Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1980-01-04
1981-05-05
Lee, Lester L.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
260 40R, 260334P, 528173, 528190, 528193, 528194, 528271, 528298, 528360, 528361, C08G 6360, C08G 6366
Patent
active
042658020
ABSTRACT:
A novel polyester is provided which has been found to exhibit an optically anisotropic melt phase which enables it readily to undergo melt processing to form quality fibers, films, molded articles, etc. The polyester of the present invention contains recurring para-oxybenzoyl and para-phenylenedioxy-4,4'-dibenzoyl moieties in addition to moieties derived from at least one aromatic diol and at least one additional aromatic diacid in the proportions indicated. The hydrogen atoms present upon the aromatic rings derived from the aromatic diol and additional aromatic diacid optionally may be at least partially substituted (as described). The wholly aromatic polyester is capable of forming the desired anisotropic melt at a temperature below approximately 400.degree. C., and in a preferred embodiment at a temperature below approximately 360.degree. C.
REFERENCES:
patent: 3884876 (1975-05-01), Cottis et al.
patent: 4066620 (1978-01-01), Kleinschuster et al.
patent: 4118372 (1978-10-01), Schaefgen
patent: 4130545 (1978-12-01), Calundann
Celanese Corporation
Genoni Kenneth A.
Lee Lester L.
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