| abstract |
An aromatic-aliphatic copolycarbonate and a process fornproducing the same which comprises polycondensation of an aromaticndihydroxy compound, such as 1,1-bis(4-hydroxyphenyl)cyclohexane,ntricyclo(5.2.1.0 2,6 )decanedimethanol, and a carbonic acid diesternin a molten state under heating, wherein the carbonic acid diesternhas a chlorine content of 20 ppm or lower. The copolycarbonate hasnimproved refractive index, balance of dispersion, and photoelasticnconstant while retaining high impact resistance, high heatnresistance, and excellent hue. |