KR20110076494A - Thermoplastic elastomer composition and molded product usign the same - Google Patents

Abstract

PURPOSE: A thermoplastic rubber compound is provided to ensure excellent ductility, surface hardness, and restitution at high and low temperatures and to enable use for the manufacture of various molded products such as electrical and electronic parts and automobile parts. CONSTITUTION: A thermoplastic rubber compound includes (A) a block copolymer including at least two aromatic vinyl compounds and one or more conjugated diene-based compounds, (B) paraffin oil, (C) polyolefin resins, (D) inorganic additives, (E) polyphenylene ether-based resins and (F) a polypropylene-silicone rubber master batch. The polypropylene-silicone rubber master batch is included in the amount of 0.01-5 weight%.

Description

Thermoplastic rubber composition and molded article using same {THERMOPLASTIC ELASTOMER COMPOSITION AND MOLDED PRODUCT USIGN THE SAME}

The present disclosure relates to a thermoplastic rubber composition and a molded article using the same.

Thermoplastic elastomer (TPE) has a rubbery elasticity like a vulcanized rubber at room temperature, and is a material of intermediate properties of rubber and plastic that are injection molded at the same temperature as plastic materials.

Due to these characteristics, thermoplastic rubber has been applied to various applications such as sporting goods, food packaging, medical devices, portable IT exteriors, and home appliances that require ductility. In addition, the injection molding is possible, not only to mold the product that the vulcanized rubber can not be molded, but also to shorten the production time of the product, recycling is possible to solve the environmental problem that is a problem in the vulcanized rubber.

However, the thermoplastic rubber is very poor in physical properties at high temperatures (physical properties and elongation reduction rate) in comparison with vulcanized rubber products within a surface hardness of 50A (Shore A), there is a big limitation in the application of the product.

In order to overcome these limitations, thermoplastic rubber is attempting to develop a product through an alloy with other resins, but it does not meet the desired thermal properties at high temperatures, and rather, there is a problem of losing surface softness, which is an existing advantage.

US Patent Publication No. 2005-0288393 discloses a thermoplastic rubber composition consisting of a thermoplastic resin, a block copolymer, a core-shell copolymer and an oil. However, the composition is not suitable for use in diaphragms used in electrical and electronic components, especially washing machines, with a surface hardness of 50 A (Shore A) of greater than 70.

U.S. Patent Application Publication No. 2004-0151933 discloses a thermoplastic rubber composition consisting of a thermoplastic resin, a rubber elastomer, a saturated elastomer and an oil. However, it is impossible to maintain a range within a surface hardness of 50 A (Shore A). .

One aspect of the present invention is to provide a thermoplastic rubber composition having excellent ductility, surface hardness, restoring force at room temperature and high temperature, as well as excellent heat resistance, chemical resistance, processability, wear resistance, and the like.

Another aspect of the present invention is to provide a molded article using the thermoplastic rubber composition.

One aspect of the invention (A) a block copolymer comprising at least two aromatic vinyl compounds and at least one conjugated diene compound; (B) paraffin oil; (C) polyolefin resin; (D) inorganic additives; (E) polyphenylene ether resin; And (F) the total amount of thermoplastic rubber composition comprising the polypropylene-silicone rubber masterbatch, wherein the polypropylene-silicone rubber masterbatch (F) is contained in an amount of 0.01 to 5% by weight.

The thermoplastic rubber composition is based on the total amount of the thermoplastic rubber composition 25 to 55% by weight of the block copolymer (A), 20 to 50% by weight of the paraffin oil (B), 5 to 15% by weight of the polyolefin resin (C), 5 to 20 wt% of the inorganic additive (D) and 3 to 15 wt% of the polyphenylene ether resin (E).

The block copolymer (A) may include 20 to 35 wt% of the aromatic vinyl compound and 65 to 80 wt% of the conjugated diene compound, and specifically, styrene-ethylene-butadiene-styrene (SEBS) block air. Copolymer, Styrene-ethylene-propylene-styrene (SEPS) block copolymer, styrene-isoprene-styrene (SIS) block copolymer, styrene-ethylene-isoprene-styrene (SEIS) block copolymer, styrene-ethylene-ethylene-propylene- Styrene (SEEPS) block copolymers or combinations thereof. In addition, the weight average molecular weight of the block copolymer (A) may be 140,000 to 180,000 g / mol.

