Liquid crystalline polyesters, their composition, and their uses
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United States of America Patent
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Nov 23, 1999
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app pub date -
Sep 30, 1998
filing date -
Sep 30, 1997
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Abstract
There are provided liquid crystalline polyesters comprising 4'-hydroxy-4-stilbenecarboxylic acid type units, dicarboxylic acid units acting as a mesogen such as 4,4'-stilbenecarboxylic acid and catechol units as essential ingredients, and a liquid crystalline polyester composition comprising said polyesters and optically active liquid crystalline polyesters consisting essentially of 4,4'-stilbenedicarboxylic acid type units and aliphatic diol units having asymmetric carbons.
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