LIQUID CRYSTALLINE COPOLYESTERS OF 4-HYDROXYBENZOIC ACID AND SUBSTITUTED 4-HYDROXYBENZOIC ACIDS

摘要

Disclosed is a copolymer capable of forming an optically anisotropic melt comprising recurring structural units of Formulas I, II, and optionally III I, II, III, wherein each R is independently a chemically inert substituent; and each R1 is independently benzoil or phenoxy. The present invention also relates to a 36,711-F process for preparing the copolymer. The copolymer of the present invention usually have a melting point below 350.degree.C and can be readily melt extruded into fibers, films or the like. 36,711-F