HALOGENATION OF 4,4'-METHYLENE-BIS-ANILINES

摘要

Described is a process for the preparation of halogenated 4,4'-methylene-bis- anilines by a direct halogenation of 4,4'-methylene-bis-anilines. High yields and a flexible control of the grade of halogenation at the aromatic rings can be achieved when treating a mixture of a 4,4'-methylene-bis-aniline and sulfuric acid with a halogen such as chlorine. The obtained halogenated 4,4'-methylene-bis-anilines and mixtures thereof can be used in the preparation of polyurethanes and epoxy resins and for adjusting the gel times thereof.