WO2024111871A1 - Fire-extinguishing paint composition for extinguishing initial fire at local equipment in utility tunnel - Google Patents

Abstract

The present invention relates to a fire-extinguishing paint composition for extinguishing an initial fire at local equipment in a utility tunnel. The composition of the present invention extinguishes a fire early by auto-sensing a flame temperature of 120-350 °C at an early stage of a fire in a utility tunnel, and prevents fire spread and reburning, and thus has the effect of minimizing fire damage.

Description

Fire extinguishing paint composition for initial fire extinguishing of local equipment in common areas

The present invention relates to a fire extinguishing paint composition for initially extinguishing fires in local equipment.

In accordance with the National Land Planning and Utilization Act, the communal district is intended to improve aesthetics, preserve road structures, and facilitate smooth traffic flow by jointly accommodating underground facilities such as electricity, gas, and water supply facilities, communication facilities, and sewerage facilities. refers to facilities installed underground for this purpose.

Since the utility outlet contains many major facilities such as power generation room, substation room, transmission room, transformer room, switchboard room, communication equipment room, and computer equipment room, it is a space with a high need to prevent initial fire spread and re-combustion.

Firefighting equipment installed in utility outlets can be generally divided into fire detection systems such as constant temperature detectors, photoelectric smoke detectors, and differential detectors, fire prevention systems such as sprinkler equipment, fire doors, and combustion prevention paints, and fire suppression systems such as powder fire extinguishers. there is.

In the case of a fire detection system, it only displays the location of the fire source to the central control room when a fire occurs and has no other function. In the case of a fire prevention system, it has a partial blocking effect, but the actual effect is not significant when looking at the entire utility area, and it is a part of the fire suppression system. Considering that powder fire extinguishers are manual and cannot be accessed by humans in the event of an actual communal fire, there is a problem of limited use. In addition, each system is separately configured and operated individually, making it difficult to quickly extinguish the initial fire.

Accordingly, there is a need for a paint composition that contains a high concentration of a self-temperature sensitive fire extinguishing agent at an appropriate level, so that it can suppress the fire more quickly and minimize damage by exhibiting a fire extinguishing effect without human access when an initial fire occurs.

The purpose of the present invention is to be able to paint local areas (transformers, communication cables, etc.) within the utility port without being limited to any material, and to contain a high concentration of self-temperature sensitive fire extinguishing material at an appropriate level, so that when an initial fire occurs, it is effective in extinguishing fire without human access. The aim is to provide a fire extinguishing paint composition for initial fire extinguishment of local equipment in common tunnels that can extinguish fires more quickly and minimize damage.

In order to achieve the above object, the present invention provides a fire extinguishing paint composition for extinguishing an initial fire in a local facility.

Hereinafter, the present invention will be described in more detail.

One aspect of the present invention is a fire extinguishing agent for local equipment, comprising 15 to 20% by weight of microcapsules for initial fire extinguishing of a core-shell structure that are self-temperature sensitive at a temperature of 120 to 350 ° C., based on the total weight of the fire extinguishing paint composition. It relates to a paint composition.

The microcapsule for extinguishing an initial fire may be configured in a form including a core-shell structure, as shown in FIG. 1.

In the case of the microcapsule of the present invention, the fire extinguishing agent in the core portion of the microcapsule is discharged to the outside and is used to initially extinguish a fire.

Specifically, in the event of a fire, the fire extinguishing composition may evaporate and expand due to heat, but does not rupture/leak due to the durability and airtightness of the shell portion, but bursts in response to a flame temperature of 120C to 350℃ in the event of a fire. As a result, the fire extinguishing composition in the vaporized core sprays directly on the flame, breaking the four conditions of combustion: fuel (combustibles), oxygen (air), heat (ignition source), and heat (ignition source) and chain reaction, thereby preventing fire. can be extinguished, and re-combustion can be suppressed by cooling from 800℃ to 30℃ within 15 seconds.

The microcapsule of the present invention includes a micro-sized shell portion with a closed space formed therein, and a fire extinguishing composition on the core portion located inside the shell portion.

The shell part forms the appearance of a microcapsule, and when a fire occurs and reaches 120-350°C due to thermal runaway, it self-reacts to this temperature and melts and bursts within 8 seconds, causing the extinguishing agent in the core part to be sprayed. It can be formed from thermoplastic resin.

