PRODUCTION OF METHYLENE-CROSSLINKED POLYPHENYLENE POLYISOCYANATE

PURPOSE:To obtain highly reactive poly-MDI and high-purity 4,4'-MDI simultaneously by separating the product obtained by reaction of a polyamine with phosgene into a MDI isomer mixture and poly-MDI through distillation and by further separating the isomer mixture through crystallization. CONSTI...

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Bibliographische Detailangaben

Hauptverfasser:	NAGO TAKU, ISHIDA NORITOSHI, TAJIMA JUNJI, NITTA KAZUNARI, SHIMAMATSU MITSUNORI
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC CHEMISTRY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP
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