Melt processable polyester capable of forming an anisotropic mel

Details Melt processable polyester capable of forming an anisotropic mel Melt processable polyester capable of forming an anisotropic mel

1983-05-06

1985-06-11

Lee, Lester L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524601, 524604, 528125, 528128, 528173, 528190, 528191, 528193, 528194, 528271, C08G 6360

Patent

active

045229740

ABSTRACT:
The novel polyester of the present invention is capable of forming an anisotropic melt phase and may be prepared on a relatively economical basis. Such polyester includes a relatively low concentration of 6-oxy-2-naphthoyl moiety in combination with a more substantial concentration of 4-oxybenzoyl moiety. Other key moieties present are 1,4-dioxyphenylene moiety, isophthaloyl moiety and terephthaloyl moiety. The polyester has been found to be capable of undergoing melt extrusion to form quality high performance fibers, films, and three-dimensional shaped articles. The inclusion of terephthaloyl moiety has been found to enhance the modulus and strength of articles formed from the polyester as well as the hydrolytic stability of the same. Additionally, such articles can be subjected to higher use temperatures than if the terephthaloyl moiety were omitted.

REFERENCES:
patent: 4184996 (1980-01-01), Calundann
patent: 4219461 (1980-08-01), Calundann
patent: 4256624 (1981-03-01), Calundann
patent: 4299756 (1981-11-01), Calundann
patent: 4318842 (1982-03-01), East et al.
patent: 4337190 (1982-06-01), Calundann
patent: 4347349 (1982-08-01), Siemionko

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