Preferably, the shell portion may be made of a non-porous high molecular weight polymer in order to function in response to temperature. Examples of the non-porous polymers include polyurethane resin, polyurea resin, polyamide resin, polyester resin, polycarbonate resin, aminoaldehyde resin, melamine resin, polystyrene resin, styrene-acrylate copolymer resin, and styrene-methacryl. One or more types selected from late copolymer resin, gelatin, polyvinyl alcohol, phenol formaldehyde resin, and resorcinol formaldehyde resin can be used.

More preferably, melamine-urea-formaldehyde resin can be used. The melamine-urea-formaldehyde resin has sensitive temperature sensitivity, and is sensitive to temperatures in the range of 120 to 350°C. By self-sensing, the shell is destroyed and extinguishing substances are sprayed, excellent fire extinguishing effects can be achieved in the early stages of a fire.

In one embodiment of the present invention, a fire extinguishing composition may be included in the core portion present inside the shell portion.

The fire extinguishing composition includes perfluoro 2-methyl-3-pentanone and 1,1,2,2,3,3,4-heptafluoro cyclopentane (1,1 , 2,2,3,3,4-heptafluoro cyclopentane), and the above two extinguishing substances have excellent storage stability inside the shell and can exhibit effective spray efficiency when released outside the shell.

In one embodiment of the present invention, the perfluoro 2-methyl-3-pentanone and 1,1,2,2,3,3,4-heptafluoro cyclopentane are 1:3 to 3:1. It can be used by mixing at a ratio of , preferably at a ratio of 1:1.

When the ratio of perfluoro 2-methyl-3-pentanone and 1,1,2,2,3,3,4-heptafluoro cyclopentane is less than 1:3, fire extinguishing ability and extinguishing substances in the core of the shell Problems may arise with storage stability.

The average particle diameter of the microcapsule for extinguishing the initial fire is preferably adjusted to 0.5 to 0.9 mm. If the particle diameter is less than 0.5 mm, the self-sensing performance for a flame temperature of 120 to 350 ° C is the same, but the fire extinguishing ability may be insufficient, If it exceeds 0.9mm, there may be difficulties in the process of applying it to a specific area on the surface of the object.

In one embodiment of the present invention, the microcapsules for extinguishing an initial fire may be included in an amount of 15 to 20% by weight based on the total weight of the paint composition.

If the content of the microcapsules for initial fire extinguishing is less than 15% by weight, a problem may occur in which the initial fire extinguishing effect of local equipment in the common hole is insufficient, and if it exceeds 20% by weight, paint workability deteriorates due to an increase in paint viscosity and drying. There is a risk that the durability of the coating film may decrease.

Figure 2 is a diagram showing the differential scanning calorimetry (DSC) curve of the microcapsule for extinguishing an initial fire and the microcapsule change (SEM Image) according to temperature change. At around 72°C, the microcapsule exists in a spherical shape. However, by confirming that the shell part exists in a ruptured form through temperature sensitivity around 150℃, it can be seen that the extinguishing agent in the core can be sprayed in the response temperature range of 120~350℃.

The fire extinguishing paint composition of the present invention may further include an aqueous epoxy emulsion and a ceramic-based inorganic filler.

First of all, paint is composed of a binder, solvent, pigment, and additives. Among these, the binder forms a film after painting, determines the appearance such as gloss and hiding power, spreads the pigment evenly, and ensures smooth adhesion. It plays a role.

The fire extinguishing paint composition of the present invention may include an aqueous epoxy emulsion as a binder, and the aqueous epoxy emulsion may be one or more binders selected from acrylic emulsion, phenol novolac emulsion, water dispersion urethane resin (PUD), and epoxy modified emulsion. It may be an epoxy-modified emulsion, but is not limited thereto.

The epoxy-modified emulsion is prepared by, for example, reacting a bisphenol A epoxy resin with an aliphatic unsaturated fatty acid to prepare an epoxy ester-type modified epoxy resin, crosslinking diisocyanate with a surfactant, and then adding water and a hydrophilic solvent dropwise. It may be a one-component water-based epoxy emulsion.

Unlike the two-component amine epoxy resin, the one-component water-based epoxy emulsion does not require a hardener, cures naturally at room temperature, has a fast drying time, and is eco-friendly with excellent physical properties such as adhesion, water resistance, corrosion resistance (rust prevention), chemical resistance, and workability. It is a binder with the characteristics of a glass transition temperature (TG) of 1~5℃, non-volatile content (NV) of 50±1%, viscosity of 700~1200cps, PH of 6~8, and nonionic properties.

