KR100896210B1 - Weatherability acrylonitrile-ethylene propylene rubber-styrene(aes) resin with excellent anti-scratch characteristics and method for preparing the same - Google Patents

Abstract

According to the present invention, the reaction mixture solution in which styrene monomer, unsaturated nitrile monomer, methyl methacrylate monomer, ethylene propylene rubber and reaction solvent are dissolved is continuously added to the first, second and third reactors connected in series. Polymerization with; And discharging the product discharged from the third reactor into the devolatilization tank to separate unreacted material, adding a polymerization initiator and a molecular weight regulator into the first reactor, and adding a molecular weight regulator and a silicone oil to the third reactor. A method for preparing weather-resistant acrylonitrile-ethylene propylene rubber-styrene (AES) resin having excellent scratch characteristics, and a weather-resistant acrylonitrile-ethylene propylene rubber having excellent scratch resistance prepared by the above-described method. It relates to a styrene (AES) resin.

AES resin, methyl methacrylate monomer, continuous bulk polymerization, weather resistance, scratch resistance, ethylene propylene rubber

Description

Weatherability Acrylonitrile-Ethylene Propylene Rubber-Styrene (AES) Resin with Excellent Anti-Scratch Characteristics and Method for Preparing the Same}

Field of invention

The present invention relates to a weather resistant AES resin having excellent scratch resistance and a method of manufacturing the same. More specifically, the reaction mixture solution in which the unsaturated nitrile monomer, the styrene monomer, the ethylene propylene rubber and the methyl methacrylate monomer are dissolved in the reaction solvent is sequentially added to the reactor connected in series to polymerize, followed by polymerization. The present invention relates to a method for preparing a weather resistant AES resin having excellent scratch resistance by a continuous bulk polymerization method comprising the step of separating unreacted substances in and to a weather resistant AES resin having excellent scratch resistance by the manufacturing method.

Background of the Invention

In general, ABS resin is widely used in various applications such as automobiles, electronics, office equipment, home appliances, toys, stationery, etc., due to its physical strength and beautiful appearance such as styrene processability, acrylonitrile stiffness and chemical resistance, butadiene impact resistance, etc. Although it has the advantage of being used, the hydrogen of the methyl group adjacent to the double bond remaining in the butadiene component used in the ABS resin becomes the starting point of the oxidation reaction by the action of light or oxygen, and the main chain causes the reaction to degrade the weather resistance. In addition to generating whitening and cracks on the surface, it also causes various performances of the ABS resin. In order to compensate for such a disadvantage that the weather resistance is lowered, a method such as adding a UV stabilizer, plating, coating, etc. is used, but this method causes an increase in manufacturing cost and inherently has a limitation in improving weather resistance.

In order to improve the weather resistance of the ABS resin, butadiene components having a double bond in the molecule that causes weather resistance should be removed and replaced with a rubber having no unsaturated bond. One of the resins developed for this purpose is AES resins made using ethylene propylene rubber instead of butadiene rubber. Representative rubbers used to make AES resins include ethylene propylene rubber (EPR) and EPDM rubber, an ethylene propylene nonconjugated diene three-dimensional copolymer. Various methods have been invented and commercially used in the manufacturing method for improving weather resistance of ABS resin.

Representative methods are emulsion polymerization and continuous bulk polymerization. The manufacturing method of improving the weather resistance of ABS resin by emulsion polymerization method uses acrylate-styrene-acrylonitrile (ASA) polymer which does not have unsaturated bonds in place of the conventional butadiene polymer rubber used in the production of ABS resin. It is a way. In the case of using the ASA polymer, first, the ASA polymer is prepared by emulsion polymerization, and then mixed with a continuous styrene-acrylonitrile copolymer (SAN copolymer) in an appropriate ratio, followed by extrusion. In this case, the manufacturing cost increases due to the multi-stage polymerization step, and the emulsifier and the coagulant are not completely removed during the coagulation and dehydration process during emulsion polymerization for the ASA polymer production, and thus remain in the final product, causing deterioration of physical properties. It is more disadvantageous than the method by the continuous bulk polymerization method.

Another method is a method for producing AES resin by continuous bulk polymerization. A number of patents have been applied for the method of producing AES resin by the continuous bulk polymerization method.

In Korean Patent Publication No. 2007-43480, in the production of AES resin consisting of styrene monomer, acrylonitrile monomer, and ethylene proylene-based rubber, maleic anhydride monomer is added to provide heat resistance and impact resistance by continuous bulk polymerization. A method for producing excellent weather resistant AES is disclosed.

