Process for Preparing Carbodiimides
The invention relates to a novel process for preparing carbodiimides comprising the steps ofa) carbodiimidization of isocyanates in the presence of a catalyst,b) separation of the catalyst and/or monomeric isocyanate from the carbodiimide by distillation or extraction to obtain a crude carbodiimide...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | The invention relates to a novel process for preparing carbodiimides comprising the steps ofa) carbodiimidization of isocyanates in the presence of a catalyst,b) separation of the catalyst and/or monomeric isocyanate from the carbodiimide by distillation or extraction to obtain a crude carbodiimide comprising monomeric isocyanate,c) addition of one or more alcohols and partial or complete reaction of the alcohol with the monomeric isocyanate of the crude carbodiimide. |
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