Composition for non-combustible thermal expansion member having flexibility, and non-combustible thermal expansion member having flexibility manufactured using same

Abstract

The present invention provides a composition for a non-combustible thermal expansion member having flexibility, and a non-combustible thermal expansion member having flexibility manufactured using same.

Description

Composition for a flexible, non-flammable thermal expansion member and a flexible, non-flammable thermal expansion member manufactured using the same

[0001] The present invention relates to a composition for a flexible, non-flammable thermal expansion member and a flexible, non-flammable thermal expansion member manufactured using the same.

[0002] In the construction, industrial, and transportation sectors, there is a high demand for non-combustible materials to ensure fire safety. In particular, there is a growing need for non-combustible thermally expanding materials that can self-expand in high-temperature environments upon the occurrence of a fire to block the conduction of flames and heat, and to prevent the spread of smoke and toxic gases. Compositions for manufacturing such non-combustible thermally expanding materials are generally polymer composites containing thermally expanding resins, inorganic expansion agents, and flame retardants; by expanding at high temperatures to form a protective layer, these materials can improve the fire resistance performance of buildings, steel structures, piping, electrical and electronic components, and the like.

[0003] Conventional compositions for non-combustible thermal expansion materials have utilized halogen-based or antimony-based flame retardants to enhance flame retardant performance; however, halogen-based flame retardants (e.g., bromine-based and chlorine-based flame retardants) pose a risk of releasing toxic gases upon combustion, and their use is becoming increasingly restricted due to stricter environmental regulations. Additionally, while antimony-based flame retardants (e.g., antimony trioxide) offer excellent flame retardant effects when used in combination with halogen-based materials, they are toxic and harmful to humans and the environment, leading to moves toward regulatory restrictions. Furthermore, materials utilizing these existing non-combustible thermal expansion compositions suffer from issues such as insufficient expansion rates or the generation of airborne particles during expansion. Moreover, materials made with these compositions lack sufficient flexibility; consequently, they fail to provide adequate fire prevention and smoke leakage protection when applied to curved sections or when cracks form during expansion caused by fire.

[0004] Due to these issues, there has recently been a growing demand for compositions that can secure flexibility and fire resistance performance while using materials that are friendly to the human body and the environment; however, the development of compositions that can simultaneously satisfy flexibility and non-flammability remains insufficient.

[0005] [Prior Art Literature]

[0006] [Patent Literature]

[0007] Republic of Korea Registered Patent Publication 10-1132689

[0008] The present invention aims to provide a composition for a non-combustible thermal expansion member having flexibility that ensures flexibility and sufficient fire resistance in the event of a fire, and a non-combustible thermal expansion member having flexibility manufactured using the same.

[0009] However, the technical 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.

[0010] One embodiment of the present invention provides a composition for a flexible, non-flammable thermal expansion member comprising: a polymer matrix comprising 20 to 50 parts by weight of polyvinyl chloride (PVC); 5 to 40 parts by weight of a phosphorus-based flame-retardant plasticizer; 10 to 50 parts by weight of a thermal expansion agent; and 1 to 10 parts by weight of a heat stabilizer comprising at least one of an acetylacetonate-based compound and a hydrotalcite-based compound.

[0011] Another embodiment of the present invention provides a flexible, non-flammable thermal expansion member manufactured using the above composition.

[0012] The flexible, non-combustible thermal expansion member composition according to the present invention has the advantage of being easy to process into members of various shapes by injection or extrusion. Furthermore, a member manufactured using the flexible, non-combustible thermal expansion member composition can effectively seal off the zone causing fire spread in the event of a fire, thereby preventing fire spread and the diffusion of toxic gases. Additionally, since the member possesses high flexibility, it has the advantage of being effectively applicable to various shaped locations, including curved sections.

[0013] The effects of the present invention are not limited to those mentioned above, and other unmentioned effects will be clearly understood by a person skilled in the art from the description below.

[0014] Figure 1 shows the pellets prepared in Example 1 and the sheet-like member using them.

