KR20080069364A - High flow olefinic thermoplastic resin composition with excellent scratch resistance - Google Patents

Abstract

An olefin thermoplastic resin composition is provided to ensure an excellent injection moldability in double injection and flexibility of soft texture by controlling the crosslinking degree and imparting high flow property, so that the olefinic thermoplastic resin composition can be used as a top ceiling material such as door trim panel, instrument panel as well as arm rest. An olefinic thermoplastic resin composition comprises 100 parts by weight of base resin composition comprising (A) 5-50 wt% of polypropylene resin, (B) 5-50 wt% of a thermoplastic elastomer, (C) 10-60 wt% of processing oil and (D) 1-30 wt% of an organic filler, and further (E) 0.02-5 parts by weight of an organic peroxide-based crosslinking agent,(F) 0.1-5 parts by weight of a crosslinking aid, and (G) 0.01-5 parts by weight of scratch resistance additives.

Description

High flow olefin thermoplastic resin composition with excellent scratch resistance {HIGH FLOW OLEFINIC THERMOPLASTIC RESIN COMPOSITION WITH EXCELLENT SCRATCH RESISTANCE}

The present invention relates to an olefinic thermoplastic resin composition, and more particularly, to a high flow olefinic thermoplastic resin composition having excellent scratch resistance, which is excellent in injection moldability and exhibits soft texture flexibility, which is suitable as a skin treatment agent for large parts for automobiles. It is about.

Recently, the automobile field has been actively researched not only for the enhancement of interior materials but also for the simplification of the production process.

In order to express the luxurious feeling of automobile interior materials, a resin composition made of PPF (polypropylene filler) or PC / ABS is injected, and then PVC (polyvinyl-chloride) or olefin-based thermoplastic resin manufactured by calendering is used. It is possible to bond the skin agent prepared through several steps such as foam molding of the used sheet and urethane, or through powder slash molding (PSM) using polyolefin-based thermoplastic resin and polyurethane resin. As an overlay, there is a method of manufacturing large parts such as a door trim pannel or an instrument pannel with improved sensitivity.

This manufacturing method is complicated because the product is completed through a multi-step process, there is a problem that the unit cost of the product rises, it is applicable only to some high-end models.

However, the current consumer demands such luxury not only luxury cars but also general cars because the importance of emotional quality.

Therefore, it is possible to apply to general vehicle models by simplifying the process and lowering the product cost, and the need for technology development for materials capable of expressing the feeling of high-quality materials is gradually increasing.

Conventionally developed advanced materials are known resin compositions to which partially crosslinked thermoplastic elastomers or fully crosslinked thermoplastic elastomers are applied. However, when the resin composition is applied, the flow flowability is very low, so it is not easy to make double injection on a large injection molding, and when attempting double injection, even if injection is performed, a short shot or a flow flow mark ( There is a problem that it is difficult to apply to large injection molding such as door trim panel or instrument panel due to flow mark). As another material, a polyolefin resin having a high flow property is known, but when the double injection is applied by applying this, there is a problem in that the hardness of the product is high and it is difficult to express a luxurious and soft feeling. In addition, in the case of the partially crosslinked or fully crosslinked thermoplastic olefin resin composition, scratch characteristics are very weak in view of resin properties.

As a method for improving this disadvantage, a method of increasing scratch resistance by adding an additive that increases slippery, adding a filler or a nano compound having a high aspect ratio, or adding a silicon-derived compound is known. However, in the case of using the slip additive, after the molding, the additive is transferred to the surface of the molded article, or the surface of the molded article becomes sticky, and there is a problem in that paintability and adhesion are reduced. In addition, in the case of using a filler or a nano-compound, it is difficult to apply a wide range of physical properties such as impact characteristics, and the silicone-induced compound also has a problem that the transition to the surface of the molded article is difficult to apply.

