Powder-type raw material with non-combustible properties

Abstract

The present invention relates to a powder-type raw material having non-combustible performance. A powder-type raw material having non-combustible performance according to one embodiment of the technical concept of the present invention comprises PVC resin, a plasticizer, ammonium polyphosphate (APP), pentaerythritol (C5H12O4), aluminum hydroxide (Al(OH)3), perfluoro(2-methyl-3-pentanone), glass fiber, perlite, a flame retardant, a crosslinking agent, and a heat stabilizer. The powder-type raw material having non-combustible performance according to various embodiments of the technical concept of the present invention, by composing the powder-type raw material using an eco-friendly non-combustible material, can prevent casualties and property damage caused by fire by suppressing the spread of fire and the generation of toxic gases while simultaneously blocking heat conduction.

Description

Technology Field

[0001] The present invention relates to a powder-type raw material having non-combustible performance, and more specifically, to a powder-type raw material having non-combustible performance that can prevent casualties and property damage caused by fire by suppressing the spread of fire and the generation of toxic gases while simultaneously blocking heat conduction by composing the powder-type raw material using an eco-friendly non-combustible material. Background Technology

[0003] Generally, buildings are broadly classified into structural frames and interior and exterior materials. While building materials used for structural frames may vary depending on the building, representative examples include reinforced concrete, steel, wood, and brick, while interior and exterior materials can be classified into gypsum, wood, synthetic resin, and urethane foam.

[0004] Traditionally, non-combustible and insulating materials used in Korea have been organic chemical products such as gypsum board, styrofoam, glass wool, or ceramic fiber.

[0005] These organic chemical products burn easily in the event of a fire and generate toxic gases, resulting in suffocation and loss of life and property. Although there has been an endless demand for the development of building materials such as non-combustible and insulating materials, the technology for suitable materials is reaching its limits due to various problems such as economic feasibility and constructability.

[0006] Among plastics, thermoplastic resins are lightweight and possess excellent moldability and compatibility with other products; in particular, PVC resin (polyvinyl chloride) is widely used in various products and construction materials due to its good moldability and durability.

[0007] However, thermoplastic resins such as PVC generate large amounts of hydrogen chloride gas during a fire and can be a source of dioxins and other pollutants when incinerated; therefore, recently, plastics are being made flame-retardant by adding metal hydroxides (magnesium hydroxide, aluminum hydroxide) that produce hydroxyl groups (-OH) upon combustion to provide a flame-retardant effect.

[0008] However, flame-retardant plastics still have insufficient flame retardancy to be used as interior finishing materials for buildings.

[0009] In other words, in order to be used as a finishing material for buildings, it must comply with the standards for flame-retardant or semi-noncombustible materials as stipulated in Ministry of Land, Infrastructure and Transport Notice No. 2015-744 (Standards for Flame-retardant Performance and Fire Spread Prevention Structures of Building Finishing Materials); however, existing flame-retardant plastics have limitations in that they cannot be mass-produced with the quality required by the Ministry's notice standards.

[0010] If large amounts of metal hydroxides are used to satisfy the flame retardant performance requirements set by the Ministry of Land, Infrastructure and Transport, the melting index (MI) of the plastic drops significantly. Consequently, mass production via methods such as extrusion or injection molding is impossible, and commercialization has not been achieved.

[0011] Furthermore, using halogen-based flame retardants in addition to metal hydroxides to improve productivity presents limitations, including environmental issues and non-compliance with the gas toxicity test (assessment of combustion toxicity using laboratory animals) prescribed by the Ministry of Land, Infrastructure and Transport. Prior art literature

[0013] Korean Registered Patent No. 10-2598699 (Registered November 01, 2023) Korean Registered Patent No. 10-2579450 (Registered September 12, 2023) Korean Registered Patent No. 10-2768700 (Registered February 12, 2025) The problem to be solved

[0014] The problem that the present invention aims to solve is to provide a powder-type raw material having non-combustible performance that can prevent casualties and property damage caused by fire by suppressing the spread of fire and the generation of toxic gases while blocking heat conduction by composing the powder-type raw material using an eco-friendly non-combustible material.

