[EN] HALOGENATION OF 4,4'-METHYLENE-BIS-ANILINES<br/>[FR] HALOGÉNATION DES 4,4'-MÉTHYLÈNE-BIS-ANILINES
申请人:LONZA AG
公开号:WO2012028323A1
公开(公告)日:2012-03-08
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.
Substituted p,p'-methylene-bis-anilines
申请人:Lonza Ltd.
公开号:US04950792A1
公开(公告)日:1990-08-21
New methylenebis(metachloro)anilines which are chain-lenghtening agents or cross-linking agents for polyurethanes.