The paraffin oil (B) may have a kinematic viscosity of 95 to 215 cSt at 40 ℃.

The polyolefin resin (C) may have a melt index (230 ° C., 2.16 kg) of 11 to 25 g / 10 min, and also polyethylene resin, polypropylene resin, polybutylene resin, ethylene-propylene copolymer resin, and ethylene-vinyl Alcohol copolymer resins or combinations thereof. In addition, the polyolefin (C) resin may be a homo polypropylene resin.

The particle size of the inorganic additive (D) may be 0.01 to 5 ㎛, and also calcium carbonate, talc, clay, silica, mica, titanium dioxide, carbon black, graphite, wollastonite, nanosilver or a combination thereof It may include.

The polyphenylene ether resin (E) may have a weight average molecular weight of 20,000 to 40,000 g / mol.

The polypropylene-silicon rubber masterbatch (F) may comprise homo polypropylene, and the polypropylene and the silicone rubber may be made in a weight ratio of 1: 0.5 to 1: 1.5.

The surface hardness of KS M 6518 of the thermoplastic rubber composition may be 50 A or less.

Another aspect of the present invention provides a molded article prepared from the thermoplastic rubber composition.

Other aspects of the present invention are included in the following detailed description.

In addition to excellent ductility, surface hardness, and restoring force at room temperature and high temperature, as well as providing a thermoplastic rubber composition having excellent heat resistance, chemical resistance, processability, and abrasion resistance, the manufacture of various molded articles such as electric and electronic parts and automobile parts It can be usefully used for, and particularly useful for diaphragm for a washing machine.

Hereinafter, embodiments of the present invention will be described in detail. However, this is presented as an example, by which the present invention is not limited and the present invention is defined only by the scope of the claims to be described later.

The thermoplastic rubber composition according to one embodiment comprises (A) a block copolymer comprising at least two aromatic vinyl compounds and at least one conjugated diene-based compound, (B) paraffin oil, (C) polyolefin resin, (D) inorganic additive , (E) polyphenylene ether resins and (F) polypropylene-silicone rubber masterbatches.

Hereinafter, each component included in the thermoplastic rubber composition according to one embodiment will be described in detail.

(A) block copolymer

The block copolymer is a copolymer including at least two aromatic vinyl compounds and at least one conjugated diene-based compound, and is used to obtain surface ductility of the thermoplastic rubber.

In the structure of the block copolymer, the aromatic vinyl compound may be a hard segment, and the conjugated diene compound may be a soft segment. The hard segment prevents deformation of the thermoplastic and the soft segment exhibits the properties of rubber. Depending on the type, content, molecular weight and arrangement of the hard and soft segments, various properties such as surface hardness, heat resistance, chemical resistance, and wear resistance may be realized.

The block copolymer has a structure including at least two hard segments and at least one soft segment. As a specific structure of the block copolymer, as the A-B-A type, two hard segments (A) and one soft segment (B) may be mentioned.

As the aromatic vinyl compound corresponding to the hard segment, styrene, C1 to C10 alkyl substituted styrene, halogen substituted styrene, or a combination thereof may be used. Specific examples of the alkyl substituted styrenes include o-ethyl styrene, m-ethyl styrene, p-ethyl styrene, α-methyl styrene, and the like. These aromatic vinyl compounds may be used in the form of monomers or polymers in their kind.

Examples of the conjugated diene compound corresponding to the soft segment include C4 to C6 butadiene, muxisoprene, ethylene-butadiene, ethylene-propylene, ethylene-isoprene, ethylene-ethylene-propylene, and the like. Butadiene can be used. The conjugated diene-based compound may be used in the form of monomers or polymers of these kinds.

