| abstract |
The present invention provides an alicyclic polyester that is suitable as an optical material, has little coloring, has good thermal stability and hydrolytic stability, and contains little foreign matter, and a resin composition of the alicyclic polyester and polycarbonate. [MEANS FOR SOLVING PROBLEMS] A dicarboxylic acid component mainly composed of an alicyclic dicarboxylic acid and a diol component mainly composed of an alicyclic diol, and produced using a titanium compound and an alkaline earth metal compound as a polycondensation catalyst. In the alicyclic polyester, titanium contained in the alicyclic polyester is 1 ppm by weight or more and less than 25 ppm by weight in terms of metal atom, and the ratio of titanium to alkaline earth metal (M) (M / Ti) is an alicyclic polyester having an atomic viscosity of 0.25 to 1.0 and an intrinsic viscosity of 0.4 dl / g or more, and a resin composition comprising the alicyclic polyester and a polycarbonate. [Selection figure] None |