[0015] In addition, another problem that the present invention aims to solve is to provide a powder-type raw material having non-combustible performance that can be applied to the manufacture of non-combustible materials in various fields, such as flame-retardant paint, non-combustible plastic, non-combustible wire, non-combustible styrofoam, and non-combustible FRP, using a powder-type raw material containing an eco-friendly non-combustible material.

[0016] The various problems that the present invention aims to solve are not limited to those mentioned above, and other unmentioned problems will be clearly understood by those skilled in the art from the description below. means of solving the problem

[0018] In one embodiment of the technical concept of the present invention, a powder-type raw material having non-combustible performance is disclosed.

[0019] The above-mentioned powder-type raw material exhibiting non-combustible performance comprises PVC resin, a plasticizer, ammonium polyphosphate (APP), and pentaerythritol (C5H 12 It includes O4), aluminum hydroxide (Al(OH)3), perfluoro(2-methyl-3-pentanone), glass fiber, perlite, flame retardant, crosslinking agent, and heat stabilizer.

[0020] 30 to 40 parts by weight of the above PVC resin, 20 to 30 parts by weight of a plasticizer, 10 to 20 parts by weight of ammonium polyphosphate (APP), and pentaerythritol (C5H 12It may be included in a weight ratio of 5 to 10 parts by weight of O4, 1 to 5 parts by weight of aluminum hydroxide (Al(OH)3), 5 to 15 parts by weight of perfluoro(2-methyl-3-pentanone), 1 to 5 parts by weight of glass fiber, 2 to 8 parts by weight of perlite, 5 to 10 parts by weight of flame retardant, 20 to 40 parts by weight of crosslinking agent, and 5 to 15 parts by weight of heat stabilizer.

[0021] Dioctyl terephthalate (DOTP) may be used as the plasticizer, and melamine phosphate may be used as the flame retardant.

[0022] Di-(tert-butylperoxyisopropyl)benzene is used as the crosslinking agent, and a calcium / zinc stabilizer may be used as the heat stabilizer.

[0023] Specific details of other embodiments are included in the detailed description. Effects of the invention

[0025] A powder-type raw material having non-combustible performance according to various embodiments of the technical concept of the present invention can prevent casualties and property damage caused by fire by suppressing the spread of fire and the generation of toxic gases while simultaneously blocking heat conduction by composing the powder-type raw material using an eco-friendly non-combustible material.

[0026] In addition, powder-type raw materials having non-combustible performance according to various embodiments of the technical concept of the present invention can be applied to the manufacture of non-combustible materials in various fields, such as flame-retardant paint, non-combustible plastic, non-combustible wire, non-combustible styrofoam, and non-combustible FRP, by using powder-type raw materials containing eco-friendly non-combustible materials.

[0027] It will be fully understood that embodiments of the technical concept of the present invention may provide various effects not specifically mentioned. Brief explanation of the drawing

[0029] Figure 1a is a photograph showing the flame test results of a plastic molded body prepared according to Example 1. Figure 1b is a photograph showing the flame test results of a plastic molded body manufactured according to a comparative example. Specific details for implementing the invention

[0030] The advantages and features of the present invention, and the methods for achieving them, will become clear by referring to the embodiments described in detail below. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided to ensure that the disclosed content is thorough and complete, and to ensure that the spirit of the present invention is sufficiently conveyed to those skilled in the art.

[0031] The terms used in this application are used merely to describe specific embodiments and are not intended to limit the invention. The singular expression includes the plural expression unless the context clearly indicates otherwise.

[0032] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this application.

[0034] Hereinafter, a preferred embodiment of a powder-type raw material having non-combustible performance according to one embodiment of the technical concept of the present invention will be described in detail.