Korean Patent Laid-Open Publication No. 2006-86194 discloses a method for preparing a high gloss high impact AES resin having a bimodal particle size distribution of a mixed solution in which ethylene propylene-based rubber polymers and styrene-based and acrylonitrile-based monomers are dissolved in an organic solvent. It has excellent impact strength and glossiness through the pre-graft polymerization step of graft polymerization of a predetermined amount using a polymerization initiator and the present graft polymerization step of further graft polymerization by adding the remaining amount of the mixed solution to the pre-graft polymer. A method of making an AES resin is disclosed.

Korean Patent Laid-Open Publication No. 2005-51940 discloses a step of polymerizing styrene-based monomers and acrylonitrile-based monomers one or more times at a temperature of 90 ° C. or more and less than 130 ° C. to ethylene propylene rubber and styrene butadiene styrene rubber in a reaction solvent. Disclosed is a method for producing an AES resin having excellent impact resistance and weather resistance and excellent appearance quality of a molded article, including graft copolymerization by a continuous bulk polymerization method comprising polymerization at least once at a temperature of 160 ° C. or more and 160 ° C. or less. It was.

However, in the case of AES resin manufactured by the conventional method exemplified above, the weather resistance of the AES resin is excellent, but the scratch resistance of the injection molded article is degraded. It causes scratches in appearance and deteriorates the quality of the product, thereby degrading the value of the product and reducing the appearance quality of the product.

Therefore, in the present invention, in order to overcome the disadvantages of lowering the scratch resistance of the weather resistant acrylonitrile-ethylene propylene rubber-styrene (AES) resin as described above in the reaction solvent in the production of acrylonitrile-ethylene propylene rubber-styrene (AES) resin In addition to the unsaturated nitrile-based monomer, styrene-based monomer and ethylene propylene-based rubber in addition to the methyl methacrylate monomer in order to express the scratch resistance to excellent scratch resistance produced by the continuous bulk polymerization method Weather resistant AES resins have been developed.

An object of the present invention is to provide a weather resistant AES resin having excellent scratch resistance.

Another object of the present invention is to provide a method for producing weatherable AES resin having excellent physical property balance and scratch resistance.

The above object of the present invention can be achieved by the present invention described below.

Summary of the Invention

According to the present invention, the reaction mixture solution in which styrene monomer, unsaturated nitrile monomer, methyl methacrylate monomer, ethylene propylene rubber and reaction solvent are dissolved is continuously added to the first, second and third reactors connected in series. Polymerization with; And discharging the product discharged from the third reactor into the devolatilization tank to separate unreacted material, adding a polymerization initiator and a molecular weight regulator into the first reactor, and adding a molecular weight regulator and a silicone oil to the third reactor. The present invention relates to a method for producing a weather resistant acrylonitrile-ethylene propylene rubber-styrene (AES) resin having excellent scratch resistance characteristics.

The reaction mixture solution is 8 to 45 parts by weight of styrene monomer, 10 to 20 parts by weight of unsaturated nitrile monomer, 5 to 50 parts by weight of methyl methacrylate monomer, 5 to 13 parts by weight of ethylene propylene diene rubber and 10 to 30 reaction solvent. It consists of parts by weight.

Hereinafter, the content of the present invention will be described in detail below.

Detailed Description of the Invention

After dissolving an unsaturated nitrile monomer, styrene monomer, ethylene propylene rubber, and methyl methacrylate monomer in a reaction solvent, three reactors are continuously added to a series polymerization reactor connected in series, where a certain amount of polymerization initiator is added to the first reactor. And a molecular weight modifier is added, a predetermined amount of molecular weight modifier and silicone oil are introduced into the third reactor, and the polymerization reaction occurs while remaining in the reactor for a certain residence time, and then the unreacted substance is removed from the devolatilization tank and discharged continuously out of the reactor. Do it.

The reaction mixture solution is reacted in a first reactor to produce a first polymer having a content of 25 to 30% solids, and the first polymer is continuously introduced into a second reactor and polymerized to produce a first polymer having a solid content of 35 to 45%. 2, a polymer is produced, and the second polymer is continuously introduced into the third reactor and reacted to produce a third polymer having a solid content of 70 to 80%.

