Liquid crystalline polyesters

Details Liquid crystalline polyesters Liquid crystalline polyesters

1994-01-26

1994-10-25

Wu, Shean

Compositions

Liquid crystal compositions

528299, 528308, 428 1, C09K 1952, C08G 6300

Patent

active

053586611

ABSTRACT:
It is intended to provide a novel polyester which is optically active, can be prepared easily and inexpensively and is superior in stability and solubility in solvents.
A liquid crystalline polyester consisting essentially of repeating units represented by the following formulae (a), (b), or (b') and (c): ##STR1## where the repeating unit c contains an optically active carbon and X is an alkyl group having 1 to 4 carbon atoms or a halogen atom, the repeating units a, b or b' and c being in mole ratios such that a/b is in the range from 95/5 to 5/95, a/b' is range from 95/5 to 50/50 and (a+b)/c or (a+b')/c is approximately 1.

REFERENCES:
patent: 5081221 (1992-01-01), Watanabe
patent: 5206752 (1993-04-01), Itoh et al.
patent: 5230825 (1993-07-01), Ishii et al.
patent: 5260109 (1993-11-01), Iida et al.
patent: 5288426 (1994-02-01), Itoh et al.

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