In this regard, U. S. Patent No. 6,207, 754 (registered on March 27, 2001) is a thermoplastic olefin resin composition that can be applied as an interior coating agent for automobiles, which includes (A) 40 to 60 wt% of impact modified polypropylene resin, and (B) ethylene content. 87 to 97.5 mole%, density of 0.865 to 0.920 g / cc, 10 to 70% by weight of plastomer having a weight average molecular weight of 70,000 or more, (C) 5 to 20% by weight of a separate olefin copolymer elastomer, (D) A thermoplastic olefin resin composition having a melt index of 00.5 to 5 g / 10 minutes, including a coupling agent and an activator compound, is disclosed. However, the thermoplastic olefin resin composition is a resin composition for calendering, and has a low melt flowability, so when it is applied to the double injection of large parts requiring high flow flowability for the skin agent, it is unformed or flow mark. It is difficult to apply because it occurs.

Korean Laid-Open Patent Publication No. 2004-0008806 (published Jan. 31, 2004) is a polyolefin resin composition having a high flow property for application in the injection of large parts, and the polyolefin resin composition is (A) a homopolymer or propylene- of propylene- Ethylene copolymer, 60 to 80 parts by weight of a highly crystalline polypropylene resin having a melt index of 20 to 80 g / 10 minutes (230 ° C.) and an isotactic index of 97 to 100, (B) ethylene-α-olefin air 10-30 parts by weight of copolymer rubber, and (C) at least one inorganic filler selected from the group consisting of talc, calcium carbonate, calcium sulfate, magnesium oxide, calcium stearate, mica, silica, calcium silicate, clay, and carbon black. Disclosed is a polypropylene resin composition containing 25 parts by weight. However, the resin composition is difficult to express a soft and luxurious feeling due to the lack of a rubber content exhibiting soft properties, and is not suitable as a double injection material for the skin of large parts such as door trim panels or instrument panels of automobiles.

Therefore, it is a material for the skin of large parts such as door trim panels or instrument panels of automobiles, and it can express a luxurious and soft feeling, and research on the double injection material that has excellent scratch resistance compared to general crosslinked rubber It is more necessary.

In order to solve the problems of the prior art as described above, the present invention provides an excellent olefin-based thermoplastic resin composition, which is excellent in the injection molding property of large parts and exhibits soft texture flexibility, suitable for the skin of automotive parts, excellent scratch resistance For the purpose of

The above and other objects of the present invention can be achieved by the present invention described below.

In order to achieve the above object, the present invention is (A) 5 to 50% by weight polypropylene resin, (B) 5 to 50% by weight thermoplastic elastomer, (C) 10 to 60% by weight processing oil, and (D) inorganic (2) 0.02 to 5 parts by weight of (E) organic peroxide-based crosslinking agent, 0.1 to 5 parts by weight of (F) crosslinking aid, and (G) scratch resistance additive based on 100 parts by weight of the basic resin composition comprising 1 to 30% by weight of filler. It provides the olefin-based thermoplastic resin composition comprising a to 5 parts by weight.

Hereinafter, the present invention will be described in detail.

The inventors of the present invention have been studying the materials for the skin preparation of large parts such as door trim panels and instrument panels of automobiles, and the organic peroxide-based resins are composed of basic resin compositions composed of polypropylene resins, thermoplastic elastomers, processing oils, and inorganic fillers. The olefinic thermoplastic resin composition comprising a crosslinking agent, a crosslinking aid, and a scratch resistant additive is capable of double-injection on the surface of a large part, has excellent physical and chemical properties, as well as high flow characteristics, and scratch resistance. Confirmation of the excellent, based on this, the present invention was completed.

The olefinic thermoplastic resin composition of the present invention is a resin composition comprising an organic peroxide crosslinking agent, a crosslinking aid and a scratch resistant additive in a basic resin composition composed of a polypropylene resin, a thermoplastic elastomer, a processing oil, and an inorganic filler.

The basic resin composition used in the present invention consists of a polypropylene resin, a thermoplastic elastomer, a processing oil, and an inorganic filler.

