Thermoplastic resin composition and article manufactured using same

Abstract

The present invention relates to a thermoplastic resin composition and to a molded article manufactured using same by means of a long fiber injection molding method, the thermoplastic resin composition comprising (A) 0.1-3 parts by weight of an oil having a triglyceride structure with respect to 100 parts by weight of a base resin that comprises (B) 15-40 wt% of a butadiene-based rubber-modified aromatic vinyl-cyanide vinyl graft copolymer and (C) 60-85 wt% of an aromatic vinyl-cyanide vinyl copolymer.

Description

Thermoplastic resin composition and molded article manufactured therefrom

[0001] The present invention relates to a thermoplastic resin composition and a molded article manufactured therefrom, and more particularly, to a thermoplastic resin composition used in molding using a long fiber injection molding (LFI) method and a molded article manufactured by molding the composition using the LFI method.

[0002] Styrenic resins, represented by acrylonitrile-butadiene-styrene copolymer (ABS) resin, are widely used in various applications due to their excellent formability, mechanical properties, appearance, and secondary processability.

[0003] Molded products manufactured using styrene resins can be widely applied to various products requiring painting / unpainting, such as interior / exterior materials for automobiles and electronic devices.

[0004] In particular, in line with the trend of lightweighting automobiles, a technology is being noted that manufactures extruded sheets using ABS resin and molds them using the LFI method to increase the rigidity of the molded product, thereby replacing the steel plates used in automobile exterior parts such as hoods.

[0005] However, when applying the above technology, in most cases, the remaining amount or some pieces of the extruded sheet left over after manufacturing the molded product are recycled and used as raw materials for manufacturing the extruded sheet again. However, during this process, during the repetitive high-temperature extrusion sheet molding process, some of the double bonds of the butadiene rubber in the ABS resin are broken and cross-linked with each other, so that they do not melt and disperse properly during the extruded sheet molding process and remain as foreign substances on the surface of the extruded sheet, which can cause appearance defects. In the past, in order to prevent the cross-linking of the butadiene rubber, inorganic substances such as magnesium oxide (MgO) were added. However, in this case, pinholes due to inorganic substances such as magnesium oxide were formed on the surface of the molded product, making it difficult to achieve a high appearance.

[0006] Accordingly, there is a need for a thermoplastic resin composition that maintains excellent physical properties, appearance characteristics, and moldability even after going through multiple molding processes without using inorganic substances such as magnesium oxide.

[0007] The present invention provides a thermoplastic resin composition useful for molding using the LFI method, which has excellent heat resistance, fluidity and impact resistance, and shows little change in appearance and physical properties even after multiple molding processes, and a molded article manufactured therefrom.

[0008] According to one embodiment, a thermoplastic resin composition is provided, which comprises 100 parts by weight of a base resin comprising 15 to 40 parts by weight of (A) a butadiene-based rubber-modified aromatic vinyl-vinyl cyanide graft copolymer and 60 to 85 parts by weight of (B) an aromatic vinyl-vinyl cyanide copolymer, and 0.1 to 3 parts by weight of (C) an oil comprising a triglyceride structure.

[0009] The above (A) butadiene-based rubber-modified aromatic vinyl-vinyl cyanide graft copolymer may have a core-shell structure including a core made of a butadiene-based rubber polymer, and a shell formed by graft polymerization of an aromatic vinyl compound and a vinyl cyanide compound onto the core.

[0010] The above butadiene-based rubber polymer may have an average particle diameter of 0.2 to 1.0 ㎛.

[0011] With respect to 100 wt% of the above butadiene-based rubber-modified aromatic vinyl-cyanide vinyl graft copolymer, the butadiene-based rubber polymer may be included in an amount of 40 to 70 wt%.

[0012] The above (A) butadiene-based rubber-modified aromatic vinyl-cyanide vinyl graft copolymer may be an acrylonitrile-butadiene-styrene graft copolymer.

[0013] The above (B) aromatic vinyl-vinyl cyanide copolymer may have a weight average molecular weight of 70,000 to 300,000 g / mol.

[0014] The above (B) aromatic vinyl-vinyl cyanide copolymer may contain 55 to 80 wt% of an aromatic vinyl compound-derived component and 20 to 45 wt% of a vinyl cyanide compound-derived component based on 100 wt%.