The residence time of each reactor in the three reactors used in the present invention is suitably 1 hour to 3 hours, the reaction temperature of the first reactor is 100 ~ 120 ℃, the reaction temperature of the second reactor is 110 ~ 140 ℃ The reaction temperature of the third reactor is preferably 130 to 170 ° C. If the residence time of each reactor is less than 1 hour, it is difficult to achieve the target conversion rate, and if it is more than 3 hours, it takes a lot of time to produce, and thus the commercial utility is inferior.

In order to maintain a certain level of conversion in each reactor it can be controlled by the reaction temperature in the reactor, the residence time and the type and content of the polymerization initiator added to the monomer mixture.

Styrene, alpha methyl styrene or a mixture thereof may be used as the styrene monomer. The content of the styrene monomer is preferably 8 to 45 parts by weight, more preferably 12 to 40 parts by weight.

Acrylonitrile, methacrylonitrile or mixtures thereof may be used as the unsaturated nitrile monomer. The content of the unsaturated nitrile monomer is preferably 10 to 20 parts by weight, more preferably 12 to 17 parts by weight.

In the case of the methyl methacrylate monomer introduced to express the scratch resistance, the content thereof is preferably 5 to 50 parts by weight, more preferably 10 to 45 parts by weight, most preferably 15 to 40 parts by weight. If the content of the methyl methacrylate monomer is used in less than 5 parts by weight of the scratch resistance is significantly reduced to obtain the product to be obtained in the present invention, if used in excess of 50 parts by weight of the polymer in each reactor Due to the increase in viscosity, the polymerization stability is lowered, resulting in unstable process operation.

The ethylene propylene rubber is added to improve weather resistance and impact characteristics, and may be selected from the group consisting of ethylene propylene rubber (EPR), ethylene propylene diene (EPDM), and mixtures thereof.

The content of the ethylene propylene rubber is preferably 5 to 13 parts by weight. If the content of the ethylene propylene-based rubber is used less than 5 parts by weight, the impact characteristics are lowered, and when used in excess of 13 parts by weight, it is difficult to control the formation of rubber particles due to the increase in the viscosity of the polymer in the reactor, and the graft reaction It causes a decrease in the appearance quality of the product ℃ decreases the scratch resistance problem. The ethylene propylene rubber may be added ethylene norbornene (ENB) as the diene monomer. In one embodiment of the present invention, the ethylene norbornene content is 0 to 10% by weight, the ethylene content is 40 to 80% by weight, and the propylene content is 15 to 50. It is weight% and the thing of 15-80 pattern viscosities (ML (1 + 4) @ 125 degreeC) is used.

The reaction solvent is added to lower the viscosity of the reaction solution in the reaction process, toluene, ethylbenzene, xylene, methyl ethyl ketone or a mixture thereof may be used, and toluene is preferable, and the content is 10 to 30 parts by weight. It is preferable. When the content of the reaction solvent is less than 10 parts by weight, the viscosity of the reaction solution becomes high, making it difficult to operate the process, and when it exceeds 30 parts by weight, the productivity of the product decreases, which leads to an increase in manufacturing cost. It is difficult to remove the unreacted material effectively, which increases the amount of unreacted material remaining in the final product, thereby degrading the quality of the final product.

The polymerization initiator uses an organic peroxide initiator, benzoyl peroxide, t-butyl peroxyisobutyrate, 1,1-bis (t-butylperoxy) cyclohexane (1, 1-Bis (t-butylperoxy) cyclohexane), 2,2-bis (4,4-di-t-butylperoxy cyclohexane) propane (2,2-Bis (4,4-di-t-butylperoxy cyclohexane) propane), t-Hexyl peroxy isopropyl monocarbonate, t-Butyl peroxylaurate, t-Butyl peroxy isopropyl monocarbonate t-Butyl peroxy 2-ethylhexyl monocarbonate, t-hexyl peroxybenzoate, t-Butyl peroxyacetate, t-Butyl peroxyacetate, 2,2-bis (t-butyl peroxy) butane (2,2-Bis (t-butyl peroxy) butane), t-butyl peroxybenzoate (t-Butyl peroxybenzoate), Dicumyl peroxide oxide), 2,5-dimethyl-2,5-bis (t-butyl peroxy) hexane (2,5-Dimethyl-2,5-bis (t-butyl peroxy) hexane), t-butyl cumyl peroxide ( t-Butyl cumyl peroxide, Di-t-butyl peroxide, Di-t-amyl peroxide, etc. may be used, but is not necessarily limited thereto. . The polymerization initiator is used in an amount of 0.02 to 0.15 parts by weight with respect to 100 parts by weight of the monomer, and preferably 0.05 to 0.12 parts by weight. When the amount of the polymerization initiator exceeds 0.15 parts by weight, it is difficult to effectively control the reaction temperature, residence time, etc. due to the rapid polymerization reaction, the molecular weight of the resulting product is lowered, the impact strength of the final product may be lowered. If the amount of the polymerization initiator is less than 0.02 parts by weight, the reaction rate is drastically lowered, making it difficult to achieve the target solids content, the graft reaction is remarkably lowered, and the formation of rubber particles becomes unstable, which lowers the appearance quality of the final product. You can.

