| 摘要 |
A method for the production of blocked isocyanate-and isocyanurate group-containing compounds which comprises: transforming a monomeric aliphatic or cycloaliphatic polyisocyanate or a mixture thereof into an intermediate mixture comprising an isocyanurate containing at least 2 free isocyanate groups; and blocking said intermediate isocyanurate mixture with dimethylketoxime at 50 DEG -120 DEG C.; wherein the amount of said dimethylketoxime is such that one equivalent of NCO group reacts with one equivalent of said dimethylketoxime. The mixtures of the present invention are particularly suited as co-catalysts for the anionic polymerization of epsilon-caprolactam, as well as hardeners for higher functional thermoplastic compounds which contain Zerewitinoff-active hydrogen atoms.
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