| abstract |
A polycarbonate composition which comprises 100 parts by weight of an aromatic polycarbonate, 0.005 to 0.2 parts by weight of an ester of a C10-25 aliphatic monocarboxylic acid with a C2-10 aliphatic polyhydric alcohol, and 0.015 to 0.3 parts by weight of a first aromatic compound which is an aromatic ether, ester, or carbonate compound having at least four benzene rings per molecule, wherein the amount of the ester is such that when the composition is injection-molded into a 2 mm-thick plate having dimensions of 120 mm x 50 mm under the conditions of a cylinder temperature of 380°C, mold temperature of 80°C, injection rate of 200 mm/sec, and holding pressure of 3,432 kPa (35 kgf/cm2), it leaves, on the mold surface which has been in contact with the polymer, a deposit in which the amount of the first aromatic compound is 0.5 to 3 parts by weight per part by weight of the ester. This composition is excellent not only in releasability from molds but in thermal stability during molding. |