[0015] Figure 2 shows an image of performing a venting test according to Experimental Example 1.

[0016] Figure 3 shows a bending test image of a member according to Example 3.

[0017] Figure 4 shows an image of a member after thermal expansion according to Examples 1 to 3.

[0018] Figure 5 shows images of the members after thermal expansion according to Comparative Examples 1 and 2.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by a skilled expert in the art to which this invention pertains. In general, the nomenclature used herein is well known and commonly used in the art.

[0020] The present invention is susceptible to various modifications and may have various embodiments, and specific embodiments are to be described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and it should be understood that it includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the present invention. In describing the present invention, detailed descriptions of related prior art are omitted if it is determined that such detailed descriptions may obscure the essence of the present invention.

[0021] The terms used in this specification 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.

[0022] In this specification, terms such as “comprising” or “having” are intended to indicate the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not excluding in advance the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0023] In this specification, when a member is described as being located "on" another member, this includes not only cases where a member is in contact with another member, but also cases where another member exists between the two members.

[0024] In this specification, the unit "parts by weight" may mean the ratio of weight between each component, or the ratio of weight to the total composition.

[0025] In this specification, "A and / or B" means "A and B, or A or B".

[0026] The present invention will be described in detail below.

[0027] One embodiment of the present invention provides a composition for a flexible, non-flammable thermal expansion member comprising: a polymer matrix comprising 20 to 50 parts by weight of polyvinyl chloride (PVC); 5 to 40 parts by weight of a phosphorus-based flame-retardant plasticizer; 10 to 50 parts by weight of a thermal expansion agent; and 1 to 10 parts by weight of a heat stabilizer comprising at least one of an acetylacetonate-based compound and a hydrotalcite-based compound.

[0028] Hereinafter, each component included in the composition for a flexible, non-flammable, thermally expanding member is described in detail. Additionally, in the following description, "member" refers to a flexible, non-flammable, thermally expanding member manufactured using the above composition.

[0029] Polymer matrix

[0030] The above polymer matrix is ​​a polymer matrix formed from a polymer including polyvinyl chloride (PVC), and can serve to fix the components included in the composition.

[0031] According to one embodiment of the present invention, the polymer matrix may be composed of polyvinyl chloride (PVC) alone. Alternatively, the polymer matrix may further include additional polymer materials such as polypropylene (PP) and / or polyethylene (PE) together with polyvinyl chloride (PVC).

[0032] According to one embodiment of the present invention, the polymer matrix may be included in the composition in an amount of 20 to 50 parts by weight, specifically in an amount of 25 to 45 parts by weight, 30 to 45 parts by weight, or 30 to 40 parts by weight. When the polymer matrix is ​​within the above range, the shape of the member can be stably maintained and durability can be ensured, and other components can effectively exhibit flame-resistant performance in the event of a fire.

[0033] Phosphorus-based flame retardant plasticizer

[0034] The above-mentioned phosphorus-based flame-retardant plasticizer can form a phosphate-based protective layer in the event of a fire to block oxygen and suppress thermal decomposition. In addition, it can act as a plasticizer within the polymer matrix to ensure the flexibility of the component.

[0035] According to one embodiment of the present invention, the phosphorus-based flame retardant plasticizer may include at least one selected from the group consisting of triphenyl phosphate, tricrezil phosphate, butylphenyl phosphate, isopropylated triphenyl phosphate, phenyl diisodecyl phosphate, phenyl diisodecyl phosphate, diphenyl isodecyl phosphate, and trinonylphenyl phosphate.

[0036] According to one embodiment of the present invention, the phosphorus-based flame retardant plasticizer may be included in the composition in an amount of 5 to 40 parts by weight, and specifically, may be included in the composition in an amount of 10 to 40 parts by weight, 10 to 30 parts by weight, 15 to 40 parts by weight, 15 to 35 parts by weight, 15 to 30 parts by weight, or 15 to 25 parts by weight. When the content of the phosphorus-based flame retardant plasticizer is within the above range, the processability of the composition may be improved, and furthermore, the flexibility of the member may be secured and oxygen to the fire area may be effectively blocked in the event of a fire.