[0036] A powder-type raw material having non-combustible performance according to one embodiment of the technical concept of the present invention comprises PVC resin, a plasticizer, ammonium polyphosphate (APP), and pentaerythritol (C5H 12 It includes O4), aluminum hydroxide (Al(OH)3), perfluoro(2-methyl-3-pentanone), glass fiber, perlite, flame retardant, crosslinking agent, and heat stabilizer.

[0038] Specifically, a powder-type raw material having non-combustible performance according to one embodiment of the technical concept of the present invention comprises 30 to 40 parts by weight of PVC resin, 20 to 30 parts by weight of a plasticizer, 10 to 20 parts by weight of ammonium polyphosphate (APP), and pentaerythritol (C5H 12It may be included in a weight ratio of 5 to 10 parts by weight of O4, 1 to 5 parts by weight of aluminum hydroxide (Al(OH)3), 5 to 15 parts by weight of perfluoro(2-methyl-3-pentanone), 1 to 5 parts by weight of glass fiber, 2 to 8 parts by weight of perlite, 5 to 10 parts by weight of flame retardant, 20 to 40 parts by weight of crosslinking agent, and 5 to 15 parts by weight of heat stabilizer.

[0040] The aforementioned PVC resin refers to polyvinyl chloride. It is a thermoplastic resin produced by polymerizing vinyl chloride monomer (VCM) and can be divided into rigid PVC and flexible PVC. Generally, it possesses high mechanical and tensile strengths, and because it contains chlorine atoms, it has the property of self-extinguishing even if ignited, making it advantageous for suppressing combustion in the event of a fire.

[0041] Furthermore, the aforementioned PVC resin exhibits excellent chemical resistance, making it highly resistant to most chemicals such as acids, alkalis, and salts. It also possesses superior electrical insulation properties, making it widely used as a sheathing material for wires and cables. Additionally, it absorbs very little water, making it resistant to moisture and stable even underwater. Moreover, it is easy to process, allowing for various methods such as cutting, bonding, welding, and painting.

[0042] In addition, while the above PVC resin is widely used in outdoor products due to its excellent resistance to ultraviolet rays and climate change, it begins to decompose at a temperature of about 170°C and may gradually release hydrogen chloride (HCl) and discolor at temperatures above 100°C, so additives such as heat stabilizers are essential during processing.

[0044] The aforementioned plasticizer is a substance added to improve the flexibility, processability, and elongation of PVC resin, a polymer material. When added to PVC resin, it makes the material soft and flexible, lowers viscosity and improves workability during processing (injection, extrusion, calendering), and is inserted between polymer chains to weaken inter-chain interactions and lower the glass transition temperature (Tg), thereby increasing the flexibility and elasticity of the material.

[0045] For example, dioctyl terephthalate (DOTP) can be used as the plasticizer. Dioctyl terephthalate (DOTP) is a non-phthalate plasticizer widely used in PVC resins, exhibiting environmental friendliness and excellent performance, and is chemically an ester of terephthalic acid and 2-ethylhexanol.

[0046] Specifically, the above dioctyl terephthalate (DOTP) has the chemical formula C 24 H 38 It is O4, a colorless to pale yellow liquid with a density of approximately 0.98 g / cm³ 3 It has a boiling point of about 400°C, excellent heat resistance so it is stable even at temperatures above 250°C, excellent thermal stability, and excellent chemical resistance so it is stable against acids, alkalis, and water.

[0048] The above-mentioned ammonium polyphosphate (APP) is a compound formed by the combination of phosphoric acid and ammonia; it is a polymeric compound primarily used as a flame retardant and fertilizer, and the ammonium ion (NH4 + ) and polyphosphate ions ((PO3 - ) n It is a compound formed by the combination of ).

[0049] Specifically, the above-mentioned ammonium polyphosphate is in the form in which ammonium ions are bonded to phosphate chains, and is divided into various grades (APP-I, APP-II, etc.) according to the degree of polymerization, and is in the form of a white powder or crystal. APP-I is highly soluble in water, but APP-II has low solubility due to its high degree of polymerization and has excellent thermal stability, decomposing at temperatures of 250 to 300°C or higher to exhibit flame-retardant properties. When exposed to heat, the ammonium polyphosphate releases ammonia and water, and the phosphate forms a char layer to block the supply of oxygen and suppress the spread of fire, thereby exhibiting excellent flame-retardant properties.

