ABSTRACT Novel polyhydantoins (PHYs) were synthesized from original aromatic diisocyanates and bisiminoacetates by a two-step polycondensation procedure, which involved the cyclization of polyurea intermediates promoted by acid catalysis. The physical properties of the novel PHYs were evaluated by comparing them with a classical PHY derived from 4, 4′-methylenediphenyl diisocyanate. All PHYs were soluble and could be ...