The polypropylene resin may be used alone or in combination of two or more of a propylene homopolymer, a block or random copolymer of propylene and an α-olefin, and a propylene copolymer of propylene, ethylene and an α-olefin.

The polypropylene resin may use a melt index of 0.1 to 100 g / 10min at 230 ℃, 2.16 kg load, it is to use a 0.1 to 60 g / 10min. If the melt index is less than 0.1 g / 10min, there is a problem that the flow characteristics of the final thermoplastic resin product is lowered, and if the melt index exceeds 100 g / 10min, there is a problem that the banbury needer processing is difficult.

As the α-olefin monomer, one or more selected from the group consisting of ethylene, 1-butene, 1-pentene and 1-hexene may be used. .

The polypropylene resin may be included in an amount of 5 to 50% by weight, and preferably 10 to 40% by weight, based on the total content of the basic resin composition consisting of a polypropylene resin, a thermoplastic elastomer, a processing oil, and an inorganic filler. If the content is less than 5% by weight, the mechanical properties such as tensile strength of the final injection molded product is lowered, and when the content exceeds 50% by weight, the hardness is high, so that a desired soft feeling cannot be obtained.

The thermoplastic elastomer can be used alone or in combination of two or more of an α-olefin copolymer, an olefin copolymer rubber or a styrene copolymer.

The α-olefin copolymer or the olefin copolymer rubber may be partially crystalline, or may be a random copolymer prepared by copolymerizing two or more monoolefins as an amorphous material.

As the olefin copolymer rubber, in particular, ethylene-propylene-diene terpolymer copolymer or ethylene-propylene rubber (ethylene-propylene-rubber) copolymerized using ethylene and propylene as a main component is used. It is desirable to. Specific examples include ethylene-propylene-dicyclo pentadiene, ethylene-propylene-1,4-hexadiene, ethylene-propylene-methylenenorbornene (ethylene-propylene-methylene norbonene), ethylene-propylene-ethylidene norbonene, ethylene-propylene-cyclohexadiene and derivatives thereof One or more kinds thereof can be used, and preferably, an ethylene-propylene-ethylidene norbornene copolymer having a high crosslinking reaction rate is used.

The olefin-based copolymer rubber is preferably used alone or in combination to handle the viscosity ML _{1 +4} of 20 to 100 eseo 125 ℃.

The styrene-based copolymer may be a copolymer elastomer of styrene and an aliphatic unsaturated hydrocarbon having 2 to 10 carbon atoms. Specific examples include styrene-butadiene-styrene copolymer elastomer (SBS), styrene-isoprene-styrene copolymer elastomer (SIS), styrene-ethylene-propylene-styrene copolymer elastomer (SEPS) or styrene-ethylene-butylene-styrene Copolymer elastomer (SEBS) or the like can be used, and preferably, styrene-ethylene-butylene-styrene copolymer is used.

The thermoplastic elastomer may be included in 5 to 50% by weight based on the total content of the base resin composition, preferably 10 to 40% by weight. If the content is less than 5% by weight, the content of the non-conjugated diene, which may cause crosslinking reaction, decreases, resulting in a low degree of crosslinking. Therefore, it is difficult to obtain desired physical and chemical properties. There is a problem that this reduction is difficult to apply to products that require high flow flow characteristics.

Processing oils serve to improve processability and physical properties, and in general, paraffin-based, naphthene-based, or aromatic oils can be used. In particular, it is preferable to use paraffin type mineral oil whose firing temperature is 250-580 degreeC. In the case of using an aromatic oil, there is a limit in generating an odor or implementing a color.

The processing oil preferably has a ignition temperature of 260 to 320 ℃.

The processing oil may be included in 10 to 60% by weight, preferably 20 to 50% by weight based on the total content of the base resin composition. If the content is less than 10% by weight, it is difficult to plasticize the resin, the flow flow characteristics are low, and if it exceeds 60% by weight, blocking of the product later or bleeding of the oil after molding the final product There is a problem that occurs.

