Method for producing fire-resistant resin composition, fire-resistant article produced from the fire-resistant resin composition, and method for producing the fire-resistant article

Abstract

To provide a method for producing a fireproof resin composition which is installed in an electric wire through-hole of a wall body and can prevent a fire from spreading beyond the wall body while being foamed and expanded by fire at the time of the fire, to provide a fireproof tool produced from the composition, and to provide a method for producing the fireproof tool.SOLUTION: A method for preparing a fire-resistant resin composition includes a dissolution step of adding water, pentaerythritol (PE), melamine resin powder, and ammonium polyphosphate (APP) at a specific ratio to a tank and heating at a temperature of 100 °C for 2 to 3 hours, a reaction step of further mixing a liquid urea resin to which APP and water are added at a specific ratio and ammonium chloride and stirring in a boiling state to produce an APP-PE polymer, an aging step of stopping stirring and aging and curing at room temperature for 2 to 4 hours, a grinding step of grinding a massive APP-PE polymer to a particle size of 100 to 300 mesh, and a mixing step of mixing a silicone resin, APP-PE polymer powder, and a platinum catalyst.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a method for producing a fire-resistant resin composition that is placed in an electric wire penetration opening of a wall and that, when exposed to fire, foams and expands to prevent the fire from spreading beyond the wall, as well as to a fire retardant produced from the composition and a method for producing the same. [Background technology]

[0002] BACKGROUND ART In buildings and industrial equipment, liquid-hardening sealants such as various coating materials, foam materials, sealants, and molding materials are widely used for the purposes of fluid sealing of joints, soundproofing, and heat insulation.

[0003] In order for this sealant to exhibit sufficient fluid sealing, soundproofing and heat insulation performance, it is necessary to fill the joints (gaps) of the structure with the sealant.

[0004] Heat-expandable, flame-retardant silicone foam has the properties of expanding and insulating in the event of a fire, making it suitable for use in places that require airtightness and watertightness, such as electrical wire penetrations and pipe penetrations.Even a small amount of use can seal one or more cables, pipes, ducts, etc. through walls or wall holes, protecting property and life.

[0005] Furthermore, a thermally expandable flame retardant material is used to seal the holes through the wall in a manner that seals the holes so that flames and smoke do not pass through the wall in the event of a fire, preferably in a manner that prevents heat transfer.

[0006] Such conventional sealants made of foam material are inserted in a compressed state into the required area, and the sealant fills the joints (gaps) by restoring its shape due to the elasticity of the foam material itself.

[0007] However, conventional foam materials instantly recover elastically when pressure is released, so the foam material or a product using the foam material must be installed in a location where fluid sealing, soundproofing, and heat insulation are required while maintaining a compressed state against the foam material's restoring force, which creates the problem of significantly reducing workability.

[0008] In recent years, fire stoppers have been molded into a sleeve shape, and a cable that penetrates the wall is inserted into this fire stopper. Therefore, when a fire occurs, the fire stopper expands due to heat, sealing the device and preventing flames and smoke from spreading beyond the wall.

[0009] However, to ensure sufficient performance, the sleeve must be attached to the cable at least a certain length (approximately 150 mm), which poses a problem of limitations on where it can be installed.

[0010] Furthermore, when a fire breaks out, the sleeve loses its shape before thermal expansion, causing flames and smoke to spread through gaps. [Prior art documents] [Patent documents]

[0011] [Patent Document 1] Korean Patent Publication No. 10-1473260 (Resin composition capable of expanding when exposed to fire and its manufacturing method) [Patent Document 2] Korean Patent Registration No. 10-0803466 (Thermal expansion material and its manufacturing method) [Patent Document 3] Korean Patent Publication No. 10-2004-0019114 (Fireproof system and method for passing at least one cable or pipe through a wall opening) Summary of the Invention [Problem to be solved by the invention]

[0012] The present invention has been devised to solve the above-mentioned problems, and aims to provide a method for producing a fire-resistant resin composition that has excellent fire resistance and heat insulation properties even when a sleeve-shaped fire retardant is molded into a short length, does not lose its shape until the fire retardant reaches a foaming temperature in the event of a fire, and is mass-producible, thereby reducing production costs; a fire retardant made from the fire-resistant resin composition; and a method for producing the fire retardant. [Means for solving the problem]

