Patent ID: 7244804

Claim:
A polycarbonate copolymer (A) comprising an aromatic dihydroxy component, wherein the aromatic dihydroxy component comprises 5 to 95 mol % of fluorene-skeleton-containing dihydroxy compound (1) represented by the following general formula [1]: wherein R 1 to R 4 are each independently a hydrogen atom, a hydrocarbon group with 1 to 9 carbon atoms which may contain an aromatic group, or a halogen atom, and 95 to 5 mol % of dihydroxy compound (2) represented by the following general formula [2]: wherein R 5 to R 8 are each independently a hydrogen atom, a hydrocarbon group with 1 to 9 carbon atoms which may contain an aromatic group, or a halogen atom, and W is a single bond, a hydrocarbon group with 1 to 20 carbon atoms which may contain an aromatic group or an O, S, SO, SO 2 , CO or COO group, and wherein a content of fluorene-9-one in the polycarbonate copolymer is not higher than 15 ppm.