Inorganic fillers play a role of reinforcing physical properties or reducing gloss, specifically, talc, calcium carbonate (CaCO ₃ ), barium sulfate (BaSO ₄ ), aluminum hydroxide (Al ₂ O ₃ ), and titanium dioxide ( TiO ₂ ), zinc oxide (ZnO), magnesium oxide (MgO), mica, wallastonite, silica, kaolin, clay or carbon black, and the like. It is preferable to use.

It is preferable that the said inorganic filler is 0.1-15 micrometers in average particle diameter, More preferably, it is 0.1-10 micrometers in average particle diameter.

The inorganic filler may be included in an amount of 1 to 30% by weight, preferably 5 to 20% by weight based on the total content of the basic resin composition. If the content is less than 1% by weight, there is a problem in that the use of the inorganic filler is insignificant to increase the gloss in the final molded product.When the content is more than 30% by weight, the specific gravity is increased, the flow characteristics are decreased, and the aggregation of the inorganic filler Due to the phenomenon, there is a problem that the mechanical properties are lowered.

The olefinic thermoplastic resin composition of the present invention comprises an organic peroxide crosslinking agent, a crosslinking aid and a scratch resistant additive in the basic resin composition composed of the above components.

Organic peroxide crosslinkers include benzoyl peroxide, lauryl peroxide, dicumyl peroxide, 1,3-bis (t-butylperoxyisopropyl) benzene, di-t-butylperoxide, 2,5-dimethyl -2,5-di (t-butylperoxyl) hexane, 2,5-dimethyl-2,5- (t-butylperoxyl) hexane, p-chlorobenzoyl peroxide, n-butyl-4,4-bis (t-butylperoxy) valyrate or 2,4-dichlorobenzoyl peroxide and the like can be used. Most preferably, 1,3-bis (t-butylperoxyisopropyl) benzene is used in consideration of odor and scorch stability.

The organic peroxide-based crosslinking agent may be used by adjusting the content according to the degree of crosslinking and fluidity of the final product, it is preferred to use from 0.02 to 5 parts by weight based on 100 parts by weight of the basic resin composition.

The crosslinking aid prevents excessive decomposition of the polypropylene resin and maintains the stability of radicals generated by the crosslinking agent. The crosslinking aid is divinylbenzene, ethylene glycol dimethacrylate, triallyl cyanurate, diethylene glycol di. Methacrylate, allyl methacrylate, trimethylolpropane trimethacrylate, and the like can be used, and preferably triallyocyanurate is used.

The crosslinking aid is preferably used in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the basic resin composition.

Scratch-resistant additives include siloxane-based, polyorganosiloxane-based, metal stearates, saturated fatty acid amides, and unsaturated fatty acid amides. Flake-type inorganic fillers such as wallasonite or mica, epoxy resins, maleic carboxylic acids, maleic carboxylic anhydrides , alpha or beta unsaturated carboxylic esters, alpha or beta unsaturated carboxylic acids, alpha or beta unsaturated carboxylic acids, alpha or beta unsaturated carboxylic esters beta unsaturated carboxylic anhydrides, functionalized maleic alpha olefic with long chain alcohol or long chain amine functional groups, primary or secondary fats Amides (primary or secondary fatty acid amide) and the like can be used. Preferably using a maleic alpha olefic, primary or secondary fatty acid amide, or the like having a long chain alcohol or long chain amine functional group will be.

The scratch resistance additive is preferably used in 0.01 to 5 parts by weight based on 100 parts by weight of the basic resin composition.

In addition to the above components, the olefinic thermoplastic resin composition of the present invention may further include a small amount of an additive such as an antioxidant, a heat stabilizer, an ultraviolet stabilizer, an antistatic agent, and the like within an appropriate content range, as necessary.

The olefin-based thermoplastic resin composition of the present invention can be applied to large parts such as automotive interior and exterior materials, building interior and exterior materials, and electrical and electronic products.