[0013] In order to achieve the above object, the method for producing a fireproof resin composition according to the present invention comprises the steps of: 100 parts by weight of water; 10 to 30 parts by weight of pentaerythritol (PE); 5 to 30 parts by weight of melamine resin powder; ammonium polyphosphate (APP); the reaction step of further mixing 10 to 50 parts by weight of a liquid urea resin, which is a mixture of 40 to 80 wt% of water and 20 to 60 wt% of a urea resin, and 0.2 to 1.0 parts by weight of ammonium chloride with 30 to 60 parts by weight of ammonium polyphosphate in a tank and heating at 100°C for 2 to 3 hours, and stirring the mixture at a boil to produce an APP-pentaerythritol polymer; the maturation step of stopping the stirring and allowing the mixture to mature and harden at room temperature for 2 to 4 hours; the crushing step of crushing the aggregated APP-pentaerythritol polymer to a particle size of 100 to 300 mesh; and the mixing step of mixing 30 to 200 parts by weight of the APP-pentaerythritol polymer powder and 0.1 to 3.0 parts by weight of a platinum catalyst with 100 parts by weight of a silicone resin.

[0014] At this time, in the mixing step, 5 to 30 parts by weight of graphite is further mixed with 100 parts by weight of the silicone resin.

[0015] In the mixing step, 7 to 15 parts by weight of silicone oil is further mixed with 100 parts by weight of silicone resin.

[0016] In the mixing step, 1 to 5 parts by weight of epoxy silane is further mixed with 100 parts by weight of silicone resin.

[0017] The fire retardant according to the present invention is produced by extrusion molding the fire retardant resin composition produced by the above-mentioned production method.

[0018] At this time, the fire retardant is characterized by being in the shape of a sleeve and having a length of 50 to 70 mm.

[0019] The method for manufacturing a fire retardant according to the present invention is characterized in that the fire retardant resin composition manufactured by the above manufacturing method is extruded into a pipe shape between an outer die (132) and an inner die (131), and by inserting a rod (133) onto the central axis of the inner die (131), the fire retardant resin composition hardens in a state of being in close contact with the outer surface of the rod (133), forming a sleeve-shaped molded product (134), and the molded product (134) is cut at predetermined intervals to manufacture the fire retardant (100). [Effects of the Invention]

[0020] The fireproof resin composition of the present invention and the fireproof equipment made from it expand with the fire when a fire breaks out, thereby sealing a specific through hole and effectively preventing flames and smoke from spreading from the through hole.

[0021] In addition, when a fire occurs, by maintaining the shape of the fire stopper until the temperature at which the fire stopper begins to expand is reached, it is possible to prevent flames and smoke from spreading through gaps created by the collapse of the shape before the fire stopper expands.

[0022] Furthermore, sufficient fire protection can be obtained even if the length is shorter than that of existing sleeve-shaped fire retardants. [Brief explanation of the drawings]

[0023] [Figure 1] 1 is a perspective view showing a fire retardant according to the present invention. [Figure 2] FIG. 10 is a perspective view showing a coaming to which fire protection equipment is attached. [Figure 3] FIG. 1 is a view showing a state in which the fire retardant according to the present invention is attached to a coaming. [Figure 4] FIG. 2 is a cross-sectional view showing a state in which the fire retardant according to the present invention is extrusion molded. [Figure 5] 10A and 10B are diagrams showing a process of cutting the extruded molded product at predetermined intervals to produce a fire retardant. DETAILED DESCRIPTION OF THE INVENTION

[0024] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to preferred embodiments thereof and the accompanying drawings, in which like reference numerals refer to like elements throughout the drawings.

[0025] In the detailed description of the invention or the claims, when any one component is said to "comprise" another component, this should not be interpreted as being limited to consisting of only that component, but should be understood as meaning that the component may further include other components, unless otherwise specified.

[0026] The resin composition according to the present invention uses raw materials in which pentaerythritol, ammonium polyphosphate (APP), melamine resin having an amino group (-NH2), urea resin, and ammonium chloride are mixed with water.