[0015] The above (B) aromatic vinyl-vinyl cyanide copolymer may be a styrene-acrylonitrile copolymer.

[0016] The oil comprising the above (C) triglyceride structure may comprise a structure represented by the following chemical formula 1:

[0017] [Chemical Formula 1]

[0018]

[0019] In the above chemical formula 1, R1, R2, and R3 may be the same or different from each other, and R1, R2, and R3 are each a C4 to C30 aliphatic hydrocarbon group that is saturated or unsaturated, and any carbon in the aliphatic hydrocarbon group may be substituted with a hydroxy group.

[0020] In the above chemical formula 1, R1, R2, and R3 may each be a C12 to C20 aliphatic hydrocarbon group that is saturated or unsaturated.

[0021] The oil comprising the above (C) triglyceride structure may comprise a structure represented by the following chemical formula 2:

[0022] [Chemical Formula 2]

[0023]

[0024] The oil comprising the above (C) triglyceride structure may be a natural oil.

[0025] The oil comprising the above (C) triglyceride structure may be at least one of castor oil, palm oil, soybean oil, canola oil, corn oil, rapeseed oil, sunflower oil, grapeseed oil, safflower oil, cottonseed oil, sesame oil, rice bran oil, palm kernel oil, camellia oil, olive oil, coconut oil, beef tallow, lard, safflower oil, fish oil, whale oil, tuna oil, and waste oils thereof.

[0026] The thermoplastic resin composition may further include at least one additive selected from among a nucleating agent, a coupling agent, a filler, a plasticizer, a lubricant, a release agent, an antibacterial agent, a heat stabilizer, an antioxidant, an ultraviolet stabilizer, a flame retardant, a colorant, and an impact modifier.

[0027] Meanwhile, according to another embodiment, a molded product manufactured by molding the aforementioned thermoplastic resin composition using a long fiber injection molding (LFI) method is provided.

[0028] A thermoplastic resin composition according to one embodiment has excellent heat resistance, fluidity and impact resistance, and shows little change in appearance and physical properties even after multiple molding processes, making it particularly useful for manufacturing molded products using the LFI method.

[0029] Figure 1 shows the evaluation criteria for the appearance of the extruded sheet after re-extrusion in the experimental example of the present invention.

[0030] Figure 2 shows the evaluation criteria for the vacuum formability of the extruded sheet after re-extrusion in the experimental example of the present invention.

[0031] Hereinafter, embodiments of the present invention will be described in detail. However, these are presented as examples and are not intended to limit the present invention, which is defined solely by the appended claims.

[0032] Unless specifically stated herein, “copolymerization” means block copolymerization, random copolymerization, and graft copolymerization, and “copolymer” means block copolymer, random copolymer, and graft copolymer.

[0033] Unless otherwise specified herein, the average particle size of a rubber polymer is a volume average diameter and refers to the Z-average particle size measured using a dynamic light scattering analyzer.

[0034] Unless otherwise specified herein, the weight average molecular weight is measured by dissolving a powder sample in an appropriate solvent and using Agilent Technologies' 1200 series Gel Permeation Chromatography (GPC) (Shodex polystyrene is used as the standard sample).

[0035] According to one embodiment, the thermoplastic resin composition of the present invention comprises (C) 0.1 to 3 parts by weight of an oil comprising a triglyceride structure, relative to 100 parts by weight of a base resin comprising (A) 15 to 40 parts by weight of a butadiene-based rubber-modified aromatic vinyl-vinyl cyanide graft copolymer and (B) 60 to 85 parts by weight of an aromatic vinyl-vinyl cyanide copolymer.

[0036] Hereinafter, each component included in the thermoplastic resin composition will be described in detail.

[0037] (A) Butadiene-based rubber-modified aromatic vinyl-cyanide vinyl graft copolymer

[0038] In one embodiment, the butadiene-based rubber-modified aromatic vinyl-vinyl cyanide graft copolymer imparts excellent impact resistance to a thermoplastic resin composition. In one embodiment, the butadiene-based rubber-modified aromatic vinyl-vinyl cyanide graft copolymer may have a core-shell structure in which a core is formed of a butadiene-based rubber polymer component and a shell is formed by graft polymerization of an aromatic vinyl compound and a vinyl cyanide compound in the core.

