1,4-Benzenedicarboxylic acid, polymer with 2,2-dimethyl-1,3-propanediol and 2-ethyl-2-(hydroxymethyl)-1,3-propanediol 157483-52-8 53808-40-5 Terephthalic acid, neopentyl glycol, trimethylolpropane polymer Terephthalic acid, trimethylolpropane, neopentyl glycol polyester