Polyamines, a process for the production of polyamines and their

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

1982-07-26

1985-09-10

Kight, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

528 60, 528 64, 528 45, 528 62, 528480, 528481, 528489, 564393, 564468, C07C12715, C07C12724

Patent

active

045407207

ABSTRACT:
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 aromatic and/or aliphatic polyamines containing primary NH.sub.2 -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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