Patent ID: 8703011

Claim:
A class of liquid crystalline polyester consisting of repeat units of the formula: wherein the mole percent (mole%) of (A), (B), (C), and (D) are 34-72%, 12-26%, 4-21%, and 4-21%, respectively, for any combination of (A), (B), (C), and (D) in the compositional ranges, the mole percent of (C) and (D) is equal to each other, and the total mole percent of (A), (B), (C), and (D) is 100%; said liquid crystalline polyesters have a melting point equal to or below 355° C., and an inherent viscosity of 6.0-10.0 dL/g, wherein the inherent viscosity is measured at 60° C. on a solution of 0.1 g/100 mL in pentafluorophenol, and wherein the polymerization temperature in the final stage of the polymerization is set to be within about 320-380° C.