AROMATIC COPOLYESTER DERIVED FROM AROMATIC DICARBOXYLIC ACID COMPONENT AND AROMATIC DIOL COMPONENT

摘要

ABSTRACT OF THE DISCLOSUREAn aromatic copolyester comprising substantiallyequimolar proportions of [A] units derived from an aromaticdicarboxylic acid having 8 to 16 carbon atoms, and [B] unitsderived 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 formulawherein X represents a divalent group selected from theclass consisting of C1-C8 alkylidene groups, O, S and SO2, and(b) 5 to 80 mole %, based on the total moles of thecompounds (a) and (b), of a compound selected from the groupconsisting of a specific divalent phenolic compound, and(II) the aromatic copolyester has an intrinsicviscosity [?], determined at 60°C in pentafluorophenol, of atleast 0.4 dl/g.