POLYCARBONATE−BASED MOLDING MATERIALS AND OPTICAL DISK SUBSTRATES

摘要

A polycarbonate resin molding material comprising (A) 100 parts by weight of a polycarbonate resin and (B) 0.001 to 1.0 part by weight of a mold−releasing agent which is composed of (b1) a fatty acid ester and (b2) a phosphorus−containing heat stabilizer and has a content of the stabilizer (b2) of 0.0001 to 50 parts per 100 parts by weight of the ester (b1). The invention provides polycarbonate resin molding materials excellent in mold release characteristics and resistance to molding heat and articles molded therefrom, particularly a polycarbonate resin molding material suitable for the production of optical disk substrates which is excellent in mold release characteristics and heat stability in molding in spite of its containing reduced amounts of a mold−releasing agent and a heat stabilizer.