The molecular weight regulator is added to adjust the viscosity of the resin and the size of the rubber particles can be selected from t-dodecyl mercaptan, n-octyl mercaptan. The content of the molecular weight regulator is preferably added to 0.02 to 0.5 parts by weight in the first reactor, and 0.02 to 0.5 parts by weight in the third reactor relative to 100 parts by weight of the monomer. It is possible to adjust the dosages to the first reactor and the third reactor within the above range in order to adjust the flowability and physical property balance of the resin. If the content of the molecular weight regulator in the first reactor is less than 0.02 parts by weight based on 100 parts by weight of the monomer, the process operation may become unstable due to the increase in the viscosity of the polymer, the size of the rubber particles may be very small, and the coagulation of the rubber particles may occur. There are disadvantages in that deterioration of properties and appearance properties are degraded. In addition, when the content of the molecular weight regulator added to the first reactor is more than 0.5 parts by weight, the size of the rubber particles is very large and the appearance physical properties are lowered. If the content of the molecular weight regulator in the third reactor is less than 0.02 parts by weight based on 100 parts by weight of the monomer, the operation of the process becomes unstable due to the increase in the viscosity of the polymer. .

The third reactor is continuously supplied with antioxidant, internal lubricant, and silicone oil. The silicone oil is preferably polydimethylsiloxane and has a viscosity of 10 to 10,000 cst, and is added at 0.01 to 0.5 parts by weight based on 100 parts by weight of the final product.

As described above, the weather resistant AES resin having excellent scratch resistance by the manufacturing method of the present invention has a scratch resistance of HB to 2H by a pencil hardness measurement method, and a 1/4 inch Notched Izod impact strength of 20 to 40 kgfcm / cm. , ASTM D4459 (2000hr, dE) under the conditions of weathering evaluation, characterized in that the dE change is 0.5 to 2.

The invention can be better understood by the following examples, which are intended for the purpose of illustration of the invention and are not intended to limit the scope of protection defined by the appended claims.

Examples and Comparative Examples

Example 1

Sequentially supplying a monomer mixture of 38 parts by weight of styrene monomer, 14 parts by weight of acrylonitrile monomer, 8 parts by weight of ethylene propylene diene (EPDM) and 20 parts by weight of methyl methacrylate monomer to 20 parts by weight of the reaction solvent toluene to the first reactor Simultaneously, 0.09 parts by weight of t-butyl peroxy 2-ethylhexyl monocarbonate, a polymerization initiator, was continuously added to the first reactor with respect to 100 parts by weight of monomer introduced into the first reactor. 0.1 parts by weight of a molecular weight regulator t-dodecyl mercaptan was continuously added to the first reactor, and reacted in a first reactor at a reaction temperature of 110 ° C., a stirrer at 145 RPM and a residence time of 1.2 hours to polymerize a solid content of 25 to 30 parts by weight. Then, it was continuously supplied to the second reactor and reacted for 120 hours at reaction temperature, 130 RPM with stirrer, and residence time for 2 hours. After the polymerization to 5 parts by weight, it is continuously fed to the third reactor. At this time, while continuously supplying the reaction polymer from the second reactor to the third reactor, 0.25 parts by weight of the molecular weight regulator t-dodecyl mercaptan is continuously added to the third reactor with respect to 100 parts by weight of the monomers supplied to the first reactor, the final product 0.1 parts by weight of silicone oil was continuously supplied to the third reactor with respect to 100 parts by weight, and the reaction temperature was 150 ° C., the stirrer was 100 RPM, the reaction time was carried out for 2 hours, and the polymerization was performed so that the solid content was 70 to 80 parts by weight. It is continuously fed to two devolatilization tanks connected with a reactor to remove unreacted material, and then to obtain a final product in pellet form. The melt index, impact strength, scratch resistance, weather resistance, and glossiness of the products thus produced were measured and shown in Table 1.

