Optical-grade polycarbonate resin compositions that contain :
A) 100 parts by weight of a polycarbonate having a viscosity-average molecular weight of 12,000-18,000 and
B) 0.001-5 parts by weight of an ester of an aliphatic carboxylic acid and an alcohol,
which polycarbonate is the product of the melt-polymerization of an aromatic dihydroxy compound and a diester carbonate, have excellent adhesion to aluminum, a good releasability and heat stability, and experiences very little discoloration or molecular reduction during molding.
含有 :
A) 100 份(重量)粘度-平均分子量为 12,000-18,000 的聚
碳酸酯和
B) 0.001-5 重量份的脂肪族
羧酸和醇的酯、
这种聚
碳酸酯是芳香族二羟基化合物和
碳酸二酯熔融聚合的产物,与铝有极好的粘附性,良好的脱模性和热稳定性,在成型过程中很少变色或分子减少。