Method for making a polyamine

Details Method for making a polyamine Method for making a polyamine

C - Chemistry, Metallurgy

08

G

260/456.1, 260/5

C08G 12/08 (2006.01)

Patent

CA 1041109

Abstract of the Disclosure A process is provided for making an aromatic polyamine by condensing an aromatic amine with formaldehyde wherein the reaction mixture is maintained at a boiling temperature under reflux and formaldehyde is mixed with the stream of condensed vapors returning to the reactor from the reflux condenser. The process produces a diphenylmethane polyamine particularly well suited for phosgenation to form the corresponding poly- isocyanate.

223951

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