Polyester of 6-hydroxy-2-naphthoic acid, para-hydroxybenzoic acid, 2,6-dioxyanthraquinone, and aromatic diacid

摘要

A novel wholly aromatic polyester is provided which exhibits an optically anisotropic melt phase and an unusually low melting temperature which renders the same particularly suited for use as a matrix resin in the formation of a fiber reinforced composite article, etc. The polyester of the present invention consists essentially of recurring 6-oxy-2-naphthoyl moiety, p-oxybenzoyl moiety, 2,6-dioxyanthraquinone moiety, and dicarboxy aryl moiety (as described). The hydrogen atoms present upon the aromatic rings of these moieties optionally may be partially substituted (as described). The wholly aromatic polyester is capable of forming the desired anisotropic melt at a temperature below 260 DEG C., and in a particularly preferred embodiment at a temperature below approximately 250 DEG C.