[0039] According to one embodiment, the butadiene-based rubber-modified aromatic vinyl-vinyl cyanide graft copolymer can be manufactured by adding an aromatic vinyl compound and a vinyl cyanide compound to a butadiene-based rubber polymer and performing graft polymerization through a conventional polymerization method such as emulsion polymerization or bulk polymerization.

[0040] The above butadiene-based rubber polymer may be selected from the group consisting of butadiene rubber polymer, butadiene-styrene rubber polymer, butadiene-acrylonitrile rubber polymer, butadiene-acrylate rubber polymer, and mixtures thereof.

[0041] The above aromatic vinyl compound may be selected from the group consisting of styrene, α-methylstyrene, p-methylstyrene, pt-butylstyrene, 2,4-dimethylstyrene, chlorostyrene, vinyltoluene, vinylnaphthalene, and mixtures thereof.

[0042] The above vinyl cyanide compound may be selected from the group consisting of acrylonitrile, methacrylonitrile, fumaronitrile and mixtures thereof.

[0043] The butadiene-based rubber polymer of the above-mentioned butadiene-based rubber-modified aromatic vinyl-cyanide vinyl graft copolymer may have an average particle diameter of, for example, 0.2 to 1.0 ㎛, for example, 0.2 to 0.8 ㎛, for example, 0.25 to 0.50 ㎛. When the above range is satisfied, the thermoplastic resin composition can exhibit excellent impact resistance and appearance properties.

[0044] With respect to 100 wt% of the above butadiene-based rubber-modified aromatic vinyl-vinyl cyanide graft copolymer, the butadiene-based rubber polymer may be included in an amount of 40 to 70 wt%, for example, 40 to 60 wt%, for example, 45 to 60 wt%. Meanwhile, the weight ratio of the aromatic vinyl compound and the vinyl cyanide compound graft-polymerized into the central portion of the butadiene-based rubber polymer component may be 6:4 to 8:2.

[0045] In one embodiment, the butadiene-based rubber-modified aromatic vinyl-cyanide vinyl graft copolymer may be an acrylonitrile-butadiene-styrene graft copolymer.

[0046] The butadiene-based rubber-modified aromatic vinyl-cyanide vinyl graft copolymer may be present in an amount of 15 to 40 wt%, for example, 15 wt% or more, 20 wt% or more, 25 wt% or more, 30 wt% or more, or 35 wt% or more, and 40 wt% or less, 35 wt% or less, 30 wt% or less, 25 wt% or less, or 20 wt% or less, based on 100 wt% of the base resin. Within the above wt% range, the thermoplastic resin composition can have excellent impact resistance and a balance of overall physical properties.

[0047] (B) Aromatic vinyl-vinyl cyanide copolymer

[0048] In one embodiment, the aromatic vinyl-vinyl cyanide copolymer can improve the overall physical properties of the thermoplastic resin composition.

[0049] In one embodiment, the aromatic vinyl-vinyl cyanide copolymer has a weight average molecular weight of at least 70,000 g / mol, for example at least 80,000 g / mol, for example at least 100,000 g / mol, and may be at most 300,000 g / mol, for example at most 200,000 g / mol, for example from 70,000 to 300,000 g / mol, for example from 80,000 to 200,000 g / mol.

[0050] In one embodiment, the aromatic vinyl-vinyl cyanide copolymer can be prepared by polymerizing an aromatic vinyl compound and a vinyl cyanide compound using a conventional polymerization method such as emulsion polymerization, suspension polymerization, solution polymerization, or bulk polymerization.

[0051] The above aromatic vinyl compound may be selected from the group consisting of styrene, α-methylstyrene, p-methylstyrene, pt-butylstyrene, 2,4-dimethylstyrene, chlorostyrene, vinyltoluene, vinylnaphthalene, and mixtures thereof.

[0052] The above vinyl cyanide compound may be selected from the group consisting of acrylonitrile, methacrylonitrile, fumaronitrile and mixtures thereof.

[0053] The above aromatic vinyl-vinyl cyanide copolymer may contain 55 wt% or more, for example 60 wt% or more, for example 65 wt% or more, of the aromatic vinyl compound-derived component based on 100 wt%, and may contain 80 wt% or less, for example 75 wt% or less, and may contain 55 to 80 wt%, for example 60 to 75 wt%, of the aromatic vinyl compound-derived component based on 100 wt%.

