Disclosed is a polycarbonate resin composition including 1) a copolycarbonate having a repeating unit represented by Chemical Formula 1, a repeating unit represented by Chemical Formula 2, and a repeating unit represented by Chemical Formula 3, and 2) a polycarbonate: ##STR00001##
copolycarbonate in the composition provides improved melting properties while maintaining the physical properties of the copolycarbonate to the maximum.

The present invention relates to a polycarbonate-based resin composition and a molded article thereof, and more specifically, to a polycarbonate-based resin composition exhibiting improved impact strength (impact resistance) and chemical resistance while including a glass fiber in a relatively small content, and a molded article formed therefrom.

Disclosed is a polycarbonate composition including (a) a branched polycarbonate comprising a repeating unit represented by Chemical Formula 1 and a trivalent or tetravalent branched repeating unit connecting the plurality of repeating units represented by Chemical Formula 1 to each other; and (b) a copolycarbonate comprising an aromatic polycarbonate-based first repeating unit, and aromatic polycarbonate-based second repeating units having siloxane bonds which include a repeating unit represented by Chemical Formula 4 and a repeating unit represented by Chemical Formula 5: ##STR00001##
The polycarbonate composition improves flame retardancy and chemical resistance while maintaining high impact strength and melt index.

The present invention relates to a polycarbonate-based resin composition and a molded article thereof, and more specifically, to a polycarbonate-based resin composition exhibiting high fluidity and excellent chemical resistance and impact resistance, and a molded article formed therefrom.

The present invention relates to a polycarbonate based resin composition and molded articles thereof, and more particularly, to a polycarbonate based resin composition of which impact strength, flowability (fluidity), and the like, are improved, and molded articles thereof.

The present invention relates to a polycarbonate-based resin composition and a molded article thereof, and more particularly, to a polycarbonate-based resin composition exhibiting low deformation characteristic, excellent impact strength, excellent appearance surface characteristic, and excellent flame retardancy, and a molded article formed therefrom.

The present invention provides a flame resistant polycarbonate-based resin composition and molded articles thereof, and specifically, a polycarbonate-based resin composition having excellent heat resistance and impact resistance and improved flame retardancy, and molded articles formed from the polycarbonate-based resin composition.

Disclosed is a copolycarbonate composition including: a copolycarbonate having an aromatic polycarbonate-based first repeating unit and one or more aromatic polycarbonate-based second repeating units having siloxane bonds; and a polycarbonate, where the copolycarbonate composition has an impact strength at room temperature of 830 to 1000 J/m as measured at 23 C. in accordance with ASTM D256 ( inch, Notched Izod), where the one or more aromatic polycarbonate-based second repeating units having siloxane bonds include a repeating unit represented by Chemical Formula 2 and a repeating unit represented by Chemical Formula 3: ##STR00001##
and where the copolycarbonate composition satisfies the following Equation 1:
1.0682X+0.51<Y<1.0682X+1.2.[Equation 1] The copolycarbonate composition provides an improved mobility.

The present invention relates to a copolycarbonate resin composition having improved mechanical properties such as impact resistance and chemical resistance while maintaining resin flowability, and an article including the same.

Disclosed is a polycarbonate composition including a polycarbonate; and a copolycarbonate, where the copolycarbonate includes an aromatic polycarbonate-based first repeating unit; and aromatic polycarbonate-based second repeating units having siloxane bonds, which include a repeating unit represented by Chemical Formula 2 and a repeating unit represented by Chemical Formula 3, where the copolycarbonate has a melt index (MI) of 3 to 9 g/10min as measured in accordance with ASTM D1238 (300 C., 1.2 kg conditions), and a transparency of 87 to 91% as measured in accordance with ASTM D1003 (layer thickness of 3 mm): ##STR00001## The copolycarbonate in the composition exhibits an excellent transparency and a high spiral flow while having a high impact strength at room temperature and a low melt index.