| 摘要 |
Disclosed is a polycarbonate resin composition for the production of a substrate for an optical information medium, comprising 100 parts by weight of a polycarbonate resin, and 0.0005 to 1.0 part by weight of a mold release agent, wherein the composition exhibits a relative viscosity (etar) within the range of from 1.17 to 1.19, the relative viscosity (etar) being defined as the ratio (eta/etao) of viscosity value (eta) (25° C.) of a methylene chloride solution of the composition (concentration: 0.005 g/cm3) to viscosity value (etao) (25° C.) of methylene chloride, and wherein the relative viscosity (etar) of the composition and a melt index (MI) (JIS K 7210, at 280° C., under a load of 2.16 kg) of the composition satisfy the following formulae (I) and (II): <paragraph lvl="0"><in-line-formula>etar>=-0.0723 log MI+1.316 (I) and </in-line-formula><paragraph lvl="0"><in-line-formula>etar<=-0.0723 log MI+1.324 (II). </in-line-formula>
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