[0050] In addition, the above-mentioned ammonium polyphosphate enhances flame retardancy to improve fire safety and is an environmentally friendly halogen-free flame retardant that can comply with environmental regulations (RoHS, REACH). It is also stable in extrusion and heat curing processes for manufacturing flame-retardant paints, non-combustible plastics, non-combustible wires, non-combustible styrofoam, non-combustible FRP, etc., using powder-type raw materials.

[0052] The above pentaerythritol (C5H 12 O4) is a polyol with four hydroxyl groups (-OH) and is mainly used as a raw material for resins, paints, explosives, flame retardants, and lubricant additives.

[0053] Specifically, the above pentaerythritol is a white crystalline solid (powder or granule), has a melting point of about 260–262°C, is slightly soluble in water (5–6 g / 100 mL, 20°C), has low solubility in alcohol and acetone, and has excellent thermal stability, decomposing at temperatures above 200°C and forming carbon-based residues (char) upon oxidation or thermal decomposition, thereby enhancing flame retardancy.

[0054] In addition, the above-mentioned pentaerythritol is a multi-purpose chemical that is used as a char-forming agent in an intumescent flame retardant system together with ammonium polyphosphate (APP), forms a char layer when exposed to heat to block oxygen and heat, is used in the manufacture of alkyd resins, polyesters, and polyurethanes, and can be used as a heat-resistant lubricant or plasticizer.

[0056] The above aluminum hydroxide (Al(OH)3) is an aluminum hydroxide that has a white amorphous powder or crystalline form and is a versatile inorganic compound widely used in industrial, pharmaceutical, firefighting, and environmental fields. The above aluminum hydroxide releases water through an endothermic reaction at a temperature of 230 to 300°C, lowers the ambient temperature, and dilutes the oxygen concentration to suppress combustion. Although it does not form a carbon film, it can exhibit a synergistic effect when used together with ammonium polyphosphate and pentaerythritol.

[0058] The above perfluoro(2-methyl-3-pentanone) is a perfluorinated ketone compound, with the chemical formula C6F 12 It is O, and commercially, Novec TM It is known by the ISO designation 1230 (3M product name) or FK-5-1-12 and is mainly used as a clean agent fire suppressant.

[0059] One of the most important uses of the above-mentioned perfluoro(2-methyl-3-pentanone) is as a clean fire extinguishing agent, which primarily extinguishes fires through a physical cooling effect that breaks the chain reaction, and can lower the combustion temperature by rapidly vaporizing and absorbing heat when sprayed after being stored in a liquid state.

[0060] In addition, the above perfluoro(2-methyl-3-pentanone) is environmentally friendly, has an ozone depletion potential (ODP) of 0, a very low global warming potential (GWP) of 1.0, and has a short atmospheric lifetime (ALT) (about 0.014 years), so it has minimal impact on the environment. It is also highly volatile, leaving no residue after extinguishing fires, making it particularly suitable for places where water or powder extinguishing agents could cause damage, such as electronic equipment, server rooms, museums, and archives. It has low toxicity to humans and can be applied in places where human safety is the top priority.

[0062] The glass fiber mentioned above is an inorganic non-metallic material in the form of fibers produced by finely drawing silicon (SiO2)-based glass. It is much thinner than ordinary fibers, has a diameter of several micrometers (μm), is lightweight, and has high strength and heat resistance, so it is used as a reinforcing material for various composite materials and is also called glass fiber or glass wool.

[0063] These glass fibers not only possess excellent heat resistance, corrosion resistance, moisture resistance, thermal insulation, and sound absorption properties, but also have the characteristic that tensile strength and flexibility increase as the diameter of the glass fibers decreases; therefore, they are widely used in a wide variety of industrial fields, such as raw materials for reinforced plastics, electrical insulation materials, battery separators, sound-absorbing (soundproofing) materials, thermal insulation materials, decorative fabrics, and filters.

