PREPARATION OF FOAMED MATERIAL BASED ON POLYUREA ELASTOMER

摘要

A process for the production of expanded polyurea elastomers which comprises reacting: a) an aliphatic polyetheramine having primary amino functions and essentially no free hydroxyl groups; b) carbon dioxide in the form of carbamate, obtained by reacting carbon dioxide with a portion of the aliphatic polyetheramines; c) a polyisocyanate; d) water; and e) a catalyst having a tertiary amino group; in the presence of f) an inert, halogen-free blowing agent.