[0054] In addition, the aromatic vinyl-vinyl cyanide copolymer may contain, for example, 20 wt% or more, for example, 25 wt% or more, of the vinyl cyanide compound-derived component based on 100 wt%, and may contain, for example, 45 wt% or less, for example, 40 wt% or less, and may contain, for example, 20 to 45 wt%, for example, 25 to 40 wt%.

[0055] In one embodiment, the aromatic vinyl-vinyl cyanide copolymer can be a styrene-acrylonitrile copolymer (SAN).

[0056] In one embodiment, the aromatic vinyl-vinyl cyanide copolymer may be included in an amount of 60 to 85 wt%, for example, 60 wt% or more, 65 wt% or more, 70 wt% or more, 75 wt% or more, or 80 wt% or more, and 85 wt% or less, 80 wt% or less, 75 wt% or less, 70 wt% or less, or 65 wt% or less, based on 100 wt% of the base resin. Within the above wt% range, the compatibility of the components within the thermoplastic resin composition may be excellent.

[0057] (C) Oil containing triglyceride structure

[0058] In one embodiment, the oil comprising a triglyceride structure can impart excellent moldability to the thermoplastic resin composition.

[0059] The present invention has the effect of providing an excellent extrusion sheet appearance and vacuum formability even after going through multiple molding processes without using inorganic substances such as magnesium oxide by including an oil containing the triglyceride structure in the composition.

[0060] In one embodiment, the oil comprising the triglyceride structure may comprise a structure represented by the following chemical formula 1:

[0061] [Chemical Formula 1]

[0062]

[0063] In the above chemical formula 1, R1, R2, and R3 may be the same or different from each other, and R1, R2, and R3 are each a C4 to C30 aliphatic hydrocarbon group that is saturated or unsaturated, and any carbon in the aliphatic hydrocarbon group may be substituted with a general substituent such as a hydroxy group.

[0064] In one embodiment, in the above chemical formula 1, R1, R2, and R3 may each be a C12 to C20 aliphatic hydrocarbon group that is saturated or unsaturated.

[0065] In one embodiment, the oil comprising the triglyceride structure may comprise a structure represented by the following chemical formula 2:

[0066] [Chemical Formula 2]

[0067]

[0068] The oil containing the above triglyceride structure may be a natural oil or a synthetic oil.

[0069] In one embodiment, the oil comprising the triglyceride structure may be a natural oil.

[0070] In one embodiment, the natural oil may be a vegetable oil or an animal oil.

[0071] In one embodiment, the oil comprising the triglyceride structure may be at least one of castor oil, palm oil, soybean oil, canola oil, corn oil, rapeseed oil, sunflower oil, grapeseed oil, safflower oil, cottonseed oil, sesame oil, rice bran oil, palm kernel oil, camellia oil, olive oil, coconut oil, beef tallow, lard, safflower oil, fish oil, whale oil, tuna oil, and waste oils thereof.

[0072] In one embodiment, the oil comprising the (C) triglyceride structure may be castor oil.

[0073] The oil containing the above (C) triglyceride structure may be included in an amount of 0.1 to 3 parts by weight, for example, 0.1 parts by weight or more, 0.3 parts by weight or more, 0.5 parts by weight or more, 1 parts by weight or more, 1.5 parts by weight or more, 2 parts by weight or more, or 2.5 parts by weight or more, and 3 parts by weight or less, 2.5 parts by weight or less, 2 parts by weight or less, 1.5 parts by weight or less, 1 part by weight or less, or 0.5 parts by weight or less, based on 100 parts by weight of the base resin containing the above components (A) and (B). In the above range of parts by weight, the moldability of a thermoplastic resin composition containing it may be further improved.

[0074] (D) Additives

[0075] A thermoplastic resin composition according to one embodiment may further include, in addition to the components (A) to (C), one or more additives necessary to balance the properties under conditions of maintaining excellent physical property balance, or depending on the final use of the thermoplastic resin composition.