[0064] Specifically, the glass fiber is made of glass raw materials (inorganic materials such as silica, lime, and alumina) and has excellent non-combustibility, meaning it does not burn on its own. It does not burn like carbon-based materials even at high temperatures, and when exposed to flames, it simply softens or melts without producing flames. It also has excellent high heat resistance, maintaining structural stability up to 400 to 600°C, and has high fire safety as it produces almost no harmful gases even when heat is applied.

[0065] In addition, the glass fiber has excellent thermal insulation properties, with an air layer formed between the fiber structures resulting in low thermal conductivity (approximately 0.035 to 0.045 W / m·K). It possesses both non-combustibility and thermal insulation properties, contributing to the prevention of fire spread and energy saving in buildings. It also plays a role in reducing noise inside and outside the building by absorbing sound waves through its porous structure. Unlike organic insulation materials (e.g., urethane foam, styrofoam) that generate toxic gases upon combustion, glass fiber produces almost no gas, which is advantageous for reducing casualties.

[0067] The above-mentioned perlite is a porous, lightweight inorganic material made by expanding volcanic glass at high temperatures. When heated at high temperatures, the moisture contained within evaporates, causing it to expand into porous fine particles. This expanded perlite is used as an insulating and fire-retardant material in the construction and industrial fields.

[0068] Typically, expanded perlite is formed by the rapid cooling of highly viscous perlite lava; it possesses a fine-grained or pearly luster and is usually gray or green, although some varieties are brown, blue, or red. This expanded perlite is produced by crushing and drying rocks that have concentric cracks breaking into small, pearl-shaped fragments, followed by instantaneous expansion in a high-temperature baking furnace; it is a natural glass containing more than 70% natural SiO2. Generally, products made by firing and expanding perlite at 1,000 to 1,300°C are collectively referred to as expanded perlite, and they have a specific gravity of 0.1 to 0.25.

[0069] The above perlite has excellent non-combustibility, being made of natural inorganic minerals (volcanic glass) so it does not burn, does not catch fire even when exposed to flames, and does not generate harmful gases. It also has excellent high heat resistance, so its structure remains stable even at high temperatures of 800 to 1000°C or higher. It has a porous structure containing a large amount of air, so it has low thermal conductivity (at the level of 0.040 to 0.060 W / m·K). When heated and expanded, it expands to more than 10 to 20 times its original volume, making it lightweight. It has many internal micropores, which contribute to thermal insulation, sound absorption, and fire resistance, and because it is inorganic, it does not generate toxic gases in the event of a fire.

[0071] The flame retardant mentioned above is a substance added to suppress or delay the occurrence, spread, and combustion speed of a fire. It reduces fire hazards by disrupting the combustion triangle between heat, oxygen, and fuel, increases the ignition time of the material, and reduces flame propagation.

[0072] In other words, the flame retardant can form a char layer through solid-phase action to block oxygen and heat, capture radicals during the combustion process through gaseous-phase action to suppress chain reactions, absorb heat through endothermic action to lower the combustion temperature, reduce smoke generation, and minimize the release of toxic gases.

[0073] For example, melamine phosphate may be used as the flame retardant. Melamine phosphate is a complex of phosphorus-based and nitrogen-based flame retardants and is a compound of melamine and phosphoric acid. It is mainly used in the combined form of melamine and phosphoric acid (e.g., melamine monophosphate, melamine polyphosphate), and melamine polyphosphate (MPP) is the most common. MPP is a high-efficiency flame retardant that enhances the flame retardancy of PVC resin and provides a smoke suppression effect.

[0074] When the above melamine phosphate is thermally decomposed, the melamine releases nitrogen gas (N2), and the phosphoric acid forms a carbonized layer and expands when exposed to heat to create an insulating layer, dilutes the combustion gas with nitrogen gas, and can reduce the generation of smoke.

