KR20080072419A - Flame retardant resin composition and electrical wire manufactured using the same - Google Patents

Abstract

A flame retardant resin composition, and an electric wire coated with a flame retardant sheath material comprising the composition are provided to improve thermal stability, heat resistance, chemical resistance and low fuming property and to reduce the generation of acidic gas and toxic gas during combustion. A flame retardant resin composition comprises 100 parts by weight of a base resin which comprises an ethylene-methyl acrylate copolymer resin containing 9-36 wt% of methyl acrylate; 30-150 parts by weight of a metal hydroxide as a flame retardant; and 1-15 parts by weight of a peroxide as a crosslinking agent. Preferably the composition comprises further 1-30 parts by weight of any one flame retardant aid selected from the group consisting of red phosphorus, a silicon-based compound, a boron compound, a carbon powder and their mixture.

Description

Flame retardant resin composition and electrical wire manufactured using the same

The following drawings attached to this specification are illustrative of preferred embodiments of the present invention, and together with the detailed description of the invention to serve to further understand the technical spirit of the present invention, the present invention is a matter described in such drawings It should not be construed as limited to.

1 is a cross-sectional view showing the structure of an electric wire manufactured using the composition of Examples 1 to 6 and Comparative Examples 1 to 3.

<Description of main parts of drawing>

11 Inner conductor 13 Insulation layer 15 Bedding layer

17 ... braided layer 19 ... sheath

The present invention relates to a flame retardant resin composition and an electric wire manufactured by using the same, and more particularly, to a flame retardant resin composition having excellent flame retardancy as well as excellent mechanical properties and heat resistance, and an electric wire manufactured using the same.

Conventionally, inexpensive ethylene vinyl acetate copolymer resins are widely used as base resins or matrix resins for flame retardant sheaths as a sheath material for ship electric wires or electric power, control and signal wires for general buildings and special applications. come.

On the other hand, the flame-retardant sheath is extrusion-coated to the outermost outer sheath of the electric wire and crosslinked in a steam atmosphere of 200 ℃ or more, such that when exposed to high temperature for a long time, the polymer resin by the existing technology is thermally decomposed partly change physical properties, It becomes more difficult to satisfy the mechanical properties and heat resistance required in the cable. Therefore, in order to improve the heat resistance characteristics of flame retardant sheaths and to maintain thermal stability at high temperatures, development of flame retardant sheaths applied with special antioxidants is required. Review is required.

In addition, when a high flame retardant sheath body is required for a wire having a high flame retardant grade, when the ethylene vinyl acetate copolymer resin is used as a base resin, a large amount of inorganic flame retardants and organic flame retardants may be charged to improve flame retardancy. However, the addition of excess inorganic and organic flame retardants increases the specific gravity of the sheath, which has the disadvantage that the total weight of the cable exceeds the specifications and requirements applied to a particular ship. In addition, in the case of a special cable applied to the vessel has a large demand for and demand for a cable having a small outer diameter and light weight, there are a number of problems when applying a flame retardant system according to the existing technology. In recent years, regulations on the smoke generated during combustion have been tightened, and thus the demand for low-smoke lines is also increasing.

However, since ethylene vinyl acetate copolymer resin is not thermally resistant at high temperatures due to the low thermal stability of the copolymer resin due to the decomposition of vinyl acetate bound to ethylene at a low temperature, high heat is transferred from the outside or the like When exposed to the atmosphere it is difficult to secure the flame retardancy and heat resistance of the sheath body by the rapid thermal decomposition of the polymer resin. In addition, the conventional ethylene copolymer was not able to satisfy the heat resistance at 300 ℃ as it is micro-decomposed at 300 ℃, there is a problem that thermal deformation occurs badly and carbonized when exposed to high temperature for a long time.

Therefore, efforts to develop a flame retardant resin composition not only excellent in flame retardancy and mechanical strength but also excellent in heat resistance have been steadily made in the related field, and the present invention has been devised under such technical background.