[0076] Specifically, as the additives, nucleating agents, coupling agents, fillers, plasticizers, lubricants, release agents, antibacterial agents, heat stabilizers, antioxidants, ultraviolet stabilizers, flame retardants, colorants, impact modifiers, etc. can be used, and these can be used alone or in combination of two or more.

[0077] These additives may be appropriately included within a range that does not impair the physical properties of the thermoplastic resin composition, and may be included, for example, in an amount of 20 parts by weight or less per 100 parts by weight of the base resin, but are not limited thereto.

[0078] The thermoplastic resin composition according to the present invention can be manufactured by a known method for manufacturing a thermoplastic resin composition.

[0079] For example, the thermoplastic resin composition according to the present invention can be manufactured in the form of pellets by mixing the components of the present invention and other additives and then melt-kneading them in an extruder.

[0080] A molded article according to one embodiment of the present invention can be manufactured through a molding method using a long fiber injection molding (LFI) method from the thermoplastic resin composition described above.

[0081] In one embodiment, a molded product is provided by extruding a thermoplastic resin composition in pellet form as a raw material through a sheet extruder, or by vacuum-forming a co-extruded sheet co-extruded with another resin composition through a sheet extruder, and then manufacturing the same using an LFI method.

[0082] The LFI method is a method of forming a molded product having the shape of a desired part by vacuum forming an extruded sheet or a co-extruded sheet, and then spraying a mixture of polyurethane resin and glass fiber on the opposite side (or inside) of the molded product where the exterior is not exposed to provide rigidity. Since the thermoplastic resin composition, which is the raw material for manufacturing the extruded sheet or co-extruded sheet, is repeatedly reused, the thermoplastic resin composition must have little change in appearance and physical properties even after going through multiple molding processes to be able to be formed using the LFI method. As described above, the thermoplastic resin composition of the present invention has little change in appearance and physical properties even after going through multiple molding processes, and thus is able to be formed using the LFI method.

[0083] Hereinafter, the present invention will be described in more detail through examples and comparative examples. However, the following examples and comparative examples are for the purpose of explanation and are not intended to limit the present invention.

[0084] Examples 1 to 3 and Comparative Examples 1 and 2

[0085] The thermoplastic resin compositions of Examples 1 to 3 and Comparative Examples 1 and 2 were prepared according to the component content ratios described in Table 1 below.

[0086] In Table 1, (A) and (B) are included in the base resin and are expressed in weight % based on the total weight of the base resin, and (C) and (C') are added to the base resin and are expressed in weight parts based on 100 weight parts of the base resin.

[0087] The components listed in Table 1 were dry mixed and quantitatively and continuously fed into the feed section of a twin-screw extruder (L / D=44, Φ=45 mm) to melt / knead. Subsequently, the thermoplastic resin composition pellets manufactured through the extruder were dried at about 80°C for about 4 hours, and then a 6 oz. injection molding machine was used to manufacture specimens for measuring impact resistance and heat resistance by setting the cylinder temperature to about 230°C and the mold temperature to about 60°C.

[0088] Meanwhile, for evaluation of extrusion appearance and vacuum formability, dried thermoplastic resin composition pellets were manufactured into sheets having a width of about 300 mm and a thickness of about 2 mm using a single-screw extruder equipped with a T-die at a barrel temperature of about 230°C.

[0089] Example Comparative Example 12312(A)2515402525(B)7585607575(C)10.13--(C')----0.1

[0090] The description of each component listed in Table 1 above is as follows.

[0091] (A) Butadiene-based rubber-modified aromatic vinyl-cyanide vinyl graft copolymer

[0092] An acrylonitrile-butadiene-styrene graft copolymer (Lotte Chemical Co.) was used, which includes a core (average particle size: about 0.25 ㎛) made of a butadiene rubber polymer at about 58 wt% and a shell formed by graft polymerization of acrylonitrile and styrene (acrylonitrile: styrene weight ratio = about 2.5: about 7.5) onto the core.

[0093] (B) Aromatic vinyl-vinyl cyanide copolymer

[0094] A styrene-acrylonitrile copolymer (Lotte Chemical Co., Ltd.) having a weight average molecular weight of about 120,000 g / mol copolymerized from a monomer mixture containing about 32 wt% of acrylonitrile and about 68 wt% of styrene was used.

