| 摘要 |
PROBLEM TO BE SOLVED: To obtain the subject composition having excellent molding heat resistance, wet heat fatigue resistance and adhesiveness while maintaining transparency and mold release characteristics, hardly causing white defects in an optical disc substrate by making the composition include a specific aromatic polycarbonate resin and an internal mold-releasing agent in a specific ratio. SOLUTION: This composition comprises (A) 100 pts.wt. of an aromatic polycarbonate resin having <=4×10-3 relative fluorescence intensity based on a reference material at 465 nm when measured by a fluorescence spectrum (excitation wavelength 320 nm) and 10,000-50,000 viscosity-average molecular weight obtained from a dihydric phenol (e.g. homopolymer of biphenol A, etc.), and a carboxylic acid ester (e.g. diphenyl carbonate, etc.), by a melt polymerization and (B) 0.001-1.0 pt.wt. of an internal mold-releasing agent having <=5 acid value and composed of >=90 wt.% of an ester of an alcohol and a fatty acid. The composition comprises 0.0001-1 pt.wt. a phosphorus-based stabilizer which has preferably 1-11,000 ppm concentration of phosphorous acid, chlorine atom and chloride ion and is a compound of the formula [Ar1 is an (alkyl- substituted) aromatic group], etc.
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