[0076] The above crosslinking agent is an additive that chemically or physically links the molecular chains of PVC resin to form a three-dimensional network structure, and through the crosslinking reaction, it improves the mechanical strength, elasticity, heat resistance, and chemical resistance of the material and can convert from thermoplastic to thermosetting or high-elasticity properties.

[0077] The above-mentioned crosslinking agent can form covalent bonds (chemical crosslinking) or hydrogen bonds / ionic bonds (physical crosslinking) between polymer chains, build a three-dimensional network, improve mechanical properties such as tensile strength, elongation, and compressive permanent strain, enhance wear resistance, and increase stability in high temperature, solvent, and oxidizing environments.

[0078] For example, di-(tert-butylperoxyisopropyl)benzene can be used as the crosslinking agent. Di-(tert-butylperoxyisopropyl)benzene is an organic peroxide-based crosslinking agent used in the crosslinking reaction of PVC resin. It decomposes upon heat to generate free radicals and links polymer chains to form a three-dimensional network structure. Through this, the mechanical strength, elasticity, and heat resistance of flame-retardant paints, non-combustible plastics, non-combustible wires, non-combustible styrofoam, and non-combustible FRP manufactured from powder-type raw materials can be improved.

[0080] The aforementioned heat stabilizer plays a role in indirectly enhancing the durability and non-flammability of materials by suppressing thermal decomposition (e.g., HCl generation) during the processing of thermoplastic resins such as PVC (Polyvinyl Chloride). This contributes to maintaining non-flammability performance by preventing color changes, reduction in strength, or chemical decomposition when the material is exposed to high temperatures.

[0081] Examples of the aforementioned heat stabilizers include calcium / zinc stabilizers (Ca-Zn stabilizers), hydrotalcite-based stabilizers (LDH), phosphorus-based stabilizers (Phosphite, Phosphate stabilizers), antimony compounds (Sb2O3, etc.), and tin-based stabilizers (Organotin stabilizers). The calcium / zinc stabilizer (Ca-Zn stabilizer) is widely used in PVC, non-combustible resins, and coating binders; it is an eco-friendly alternative to lead stabilizers and is effective in inhibiting decomposition during high-temperature processing and maintaining color stability. The hydrotalcite-based stabilizer (LDH), having an Mg-Al dihydroxide structure, stabilizes the resin while absorbing acidic byproducts (e.g., HCl) and simultaneously provides flame retardancy (endothermic decomposition, flame blocking) effects.

[0082] In addition, the above-mentioned phosphorus-based stabilizers include tris(biphenyl)phosphate (TBP) and alkyl phosphites, which improve high-temperature oxidation stability to prevent resin degradation and simultaneously ensure flame retardancy and processing stability, and the above-mentioned antimony compounds (Sb2O3, etc.) are flame retardant adjuvants that enhance thermal stability and non-flammability when used in combination with halogen-based flame retardants, and the above-mentioned tin-based stabilizers include methyltin and butyltin compounds, which provide a strong thermal stabilization effect on resins such as PVC.

[0083] For example, a calcium / zinc stabilizer (Ca-Zn stabilizer) may be used as the heat stabilizer. The calcium / zinc stabilizer (Ca-Zn stabilizer) is a non-toxic stabilizer having a powder-like Ca-Zn-based form. Depending on the form, it is classified as a powder, liquid, paste, or granule stabilizer. Depending on the form, it can be divided into Cd-Ba-Zn, Cd-Ba, Ba-Zn, Ca-Zn, Na-Za, Sn, Pb, Cd, and Zn systems. Depending on the application, it can be divided into soft, hard, or calendered forms, and can be classified for foaming, sheet and leather processing, SOL processing, or heat resistance.

[0084] In the present invention, it is preferable to use a Ca-Zn-based stabilizer, which is widely used in food packaging materials, toys, food containers, and medical devices, as a non-toxic stabilizer, and the said Ca-Zn-based stabilizer can be considered a representative environmentally friendly stabilizer.

