Patent ID: 7884173

Claim:
An aromatic polyester comprising a dicarboxylic acid component and a diol component, wherein (i) the dicarboxylic acid component contains 50 to 100 mol % of a recurring unit represented by the following formula (A) and 50 to 0 mol % of a recurring unit represented by the following formula (B), and the diol component contains 90 to 100 mol % of a recurring unit represented by the following formula (C), wherein R is an alkylene group having 2 to 10 carbon atoms, wherein Ar is a hydrocarbon group having 2 to 10 carbon atoms; —O—CH 2 CH 2 —O— (C) (ii) the aromatic polyester has an intrinsic viscosity measured at 35° C. by using a mixed solvent of P-chlorophenol and 1,1,2,2-tetrachloroethane (weight ratio of 40/60) of 0.4 to 3.0; (iii) the aromatic polyester has a content of a recurring unit represented by the following formula (D) of less than 10 mol %; —O—CH 2 CH 2 —O—CH 2 CH 2 —O— (D) (iv) the aromatic polyester has a terminal carboxyl group concentration of 200 eq/ton or less; and (v) the aromatic polyester has an alkali metal content of 300 ppm or less.