METHODS FOR PRODUCING (POLY)DIAMINODIPHENYLMETHANE AND (POLY)DIPHENYLMETHANE DIISOCYANATE

The invention relates to the field of producing isocyanates, in particular, to a method for producing (poly)diaminodiphenylmethane used to obtain polyisocyanates. The invention relates to a method for changing a molecular weight distribution of pDADPM by recycling a part of dimeric components to the...

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Bibliographische Detailangaben
Hauptverfasser:	BOBRIKOVA, Anastasiya Aleksandrovna, NAUMOV, Roman Nikolaevich, LENEV, Denis Alekseevich, IOFFE, Alexey Andreevich, MAS, Valeriya Aleksandrovna
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS CHEMISTRY METALLURGY ORGANIC CHEMISTRY
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Beschreibung
Zusammenfassung:	The invention relates to the field of producing isocyanates, in particular, to a method for producing (poly)diaminodiphenylmethane used to obtain polyisocyanates. The invention relates to a method for changing a molecular weight distribution of pDADPM by recycling a part of dimeric components to the synthesis step. The invention also relates to a method for producing (poly)diphenylmethane diisocyanate by reacting the obtained (poly)diaminodiphenylmethane with phosgene, and to the (poly)diphenylmethane diisocyanate obtained by this method.