1,3-Benzenedicarboxylic acid polymer with 1,4-benzenedicarboxylic acid, 1,3-diisocyanatomethylbenzene, 2-ethyl-2-(hydroxymethyl)-1,3-propane diol,α,α-[(1-methylethylidene)di-4,1-phenylene]bis[ω-hydroxypoly[oxy (methyl-1,2-ethanediyl)]], benzoate and