| 摘要 |
<p>An aromatic copolyester comprising substantially equimolar proportions of ¢A! units derived from an aromatic dicarboxylic acid having 8 to 16 carbon atoms, and ¢B! units derived from an aromatic diol component; characterized in that (I) the diol component ¢B! is composed of 20 to 95 mole %, based on the total moles of compounds (a) and (b) below, of (a) a bisphenol compound represented by the formula < IMG > wherein X represents a divalent group selected from the class consisting of C1-C8 alkylidene groups, O, S and SO2, and (b) 5 to 80 mole %, based on the total moles of the compounds (a) and (b), of a compound selected from the group consisting of a specific divalent phenolic compound, and (II) the aromatic copolyester has an intrinsic viscosity ¢?!, determined at 60.degree.C in pentafluorophenol, of at least 0.4 dl/g.</p> |
