Polyamines and a process for their preparation

Details Polyamines and a process for their preparation Polyamines and a process for their preparation

C - Chemistry, Metallurgy

08

G

402/182, 260/597

C08G 18/64 (2006.01) C08G 18/10 (2006.01) C08G 18/46 (2006.01) C08G 18/50 (2006.01)

Patent

CA 1260012

POLYAMINES AND A PROCESS FOR THEIR PREPARATION ABSTRACT OF THE DISCLOSURE Polyamines containing primary amino groups are made by hydrolyzing an isocyanate with water in the presence of a solvent which is a carboxylic acid amide. The solvent must be used in a quantity of at least 10%, by weight solvent based on 100% by weight of isocyanate. The weight ratio pf solvent to water must be from 3 to 200. A homogeneous phase is maintained during the hydrolysis which is carried out at temperatures of from 20 to 210°C. A not incorporable basic and/or metal catalyst may optionally be employed. The polyamines produced by this process are particularly useful for the production of polyurethanes.

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