[0037] According to one embodiment of the present invention, the composition may not include halogen-based flame retardant plasticizers and antimony-based flame retardant plasticizers that may generate toxic gases in the event of a fire. Although the halogen-based flame retardant plasticizers and antimony-based flame retardant plasticizers have the advantage of effectively achieving flame retardant / non-combustible performance, they may release substances harmful to the human body and / or the environment in the event of a fire, and therefore their use is restricted or prohibited in many countries.

[0038] Thermal expansion agent

[0039] The above thermal expansion agent can significantly increase the flame resistance of the material by inducing volume expansion of the material at high temperatures, thereby blocking oxygen to the fire area and blocking heat transfer to the outside.

[0040] According to one embodiment of the present invention, the thermal expansion agent may include at least one selected from the group consisting of expanded graphite, borate, melamine, aluminum hydroxide, aluminum phosphate, phosphate ester, and polysiloxane, and specifically may include expanded graphite.

[0041] According to one embodiment of the present invention, the thermal expansion agent may be included in the composition in an amount of 10 to 50 parts by weight, and specifically, may be included in the composition in an amount of 20 to 50 parts by weight, 30 to 50 parts by weight, 30 to 45 parts by weight, 30 to 40 parts by weight, 35 to 45 parts by weight, or 35 to 40 parts by weight. When the content of the thermal expansion agent is within the above range, it can effectively induce expansion of the member in the event of a fire, thereby blocking oxygen and preventing heat transfer, and thus exhibiting a significant effect in initial fire response.

[0042] Heat stabilizer

[0043] The above-mentioned thermal stabilizer prevents the deterioration and decomposition of a member during a fire, thereby ensuring the structural stability of the member that has expanded due to the occurrence of a fire. Specifically, the thermal stabilizer can delay the decomposition of a polymer matrix, such as polyvinyl chloride, at high temperatures to reduce the amount of thermal decomposition products, such as chlorine compounds, generated during the initial fire, or minimize the thermal decomposition of the polymer matrix to ensure structural stability and minimize the generation of thermal decomposition products from the polymer matrix.

[0044] According to one embodiment of the present invention, the heat stabilizer may include at least one of an acetylacetonate-based compound and a hydrotalcite-based compound. Specifically, the heat stabilizer may be an acetylacetonate-based compound, a hydrotalcite-based compound, or a mixture of an acetylacetonate-based compound and a hydrotalcite-based compound. More specifically, the composition may not include any other substance other than an acetylacetonate-based compound and a hydrotalcite-based compound as a heat stabilizer.

[0045] According to one embodiment of the present invention, the composition may not include other materials acting as heat stabilizers, such as calcium carbonate or glass fiber. Although such materials are components generally applied to semi-noncombustible / noncombustible materials, in the composition according to the present invention, such materials may cause the materials of the member to detach upon thermal expansion, thereby compromising structural stability.

[0046] According to one embodiment of the present invention, the acetylacetonate-based compound may be represented by the following chemical formula 1:

[0047] [Chemical Formula 1]

[0048] M(acac) n

[0049] In the above chemical formula 1,

[0050] M is a metallic element selected from the group consisting of Fe, Co, Ni, Cu, Mn, V, Cr, La, Ce, Eu, Gd, Y, Ti, Zr, Hf, Al, Sn, Li, Na, K, Ca and Ba, and n is an integer from 1 to 4.

[0051] According to one embodiment of the present invention, n is determined according to the oxidation number of the metal bonded to the acetylacetonate (acac), and for example, in the case of calcium acetylacetonate, n may be 2.

