公开(公告)号：US4724252A

公开(公告)日：1988-02-09

申请号：US895629

申请日：1986-08-11

申请人： Werner Rasshofer

发明人： Werner Rasshofer

IPC分类号： C08G18/00 ,  C08G18/10 ,  C08G18/18 ,  C08G18/20 ,  C08G18/50 ,  C08G18/83

CPC分类号： C08G18/5021 ,  C08G18/10 ,  C08G18/1858 ,  C08G18/2027 ,  C08G18/2063

摘要： Polyamines containing aromatically bound primary amino groups are prepared in a single stage process by hydrolyzing an isocyanate in the presence of a compound containing an amidine and/or guanidine group and a water-miscible, aprotic-dipolar solvent. This hydrolysis is carried out at from 20.degree. to 210.degree. C. with the reactants being in substantially homogeneous phase. The isocyanate starting material contains aromatically bound NCO groups and has NCO content of from 0.5 to 40 wt. %. The compound containing amidine and/or guanidine groups functions as a catalyst and is used in a quantity of at least 0.001 parts by weight for every 100 parts by weight of isocyanate. The water-miscible solvent is used in a quantity of at least 10 parts by weight for every 100 parts by weight of polyisocyanate. The polyamines thus-produced are particularly useful in the production of polyurethanes.

摘要翻译： 通过在含有脒和/或胍基和水混溶性非质子偶极溶剂的化合物的存在下水解异氰酸酯，在单阶段方法中制备含芳香结合的伯氨基的多胺。 该水解在20至210℃下进行，反应物基本上是均匀的相。 异氰酸酯原料含有芳香结合的NCO基团，并且NCO含量为0.5〜40wt。 ％。 含有脒和/或胍基的化合物用作催化剂，并且对于每100重量份的异氰酸酯，其用量至少为0.001重量份。 该水混溶性溶剂的使用量相对于每100重量份多异氰酸酯至少为10重量份。 如此生产的聚胺在聚氨酯的生产中特别有用。