ALICYCLIC POLYESTER, METHOD FOR PRODUCING THE SAME, AND RESIN COMPOSITION

摘要

PROBLEM TO BE SOLVED: To provide an alicyclic polyester being suitable for use as an optical material, having little coloration and satisfactory thermal stability and hydrolytic stability and reduced in foreign-matter content; and a resin composition comprising the alicyclic polyester and a polycarbonate. SOLUTION: The alicyclic polyester is produced from a dicarboxylic acid ingredient comprising an alicyclic dicarboxylic acid as a major component and a diol ingredient comprising an alicyclic diol as a major component with the aid of a polycondensation catalyst comprising a titanium compound and an alkaline earth metal compound. The alicyclic polyester has a titanium content in terms of metal atom amount of≥1-25 wt.ppm to≤25 wt.ppm, a ratio of the weight of the alkaline earth metal (M) to the weight of the titanium in terms of metal atom amount ratio, (M/Ti), of 0.25-1.0, and an intrinsic viscosity of≥0.4 dl/g. The resin composition comprises the alicyclic polyester and the polycarbonate. COPYRIGHT: (C)2007,JPO&INPIT