The technical problem to be achieved based on the above-mentioned conventional problems is to improve the thermal stability and heat resistance of the sheath body so that it is not easily pyrolyzed when exposed to a high temperature atmosphere in which high heat is transmitted from the outside. It is an object of the present invention to provide a flame-retardant resin composition and an electric wire produced using the same that can achieve the problem.

The flame retardant resin composition provided in the present invention for achieving the technical problem to be achieved by the present invention is 100 parts by weight of a base resin comprising an ethylene methyl acrylate copolymer resin of 9 to 36% by weight of methyl acrylate; As a flame retardant, 30-150 weight part of metal hydroxides; And 1 to 15 parts by weight of peroxide as a crosslinking agent.

The base resin is any one selected from the group consisting of ethylene methyl acrylate terpolymer resin having maleic anhydride introduced, ethylene acryster ester terpolymer resin having maleic anhydride introduced and ethylene acrylic ester glycidyl methacrylate terpolymer resin. It may further comprise a resin, in this case the content of the ethylene methyl acrylate copolymer resin in the base resin is preferably 80 to 98% by weight. The specific gravity of the methyl acrylate is preferably 0.93 to 0.96 g / cm ³ , and the melt index of the ethylene methyl acrylate terpolymer resin is preferably 0.1 to 10 g / 10 min. The metal hydroxide may be aluminum hydroxide, magnesium hydroxide, calcium hydroxide, basic magnesium carbonate, hydrotalcite, hornite or magnesite hydroxide, and the peroxide may be di- (2,4-dichlorobenzoyl) -peroxide [Di- (2 , 4-dichlorobenzoyl) -peroxide], Dibenzoyl peroxide, tert-Butyl peroxybenzoate, 1,1-di- (tertiary-butylperoxy)- 3,3,5-trimethylcyclohexane [1,1-di- (tert-butylperoxy) -3,3,5-Trimethylcyclohexane], Dicumyl peroxide, Tertary-butyl cumyl peroxide [tert- Butylcumylperoxide], Di- (2-tert-buty-peroxyisopropyl) -benzene, 2,5-dimethyl-2,5-di- (ter Sheryl-butylperoxy) -hexanoic acid [2,5-Dimethyl-2,5-di- (tert-butylperoxy) -hexane], di-tert-butylperoxide or 2,5 -Dimethyl-2,5-di (tertiary-butylperoxy) ) -3 heksim a [2,5-dimethyl-2,5- di (tert-butylperoxy) hexyme-3] can be preferably used. The flame retardant resin composition may further include an auxiliary flame retardant, an antioxidant, a crosslinking aid, a lubricant or a processing aid.

The present invention provides an electric wire manufactured by using the flame retardant resin composition together with the flame retardant resin composition.

Hereinafter, specific examples will be described in more detail to help the understanding of the present invention. However, embodiments according to the present invention can be modified in many different forms, and the scope of the present invention should not be construed as being limited to the embodiments described below. Embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art.

The present invention is a flame-retardant resin composition used in the production of the sheath body of the electric wire, comprising a basic resin, a flame retardant and a crosslinking agent.

The base resin comprises an ethylene methyl acrylate copolymer resin. Ethylene methyl acrylate copolymer resin is significantly reduced in the degree of thermal decomposition at high temperature of 300 ℃ or more, it is very excellent in thermal stability, flame retardancy, low smoke properties at high temperature. The content of methyl acrylate contained in the ethylene methyl acrylate copolymer resin is preferably 9 to 36% by weight. Regarding the numerical limitation of the methyl acrylate content, if the lower limit of the numerical range is less than the lower limit of the numerical range, the crosslinking reaction by the peroxide during the compound process or the extrusion process proceeds due to the high melting temperature, the overall extrusion workability is significantly reduced Due to the low content of polar groups, oil resistance is lowered. In particular, due to the low content of methyl acrylate, the ability of the base resin containing inorganic additives and organic additives is difficult to secure flame retardancy such as oxygen index, and when a large amount of flame retardant is added, mechanical properties such as elongation are very low. On the other hand, the ethylene methyl acrylate copolymer exceeding the said upper limit is not commercialized. The specific gravity of the methyl acrylate is preferably 0.93 to 0.96 g / cm ³ , and the melt index of the ethylene methyl acrylate terpolymer resin is preferably 0.1 to 10 g / 10 min. Regarding the numerical limitation on the melt index of the ethylene methyl acrylate terpolymer resin, when it falls below the lower limit, the elongation rate and the extrusion processability are lowered, and when the upper limit is exceeded, the tensile strength, heat resistance and oil resistance are lowered.