The block copolymer may be composed of 20 to 35 weight% of the aromatic vinyl compound and 65 to 80 weight% of the conjugated diene compound, and specifically 27 to 35 weight% of the aromatic vinyl compound and 65 to 65 weight% of the conjugated diene compound. 73 weight percent. When the aromatic vinyl compound and the conjugated diene compound are formed in the above ratio, the elastic force is good and a low surface hardness can be obtained.

Specific examples of the block copolymers include styrene-ethylene-butadiene-styrene (SEBS) block copolymers, styrene-ethylene-propylene-styrene (SEPS) block copolymers, styrene-isoprene-styrene (SIS) block copolymers, and styrene- Ethylene-isoprene-styrene (SEIS) block copolymers, styrene-ethylene-ethylene-propylene-styrene (SEEPS) block copolymers, or combinations thereof, but is not limited thereto. Among these, styrene-ethylene-butadiene-styrene (SEBS) block copolymer, styrene-ethylene-propylene-styrene (SEPS) block copolymer, styrene-ethylene-isoprene-styrene (SEIS) block copolymer, or styrene-ethylene Isoprene-styrene (SEIS) block copolymers.

The weight average molecular weight of the block copolymer may be 140,000 to 180,000 g / mol, specifically 147,000 to 170,000 g / mol. When the block copolymer has a weight average molecular weight in the above range it is excellent in tensile strength and elongation at low surface hardness.

The block copolymer may be included in an amount of 25 to 55% by weight, specifically, 27 to 45% by weight based on the total amount of the thermoplastic rubber composition. When the block copolymer is used within the above range, the surface ductility is excellent, and mechanical properties such as heat resistance and chemical resistance are excellent.

(B) paraffin oil

The paraffin oil acts as a softener for thermoplastic rubbers and is used to improve elongation.

The weight average molecular weight of the paraffin oil may be 400 to 1,200 g / mol, specifically 600 to 900 g / mol. Mixing during extrusion is advantageous if the weight average molecular weight of the paraffin oil is within the above range.

The paraffin oil may have a kinematic viscosity of 95 to 215 cSt at 40 ° C., specifically 100 to 210.5 cSt. Mixing during extrusion is advantageous if the kinematic viscosity of the paraffin oil is within the above range.

In addition, the paraffin oil may have a specific gravity (15/4 ° C.) of 0.75 to 0.95, and specifically 0.85 to 0.9. In addition, the paraffin oil may have a flash point of 250 to 330 ° C, specifically 270 to 300 ° C. In addition, the paraffin oil may have a pour point of -18 to -9 ° C.

The paraffin oil may be included in 20 to 50% by weight, specifically, 30 to 45% by weight based on the total amount of the thermoplastic rubber composition. When paraffin oil is used in the above range, it is excellent in elongation and processability, and mechanical properties such as heat resistance and chemical resistance.

(C) polyolefin resin

The polyolefin resin is used to improve the mechanical properties of the thermoplastic rubber and processability during injection molding. Various characteristics of the thermoplastic rubber may be realized according to the shape, molecular weight, density, melt index, mechanical properties, and the like of the polyolefin resin.

The polyolefin resin may be polyethylene resin, polypropylene resin, polybutylene resin, ethylene-propylene copolymer resin, ethylene-vinyl alcohol copolymer resin or a combination thereof, and among these, polypropylene resin may be preferably used. The polypropylene resin may be a homo polypropylene resin. When the homo polypropylene resin is used, the tensile strength is excellent.

The polyolefin resin may have a melt index (230 ° C., 2.16 kg) of 11 to 25 g / 10 min, and specifically 15 to 23 g / 10 min. In the case of having a melt index in the above range it is advantageous to the product formation during injection due to the high flow.

The polyolefin resin may have a density of 0.85 to 1.1 g / cm ³ , and a tensile strength (yield point, 50 mm / min) may be 300 to 380 kg / cm ² .

The polyolefin resin may be included in 5 to 15% by weight, specifically 6 to 12% by weight based on the total amount of the thermoplastic rubber composition. When the polyolefin resin is used within the above-mentioned range, mechanical properties such as heat resistance and chemical resistance and workability are excellent.

(D) inorganic additives

The inorganic additive is used to improve the processability of the thermoplastic rubber.