Example 2

The same procedure as in Example 1 was carried out except that 25 parts by weight of styrene monomer, 14 parts by weight of acrylonitrile monomer, 11 parts by weight of ethylene propylene diene (EPDM), and 30 parts by weight of methyl methacrylate monomer were used. It is shown in Table 1.

Example 3

Except for using 20 parts by weight of styrene monomer, 14 parts by weight of acrylonitrile monomer, 6 parts by weight of ethylene propylene diene (EPDM), 40 parts by weight of methyl methacrylate monomer was prepared in the same manner as in Example 1 and measured physical properties It is shown in Table 1.

Comparative Example 1

It was prepared in the same manner as in Example 1, except that 58 parts by weight of styrene monomer, 14 parts by weight of acrylonitrile monomer, and 8 parts by weight of ethylene propylene diene (EPDM) were used without adding methyl methacrylate monomer. It is shown in Table 1.

Comparative Example 2

Except for using 3 parts by weight of styrene monomer, 14 parts by weight of acrylonitrile monomer, 8 parts by weight of ethylene propylene diene (EPDM), 55 parts by weight of methyl methacrylate monomer was prepared in the same manner as in Example 1 and measured physical properties It is shown in Table 1.

Comparative Example 3

Except for using 42 parts by weight of styrene monomer, 14 parts by weight of acrylonitrile monomer, 4 parts by weight of ethylene propylene diene (EPDM), 20 parts by weight of methyl methacrylate monomer was prepared in the same manner as in Example 1 and measured physical properties It is shown in Table 1.

Comparative Example 4

It was prepared in the same manner as in Example 1 except that 31 parts by weight of styrene monomer, 14 parts by weight of acrylonitrile monomer, 15 parts by weight of ethylene propylene diene (EPDM), and 20 parts by weight of methyl methacrylate monomer were used. It is shown in Table 1.

Comparative Example 5

Except not adding the silicone oil to the third reactor was prepared in the same manner as in Example 1 and measured in the physical properties are shown in Table 1.

Property measurement method

(1) Melt index (220 ° C., 10 kg): measured by ASTM D1238.

(2) Izod impact strength (kgfcm / cm, 1/4 "Notched): measured by ASTM D256.

(3) Scratch resistance characteristics: After leaving for 48 hours at 23 ℃, 50% relative humidity, the pencil hardness was measured according to JIS K 5401 standard.

(4) Weather resistance measurement: It measured by ASTM D4459 (2000hr, dE).

(5) Gloss characteristics: measured by ASTM D-523.

TABLE 1

As shown in Examples 1 to 3 of Table 1, in the preparation of weather-resistant acrylonitrile-ethylenepropylene rubber-styrene (AES) resin having excellent scratch resistance, scratch resistance was expressed in 10 to 30 parts by weight of the reaction solvent. To this end, 5 to 50 parts by weight of a methyl methacrylate monomer was added, 5 to 13 parts by weight of ethylene propylene diene rubber, 8 to 45 parts by weight of styrene monomer, and 10 to 20 parts by weight of acrylonitrile monomer were added to continuously bulk polymerization. When the resin was produced by the resin was excellent in the balance of the physical properties, it was possible to obtain a resin excellent in both scratch resistance and weather resistance.

However, when the methyl methacrylate monomer is not added as shown in Comparative Example 1, the scratch resistance is significantly lowered to the level of 3B pencil hardness, and as shown in Comparative Example 2, the amount of the methyl methacrylate monomer added is 55 In the case of parts by weight, the viscosity of the polymer rapidly increased, and thus the process operation was impossible. When the amount of ethylene propylene diene-based (EPDM) is 4 parts by weight as shown in Comparative Example 3, the impact characteristics are lowered, and as shown in Comparative Example 4, the amount of ethylene propylene diene-based (EPDM) is 15 parts by weight. The gloss reduction and the scratch resistance were lowered, and as shown in Comparative Example 5, the impact characteristics were significantly lowered when the silicone oil was not added to the third reactor.

As a result of looking at the above Examples and Comparative Examples, it was confirmed that a resin having excellent physical properties and excellent scratch resistance and weather resistance can be obtained through the manufacturing method of the present invention.

The present invention has the effect of providing a weatherable AES resin excellent in the physical properties and scratch resistance properties and a method for producing the same.