[0086] Hereinafter, with reference to the attached drawings, an example of a powder-type raw material having non-combustible performance according to one embodiment of the technical concept of the present invention will be described in more detail.

[0088] < Example 1 >

[0089] 35 parts by weight of PVC resin, 25 parts by weight of plasticizer, 15 parts by weight of ammonium polyphosphate (APP), pentaerythritol (C5H 12A plastic molded article was prepared by mixing 8 parts by weight of O4, 3 parts by weight of aluminum hydroxide (Al(OH)3), 10 parts by weight of perfluoro(2-methyl-3-pentanone), 3 parts by weight of glass fiber, 5 parts by weight of perlite, 7 parts by weight of flame retardant, 30 parts by weight of crosslinking agent, and 10 parts by weight of heat stabilizer, and then processing the mixture.

[0090] At this time, dioctyl terephthalate (DOTP) was used as the plasticizer, melamine phosphate was used as the flame retardant, di-(tert-butylperoxyisopropyl)benzene was used as the crosslinking agent, and a calcium / zinc stabilizer (Ca-Zn stabilizer) was used as the heat stabilizer.

[0092] < Example 2 >

[0093] 38 parts by weight of PVC resin, 22 parts by weight of plasticizer, 19 parts by weight of ammonium polyphosphate (APP), pentaerythritol (C5H 12 A plastic molded article was prepared by mixing 6 parts by weight of O4, 4 parts by weight of aluminum hydroxide (Al(OH)3), 7 parts by weight of perfluoro(2-methyl-3-pentanone), 4 parts by weight of glass fiber, 3 parts by weight of perlite, 9 parts by weight of flame retardant, 23 parts by weight of crosslinking agent, and 13 parts by weight of heat stabilizer, and then processing the mixture.

[0094] At this time, dioctyl terephthalate (DOTP) was used as the plasticizer, melamine phosphate was used as the flame retardant, di-(tert-butylperoxyisopropyl)benzene was used as the crosslinking agent, and a calcium / zinc stabilizer (Ca-Zn stabilizer) was used as the heat stabilizer.

[0096] < Comparative Example >

[0097] A plastic molded article was manufactured by mixing 40 parts by weight of PVC resin, 25 parts by weight of plasticizer, 5 parts by weight of aluminum hydroxide (Al(OH)3), 10 parts by weight of expanded graphite powder, 5 parts by weight of glass fiber, 10 parts by weight of flame retardant, 20 parts by weight of crosslinking agent, and 15 parts by weight of heat stabilizer, and then processing the mixture.

[0098] At this time, dioctyl terephthalate (DOTP) was used as the plasticizer, melamine phosphate was used as the flame retardant, di-(tert-butylperoxyisopropyl)benzene was used as the crosslinking agent, and a calcium / zinc stabilizer (Ca-Zn stabilizer) was used as the heat stabilizer.

[0100] < Experimental Example >

[0101] 1. Smoke density, toxic gases, and flame propagation

[0102] The smoke density, toxic gas, and flame propagation of the plastic molded bodies prepared according to Examples 1 and 2 were measured, and the results are shown in [Table 1] below.

[0103] Smoke density and toxic gas measurements were performed using the ISO 5659-2 combustion chamber test method.

[0104] item Smoke density toxic gas flame propagation 50kw non-flame HCl CO Critic Flux standard < 500ppm < 600ppm < 1450ppm > 7W / m 2 Example 1 264 322 525 10.8 Example 2 275 332 534 10.1

[0105] Referring to [Table 1] above, it can be confirmed that the plastic molded body manufactured according to Examples 1 and 2 has a stable and excellent effect by reducing smoke density and toxic gases generated by combustion during a fire.

[0107] 2. Measurement of total heat release rate and smoke generation

[0108] The total heat release rate and fume emitting properties of the plastic molded articles prepared according to Examples 1 and 2 above were measured, the measurement criteria for this are shown in [Table 2] below, and the measurement results are shown in [Table 3] below.