The inorganic additives may be used in both particulate or fibrous form, preferably granular form. When used in the particulate form, the particle size of the inorganic additive may be 0.01 to 5 ㎛, in the case of the range is excellent in tensile strength at high temperature.

As the inorganic additive, calcium carbonate, talc, clay, silica, mica, titanium dioxide, carbon black, graphite, wollastonite, nanosilver or a combination thereof may be used, but is not limited thereto. Among them, calcium carbonate or talc may be preferably used, and more preferably calcium carbonate.

The inorganic additive may be coated with a surface treating agent such as a coupling agent, but it is preferable to use it in an uncoated state.

The inorganic additive may be included in 5 to 20% by weight, specifically 10 to 17% by weight based on the total amount of the thermoplastic rubber composition. When the inorganic additive is used within the above range, mechanical properties such as heat resistance and chemical resistance and workability are excellent.

(E) polyphenylene ether resin

By using the said polyphenylene ether resin, the ductility at the high temperature of a thermoplastic rubber, surface hardness, a restoring force, etc. can be improved further.

The polyphenylene ether resin may be a polyphenylene ether resin alone or a mixture of a polyphenylene ether resin and a vinyl aromatic polymer.

Examples of the polyphenylene ether resin include poly (2,6-dimethyl-1,4-phenylene) ether, poly (2,6-diethyl-1,4-phenylene) ether, poly (2,6-di Propyl-1,4-phenylene) ether, poly (2-methyl-6-ethyl-1,4-phenylene) ether, poly (2-methyl-6-propyl-1,4-phenylene) ether, poly (2-ethyl-6-propyl-1,4-phenylene) ether, poly (2,6-diphenyl-1,4-phenylene) ether, poly (2,6-dimethyl-1,4-phenylene ) Copolymer of poly (2,3,6-trimethyl-1,4-phenylene) ether, poly (2,6-dimethyl-1,4-phenylene) ether and poly (2,3,6- What is chosen from the group which consists of a copolymer of triethyl-1, 4-phenylene) ether, and a combination thereof can be used. Among them, poly (2,6-dimethyl-1,4-phenylene) ether or poly (2,6-dimethyl-1,4-phenylene) ether and poly (2,3,6-trimethyl-1 Copolymers of, 4-phenylene) ether can be used, and more preferably poly (2,6-dimethyl-1,4-phenylene) ether can be used.

As the vinyl aromatic polymer, those obtained by polymerizing vinyl aromatic monomers such as styrene, para ρ-methyl styrene, α-methyl styrene, and 4-N-propyl styrene with each other can be used. Among these, styrene and α-methyl styrene are preferably used. A polymerized thing can be used.

The degree of polymerization of the polyphenylene ether-based resin is not particularly limited, but considering the thermal stability and workability of the resin composition, the intrinsic viscosity when measured in a chloroform solvent at 25 ° C. is 0.2 to 0.8 dl / g. Can be used.

The weight average molecular weight of the polyphenylene ether resin may be 20,000 to 40,000 g / mol. When the weight average molecular weight of the polyphenylene ether resin is within the above range, mechanical properties such as heat resistance and chemical resistance and workability are excellent.

The polyphenylene ether resin may be determined according to the molecular weight and content of the aromatic vinyl compound corresponding to the hard segment of the block copolymer (A) described above.

The polyphenylene ether-based resin may be included in 3 to 15% by weight, specifically 5 to 11% by weight based on the total amount of the thermoplastic rubber composition. When polyphenylene ether-based resin is used within the above range, not only the ductility at the high temperature, the surface hardness and the restoring force but also the processability are excellent.

(F) Polypropylene-Silicone Rubber Masterbatch

The polypropylene-silicone rubber masterbatch is used to improve the wear resistance, it is possible to obtain an excellent improvement effect even using a small amount.

The polypropylene used in the polypropylene-silicone rubber masterbatch may be homo polypropylene, in which case the tensile strength is excellent.

In addition, the polypropylene may have a weight average molecular weight of 35,000 to 40,000 g / mol, melt melting index (190 ℃, 2.6kg) of 25 to 40 g / 10min, intrinsic viscosity of 1.1 to 1.2 dL / g.