Hereinafter, preferred examples are provided to aid the understanding of the present invention, but the following examples are merely for exemplifying the present invention, and it will be apparent to those skilled in the art that various changes and modifications can be made within the scope and spirit of the present invention. It is natural that such variations and modifications fall within the scope of the appended claims.

EXAMPLE

Example 1

25 parts by weight of random polypropylene having a melt index of 1 g / 10 min, 10 parts by weight of ethylene-propylene-diene (EPDM) having a pattern viscosity of ML _{1 + 4} at 125 ° C. and a Mooney viscosity ML _{1 +} at 125 ° C. _{4 parts} of ethylene-propylene-diene (EPDM) having 80 of 80, 50 parts by weight of paraffinic oil having a ignition temperature of 300 ° C., and 5 parts by weight of talc having an average particle diameter of 5 μm with an inorganic filler. 100 parts by weight of the basic resin composition was prepared by uniformly mixing the mixture.

1.0 weight of an organic compound-based scratch resistant agent composed of a mixture of maleic alpha olefin amine and fatty acid amide by adding 5 parts by weight of an organic peroxide crosslinking agent, 1.5 parts by weight of a crosslinking aid, and other antioxidants and weathering stabilizers to the premixed base resin composition. After the addition, the extrusion was carried out using a twin screw extruder at 190 to 230 ° C., followed by cooling to obtain a resin composition in pellet form. Then, the injection molding using an injection molding machine having a temperature of 200 ℃ and evaluated the physical properties.

Example  2

30 parts by weight of random polypropylene having a melt index of 1 g / 10min as a basic resin composition in Example 1, and 20 parts by weight of ethylene-propylene-diene (EPDM) having a pattern viscosity of ML _{1 + 4} of 50 at 125 ° C. 10 parts by weight of ethylene-propylene-diene (EPDM) having a Mooney viscosity ML _{1 + 4} of 80 at 125 ° C., 5 parts by weight of styrene-ethylene-butylene-styrene (SEBS) having a melt index of 5.0 g / 10 min., Paraffinic. The process was carried out in the same manner as in Example 1, except that 30 parts by weight of the processing oil and 5 parts by weight of talc were used as the inorganic filler, and 2.0 parts by weight of polysiloxane, which is a scratch resistant silicone.

Example  3

25 parts by weight of random polypropylene having a melt index of 1 g / 10min as a basic resin composition in Example 1, and 20 parts by weight of ethylene-propylene-diene (EPDM) having a pattern viscosity of ML _{1 + 4} of 50 at 125 ° C. 10 parts by weight of ethylene-propylene-diene (EPDM) having a Mooney viscosity ML _{1 + 4} of 80 at 125 ° C., 5 parts by weight of styrene-ethylene-butylene-styrene (SEBS) having a melt index of 5.0 g / 10 min., Paraffinic. In the same manner as in Example 1, except that 35 parts by weight of the processing oil and 5 parts by weight of talc were used as the inorganic filler, and 2.0 parts by weight of the organic compound-based scratch agent composed of a mixture of maleic alpha olefin amine and fatty acid amide. Was carried out.

Example 4

30 parts by weight of random polypropylene having a melt index of 1 g / 10min as a basic resin composition in Example 1, and 20 parts by weight of ethylene-propylene-diene (EPDM) having a pattern viscosity of ML _{1 + 4} of 50 at 125 ° C. And 15 parts by weight of ethylene-propylene-diene (EPDM) having a Mooney viscosity ML _{1 + 4} of 80 at 125 ° C., 25 parts by weight of paraffinic processing oil and 10 parts by weight of talc as an inorganic filler, and 1.0 part by weight of a silicone-based scratch agent. The same procedure as in Example 1 was carried out except for use.

Comparative example  One

In Example 2, 40 parts by weight of random polypropylene and 20 parts by weight of paraffin-based processing oil were used, except that no silicone-based scratch was used.

Comparative Example 2

In Example 2, 45 parts by weight of random polypropylene and 15 parts by weight of paraffin-based processing oil were used, and the same method as in Example 2 was carried out except that a silicone-based scratch was not used.