[0027] These are heated in a water bath and stirred at a boiling state, and after the reaction has occurred, the substance that matures and solidifies is called "APP-pentaerythritol polymer," a substance that simultaneously exhibits expansion and flame retardant effects, and is used as the basic raw material for expansion flame retardant compositions.

[0028] The APP-pentaerythritol polymer can be foamed by heat without the need for a separate foaming agent, and can be formed even with a small amount of use, thereby blocking flames and gases from adjacent walls in the event of a fire.

[0029] In addition, it seals the hole to prevent heat transfer and serves to protect the area where damage is expected by sealing one or more cables, pipes, ducts, etc. through the hole in the wall.

[0030] The method for producing the fireproof resin composition of the present invention will be described below.

[0031] Dissolution stage

[0032] A dissolution step is carried out by adding 100 parts by weight of water, 10 to 30 parts by weight of pentaerythritol (PE), 5 to 30 parts by weight of powdered melamine resin, and 30 to 60 parts by weight of powdered ammonium polyphosphate (APP) to a tank of a water bath reactor, and boiling the mixture at 100°C for 2 to 3 hours to dissolve the water.

[0033] Melamine resin is cured and dried using pentaerythritol as a base material.

[0034] Ammonium polyphosphate is a phosphorus-based flame retardant that is widely used as a flame retardant due to its excellent thermal stability and decomposition temperature of 250°C or higher.

[0035] Reaction step

[0036] After the dissolving step, 30 to 60 parts by weight of ammonium polyphosphate, 10 to 50 parts by weight of liquid urea resin, and 0.2 to 1.0 part by weight of ammonium chloride are added to a tank.

[0037] The urea resin is a liquid mixture of 40 to 80 wt% water and 20 to 60 wt% urea resin, and the ammonium chloride is charged into the tank in a powder state.

[0038] The mixture is then allowed to react at a boil for 20 minutes while stirring at a speed of 30 to 60 rpm.

[0039] The addition of liquid urea resin helps to hold the mixed materials together, improve water resistance, and maintain the shape of the fireproof resin when it expands due to heat. If the amount of liquid urea resin is less than 10 parts by weight, the resin will not be able to maintain its shape when it expands due to heat, and if it exceeds 50 parts by weight, the fireproof performance will decrease. Therefore, 10 to 50 parts by weight of liquid urea resin is added.

[0040] The ammonium chloride serves to harden the liquid urea resin.

[0041] In the reaction step, ammonium polyphosphate (APP) and pentaerythritol (PE) react to form an APP-pentaerythritol polymer.

[0042] Ripening stage

[0043] Once the reaction has occurred in the reaction step, the stirring of the tank is stopped and the mixture is left at room temperature for 2 to 4 hours for aging and hardening.

[0044] During the aging step, a solidified APP-pentaerythritol polymer is formed.

[0045] Crushing stage

[0046] The APP-pentaerythritol polymer mass obtained from the reaction and aging steps is pulverized to a size of 100 to 300 mesh.

[0047] Mixing Stage

[0048] The fireproof resin composition 130 according to the present invention is prepared by mixing the APP-pentaerythritol polymer pulverized in powder form in the pulverizing step with a resin and a catalyst.

[0049] Silicone resin is mixed as the resin, and platinum catalyst is mixed as the catalyst, with 30 to 200 parts by weight of APP-pentaerythritol polymer powder and 0.1 to 3.0 parts by weight of platinum catalyst being mixed with 100 parts by weight of silicone resin.

[0050] Silicone resin with a viscosity of 1,000 to 50,000 cps is used for ease of work, and the role of the silicone resin is to maintain the shape of the fire retardant until it is thermally expanded by the fire after it is molded into a finished product.

[0051] 30 to 200 parts by weight of APP-pentaerythritol polymer is mixed with 100 parts by weight of silicone resin. If the amount of APP-pentaerythritol polymer mixed is less than 30 parts by weight, the expansion and heat insulation required for the fire retardant cannot be achieved, and if the amount of APP-pentaerythritol polymer mixed is more than 200 parts by weight, the fire retardant molded as a product will collapse before it can expand due to fire.