The silicone rubber used in the polypropylene-silicone rubber masterbatch is a siloxane-based compound, for example, hexamethylcyclotrisiloxane, octaoctacyclocyclosiloxane, vindecamethylcyclopentasiloxane, ductodecamethylcyclohexasiloxane And cyclosiloxanes such as trimethyltriphenylcyclotrisiloxane, tetramethyltetraphenylcyclotetrasiloxane, and octaphenylcyclotetrasiloxane, and these may be used alone or in combination of two or more thereof. At this time, curing agents such as trimethoxymethylsilane, triethoxyphenylsilane, tetramethoxysilane and tetraethoxysilane can be used.

In addition, the silicone rubber may use a weight average molecular weight of 80,000 to 100,000 g / mol, specific gravity of 0.95 to 0.98.

The polypropylene-silicon rubber masterbatch may be made of the polypropylene and the silicone rubber in a weight ratio of 1: 0.5 to 1: 1.5. When the weight ratio is in the range, the stiffness and impact resistance of the polypropylene-silicon rubber masterbatch are excellent and may have excellent dispersibility in the preparation of the thermoplastic rubber composition.

The polypropylene-silicone rubber masterbatch may be included in an amount of 0.01 to 5% by weight, specifically, 0.1 to 1.5% by weight based on the total amount of the thermoplastic rubber composition. When the polypropylene-silicone rubber masterbatch is used within the above range, it is not only excellent in ductility, surface hardness and restoring force at high temperature but also excellent in workability.

(G) other additives

The thermoplastic rubber composition may include an antibacterial agent, a heat stabilizer, an antioxidant, a release agent, a light stabilizer, a surfactant, a coupling agent, a plasticizer, a admixture, a colorant, a stabilizer, a lubricant, an antistatic agent, a colorant, a flame retardant, a weather agent, a ultraviolet absorber, a sunscreen, Additives of flame retardants, fillers, nucleators, adhesion aids, pressure sensitive adhesives or combinations thereof may be further included.

The antioxidant may be a phenol, phosphite, thioether or amine antioxidant, the release agent is a fluorine-containing polymer, silicone oil, metal salt of stearic acid, montanic acid Metal salts, montanic acid ester waxes or polyethylene waxes may be used. In addition, a benzophenone type or an amine type weathering agent may be used as the weathering agent, a dye or a pigment may be used as the coloring agent, and titanium dioxide (TiO ₂ ) or carbon black may be used as the sunscreen. In addition, talc or clay may be used as the nucleating agent.

The additive may be suitably included within a range that does not impair the physical properties of the thermoplastic rubber composition, specifically, may be included in 40 parts by weight or less based on 100 parts by weight of the total amount of the thermoplastic rubber composition, more specifically 0.1 to 30 weight It can be included as a wealth.

Surface hardness according to KS M 6518 of the thermoplastic rubber composition (Shore A) has excellent surface hardness characteristics of 50A or less.

The thermoplastic rubber composition according to one embodiment may be prepared by a known method for preparing a resin composition. For example, the components and other additives according to one embodiment may be mixed simultaneously, then melt extruded in an extruder and prepared in pellet form.

According to another embodiment, a molded article manufactured by molding the aforementioned thermoplastic rubber composition is provided. That is, a molded article can be manufactured by various processes, such as injection molding, blow molding, extrusion molding, and thermoforming, using the said thermoplastic rubber composition. In particular, it can be usefully used for various molded products such as electric and electronic parts, automotive parts, etc. which require heat resistance, chemical resistance, workability, wear resistance, etc. as well as excellent ductility, surface hardness, and resilience at high temperatures, and in particular, diaphragms for washing machines This can be useful for diaphragm.

Hereinafter, preferred embodiments of the present invention will be described. However, the following examples are only preferred embodiments of the present invention, and the present invention is not limited by the following examples.

[Example]

Each component used in the preparation of the thermoplastic rubber composition according to one embodiment is as follows.

