Single-stage process for the production of polyamines and...

Details Single-stage process for the production of polyamines and... Single-stage process for the production of polyamines and...

C - Chemistry, Metallurgy

08

G

260/597.5

C08G 18/10 (2006.01) C08G 18/38 (2006.01) C08G 18/50 (2006.01)

Patent

CA 1222775

Mo-2462 LeA 21,568 A SINGLE-STAGE PROCESS FOR THE PRODUCTION OF POLYAMINES AND POLYAMINES PRODUCED BY SUCH PROCESS ABSTRACT OF THE DISCLOSURE Polyamines containing from 0.19 to 20.3 wt % primary amino groups are produced by hydrolyzing in a single stage an isocyanate with an excess of water, a relatively weak basic compound and a water-miscible polar solvent at a temperature from 50 to 165°C. The hydrolysis is conducted in a manner such that the reactants are substantially homogeneous during the reaction. The isocyanate should have an NCO-content of from 0.5 to 40 wt %. The weakly basic compound may be a carbonate or hydrogen carbonate of an alkali metal or an alkali or alkaline earth salt of a monocarboxylic or polycarboxylic acid or mixtures of such materials. The polyamines produced by this process are particularly useful in the production of polyurethanes.

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