Process for preparing polyamines and polysocyanates

Details Process for preparing polyamines and polysocyanates Process for preparing polyamines and polysocyanates

1998-09-14

1999-03-30

Gorr, Rachel

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

560352, 560353, 564334, C08G 1876

Patent

active

058890700

ABSTRACT:
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.

REFERENCES:
patent: 4465639 (1984-08-01), Hatfield, Jr.
patent: 4766247 (1988-08-01), Ford et al.
patent: 4792624 (1988-12-01), Hatfield, Jr.

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