In one embodiment of the present invention, the aqueous epoxy emulsion may be included in an amount of 30 to 40% by weight, preferably 32 to 35% by weight, based on the total weight of the paint composition.

If the content of the water-based epoxy emulsion is 30% by weight or less, the viscosity increases, making it difficult to raise the paint film with a brush or roller during painting, and if the content is 40% by weight or more, the viscosity is low and the wet film may flow during painting.

The water-based epoxy emulsion is an environmentally friendly binder with volatile organic compounds (VOCs) emissions lower than 0.0076 g/L.

The fire extinguishing paint composition of the present invention may include a ceramic-based inorganic filler to provide dry film adhesion, fire resistance performance, flame retardancy, etc., and the ceramic-based inorganic filler is a hollow product obtained by foaming molten alumina, zirconium silicate, and igneous rock at high temperature. A mixture of sieve, fused silica, and zinc phosphate may be used, but is not limited thereto.

In one embodiment of the present invention, the ceramic-based inorganic filler may be included in an amount of 12 to 35% by weight based on the total weight of the paint composition.

In one embodiment of the present invention, the fire extinguishing paint composition may contain 2 to 7% by weight of fused alumina with a particle size of 45㎛ and a softening point of 2,050°C as a ceramic-based inorganic filler to improve adhesion and fire resistance. It may contain, preferably 5% by weight.

In one embodiment of the present invention, the fire extinguishing paint composition contains 2 to 7 weight of zirconium silicate with a particle size of 45㎛ and a softening point of 2,050°C as a ceramic-based inorganic filler to improve adhesion, fire resistance, and durability. %, preferably 5% by weight.

If the content of the fused alumina or zirconium silicate is less than 2% by weight, fire resistance performance is reduced, and if it exceeds 7% by weight, the PVC (pigment volume content) increases and adhesion is reduced.

In one embodiment of the present invention, the fire extinguishing paint composition is made by foaming special igneous rock generated during a volcanic eruption with a particle size of 60-80㎛ and a softening point of 1,800°C at high temperature as a ceramic-based inorganic filler to improve heat insulation, condensation prevention, and fire resistance. It may contain 5 to 10% by weight of the hollow body (MSD600), preferably 7% by weight.

If the content of the hollow body obtained by foaming the igneous rock at high temperature is less than 5% by weight, the insulation and anti-condensation performance are reduced, and if it exceeds 10% by weight, the viscosity increases, which reduces workability, and the PVC content increases, which reduces adhesion.

In one embodiment of the present invention, the fire extinguishing paint composition may contain 0.5 to 3% by weight of fused silica (K-300) as a ceramic-based inorganic filler for thermal insulation, improved fire resistance, anti-settling, and storage stability. It may contain, preferably 1.5% by weight.

If the content of the fused silica is less than 0.5% by weight, storage stability is reduced due to reduced anti-settling properties, and if it exceeds 3% by weight, there is a problem in that dispersibility is reduced during stirring.

In one embodiment of the present invention, the fire extinguishing paint composition may contain 2 to 7% by weight of zinc phosphate as a ceramic-based inorganic filler to improve rust prevention, adhesion, durability, and flame retardancy, and preferably 4.5% by weight. It can be included.

If the zinc phosphate content is less than 2% by weight, rust prevention, adhesion, durability, and flame retardancy are reduced, and if it exceeds 7% by weight, PVC increases and adhesion deteriorates.

In addition, the coating composition of the present invention contains 1% by weight of a freezing stabilizer, 0.3% by weight of a fluorine-based surfactant (dispersant), 0.5% by weight of a wetting, dispersing and leveling agent, 0.3% by weight of a thickener, 1.2% by weight of a corrosion inhibitor, and 4% by weight of a film forming agent. , 8% by weight of white pigment, 0.5% by weight of preservative, 2% by weight of paint film anti-fouling agent, 0.3% by weight of pH adjuster, 0.2% by weight of antibacterial agent, and 0.5% by weight of antifoaming agent.

When the coating composition of the present invention is cured, the microcapsule layer for initial fire extinguishing may be arranged at the top of the paint film, and the ceramic-based inorganic filler layer may be arranged below it, and as it cures and dries, the microcapsule layer for initial fire extinguishing may be located at the top of the paint film. By being located at the top as described above, when a fire occurs, the microcapsules quickly self-sensitize the temperature and the vaporized composition is sprayed directly into the flame, which has the effect of quickly responding to the initial fire.