The base resin further includes a modified ethylene copolymer resin or a modified ethylene terpolymer resin such as a modified polyethylene terpolymer containing an ethyl acrylate, butyl acrylate or 2-ethylhexyl acrylate monomer in addition to the ethylene methyl acrylate copolymer resin. can do. Most preferably ethylene methyl acrylate terpolymer resin with maleic anhydride introduced, ethylene acrylic ester terpolymer resin with maleic anhydride introduced or ethylene acrylic ester glycidyl methacrylate terpolymer resin can be used. Thus, when the modified ethylene copolymer resin or modified ethylene terpolymer resin is further included in the base resin, the content of the ethylene methyl acrylate copolymer resin in the base resin is preferably 80 to 98% by weight. Regarding the numerical limitation on the content of ethylene methyl acrylate copolymer resin in the base resin, if it falls below the lower limit, the effect on the bonding strength between the ethylene methyl acrylate resin and the inorganic additive is not so great that the tensile strength and heat resistance characteristics It cannot be expected to improve, and when the upper limit is exceeded, the elongation rate is drastically lowered as the content of the polar group is increased, and the extrusion processing characteristics are significantly lowered as the viscosity is increased.

As the flame retardant, a metal hydroxide is used, and as the metal hydroxide, aluminum hydroxide, magnesium hydroxide, calcium hydroxide, basic magnesium carbonate, hydrotalcite, hornite or magnesite hydroxide may be used, and vinylsilane, stearic acid and oleic acid may be used. It is most preferable to use magnesium hydroxide or magnesium hydroxide having a pyrolysis temperature of 200 ° C. or more as the metal hydroxide surface-treated with at least one selected from among amino, polysiloxanes, and polymer resins. In the flame retardant resin composition of the present invention, the content of the flame retardant is preferably 30 to 160 parts by weight based on 100 parts by weight of the basic resin. Regarding the numerical limitation on the content of the flame retardant, if the lower limit is not reached, the purpose of securing flame retardancy cannot be achieved. If the upper limit is exceeded, the amount of flame retardant does not increase in proportion to the added amount, and an excessive amount exists. As a result, there is a disadvantage in that tensile strength, elongation and extrusion workability are lowered.

As the crosslinking agent, a peroxide is used, and as the peroxide, di- (2,4-dichlorobenzoyl) -peroxide [Di- (2,4-dichlorobenzoyl) -peroxide] and dibenzoyl peroxide [Dibenzoyl peroxide] Tert-Butyl peroxybenzoate, 1,1-di- (tertiary-butylperoxy) -3,3,5-trimethylcyclohexane [1,1-di- ( tert-butylperoxy) -3,3,5-Trimethylcyclohexane, Dicumyl peroxide, Tert-Butylcumylperoxide, Di- (2-tertary-butyl-peroxyisopropyl) ) -Benzene [di- (2-tert-buty-peroxyisopropyl) -benzene], 2,5-dimethyl-2,5-di- (tertiary-butylperoxy) -hexane [2,5-Dimethyl-2, 5-di- (tert-butylperoxy) -hexane], di-tert-butylperoxide or 2,5-dimethyl-2,5-di (tert-butylperoxy) -hexane 3 [2,5-dimethyl-2,5-di (tert-butylperoxy) hexyme-3] may be used. The content of the crosslinking agent in the flame retardant resin composition of the present invention is preferably 1 to 15 parts by weight based on 100 parts by weight of the base resin. In relation to the numerical limitation on the content of the flame retardant, if the lower limit is not reached, sufficient crosslinking is not achieved, thereby making it difficult to secure the desired physical properties. When the upper limit is exceeded, the degree of crosslinking reaction is high within a short time during the compounding process or extrusion processing. Problems may occur in processability, such as the initial cross-linking by the temperature rise during the process, the by-products of the cross-linking reaction may be excessively deteriorated rather than physical properties.

