Polyamines, a process for the production of polyamines and...

Details Polyamines, a process for the production of polyamines and... Polyamines, a process for the production of polyamines and...

C - Chemistry, Metallurgy

08

G

402/141, 403/34,

C08G 18/83 (2006.01) C08G 18/10 (2006.01) C08G 18/50 (2006.01) C08G 18/64 (2006.01)

Patent

CA 1221383

POLYAMINES, A PROCESS FOR THE PRODUCTION OF POLYAMINES AND THEIR USE IN THE PRODUCTION OF POLYURETHANES ABSTRACT OF THE DISCLOSURE The invention relates to a simplified, economic process for the production of polyamines by the alkaline hydrolysis of compounds containing terminal aromatic and/or aliphatic isocyanate groups (including modified isocyanates or NCO-prepolymers and semi-prepolymers with NCO-contents of from 0.5 to 40% by weight), with strong aqueous bases,direct isolation of the polyamines from the carbamate stage being possible by thermal carbamate decomposition and/or solvent extraction. The invention also relates to the use of the aro- matic and/or aliphatic polyamines containing primary NH2- groups obtainable by the process according to the invention for the production of polyurethanes, such as optionally cellular polyurethane plastics and polyurethane foams.

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