[0095] (C) Oil containing triglyceride structure

[0096] Castor oil (Lotte Welfood Co.) was used.

[0097] (C') magnesium oxide

[0098] YH150 (Hebei Meishen Technology) was used.

[0099] Experimental example

[0100] The experimental results are shown in Table 2 below.

[0101] (1) Fluidity (unit: g / 10min)

[0102] The melt flow index (MI) of pellet-shaped samples was measured under conditions of 220°C and 10 kg according to ISO 1133. The melt flow index was also measured under the same conditions for thermoplastic resin composition pellets manufactured through a twin-screw extruder and re-extruded by feeding them back into the twin-screw extruder.

[0103] (2) Impact resistance (unit: kgf·cm / cm)

[0104] Notched Izod impact strength was measured for 1 / 4" thick injection-molded specimens according to ASTM D256. Notched Izod impact strength was also measured for injection-molded specimens manufactured using thermoplastic resin composition pellets manufactured through a twin-screw extruder and re-extruded by feeding the pellets back into the twin-screw extruder under the same conditions.

[0105] (3) Heat resistance

[0106] The Vicat softening temperature (VST) of 1 / 4” thick injection molded specimens was measured under B / 50 conditions according to ISO 306.

[0107] (4) Appearance of extruded sheet after re-extrusion

[0108] The thermoplastic resin composition pellets manufactured through a twin-screw extruder were fed back into the twin-screw extruder and re-extruded to produce an extruded sheet using a single-screw extruder equipped with a T-die, and these were cut into a size of 300 mm x 300 mm x 2 mm to produce a gloss measurement specimen. The gloss of five random surfaces in the center of the gloss measurement specimen was measured at an angle of 60° using a gloss meter (Micro-gloss glossmeter, BYK Instruments), and the average value was calculated. The extrusion appearance evaluation criteria are shown in Fig. 1, and the extrusion appearance was marked with ○ when the gloss measurement value was 80 GU or higher and showed excellent gloss, and the extrusion appearance was marked with × when the gloss measurement value was less than 80 GU.

[0109] (5) Vacuum formability after re-extrusion

[0110] The thermoplastic resin composition pellets manufactured through a twin-screw extruder were fed back into the twin-screw extruder and re-extruded to produce an extruded sheet using a single-screw extruder equipped with a T-die, and these were cut into a size of 300 mm x 300 mm x 2 mm to manufacture a specimen for evaluating vacuum formability. The specimen for evaluating vacuum formability was heated with a non-contact 400℃ hot plate for 30 seconds, placed in a vacuum forming mold, and vacuumed at a pressure of 2 kPa for 12 seconds, and then cooled to room temperature for 6 seconds to evaluate vacuum formability. The evaluation criteria for vacuum formability are shown in Fig. 2. If the blown size from the bottom was 15 cm or more and vacuum forming was performed well, vacuum formability was marked as ○. If the blown size was less than 15 cm or ruptured during vacuum forming, vacuum formability was marked as ×.

[0111] Example Comparative Example 12312 Initial Melt Flow Index 4.5 5.0 4.0 4.0 Melt Flow Index after Re-Extrusion 4.5 5.0 4.0 3.0 4.0 Initial Izod Impact Strength 121113 1212 Izod Impact Strength after Re-Extrusion 121113 611 VST 117 117 116 117 117 Appearance of Extruded Sheet after Re-Extrusion ○○○×× Vacuum Formability after Re-Extrusion ○○○×○

[0112] As can be seen from Tables 1 and 2 above, the thermoplastic resin compositions of Examples 1 to 3 did not show any deterioration in physical properties after re-extrusion, and both the appearance of the extruded sheet and the vacuum formability after re-extrusion were good. On the other hand, the thermoplastic resin composition of Comparative Example 1, which did not use an oil containing a triglyceride structure, showed deterioration in physical properties after re-extrusion, and both the appearance of the extruded sheet and the vacuum formability after re-extrusion were poor. In addition, the thermoplastic resin composition of Comparative Example 2, which used magnesium oxide, showed good physical properties and vacuum formability after re-extrusion, but the appearance of the extruded sheet after re-extrusion was poor.

[0113] Although the present invention has been described above through preferred embodiments as described above, the present invention is not limited thereto, and those engaged in the technical field to which the present invention pertains will readily understand that various modifications and variations are possible without departing from the concept and scope of the patent claims described below.