[0052] According to one embodiment of the present invention, the hydrotalcite-based compound may include at least one selected from the group consisting of magnesium-aluminum hydrotalcite, magnesium-iron hydrotalcite, magnesium-chromium hydrotalcite, magnesium-gallium hydrotalcite, calcium-aluminum hydrotalcite, nickel-aluminum hydrotalcite, cobalt-aluminum hydrotalcite, and zinc-aluminum hydrotalcite.

[0053] According to one embodiment of the present invention, the heat stabilizer may be included in the composition in an amount of 1 to 10 parts by weight. Specifically, when the heat stabilizer is applied as an acetylacetonate-based compound alone, it may be included in an amount of 1 to 7 parts by weight, 2 to 7 parts by weight, or 3 to 7 parts by weight. In addition, when the heat stabilizer is applied as a hydrotalcite-based compound alone, or as a combination of an acetylacetonate-based compound and a hydrotalcite-based compound, it may be included in an amount of 3 to 10 parts by weight, 4 to 10 parts by weight, 5 to 10 parts by weight, or 6 to 10 parts by weight. When the heat stabilizer is applied as a combination of an acetylacetonate-based compound and a hydrotalcite-based compound, the weight ratio of the acetylacetonate-based compound to the hydrotalcite-based compound may be 1:1.5 to 1.5:1, or about 1:1. When the content of the above-mentioned heat stabilizer is within the above range, the shape stability of the member due to thermal expansion is secured, thereby minimizing detachment due to thermal expansion and minimizing the generation of thermal decomposition products.

[0054] additives

[0055] The above composition may further include an additive comprising at least one of a dispersant and a lubricant. Depending on the purpose, the additive may be a material and / or product known in the art to improve the processability of the composition, control viscosity, etc.

[0056] According to one embodiment of the present invention, the dispersant may comprise at least one selected from the group consisting of ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, and ethylene dimethacrylate, but is not limited thereto. The lubricant may comprise at least one selected from the group consisting of polyethylene wax, polypropylene wax, fatty acid ester, fatty acid amide, calcium stearate, magnesium stearate, zinc stearate, ethylene bis stearamide, methacrylate butadiene styrene, acrylic impact modifier, and polydimethylsiloxane, but is not limited thereto. Other additional additives may be selectively applied according to the purpose, provided that they do not impair the purpose of the composition according to the present invention.

[0057] According to one embodiment of the present invention, the additive may be included in the composition in a content range of 0.1 to 5 parts by weight, 0.1 to 3 parts by weight, 0.1 to 2 parts by weight, or 0.1 to 1 part by weight, and the additive may be applied to the composition according to the purpose within the content range.

[0058] According to one embodiment of the present invention, the composition may be a mixture produced by stirring or may be in the form of pellets. Specifically, the composition may be in the form of a mixture prepared by stirring the aforementioned components within a temperature range of 50 to 135°C. Even in the form of a mixture, the composition may form a sheet-like member using a biscuit extrusion sheet machine or the like. Additionally, the composition may be prepared as a pellet by stirring within a temperature range of 50 to 135°C and then extruding it. A composition formed into pellets in this manner has the advantage of being easy to mold into various members, and specifically, may have physical properties suitable for extrusion molding or injection molding.

[0059] Another embodiment of the present invention provides a flexible, non-flammable thermal expansion member manufactured using the composition. The member may be manufactured by extrusion molding or injection molding the composition. That is, the member may contain the composition. Specifically, the member may be processed into a shape suitable for a sheet, tape, sleeve, drain cap, or fire cap.

[0060] According to one embodiment of the present invention, the member may not crack or break when a bending test is performed in which a 2 mm thick sheet sample is wrapped around a 65A diameter steel pipe.

[0061] According to one embodiment of the present invention, the total heat release (THR) over 20 minutes according to the evaluation method of ISO 5660-1 may be 7 MJ / m² or less. Specifically, the total heat release (THR) over 20 minutes according to the evaluation method of ISO 5660-1 may be 6 MJ / m² or less, 5 MJ / m² or less, or 4 MJ / m² or less.