[0052] Therefore, it is preferable to mix 30 to 200 parts by weight of the APP-pentaerythritol polymer with 100 parts by weight of the silicone resin.

[0053] The platinum catalyst serves to harden the silicone resin.

[0054] Platinum catalyst is mixed in an amount of 0.1 to 3.0 parts by weight per 100 parts by weight of silicone resin. If the amount of platinum catalyst mixed is less than 0.1 part by weight, the resin will not cure sufficiently, resulting in reduced productivity. If the amount of platinum catalyst mixed is more than 3.0 parts by weight, the silicone will cure too quickly, resulting in reduced workability and moldability.

[0055] In the present embodiment, a platinum catalyst is used as the silicone resin curing agent, but a copper catalyst can also be used instead of the platinum catalyst.

[0056] It is preferable to further mix powdered graphite in the mixing step.

[0057] When graphite is mixed into a mixture of APP-pentaerythritol polymer and silicone resin, the graphite particles absorb some of the heat in the event of a fire, improving the insulation properties and improving the expansion properties of the mixture.

[0058] It is preferable to mix 5 to 30 parts by weight of such graphite with 100 parts by weight of silicon.

[0059] If graphite is mixed in an amount of less than 5 parts by weight per 100 parts by weight of silicon, the effect of improving heat insulation and expansion properties is slight, and if it is mixed in an amount of more than 30 parts by weight, the shape of the mixed composition will collapse before it expands due to fire, so it is preferable to mix 5 to 30 parts by weight of graphite per 100 parts by weight of silicon.

[0060] To ensure uniform mixing of the silicone resin and other materials, it is preferable to further mix 7 to 15 parts by weight of silicone oil with 100 parts by weight of silicone resin, and to increase the bonding strength of the mixed materials, it is preferable to further mix 1 to 5 parts by weight of epoxy silane with 100 parts by weight of silicone resin.

[0061] The fire retardant resin composition described above is used to produce a fire retardant 100. As shown in FIG. 1, the fire retardant 100 according to the present invention has a cylindrical body 101, and a hole 102 of a predetermined diameter is formed in the axial direction at the center of the body 101, and the body is molded into a sleeve shape.

[0062] The fireproof resin composition 130 produced by the above-described fireproof resin production method is extrusion-molded to produce the fireproof equipment 100.

[0063] As shown in FIG. 4, a fireproof resin composition 130 is extruded between a ring-shaped inner die 131 and an outer die 132 and molded into a pipe shape.

[0064] At this time, as shown in FIG. 4, a rod 133 of a predetermined length is continuously inserted into the inner die 131 so that the extruded fireproof resin composition 130 is extruded onto the outer surface of the rod 133, and after being extruded, the extruded fireproof resin composition 130 is supported by the rod 133 and maintains its pipe shape until it hardens.

[0065] The rod 133 is continuously fed inside the inner die 131 while the fire-resistant resin composition 130 is extruded.

[0066] After the extrusion-molded fireproof resin composition 130 is cured, the rod 133 is removed from the molding 134, and a hole 135 is formed in the center of the molding 134 in the axial direction, as shown in FIG.

[0067] Then, as shown in FIG. 5, the molded product 134 is cut to a predetermined length to produce a sleeve-shaped fire retardant 100 having a hole 102 formed in the axial direction at the center of the body 101, as shown in FIG.

[0068] At this time, it is preferable that the fire retardant 100 is cut into lengths of 50 to 70 mm.

[0069] Conventional fire retardants molded into a sleeve shape are molded to a length of about 150 mm to ensure sufficient fire protection, but the fire retardant 100 of the present invention can be molded shorter than conventional fire retardants and still maintain sufficient fire protection, allowing for greater freedom in installation.

[0070] FIG. 2 is a perspective view showing a coaming of a ship, in which a coaming 110 is formed on a flange 112, and a through hole 111 that penetrates the flange 112 is formed in the coaming 110.

[0071] Various cables and the like pass through the through-holes 111 of the coaming 110 beyond the wall of the ship, and in the event of a fire, a fire retardant 100 is inserted into the through-holes 111 of the coaming 110 as shown in Figure 3 to prevent flames from spreading through the through-holes 111.