Claims

1. A thermoplastic resin composition comprising 100 parts by weight of a base resin comprising 15 to 40 wt% of (A) a butadiene-based rubber-modified aromatic vinyl-vinyl cyanide graft copolymer and 60 to 85 wt% of (B) an aromatic vinyl-vinyl cyanide copolymer, and (C) 0.1 to 3 wt% of an oil comprising a triglyceride structure.

2. In paragraph 1, The above (A) butadiene-based rubber-modified aromatic vinyl-vinyl cyanide graft copolymer is a thermoplastic resin composition having a core-shell structure including a core made of a butadiene-based rubber polymer, and a shell formed by graft polymerization of an aromatic vinyl compound and a vinyl cyanide compound onto the core.

3. In paragraph 2, A thermoplastic resin composition wherein the above butadiene-based rubber polymer has an average particle diameter of 0.2 to 1.0 ㎛.

4. In either paragraph 2 or paragraph 3, A thermoplastic resin composition comprising 40 to 70 wt% of the butadiene-based rubber polymer relative to 100 wt% of the above (A) butadiene-based rubber-modified aromatic vinyl-cyanide vinyl graft copolymer.

5. In any one of paragraphs 1 to 4, A thermoplastic resin composition, wherein the above (A) butadiene-based rubber-modified aromatic vinyl-cyanide vinyl graft copolymer is an acrylonitrile-butadiene-styrene graft copolymer.

6. In any one of paragraphs 1 to 5, A thermoplastic resin composition wherein the above (B) aromatic vinyl-vinyl cyanide copolymer has a weight average molecular weight of 70,000 to 300,000 g / mol.

7. In any one of paragraphs 1 to 6, A thermoplastic resin composition, wherein the above (B) aromatic vinyl-vinyl cyanide copolymer comprises 55 to 80 wt% of an aromatic vinyl compound-derived component and 20 to 45 wt% of a vinyl cyanide compound-derived component based on 100 wt%.

8. In any one of paragraphs 1 to 7, A thermoplastic resin composition wherein the above (B) aromatic vinyl-vinyl cyanide copolymer is a styrene-acrylonitrile copolymer.

9. In any one of paragraphs 1 to 8, A thermoplastic resin composition, wherein the oil comprising the above (C) triglyceride structure comprises a structure represented by the following chemical formula 1. [Chemical Formula 1] In the above chemical formula 1, R1, R2, and R3 are the same as or different from each other, and R1, R2, and R3 are each a C4 to C30 aliphatic hydrocarbon group that is saturated or unsaturated, and at least one carbon atom of the aliphatic hydrocarbon group may be optionally substituted with a hydroxy group.

10. In paragraph 9, A thermoplastic resin composition, wherein R1, R2, and R3 in the above chemical formula 1 are each a saturated or unsaturated C12 to C20 aliphatic hydrocarbon groups.

11. In either of paragraphs 9 or 10, A thermoplastic resin composition, wherein the oil comprising the above (C) triglyceride structure comprises a structure represented by the following chemical formula 2. [Chemical Formula 2] 12. In any one of paragraphs 1 to 11, A thermoplastic resin composition, wherein the oil containing the above (C) triglyceride structure is a natural oil.

13. In any one of paragraphs 1 to 12, A thermoplastic resin composition, wherein the oil comprising the above (C) triglyceride structure is at least one of castor oil, palm oil, soybean oil, canola oil, corn oil, rapeseed oil, sunflower oil, grapeseed oil, safflower oil, cottonseed oil, sesame oil, rice bran oil, palm kernel oil, camellia oil, olive oil, coconut oil, beef tallow, lard, safflower oil, fish oil, whale oil, tuna oil, and waste oils thereof.

14. In any one of paragraphs 1 to 13, A thermoplastic resin composition further comprising at least one additive selected from among a nucleating agent, a coupling agent, a filler, a plasticizer, a lubricant, a release agent, an antibacterial agent, a heat stabilizer, an antioxidant, an ultraviolet stabilizer, a flame retardant, a colorant, and an impact modifier.

15. A molded product manufactured by molding a thermoplastic resin composition according to any one of claims 1 to 14 using a long fiber injection molding method.

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