Comparative Example 3

In Example 2, 10 parts by weight of ethylene-propylene-diene (EPDM) having a pattern viscosity of ML _{1 + 4} of 50 at 125 ° C. and ethylene-propylene-diene (EPDM) having a Mooney viscosity of ML _{1 + 4} of 80 at 125 ° C. Except 20 parts by weight, 10 parts by weight of talc, an inorganic filler, and 10 parts by weight of a silicone-based scratch agent, and no styrene-ethylene-butylene-styrene (SEBS) having a melt index of 5.0 g / min was used. It carried out in the same manner as in Example 2.

division Example Comparative example One 2 3 4 One 2 3 Polypropylene resin 25 30 25 30 40 45 30 EPDM 1 (ML _{1 +4} 50) 10 20 20 20 20 20 10 EPDM 2 (ML _{1 +4} 80) 10 10 10 15 10 10 20 SEBS - 5 5 - 5 5 - Processing oil 50 30 35 25 20 15 30 Inorganic Filler (Talk) 5 5 5 10 5 5 10 Organic peroxide 5 5 5 5 5 5 5 Crosslinking aid 1.5 1.5 1.5 1.5 1.5 1.5 1.5 Silicone-based scratch resistant agent 0 2.0 0 1.0 0 0 10 Organic Compound Scratch Agent 1.0 0 2.0 0 0 0 0

[Test Example]

The physical properties of the resin composition specimens prepared in Examples 1 to 4 and Comparative Examples 1 to 3 were measured by the following method, and the results are shown in Table 2 below.

* Flow index-measured according to ASTM D1238 standard.

* Tensile Strength and Elongation-It was measured according to ASTM D412 standard.

* Hardness-measured according to ASTM D2240 standard.

* Moldability-After injection molding of the instrument panel with the resin composition, flow marks, weld lines, partial gloss, appearance and the like were observed.

* Scratch resistance-After injection molding the specimen was loaded with 0.3 Kgf load and scraped at a rate of 0.2 times / min and the surface was observed.

division Example Comparative example One 2 3 4 One 2 3 Flow index (230 ℃, g / 10min) 21 11 20 4 0.5 2 10 Shore A Hardness 70 85 80 88 92 95 87 Specific gravity (g / cc) 0.97 0.97 0.97 1.02 0.97 0.97 0.97 Tensile strength (kgf / ㎠) 65 90 80 75 91 100 70 % Elongation 400 400 450 500 300 360 250 Formability ○ △ ◎ × × × △ Scratch resistance ○ ○ ◎ △ × × ×

As shown in Table 2, the olefin-based thermoplastic resin composition of Examples 1 to 4 according to the present invention was found to have a high flow index, excellent physical properties such as tensile strength and elongation, and at the same time excellent scratch resistance. .

As described above, according to the present invention, by controlling the degree of crosslinking and having a high flow flow characteristic, it is excellent in injection moldability during double injection and exhibits soft texture flexibility, such as an arm rest of an automobile. In addition to the parts, there is an effect of providing a high flow resistance olefin thermoplastic resin composition having excellent scratch resistance, suitable for the skin of a large part such as a door trim panel, an instrument panel and the like.

Claims (15)

