Wholly aromatic polyester comprising 4-oxy-4'-carboxybiphenyl mo

Details Wholly aromatic polyester comprising 4-oxy-4'-carboxybiphenyl mo Wholly aromatic polyester comprising 4-oxy-4'-carboxybiphenyl mo

1983-05-02

1984-02-14

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, 524605, 528173, 528190, 528191, 528206, 528271, C08G 6306, C08G 6360

Patent

active

044317700

ABSTRACT:
A novel wholly aromatic polyester is provided which contains specified concentrations of 6-oxy-2-naphthoyl and 4-oxy-4'-carboxybiphenyl moieties and which may optionally possess ring substitution (as described) upon such moieties. It has been found that the wholly aromatic polyester of the present invention is capable of exhibiting an anisotropic melt phase which is readily melt processable to form quality fibers, films, molded articles, etc. The color characteristics of the new polymer are excellent (i.e. the polymer is of a white or pale coloration). Additionally, since the new wholly aromatic polyester tends to incorporate a lesser number of ester units per unit weight it is expected to exhibit enhanced stability at elevated temperatures.

REFERENCES:
patent: 4318841 (1982-03-01), East et al.
patent: 4330457 (1982-05-01), East et al.
patent: 4337190 (1982-06-01), Calundann
patent: 4359569 (1982-11-01), Siemionko
patent: 4393191 (1983-07-01), East
patent: 4395513 (1983-07-01), Calundann

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