申请人:BASF Aktiengesellschaft
公开号:US04497963A1
公开(公告)日:1985-02-05
A process for the preparation of an aliphatic, cyclo-aliphatic, 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 a carbamate in the presence of alcohol at temperatures of 160.degree. C. to 300.degree. C., and B. separating the ammonia and other by-products from the aliphatic, cycloaliphatic, and/or aliphatic-cycloaliphatic 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 transferred into the corresponding isocyanates which can then be used for the preparation of polyurethanes.
一种制备脂肪族、环脂肪族和/或脂肪族-环脂肪族二元和/或多元聚氨酯的方法,包括以下步骤:A. 在醇的存在下,将一种脂肪族、环脂肪族和/或脂肪族-环脂肪族二元和/或多元胺与碳酸酯在160°C至300°C的温度下反应,B. 将氨和其他副产物从脂肪族、环脂肪族和/或脂肪族-环脂肪族二元和/或多元聚氨酯中分离出来。可以向反应物中添加一个或多个催化剂以增加反应速率。所生产的脂肪族、环脂肪族和/或脂肪族-环脂肪族二元和/或多元聚氨酯是有价值的终端和中间产品。它们可以转化为相应的异氰酸酯,然后用于制备聚氨酯。