Thermotropic polyesters of 2,6-dihydroxyanthraquinone

Details Thermotropic polyesters of 2,6-dihydroxyanthraquinone Thermotropic polyesters of 2,6-dihydroxyanthraquinone

1979-03-16

1980-09-23

Lee, Lester L.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528125, 528173, 528190, 528481, 528483, C08G 6306, C08G 6318, C08G 6360

Patent

active

042244331

ABSTRACT:
A thermotropic wholly aromatic polyester is provided which is capable of forming an anisotropic melt phase. This novel polyester displays surprising tractability and may be used as a molding resin or may be melt spun into fibers. The aromatic polyester of the present invention consists essentially of the recurring units (a) 2,6-dioxyanthraquinone moiety, (b) 4-oxybenzoyl moiety, and (c) aromatic diacid moiety. The resulting polyester exhibits a melting point below approximately 375.degree. C., and preferably below approximately 350.degree. C. Fibers which are melt spun from the polyester exhibit unexpectedly good thermal stability. The desirable tractability properties of the polyester are attributed to its anisotropic melt phase, which is due to the inclusion of the 2,6-dioxyanthraquinone moiety in the polymer.

REFERENCES:
patent: 3721649 (1973-03-01), Dominguez-Burguette
patent: 3876724 (1975-04-01), Dominguez-Burguette
patent: 4067852 (1978-01-01), Calundann
patent: 4130545 (1978-12-01), Calundann
patent: 4161470 (1979-07-01), Calundann

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