Supplementary flame retardants may be used together with the flame retardants. Secondary flame retardants can reduce the amount of flame retardant and can increase the flame retardant effect. As the auxiliary flame retardant, red phosphorus, silicon-based compound, boron compound, carbon powder or mixtures thereof may be preferably used. The auxiliary flame retardant is preferably 1 to 30 parts by weight based on 100 parts by weight of the base resin. In relation to the numerical limitation on the amount of auxiliary flame retardant, if the lower limit is not reached, an increase in the flame retardant effect cannot be expected, and when the upper limit is exceeded, the application content of the main flame retardant decreases in consideration of mechanical properties and the like. Flame retardancy is reduced or heat resistance is lowered.

In addition to the basic resin, the flame retardant and the crosslinking agent, an antioxidant, a crosslinking aid, a lubricant and a processing aid may be added to the flame retardant resin composition of the present invention. As the antioxidant, hindered phenol-based, phosphate-based, imidazole-based, and sulfur-based antioxidants may be used. Preferably, the hindered phenol-based and sulfur-based antioxidants are mixed or imidazole-based antioxidants are mixed. The content of the antioxidant is preferably 0.2 to 8 parts by weight with respect to 100 parts by weight of the base resin, if the lower than the lower limit in relation to the numerical limitation on the content of the antioxidant, the effect on the heat resistance can not be expected as well as the compound process And there is a problem that can not ensure the resistance to oxidation generated during extrusion, if the above upper limit there is a problem that the flame retardancy is lowered as an excess amount of the organic material having no flame retardant effect is added.

As the crosslinking aid, cyanurate or methacrylate-based crosslinking aid may be used, and trializocyanurate or trimethyllopropane methacrylate may be preferably used. The content of the crosslinking aid in the flame retardant resin composition of the present invention is preferably 1 to 10 parts by weight based on 100 parts by weight of the base resin. If the lower limit is exceeded in relation to the numerical limitation on the amount of the crosslinking aid, the tensile strength, heat resistance and oil resistance cannot be improved. If the upper limit is exceeded, the elongation rate is significantly decreased due to the increase in the crosslinking density. Can not do it.

As the lubricant, substances such as high molecular weight wax, low molecular weight wax, polyolefin wax, paraffin wax, paraffin oil, stearic acid, metal soap, organic silicone, fatty acid ester, fatty acid amide, fatty alcohol, fatty acid, etc. may be used. It is preferable that it is 0.5 to 8 parts by weight with respect to 100 parts by weight of the basic resin, but if it falls below the lower limit in relation to the numerical limitation on the content of the lubricant, it is impossible to ensure uniform dispersibility of the flame retardant during compounding. And elongation rate), and in particular, there is a problem such as a marked deterioration in properties after heating, and when the upper limit is exceeded, the viscosity is significantly decreased during compounding due to excessive addition of low viscosity lubricant. Kneading may occur and flame retardant due to the addition of low molecular weight lubricant There is a problem that the tensile strength is significantly reduced.

As the processing aid, stearic acid, paraffin wax, crystalline wax, low molecular weight polyethylene wax, metal salt, or the like can be used alone or in combination. The amount of the processing aid is preferably 0.5 to 6 parts by weight with respect to 100 parts by weight of the basic resin, and if it falls below the lower limit with respect to the numerical range of the content of the processing aid, the extrusion performance can be expected to increase due to the viscosity decrease during the extrusion process. In addition, there is a problem that the internal surface heat is increased and the flowability of the raw material is not desired due to the high friction on the metal surface, and if the upper limit is exceeded, the viscosity difference according to the temperature of the compound is severe and the extrudability may be reduced, and the excess organic matter Due to the problem that the heat resistance and flame retardancy is reduced.

Hereinafter, each composition, which is divided and set as shown in Table 1 below, is separately set in Examples (1 to 6) and Comparative Examples (1 to 3), respectively, for material specimens and wires prepared from the respective compositions. Various technical evaluations will be made to specifically describe the technical effects of the present invention.

