PROCESS FOR THE PREPARATION OF DI- AND POLYAMINES OF THE DIPHENYLMETHANE SERIES

• Main Authors: STEFAN WERSHOFEN, STEFAN GRABOWSKI DR, HEINZ-HERBERT MUELLER
• Format: Patent
• Language: English; Portuguese
• Published: 04.05.2010
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC CHEMISTRY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

Preparation of di- and polyamine of diphenylmethane group (I) comprises reacting aniline and formaldehyde in the presence of hydrochloric acid (less than 0.001 wt.%) (containing bivalent and/or higher valency metal ions). An independent claim is also included for the preparation of di- and polyisocy...