Thermotropic polymers containing 2,5-dicarboxythiophene units

Details Thermotropic polymers containing 2,5-dicarboxythiophene units Thermotropic polymers containing 2,5-dicarboxythiophene units

1994-12-22

1996-04-23

Dodson, Shelly A.

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

Synthetic resins

From carboxylic acid or derivative thereof

528312, 528313, 528321, 528322, 528324, 528373, 528377, 528380, C08G 7500, C08G 7310

Patent

active

055104550

ABSTRACT:
A new class of thermotropic liquid crystalline polymers comprises monomers units I, II, III, and IV, where ##STR1## Ar.sup.1, Ar.sup.2 and Ar.sup.3 are each independently selected from the group consisting of 1,3-phenylene, 1,4-phenylene, 2,6-naphthylene, 2,7-naphthylene, 4,4'-biphenylene, bis-aryl moieties having the formula ##STR2## and mixtures thereof. In the bis-aryl moieties, each X can be S, O, CO, SO, SO.sub.2, C(CH.sub.3).sub.2 or C(CF.sub.3).sub.2.

REFERENCES:
patent: 2551731 (1951-05-01), Drewitt
patent: 5266677 (1993-11-01), Samulski et al.
patent: 5354836 (1994-10-01), Samulski et al.
R. Cai, et al., Macromolecules (1992), vol. 25, pp. 563-568.
R. Cai, et al., Liquid Crystals (1991), vol. 9, No. 5, pp. 617-634.
J. M. DeSimone, et al., Polymer Preprints (1991), vol. 32, No. 2, pp. 172-173.

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