Patent ID: 8431259

Claim:
A copolymerized aromatic polyester comprising aromatic dicarboxylic acid components represented by the following formulae (I) and (II) and a glycol component represented by the following formula (III), wherein a 4,4′-(alkylenedioxy)bisbenzoic acid component represented by the formula (I) is contained in an amount of 5% by mole or more and less than 90% by mole on the basis of a molar number of a wholly aromatic dicarboxylic acid component constituting the copolymerized aromatic polyester: wherein R A represents an alkylene group having 1 to 10 carbon atoms; R B represents a phenylene group or a naphthalenediyl group; and R C represents an alkylene group having 2 to 4 carbon atoms or a cycloalkylene group having 8 to 10 carbon atoms.