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.
提供了由 4'-羟基-4-二
苯甲酸型单元、作为中间体的二
羧酸单元(如 4,4'-二
苯甲酸和
邻苯二酚单元)作为基本成分组成的液晶聚酯,以及由上述聚酯和主要由 4,4'-二
苯甲酸型单元和具有不对称碳原子的脂肪族二元醇单元组成的光学活性液晶聚酯组成的液晶聚酯组合物。