[0072] The cable 10 is inserted into the hole 102 of the fire stopper 100 inserted into the through hole 111 of the coaming 110, or the fire stopper 100 and the cable 10 are installed in the through hole 111 of the coaming 110 so that the cable 10 is positioned between the fire stoppers 100.

[0073] Then, although not shown, after the installation of the fire retardant 100 and cable on the coaming 110 is completed, a sealant is applied to both end portions of the fire retardant 100 (both sides of the through hole 111 in the coaming 110) to seal the through hole 111.

[0074] If a fire breaks out in one area of ​​the ship while the fire prevention device 100 is installed on the coaming 110 as described above, the flames and smoke may spread to other areas along the cable 10 passing through the coaming 110. However, the fire causes the fire prevention device 100 to foam and crimp the cable 10, completely closing the penetration opening 111 of the coaming 110, thereby preventing the flames and smoke from spreading to other areas.

[0075] Conventional fire retardants are designed to be 150 mm or longer in length to ensure effective fire protection, which results in the length of the coaming 110 that houses the fire retardant being long, causing the coaming 110 to protrude significantly from the wall.

[0076] The fireproof resin composition according to the present invention has excellent expansibility, heat resistance and heat insulation properties, and therefore can exhibit effective fireproofing performance even when molded into a fireproof device having a short length of 50 to 70 mm.

[0077] When a fire breaks out, the fire retardant expands at a temperature of approximately 160°C to close the opening 111, but conventional fire retardants lose their shape before reaching the expansion temperature, and are sometimes unable to fully perform their role as a fire retardant.

[0078] The fire retardant 100 according to the present invention can prevent the spread of flames and smoke by retaining its shape until it reaches its expansion temperature.

[0079] <Example>

[0080] 100 parts by weight of water, 20 parts by weight of pentaerythritol, 20 parts by weight of melamine resin powder, and 35 parts by weight of ammonium polyphosphate powder were placed in a tank and heated at 100° C. for 3 hours.

[0081] 30 parts by weight of liquid urea resin, which was a mixture of 60 wt% water and 40 wt% urea resin, and 0.6 parts by weight of ammonium chloride were added to a tank and stirred at a boiling temperature for 20 minutes at 40 rpm. After stirring was completed, the mixture was aged and cured at room temperature for 4 hours to form an APP-pentaerythritol polymer.

[0082] The chunky APP-pentaerythritol polymer was ground to a size of 200 mesh.

[0083] A fire-resistant resin composition was prepared by mixing 100 parts by weight of a silicone resin with a viscosity of 20,000 cps, 120 parts by weight of an APP-pentaerythritol polymer, 2 parts by weight of a platinum catalyst, 20 parts by weight of graphite powder, 10 parts by weight of silicone oil, and 2 parts by weight of an epoxy silane.

[0084] The fireproof resin composition was melted and extruded into a pipe having an outer diameter of 20 mm, an inner diameter of 14 mm and a length of 60 mm to prepare a fireproof device.

[0085] <Comparative Example>

[0086] 100 parts by weight of water, 20 parts by weight of pentaerythritol, 20 parts by weight of melamine resin powder, and 35 parts by weight of ammonium polyphosphate powder were placed in a tank and heated at 100° C. for 3 hours.

[0087] 30 parts by weight of liquid urea resin, which was a mixture of 60 wt% water and 40 wt% urea resin, and 0.6 parts by weight of ammonium chloride were added to a tank and stirred at a boiling temperature for 20 minutes at a speed of 40 rpm. After stirring was completed, the mixture was aged and dried at room temperature for 4 hours to form an APP-pentaerythritol polymer.

[0088] The bulk APP-pentaerythritol polymer was ground to a 200 mesh size.

[0089] The fireproof resin composition was melted and extruded into a pipe having an outer diameter of 20 mm, an inner diameter of 14 mm and a length of 60 mm to prepare a fireproof device.

[0090] The above examples and comparative examples were heated to 160° C., which is the expansion temperature of the APP-pentaerythritol polymer, and the collapse of the shape of the fire retardant was observed.

