Diphenylmethane-4,4'-diisocyanate, hydroquinone bis(2-hydroxyethyl ether), 1,4-butanediol, adipic acid polymer

Hexanedioic acid, polymer with 1,4-butanediol, 1,1-methylenebis4-isocyanatobenzene and 2,2-1,4-phenylenebis(oxy)bisethanol