| 摘要 |
This invention relates to a process for the production of polyureas by reacting organic polyisocyanates with diamines, optionally in the presence of other polyfunctional compounds, i.e. polyfunctional in the isocyanate polyaddition context, having isocyanate-reactive hydrogen atoms, which is distinguished by the fact that the polyisocyanates used have an NCO-content of about 0.5 to 25%, by weight, and which, in addition, have an acylated urea group <IMAGE> content of about 0.5 to 50% by weight and, optionally, a carbodiimide group (-N=C=N-) content of about 0 to 25% by weight.
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