67939-68-8 Adipic acid-propylene glycol-4,4'-dicyclohexylmethanediisocyanate polymer Hexanedioic acid, polymer with 1,1'-methylenebis(4-isocyanatocyclohexane) and 1,2-propanediol Propylene glycol, adipic acid, 4,4'-methylenebis(cyclohexylisocyanate)polymer