Process for preparing polyamides and polyisocyanates

Details Process for preparing polyamides and polyisocyanates Process for preparing polyamides and polyisocyanates

C - Chemistry, Metallurgy

08

G

C08G 12/08 (2006.01) C07C 263/10 (2006.01) C08G 18/70 (2006.01) C08G 18/76 (2006.01) C08G 73/02 (2006.01) C08J 9/04 (2006.01)

Patent

CA 2084156

Mo3712 MD-91-10-PU A PROCESS FOR PREPARING POLYAMINES AND POLYISOCYANATES ABSTRACT OF THE INVENTION Disclosed herein is an improved process for preparing a polyamine mixture derived by reacting aniline with formaldehyde in the presence of an acid catalyst the improvement comprising mildly reducing the polyamine mixture by a process step comprising catalytically or chemically hydrogenating the polyamine mixture in the presence of a metal catalyst. Mo3712

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