C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
260/468.5
C07C 271/06 (2006.01)
Patent
CA 1123000
PROCESS FOR THE PREPARATION OF AN AROMATIC DI- AND/OR POLYURETHANE Abstract of the Disclosure A process for the preparation of an aromatic di- and/or polyurethane comprising the steps of A. reacting a primary aromatic di- and/or poly- amine, urea and an alcohol at temperatures of 160°C to 300°C, and B. separating the ammonia and other by-products from the aromatic di- and/or polyurethane. One or more catalysts may be added to the react- ants to increase the reaction rate. The aromatic di- and/or polyurethanes produced are valuable end and intermediate products. They can be transferred into the corresponding isocyanates which can then be used for the preparation of polyurethanes.
349776
Merger Franz
Towae Friedrich
Basf Aktiengesellschaft
Robic Robic & Associes/associates
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