(A) block copolymer

G1651 from Kryton, a styrene-ethylene-butadiene-styrene (SEBS) block copolymer consisting of 33% by weight of styrene for hard segments and 67% by weight of ethylene-butadiene for soft segments, was used. In this case, the weight average molecular weight of the block copolymer is 150,000 g / mol.

(B) paraffin oil

A weight average molecular weight of 740 g / mol, specific gravity (15/4 ° C.) of 0.88, a flash point of 300 ° C., and a kinematic viscosity of KL-1100 manufactured by Seojin Chemical Co., Ltd. were used at 40 ° C. and 210.5 cSt.

(C) polyolefin resin

Homo polypropylene with melt index (230 ° C, 2.16kg) of 22 g / 10min, density 0.91 g / cm ³ and tensile strength (yield point, 50mm / min) of 380 kg / cm ² -700 was used.

(D) inorganic additives

Calcium carbonate (Omiya 2-HB, Omiya Corp.) having a particle size of 2 μm was used.

(E) polyphenylene ether resin

A polyphenylene ether resin having a weight average molecular weight of 25,000 to 30,000 g / mol was used.

(F) Polypropylene-Silicone Rubber Masterbatch

Dow-Corning's MB50-001 product was used, consisting of 50% by weight homopolypropylene and 50% by weight silicone.

Ethylene-propylene-diene rubber (EPDM)

In Comparative Example 2, ethylene-propylene-diene rubber (manufactured by Dong-A Chemical), which was a thermosetting rubber, was used.

Examples 1 and 2 and Comparative Examples 1 and 2

The components are mixed according to the contents of Table 1 below, and after mixing at a fixed temperature of 240 ° C. and 40 rpm for 25 minutes using a Banbari mixer, using a twin screw extruder having L / D = 24 and Φ = 45 mm. The pellet was produced by extrusion under the conditions of a fixed temperature of 240 ° C., a screw rotational speed of 300 rpm and a self-feeding speed of 25 rpm.

[Test Example]

The prepared pellets were dried at 60 ° C. for 4 hours and then injected under conditions of an injection temperature of 240 ° C. in a 10 oz injection machine to prepare specimens for evaluation of physical properties, and then the physical properties were measured by the following method. Table 1 shows.

(1) Surface Hardness (Shore A): The surface hardness of Shore A was measured according to KS M 6518.

(2) Abrasion: 1) Calbrase Wheel was CS-10 x 2ea, load and rotational Rpm was measured 1000 times under the condition of 500g x 2ea (70rpm), 2) Calbrase Wheel is CS-17 x 2ea, The load and rotational Rpm were repeatedly measured 2000 times, 4000 times, 8000 times, and 12000 times under the condition of 500 g × 2ea (70 rpm). Both 1) and 2) were measured by ASTM D1175, D1044 method.

TABLE 1

Example 1 Example # 2 Comparative Example 1 Comparative Example 2 (A) Block copolymer (% by weight) 31.5% 31.5% 31.5% - (B) paraffin oil (% by weight) 40.5% 40.5% 40.5% - (C) polyolefin resin (% by weight) 9.9% 9.9% 9.9% - (D) inorganic additive (% by weight) 12.6% 12.6% 12.6% - (E) polyphenylene ether resin (% by weight) 4.5% 4.0% 5.5% - (F) Polypropylene-Silicone Rubber Masterbatch (% by weight) 1.0% 1.5% - - * Ethylene-propylene-diene rubber (EPDM) (% by weight) - - - 100 Surface Hardness (Shore A) 43 49 43 45 Abrasion Amount (g) 1) 1000 times 0.13 0.12 0.26 0.21 2) 2000 times 0.07 0.07 0.39 0.42 4000 times 0.13 0.13 0.82 0.80 8000 0.37 0.37 1.60 1.58 12000 times 0.49 0.49 2.40 2.43

Through Table 1, as a thermoplastic rubber according to one embodiment, in the case of Example 1 using all of the block copolymer, paraffin oil, polyolefin resin, inorganic additives, polyphenylene ether-based resin and polypropylene-silicone rubber masterbatch Even if the polypropylene-silicon rubber masterbatch is added, the surface hardness (Shore A) is shown to be 50A or less, it can be confirmed that not only has excellent surface hardness characteristics, but also excellent wear resistance.

