MANUFACTURE OF BLOCKED POLYISOCYANATE HAVING CARBODIIMIDO GROUP, POLYSOCYANATE THEREBY AND USE FOR MANUFACTURE OF PLASTIC
1. A process for the production of organic compounds containing (i) carbodiimide and/or uretone imine groups and (ii) blocked isocyanate groups, characterized in that from 30 to 70% of the isocyanate groups of an organic polyisocyanate having a molecular weight of 174 to 1 000 and containing only ar...
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Zusammenfassung: | 1. A process for the production of organic compounds containing (i) carbodiimide and/or uretone imine groups and (ii) blocked isocyanate groups, characterized in that from 30 to 70% of the isocyanate groups of an organic polyisocyanate having a molecular weight of 174 to 1 000 and containing only aromatically bound isocyanate groups are blocked by reaction with a monofunctional blocking agent for isocyanate groups, after which from 65 to 100% of the free isocyanate groups still remaining are converted into carbodiimide groups with elimination of carbon dioxide. |
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