Teijin Limited

Takushi Tani

Hiroshi Okamoto

Katsuhiro Yamanaka

Tsuyoshi Takeda

Tetsuya Motoyoshi

Kenta Imazato

A polycarbonate resin composition comprising a polycarbonate resin and 0.001 to 1 parts by weight of an N&#x2014;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&#xd7;10to 1&#xd7;10molar 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, 

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Osaka, Japan

Takushi Tani