Patent ID: 7202323

Claim:
A polycarbonate resin of a polystyrene-converted weight average molecular weight (Mw) of 20,000 to 200,000 obtained by forming a carbonate bond from a dihydroxy compound represented by the following general formula (1), a dihydroxy compound represented by the following general formula (2) and at least one compound (6) selected from the group consisting of dihydroxy compounds represented by the following structural formulas (3), (4) and (5) and a carbonic acid diester or phosgene; wherein R 1 and R 2 are, each independently, a hydrogen atom, an alkyl group of 1 to 8 carbon atoms, a cycloalkyl group of 5 to 20 carbon atoms, an alkoxyl group of 1 to 8 carbon atoms, an aryl group of 6 to 10 carbon atoms or an aryloxy group of 6 to 10 carbon atoms and X is a single bond, an oxygen atom, a sulfur atom, a sulfonic group, an alkylidene group of 2 to 10 carbon atoms, a cycloalkylidene group of 5 to 12 carbon atoms, an arylalkylidene group of 7 to 15 carbon atoms, a fluorenylidene group or an α, α, α′, α′-tetramethylxylidene group; wherein R 3 and R 4 are, each independently, an alkyl group of 3 to 10 carbon atoms or a cycloalkyl group of 5 to 20 carbon atoms; R 5 and R 6 are, each independently, a methyl group or an ethyl group and Y is a single bond, an oxygen atom, a sulfur atom, a sulfonic group, an alkylidene group of 1 to 8 carbon atoms, a cycloalkylidene group of 5 to 12 carbon atoms, an arylalkylidene group of 7 to 15 carbon atoms, a fluorenylidene group or an α, α, α′, α′-tetramethylxylidene group;