[0062] According to one embodiment of the present invention, the Limited Oxygen Index (LOI) according to the evaluation method of KS M ISO 4589-2 may be 50% or more. Specifically, the Limited Oxygen Index (LOI) according to the evaluation method of KS M ISO 4589-2 may be 50% or more, 65% or more, 72% or more, 80% or more, or 90% or more.

[0063] According to one embodiment of the present invention, it can satisfy the V-0 rating according to the UL 94 V evaluation and the 5VA rating according to the UL 94 5V evaluation.

[0064] The aforementioned performance evaluation may be performed using a sample formed by molding the above-mentioned member into a shape suitable for performance evaluation. As described above, the member comprising the above-mentioned composition may possess excellent flexibility and non-flammability properties, which can be specifically confirmed through the following examples.

[0065] Hereinafter, the present invention will be described in detail with reference to examples to specifically explain the invention. However, the embodiments according to the present invention may be modified in various different forms, and the scope of the present invention is not to be interpreted as being limited to the embodiments described below. The embodiments of this specification are provided to more completely explain the present invention to those with average knowledge in the art.

[0066] [Example 1]

[0067] A mixture comprising approximately 36 wt% PVC, approximately 37.5 wt% expanded graphite, approximately 19 wt% phosphorus-based flame retardant plasticizer, approximately 7 wt% acetylacetonate-based compound, approximately 0.3 wt% dispersant, and approximately 0.2 wt% lubricant was prepared and stirred for approximately 30 minutes at a temperature of approximately 90 °C. The stirred mixture was processed into pellets by thermal extrusion at a temperature of approximately 90 °C. The pellets thus prepared were extruded at a temperature of approximately 160 °C to produce a sheet-like member.

[0068] Figure 1 shows the pellets prepared in Example 1 and the sheet-like member using them.

[0069] [Example 2]

[0070] Pellet and sheet-like members were prepared in the same manner as in Example 1, except that about 37 wt% of PVC, about 36.5 wt% of expanded graphite, about 18 wt% of phosphorus-based flame retardant plasticizer, about 8 wt% of hydrotalcite-based compound, about 0.3 wt% of dispersant, and about 0.2 wt% of lubricant were applied.

[0071] [Example 3]

[0072] Pellet and sheet-like members were prepared in the same manner as in Example 1, except that about 35.5 wt% of PVC, about 36 wt% of expanded graphite, about 20 wt% of phosphorus-based flame retardant plasticizer, about 4 wt% of acetylacetonate-based compound, about 4 wt% of hydrotalcite-based compound, about 0.3 wt% of dispersant, and about 0.2 wt% of lubricant were applied.

[0073] [Comparative Example 1]

[0074] Pellet and sheet-like members were manufactured in the same manner as in Example 1, except that 5 parts by weight of calcium carbonate were additionally applied to 100 parts by weight of the mixture of Example 1. However, due to the addition of calcium carbonate, a problem occurred in which surface bursting occurred during the extrusion process for manufacturing the sheet-like member, and also, during thermal expansion according to the ignition test, a fibrous thermal expansion material was not formed as in the example, and fine powder was generated, resulting in a large amount of dust.

[0075] [Comparative Example 2]

[0076] Pellet and sheet-shaped members were manufactured in the same manner as in Example 1, except that 15 parts by weight of chopped glass fiber (chopped GF) were additionally applied to 100 parts by weight of the mixture of Example 1. However, due to the addition of chopped glass fiber, a problem occurred in which the glass fibers pulverized and fine powder was generated during thermal expansion according to the ignition test, and a rigid sheet with almost no flexibility was manufactured.

[0077] [Experimental Example 1] - Bending Test

[0078] After wrapping the 2 mm thick sheet-like members prepared according to Examples 1 to 3 and Comparative Examples 1 to 2 around a 65 A diameter steel pipe, a test was conducted to see if cracking or breakage occurred, and the results are shown in Table 1 below. In addition, Figure 2 shows an image of performing a venting test according to Experimental Example 1.

