Adipic acid, ethylene glycol, 1,4-butanediol, p,p'-diphenylmethane diisocyanate polymer

Adipic acid, polymer with 1,4-butanediol, ethylene glycol and methylenedi-p-phenylene isocyanate

Hexanedioic acid, polymer with 1,4-butanediol, 1,2-ethanediol and 1,1-methylenebis4-isocyanatobenzene