KR-102964024-B1 - Secondary fire suppression system with fast-curing thick-film forming coating composition for electrical fires in distribution switchboard(and cabinet panels)

KR102964024B1KR 102964024 B1KR102964024 B1KR 102964024B1KR-102964024-B1

Abstract

The present invention belongs to the field of electrical fire prevention technology, and in particular relates to a fast-curing, thick-film forming paint composition for electrical fires in distribution panels, a method of constructing a distribution panel using the paint, and a secondary fire extinguishing system to which the same is applied. The curable thick-film forming paint composition and secondary fire extinguishing system for electrical fires in distribution panels according to the present invention provide the following effects. First, most general fire extinguishing paints are slow-drying and cannot form a desired thickness in a single application, requiring repeated painting to achieve fire extinguishing performance; however, the coating agent described above can form a desired thickness due to its ultra-fast drying characteristics, and the double-layer microcapsules are fixed immediately upon spraying to form a dense layered structure, thereby providing excellent fire extinguishing capabilities. Second, a space is formed on the upper part of the distribution panel and filled with surface-treated double-layer microcapsules, and a plurality of mesh nets smaller than the size of the microcapsules are layered on the lower part, with the bottom sealed with the fast-curing, thick-film forming paint, thereby providing a secondary fire extinguishing function when flames progress continuously. Third, since the fire extinguishing paint is applied to the entire interior surface of the distribution panel, it has the characteristic of extinguishing a fire regardless of where it occurs within the box, and additionally, the coating film formed by urea bonding has insulating performance.

Inventors

박무성
홍성권
김재학
김형곤
이동훈

Dates

Publication Date: 20260511
Application Date: 20250311

Claims (5)

(a) A process of coating the entire interior of a hexahedral distribution board with a fast-curing, thick-film-forming paint; (b) A process of fixing an "L" shaped support for space on the upper side of the above distribution panel; (c) A process of preparing a drawer-shaped structure capable of filling the space of the above distribution board; (d) A process of installing multiple mesh nets smaller than the size of microcapsules in an overlapping manner on the lower part of the above structure, and then sealing the bottom by coating it with a fast-curing thick-film forming paint; (e) A process of filling the above space with surface-treated double-layer microcapsules; (f) a process of securing the top of the filled microcapsule by covering it with the inner lid of the drawer; and (g) A method for constructing a fire suppression distribution panel, characterized by including the process of installing the above structure by pushing it into the upper inner part of the distribution panel so that the surface-treated double-layer microcapsules fall freely in the event of a fire.
In claim 1, A method for constructing a fire suppression distribution panel, wherein the above-described rapid-curing thick-film forming paint composition is a two-component paint composition comprising a main component and a curing agent, wherein the main component comprises 20 to 40 parts by weight of diethyl aspartic acid ester, 30 to 45 parts by weight of surface-treated double-layer microcapsules, 2 to 7 parts by weight of pigment, 0.5 to 3 parts by weight of silicate silicate, 0.1 to 1.0 parts by weight of dispersant, 0.1 to 1.0 parts by weight of defoamer, 0.5 to 2.0 parts by weight of sedimentation inhibitor, 0.1 to 1 part by weight of silane, and 0.1 to 1.0 parts by weight of moisture-removing resin, and the curing agent comprises 20 to 40 parts by weight of an aliphatic polyisocyanate alone or a mixture of polyisocyanate and glycols.
In claim 1, The above microcapsule is composed of a double layer of a core layer and a shell layer, the core component is composed of perfluoro(2-methyl-3-pentanone), the particle size is 2 to 200 μm, and to form the microcapsule, the inner component is composed of gelatin and the outer component is composed of urea-resorcinol-formaldehyde resin. A method for constructing a fire suppression distribution panel, characterized by surface coating treatment of microcapsules by immersion in a coating solution mixed in a ratio of 5 to 10:5 to 10:80 to 90.
In claim 1, the step (a) Paint housing; A sprayer connected to a tank with two pressurized and heated components; and A method for constructing a fire suppression distribution panel, characterized by using a spray gun for spraying a fast-curing thick-film paint composition, characterized by being equipped with a steady mixer capable of allowing surface-treated double-layer microcapsule particles to pass through and mixing the composition according to the mixing ratio.
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Description