[0079] 65A Steel Pipe Bending Test Results: Occurrence of Surface Cracks Example 1X Example 2X Example 3X Comparative Example 10 (Surface crack occurred) Comparative Example 20 (Surface crack occurred)

[0080] Furthermore, to further confirm the flexibility of the member according to the present invention, a thicker sheet-like member with a thickness of 11 mm was manufactured using the method of Example 3, and as a result of a test in which it was bent as much as possible by hand as shown in Fig. 3, it was confirmed that no phenomenon such as surface cracking occurred and it could be bent easily.

[0081] [Experimental Example 2] - Total calorific value test (cone calorimeter test)

[0082] After manufacturing the sheet-like members according to Examples 1 to 3 into specimens suitable for the evaluation method of ISO 5660-1, the total heat output was measured according to the evaluation method of ISO 5660-1. When measuring the total heat output, three specimens were prepared and evaluated, and the non-combustibility was determined based on the average value thereof, and the results are shown in Table 2 below. For reference, in Korea, only a semi-non-combustibility grade exists where the total heat output over 10 minutes is 8 MJ / ㎡ or less, and in Japan, a non-combustibility grade is determined when the total heat output over 20 minutes is 8 MJ / ㎡ or less; therefore, the non-combustibility was determined based on these standards.

[0083] Total heat output (MJ / ㎡) over 20 min Remarks Measured Value Average Example 1 5.2 / 5.5 / 5.1 5.27 Non-combustible Grade Example 2 6.2 / 3.9 / 1.9 4 Non-combustible Grade Example 3 3.7 / 3.8 / 3.7 3.7 3 Non-combustible Grade

[0084] According to the results of Table 2 above, the total heat output test results for the member according to the example over 20 minutes showed a total heat output significantly lower than the non-combustible standard (Japan) of 8 MJ / ㎡, confirming that it has very high flame retardant performance corresponding to the non-combustible grade rather than the semi-non-combustible grade.

[0085] Additionally, to verify the shape stability of the members according to Examples 1 to 3 and Comparative Examples 1 to 2 after thermal expansion, the evaluation method of ISO 5660-1 was performed for 10 minutes, and the results are shown in FIGS. 4 and 5. Referring to FIG. 4, it was confirmed that the members according to Examples 1 to 3 maintained airtightness without the formation of cracks or holes after thermal expansion. In contrast, the members according to Comparative Examples 1 and 2, which contain calcium carbonate or glass fiber, formed cracks and / or holes after thermal expansion, so it was anticipated that smoke or oxygen blockage would not be effectively achieved in the event of a fire.

[0086] [Experimental Example 3] - Combustion Test

[0087] To confirm the flame retardancy of the sheet-like members according to Examples 1 to 3, a Limited Oxygen Index (LOI) evaluation, which measures the minimum oxygen concentration required for the material to maintain combustion, was performed according to the evaluation method of KS M ISO 4589-2. For reference, in Korea, the LOI performance standard for the semi-noncombustible grade is 28%, and if it exceeds 28%, it is classified as noncombustible grade. As a result of the experiment, it was confirmed that the sheet-like members according to Examples 1 to 3 all exhibited an LOI of 50% or higher, demonstrating very high flame retardant performance.

[0088] In addition, to confirm the resistance to fire of the sheet-like members according to Examples 1 to 3 and Comparative Examples 1 to 2, UL 94 V and UL 94 5V evaluations were performed to measure the combustion pattern in a vertical specimen, and the results were as shown in Table 3.

[0089] UL 94 V Rating UL 94 5V Rating Example 1V-05VA Example 2V-05VA Example 3V-05VA Comparative Example 1V-2 (Falling Object) - Comparative Example 2V-2 (Falling Object) -

[0090] As a result of the experiment, the members according to Examples 1 to 3 all exhibited combustion within 10 seconds without falling material after the flame was removed, and were judged to be of the VO grade. In addition, even when exposed to a strong flame five times repeatedly, no holes were formed, and they were judged to be of the 5VA grade. In contrast, the members according to Comparative Examples 1 and 2, which contain calcium carbonate or glass fiber, exhibited falling material during the vertical combustion test, and it is expected that effective sealing will not be secured in the event of a fire.

