Aromatic copolyester derived from aromatic dicarboxylic acid...

Details Aromatic copolyester derived from aromatic dicarboxylic acid... Aromatic copolyester derived from aromatic dicarboxylic acid...

C - Chemistry, Metallurgy

08

G

402/187

C08G 63/18 (2006.01) C08G 63/193 (2006.01)

Patent

CA 1228195

ABSTRACT OF THE DISCLOSURE 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 Image 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°C in pentafluorophenol, of at least 0.4 dl/g.

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