Thermoplastic resin composition, method of preparing the same, and molded article including the same

Abstract

Provided is a thermoplastic resin composition including 30 to 50 wt % of a polybutylene terephthalate resin (A); 8 to 20 wt % of a polyethylene terephthalate resin (B); 3 to 15 wt % of an acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (C); 3 to 15 wt % of an aromatic vinyl compound-vinyl cyanide compound copolymer (D); 25 to 40 wt % of glass fiber (E); 0.15 to 1 wt % of a carbodiimide-based compound (F); 0.5 to 1.5 wt % of an epoxy compound (G); and 0.25 to 1.2 wt % of a hindered amine-based light stabilizer (H), a method of preparing the thermoplastic resin composition, and a molded article including the composition. The thermoplastic resin composition has excellent impact strength, tensile and flexural strength, and flexural modulus, and excellent heat resistance; has excellent flexural strength retention rate after the Air-HAST test; and satisfies product reliability required by automotive exterior materials and materials for electric/electronic parts.