Simple modifications or changes of the present invention can be easily carried out by those skilled in the art, and all such modifications or changes can be seen to be included in the scope of the present invention.

Claims (11)

The reaction mixture solution in which styrene monomer, unsaturated nitrile monomer, methyl methacrylate monomer, ethylene propylene rubber and reaction solvent are dissolved is continuously added to the first, second and third reactors connected in series to sequentially polymerize. ; And Injecting the product discharged from the third reactor into a devolatilization tank to separate unreacted materials; It is composed of the steps, the polymerization initiator and the molecular weight regulator is added to the first reactor, the molecular weight regulator and silicone oil is added to the third reactor, weather resistance acrylonitrile-ethylene propylene rubber having excellent scratch characteristics- Method for producing styrene (AES) resin. The method of claim 1, wherein the reaction mixture solution is reacted in a first reactor to produce a first polymer having a solid content of 25-30%; Continuously injecting and polymerizing the first polymer into a second reactor to produce a second polymer having a solid content of 35 to 45%; Weather-resistant acrylonitrile-ethylenepropylene rubber-styrene (AES) having excellent scratch resistance, characterized in that the second polymer is continuously introduced into the third reactor and reacted to produce a third polymer having a solid content of 70 to 80%. ) Resin preparation method. According to claim 2, wherein the reaction temperature of the first reactor is 100 ~ 120 ℃, the reaction temperature of the second reactor is 110 ~ 140 ℃, the reaction temperature of the third reactor is 130 ~ 170 ℃, each residence time is A method for producing a weather-resistant acrylonitrile-ethylenepropylene rubber-styrene (AES) resin having excellent scratch resistance, characterized in that 1 to 3 hours. According to claim 1, wherein the reaction mixture solution is 8 to 45 parts by weight of styrene monomer, 10 to 20 parts by weight of unsaturated nitrile monomer, 5 to 50 parts by weight of methyl methacrylate monomer, 5 to 13 parts by weight of ethylene propylene diene rubber And 10 to 30 parts by weight of a reaction solvent. A method for producing weather-resistant acrylonitrile-ethylenepropylene rubber-styrene (AES) resin having excellent scratch resistance. The method of claim 1, wherein the reaction solvent is toluene, ethyl benzene, xylene, methyl ethyl ketone or a mixture thereof, weather resistance acrylonitrile- ethylene propylene rubber-styrene (AES) resin having excellent scratch characteristics Manufacturing method. According to claim 1, wherein the ethylene propylene-based rubber is selected from the group consisting of ethylene-propylene rubber (EPR), ethylene-propylene-diene (EPDM) and mixtures thereof Weatherable acrylic having excellent scratch resistance characteristics Process for producing ronitrile-ethylenepropylene rubber-styrene (AES) resin. According to claim 1, The ethylene propylene rubber has an ethylene norbornene content of 0 to 10% by weight, ethylene content of 40 to 80% by weight, propylene content of 15 to 50 A method for producing a weather resistant acrylonitrile-ethylenepropylene rubber-styrene (AES) resin having excellent scratch resistance, characterized in that the weight percentage. The weathering acrylonitrile having excellent scratch resistance according to claim 1, wherein the polymerization initiator is an organic peroxide and is used in an amount of 0.02 to 0.15 parts by weight based on 100 parts by weight of the monomer in the reaction mixture solution introduced into the first reactor. -Method for producing ethylene propylene rubber-styrene (AES) resin. The method of claim 1, wherein the molecular weight regulator is selected from the group consisting of t-dodecyl mercaptan, n-octyl mercaptan, the content of the molecular weight regulator to be added to the first reactor and the third reactor is a monomer in a mixed solution A method for producing a weather resistant acrylonitrile-ethylene propylene rubber-styrene (AES) resin having excellent scratch resistance, characterized in that it is 0.02 to 0.5 parts by weight with respect to 100 parts by weight. The method of claim 1, wherein the silicone oil is used in an amount of 0.01 to 0.5 parts by weight based on 100 parts by weight of the final product. . It is prepared by the method of any one of claims 1 to 10, the scratch resistance by the pencil hardness measurement method is HB-2H, 1 / 4inch Notched Izod impact strength 20-40 kgfcm / cm, ASTM D4459 (2000hr, Weather resistance acrylonitrile- ethylene propylene rubber-styrene (AES) resin which is excellent in a scratch-resistant characteristic characterized by a dE change of 0.5-2 as a result of a weather resistance evaluation under dE) conditions.