[0109] rating Test items Test conditions Conformity criteria Non-combustible material (Grade 1) Non-combustible (burned by electricity) Temperature difference between maximum temperature and final equilibrium temperature (°C) 750℃, 20 minutes of combustion 20℃ or lower Mass reduction rate 30% or less Gas toxicity Average time to stop action mouse 9 minutes or more Semi-noncombustible material (Grade 2) Cone calorimeter Total barrel ejection (MJ / m²) 2 ) Approx. 800℃, 10 minutes of combustion 8 MJ / m 2 below The heat release rate is 20 kW / m² 2 Time (seconds) exceeding 10 seconds or less Changes such as total melting of the core material, penetrating cracks, and holes naked eye There will be no cracks, holes, or melting in the core material. Gas toxicity Average time to stop action mouse 9 minutes or more Flame-retardant material (Grade 3) Cone calorimeter Total barrel ejection (MJ / m²) 2 ) Approx. 800℃, 5 minutes of combustion 8 MJ / m 2 below The heat release rate is 20 kW / m² 2 Time (seconds) exceeding 10 seconds or less Changes such as total melting of the core material, penetrating cracks, and holes naked eye There will be no cracks, holes, or melting in the core material. Gas toxicity Average time to stop action mouse 9 minutes or more

[0110] Example 1 Example 2 standard Cone calorimeter Total emission rate (MJ / m²) 2 ) 4.11 4.16 8 MJ / m 2 below The heat release rate is 20 kW / m² 2 Time (seconds) exceeding 0 0 10 seconds or less Changes such as total melting of the core material, penetrating cracks, and holes doesn't exist doesn't exist There will be no cracks, holes, or melting in the core material. emitting smoking doesn't exist doesn't exist - verdict Flame Retardant Class 2 Equivalent Flame Retardant Class 2 Equivalent

[0111] As shown in [Table 3] above, it was confirmed that the plastic molded bodies manufactured according to Examples 1 and 2 exhibited excellent non-combustibility and thermal insulation properties, corresponding to flame retardancy class 2.

[0113] 3. Flame Test Experiment

[0114] A flame test was performed on a plastic molded body prepared according to Example 1 and a plastic molded body prepared according to Comparative Example.

[0116] Figure 1a is a photograph showing the flame test results of a plastic molded body manufactured according to Example 1, and Figure 1b is a photograph showing the flame test results of a plastic molded body manufactured according to a comparative example.

[0118] Referring to FIGS. 1a and 1b, it can be seen that the plastic molded body manufactured according to Example 1 (Fig. 1a) maintains its shape after combustion, whereas the plastic molded body manufactured according to Comparative Example (Fig. 1b) does not maintain its shape after combustion and the combustion residue is scattered or broken.

[0120] Although a preferred embodiment of the present invention has been described above with reference to the attached drawings, those skilled in the art will understand that the present invention may be implemented in other specific forms without altering its technical concept or essential features. Therefore, the embodiment described above should be understood as illustrative in all respects and not restrictive.

Claims

Claim 1 35 parts by weight of PVC resin, 25 parts by weight of plasticizer, 15 parts by weight of ammonium polyphosphate (APP), pentaerythritol (C5H 12 It comprises 8 parts by weight of O4, 3 parts by weight of aluminum hydroxide (Al(OH)3), 10 parts by weight of perfluoro(2-methyl-3-pentanone), 3 parts by weight of glass fiber, 5 parts by weight of perlite, 7 parts by weight of flame retardant, 30 parts by weight of crosslinking agent, and 10 parts by weight of heat stabilizer, wherein dioctyl terephthalate (DOTP) is used as the plasticizer, melamine phosphate is used as the flame retardant, di-(tert-butylperoxyisopropyl)benzene is used as the crosslinking agent, and calcium / zinc stabilizer (Ca-Zn) A powder-type raw material having non-combustible performance characterized by the use of a stabilizer. Claim 2 delete Claim 3 delete Claim 4 delete

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