Example (1-6) and Comparative example (1 ~ 3)

To the composition as shown in Table 1, the surface temperature was blended in an open roll having a temperature of 80 ℃ or more and molded for 20 minutes in a press of 170 ℃ temperature to prepare a specimen to measure the general characteristics. In addition, using the composition of the composition shown in Table 1, the electric wire of the structure as shown in Figure 1 composed of the inner conductor 11, the insulating layer 13, the bedding layer 15, the braided layer 17 and the sheath body 19 (21) was prepared. The insulating layer was subjected to pressure extrusion molding of an insulating material on which a crosslinking agent, an antioxidant, a processing aid and the like was added to a composite resin based on ethylene propylene rubber or ethylene propylene rubber. The extruded insulators were irradiated crosslinked using chemical crosslinking or electron beam by steam. The specimens and wires prepared as described above were subjected to tests of smoke density and flame retardancy for tensile strength and elongation, aging characteristics, oil resistance, and finished wires at room temperature as follows.

division Example Comparative example One 2 3 4 5 6 One 2 3 Resin 100 85 85 85 - - - - - Resin a ' - - - - 100 85 - - - Resin b - 15 - - - 15 - - - Resin - - 15 - - - - - - Resin - - - 15 - - - - - Resin - - - - - - 100 100 - Resin - - - - - - - - 100 Flame Retardant 130 130 130 130 130 130 130 - - Flame retardant b - - - - - - - 150 150 Lubricant 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 Antioxidant 2 2 2 2 2 2 2 2 2 Crosslinking agent 4 4 4 4 4 4 3 3 3

In Table 1, resin a is an ethylene methyl acrylate copolymer resin having a content of 20% by weight of methyl acrylate and a melt index of 8g / 10min, and resin b has a content of 35% by weight of methyl acrylate and a melt index of 5g. / 10min ethylene methyl acrylate copolymer resin, resin b is ethylene methyl acrylate terpolymer resin with maleic anhydride introduced, resin c is ethylene acrylic ester terpolymer resin with maleic anhydride introduced, resin d is ethylene aric Ester glycidyl methacrylate terpolymer resin, resin e is an ethylene vinyl acetate copolymer resin having a vinyl acetate content of 28% by weight, and resin e 'is an ethylene vinyl acetate copolymer resin having a vinyl acetate content of 46% by weight . The flame retardant a is magnesium hydroxide, the flame retardant b is aluminum hydroxide, the lubricant is stearic acid, and the antioxidant is Irganox 1010 (tetrakis [methylene (3,5-di-t-butyl-4-hydroxyl hydrocyanamate). Methane) and the crosslinker is dicumyl peroxide.

Property evaluation

The specimens and wires according to the Examples and Comparative Examples were evaluated as follows, and the results are shown in Table 2 below.

1) Room temperature characteristics

Tensile strength and elongation were measured according to IEC-60811-1-1. The required tensile strength is at least 0.92 kgf / mm ² and the required elongation is at least 120%.

2) Tensile and elongation after heating

After leaving the specimen at 100 ° C. for 168 hours, the residual ratio was measured when the rate of change in tensile strength microelongation was measured. The required value is 70% each.

3) oxygen index

Flame retardancy was measured according to ASTM D 2863. The oxygen index required should be at least 30%.

4) Flame retardant

Tested according to IEC 60332-3 Cat.A flame retardant test standard. The case where the combustion length was 2.4 mm or less was regarded as a pass that satisfies flame retardancy.

5) smoke density

The finished wire was tested in accordance with IEC 61034. The required value should be at least 60%.

6) smoke index

The cable sheath was evaluated according to the NES 711 standard.

7) Toxicity Index

The evaluation was made on the baby sheath body according to the NES 713 standard.

8) Hydrogen ion concentration (pH)

The cable sheath was evaluated according to IEC 754-2.

9) Electrical Conductivity

The cable sheath was evaluated according to IEC 754-2.

