C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
260/468, 260/386
C07D 333/48 (2006.01) C07D 213/75 (2006.01) C07D 295/205 (2006.01) C07D 307/91 (2006.01)
Patent
CA 1144562
Mo-2167 LeA 19,838 A PROCESS FOR THE PRODUCTION OF URETHANES USEFUL IN THE PRODUCTION OF ISOCYANATES ABSTRACT OF THE DISCLOSURE The present invention is directed to a process for the production of a urethane. A urea or polyuret, a primary amine and an alcohol are reacted at 120 to 350°C. The reaction is carried out in the presence of an esterifi- cation catalyst for carboxylic acids. Particularly pre- ferred catalysts include organic and inorganic bases which are inert under the reaction conditions, Lewis acids and transition metal salts or chelates. The ure- thanes produced by this process are particularly useful in the production of organic isocyanates. LeA 19,838
362772
Fauss Rudolf
Findeisen Kurt
K"onig Klaus
Penninger Stefan
Sundermann Rudolf
Aktiengesellschaft Bayer
Sherman
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