Inventors:
Larry F. Charbonneau - Mendham NJ
John A. Flint - Berkeley Heights NJ
Gabor D. Kiss - Long Valley NJ
James P. Shepherd - Springfield NJ
Assignee:
Hoechst Celanese Corporation - Somerville NJ
International Classification:
C08G 6302, C08G 6318, C08G 6300
Abstract:
The novel polyester of the present invention is melt processable and is capable of forming an anisotropic melt phase. The polyester includes a relatively low concentration of 6-oxy-2-naphthoyl moiety. Other key moieties are 4-oxybenzoyl moiety, terephthaloyl moiety, 1,4-dioxyphenylene moiety, and 4,4'-dioxybiphenyl moiety. The presence of the 1,4-dioxyphenylene moiety in the specified concentration in combination with the other moieties surprisingly has been found to be capable of advantageously lowering the melting temperature of the resulting polyester while making possible the substantial maintenance of a highly attractive heat deflection temperature in molded articles formed from the same. Fibers which exhibit a relatively high modulus also may be formed.