| 摘要 |
1. A diurethane diurea of the formula I see diagramm : EP0138769,P10,F1 in which R is in each case a radical derived from a diisocyanate and having at most 20 C atoms, R' is a radical derived from a diol which may contain ether or thioether groups and having a molecular weight of at most 1500, and the radicals R'' are each methyl or ethyl, or both radicals R'' bound to the same N atom, form together with the N atom the piperidino, morpholino or pyrrolidino radical. |
