Thermoplastic resin composition and molded article using the same

1. A thermoplastic resin composition comprising

(A) a graft copolymer;

(B) a polyalkyl (meth)acrylate;

(C) an alkyl (meth)acrylate-aromatic vinyl-vinyl cyanide copolymer; and

(D) an impact-reinforcing agent,

wherein the graft copolymer (A) comprises an aromatic vinyl compound-vinyl cyanide compound copolymer grafted on a core part comprising a rubbery polymer, wherein the graft copolymer (A) comprises 40 to 70 wt% of the core part and 30 to 60 wt% of the grafted aromatic vinyl compound-vinyl cyanide compound copolymer, and wherein the impact-reinforcing agent is an alkyl (meth)acrylate-butadiene-styrene (MBS) based copolymer.

2. The thermoplastic resin composition of claim 1 , wherein the aromatic vinyl compound-vinyl cyanide compound copolymer comprises 60 to 80 wt % of an aromatic vinyl compound and 20 to 40 wt % of a vinyl cyanide compound.

3. The thermoplastic resin composition of claim 1 , wherein the graft copolymer comprises a rubbery polymer of double structure core layers comprising an internal core layer comprising an alkyl acrylate-aromatic vinyl copolymer and an external core layer comprising an alkyl acrylate-based polymer; and an aromatic vinyl compound-vinyl cyanide compound copolymer grafted into the rubbery polymer of double structure core layers.

4. The thermoplastic resin composition of claim 3 , wherein the alkyl acrylate-aromatic vinyl copolymer comprises 20 to 80 wt % of an alkyl acrylate compound and 80 to 20 wt % of an aromatic vinyl compound.

5. The thermoplastic resin composition of claim 3 , wherein the rubbery polymer of the double structure core layer comprises 10 to 50 wt % of an internal core layer and 90 to 50 wt % of an external core layer.

6. The thermoplastic resin composition of claim 3 , wherein the alkyl acrylate is butyl acrylate.

7. The thermoplastic resin composition of claim 1 , comprising:

(A) 5 to 50 wt % of the graft copolymer;

(B) 10 to 80 wt % of the polyalkyl (meth)acrylate;

(C) 20 to 50 wt % of the alkyl (meth)acrylate-aromatic vinyl-vinyl cyanide copolymer; and

(D) 5 to 15 wt % of the impact-reinforcing agent.

8. The thermoplastic resin composition of claim 1 , wherein the polyalkyl (meth)acrylate (B) and the alkyl (meth)acrylate-aromatic vinyl-vinyl cyanide copolymer (C) are comprised in a weight ratio of 1:1 to 3:1.

9. The thermoplastic resin composition of claim 1 , wherein the alkyl (meth)acrylate-aromatic vinyl-vinyl cyanide copolymer (C) is a methyl(meth)acrylate-styrene-acrylonitrile copolymer.

10. The thermoplastic resin composition of claim 1 , wherein the thermoplastic resin composition further comprises an additive comprising a dye, a pigment, a flame retardant, a filler, a stabilizer, a lubricant, an antibacterial agent, a release agent or a combination thereof.

11. A molded article manufactured using the thermoplastic resin composition of claim 1 .