METHOD FOR PREPARING POLYAMINE Russian patent published in 2004 - IPC

FIELD: organic chemistry, chemical technology. SUBSTANCE: invention relates to method for preparing polyamine of the general formula: wherein n = 0, 1; m = 1, 2; n + m = 1-3. Polyamines are prepared by heating 20-40% ammonia water and formaldehyde-containing compound taken in the mole ratio as measured for ammonia and formaldehyde = 1. Carbamidoformaldehyde concentrate is used as formaldehyde-containing compound of the following composition, wt.-%: carbamide in all forms, 20-25; formaldehyde in all forms, 50-60; water, the balance. Invention provides preparing polyamine eliciting stability to effect of strong mineral acid. EFFECT: improved preparing method, valuable chemical properties of polyamine. 3 ex