Claims

A polymer matrix comprising 1.20 to 50 parts by weight of polyvinyl chloride (PVC); 5 to 40 parts by weight of a phosphorus-based flame retardant plasticizer; 10 to 50 parts by weight of a thermal expansion agent; and A heat stabilizer comprising 1 to 10 parts by weight of at least one of an acetylacetonate-based compound and a hydrotalcite-based compound; Composition for a flexible, non-flammable, thermally expanding member.

2. In Claim 1, A composition for a flexible, non-flammable, thermally expanding member, wherein the above-mentioned phosphorus-based flame-retardant plasticizer comprises at least one selected from the group consisting of triphenyl phosphate, tricrezil phosphate, butylphenyl phosphate, isopropylated triphenyl phosphate, phenyl diisodecyl phosphate, phenyl diisodecyl phosphate, diphenyl isodecyl phosphate, and trinonylphenyl phosphate.

3. In Claim 1, A flexible, non-flammable, thermally expanding composition that does not contain halogen-based flame-retardant plasticizers and antimony-based flame-retardant plasticizers.

4. In Claim 1, A flexible, non-flammable thermal expansion composition for a thermal expansion member, wherein the thermal expansion agent comprises at least one selected from the group consisting of expandable graphite, borate, melamine, aluminum hydroxide, aluminum phosphate, phosphate ester, and polysiloxane.

5. In Claim 1, A composition for a flexible, non-flammable, thermally expanding member, wherein the above acetylacetonate-based compound is represented by the following chemical formula 1: [Chemical Formula 1] Macaque) n In the above chemical formula 1, M is a metallic element selected from the group consisting of Fe, Co, Ni, Cu, Mn, V, Cr, La, Ce, Eu, Gd, Y, Ti, Zr, Hf, Al, Sn, Li, Na, K, Ca and Ba, and n is an integer from 1 to 4.

6. In Claim 1, A composition for a flexible, non-flammable, thermally expanding member, wherein the hydrotalcite-based compound comprises at least one selected from the group consisting of magnesium-aluminum hydrotalcite, magnesium-iron hydrotalcite, magnesium-chromium hydrotalcite, magnesium-gallium hydrotalcite, calcium-aluminum hydrotalcite, nickel-aluminum hydrotalcite, cobalt-aluminum hydrotalcite, and zinc-aluminum hydrotalcite.

7. In Claim 1, A composition for a flexible, non-flammable thermal expansion member, wherein the heat stabilizer is an acetylacetonate-based compound, a hydrotalcite-based compound, or a mixture of an acetylacetonate-based compound and a hydrotalcite-based compound.

8. In Claim 1, A flexible, non-flammable thermal expansion member composition further comprising 0.1 to 5 parts by weight of an additive comprising at least one of a dispersant and a lubricant.

9. In Claim 1, The above composition is a flexible, non-flammable, thermally expanding composition in the form of pellets.

10. A flexible, non-flammable thermal expansion member manufactured using the composition according to Claim 1.

11. In Claim 10, A flexible, non-flammable thermal expansion member that does not crack or break during a bending test in which a 2 mm thick sheet sample is wrapped around a 65A diameter steel pipe.

12. In Claim 10, A flexible, non-combustible thermal expansion member having a Total Heat Release (THR) of 7 MJ / ㎡ or less over 20 minutes according to the evaluation method of ISO 5660-1.

13. In Claim 10, A flexible, non-flammable thermal expansion member having a Limited Oxygen Index (LOI) of 50% or more according to the evaluation method of KS M ISO 4589-2.

14. In Claim 10, A flexible, non-flammable thermal expansion member that satisfies a V-0 rating according to UL 94 V evaluation and a 5VA rating according to UL 94 5V evaluation.

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