Polyester of 6-hydroxy-2-naphthoic acid, 4-hydroxy benzoic acid,

Details Polyester of 6-hydroxy-2-naphthoic acid, 4-hydroxy benzoic acid, Polyester of 6-hydroxy-2-naphthoic acid, 4-hydroxy benzoic acid,

1981-07-27

1982-10-19

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, 528173, 528190, 528191, 528193, 528271, C08G 6360

Patent

active

043551335

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 molded articles possessing unusually high impact properties, etc. The polyester of the present invention contains recurring 6-oxy-2-naphthoyl, 4-oxybenzoyl, and 1,4-dicarboxycyclohexane moieties in addition to a moiety derived from an aromatic diol in the proportions indicated. The hydrogen atoms present upon the aromatic rings optionally may be at least partially substituted (as described). The polyester is capable of forming the desired anisotropic melt at a temperature below approximately 350.degree. C., and in a particularly preferred embodiment at a temperature below approximately 320.degree. C.

REFERENCES:
patent: 3143526 (1964-08-01), Caldwell et al.
patent: 4083829 (1978-04-01), Calundann et al.
patent: 4161470 (1979-07-01), Calundann
patent: 4232143 (1980-11-01), Irwin
patent: 4256624 (1981-03-01), Calundann
patent: 4279803 (1981-07-01), Calundann

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