10) Thermal stability

The degree of pyrolysis at 230 ° C. for the cable sheath is calculated by weight.

division Example Comparative example One 2 3 4 5 6 One 2 3 Tensile strength (kgf / mm ² ) 0.98 1.12 1.23 1.15 1.01 1.25 0.78 0.84 0.67 Elongation (%) 250 223 198 205 278 227 321 278 362 After heating Tensile residual rate 89 92 91 95 88 94 64 67 71 Elongation 88 89 94 92 85 90 56 62 57 Oxygen index 33 34 33 32 33 32 32 27 29 Flame retardant pass pass pass pass pass pass fail fail fail Smoke density 90 92 89 80 91 88 75 71 68 Acting index 11 13 14 13 12 14 18 22 23 Toxicity Index 1.2 1.4 1.4 1.4 1.35 1.5 3.1 3.4 3.7 Thermal stability 0.7 0.6 0.6 0.6 0.8 0.7 4.5 11 13 Hydrogen ion concentration 6.6 6.2 6.1 6.5 6.4 6.1 4.7 4.5 4.3 Electrical Conductivity (μs / mm) 0.52 0.50 0.51 0.52 0.51 0.50 1.12 1.34 1.45

In Example 1 in which ethylene methyl acrylate copolymer resin was applied alone, thermal stability at 300 ° C. was also satisfied while maintaining mechanical strength. In addition, the electrical conductivity was lower and the pH was higher than that of the flame retardant material to which the conventional ethylene vinyl acetate copolymer was applied. Existing flame-retardant materials have a disadvantage that the gas is strongly corrosive, such as strong acidity and low electrical conductivity when the gas is low pH value can cause severe corrosion of the equipment and equipment by combustion. However, by using the flame-retardant resin composition of the present invention with less emission of acidic gas during combustion as a flame retardant coating material of the wire it was possible to solve the disadvantages of the existing technology during combustion.

In Examples 2 to 4, ethylene methyl acrylate terpolymer resin in which maleic anhydride was introduced to maintain mechanical properties in ethylene methyl acrylate copolymer resin, increase compatibility with flame retardants, and improve properties after heating, anhydrous Ethylene acrylic ester terpolymer resin or ethylene acrylic ester glycidyl methacrylate terpolymer resin with maleic acid introduced was used. As a result, the mechanical properties were increased, showing very good post-heating properties. In addition, compared with the material applied to the present invention, the toxicity index, the smoke index, and the smoke density characteristics of the gas and fine carbon due to the combustion of the flame retardant material were very excellent.

In Examples 5 to 6, the methyl acrylate content of the ethylene methyl acrylate copolymer resin was increased, and in Example 6, the ethylene methyl acrylate terpolymer resin which was maleic anhydride was applied to improve flame retardancy and mechanical strength. . Examples 5 to 6 were also excellent in smoke index, toxicity index, pH and electrical conductivity characteristics by the combustion gas.

In Comparative Example 1, ethylene vinyl acetate copolymer resin was used as a base resin, and magnesium hydroxide was added thereto as a flame retardant. The elongation was very high, but the tensile strength was very low. In addition, the physical properties after heating did not satisfy the requirements. In addition, by using the ethylene vinyl acetate copolymer resin to release the acidic gas during combustion, pH and electrical conductivity characteristics, toxicity index, smoke index was higher than the embodiments. In the case of a wire manufactured using the composition of Comparative Example 1, the phenomenon of melting during combustion was found despite the high oxygen index of the flame retardant material, and did not satisfy the required level of flame retardancy. In the case of ethylene vinyl acetate copolymer resin, vinyl acetate slowly decomposed at 200 ° C. or higher and rapidly decomposed at 300 ° C. or higher, and thus, thermal stability at high temperature could not be obtained.

In the case of 2 to 3 in comparison, ethylene vinyl acetate copolymer resin was used as the base resin, and aluminum hydroxide was added thereto as a flame retardant. Mechanical characteristics, thermal characteristics, flame retardancy, and various characteristics by the combustion gas are shown as in Comparative Example 1. In particular, since the ethylene vinyl acetate copolymer resin and aluminum hydroxide rapidly thermally decomposes at 200 ° C or higher, the thermal stability at 300 ° C or higher is very weak. As a result, the electric wire produced using the composition of Comparative Examples 2 to 3 had a low flash point during combustion and completely burned out within a short time.