Basic resin composition consisting of (A) 5 to 50% by weight of polypropylene resin, (B) 5 to 50% by weight of thermoplastic elastomer, (C) 10 to 60% by weight of processing oil, and (D) 1 to 30% by weight of inorganic filler Per 100 parts by weight, (E) 0.02 to 5 parts by weight of organic peroxide crosslinking agent, (F) 0.1 to 5 parts by weight of crosslinking aid, and (G) 0.01 to 5 parts by weight of scratch resistant additives Olefin thermoplastic resin composition. The method of claim 1, The polypropylene resin (A) is at least one member selected from the group consisting of a propylene homopolymer, a block or a random copolymer of propylene and an α-olefin, and a terpolymer of propylene, ethylene and an α-olefin. doing Olefin thermoplastic resin composition. The method of claim 1, The polypropylene resin (A) is characterized in that the melt index is 0.1 to 100 g / 10 min at 230 ℃, 2.16 kg load Olefin thermoplastic resin composition. The method of claim 1, The thermoplastic elastomer is at least one member selected from the group consisting of α-olefin copolymers, olefin copolymer rubbers and styrene copolymers. Olefin thermoplastic resin composition. The method of claim 4, wherein The olefin copolymer rubber is ethylene-propylene-dicyclopentadiene, ethylene-propylene-1,4-hexadiene, ethylene-propylene-methylenenorbornene, ethylene-propylene-ethylidene-norbornene, ethylene-propylene-cyclo At least one member selected from the group consisting of hexadiene and derivatives thereof Olefin thermoplastic resin composition. The method according to claim 4 or 5, The olefin copolymer rubber is characterized in that the pattern viscosity ML1 +4 is 20 to 100 at 125 ℃ Olefin thermoplastic resin composition. The method of claim 4, wherein The styrene copolymer is a copolymer elastomer of styrene and an aliphatic unsaturated hydrocarbon having 2 to 10 carbon atoms, characterized in that Olefin thermoplastic resin composition. The method of claim 7, wherein The styrene-based copolymer is a group consisting of styrene-butadiene-styrene copolymer elastomer, styrene-isoprene-styrene copolymer elastomer, styrene-ethylene-propylene-styrene copolymer elastomer, and styrene-ethylene-butylene-styrene copolymer elastomer It is at least one selected from Olefin thermoplastic resin composition. The method of claim 1, The inorganic filler is at least one member selected from the group consisting of talc, calcium carbonate, barium sulfate, aluminum hydroxide, titanium dioxide, zinc oxide, magnesium oxide, mica, wollastonite, silica, kaolin, clay, and carbon black. By Olefin thermoplastic resin composition. The method according to claim 1 or 9, The inorganic filler is characterized in that the average particle diameter is 0.1 to 15 ㎛ Olefin thermoplastic resin composition. The method of claim 1, The organic peroxide crosslinking agent is benzoyl peroxide, lauryl peroxide, dicumyl peroxide, 1,3-bis (t-butylperoxyisopropyl) benzene, di-t-butylperoxide, 2,5- Dimethyl-2,5-di (t-butylperoxyl) hexane, 2,5-dimethyl-2,5- (t-butylperoxyl) hexane, p-chlorobenzoyl peroxide, n-butyl-4,4- At least one member selected from the group consisting of bis (t-butylperoxy) valate and 2,4-dichlorobenzoyl peroxide Olefin thermoplastic resin composition. The method of claim 1, The crosslinking aid is one selected from the group consisting of divinylbenzene, ethylene glycol dimethacrylate, triallyl cyanurate, diethylene glycol dimethacrylate, allyl methacrylate, and trimethylolpropane trimethacrylate. It is ideal Olefin thermoplastic resin composition. The method of claim 1, The scratch resistant additives include siloxane, polyorganosiloxane, metal stearate, saturated fatty acid amide, unsaturated fatty acid amide, flake type inorganic filler, epoxy resin, maleic carboxylic acid, maleic carboxylic Anhydrides, α- or β-unsaturated carboxylic esters, α- or β-unsaturated carboxylic acids, α- or β-unsaturated carboxylic anhydrides, maleic alpha olefins with alcohol or amine functionality, and primary or secondary fatty acid amides At least one selected from the group consisting of Olefin thermoplastic resin composition. The method of claim 13, The scratch resistant additive may be a maleic alpha olefin having an alcohol or amine functional group, a primary or secondary fatty acid amide, or a mixture thereof. Olefin thermoplastic resin composition. The method of claim 1, Interior and exterior materials for cars, interior and exterior materials for building, characterized in that applied to electrical and electronic products Olefin thermoplastic resin composition.