Mouldable polyester resin having high melting heat stability and moulded article produced therefrom.

摘要

A moldable polyester resin of the polycyclohexylenedimethylene terephthalate type and having improved thermal stability in the molten state is provided by (a) an aromatic dicarboxylic acid or its ester-forming derivative, and (b) an aliphatic dihydroxy compound comprising at least 35 mole % of 1,4-cyclohexanedimethanol, which resin is produced by copolymerizing components (a) and (b) with (c) an ester-forming diol compound of the following general formula HO-R-0-A-0-R-OH (I) in such an amount that 0.1 to 30 mole % thereof, based on the aromatic dicarboxylic acid group, is introduced thereinto, wherein A in formula (I) represents a divalent organic radical having at least one aromatic ring and R represents a divalent organic radical selected from among aliphatic hydrocarbon groups having 2 to 8 carbon atoms and polyoxyalkylene groups. l