[0091] <Heating with a heater> JPEG2026005163000002.jpg5270

[0092] <Comparison of morphology between Example and Comparative Example at 155°C> JPEG2026005163000003.jpg5270

[0093] As shown above, the comparative example (left side of the photo, BSGHH con) begins to lose its shape at 140°C before reaching 160°C, the foaming initiation temperature of the APP-pentaerythritol polymer, while the example of the present invention (right side of the photo, REMiTIiE) maintains its shape until it reaches the foaming temperature.

[0094] If the comparative example is installed as a fire retardant in a wall penetration, in the event of a fire, the fire retardant will lose its shape before reaching its expansion temperature, creating a large space in the penetration, from which flames and smoke can spread.

[0095] In contrast, in the case of the embodiment, when a fire occurs, the original shape is maintained until the foaming temperature is reached, so that the foam can foam normally and effectively block flames and smoke.

[0096] The technical concept of the present invention has been explained above using the examples.

[0097] It will be apparent to those skilled in the art that the present invention can be modified or changed in various ways from the description of the present invention.

[0098] Furthermore, even if not explicitly shown or described, it is clear to a person having ordinary knowledge in the technical field to which the present invention pertains that various modifications including the technical idea of ​​the present invention are possible from the description of the present invention, and these also fall within the scope of the present invention.

[0099] The above-described embodiments described with reference to the accompanying drawings are set forth for the purpose of explaining the present invention, and the scope of the present invention is not limited to such embodiments. [Explanation of symbols]

[0100] 10 Cable 100 Fire protection equipment 101 Body 102 holes 110 Combing 111 Through hole 112 flange 130 Fireproof resin composition 131 Internal Die 132 External Die 133 bar 134 Molded objects

Claims

1. a dissolving step of adding 100 parts by weight of water, 10 to 30 parts by weight of pentaerythritol (PE), 5 to 30 parts by weight of melamine resin powder, and 30 to 60 parts by weight of ammonium polyphosphate (APP) to a tank and heating at 100°C for 2 to 3 hours; a reaction step of further mixing 30 to 60 parts by weight of ammonium polyphosphate with 10 to 50 parts by weight of a liquid urea resin obtained by mixing 40 to 80 wt% of water and 20 to 60 wt% of a urea resin, and 0.2 to 1.0 part by weight of ammonium chloride, and stirring the mixture at a boil to produce an APP-pentaerythritol polymer; The maturation stage involves stopping the stirring and letting the mixture mature and harden at room temperature for 2 to 4 hours. a grinding step of grinding the APP-pentaerythritol polymer in a lump to a particle size of 100 to 300 mesh; a mixing step of mixing 30 to 200 parts by weight of the APP-pentaerythritol polymer powder and 0.1 to 3.0 parts by weight of a platinum catalyst with 100 parts by weight of a silicone resin.

2. 2. The method for preparing a fireproof resin composition according to claim 1, wherein 5 to 30 parts by weight of graphite is further mixed with 100 parts by weight of the silicone resin in the mixing step.

3. 2. The method for preparing a fireproof resin composition according to claim 1, wherein 7 to 15 parts by weight of silicone oil is further mixed with 100 parts by weight of the silicone resin in the mixing step.

4. 2. The method for preparing a fireproof resin composition according to claim 1, wherein 1 to 5 parts by weight of epoxy silane is further mixed with 100 parts by weight of the silicone resin in the mixing step.

5. A fire retardant device obtained by extrusion molding a fire retardant resin composition produced by the production method according to any one of claims 1 to 4.

6. The fire retardant according to claim 5, wherein the fire retardant is sleeve-shaped and has a length of 50 to 70 mm.

7. The fireproof resin composition produced by the method according to any one of claims 1 to 4 is extruded in a molten state between an outer die (132) and an inner die (131) so as to form a pipe shape, By inserting a rod (133) onto the central axis of the inner die (131), the fireproof resin composition hardens in close contact with the outer surface of the rod (133), forming a sleeve-shaped molding (134). A method for manufacturing a fire retardant, characterized in that the molded product (134) is cut at predetermined intervals to manufacture the fire retardant (100).

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