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 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.

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 are new classes of diphenol compounds, derived from tyrosol or tyrosol analogues and hydroxybenzoic acid, which are useful as monomers for preparation of biocompatible polymers. Also disclosed are biocompatible polymers prepared from these monomeric diphenol compounds, including novel biodegradable and/or bioresorbable polymers of formula. These biocompatible polymers or polymer compositions with enhanced bioresorbabilty and processibility are useful in a variety of medical applications, such as in medical devices and controlled-release therapeutic compositions. The invention also provides methods for preparing these monomeric diphenol compounds and biocompatible polymers.

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Disclosed are new classes of diphenol compounds, derived from tyrosol or tyrosol analogues and hydroxybenzoic acid, which are useful as monomers for preparation of biocompatible polymers. Also disclosed are biocompatible polymers prepared from these monomeric diphenol compounds, including novel biodegradable and/or bioresorbable polymers of formula. These biocompatible polymers or polymer compositions with enhanced bioresorbabilty and processibility are useful in a variety of medical applications, such as in medical devices and controlled-release therapeutic compositions. The invention also provides methods for preparing these monomeric diphenol compounds and biocompatible polymers.

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Disclosed is a copolycarbonate having an aromatic polycarbonate-based first repeating unit and one or more aromatic polycarbonate-based second repeating units having siloxane bonds, where the copolycarbonate provides an improved residence heat stability, and where the second repeating unit includes a repeating unit represented by Chemical Formula 2 and a repeating unit represented by Chemical Formula 3: ##STR00001##

Disclosed is a copolycarbonate having an aromatic polycarbonate-based first repeating unit and one or more aromatic polycarbonate-based second repeating units having siloxane bonds, where the copolycarbonate provides an improved residence heat stability, and where the second repeating unit includes a repeating unit represented by Chemical Formula 2 and a repeating unit represented by Chemical Formula 3: ##STR00001##

The present invention relates to a process for preparing aromatic polycarbonates, comprising the step of reacting bisphenols with dithiocarbonates or selenium analogs thereof in the presence of a catalyst. It further relates to the use of dithiocarbonates or selenium analogs thereof as transesterifying reagents for the preparation of polycarbonates.

The present invention relates to a process for preparing aromatic polycarbonates, comprising the step of reacting bisphenols with dithiocarbonates or selenium analogs thereof in the presence of a catalyst. It further relates to the use of dithiocarbonates or selenium analogs thereof as transesterifying reagents for the preparation of polycarbonates.