Polyamines and a process for their production

Details Polyamines and a process for their production Polyamines and a process for their production

C - Chemistry, Metallurgy

08

G

260/597.5

C08G 18/50 (2006.01) C08G 18/10 (2006.01)

Patent

CA 1215391

Mo-2470 LeA 21,565 POLYAMINES AND A PROCESS FOR THEIR PRODUCTION ABSTRACT OF THE DISCLOSURE Polyamines containing aromatically bound primary amino groups having an NH2-content of from 0.19 to 20.3 wt % are produced by a single stage process. A compound containing aromatically bound NCO-groups and having an isocyanate content of from 0.5 to 40 wt % is hydrolyzed with an excess of water in the presence of a water-miscible polar solvent and optionally a catalyst. The hydrolysis is carried out at a tempera- ture of from -10 to 150°C in a manner such that the reaction mixture is substantially homogeneous. The water-miscible polar solvent generally has a boiling point of from 56 to 250°C and a dielectric constant of at least 10. This polar solvent is used in a quantity of at least 5 parts solvent for every 100 parts of isocyanate. Tertiary amines are the preferred catalysts. These polyamines are particularly useful in the produc- tion of polyurethanes. Mo-2470 LeA 21,565

429747

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