The present invention relates to a fire extinguishing paint composition for extinguishing an initial fire in local equipment in a common pit. The composition of the present invention extinguishes the fire at an early stage by self-sensitizing the flame temperature of 120 to 350 ° C at the beginning of the fire in the common pit and prevents fire spread and re-combustion. This has the effect of minimizing fire damage.

Figure 1 is a view showing a cross-section of a microcapsule for extinguishing an initial fire with a core-shell structure included in the fire extinguishing paint composition of the present invention.

Figure 2 is a diagram showing the DSC curve of microcapsules for extinguishing an initial fire with a core-shell structure included in the fire extinguishing paint composition of the present invention and the microcapsule change (SEM Image) according to temperature change.

Figure 3 is a diagram showing a method for measuring fire extinguishing performance of a dried film formed according to a test example of the present invention.

Hereinafter, specific examples are presented to aid understanding of the present invention. However, the following examples are provided only to make the present invention easier to understand, and the content of the present invention is not limited by the examples.

Manufacture of fire extinguishing paint composition for initial fire extinguishment of common equipment and local equipment

The fire extinguishing paint composition for initial fire extinguishing of local equipment of the present invention was prepared through the process shown in Table 1 below. The composition and composition ratio are shown in Table 2 below.

The extinguishing microcapsules of Examples 1 to 3 of the present invention are composed of a single shell-core structure, and the core portion is composed of perfluoro 2-methyl-3-pentanone and 1,1, It contains 2,2,3,3,4-heptafluoro cyclopentane (1,1,2,2,3,3,4-heptafluoro cyclopentane) in a 1:1 content, and the shell part is melamine-urea-form. It was composed to include an aldehyde resin (Melamine-urea-formaldehyde resin).

It was prepared in the same manner as in the Example with the composition and composition ratio shown in Table 2 below.

NO Process Name note One Raw materials and receipt confirmation - 2 Input raw materials and stir After adding NO 1 to 4, stir for 5 minutes at 300 rpm. After adding NO 5, stir for 10 minutes.
Check the appearance of the glass plate
Add NO 6~7 and stir for 10 minutes 3 Input of raw materials and high-speed stirring (preliminary dispersion) Add NO 8 at 700 rpm and stir for 10 minutes.
Add NOs 9 to 11 in order at 900 rpm and stir for 30 minutes.
Add NO 13 at 900 rpm and stir for 20 minutes. 4 High-speed dispersion Stir for 30 minutes at 1200 rpm and check appearance on glass plate 5 Input raw materials and stir Gradually add NO 12 in 1/3 portions at 600 rpm and continue stirring for 20 minutes after complete mixing. Check appearance on glass plate.
Add NO 14 to 17 in order and stir for 10 minutes. 6 Input raw materials and stir at low speed Maintaining the stirring speed, add 1/3 of NO 18 and stir for 5 minutes, then add the remainder and stir for 10 minutes at 400 rpm. 7 Input raw materials and stir at low speed Maintaining the stirring speed, divide NO 19 into 1/4 portions and add 4 times. Stir for 10 minutes after the 1st time, 10 minutes after the 2nd time, 10 minutes after the 3rd time, and 30 minutes after the 4th time, and stir on a glass plate. Check appearance 8 Low speed stirring after adding raw materials Maintain the stirring speed and stir for 10 minutes after adding NO 20. 9 Check viscosity and specific gravity Viscosity: 100±ka/25℃ Specific gravity: 1.2±0.5/20℃

NO division Example 1 Example 2 Example 3 Comparative Example 1 Comparative example 2 Comparative example 3 Comparative example 4 Comparative Example 5 One water 11.2 9.2 6.2 9.2 28.2 16.2 13.2 4.2 2 Freezing stabilizer (PROPYLENE GLYCOL) 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 3 Fluorinated surfactant (FC 4430) 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 4 Wetting and dispersing agent and leveling agent (BYK 190) 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 5 Thickener (NATRASOL 250HHR) 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 6 Corrosion inhibitor (SYNTHRO COR B) 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 7 Film forming agent (TEXANOL (C:12)) 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 8 White pigment (titanium dioxide: TIO₂) 8.0 8.0 8.0 8.0 8.0 8.0 8.0 8.0 9 Fused Alumina 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 10 Zirconium Silicate 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 11 ZINC PHOSPHATE 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 12 Hollow body made by foaming igneous rock at high temperature (MSD600) 7.0 7.0 7.0 7.0 7.0 7.0 7.0 7.0 13 Fused Silica (K-300) 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 14 Preservative (BIO TO CIDE 3300N) 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 15 Fluorine-based stain inhibitor (SRC 220) 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 16 PH regulator (AMP 95) 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 17 Antibacterial agent (PANGUNCIDE 368GL) 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 18 Water-based epoxy emulsion 32.0 32.0 32.0 32.0 32.0 32.0 32.0 32.0 19 Microcapsules (average particle diameter 0.5-0.9 mm) 15.0 17.0 20.0 17.0
(0.2-0.5 mm) - 10.0 13.0 22.0 20 Defoamer (SN-DEFOAMER) 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5

