Polyester of 6-hydroxy-2-naphthoic acid and para-hydroxy benzoic

Details Polyester of 6-hydroxy-2-naphthoic acid and para-hydroxy benzoic Polyester of 6-hydroxy-2-naphthoic acid and para-hydroxy benzoic

1977-10-20

1979-07-17

Lee, Lester L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 40R, 528190, 528206, C08G 6306

Patent

active

041614704

ABSTRACT:
A novel polyester is provided which has been found to exhibit a thermotropic melt phase at a temperature which enables it readily to undergo melt processing to form quality fibers, molded articles, etc. The polyester of the present invention is formed primarily of recurring 6-oxy-2-naphthoyl and p-oxybenzoyl moieties in the proportions indicated. The hydrogen atoms present upon the aromatic rings of these moieties optionally may be at least partially substituted (as described). Also, minor amounts of other ester-forming moieties may be included in the polyester so long as the thermotropic character and ease of melt processability is retained. In a preferred embodiment the wholly aromatic polyester is capable of undergoing melt processing at a temperature below approximately 325.degree. C., and in a particularly preferred embodiment at a temperature of approximately 280.degree. to 300.degree. C.

REFERENCES:
patent: 4067852 (1978-01-01), Calundann et al.
patent: 4083829 (1978-04-01), Calundann et al.
patent: 4118372 (1978-10-01), Schaefgen

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