Moldable polyester resin having high melting heat stability...

Details Moldable polyester resin having high melting heat stability... Moldable polyester resin having high melting heat stability...

C - Chemistry, Metallurgy

08

G

C08G 63/181 (2006.01) C08G 63/672 (2006.01)

Patent

CA 2058340

Abstract The object of the present invention is to improve the thermal stability of polycyclohexylene- dimethylene terephthalate in a molten state. The constitution of the present invention is that, in the production of a polyester mainly comprising an aromatic dicarboxylic acid or its ester- forming derivative (a) and an aliphatic dihydroxy compound (b) comprising at least 35 mole % of 1,4-cyclohexanedimethanol, an ester-forming diol compound (c) of the following general formula (I) is further copolymerized therewith in such an amount that 0.1 to 30 mole %, based on the aromatic dicarboxylic acid group. thereof is introduced thereinto: HO-R-O-A-O-R-OH (I) wherein A 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.

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