| 摘要 |
PROBLEM TO BE SOLVED: To provide a polycarbonate copolymer containing a plant-derived raw material, which is excellent in the mechanical strength and heat-resistant and assured of small refractive index, large Abbe number, small birefringence and excellent transparency.SOLUTION: The present invention provides a polycarbonate copolymer containing a constitutional unit derived from a dihydroxy compound represented by general formula (1) and a constitutional unit derived from an alicyclic dihydroxy compound, wherein the Abbe number is 50 or more and the 5% thermal reduction temperature is 340°C or more; and a method of producing the polycarbonate copolymer by reacting a dihydroxy compound represented by general formula (1) and an alicyclic hydroxy compound with a carbonic acid diester in the presence of a polymerization catalyst. |
