Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1980-01-04
1981-08-25
Welsh, Maurice J.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
260 40R, 260 40P, 528176, 528190, 528193, 528194, C08G 6302
Patent
active
042858526
ABSTRACT:
A wholly aromatic polyester capable of forming an anisotropic melt is prepared which is derived from 4-hydroxy-4'-carboxy azobenzene or its halogen, lower alkyl or lower alkoxy derivatives. Additional aryl moieties, such as those derived from aromatic hydroxy acids (e.g., p-hydroxybenzoic acid, 6-hydroxy-2-naphthoic acid), or an aromatic diol (e.g., hydroquinone) in combination with an aromatic diacid (e.g., terephthalic acid), may be included with the moiety derived from 4-hydroxy-4'-carboxy azobenzene. The polyester is preferably prepared by the melt polymerization of the esterified (e.g., acetylated) monomer or monomers (as described). The polyester may be melt processed into fibers, films or other shaped articles which may include conventional filler materials and/or reinforcing agents.
REFERENCES:
patent: 3493522 (1970-02-01), Webb
patent: 3639340 (1972-02-01), Balme et al.
patent: 3966678 (1976-06-01), Gruffaz et al.
patent: 3991013 (1976-11-01), Pletcher
Korshak et al. Chem. Abstr., vol. 62, 1965, 13252e.
Korshak et al. Chem. Abstr., vol. 63, 1965, 687b.
Celanese Corporation
Genoni Kenneth A.
Welsh Maurice J.
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