1,3-Benzenedicarboxylic acid, polymers with adipic acid, 1,4-butanediol, 1,6-diisocyanato-2,4,4-trimethylhexane, 1,6-hexanediol, 3-hydroxy-2-(hydroxymethyl)-2-methylpropanoic acid, hydroxy-terminated polybutadiene, 5-isocyanato-1-(isocyanatomethyl)-1,3,3-trimethylcyclohexane and neopentyl glycol, compds. with triethylamine