,
The core portion of the microcapsule is perfluoro 2-methyl-3-pentanone and 1,1,2,2,3,3,4-heptafluoro cyclopentanone (1 ,1,2,2,3,3,4- heptafluoro cyclopentane),
The shell portion of the microcapsule includes a melamine-urea-formaldehyde resin,
The (e) binder resin emulsion is a foamable flame-retardant water-based paint composition for wood in which at least one of acrylic, styrene, vinyl acetate, and ethylene-based monomers are copolymerized. According to claim 1,
Based on the total weight of the water-based paint composition,
The content of the (a) carbonization accelerator is 14 to 20% by weight,
(b) the content of the carbonization former is 6 to 10% by weight,
(c) the content of the blowing agent is 10 to 16% by weight,
The (d) foamable flame-retardant water-based paint composition for wood, wherein the content of microcapsules for extinguishing the initial material is 8 to 12% by weight. According to claim 1,
The mixing ratio by weight of the above materials is (a) + (b): (e) = 0.7:1 to 1:1 for a foamable flame-retardant water-based paint composition for wood. delete delete delete According to claim 1,
Perfluoro 2-methyl-3-pentanone and 1,1,2,2,3,3,4-heptafluoro cyclopentanone (1,1) on the core ,2,2,3,3,4-heptafluoro cyclopentane) in a weight ratio of 1:3 to 3:1, characterized in that the foamable flame-retardant water-based paint composition for wood. delete

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