| 摘要 |
Mo-3353 LeA 26,839 A PROCESS FOR THE PRODUCTION OF ORGANIC AMINES, POLYAMINE MIXTURES AND THEIR USE AS HARDENERS FOR POLYMER PRECURSORS The present invention relates to a process for the production of primary amines containing aliphatically or cycloaliphatically bound amino groups, characterized in that the isocyanate groups of organic isocyanates containing aliphatically and/or cycloaliphatically bound isocyanate groups are formylated with formic acid in a first reaction step and the N-formyl groups are subsequently converted into amino groups. The present invention also relates to polyamine mixtures obtained by this process and containing a) about 40 to 90% by weight, based on the total weight of components a) and b), of N,N',N"-tris-(6-aminohexyl)-iso-cyanurate and b) about 10 to 60% by weight, based on the total weight of components a) and b), of higher homologs of this triamine containing more than one isocyanurate ring. Finally, the present invention relates to the use of these polyamine mixtures as hardeners for polymer precursors containing epoxide or isocyanate groups.
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