Abstract: A polycarbonate resin composition comprising a polycarbonate resin and 0.001 to 1 parts by weight of an N—R type (R represents an alkyl group) hindered amine-based optical stabilizer per 100 parts by weight of the polycarbonate resin, wherein the polycarbonate resin comprises 40 mol % or more of a recurring unit (A) represented by the following formula, a metal compound comprising a negative ion represented by the following formula (B) and a positive ion constituted by a metal is used as a polymerization catalyst in an amount of 1×10?9 to 1×10?5 molar equivalent relative to the total diol compounds used for polymerization, and the resin composition has excellent heat resistance, a low water absorption coefficient and high transparency, and suppresses deterioration during long-term use, wherein R1 is an alkylene group, a cycloalkylene group, or an arylalkylene group which has 1 to 22 carbon atoms and may be linear or branched.

Abstract: A polycarbonate resin composition comprising a polycarbonate resin and 0.001 to 1 parts by weight of an N—R type (R represents an alkyl group) hindered amine-based optical stabilizer per 100 parts by weight of the polycarbonate resin, wherein the polycarbonate resin comprises 40 mol % or more of a recurring unit (A) represented by the following formula and satisfies the following formulas (i) to (v), and the resin composition has excellent heat resistance, a low water absorption coefficient and high transparency, and suppresses deterioration during long-term use: (i) a metal compound comprising a negative ion represented by the following formula (B) and a positive ion constituted by a metal is used as a polymerization catalyst in an amount of 1×10?9 to 1×10?5 molar equivalent relative to the total diol compounds used for polymerization; (ii) the specific viscosity measured with a methylene chloride solution at 20° C. is 0.23 to 0.60; (iii) the glass transition temperature is 100° C. to 160° C.

Abstract: A molded article such as a resin window or a lamp lens for vehicles which is formed from a polycarbonate and excellent in heat resistance, weather resistance, low water absorption, surface hardness and low-temperature impact properties. The molded article is formed from a polycarbonate which contains a unit (A) represented by the following formula (A) in an amount of 50 mol % or more based on the total of all recurring units and has a maximum impact energy of 20 J or more in a high-speed surface impact test based on ASTM D3763 in a ?20° C. environment and a brittle fracture rate of 50% or less.