| abstract |
PURPOSE: To prepare a colored polyester copolymer moldable in molten state, having high elastic modulus and excellent flexural strength and impact strength and suitable for tire cord, belt, magnetic tape, etc., by copolymerizing a dicarboxylic acid component having a specific structure. n CONSTITUTION: The objective copolymer can be produced by the polycondensa tion of (A) an acid component composed of (i) 0.05W55mol% 3,9- perylenedicarboxylic acid (ester) of formula I and (ii) 99.95W45mol% dicarboxylic acid (ester) of formula II (R is dicarboxylic acid residue selected from the groups of formula III, formula IV, etc.) and (B) a diol component (e.g. ethylene glycol) e.g. by direct polymerization process, ester exchange process, etc. n COPYRIGHT: (C)1986,JPO&Japio |