On the other hand, it can be seen that in the case of Comparative Example 1, which does not use a polypropylene-silicon rubber masterbatch, and Comparative Example 2, which uses ethylene-propylene-diene rubber, which is a thermosetting rubber, wear resistance is reduced.

The present invention is not limited to the above embodiments, but may be manufactured in various forms, and a person skilled in the art to which the present invention pertains has another specific form without changing the technical spirit or essential features of the present invention. It will be appreciated that the present invention may be practiced as. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

Claims (16)

(A) a block copolymer comprising at least two aromatic vinyl compounds and at least one conjugated diene compound; (B) paraffin oil; (C) polyolefin resin; (D) inorganic additives; (E) polyphenylene ether resin; And (F) The thermoplastic rubber composition wherein the polypropylene-silicone rubber masterbatch (F) is contained in an amount of from 0.01 to 5% by weight relative to the total amount of the thermoplastic rubber composition comprising the polypropylene-silicone rubber masterbatch. The method of claim 1, The thermoplastic rubber composition is based on the total amount of the thermoplastic rubber composition 25 to 55% by weight of the block copolymer (A), 20 to 50% by weight of the paraffin oil (B), 5 to 15% by weight of the polyolefin resin (C), A thermoplastic rubber composition comprising 5 to 20% by weight of an inorganic additive (D) and 3 to 15% by weight of the polyphenylene ether resin (E). The method of claim 1, The block copolymer (A) is a thermoplastic rubber composition comprising 20 to 35% by weight of the aromatic vinyl compound and 65 to 80% by weight of the conjugated diene compound. The method of claim 1, The block copolymer (A) is a styrene-ethylene-butadiene-styrene (SEBS) block copolymer, a styrene-ethylene-propylene-styrene (SEPS) block copolymer, a styrene-isoprene-styrene (SIS) block copolymer, a styrene- A thermoplastic rubber composition comprising an ethylene-isoprene-styrene (SEIS) block copolymer, a styrene-ethylene-ethylene-propylene-styrene (SEEPS) block copolymer, or a combination thereof. The method of claim 1, The thermoplastic rubber composition of the block copolymer (A) has a weight average molecular weight of 140,000 to 180,000 g / mol. The method of claim 1, The paraffin oil (B) has a kinematic viscosity (kinematic viscosity) of 40 to 95 to 215 cSt thermoplastic rubber composition. The method of claim 1, The polyolefin resin (C) is a thermoplastic rubber composition of the melt index (230 ℃, 2.16kg) is 11 to 25 g / 10min. The method of claim 1, The polyolefin (C) resin is a thermoplastic rubber composition comprising polyethylene resin, polypropylene resin, polybutylene resin, ethylene-propylene copolymer resin, ethylene-vinyl alcohol copolymer resin or a combination thereof. The method of claim 1, The polyolefin (C) resin is a homogeneous polypropylene resin. The method of claim 1, The particle size of the inorganic additive (D) is from 0.01 to 5 ㎛ thermoplastic rubber composition. The method of claim 1, The inorganic additive (D) is a thermoplastic rubber composition comprising calcium carbonate, talc, clay, silica, mica, titanium dioxide, carbon black, graphite, wollastonite, nanosilver or a combination thereof. The method of claim 1, The polyphenylene ether resin (E) is a thermoplastic rubber composition having a weight average molecular weight of 20,000 to 40,000 g / mol. The method of claim 1, The polypropylene-silicone rubber masterbatch (F) is a thermoplastic rubber composition comprising a homo polypropylene. The method of claim 1, The polypropylene-silicon rubber masterbatch (F) is a thermoplastic rubber composition of the polypropylene and the silicone rubber in a weight ratio of 1: 0.5 to 1: 1.5. The method of claim 1, The thermoplastic rubber composition according to KS M 6518 of the thermoplastic rubber composition is 50A or less. A molded article made from the thermoplastic rubber composition of any one of claims 1 to 15.