<Test Example 1> Dry film formation conditions

The compositions of Examples 1 to 3 and Comparative Examples 1 to 5 were applied and dried on one surface of the object under the conditions shown in Table 3 below to form a dry film. Here, KS F 3101 ordinary plywood with a thickness of 1.2 mm, a width of 200 mm, and a height of 250 mm was used.

condition unit Dry film thickness 1,000±50㎛ Number of coats (brush) Episode 2 Interval between coats (time) 60 minutes drying time
(Outdoor temperature 20℃) Touch dry several times 30 minutes solidification drying 4 hours Completely cured and dried 24 hours

<Test Example 2> Physical property measurement

The items of the dried film formed in Test Example 1 were measured according to each test standard as shown in Table 4 below.

Experiment items Test specifications Adhesion KSM ISO 2409, ASTM D3359 (CROSS CUT B method) Corrosion resistance (salt spray resistance, 300 hours) KS D 9502-2007 Acid resistance (5% sulfuric acid solution for 24 hours) KSM ISO 2812-1:2012 Alkali resistance (5% NaOH aqueous solution for 24 hours) KSM ISO 2812-1:2012 Water resistance ((23±1)℃, distilled water for 24 hours) KSM ISO 2812-2:2012 Heat release rate (concalometric method) Ministry of Land, Infrastructure and Transport Notification No. 2022-84, Article 25, No. 1 (Total heat release rate 8MJ/㎡ or less, time for which the heat release rate continuously exceeds 200 kW/㎡ 10 seconds or less) Gas toxicity test Ministry of Land, Infrastructure and Transport Notification No. 2022-84 Article 25 No. 2 (Average behavioral suspension time of laboratory rats 9 minutes or more) moisture resistance Constant temperature and humidity 40℃, 100% RH, 96 hours

Experiment items Example 1 Example 2 Example 3 Comparative Example 1 Comparative example 2 Comparative example 3 Comparative Example 4 Comparative Example 5 Adhesion 5B(ISO:0) 5B
(ISO:0) 4B
(ISO:1) 4B
(ISO:1) 2B
(ISO:3) 2B
(ISO:3) 3B
(ISO:2) 2B
(ISO:3) corrosion resistance Excellent (RN9.8) Great
(RN9.8) commonly
(RN9) Great
(RN9.5) commonly
(RN9.3) commonly
(RN8) commonly
(RN8) error
(RN6) acid resistance Great Great Great Great commonly Great Great commonly Alkali resistance Great Great Great Great Great Great Great commonly water resistance Great Great Great Great commonly Great Great commonly heat release rate
(MJ/㎡, s) Great
(5.7, 0) fitness
(2.0, 0) fitness
(1.7, 0) fitness
(1.9, 0) error
(8.2, 2) commonly
(7.9, 3) commonly
(7.8, 3) error
(8.5, 5) Gas hazard
(min, s) fitness
(11,30) fitness
(12,57) Great
(10,55) fitness
(11,76) commonly
(9,30) Great
(12,15) Great
(10,15) commonly
(9,15) moisture resistance commonly Great commonly commonly commonly commonly commonly commonly

As a result, as shown in Table 5, in the case of Examples 1 to 3, the adhesion, corrosion resistance, acid resistance, alkali resistance, water resistance, heat release rate, gas toxicity, and moisture resistance of the formed dry coating film were all excellent, but Comparative Example In the case of 1 to 5, it was confirmed that the physical properties were inferior to those of Examples 1 to 3.

<Test Example 3> Measurement of fire extinguishing performance after forming a dry film

It was made of plastic measuring 160mm wide, 210mm long, and 210mm high, and a burner was fixed and ignited inside a square cylinder with an open top.