Optimal embodiments of the present invention described above have been disclosed. Although specific terms have been used herein, they are used only for the purpose of describing the present invention in detail to those skilled in the art and are not intended to limit the scope of the present invention as defined in the claims or the claims.

Flame retardant resin composition according to the present invention is excellent in thermal stability and heat resistance can be effectively used in an environment exposed to a long time at 200 ℃ or more, especially at a high temperature of 300 ℃ or more, not only excellent in chemical resistance, flame retardancy and low smoke resistance, Significantly less acid and toxic gases are generated during combustion and can be used for various purposes.

Claims (11)

100 parts by weight of a base resin comprising an ethylene methyl acrylate copolymer resin having a content of methyl acrylate of 9 to 36% by weight; As a flame retardant, 30-150 weight part of metal hydroxides; And A flame retardant resin composition comprising 1 to 15 parts by weight of peroxide as a crosslinking agent. The method of claim 1, The base resin is any one selected from the group consisting of ethylene methyl acrylate terpolymer resin having maleic anhydride introduced, ethylene acryster ester terpolymer resin having maleic anhydride introduced and ethylene acrylic ester glycidyl methacrylate terpolymer resin. It further comprises a resin, the flame retardant resin composition, characterized in that the content of ethylene methyl acrylate copolymer resin in the base resin is 80 to 98% by weight. The method of claim 1, The flame retardant resin composition, characterized in that the melt index of the flame retardant resin composition is 0.1 ~ 10g / 10min. The method of claim 1, The metal hydroxide is any one selected from the group consisting of aluminum hydroxide, magnesium hydroxide, calcium hydroxide, basic magnesium carbonate, hydrotalcite, honite and magnesite hydroxide. The method of claim 1, The peroxide is di- (2,4-dichlorobenzoyl) -peroxide [Di- (2,4-dichlorobenzoyl) -peroxide], dibenzoyl peroxide [Dibenzoyl peroxide], tert-butyl-peroxybenzoate [tert -Butyl peroxybenzoate], 1,1-di- (tert-butylperoxy) -3,3,5-trimethylcyclohexane [1,1-di- (tert-butylperoxy) -3,3,5-Trimethylcyclohexane] Dicumyl peroxide, tert-Butylcumylperoxide, di- (2-tert-butyl-peroxyisopropyl) -benzene-di- (2-tert-buty- peroxyisopropyl) -benzene], 2,5-dimethyl-2,5-di- (tert-butylperoxy) -hexane [2,5-Dimethyl-2,5-di- (tert-butylperoxy) -hexane], Di-tert-butylperoxide and 2,5-dimethyl-2,5-di (tertiary-butylperoxide) hex-3 [2,5-dimethyl-2,5-di (tert-butylperoxy) hexyme-3] flame retardant resin bath, characterized in that any one or two or more selected from the group consisting of Water. The method of claim 1, The flame retardant resin composition further comprises 1 to 30 parts by weight of any one auxiliary flame retardant selected from the group consisting of red phosphorus, silicon compound, boron compound, carbon powder and mixtures thereof. The method of claim 1, The flame retardant resin composition further comprises 0.2 to 8 parts by weight of any one antioxidant selected from the group consisting of hindered phenolic, phosphate, imidazole and sulfur-based antioxidants. The method of claim 1, The flame retardant resin composition further comprises 1 to 10 parts by weight of cyanurate or methacrylate-based crosslinking aid. The method of claim 1, The flame retardant resin composition further comprises 0.5 to 8 parts by weight of lubricant. The method of claim 1, A flame retardant resin composition further comprising a processing aid comprising one single substance or a mixture of two or more selected from the group consisting of stearic acid, paraffin wax, crystalline wax, low molecular weight polyethylene wax and metal salt. An electric wire coated with a flame-retardant sheath produced using the flame-retardant resin composition according to any one of claims 1 to 10.

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