Polycarbonate-based resin composition and molded article thereof

A polycarbonate-based resin composition comprising:

• a polycarbonate resin including an aromatic polycarbonate-based first repeating unit,
• a copolycarbonate resin including an aromatic polycarbonate-based first repeating unit, and an aromatic polycarbonate-based second repeating unit having one or more siloxane bonds,
• a glass fiber,
• an impact-reinforcing agent including a rubber-modified vinyl-based graft copolymer, and
• a phosphorus-based flame retardant;
• wherein the first repeating unit each independently includes a repeating unit represented by Chemical Formula 1 below,
• the second repeating unit includes at least one repeating unit selected from the group consisting of Chemical Formula 3 below, and;
• the glass fiber has a rectangular, circular or elliptical cross section in a direction perpendicular to a longitudinal direction, and has an aspect ratio according to Equation 1 below of 100 to 500, a length (L) of 2 to 7 mm, and D of 5 to 20 μm:
• Aspect ratio (δ)=L/D [Equation 1]
• in Equation 1, L is a length of the glass fiber, D is a length of the longest side of the rectangular cross section, a length of a diameter of the circular cross section, or a length of the longest diameter of the elliptical cross section,
• in Chemical Formula 1,
• R1 to R4 are each independently hydrogen, C1-10 alkyl, C1-10 alkoxy, or halogen, and
• Z is C1-10 alkylene unsubstituted or substituted with phenyl, C3-15 cycloalkylene unsubstituted or substituted with C1-10 alkyl, O, S, SO, SO2, or CO;
• in Chemical Formula 3,
• X2 is each independently C1-10 alkylene,
• Y1 is each independently hydrogen, C1-6 alkyl, halogen, hydroxy, C1-6 alkoxy or C6-20 aryl,
• R6 is each independently hydrogen;
• C1-15 alkyl unsubstituted or substituted with oxiranyl, oxiranyl-substituted C1-10 alkoxy, or C6-20 aryl;
• halogen;
• C1-10 alkoxy;
• allyl;
• C1-10 haloalkyl;
• or C6-20 aryl, and
• n2 is an integer of 10 to 200.