Secondary fire suppression system with fast-curing thick-film forming coating composition for electrical fires in distribution switchboards (and cabinet panels) The present invention belongs to the field of electrical fire prevention technology, and in particular relates to a fast-curing, thick-film forming paint composition for electrical fires in distribution and switchboards, a method of constructing a distribution and switchboard using the paint, and a secondary fire extinguishing system to which the same are applied. According to fire statistics analysis by the Korea Electrical Safety Corporation, electrical fires accounted for 8,871 out of a total of 38,857 fire incidents in 2023. By cause of ignition, fires caused by unidentified short circuits were the highest at 3,020 cases (34.0%). This was followed by short circuits due to insulation degradation at 1,611 cases (18.2%), short circuits due to tracking at 1,307 cases (14.7%), and poor contact at 901 cases (10.2%). By facility type, fires originating from wiring and wiring devices accounted for 2,095 cases, or 23.6% of the total. Various factors, such as overloading, short circuits, and the use of unsuitable electrical equipment, can cause initial fires. In most cases, these locations are out of reach or are prone to distractions, leading to a missed opportunity for early fire suppression and the spread of the fire. In addition, because fires cannot be visually detected due to internal leakage, defects in insulation, overheating of terminals and contacts, cracks and damage to cables, or deterioration, they may not be extinguished in the early stages and could lead to a large-scale fire. To address these issues, there has recently been a trend of successive releases of various fire extinguishing products utilizing microcapsules containing extinguishing agents. These products are designed to extinguish initial fires by automatically releasing the agent in response to a fire without the need for separate equipment in locations with a high risk of fire or those vulnerable to fire. In other words, since conventional microcapsules consist of a extinguishing agent as the core and an outer encapsulation, the agent can de-encapsulate within a narrow temperature range within a short time when a fire occurs, allowing for rapid fire suppression and thus offering the advantage of increased fire suppression efficiency. However, microcapsules are highly susceptible to external environmental influences. If the capsule is destroyed by external force or environmental factors and the extinguishing agent in the core is released to the outside, a problem frequently arises where the amount of agent is insufficient at the moment of fire suppression, failing to meet the required concentration. Due to this problem, various technologies have been gradually developed, such as using diverse encapsulation methods—including sheet, cable, and paint forms—where the capsule is attached, wrapped, or coated, allowing the agent to be released externally upon destruction of the capsule during a fire to suppress the fire. Generally, although there are devices such as IoT-based degradation monitoring systems, heat detection sensors, and infrared detection sensors, as well as automatic fire extinguishing equipment, there are issues regarding post-maintenance, including the burden of high equipment costs and the need for personnel to inspect and monitor for mechanical failures and communication disruptions. Furthermore, because electrical fires spread rapidly and instantaneously, the delay between detection and extinguishing makes initial suppression difficult, leading to a phenomenon where these systems are rejected by users. To address these issues, Korean Patent Registration No. 10-2730029 discloses a “self-extinguishing microcapsule pad with combined functions.” In this technology, to manufacture the pad, microcapsules are mixed with a water-based elastic acrylic emulsion or a similar resin, hardened at room temperature for a certain period, and then double-sided tape is applied to the back surface. The pad is then cut to a specific size, the protective film is removed, and it is attached to the upper layer of the distribution panel. While this method is effective when the inside of the box is a small space and the flame is weak, it is insufficient for initial fire suppression when the box is densely packed with circuit breakers, terminals, wires, etc., or when a fire occurs at the bottom of the box; in such cases, it takes tens of seconds for the heat to reach the temperature required for the fire extinguisher pad attached to the top to activate the extinguishing function. Furthermore, there may be issues due to poor long-term water resistance and durability in humid areas such as riversides or the sea, as well as in mountainous areas or basements. In addition, Korean registration number 10-2197855 discloses “fire extinguishing paint for small spaces and method of manufacturing the sam