Thermotropic liquid-crystalline aromatic coplymers

Details Thermotropic liquid-crystalline aromatic coplymers Thermotropic liquid-crystalline aromatic coplymers

1992-07-24

1993-08-03

Kight, III, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528176, 528184, 528190, 528193, 528194, C08G 6300, C08G 6302

Patent

active

052330133

ABSTRACT:
Liquid-crystalline, completely aromatic copolyesters are disclosed, which are endowed with a heat stability not lower than 350.degree. C., and are constituted by a succession of repeatitive units containing: ##STR1## wherein A and B, which can be either equal to, or different, from, each other, can be either --0-- or and one of the following moieties: ##STR2## in which Ar can be 1,4-phenylene, 2-monosubstituted-1,4-phenylene or 4,4'-diphenylene.
Also copolyesters also containing amidic bonding groups are disclosed.

REFERENCES:
Jung-Il Jin et al. "Synth. of Coplyesters . . . Having Ordered Monomer Sequence," Macromolecules 1989, 22, 4402-4408.

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