After sealing one surface on which the dry coating film of the above embodiment is formed by covering the open upper surface so that the flame of the burner comes into contact with the surface, the initial self-extinguishing self-sensing temperature, initial extinguishing time, and re-combustion suppression time are determined with the flame of the burner sealed. was measured (see Figure 3).

Here, the initial extinguishing self-sensing temperature is measured using a digital thermometer when the microcapsule reacts when the burner flame contacts the surface.

The measurement results were as shown in Table 6 below. In the case of Comparative Example 2, it did not contain microcapsules capable of extinguishing fire, so the fire extinguishing performance could not be measured.

Experiment items Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 3 Comparative Example 4 Comparative Example 5 Initial digestion self-sensitivity temperature 301℃ 305℃ 300℃ 302℃ 290℃ 295℃ 275℃ Initial fire extinguishing time 8 seconds 7 seconds 6 seconds 11 seconds 14 seconds 10 seconds 4 seconds Reburn suppression time 13 seconds 12 seconds 8 seconds 15 seconds Impossible 12 seconds 10 seconds - Initial extinguishing self-sensing temperature: The temperature responded to by the microcapsule when the burner flame is sealed.
- Initial extinguishing time: The time from when the microcapsule reacts after ignition to when the flame disappears and the first smoke appears.
- Reburn suppression time: Time taken to cool from 800℃ to 30℃

As a result, as shown in Table 6, in Examples 1 to 3, the shell portion of the microcapsule reaches 120 to 350°C due to thermal runaway, detects this temperature, melts and bursts within 8 seconds, and the extinguishing agent in the core is sprayed. , it was confirmed that the extinguishing material was cooled from 800°C to 30°C within 15 seconds, thereby suppressing reburning.

On the other hand, in Comparative Example 1, it was confirmed that the initial digestion time took time due to the average particle diameter of the microcapsules being 0.2-0.5 mm. In Comparative Example 3-4, it was confirmed that because the microcapsule content was less than 15% by weight, it took time to reach the initial extinguishment time, and it was impossible to suppress re-combustion. In addition, in Comparative Example 5, the initial extinguishing time was reduced because the content of microcapsules exceeded 20% by weight, but it was confirmed that the viscosity of the paint increased, workability deteriorated, and physical properties such as durability of the dried coating film deteriorated.

The present invention is a core-shell structured initial fire extinguishing microcapsule that self-reacts to the flame temperature when a fire occurs and extinguishing substances are sprayed to extinguish the fire early, and the extinguishing substances are cooled to suppress re-combustion. A fire extinguishing paint composition for firefighting can be provided.

Claims (7)

Based on the total weight of the fire extinguishing paint composition, a fire extinguishing paint composition for local equipment, comprising 15 to 20% by weight of microcapsules for extinguishing an initial fire of a core-shell structure that is self-temperature sensitive at a temperature of 120 to 350 ° C. The method of claim 1, wherein the core portion of the microcapsule for extinguishing an initial fire is composed of perfluoro 2-methyl-3-pentanone and 1,1,2,2,3,3, A fire extinguishing paint composition for local equipment containing 4-heptafluoro cyclopentane (1,1,2,2,3,3,4-heptafluoro cyclopentane). The method of claim 2, wherein the content ratio of perfluoro 2-methyl-3-pentanone and 1,1,2,2,3,3,4-heptafluoro cyclopentane is 1:3 to 3:1. A fire extinguishing paint composition for local equipment in common ducts. According to claim 1, The shell portion of the microcapsule for extinguishing an initial fire contains melamine-urea-formaldehyde resin. The fire extinguishing coating composition for local equipment according to claim 1, wherein the microcapsules for extinguishing an initial fire have an average particle diameter of 0.5-0.9 mm. According to claim 1, The fire extinguishing paint composition further comprises 30 to 40% by weight of an aqueous epoxy emulsion and 12 to 35% by weight of a ceramic-based inorganic filler, based on the total weight of the fire extinguishing paint composition. Composition. The method of claim 6, wherein the ceramic-based inorganic filler is 2 to 7% by weight of fused alumina, 2 to 7% by weight of zirconium silicate, and 5 to 10% by weight of a hollow body obtained by foaming igneous rock at high temperature, based on the total weight of the fire extinguishing paint composition. A fire extinguishing coating composition for local equipment, comprising 0.5 to 3% by weight of silica and 2 to 7% by weight of zinc phosphate.

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