Process for the preparation of an aliphatic, cycloaliphatic,...

Details Process for the preparation of an aliphatic, cycloaliphatic,... Process for the preparation of an aliphatic, cycloaliphatic,...

C - Chemistry, Metallurgy

07

D

260/469

C07D 239/10 (2006.01) C07D 295/13 (2006.01) C08G 18/70 (2006.01)

Patent

CA 1117968

PROCESS FOR THE PREPARATION OF AN ALIPHATIC, CYCLOALIPHATIC AND/OR ALIPHATIC-CYCLOALIPHATIC DI- AND/OR POLYURETHANE Abstract of the Disclosure A process for the preparation of an aliphatic, cycloaliphatic and/or aliphatic-cycloaliphatic di- and/or polyurethane comprising the steps of A. reacting a primary aliphatic, cycloaliphatic, and/or aliphatic cycloaliphatic di- and/or polyamine with urea and an alcohol at temperatures of 160°C to 300°C, and B. separating the ammonia and other by-products from the aliphatic, cycloaliphatic, and/or aliphatic-cyclo- aliphatic di- and/or polyurethane. One or more catalysts may be added to the reactants to increase the reaction rate. The aliphatic, cycloaliphatic, and/or aliphatic-cycloaliphatic di- and/or polyurethanes produced are valuable end and intermediate products. They can be transformed into the corresponding isocyanates which can then be used for the preparation of polyurethanes.

349775

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